diff options
Diffstat (limited to 'vendor/petgraph')
119 files changed, 0 insertions, 34105 deletions
diff --git a/vendor/petgraph/.cargo-checksum.json b/vendor/petgraph/.cargo-checksum.json deleted file mode 100644 index 7fec2bc2..00000000 --- a/vendor/petgraph/.cargo-checksum.json +++ /dev/null @@ -1 +0,0 @@ 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\ No newline at end of file diff --git a/vendor/petgraph/CONTRIBUTING.rst b/vendor/petgraph/CONTRIBUTING.rst deleted file mode 100644 index 82836ae2..00000000 --- a/vendor/petgraph/CONTRIBUTING.rst +++ /dev/null @@ -1,129 +0,0 @@ -Contributing to ``petgraph`` -============================ - -Hi! We'd love to have your contributions! If you want help or mentorship, reach -out to us in a GitHub issue, or ping ``bluss`` in `#rust on irc.mozilla.org`_ -and introduce yourself. - -.. _`\#rust on irc.mozilla.org`: irc://irc.mozilla.org#rust - -* `Building`_ - -* `Testing`_ - -* `Pull Requests`_ - - * `Bug Fixes`_ - - * `Performance Improvements`_ - - * `Implementing New Algorithms`_ - -* `Where We Need Help`_ - -* `Team`_ - -Building --------- - -:: - - $ cargo build - -Testing -------- - -:: - - $ cargo test --features all - -Pull Requests -------------- - -All pull requests are reviewed by a team_ member before merging. - -Additionally, different kinds of pull requests have different requirements. - -Bug Fixes -......... - -We love getting bug fixes! - -Make sure to include a regression test, so that we can be sure that we never -accidentally re-introduce the bug again. - -Performance Improvements -........................ - -You made an algorithm faster? Awesome. - -When submitting performance improvement, include the following: - -* A new ``#[bench]`` function that exercises this code path, if one doesn't - already exist - -* Before and after ``cargo bench`` scores, optionally formatted using - `cargo-benchcmp`_ - -.. _`cargo-benchcmp`: https://github.com/BurntSushi/cargo-benchcmp - -Implementing New Algorithms -........................... - -Implementing new graph algorithms is encouraged! - -If you're going to implement a new algorithm, make sure that you do the -following: - -* Add a ``quickcheck`` property test for the new algorithm - -* Add a ``benchmark`` test for measuring performance of the new algorithm - -* Document what the algorithm does and in what situations it should be used - -* Document the big-O running time of the algorithm - -* Include links to relevant reading materials, such as a paper or Wikipedia - -* Make the algorithm work with generic graphs, constraining the generic graph - type parameter with our existing graph traits, like ``Visitable``, or with new - graph traits - -Any team_ member can review a pull request implementing a new algorithm, but the -final decision whether or not the algorithm is appropriate for inclusion in the -``petgraph`` crate is left to ``@bluss``. - -Additionally, assuming that the new algorithm is merged into ``petgraph``, you -are *strongly* encouraged to join the ``petgraph`` team_! *You* are the best -person to review any future bug fixes, performance improvements, and whatever -other changes that affect this new algorithm. - -Where We Need Help ------------------- - -* Issues labeled `"help wanted"`_ are issues where we could use a little help - from you. - -* Issues Labeled `"mentored"`_ are issues that don't really involve any more - investigation, just implementation. We've outlined what needs to be done, and - a team_ member has volunteered to help whoever claims the issue implement it, - and get the implementation merged. - -.. _`"help wanted"`: - https://github.com/bluss/petgraph/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22 - -.. _`"mentored"`: - https://github.com/bluss/petgraph/issues?q=is%3Aopen+is%3Aissue+label%3A%22mentored%22 - -Team ----- - -The ``petgraph`` team consists of: - -* ``@bluss`` -* ``@fitzgen`` - -We need more team members to help spread out reviewing and maintenance -responsibilities — want to join us? `Drop a comment in this issue!`_ - -.. _`Drop a comment in this issue!`: https://github.com/bluss/petgraph/issues/TODO diff --git a/vendor/petgraph/Cargo.toml b/vendor/petgraph/Cargo.toml deleted file mode 100644 index f7c36f35..00000000 --- a/vendor/petgraph/Cargo.toml +++ /dev/null @@ -1,280 +0,0 @@ -# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO -# -# When uploading crates to the registry Cargo will automatically -# "normalize" Cargo.toml files for maximal compatibility -# with all versions of Cargo and also rewrite `path` dependencies -# to registry (e.g., crates.io) dependencies. -# -# If you are reading this file be aware that the original Cargo.toml -# will likely look very different (and much more reasonable). -# See Cargo.toml.orig for the original contents. - -[package] -edition = "2018" -rust-version = "1.64" -name = "petgraph" -version = "0.7.1" -authors = [ - "bluss", - "mitchmindtree", -] -build = false -autolib = false -autobins = false -autoexamples = false -autotests = false -autobenches = false -description = "Graph data structure library. Provides graph types and graph algorithms." -documentation = "https://docs.rs/petgraph/" -readme = "README.md" -keywords = [ - "data-structure", - "graph", - "unionfind", - "graph-algorithms", -] -categories = ["data-structures"] -license = "MIT OR Apache-2.0" -repository = "https://github.com/petgraph/petgraph" - -[package.metadata.docs.rs] -features = [ - "rayon", - "serde-1", - "quickcheck", -] - -[package.metadata.release] -no-dev-version = true - -[profile.bench] -debug = 2 - -[profile.release] - -[lib] -name = "petgraph" -path = "src/lib.rs" -bench = false - -[[test]] -name = "adjacency_matrix" -path = "tests/adjacency_matrix.rs" - -[[test]] -name = "coloring" -path = "tests/coloring.rs" - -[[test]] -name = "floyd_warshall" -path = "tests/floyd_warshall.rs" - -[[test]] -name = "ford_fulkerson" -path = "tests/ford_fulkerson.rs" - -[[test]] -name = "graph" -path = "tests/graph.rs" - -[[test]] -name = "graph6" -path = "tests/graph6.rs" - -[[test]] -name = "graphmap" -path = "tests/graphmap.rs" - -[[test]] -name = "iso" -path = "tests/iso.rs" - -[[test]] -name = "k_shortest_path" -path = "tests/k_shortest_path.rs" - -[[test]] -name = "list" -path = "tests/list.rs" - -[[test]] -name = "matching" -path = "tests/matching.rs" - -[[test]] -name = "min_spanning_tree" -path = "tests/min_spanning_tree.rs" - -[[test]] -name = "operator" -path = "tests/operator.rs" - -[[test]] -name = "page_rank" -path = "tests/page_rank.rs" - -[[test]] -name = "quickcheck" -path = "tests/quickcheck.rs" - -[[test]] -name = "stable_graph" -path = "tests/stable_graph.rs" - -[[test]] -name = "unionfind" -path = "tests/unionfind.rs" - -[[bench]] -name = "acyclic" -path = "benches/acyclic.rs" - -[[bench]] -name = "bellman_ford" -path = "benches/bellman_ford.rs" - -[[bench]] -name = "coloring" -path = "benches/coloring.rs" - -[[bench]] -name = "dijkstra" -path = "benches/dijkstra.rs" - -[[bench]] -name = "feedback_arc_set" -path = "benches/feedback_arc_set.rs" - -[[bench]] -name = "floyd_warshall" -path = "benches/floyd_warshall.rs" - -[[bench]] -name = "ford_fulkerson" -path = "benches/ford_fulkerson.rs" - -[[bench]] -name = "graph6_decoder" -path = "benches/graph6_decoder.rs" - -[[bench]] -name = "graph6_encoder" -path = "benches/graph6_encoder.rs" - -[[bench]] -name = "graphmap" -path = "benches/graphmap.rs" - -[[bench]] -name = "iso" -path = "benches/iso.rs" - -[[bench]] -name = "k_shortest_path" -path = "benches/k_shortest_path.rs" - -[[bench]] -name = "matching" -path = "benches/matching.rs" - -[[bench]] -name = "matrix_graph" -path = "benches/matrix_graph.rs" - -[[bench]] -name = "min_spanning_tree" -path = "benches/min_spanning_tree.rs" - -[[bench]] -name = "ograph" -path = "benches/ograph.rs" - -[[bench]] -name = "page_rank" -path = "benches/page_rank.rs" - -[[bench]] -name = "serialize" -path = "benches/serialize.rs" - -[[bench]] -name = "stable_graph" -path = "benches/stable_graph.rs" - -[[bench]] -name = "unionfind" -path = "benches/unionfind.rs" - -[dependencies.fixedbitset] -version = "0.5.7" -default-features = false - -[dependencies.indexmap] -version = "2.5.0" - -[dependencies.quickcheck] -version = "0.8" -optional = true -default-features = false - -[dependencies.rayon] -version = "1.5.3" -optional = true - -[dependencies.serde] -version = "1.0" -optional = true - -[dependencies.serde_derive] -version = "1.0" -optional = true - -[dev-dependencies.ahash] -version = "0.7.2" - -[dev-dependencies.bincode] -version = "1.3.3" - -[dev-dependencies.defmac] -version = "0.2.1" - -[dev-dependencies.fxhash] -version = "0.2.1" - -[dev-dependencies.itertools] -version = "0.12.1" -default-features = false - -[dev-dependencies.odds] -version = "0.4.0" - -[dev-dependencies.rand] -version = "0.5.5" - -[features] -all = [ - "unstable", - "quickcheck", - "matrix_graph", - "stable_graph", - "graphmap", - "rayon", -] -default = [ - "graphmap", - "stable_graph", - "matrix_graph", -] -generate = [] -graphmap = [] -matrix_graph = [] -rayon = [ - "dep:rayon", - "indexmap/rayon", -] -serde-1 = [ - "serde", - "serde_derive", -] -stable_graph = [] -unstable = ["generate"] diff --git a/vendor/petgraph/LICENSE-APACHE b/vendor/petgraph/LICENSE-APACHE deleted file mode 100644 index 16fe87b0..00000000 --- a/vendor/petgraph/LICENSE-APACHE +++ /dev/null @@ -1,201 +0,0 @@ - Apache License - Version 2.0, January 2004 - http://www.apache.org/licenses/ - -TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION - -1. 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We also recommend that a - file or class name and description of purpose be included on the - same "printed page" as the copyright notice for easier - identification within third-party archives. - -Copyright [yyyy] [name of copyright owner] - -Licensed under the Apache License, Version 2.0 (the "License"); -you may not use this file except in compliance with the License. -You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - -Unless required by applicable law or agreed to in writing, software -distributed under the License is distributed on an "AS IS" BASIS, -WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -See the License for the specific language governing permissions and -limitations under the License. diff --git a/vendor/petgraph/LICENSE-MIT b/vendor/petgraph/LICENSE-MIT deleted file mode 100644 index 9203baa0..00000000 --- a/vendor/petgraph/LICENSE-MIT +++ /dev/null @@ -1,25 +0,0 @@ -Copyright (c) 2015 - -Permission is hereby granted, free of charge, to any -person obtaining a copy of this software and associated -documentation files (the "Software"), to deal in the -Software without restriction, including without -limitation the rights to use, copy, modify, merge, -publish, distribute, sublicense, and/or sell copies of -the Software, and to permit persons to whom the Software -is furnished to do so, subject to the following -conditions: - -The above copyright notice and this permission notice -shall be included in all copies or substantial portions -of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF -ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED -TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A -PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT -SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION -OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR -IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER -DEALINGS IN THE SOFTWARE. diff --git a/vendor/petgraph/Makefile b/vendor/petgraph/Makefile deleted file mode 100644 index 7cd942c6..00000000 --- a/vendor/petgraph/Makefile +++ /dev/null @@ -1,38 +0,0 @@ -DOCCRATES = petgraph fixedbitset - -# deps to delete the generated docs -RMDOCS = - -FEATURES = unstable - -VERSIONS = $(patsubst %,target/VERS/%,$(DOCCRATES)) - -docs: mkdocs mksvgs subst $(RMDOCS) - -# https://www.gnu.org/software/make/manual/html_node/Automatic-Variables.html -$(VERSIONS): Cargo.toml - mkdir -p $(@D) - cargo pkgid $(@F) | sed -e "s/.*#\(\|.*:\)//" > "$@" - -$(DOCCRATES): %: target/VERS/% - # Put in the crate version into the docs - find ./doc/$@ -name "*.html" -exec sed -i -e "s/<title>\(.*\) - Rust/<title>$@ $(shell cat $<) - \1 - Rust/g" {} \; - -subst: $(DOCCRATES) - -mkdocs: Cargo.toml - cargo doc --features=$(FEATURES) - rm -rf ./doc - cp -r ./target/doc ./doc - - cat ./custom.css >> doc/main.css - -$(RMDOCS): mkdocs - rm -r ./doc/$@ - sed -i "/searchIndex\['$@'\]/d" doc/search-index.js - -mksvgs: mkdocs graph-example.dot - dot -Tsvg < ./graph-example.dot > graph-example.svg - mv graph-example.svg ./doc/petgraph/graph/ - - -.PHONY: docs mkdocs mksvgs subst $(DOCCRATES) $(RMDOCS) diff --git a/vendor/petgraph/README.md b/vendor/petgraph/README.md deleted file mode 100644 index 4eba8468..00000000 --- a/vendor/petgraph/README.md +++ /dev/null @@ -1,52 +0,0 @@ - - -# petgraph - -Graph data structure library. Please read the [API documentation here][]. - -Supports Rust 1.64 and later. - -[![Crates.io][crates-badge]][crates-url] -[![docs.rs][docsrs-badge]][docsrs-url] -![MSRV][msrv-badge] -[![Discord chat][discord-badge]][discord-url] -[![build_status][]](https://github.com/petgraph/petgraph/actions) - -Crate feature flags: - -- `graphmap` (default) enable `GraphMap`. -- `stable_graph` (default) enable `StableGraph`. -- `matrix_graph` (default) enable `MatrixGraph`. -- `serde-1` (optional) enable serialization for `Graph, StableGraph, GraphMap` - using serde 1.0. Requires Rust version as required by serde. -- `rayon` (optional) enable parallel iterators for the underlying data in `GraphMap`. Requires Rust version as required by Rayon. - -## Recent Changes - -See [RELEASES][] for a list of changes. The minimum supported rust -version will only change on major releases. - -## Logo - -The mascot is named "Sir Paul Rustory Graphosaurus" (close friends call him Paul). -The logo has been created by the talented Aren. - -## License - -Dual-licensed to be compatible with the Rust project. - -Licensed under the Apache License, Version 2.0 -<http://www.apache.org/licenses/LICENSE-2.0> or the MIT license -<http://opensource.org/licenses/MIT>, at your option. This file may not -be copied, modified, or distributed except according to those terms. - -[API documentation here]: https://docs.rs/petgraph/ -[build_status]: https://github.com/petgraph/petgraph/workflows/Continuous%20integration/badge.svg?branch=master -[docsrs-badge]: https://img.shields.io/docsrs/petgraph -[docsrs-url]: https://docs.rs/petgraph/latest/petgraph/ -[crates-badge]: https://img.shields.io/crates/v/petgraph.svg -[crates-url]: https://crates.io/crates/petgraph -[discord-badge]: https://img.shields.io/discord/1166289348384280616?logo=discord&style=flat -[discord-url]: https://discord.gg/n2tc79tJ4e -[msrv-badge]: https://img.shields.io/badge/rustc-1.64+-blue.svg -[RELEASES]: RELEASES.rst diff --git a/vendor/petgraph/RELEASES.rst b/vendor/petgraph/RELEASES.rst deleted file mode 100644 index 29b42a0f..00000000 --- a/vendor/petgraph/RELEASES.rst +++ /dev/null @@ -1,637 +0,0 @@ -Version 0.7.1 (2025-01-08) -========================== - -- Do not unnecessarily restrict ``indexmap`` version (`#714`_) -- Export ``UndirectedAdaptor`` (`#717`_) - -.. _`#714`: https://github.com/petgraph/petgraph/pull/714 -.. _`#717`: https://github.com/petgraph/petgraph/pull/717 - -Version 0.7.0 (2024-12-31) -========================== - -- Re-released version 0.6.6 with the correct version number, as it included a major update to an exposed crate (`#664`_). - -Version 0.6.6 (2024-12-31 - yanked) -=================================== - -- Add graph6 format encoder and decoder (`#658`_) -- Dynamic Topological Sort algorithm support (`#675`_) -- Add ``UndirectedAdaptor`` (`#695`_) -- Add ``LowerHex`` and ``UpperHex`` implementations for ``Dot`` (`#687`_) -- Make ``serde`` support more complete (`#550`_) -- Process multiple edges in the Floyd-Warshall implementation (`#685`_) -- Update ``fixedbitset`` to 0.5.7 (`#664`_) -- Fix ``immediately_dominated_by`` function called on root of graph returns root itself (`#670`_) -- Fix adjacency matrix for ``Csr`` and ``List`` (`#648`_) -- Fix clippy warnings (`#701`_) -- Add performance note to the ``all_simple_paths`` function documentation (`#693`_) - -.. _`#658`: https://github.com/petgraph/petgraph/pull/658 -.. _`#675`: https://github.com/petgraph/petgraph/pull/675 -.. _`#695`: https://github.com/petgraph/petgraph/pull/695 -.. _`#687`: https://github.com/petgraph/petgraph/pull/687 -.. _`#550`: https://github.com/petgraph/petgraph/pull/550 -.. _`#685`: https://github.com/petgraph/petgraph/pull/685 -.. _`#664`: https://github.com/petgraph/petgraph/pull/664 -.. _`#670`: https://github.com/petgraph/petgraph/pull/670 -.. _`#648`: https://github.com/petgraph/petgraph/pull/648 -.. _`#701`: https://github.com/petgraph/petgraph/pull/701 -.. _`#693`: https://github.com/petgraph/petgraph/pull/693 - -Version 0.6.5 (2024-05-06) -========================== - -- Add rayon support for ``GraphMap`` (`#573`_, `#615`_) -- Add ``Topo::with_initials`` method (`#585`_) -- Add logo to the project (`#598`_) -- Add Ford-Fulkerson algorithm (`#640`_) -- Update ``itertools`` to 0.12.1 (`#628`_) -- Update ``GraphMap`` to allow custom hash functions (`#622`_) -- Fix documentation (`#630`_) -- Fix clippy warnings (`#627`_) -- (internal) Fix remove old ``copyclone`` macro (`#601`_) -- (internal) Move minimum spanning tree into own module (`#624`_) - -.. _`#573`: https://github.com/petgraph/petgraph/pull/573 -.. _`#615`: https://github.com/petgraph/petgraph/pull/615 -.. _`#585`: https://github.com/petgraph/petgraph/pull/585 -.. _`#598`: https://github.com/petgraph/petgraph/pull/598 -.. _`#640`: https://github.com/petgraph/petgraph/pull/640 -.. _`#628`: https://github.com/petgraph/petgraph/pull/628 -.. _`#622`: https://github.com/petgraph/petgraph/pull/622 -.. _`#630`: https://github.com/petgraph/petgraph/pull/630 -.. _`#627`: https://github.com/petgraph/petgraph/pull/627 -.. _`#601`: https://github.com/petgraph/petgraph/pull/601 -.. _`#624`: https://github.com/petgraph/petgraph/pull/624 - -Version 0.6.4 (2023-08-21) -========================== - -- Update ``indexmap`` to 2.0.0 (`#568`_) -- Fix typos (`#544`_) - -.. _`#544`: https://github.com/petgraph/petgraph/pull/544 -.. _`#568`: https://github.com/petgraph/petgraph/pull/568 - -Version 0.6.3 (2023-02-07) -========================== - -- Added an iterator over subgraph isomorphisms (`#500`_) -- Added serde support on ``GraphMap`` (`#496`_) -- Added ``reverse`` method for ``StableGraph`` (`#533`_) -- Added ``edges_connecting`` iterator for ``StableGraph`` (`#521`_) -- Fix Floyd-Warshall algorithm behaviour on undirected graphs (`487`_) -- Fix IntoEdgesDirected implementation for NodeFiltered when direction is Incoming (`476`_) -- Fix cardinality check in subgraph isomorphism (`472`_) -- Fix UB in ``MatrixGraph`` (`#505`_) - -.. _`#472`: https://github.com/petgraph/petgraph/issues/472 -.. _`#476`: https://github.com/petgraph/petgraph/issues/476 -.. _`#487`: https://github.com/petgraph/petgraph/issues/487 -.. _`#496`: https://github.com/petgraph/petgraph/issues/496 -.. _`#500`: https://github.com/petgraph/petgraph/issues/500 -.. _`#505`: https://github.com/petgraph/petgraph/issues/505 -.. _`#521`: https://github.com/petgraph/petgraph/issues/521 -.. _`#533`: https://github.com/petgraph/petgraph/issues/533 - -Version 0.6.2 (2022-05-28) -========================== - -- Loosed the strict version dependency set in `493`_, to allow users to use newer versions of indexmap (`495`_). - -.. _`#495`: https://github.com/petgraph/petgraph/issues/493 - -Version 0.6.1 (2022-05-22) -========================== - -- Added clarifications on Graph docs (`491`_). -- Fix build errors on rust 1.41 (`493`_). - -.. _`#491`: https://github.com/petgraph/petgraph/issues/491 -.. _`#493`: https://github.com/petgraph/petgraph/issues/493 - -Version 0.6.0 (2021-07-04) -========================== - -Breaking changes ----------------- - -- MSRV is now 1.41 (`#444`_). -- Removed the ``NodeCompactIndexable`` trait impl for ``MatrixGraph`` (`#429`_). -- The ``IntoEdges::edges`` implementations are now required return edges with the passed node as source (`#433`_). - -New features ------------- - -- Multiple documentation improvements (`#360`_, `#383`_, `#426`_, `#433`_, `#437`_, `#443`_, `#450`_). -- Added an ``immediately_dominated_by`` method to the dominators result (`#337`_). -- Added ``adj::List``, a new append-only graph type using a simple adjacency list with no node-weights (`#263`_). -- Added ``dag_to_toposorted_adjacency_list`` and ``dag_transitive_reduction_closure`` algorithms to transitively reduce an acyclic graph (`#263`_). -- Made the ``is_isomorphic`` algorithm generic on both graph types (`#369`_). -- Implement Debug and Clone for all the iterators (`#418`_). -- Implement multiple mising traits on graph implementations and adapters (`#405`_, `#429`_). -- Add an EdgeIndexable public trait (`#402`_). -- Added immutable ``node_weights`` and ``edge_weights`` methods for ``Graph`` and ``StableGraph`` (`#363`_). - -New algorithms --------------- - -- Added a k-shortest-path implementation (`#328`_). -- Added a generic graph complement implementation (`#371`_). -- Added a maximum matching implementation (`#400`_). -- Added a Floyd-Warshall shortest path algorithm (`#377`_). -- Added a greedy feedback arc set algorithm (`#386`_). -- Added a `find_negative_cycle` algorithm (`#434`_). - -Performance ------------ - -- Reuse the internal state in ``tarjan_scc`` (`#313`_) -- Reduce memory usage in ``tarjan_scc`` (`#413`_). -- Added tighter size hints to all iterators (`#380`_). -- Optimized ``petgraph::dot`` a bit (`#424`_). -- Optimized StableGraph de-serialization with holes (`#395`_). - -Bug fixes ---------- - -- Fixed A* not producing optimal solutions with inconsistent heuristics (`#379`_). -- Fixed a stacked borrow violation (`#404`_). -- Fixed a panic in ``StableGraph::extend_with_edges`` (`#415`_). -- Fixed multiple bugs in the matrix graph implementation (`#427`_). -- Fixed ``GraphMap::remove_node`` not removing some edges (`#432`_). -- Fixed all clippy warnings (`#440`_, `#449`_). - -Other changes -------------- - -- Now using github actions as CI (`#391`_). -- Replace matchs on `Option<T>` with `map` (`#381`_). -- Added benchmarks for ``tarjan_scc`` (`#421`_). - -.. _`#263`: https://github.com/petgraph/petgraph/issues/263 -.. _`#313`: https://github.com/petgraph/petgraph/issues/313 -.. _`#328`: https://github.com/petgraph/petgraph/issues/328 -.. _`#337`: https://github.com/petgraph/petgraph/issues/337 -.. _`#360`: https://github.com/petgraph/petgraph/issues/360 -.. _`#363`: https://github.com/petgraph/petgraph/issues/363 -.. _`#369`: https://github.com/petgraph/petgraph/issues/369 -.. _`#371`: https://github.com/petgraph/petgraph/issues/371 -.. _`#377`: https://github.com/petgraph/petgraph/issues/377 -.. _`#379`: https://github.com/petgraph/petgraph/issues/378 -.. _`#380`: https://github.com/petgraph/petgraph/issues/380 -.. _`#381`: https://github.com/petgraph/petgraph/issues/381 -.. _`#383`: https://github.com/petgraph/petgraph/issues/383 -.. _`#386`: https://github.com/petgraph/petgraph/issues/386 -.. _`#391`: https://github.com/petgraph/petgraph/issues/391 -.. _`#395`: https://github.com/petgraph/petgraph/issues/395 -.. _`#400`: https://github.com/petgraph/petgraph/issues/400 -.. _`#402`: https://github.com/petgraph/petgraph/issues/402 -.. _`#404`: https://github.com/petgraph/petgraph/issues/404 -.. _`#405`: https://github.com/petgraph/petgraph/issues/405 -.. _`#413`: https://github.com/petgraph/petgraph/issues/413 -.. _`#415`: https://github.com/petgraph/petgraph/issues/415 -.. _`#418`: https://github.com/petgraph/petgraph/issues/418 -.. _`#421`: https://github.com/petgraph/petgraph/issues/421 -.. _`#424`: https://github.com/petgraph/petgraph/issues/424 -.. _`#426`: https://github.com/petgraph/petgraph/issues/426 -.. _`#427`: https://github.com/petgraph/petgraph/issues/427 -.. _`#429`: https://github.com/petgraph/petgraph/issues/429 -.. _`#432`: https://github.com/petgraph/petgraph/issues/432 -.. _`#433`: https://github.com/petgraph/petgraph/issues/433 -.. _`#434`: https://github.com/petgraph/petgraph/issues/434 -.. _`#437`: https://github.com/petgraph/petgraph/issues/437 -.. _`#440`: https://github.com/petgraph/petgraph/issues/440 -.. _`#443`: https://github.com/petgraph/petgraph/issues/443 -.. _`#444`: https://github.com/petgraph/petgraph/issues/444 -.. _`#449`: https://github.com/petgraph/petgraph/issues/449 -.. _`#450`: https://github.com/petgraph/petgraph/issues/450 - - -Version 0.5.1 (2020-05-23) -========================== - -- Implement ``Default`` for traversals. -- Export ``EdgesConnecting`` publicly. -- Implement ``is_bipartite_graph``. -- Add ``FilterNode`` implementation for ``FixedBitSet`` and ``HashSet``. -- Implement ``node_weights_mut`` and ``edge_weights_mut`` for ``StableGraph``. -- Add configurable functions for adding attributes to dotfile features. - -Version 0.5.0 (2019-12-25) -========================== - -Breaking changes ----------------- - -- The iterative DFS implementation, ``Dfs``, now marks nodes visited when - they are pushed onto the stack, not when they're popped off. This may - require changes to callers that use ``Dfs::from_parts`` or manipulate - its internals. -- The ``IntoEdgesDirected`` trait now has a stricter contract for - undirected graphs. Custom implementations of this trait may have to be - updated. See the `trait documentation`__ for more. - -Other changes -------------- - -- Upgrade to Rust 2018 edition -- Fix clippy warnings and unify code formatting -- Improved and enhanced documentation -- Update dependencies including modern quickcheck -- Numerous bugfixes and refactorings -- Added ``MatrixGraph`` implementation - -__ https://docs.rs/petgraph/0.5/petgraph/visit/trait.IntoEdgesDirected.html - -Version 0.4.13 (2018-08-26) -=========================== - -- Fix clippy warnings by @jonasbb -- Add docs for ``Csr`` by @ksadorf -- Fix conflict with new stable method ``find_map`` in new Rust - -Version 0.4.12 (2018-03-26) -=========================== - -- Newtype ``Time`` now also implements ``Hash`` -- Documentation updates for ``Frozen``. - -Version 0.4.11 (2018-01-07) -=========================== - -- Fix ``petgraph::graph::NodeReferences`` to be publicly visible -- Small doc typo and code style files by @shepmaster and @waywardmonkeys -- Fix a future compat warning with pointer casts - -Version 0.4.10 (2017-08-15) -=========================== - -- Add graph trait ``IntoEdgesDirected`` -- Update dependencies - -Version 0.4.9 (2017-10-02) -========================== - -- Fix ``bellman_ford`` to work correctly with undirected graphs (#152) by - @carrutstick -- Performance improvements for ``Graph, Stablegraph``'s ``.map()``. - -Version 0.4.8 (2017-09-20) -========================== - -- ``StableGraph`` learned new methods nearing parity with ``Graph``. Note - that the ``StableGraph`` methods preserve index stability even in the batch - removal methods like ``filter_map`` and ``retain_edges``. - - + Added ``.filter_map()``, which maps associated node and edge data - + Added ``.retain_edges()``, ``.edge_indices()`` and ``.clear_edges()`` - -- Existing ``Graph`` iterators gained some trait impls: - - + ``.node_indices(), .edge_indices()`` are ``ExactSizeIterator`` - + ``.node_references()`` is now - ``DoubleEndedIterator + ExactSizeIterator``. - + ``.edge_references()`` is now ``ExactSizeIterator``. - -- Implemented ``From<StableGraph>`` for ``Graph``. - -Version 0.4.7 (2017-09-16) -========================== - -- New algorithm by @jmcomets: A* search algorithm in ``petgraph::algo::astar`` -- One ``StableGraph`` bug fix whose patch was supposed to be in the previous - version: - - + ``add_edge(m, n, _)`` now properly always panics if nodes m or n don't - exist in the graph. - -Version 0.4.6 (2017-09-12) -========================== - -- New optional crate feature: ``"serde-1"``, which enables serialization - for ``Graph`` and ``StableGraph`` using serde. -- Add methods ``new``, ``add_node`` to ``Csr`` by @jmcomets -- Add indexing with ``[]`` by node index, ``NodeCompactIndexable`` for - ``Csr`` by @jmcomets -- Amend doc for ``GraphMap::into_graph`` (it has a case where it can panic) -- Add implementation of ``From<Graph>`` for ``StableGraph``. -- Add implementation of ``IntoNodeReferences`` for ``&StableGraph``. -- Add method ``StableGraph::map`` that maps associated data -- Add method ``StableGraph::find_edge_undirected`` -- Many ``StableGraph`` bug fixes involving node vacancies (holes left by - deletions): - - + ``neighbors(n)`` and similar neighbor and edge iterator methods now - handle n being a vacancy properly. (This produces an empty iterator.) - + ``find_edge(m, n)`` now handles m being a vacancy correctly too - + ``StableGraph::node_bound`` was fixed for empty graphs and returns 0 - -- Add implementation of ``DoubleEndedIterator`` to ``Graph, StableGraph``'s - edge references iterators. -- Debug output for ``Graph`` now shows node and edge count. ``Graph, StableGraph`` - show nothing for the edges list if it's empty (no label). -- ``Arbitrary`` implementation for ``StableGraph`` now can produce graphs with - vacancies (used by quickcheck) - -Version 0.4.5 (2017-06-16) -========================== - -- Fix ``max`` ambiguity error with current rust nightly by @daboross (#153) - -Version 0.4.4 (2017-03-14) -========================== - -- Add ``GraphMap::all_edges_mut()`` iterator by @Binero -- Add ``StableGraph::retain_nodes`` by @Rupsbant -- Add ``StableGraph::index_twice_mut`` by @christolliday - -Version 0.4.3 (2017-01-21) -========================== - -- Add crate categories - -Version 0.4.2 (2017-01-06) -========================== - -- Move the ``visit.rs`` file due to changed rules for a module’s directory - ownership in Rust, resolving a future compat warning. -- The error types ``Cycle, NegativeCycle`` now implement ``PartialEq``. - -Version 0.4.1 (2016-10-26) -========================== - -- Add new algorithm ``simple_fast`` for computing dominators in a control-flow - graph. - -Version 0.4.0 (2016-10-17) -========================== - -Breaking changes in ``Graph`` ------------------------------ - -- ``Graph::edges`` and the other edges methods now return an iterator of - edge references - -Other breaking changes ----------------------- - -- ``toposort`` now returns an error if the graph had a cycle. -- ``is_cyclic_directed`` no longer takes a dfs space argument. It is - now recursive. -- ``scc`` was renamed to ``kosaraju_scc``. -- ``min_spanning_tree`` now returns an iterator that needs to be - made into a specific graph type deliberately. -- ``dijkstra`` now uses the ``IntoEdges`` trait. -- ``NodeIndexable`` changed its method signatures. -- ``IntoExternals`` was removed, and many other smaller adjustments - in graph traits. ``NodeId`` must now implement ``PartialEq``, for example. -- ``DfsIter, BfsIter`` were removed in favour of a more general approach - with the ``Walker`` trait and its iterator conversion. - -New features ------------- - -- New graph traits, for example ``IntoEdges`` which returns - an iterator of edge references. Everything implements the graph traits - much more consistently. -- Traits for associated data access and building graphs: ``DataMap``, - ``Build, Create, FromElements``. -- Graph adaptors: ``EdgeFiltered``. ``Filtered`` was renamed to ``NodeFiltered``. -- New algorithms: bellman-ford -- New graph: compressed sparse row (``Csr``). -- ``GraphMap`` implements ``NodeIndexable``. -- ``Dot`` was generalized - -Version 0.3.2 (2016-10-11) -========================== - - - Add ``depth_first_search``, a recursive dfs visitor that emits discovery, - finishing and edge classification events. - - Add graph adaptor ``Filtered``. - - impl ``Debug, NodeIndexable`` for ``Reversed``. - -Version 0.3.1 (2016-10-05) -========================== - -- Add ``.edges(), .edges_directed()`` to ``StableGraph``. Note that these - differ from ``Graph``, because this is the signature they will all use - in the future. -- Add ``.update_edge()`` to ``StableGraph``. -- Add reexports of common items in ``stable_graph`` module (for example - ``NodeIndex``). -- Minor performance improvements to graph iteration -- Improved docs for ``visit`` module. - -Version 0.3.0 (2016-10-03) -========================== - -- Overhaul all graph visitor traits so that they use the ``IntoIterator`` - style. This makes them composable. - - - Multiple graph algorithms use new visitor traits. - - **Help is welcome to port more algorithms (and create new graph traits in - the process)!** - -- ``GraphMap`` can now have directed edges. ``GraphMap::new`` is now generic - in the edge type. ``DiGraphMap`` and ``UnGraphMap`` are new type aliases. -- Add type aliases ``DiGraph, UnGraph, StableDiGraph, StableUnGraph`` -- ``GraphMap`` is based on the indexmap crate. Deterministic iteration - order, faster iteration, no side tables needed to convert to ``Graph``. -- Improved docs for a lot of types and functions. -- Add graph visitor ``DfsPostOrder`` -- ``Dfs`` gained new methods ``from_parts`` and ``reset``. -- New algo ``has_path_connecting``. -- New algo ``tarjan_scc``, a second scc implementation. -- Document traversal order in ``Dfs, DfsPostOrder, scc, tarjan_scc``. -- Optional graph visitor workspace reuse in ``has_path_connecting``, - ``is_cyclic_directed, toposort``. -- Improved ``Debug`` formatting for ``Graph, StableGraph``. -- Add a prelude module -- ``GraphMap`` now has a method ``.into_graph()`` that makes a ``Graph``. -- ``Graph::retain_nodes, retain_edges`` now expose the self graph only - as wrapped in ``Frozen``, so that weights can be mutated but the - graph structure not. -- Enable ``StableGraph`` by default -- Add method ``Graph::contains_edge``. -- Renamed ``EdgeDirection`` → ``Direction``. -- Remove ``SubTopo``. -- Require Rust 1.12 or later - -Version 0.2.10 (2016-07-27) -=========================== - -- Fix compilation with rust nightly - -Version 0.2.9 (2016-10-01) -========================== - -- Fix a bug in SubTopo (#81) - -Version 0.2.8 (2016-09-12) -========================== - -- Add Graph methods reserve_nodes, reserve_edges, reserve_exact_nodes, - reserve_exact_edges, shrink_to_fit_edges, shrink_to_fit_nodes, shrink_to_fit - -Version 0.2.7 (2016-04-22) -========================== - -- Update URLs - -Version 0.2.6 (2016-04-20) -========================== - -- Fix warning about type parameter defaults (no functional change) - -Version 0.2.5 (2016-04-10) -========================== - -- Add SubTopo, a topo walker for the subgraph reachable from a starting point. -- Add condensation, which forms the graph of a graph’s strongly connected - components. - -Version 0.2.4 (2016-04-05) -========================== - -- Fix an algorithm error in scc (#61). This time we have a test that - crosschecks the result of the algorithm vs another implementation, for - greater confidence in its correctness. - -Version 0.2.3 (2016-02-22) -========================== - -- Require Rust 1.6: Due to changes in how rust uses type parameter defaults. -- Implement Graph::clone_from. - -Version 0.2.2 (2015-12-14) -========================== - -- Require Rust 1.5 -- ``Dot`` passes on the alternate flag to node and edge label formatting -- Add ``Clone`` impl for some iterators -- Document edge iteration order for ``Graph::neighbors`` -- Add *experimental feature* ``StableGraph``, using feature flag ``stable_graph`` - -Version 0.2.1 (2015-12-06) -========================== - -- Add algorithm ``is_isomorphic_matching`` - -Version 0.2.0 (2015-12-03) -========================== - -New Features ------------- - -- Add Graph::neighbors().detach() to step edges without borrowing. - This is more general than, and replaces now deprecated - walk_edges_directed. (#39) -- Implement Default for Graph, GraphMap -- Add method EdgeDirection::opposite() - -Breaking changes ----------------- - -- Graph::neighbors() for undirected graphs and Graph::neighbors_undirected - for any graph now visit self loop edges once, not twice. (#31) -- Renamed Graph::without_edges to Graph::externals -- Removed Graph::edges_both -- GraphMap::add_edge now returns ``Option<E>`` -- Element type of ``GraphMap<N, E>::all_edges()`` changed to ``(N, N, &E)`` - -Minor breaking changes ----------------------- - -- IntoWeightedEdge changed a type parameter to associated type -- IndexType is now an unsafe trait -- Removed IndexType::{one, zero}, use method new instead. -- Removed MinScored -- Ptr moved to the graphmap module. -- Directed, Undirected are now void enums. -- Fields of graphmap::Edges are now private (#19) - -Version 0.1.18 (2015-11-30) -=========================== - -- Fix bug on calling GraphMap::add_edge with existing edge (#35) - -Version 0.1.17 (2015-11-25) -=========================== - -- Add Graph::capacity(), GraphMap::capacity() -- Fix bug in Graph::reverse() -- Graph and GraphMap have `quickcheck::Arbitrary` implementations, - if optional feature `check` is enabled. - -Version 0.1.16 (2015-11-25) -=========================== - -- Add Graph::node_indices(), Graph::edge_indices() -- Add Graph::retain_nodes(), Graph::retain_edges() -- Add Graph::extend_with_edges(), Graph::from_edges() -- Add functions petgraph::graph::{edge_index, node_index}; -- Add GraphMap::extend(), GraphMap::from_edges() -- Add petgraph::dot::Dot for simple graphviz dot output - -Version 0.1.15 (2015-11-20) -=========================== - -- Add Graph::clear_edges() -- Add Graph::edge_endpoints() -- Add Graph::map() and Graph::filter_map() - -Version 0.1.14 (2015-11-19) -=========================== - -- Add new topological order visitor Topo -- New graph traits NeighborsDirected, Externals, Revisitable - -Version 0.1.13 (2015-11-11) -=========================== - -- Add iterator GraphMap::all_edges - -Version 0.1.12 (2015-11-07) -=========================== - -- Fix an algorithm error in scc (#14) - -Version 0.1.11 (2015-08-16) -=========================== - -- Update for well-formedness warnings (Rust RFC 1214), adding - new lifetime bounds on NeighborIter and Dfs, impact should be minimal. - -Version 0.1.10 (2015-06-22) -=========================== - -- Fix bug in WalkEdges::next_neighbor() - -Version 0.1.9 (2015-06-17) -========================== - -- Fix Dfs/Bfs for a rustc bugfix that disallowed them -- Add method next_neighbor() to WalkEdges - -Version 0.1.8 (2015-06-08) -========================== - -- Add Graph::walk_edges_directed() -- Add Graph::index_twice_mut() - -Version 0.1.7 (2015-06-08) -========================== - -- Add Graph::edges_directed() - -Version 0.1.6 (2015-06-04) -========================== - -- Add Graph::node_weights_mut and Graph::edge_weights_mut - -Version 0.1.4 (2015-05-20) -========================== - -- Add back DfsIter, BfsIter diff --git a/vendor/petgraph/assets/LICENSE.md b/vendor/petgraph/assets/LICENSE.md deleted file mode 100644 index ba81e524..00000000 --- a/vendor/petgraph/assets/LICENSE.md +++ /dev/null @@ -1,7 +0,0 @@ -Graphosaurus (c) by the petgraph project.
-
-Graphosaurus is licensed under a
-Creative Commons Attribution-ShareAlike 4.0 International License.
-
-You should have received a copy of the license along with this
-work. If not, see <http://creativecommons.org/licenses/by-sa/4.0/>.
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-use petgraph::algo::{toposort, DfsSpace}; -use petgraph::prelude::*; -use petgraph::{acyclic::Acyclic, data::Build}; -use std::cmp::max; -use test::Bencher; - -/// Dynamic toposort using Acyclic<G> -#[bench] -#[allow(clippy::needless_range_loop)] -fn acyclic_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 100; - let mut g = Acyclic::<DiGraph<usize, ()>>::new(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - - bench.iter(|| { - let mut g = g.clone(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32) as usize; - let j_to = i; - for j in j_from..j_to { - let n2 = nodes[j]; - g.try_add_edge(n1, n2, ()).unwrap(); - } - } - }); -} - -/// As a baseline: build the graph and toposort it every time a new edge is added -#[bench] -#[allow(clippy::needless_range_loop)] -fn toposort_baseline_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 100; - let mut g = DiGraph::<usize, ()>::new(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - - bench.iter(|| { - let mut g = g.clone(); - let mut space = DfsSpace::new(&g); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32) as usize; - let j_to = i; - for j in j_from..j_to { - let n2 = nodes[j]; - g.add_edge(n1, n2, ()); - let _order = toposort(&g, Some(&mut space)); - } - } - }); -} diff --git a/vendor/petgraph/benches/bellman_ford.rs b/vendor/petgraph/benches/bellman_ford.rs deleted file mode 100644 index 6cd80583..00000000 --- a/vendor/petgraph/benches/bellman_ford.rs +++ /dev/null @@ -1,62 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use std::cmp::{max, min}; -use test::Bencher; - -use petgraph::algo::{bellman_ford, find_negative_cycle}; - -#[bench] -#[allow(clippy::needless_range_loop)] -fn bellman_ford_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 100; - let mut g = Graph::new(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize; - let j_to = min(NODE_COUNT, j_from + neighbour_count); - for j in j_from..j_to { - let n2 = nodes[j]; - let mut distance: f64 = ((i + 3) % 10) as f64; - if n1 != n2 { - distance -= 1.0 - } - g.add_edge(n1, n2, distance); - } - } - - bench.iter(|| { - let _scores = bellman_ford(&g, nodes[0]); - }); -} - -#[bench] -#[allow(clippy::needless_range_loop)] -fn find_negative_cycle_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 100; - let mut g = Graph::new(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize; - let j_to = min(NODE_COUNT, j_from + neighbour_count); - for j in j_from..j_to { - let n2 = nodes[j]; - let mut distance: f64 = ((i + 3) % 10) as f64; - if n1 != n2 { - distance -= 1.0 - } - g.add_edge(n1, n2, distance); - } - } - - bench.iter(|| { - let _scores = find_negative_cycle(&g, nodes[0]); - }); -} diff --git a/vendor/petgraph/benches/coloring.rs b/vendor/petgraph/benches/coloring.rs deleted file mode 100644 index 3b1c3c43..00000000 --- a/vendor/petgraph/benches/coloring.rs +++ /dev/null @@ -1,31 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use std::cmp::{max, min}; -use test::Bencher; - -use petgraph::algo::dsatur_coloring; - -#[bench] -fn dsatur_coloring_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 10_000; - let mut g = Graph::new_undirected(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).into_iter().map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize; - let j_to = min(NODE_COUNT, j_from + neighbour_count); - for j in j_from..j_to { - let n2 = nodes[j]; - g.add_edge(n1, n2, ()); - } - } - - bench.iter(|| { - let _scores = dsatur_coloring(&g); - }); -} diff --git a/vendor/petgraph/benches/common/factories.rs b/vendor/petgraph/benches/common/factories.rs deleted file mode 100644 index 974b26f8..00000000 --- a/vendor/petgraph/benches/common/factories.rs +++ /dev/null @@ -1,334 +0,0 @@ -use std::marker::PhantomData; - -use petgraph::data::Build; -use petgraph::prelude::*; -use petgraph::visit::NodeIndexable; - -use petgraph::EdgeType; - -/// Petersen A and B are isomorphic -/// -/// http://www.dharwadker.org/tevet/isomorphism/ -const PETERSEN_A: &str = " - 0 1 0 0 1 0 1 0 0 0 - 1 0 1 0 0 0 0 1 0 0 - 0 1 0 1 0 0 0 0 1 0 - 0 0 1 0 1 0 0 0 0 1 - 1 0 0 1 0 1 0 0 0 0 - 0 0 0 0 1 0 0 1 1 0 - 1 0 0 0 0 0 0 0 1 1 - 0 1 0 0 0 1 0 0 0 1 - 0 0 1 0 0 1 1 0 0 0 - 0 0 0 1 0 0 1 1 0 0 -"; - -const PETERSEN_B: &str = " - 0 0 0 1 0 1 0 0 0 1 - 0 0 0 1 1 0 1 0 0 0 - 0 0 0 0 0 0 1 1 0 1 - 1 1 0 0 0 0 0 1 0 0 - 0 1 0 0 0 0 0 0 1 1 - 1 0 0 0 0 0 1 0 1 0 - 0 1 1 0 0 1 0 0 0 0 - 0 0 1 1 0 0 0 0 1 0 - 0 0 0 0 1 1 0 1 0 0 - 1 0 1 0 1 0 0 0 0 0 -"; - -/// An almost full set, isomorphic -const FULL_A: &str = " - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 0 1 1 1 0 1 - 1 1 1 1 1 1 1 1 1 1 -"; - -const FULL_B: &str = " - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 0 1 1 1 0 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 -"; - -/// Praust A and B are not isomorphic -const PRAUST_A: &str = " - 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 - 1 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 - 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 - 0 1 0 0 1 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 - 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 - 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 - 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 - 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 - 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 - 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 - 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 - 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 - 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 -"; - -const PRAUST_B: &str = " - 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 - 1 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 - 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 - 0 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 - 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 - 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 - 0 1 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 0 - 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 1 0 1 - 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 1 0 1 0 - 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 1 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 0 - 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 1 0 - 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 0 0 1 - 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 0 0 1 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 1 1 0 -"; - -const BIGGER: &str = " - 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 1 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 - 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 - 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 1 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 - 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 0 1 1 0 1 1 1 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 - 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 1 1 0 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 - 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 - 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 - 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 - 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 - 0 1 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 - 0 1 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 - 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 - 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 - 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 - 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 -"; - -/// A random bipartite graph. -const BIPARTITE: &str = " - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 1 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 1 - 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 - 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 1 1 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 - 0 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 - 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 -"; - -/// Parse a text adjacency matrix format into a directed graph -fn parse_graph<Ty, G>(s: &str) -> G -where - Ty: EdgeType, - G: Default + Build<NodeWeight = (), EdgeWeight = ()> + NodeIndexable, -{ - let mut g: G = Default::default(); - let s = s.trim(); - let lines = s.lines().filter(|l| !l.is_empty()); - for (row, line) in lines.enumerate() { - for (col, word) in line.split(' ').filter(|s| !s.is_empty()).enumerate() { - let has_edge = word.parse::<i32>().unwrap(); - assert!(has_edge == 0 || has_edge == 1); - if has_edge == 0 { - continue; - } - while col >= g.node_count() || row >= g.node_count() { - g.add_node(()); - } - let a = g.from_index(row); - let b = g.from_index(col); - g.update_edge(a, b, ()); - } - } - g -} - -pub struct GraphFactory<Ty, G = Graph<(), (), Ty>> { - ty: PhantomData<Ty>, - g: PhantomData<G>, -} - -impl<Ty, G> GraphFactory<Ty, G> -where - Ty: EdgeType, - G: Default + Build<NodeWeight = (), EdgeWeight = ()> + NodeIndexable, -{ - fn new() -> Self { - GraphFactory { - ty: PhantomData, - g: PhantomData, - } - } - - pub fn petersen_a(self) -> G { - parse_graph::<Ty, _>(PETERSEN_A) - } - - pub fn petersen_b(self) -> G { - parse_graph::<Ty, _>(PETERSEN_B) - } - - pub fn full_a(self) -> G { - parse_graph::<Ty, _>(FULL_A) - } - - pub fn full_b(self) -> G { - parse_graph::<Ty, _>(FULL_B) - } - - pub fn praust_a(self) -> G { - parse_graph::<Ty, _>(PRAUST_A) - } - - pub fn praust_b(self) -> G { - parse_graph::<Ty, _>(PRAUST_B) - } - - pub fn bigger(self) -> G { - parse_graph::<Ty, _>(BIGGER) - } - - pub fn bipartite(self) -> G { - parse_graph::<Ty, _>(BIPARTITE) - } -} - -pub fn graph<Ty: EdgeType>() -> GraphFactory<Ty, Graph<(), (), Ty>> { - GraphFactory::new() -} - -pub fn ungraph() -> GraphFactory<Undirected, Graph<(), (), Undirected>> { - graph() -} - -pub fn digraph() -> GraphFactory<Directed, Graph<(), (), Directed>> { - graph() -} - -pub fn stable_graph<Ty: EdgeType>() -> GraphFactory<Ty, StableGraph<(), (), Ty>> { - GraphFactory::new() -} - -pub fn stable_ungraph() -> GraphFactory<Undirected, StableGraph<(), (), Undirected>> { - stable_graph() -} - -pub fn stable_digraph() -> GraphFactory<Directed, StableGraph<(), (), Directed>> { - stable_graph() -} - -pub fn tournament(node_count: usize) -> DiGraph<(), ()> { - let mut edge_forward = true; - let mut g = DiGraph::new(); - - for _ in 0..node_count { - g.add_node(()); - } - - for i in g.node_indices() { - for j in g.node_indices() { - if i >= j { - continue; - } - let (source, target) = if edge_forward { (i, j) } else { (j, i) }; - g.add_edge(source, target, ()); - edge_forward = !edge_forward; - } - } - - g -} - -/// An F_(1,n) graph (where **|E| == 2(|N|) - 1**) with pseudo-random edge directions. -pub fn directed_fan(n: usize) -> DiGraph<(), ()> { - let mut g = DiGraph::new(); - - for _ in 0..(n + 1) { - g.add_node(()); - } - - let mut indices = g.node_indices(); - let ix_0 = indices.next().unwrap(); - let mut edge_forward = true; - let mut prev_ix = None; - - for ix in indices { - let (source, target) = if edge_forward { (ix_0, ix) } else { (ix, ix_0) }; - - g.add_edge(source, target, ()); - - if let Some(prev_ix) = prev_ix { - let (source, target) = if edge_forward { - (prev_ix, ix) - } else { - (ix, prev_ix) - }; - g.add_edge(source, target, ()); - } - - edge_forward = !edge_forward; - prev_ix = Some(ix); - } - - g -} diff --git a/vendor/petgraph/benches/common/mod.rs b/vendor/petgraph/benches/common/mod.rs deleted file mode 100644 index 739c0419..00000000 --- a/vendor/petgraph/benches/common/mod.rs +++ /dev/null @@ -1,2 +0,0 @@ -mod factories; -pub use factories::*; diff --git a/vendor/petgraph/benches/dijkstra.rs b/vendor/petgraph/benches/dijkstra.rs deleted file mode 100644 index 020a8396..00000000 --- a/vendor/petgraph/benches/dijkstra.rs +++ /dev/null @@ -1,33 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use std::cmp::{max, min}; -use test::Bencher; - -use petgraph::algo::dijkstra; - -#[bench] -#[allow(clippy::needless_range_loop)] -fn dijkstra_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 10_000; - let mut g = Graph::new_undirected(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize; - let j_to = min(NODE_COUNT, j_from + neighbour_count); - for j in j_from..j_to { - let n2 = nodes[j]; - let distance = (i + 3) % 10; - g.add_edge(n1, n2, distance); - } - } - - bench.iter(|| { - let _scores = dijkstra(&g, nodes[0], None, |e| *e.weight()); - }); -} diff --git a/vendor/petgraph/benches/feedback_arc_set.rs b/vendor/petgraph/benches/feedback_arc_set.rs deleted file mode 100644 index 8fed43b7..00000000 --- a/vendor/petgraph/benches/feedback_arc_set.rs +++ /dev/null @@ -1,55 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use test::Bencher; - -use petgraph::algo::greedy_feedback_arc_set; - -#[allow(dead_code)] -mod common; - -use common::{directed_fan, tournament}; - -#[bench] -fn greedy_fas_tournament_10_bench(bench: &mut Bencher) { - let g = tournament(10); - - bench.iter(|| greedy_feedback_arc_set(&g).for_each(|_| ())) -} - -#[bench] -fn greedy_fas_tournament_50_bench(bench: &mut Bencher) { - let g = tournament(50); - - bench.iter(|| greedy_feedback_arc_set(&g).for_each(|_| ())) -} - -#[bench] -fn greedy_fas_tournament_200_bench(bench: &mut Bencher) { - let g = tournament(200); - - bench.iter(|| greedy_feedback_arc_set(&g).for_each(|_| ())) -} - -#[bench] -fn greedy_fas_fan_10_bench(bench: &mut Bencher) { - let g = directed_fan(10); - - bench.iter(|| greedy_feedback_arc_set(&g).for_each(|_| ())) -} - -#[bench] -fn greedy_fas_fan_200_bench(bench: &mut Bencher) { - let g = directed_fan(200); - - bench.iter(|| greedy_feedback_arc_set(&g).for_each(|_| ())) -} - -#[bench] -fn greedy_fas_fan_1000_bench(bench: &mut Bencher) { - let g = directed_fan(1000); - - bench.iter(|| greedy_feedback_arc_set(&g).for_each(|_| ())) -} diff --git a/vendor/petgraph/benches/floyd_warshall.rs b/vendor/petgraph/benches/floyd_warshall.rs deleted file mode 100644 index 5f25b132..00000000 --- a/vendor/petgraph/benches/floyd_warshall.rs +++ /dev/null @@ -1,33 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use std::cmp::{max, min}; -use test::Bencher; - -use petgraph::algo::floyd_warshall; - -#[bench] -#[allow(clippy::needless_range_loop)] -fn floyd_warshall_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 100; - let mut g = Graph::new_undirected(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize; - let j_to = min(NODE_COUNT, j_from + neighbour_count); - for j in j_from..j_to { - let n2 = nodes[j]; - let distance = (i + 3) % 10; - g.add_edge(n1, n2, distance); - } - } - - bench.iter(|| { - let _scores = floyd_warshall(&g, |e| *e.weight()); - }); -} diff --git a/vendor/petgraph/benches/ford_fulkerson.rs b/vendor/petgraph/benches/ford_fulkerson.rs deleted file mode 100644 index ca027113..00000000 --- a/vendor/petgraph/benches/ford_fulkerson.rs +++ /dev/null @@ -1,24 +0,0 @@ -#![feature(test)] -extern crate petgraph; -extern crate test; - -use petgraph::algo::ford_fulkerson; -use petgraph::prelude::{Graph, NodeIndex}; -use test::Bencher; - -#[bench] -fn ford_fulkerson_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 1_000; - let mut g: Graph<usize, usize> = Graph::new(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT - 1 { - g.add_edge(nodes[i], nodes[i + 1], 1); - } - bench.iter(|| { - let _flow = ford_fulkerson( - &g, - NodeIndex::from(0), - NodeIndex::from(g.node_count() as u32 - 1), - ); - }); -} diff --git a/vendor/petgraph/benches/graph6_decoder.rs b/vendor/petgraph/benches/graph6_decoder.rs deleted file mode 100644 index dd6b5b9d..00000000 --- a/vendor/petgraph/benches/graph6_decoder.rs +++ /dev/null @@ -1,37 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::graph6::from_graph6_representation; -use test::Bencher; - -#[bench] -fn from_graph6_str_complete_7(bench: &mut Bencher) { - from_graph6_bench(bench, r"F~~~w"); -} - -#[bench] -fn from_graph6_str_petersen(bench: &mut Bencher) { - from_graph6_bench(bench, r"IheA@GUAo"); -} - -#[bench] -fn from_graph6_str_62(bench: &mut Bencher) { - from_graph6_bench( - bench, - r"}x@?xx|G[RO{QRDDMWAJ@XAT\M@IBsP?P[jJKOECP_QKSsL@_Th?mUp@@WC_woIl_nI?AF_ISAGNGxe?pikrJVOwWEqoMKhWGAjk[XPn?WUGrWC]jUjwPJLF@?OU?IGSoqT_rpEM[KCpTvGYBgRvOyJ`\adaY?qsESfR{IQWs?mT}bB@[|?p}MOCOEUZKMw]xKeV[en_EK{eBN?Add?H_@GeE_Bo@?_?PmabQuWc?FHVWcwCLWUF]l??WdIOtyePOc`Sb{SGCU[[__b[OiWnDeCXB@CwW@q_GAYY^eWD[tmoPDf{W]eKjzWCCKOj_", - ); -} - -#[bench] -fn from_graph6_str_63(bench: &mut Bencher) { - from_graph6_bench( - bench, - r"~??~`U@aoLr_G\V`YnUdSA[@PG?CjSvrrFONaJODKrXQMOMEcExcwEILVHfUDsB[rGLhVVYJgI?DRSBAgsFwAVzs@gct_AL`NkAoRCaHOaTGWcgPs{@a_s^HLZBaB_[W_o__U|aRGLpdK@{EJ?xQOCcOksK_X@AI`aleB\KDwlOX?_@`_K@SD?QOQ?dAz]?hb{UYvdRRoQPrGKdgfUKIDQM\mZCjJW|?~XcoyIHEr~HycEDToBFD?_DT?bYNaQaQ`BMAYWuyo@Uz{dQwViiepaHfAdaaGO[CHW]ggCka?s@g@b?cbI[a@`BlU^nFxy?YL?R[GKIPm_", - ); -} - -fn from_graph6_bench(bench: &mut Bencher, graph6_str: &str) { - bench.iter(|| (from_graph6_representation::<u16>(graph6_str.to_string()))); -} diff --git a/vendor/petgraph/benches/graph6_encoder.rs b/vendor/petgraph/benches/graph6_encoder.rs deleted file mode 100644 index ad994790..00000000 --- a/vendor/petgraph/benches/graph6_encoder.rs +++ /dev/null @@ -1,35 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::graph6::ToGraph6; -use test::Bencher; - -#[allow(dead_code)] -mod common; -use common::ungraph; - -#[bench] -fn graph6_string_praust_bench(bench: &mut Bencher) { - let a = ungraph().praust_a(); - let b = ungraph().praust_b(); - - bench.iter(|| (a.graph6_string(), b.graph6_string())); -} - -#[bench] -fn graph6_string_full_bench(bench: &mut Bencher) { - let a = ungraph().full_a(); - let b = ungraph().full_b(); - - bench.iter(|| (a.graph6_string(), b.graph6_string())); -} - -#[bench] -fn graph6_string_petersen_bench(bench: &mut Bencher) { - let a = ungraph().petersen_a(); - let b = ungraph().petersen_b(); - - bench.iter(|| (a.graph6_string(), b.graph6_string())); -} diff --git a/vendor/petgraph/benches/graphmap.rs b/vendor/petgraph/benches/graphmap.rs deleted file mode 100644 index d9f7c1a0..00000000 --- a/vendor/petgraph/benches/graphmap.rs +++ /dev/null @@ -1,94 +0,0 @@ -#![feature(test)] -#![cfg(feature = "rayon")] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use rayon::iter::ParallelIterator; -use std::hash::BuildHasher; -use test::Bencher; - -#[derive(Clone, Eq, Hash, Ord, PartialEq, PartialOrd)] -struct MyStruct { - u: String, - v: String, - w: String, -} - -fn test_nodes() -> Vec<MyStruct> { - let mut nodes = vec![]; - for i in 0..2500 { - nodes.push(MyStruct { - u: format!("X {}", i), - v: format!("Y {} Y", i), - w: format!("{}Z", i), - }); - } - - nodes -} - -fn test_graph<H: BuildHasher + Default>( - data: &Vec<MyStruct>, -) -> GraphMap<&MyStruct, usize, Directed, H> { - let mut gr = GraphMap::new(); - - for i in 0..2500 { - gr.add_node(&data[i]); - } - - for i in 0..1_000 { - for j in 999..2000 { - gr.add_edge(&data[i], &data[j], i * j); - } - } - - gr -} - -macro_rules! test_case_with_hasher { - ($name:ident, $hasher:path) => { - #[bench] - fn $name(bench: &mut Bencher) { - let data = test_nodes(); - let gr = test_graph::<$hasher>(&data); - bench.iter(|| { - let mut sources = vec![]; - for n in gr.nodes() { - for (src, _, e) in gr.edges_directed(n, Direction::Outgoing) { - if *e == 500 { - sources.push(src.clone()); - } - } - } - }); - } - }; -} - -test_case_with_hasher!(graphmap_serial_bench, std::hash::RandomState); -test_case_with_hasher!(graphmap_serial_bench_fxhash, fxhash::FxBuildHasher); -test_case_with_hasher!(graphmap_serial_bench_ahash, ahash::RandomState); - -#[bench] -fn graphmap_parallel_bench(bench: &mut Bencher) { - let data = test_nodes(); - let gr = test_graph::<std::hash::RandomState>(&data); - bench.iter(|| { - let sources: Vec<MyStruct> = gr - .par_nodes() - .map(|n| { - let mut sources = vec![]; - for (src, _, e) in gr.edges_directed(n, Direction::Outgoing) { - if *e == 500 { - sources.push(src.clone()); - } - } - - sources - }) - .flatten() - .collect(); - }); -} diff --git a/vendor/petgraph/benches/iso.rs b/vendor/petgraph/benches/iso.rs deleted file mode 100644 index 353d7d4c..00000000 --- a/vendor/petgraph/benches/iso.rs +++ /dev/null @@ -1,57 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use test::Bencher; - -#[allow(dead_code)] -mod common; -use common::*; - -use petgraph::algo::is_isomorphic; - -#[bench] -fn petersen_iso_bench(bench: &mut Bencher) { - let a = digraph().petersen_a(); - let b = digraph().petersen_b(); - - bench.iter(|| is_isomorphic(&a, &b)); - assert!(is_isomorphic(&a, &b)); -} - -#[bench] -fn petersen_undir_iso_bench(bench: &mut Bencher) { - let a = ungraph().petersen_a(); - let b = ungraph().petersen_b(); - - bench.iter(|| is_isomorphic(&a, &b)); - assert!(is_isomorphic(&a, &b)); -} - -#[bench] -fn full_iso_bench(bench: &mut Bencher) { - let a = ungraph().full_a(); - let b = ungraph().full_b(); - - bench.iter(|| is_isomorphic(&a, &b)); - assert!(is_isomorphic(&a, &b)); -} - -#[bench] -fn praust_dir_no_iso_bench(bench: &mut Bencher) { - let a = digraph().praust_a(); - let b = digraph().praust_b(); - - bench.iter(|| is_isomorphic(&a, &b)); - assert!(!is_isomorphic(&a, &b)); -} - -#[bench] -fn praust_undir_no_iso_bench(bench: &mut Bencher) { - let a = ungraph().praust_a(); - let b = ungraph().praust_b(); - - bench.iter(|| is_isomorphic(&a, &b)); - assert!(!is_isomorphic(&a, &b)); -} diff --git a/vendor/petgraph/benches/k_shortest_path.rs b/vendor/petgraph/benches/k_shortest_path.rs deleted file mode 100644 index 5618a546..00000000 --- a/vendor/petgraph/benches/k_shortest_path.rs +++ /dev/null @@ -1,31 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use std::cmp::{max, min}; -use test::Bencher; - -use petgraph::algo::k_shortest_path; - -#[bench] -#[allow(clippy::needless_range_loop)] -fn k_shortest_path_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 10_000; - let mut g = Graph::new_undirected(); - let nodes: Vec<NodeIndex<_>> = (0..NODE_COUNT).map(|i| g.add_node(i)).collect(); - for i in 0..NODE_COUNT { - let n1 = nodes[i]; - let neighbour_count = i % 8 + 3; - let j_from = max(0, i as i32 - neighbour_count as i32 / 2) as usize; - let j_to = min(NODE_COUNT, j_from + neighbour_count); - for j in j_from..j_to { - let n2 = nodes[j]; - let distance = (i + 3) % 10; - g.add_edge(n1, n2, distance); - } - } - - bench.iter(|| k_shortest_path(&g, nodes[0], None, 2, |e| *e.weight())); -} diff --git a/vendor/petgraph/benches/matching.rs b/vendor/petgraph/benches/matching.rs deleted file mode 100644 index 42d2859c..00000000 --- a/vendor/petgraph/benches/matching.rs +++ /dev/null @@ -1,78 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use test::Bencher; - -#[allow(dead_code)] -mod common; -use common::*; - -use petgraph::algo::{greedy_matching, maximum_matching}; -use petgraph::graph::UnGraph; - -fn huge() -> UnGraph<(), ()> { - static NODE_COUNT: u32 = 1_000; - - let mut edges = Vec::new(); - - for i in 0..NODE_COUNT { - for j in i..NODE_COUNT { - if i % 3 == 0 && j % 2 == 0 { - edges.push((i, j)); - } - } - } - - // 999 nodes, 83500 edges - UnGraph::from_edges(&edges) -} - -#[bench] -fn greedy_matching_bipartite(bench: &mut Bencher) { - let g = ungraph().bipartite(); - bench.iter(|| greedy_matching(&g)); -} - -#[bench] -fn greedy_matching_full(bench: &mut Bencher) { - let g = ungraph().full_a(); - bench.iter(|| greedy_matching(&g)); -} - -#[bench] -fn greedy_matching_bigger(bench: &mut Bencher) { - let g = ungraph().bigger(); - bench.iter(|| greedy_matching(&g)); -} - -#[bench] -fn greedy_matching_huge(bench: &mut Bencher) { - let g = huge(); - bench.iter(|| greedy_matching(&g)); -} - -#[bench] -fn maximum_matching_bipartite(bench: &mut Bencher) { - let g = ungraph().bipartite(); - bench.iter(|| maximum_matching(&g)); -} - -#[bench] -fn maximum_matching_full(bench: &mut Bencher) { - let g = ungraph().full_a(); - bench.iter(|| maximum_matching(&g)); -} - -#[bench] -fn maximum_matching_bigger(bench: &mut Bencher) { - let g = ungraph().bigger(); - bench.iter(|| maximum_matching(&g)); -} - -#[bench] -fn maximum_matching_huge(bench: &mut Bencher) { - let g = huge(); - bench.iter(|| maximum_matching(&g)); -} diff --git a/vendor/petgraph/benches/matrix_graph.rs b/vendor/petgraph/benches/matrix_graph.rs deleted file mode 100644 index 3d59f1b0..00000000 --- a/vendor/petgraph/benches/matrix_graph.rs +++ /dev/null @@ -1,246 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use test::Bencher; - -use petgraph::algo; -use petgraph::matrix_graph::{node_index, MatrixGraph}; -use petgraph::{Directed, EdgeType, Incoming, Outgoing}; - -#[bench] -fn add_100_nodes(b: &mut test::Bencher) { - b.iter(|| { - let mut g = MatrixGraph::<(), ()>::with_capacity(100); - - for _ in 0..100 { - let _ = g.add_node(()); - } - }); -} - -#[bench] -fn add_100_edges_to_self(b: &mut test::Bencher) { - let mut g = MatrixGraph::<(), ()>::with_capacity(100); - let nodes: Vec<_> = (0..100).map(|_| g.add_node(())).collect(); - let g = g; - - b.iter(|| { - let mut g = g.clone(); - - for &node in nodes.iter() { - g.add_edge(node, node, ()); - } - }); -} - -#[bench] -fn add_5_edges_for_each_of_100_nodes(b: &mut test::Bencher) { - let mut g = MatrixGraph::<(), ()>::with_capacity(100); - let nodes: Vec<_> = (0..100).map(|_| g.add_node(())).collect(); - let g = g; - - let edges_to_add: Vec<_> = nodes - .iter() - .enumerate() - .flat_map(|(i, &node)| { - let edges: Vec<_> = (0..5) - .map(|j| (i + j + 1) % nodes.len()) - .map(|j| (node, nodes[j])) - .collect(); - - edges - }) - .collect(); - - b.iter(|| { - let mut g = g.clone(); - - for &(source, target) in edges_to_add.iter() { - g.add_edge(source, target, ()); - } - }); -} - -#[bench] -fn add_edges_from_root(bench: &mut test::Bencher) { - bench.iter(|| { - let mut gr = MatrixGraph::new(); - let a = gr.add_node(()); - - for _ in 0..100 { - let b = gr.add_node(()); - gr.add_edge(a, b, ()); - } - }); -} - -#[bench] -fn add_adjacent_edges(bench: &mut test::Bencher) { - bench.iter(|| { - let mut gr = MatrixGraph::new(); - let mut prev = None; - for _ in 0..100 { - let b = gr.add_node(()); - - if let Some(a) = prev { - gr.add_edge(a, b, ()); - } - - prev = Some(b); - } - }); -} - -/// An almost full set -const FULL: &str = " - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 0 1 1 1 0 1 - 1 1 1 1 1 1 1 1 1 1 -"; - -const BIGGER: &str = " - 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 1 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 - 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 - 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 1 0 1 1 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 - 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 0 1 1 0 1 1 1 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 - 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 1 1 0 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 - 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 - 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 - 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 - 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 - 0 1 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 - 0 1 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 - 0 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 - 0 1 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 - 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 - 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 -"; - -/// Parse a text adjacency matrix format into a directed graph -fn parse_matrix<Ty: EdgeType>(s: &str) -> MatrixGraph<(), (), Ty> { - let mut gr = MatrixGraph::default(); - let s = s.trim(); - let lines = s.lines().filter(|l| !l.is_empty()); - for (row, line) in lines.enumerate() { - for (col, word) in line.split(' ').filter(|s| !s.is_empty()).enumerate() { - let has_edge = word.parse::<i32>().unwrap(); - assert!(has_edge == 0 || has_edge == 1); - if has_edge == 0 { - continue; - } - while col >= gr.node_count() || row >= gr.node_count() { - gr.add_node(()); - } - gr.add_edge(node_index(row), node_index(col), ()); - } - } - gr -} - -#[bench] -fn full_edges_out(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(FULL); - bench.iter(|| a.edges_directed(node_index(1), Outgoing).count()) -} - -#[bench] -fn full_edges_in(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(FULL); - bench.iter(|| a.edges_directed(node_index(1), Incoming).count()) -} - -#[bench] -fn full_neighbors_out(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(FULL); - bench.iter(|| a.neighbors_directed(node_index(1), Outgoing).count()) -} - -#[bench] -fn full_neighbors_in(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(FULL); - - bench.iter(|| a.neighbors_directed(node_index(1), Incoming).count()) -} - -#[bench] -fn full_kosaraju_sccs(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(FULL); - bench.iter(|| algo::kosaraju_scc(&a)); -} - -#[bench] -fn full_tarjan_sccs(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(FULL); - bench.iter(|| algo::tarjan_scc(&a)); -} - -#[bench] -fn bigger_edges_out(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(BIGGER); - bench.iter(|| a.edges_directed(node_index(1), Outgoing).count()) -} - -#[bench] -fn bigger_edges_in(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(BIGGER); - bench.iter(|| a.edges_directed(node_index(1), Incoming).count()) -} - -#[bench] -fn bigger_neighbors_out(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(BIGGER); - bench.iter(|| a.neighbors_directed(node_index(1), Outgoing).count()) -} - -#[bench] -fn bigger_neighbors_in(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(BIGGER); - - bench.iter(|| a.neighbors_directed(node_index(1), Incoming).count()) -} - -#[bench] -fn bigger_kosaraju_sccs(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(BIGGER); - bench.iter(|| algo::kosaraju_scc(&a)); -} - -#[bench] -fn bigger_tarjan_sccs(bench: &mut Bencher) { - let a = parse_matrix::<Directed>(BIGGER); - bench.iter(|| algo::tarjan_scc(&a)); -} diff --git a/vendor/petgraph/benches/min_spanning_tree.rs b/vendor/petgraph/benches/min_spanning_tree.rs deleted file mode 100644 index ba274ed5..00000000 --- a/vendor/petgraph/benches/min_spanning_tree.rs +++ /dev/null @@ -1,60 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use test::Bencher; - -#[allow(dead_code)] -mod common; -use common::{digraph, ungraph}; - -use petgraph::algo::min_spanning_tree; - -#[bench] -fn min_spanning_tree_praust_undir_bench(bench: &mut Bencher) { - let a = ungraph().praust_a(); - let b = ungraph().praust_b(); - - bench.iter(|| (min_spanning_tree(&a), min_spanning_tree(&b))); -} - -#[bench] -fn min_spanning_tree_praust_dir_bench(bench: &mut Bencher) { - let a = digraph().praust_a(); - let b = digraph().praust_b(); - - bench.iter(|| (min_spanning_tree(&a), min_spanning_tree(&b))); -} - -#[bench] -fn min_spanning_tree_full_undir_bench(bench: &mut Bencher) { - let a = ungraph().full_a(); - let b = ungraph().full_b(); - - bench.iter(|| (min_spanning_tree(&a), min_spanning_tree(&b))); -} - -#[bench] -fn min_spanning_tree_full_dir_bench(bench: &mut Bencher) { - let a = digraph().full_a(); - let b = digraph().full_b(); - - bench.iter(|| (min_spanning_tree(&a), min_spanning_tree(&b))); -} - -#[bench] -fn min_spanning_tree_petersen_undir_bench(bench: &mut Bencher) { - let a = ungraph().petersen_a(); - let b = ungraph().petersen_b(); - - bench.iter(|| (min_spanning_tree(&a), min_spanning_tree(&b))); -} - -#[bench] -fn min_spanning_tree_petersen_dir_bench(bench: &mut Bencher) { - let a = digraph().petersen_a(); - let b = digraph().petersen_b(); - - bench.iter(|| (min_spanning_tree(&a), min_spanning_tree(&b))); -} diff --git a/vendor/petgraph/benches/ograph.rs b/vendor/petgraph/benches/ograph.rs deleted file mode 100644 index d3f29869..00000000 --- a/vendor/petgraph/benches/ograph.rs +++ /dev/null @@ -1,52 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::graph::Graph; - -#[bench] -fn bench_inser(b: &mut test::Bencher) { - let mut og = Graph::new(); - let fst = og.add_node(0i32); - for x in 1..125 { - let n = og.add_node(x); - og.add_edge(fst, n, ()); - } - b.iter(|| og.add_node(1)) -} - -#[bench] -fn bench_add_edge(b: &mut test::Bencher) { - let mut og = Graph::new(); - for _ in 0..100 { - og.add_node(()); - } - - b.iter(|| { - for (a, b) in og.node_indices().zip(og.node_indices().skip(1)) { - og.add_edge(a, b, ()); - } - og.clear_edges(); - }) -} - -#[bench] -fn bench_remove(b: &mut test::Bencher) { - // removal is very slow in a big graph. - // and this one doesn't even have many nodes. - let mut og = Graph::new(); - let fst = og.add_node(0i32); - let mut prev = fst; - for x in 1..1250 { - let n = og.add_node(x); - og.add_edge(prev, n, ()); - prev = n; - } - //println!("{}", og); - b.iter(|| { - for _ in 0..100 { - og.remove_node(fst); - } - }) -} diff --git a/vendor/petgraph/benches/page_rank.rs b/vendor/petgraph/benches/page_rank.rs deleted file mode 100644 index a7a6bbaf..00000000 --- a/vendor/petgraph/benches/page_rank.rs +++ /dev/null @@ -1,36 +0,0 @@ -#![feature(test)] -extern crate petgraph; -extern crate test; - -use test::Bencher; - -use petgraph::algo::page_rank; - -#[allow(dead_code)] -mod common; - -use common::directed_fan; - -#[cfg(feature = "rayon")] -use petgraph::algo::page_rank::parallel_page_rank; -#[cfg(feature = "rayon")] -use rayon::prelude::*; - -#[bench] -fn page_rank_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 500; - let g = directed_fan(NODE_COUNT); - bench.iter(|| { - let _ranks = page_rank(&g, 0.6_f64, 10); - }); -} - -#[bench] -#[cfg(feature = "rayon")] -fn par_page_rank_bench(bench: &mut Bencher) { - static NODE_COUNT: usize = 2_000; - let g = directed_fan(NODE_COUNT); - bench.iter(|| { - let _ranks = parallel_page_rank(&g, 0.6_f64, 100, None); - }); -} diff --git a/vendor/petgraph/benches/serialize.rs b/vendor/petgraph/benches/serialize.rs deleted file mode 100644 index a771d8e5..00000000 --- a/vendor/petgraph/benches/serialize.rs +++ /dev/null @@ -1,55 +0,0 @@ -#![feature(test)] - -#[cfg(feature = "serde-1")] -mod serialize { - extern crate petgraph; - extern crate test; - - use petgraph::prelude::*; - use rand::Rng; - use test::Bencher; - - const NUM_NODES: usize = 1_000_000; - const NUM_EDGES: usize = 100_000; - const NUM_HOLES: usize = 1_000_000; - - fn make_stable_graph() -> StableGraph<u32, u32> { - let mut g = StableGraph::with_capacity(NUM_NODES + NUM_HOLES, NUM_EDGES); - let indices: Vec<_> = (0..NUM_NODES + NUM_HOLES) - .map(|i| g.add_node(i as u32)) - .collect(); - - let mut rng = rand::thread_rng(); - g.extend_with_edges((0..NUM_EDGES).map(|_| { - let first = rng.gen_range(0, NUM_NODES + NUM_HOLES); - let second = rng.gen_range(0, NUM_NODES + NUM_HOLES - 1); - let second = second + (second >= first) as usize; - let weight: u32 = rng.gen(); - (indices[first], indices[second], weight) - })); - - // Remove nodes to make the structure a bit more interesting - while g.node_count() > NUM_NODES { - let idx = rng.gen_range(0, indices.len()); - g.remove_node(indices[idx]); - } - - g - } - - #[bench] - fn serialize_stable_graph(bench: &mut Bencher) { - let graph = make_stable_graph(); - bench.iter(|| bincode::serialize(&graph).unwrap()); - } - - #[bench] - fn deserialize_stable_graph(bench: &mut Bencher) { - let graph = make_stable_graph(); - let data = bincode::serialize(&graph).unwrap(); - bench.iter(|| { - let graph2: StableGraph<u32, u32> = bincode::deserialize(&data).unwrap(); - graph2 - }); - } -} diff --git a/vendor/petgraph/benches/stable_graph.rs b/vendor/petgraph/benches/stable_graph.rs deleted file mode 100644 index 1638373f..00000000 --- a/vendor/petgraph/benches/stable_graph.rs +++ /dev/null @@ -1,97 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use petgraph::prelude::*; -use test::Bencher; - -#[allow(dead_code)] -mod common; -use common::*; - -use petgraph::stable_graph::node_index; - -#[bench] -fn full_edges_default(bench: &mut Bencher) { - let a = stable_digraph().full_a(); - bench.iter(|| a.edges(node_index(1)).count()) -} - -#[bench] -fn full_edges_out(bench: &mut Bencher) { - let a = stable_digraph().full_a(); - bench.iter(|| a.edges_directed(node_index(1), Outgoing).count()) -} - -#[bench] -fn full_edges_in(bench: &mut Bencher) { - let a = stable_digraph().full_a(); - bench.iter(|| a.edges_directed(node_index(1), Incoming).count()) -} - -#[bench] -fn neighbors_default(bench: &mut Bencher) { - let a = stable_digraph().full_a(); - bench.iter(|| a.neighbors(node_index(1)).count()) -} - -#[bench] -fn neighbors_out(bench: &mut Bencher) { - let a = stable_digraph().full_a(); - bench.iter(|| a.neighbors_directed(node_index(1), Outgoing).count()) -} - -#[bench] -fn neighbors_in(bench: &mut Bencher) { - let a = stable_digraph().full_a(); - bench.iter(|| a.neighbors_directed(node_index(1), Incoming).count()) -} - -#[bench] -fn sccs_kosaraju_stable_graph(bench: &mut Bencher) { - let a = stable_digraph().bigger(); - bench.iter(|| petgraph::algo::kosaraju_scc(&a)); -} - -#[bench] -fn sccs_kosaraju_graph(bench: &mut Bencher) { - let a = digraph().bigger(); - bench.iter(|| petgraph::algo::kosaraju_scc(&a)); -} - -#[bench] -fn sccs_tarjan_stable_graph(bench: &mut Bencher) { - let a = stable_digraph().bigger(); - bench.iter(|| petgraph::algo::tarjan_scc(&a)); -} - -#[bench] -fn sccs_tarjan_graph(bench: &mut Bencher) { - let a = digraph().bigger(); - bench.iter(|| petgraph::algo::tarjan_scc(&a)); -} - -#[bench] -fn stable_graph_map(bench: &mut Bencher) { - let a = stable_digraph().bigger(); - bench.iter(|| a.map(|i, _| i, |i, _| i)); -} - -#[bench] -fn graph_map(bench: &mut Bencher) { - let a = digraph().bigger(); - bench.iter(|| a.map(|i, _| i, |i, _| i)); -} - -#[bench] -fn stable_graph_retain_nodes(bench: &mut Bencher) { - let mut a = stable_digraph().bigger(); - bench.iter(|| a.retain_nodes(|_gr, i| (i.index() + 1) % 3700 != 0)); -} - -#[bench] -fn stable_graph_retain_edges(bench: &mut Bencher) { - let mut a = stable_digraph().bigger(); - bench.iter(|| a.retain_edges(|_gr, i| (i.index() + 1) % 3700 != 0)); -} diff --git a/vendor/petgraph/benches/unionfind.rs b/vendor/petgraph/benches/unionfind.rs deleted file mode 100644 index 4c960802..00000000 --- a/vendor/petgraph/benches/unionfind.rs +++ /dev/null @@ -1,108 +0,0 @@ -#![feature(test)] - -extern crate petgraph; -extern crate test; - -use test::Bencher; - -#[allow(dead_code)] -mod common; -use common::*; - -use petgraph::algo::{connected_components, is_cyclic_undirected}; - -#[bench] -fn connected_components_praust_undir_bench(bench: &mut Bencher) { - let a = ungraph().praust_a(); - let b = ungraph().praust_b(); - - bench.iter(|| (connected_components(&a), connected_components(&b))); -} - -#[bench] -fn connected_components_praust_dir_bench(bench: &mut Bencher) { - let a = digraph().praust_a(); - let b = digraph().praust_b(); - - bench.iter(|| (connected_components(&a), connected_components(&b))); -} - -#[bench] -fn connected_components_full_undir_bench(bench: &mut Bencher) { - let a = ungraph().full_a(); - let b = ungraph().full_b(); - - bench.iter(|| (connected_components(&a), connected_components(&b))); -} - -#[bench] -fn connected_components_full_dir_bench(bench: &mut Bencher) { - let a = digraph().full_a(); - let b = digraph().full_b(); - - bench.iter(|| (connected_components(&a), connected_components(&b))); -} - -#[bench] -fn connected_components_petersen_undir_bench(bench: &mut Bencher) { - let a = ungraph().petersen_a(); - let b = ungraph().petersen_b(); - - bench.iter(|| (connected_components(&a), connected_components(&b))); -} - -#[bench] -fn connected_components_petersen_dir_bench(bench: &mut Bencher) { - let a = digraph().petersen_a(); - let b = digraph().petersen_b(); - - bench.iter(|| (connected_components(&a), connected_components(&b))); -} - -#[bench] -fn is_cyclic_undirected_praust_undir_bench(bench: &mut Bencher) { - let a = ungraph().praust_a(); - let b = ungraph().praust_b(); - - bench.iter(|| (is_cyclic_undirected(&a), is_cyclic_undirected(&b))); -} - -#[bench] -fn is_cyclic_undirected_praust_dir_bench(bench: &mut Bencher) { - let a = digraph().praust_a(); - let b = digraph().praust_b(); - - bench.iter(|| (is_cyclic_undirected(&a), is_cyclic_undirected(&b))); -} - -#[bench] -fn is_cyclic_undirected_full_undir_bench(bench: &mut Bencher) { - let a = ungraph().full_a(); - let b = ungraph().full_b(); - - bench.iter(|| (is_cyclic_undirected(&a), is_cyclic_undirected(&b))); -} - -#[bench] -fn is_cyclic_undirected_full_dir_bench(bench: &mut Bencher) { - let a = digraph().full_a(); - let b = digraph().full_b(); - - bench.iter(|| (is_cyclic_undirected(&a), is_cyclic_undirected(&b))); -} - -#[bench] -fn is_cyclic_undirected_petersen_undir_bench(bench: &mut Bencher) { - let a = ungraph().petersen_a(); - let b = ungraph().petersen_b(); - - bench.iter(|| (is_cyclic_undirected(&a), is_cyclic_undirected(&b))); -} - -#[bench] -fn is_cyclic_undirected_petersen_dir_bench(bench: &mut Bencher) { - let a = digraph().petersen_a(); - let b = digraph().petersen_b(); - - bench.iter(|| (is_cyclic_undirected(&a), is_cyclic_undirected(&b))); -} diff --git a/vendor/petgraph/clippy.toml b/vendor/petgraph/clippy.toml deleted file mode 100644 index a652995f..00000000 --- a/vendor/petgraph/clippy.toml +++ /dev/null @@ -1 +0,0 @@ -msrv = "1.41.0"
\ No newline at end of file diff --git a/vendor/petgraph/custom.css b/vendor/petgraph/custom.css deleted file mode 100644 index 8e0b7053..00000000 --- a/vendor/petgraph/custom.css +++ /dev/null @@ -1,25 +0,0 @@ - -.docblock pre.rust { background: #eeeeff; } -pre.trait, pre.fn, pre.struct, pre.enum, pre.typedef { background: #fcfefc; } - -/* Small “example” label for doc examples */ -.docblock pre.rust::before { - content: "example"; - float: right; - font-style: italic; - font-size: 0.8em; - margin-top: -10px; - margin-right: -5px; -} - - -/* Fixup where display in trait listing */ -pre.trait .where::before { -content: '\a '; -} - -.docblock code { - background-color: inherit; - font-weight: bold; - padding: 0 0.1em; -} diff --git a/vendor/petgraph/graph-example.dot b/vendor/petgraph/graph-example.dot deleted file mode 100644 index f78ce41f..00000000 --- a/vendor/petgraph/graph-example.dot +++ /dev/null @@ -1,15 +0,0 @@ -digraph { -rankdir = "LR"; -splines = true; - - 0 [label="petgraph"] - 1 [label="fixedbitset"] - 2 [label="quickcheck"] - 3 [label="rand"] - 4 [label="libc"] - 0 -> 1 - 0 -> 2 - 2 -> 3 - 3 -> 4 - 2 -> 4 -} diff --git a/vendor/petgraph/src/acyclic.rs b/vendor/petgraph/src/acyclic.rs deleted file mode 100644 index 801a7b3a..00000000 --- a/vendor/petgraph/src/acyclic.rs +++ /dev/null @@ -1,867 +0,0 @@ -//! A wrapper around graph types that enforces an acyclicity invariant. - -use std::{ - cell::RefCell, - cmp::Ordering, - collections::{BTreeMap, BTreeSet}, - convert::TryFrom, - ops::{Deref, RangeBounds}, -}; - -use crate::{ - adj::IndexType, - algo::Cycle, - data::{Build, Create, DataMap, DataMapMut}, - graph::NodeIndex, - prelude::DiGraph, - visit::{ - dfs_visitor, Control, Data, DfsEvent, EdgeCount, EdgeIndexable, GetAdjacencyMatrix, - GraphBase, GraphProp, IntoEdgeReferences, IntoEdges, IntoEdgesDirected, IntoNeighbors, - IntoNeighborsDirected, IntoNodeIdentifiers, IntoNodeReferences, NodeCompactIndexable, - NodeCount, NodeIndexable, Reversed, Time, Visitable, - }, - Direction, -}; - -#[cfg(feature = "stable_graph")] -use crate::stable_graph::StableDiGraph; - -mod order_map; -use fixedbitset::FixedBitSet; -use order_map::OrderMap; -pub use order_map::TopologicalPosition; - -/// A directed acyclic graph. -/// -/// Wrap directed acyclic graphs and expose an API that ensures the invariant -/// is maintained, i.e. no cycles can be created. This uses a topological order -/// that is dynamically updated when edges are added. In the worst case, the -/// runtime may be linear in the number of vertices, but it has been shown to -/// be fast in practice, particularly on sparse graphs (Pierce and Kelly, 2004). -/// -/// To be modifiable (and hence to be useful), the graphs of generic type `G` -/// should implement the [`Build`] trait. Good candidates for `G` are thus -/// [`crate::graph::DiGraph`] and [`crate::stable_graph::StableDiGraph`]. -/// -/// ## Algorithm -/// This implements the PK algorithm for dynamic topological sort described in -/// "A Dynamic Topological Sort Algorithm for Directed Acyclic Graphs" by -/// D. Pierce and P. Kelly, JEA, 2004. It maintains a topological order of the -/// nodes that can be efficiently updated when edges are added. Achieves a good -/// balance between simplicity and performance in practice, see the paper for -/// discussions of the running time. -/// -/// ## Graph traits -/// All graph traits are delegated to the inner graph, with the exception of -/// the graph construction trait [`Build`]. The wrapped graph can thus only -/// be modified through the wrapped API that ensures no cycles are created. -/// -/// ## Behaviour on cycles -/// By design, edge additions to this datatype may fail. It is recommended to -/// prefer the dedicated [`Acyclic::try_add_edge`] and -/// [`Acyclic::try_update_edge`] methods whenever possible. The -/// [`Build::update_edge`] methods will panic if it is attempted to add an edge -/// that would create a cycle. The [`Build::add_edge`] on the other hand method -/// will return `None` if the edge cannot be added (either it already exists on -/// a graph type that does not support it or would create a cycle). -#[derive(Clone, Debug)] -pub struct Acyclic<G: Visitable> { - /// The underlying graph, accessible through the `inner` method. - graph: G, - /// The current topological order of the nodes. - order_map: OrderMap<G::NodeId>, - - // We fix the internal DFS maps to FixedBitSet instead of G::VisitMap to do - // faster resets (by just setting bits to false) - /// Helper map for DFS tracking discovered nodes. - discovered: RefCell<FixedBitSet>, - /// Helper map for DFS tracking finished nodes. - finished: RefCell<FixedBitSet>, -} - -/// An error that can occur during edge addition for acyclic graphs. -#[derive(Clone, Debug, PartialEq)] -pub enum AcyclicEdgeError<N> { - /// The edge would create a cycle. - Cycle(Cycle<N>), - /// The edge would create a self-loop. - SelfLoop, - /// Could not successfully add the edge to the underlying graph. - InvalidEdge, -} - -impl<N> From<Cycle<N>> for AcyclicEdgeError<N> { - fn from(cycle: Cycle<N>) -> Self { - AcyclicEdgeError::Cycle(cycle) - } -} - -impl<G: Visitable> Acyclic<G> { - /// Create a new empty acyclic graph. - pub fn new() -> Self - where - G: Default, - { - Default::default() - } - - /// Get an iterator over the nodes, ordered by their position. - pub fn nodes_iter(&self) -> impl Iterator<Item = G::NodeId> + '_ { - self.order_map.nodes_iter() - } - - /// Get an iterator over the nodes within the range of positions. - /// - /// The nodes are ordered by their position in the topological sort. - pub fn range<'r>( - &'r self, - range: impl RangeBounds<TopologicalPosition> + 'r, - ) -> impl Iterator<Item = G::NodeId> + 'r { - self.order_map.range(range) - } - - /// Get the underlying graph. - pub fn inner(&self) -> &G { - &self.graph - } - - /// Get the underlying graph mutably. - /// - /// This cannot be public because it might break the acyclicity invariant. - fn inner_mut(&mut self) -> &mut G { - &mut self.graph - } - - /// Consume the `Acyclic` wrapper and return the underlying graph. - pub fn into_inner(self) -> G { - self.graph - } -} - -impl<G: Visitable + NodeIndexable> Acyclic<G> -where - for<'a> &'a G: IntoNeighborsDirected + IntoNodeIdentifiers + GraphBase<NodeId = G::NodeId>, -{ - /// Wrap a graph into an acyclic graph. - /// - /// The graph types [`DiGraph`] and [`StableDiGraph`] also implement - /// [`TryFrom`], which can be used instead of this method and have looser - /// type bounds. - pub fn try_from_graph(graph: G) -> Result<Self, Cycle<G::NodeId>> { - let order_map = OrderMap::try_from_graph(&graph)?; - let discovered = RefCell::new(FixedBitSet::with_capacity(graph.node_bound())); - let finished = RefCell::new(FixedBitSet::with_capacity(graph.node_bound())); - Ok(Self { - graph, - order_map, - discovered, - finished, - }) - } - - /// Add an edge to the graph using [`Build::add_edge`]. - /// - /// Returns the id of the added edge, or an [`AcyclicEdgeError`] if the edge - /// would create a cycle, a self-loop or if the edge addition failed in - /// the underlying graph. - /// - /// In cases where edge addition cannot fail in the underlying graph (e.g. - /// when multi-edges are allowed, as in [`DiGraph`] and [`StableDiGraph`]), - /// this will return an error if and only if [`Self::is_valid_edge`] - /// returns `false`. - pub fn try_add_edge( - &mut self, - a: G::NodeId, - b: G::NodeId, - weight: G::EdgeWeight, - ) -> Result<G::EdgeId, AcyclicEdgeError<G::NodeId>> - where - G: Build, - G::NodeId: IndexType, - { - if a == b { - // No self-loops allowed - return Err(AcyclicEdgeError::SelfLoop); - } - self.update_ordering(a, b)?; - self.graph - .add_edge(a, b, weight) - .ok_or(AcyclicEdgeError::InvalidEdge) - } - - /// Update an edge in a graph using [`Build::update_edge`]. - /// - /// Returns the id of the updated edge, or an [`AcyclicEdgeError`] if the edge - /// would create a cycle or a self-loop. If the edge does not exist, the - /// edge is created. - /// - /// This will return an error if and only if [`Self::is_valid_edge`] returns - /// `false`. - pub fn try_update_edge( - &mut self, - a: G::NodeId, - b: G::NodeId, - weight: G::EdgeWeight, - ) -> Result<G::EdgeId, AcyclicEdgeError<G::NodeId>> - where - G: Build, - G::NodeId: IndexType, - { - if a == b { - // No self-loops allowed - return Err(AcyclicEdgeError::SelfLoop); - } - self.update_ordering(a, b)?; - Ok(self.graph.update_edge(a, b, weight)) - } - - /// Check if an edge would be valid, i.e. adding it would not create a cycle. - pub fn is_valid_edge(&self, a: G::NodeId, b: G::NodeId) -> bool - where - G::NodeId: IndexType, - { - if a == b { - false // No self-loops - } else if self.get_position(a) < self.get_position(b) { - true // valid edge in the current topological order - } else { - // Check if the future of `b` is disjoint from the past of `a` - // (in which case the topological order could be adjusted) - self.causal_cones(b, a).is_ok() - } - } - - /// Update the ordering of the nodes in the order map resulting from adding an - /// edge a -> b. - /// - /// If a cycle is detected, an error is returned and `self` remains unchanged. - /// - /// Implements the core update logic of the PK algorithm. - fn update_ordering(&mut self, a: G::NodeId, b: G::NodeId) -> Result<(), Cycle<G::NodeId>> - where - G::NodeId: IndexType, - { - let min_order = self.get_position(b); - let max_order = self.get_position(a); - if min_order >= max_order { - // Order is already correct - return Ok(()); - } - - // Get the nodes reachable from `b` and the nodes that can reach `a` - // between `min_order` and `max_order` - let (b_fut, a_past) = self.causal_cones(b, a)?; - - // Now reorder of nodes in a_past and b_fut such that - // i) within each vec, the nodes are in topological order, - // ii) all elements of b_fut come before all elements of a_past in the new order. - let all_positions: BTreeSet<_> = b_fut.keys().chain(a_past.keys()).copied().collect(); - let all_nodes = a_past.values().chain(b_fut.values()).copied(); - - debug_assert_eq!(all_positions.len(), b_fut.len() + a_past.len()); - - for (pos, node) in all_positions.into_iter().zip(all_nodes) { - self.order_map.set_position(node, pos, &self.graph); - } - Ok(()) - } - - /// Use DFS to find the future causal cone of `min_node` and the past causal - /// cone of `max_node`. - /// - /// The cones are trimmed to the range `[min_order, max_order]`. The cones - /// are returned if they are disjoint. Otherwise, a [`Cycle`] error is returned. - /// - /// If `return_result` is false, then the cones are not constructed and the - /// method only checks for disjointness. - #[allow(clippy::type_complexity)] - fn causal_cones( - &self, - min_node: G::NodeId, - max_node: G::NodeId, - ) -> Result< - ( - BTreeMap<TopologicalPosition, G::NodeId>, - BTreeMap<TopologicalPosition, G::NodeId>, - ), - Cycle<G::NodeId>, - > - where - G::NodeId: IndexType, - { - debug_assert!(self.discovered.borrow().is_clear()); - debug_assert!(self.finished.borrow().is_clear()); - - let min_order = self.get_position(min_node); - let max_order = self.get_position(max_node); - - // Prepare DFS scratch space: make sure the maps have enough capacity - if self.discovered.borrow().len() < self.graph.node_bound() { - self.discovered.borrow_mut().grow(self.graph.node_bound()); - self.finished.borrow_mut().grow(self.graph.node_bound()); - } - - // Get all nodes reachable from b with min_order <= order < max_order - let mut forward_cone = BTreeMap::new(); - let mut backward_cone = BTreeMap::new(); - - // The main logic: run DFS twice. We run this in a closure to catch - // errors and reset the maps properly at the end. - let mut run_dfs = || { - // Get all nodes reachable from min_node with min_order < order <= max_order - self.future_cone(min_node, min_order, max_order, &mut forward_cone)?; - - // Get all nodes that can reach a with min_order < order <= max_order - // These are disjoint from the nodes in the forward cone, otherwise - // we would have a cycle. - self.past_cone(max_node, min_order, max_order, &mut backward_cone) - .expect("cycles already detected in future_cone"); - - Ok(()) - }; - - let success = run_dfs(); - - // Cleanup: reset map to 0. This is faster than a full reset, especially - // on large sparse graphs. - for &v in forward_cone.values().chain(backward_cone.values()) { - self.discovered.borrow_mut().set(v.index(), false); - self.finished.borrow_mut().set(v.index(), false); - } - debug_assert!(self.discovered.borrow().is_clear()); - debug_assert!(self.finished.borrow().is_clear()); - - match success { - Ok(()) => Ok((forward_cone, backward_cone)), - Err(cycle) => Err(cycle), - } - } - - fn future_cone( - &self, - start: G::NodeId, - min_position: TopologicalPosition, - max_position: TopologicalPosition, - res: &mut BTreeMap<TopologicalPosition, G::NodeId>, - ) -> Result<(), Cycle<G::NodeId>> - where - G::NodeId: IndexType, - { - dfs( - &self.graph, - start, - &self.order_map, - |order| { - debug_assert!(order >= min_position, "invalid topological order"); - match order.cmp(&max_position) { - Ordering::Less => Ok(true), // node within [min_node, max_node] - Ordering::Equal => Err(Cycle(start)), // cycle! - Ordering::Greater => Ok(false), // node beyond [min_node, max_node] - } - }, - res, - &mut self.discovered.borrow_mut(), - &mut self.finished.borrow_mut(), - ) - } - - fn past_cone( - &self, - start: G::NodeId, - min_position: TopologicalPosition, - max_position: TopologicalPosition, - res: &mut BTreeMap<TopologicalPosition, G::NodeId>, - ) -> Result<(), Cycle<G::NodeId>> - where - G::NodeId: IndexType, - { - dfs( - Reversed(&self.graph), - start, - &self.order_map, - |order| { - debug_assert!(order <= max_position, "invalid topological order"); - match order.cmp(&min_position) { - Ordering::Less => Ok(false), // node beyond [min_node, max_node] - Ordering::Equal => panic!("found by future_cone"), // cycle! - Ordering::Greater => Ok(true), // node within [min_node, max_node] - } - }, - res, - &mut self.discovered.borrow_mut(), - &mut self.finished.borrow_mut(), - ) - } -} - -impl<G: Visitable> GraphBase for Acyclic<G> { - type NodeId = G::NodeId; - type EdgeId = G::EdgeId; -} - -impl<G: Default + Visitable> Default for Acyclic<G> { - fn default() -> Self { - let graph: G = Default::default(); - let order_map = Default::default(); - let discovered = RefCell::new(FixedBitSet::default()); - let finished = RefCell::new(FixedBitSet::default()); - Self { - graph, - order_map, - discovered, - finished, - } - } -} - -impl<G: Build + Visitable + NodeIndexable> Build for Acyclic<G> -where - for<'a> &'a G: IntoNeighborsDirected - + IntoNodeIdentifiers - + Visitable<Map = G::Map> - + GraphBase<NodeId = G::NodeId>, - G::NodeId: IndexType, -{ - fn add_node(&mut self, weight: Self::NodeWeight) -> Self::NodeId { - let n = self.graph.add_node(weight); - self.order_map.add_node(n, &self.graph); - n - } - - fn add_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Option<Self::EdgeId> { - self.try_add_edge(a, b, weight).ok() - } - - fn update_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Self::EdgeId { - self.try_update_edge(a, b, weight).unwrap() - } -} - -impl<G: Create + Visitable + NodeIndexable> Create for Acyclic<G> -where - for<'a> &'a G: IntoNeighborsDirected - + IntoNodeIdentifiers - + Visitable<Map = G::Map> - + GraphBase<NodeId = G::NodeId>, - G::NodeId: IndexType, -{ - fn with_capacity(nodes: usize, edges: usize) -> Self { - let graph = G::with_capacity(nodes, edges); - let order_map = OrderMap::with_capacity(nodes); - let discovered = FixedBitSet::with_capacity(nodes); - let finished = FixedBitSet::with_capacity(nodes); - Self { - graph, - order_map, - discovered: RefCell::new(discovered), - finished: RefCell::new(finished), - } - } -} - -impl<G: Visitable> Deref for Acyclic<G> { - type Target = G; - - fn deref(&self) -> &Self::Target { - &self.graph - } -} - -/// Traverse nodes in `graph` in DFS order, starting from `start`, for as long -/// as the predicate `valid_order` returns `true` on the current node's order. -fn dfs<G: NodeIndexable + IntoNeighborsDirected + IntoNodeIdentifiers + Visitable>( - graph: G, - start: G::NodeId, - order_map: &OrderMap<G::NodeId>, - // A predicate that returns whether to continue the search from a node, - // or an error to stop and shortcircuit the search. - mut valid_order: impl FnMut(TopologicalPosition) -> Result<bool, Cycle<G::NodeId>>, - res: &mut BTreeMap<TopologicalPosition, G::NodeId>, - discovered: &mut FixedBitSet, - finished: &mut FixedBitSet, -) -> Result<(), Cycle<G::NodeId>> -where - G::NodeId: IndexType, -{ - dfs_visitor( - graph, - start, - &mut |ev| -> Result<Control<()>, Cycle<G::NodeId>> { - match ev { - DfsEvent::Discover(u, _) => { - // We are visiting u - let order = order_map.get_position(u, &graph); - res.insert(order, u); - Ok(Control::Continue) - } - DfsEvent::TreeEdge(_, u) => { - // Should we visit u? - let order = order_map.get_position(u, &graph); - match valid_order(order) { - Ok(true) => Ok(Control::Continue), - Ok(false) => Ok(Control::Prune), - Err(cycle) => Err(cycle), - } - } - _ => Ok(Control::Continue), - } - }, - discovered, - finished, - &mut Time::default(), - )?; - - Ok(()) -} - -/////////////////////// Pass-through graph traits /////////////////////// -// We implement all the following traits by delegating to the inner graph: -// - Data -// - DataMap -// - DataMapMut -// - EdgeCount -// - EdgeIndexable -// - GetAdjacencyMatrix -// - GraphProp -// - NodeCompactIndexable -// - NodeCount -// - NodeIndexable -// - Visitable -// -// Furthermore, we also implement the `remove_node` and `remove_edge` methods, -// as well as the following traits for `DiGraph` and `StableDiGraph` (these -// are hard/impossible to implement generically): -// - TryFrom -// - IntoEdgeReferences -// - IntoEdges -// - IntoEdgesDirected -// - IntoNeighbors -// - IntoNeighborsDirected -// - IntoNodeIdentifiers -// - IntoNodeReferences - -impl<G: Visitable + Data> Data for Acyclic<G> { - type NodeWeight = G::NodeWeight; - type EdgeWeight = G::EdgeWeight; -} - -impl<G: Visitable + DataMap> DataMap for Acyclic<G> { - fn node_weight(&self, id: Self::NodeId) -> Option<&Self::NodeWeight> { - self.inner().node_weight(id) - } - - fn edge_weight(&self, id: Self::EdgeId) -> Option<&Self::EdgeWeight> { - self.inner().edge_weight(id) - } -} - -impl<G: Visitable + DataMapMut> DataMapMut for Acyclic<G> { - fn node_weight_mut(&mut self, id: Self::NodeId) -> Option<&mut Self::NodeWeight> { - self.inner_mut().node_weight_mut(id) - } - - fn edge_weight_mut(&mut self, id: Self::EdgeId) -> Option<&mut Self::EdgeWeight> { - self.inner_mut().edge_weight_mut(id) - } -} - -impl<G: Visitable + EdgeCount> EdgeCount for Acyclic<G> { - fn edge_count(&self) -> usize { - self.inner().edge_count() - } -} - -impl<G: Visitable + EdgeIndexable> EdgeIndexable for Acyclic<G> { - fn edge_bound(&self) -> usize { - self.inner().edge_bound() - } - - fn to_index(&self, a: Self::EdgeId) -> usize { - self.inner().to_index(a) - } - - fn from_index(&self, i: usize) -> Self::EdgeId { - self.inner().from_index(i) - } -} - -impl<G: Visitable + GetAdjacencyMatrix> GetAdjacencyMatrix for Acyclic<G> { - type AdjMatrix = G::AdjMatrix; - - fn adjacency_matrix(&self) -> Self::AdjMatrix { - self.inner().adjacency_matrix() - } - - fn is_adjacent(&self, matrix: &Self::AdjMatrix, a: Self::NodeId, b: Self::NodeId) -> bool { - self.inner().is_adjacent(matrix, a, b) - } -} - -impl<G: Visitable + GraphProp> GraphProp for Acyclic<G> { - type EdgeType = G::EdgeType; -} - -impl<G: Visitable + NodeCompactIndexable> NodeCompactIndexable for Acyclic<G> {} - -impl<G: Visitable + NodeCount> NodeCount for Acyclic<G> { - fn node_count(&self) -> usize { - self.inner().node_count() - } -} - -impl<G: Visitable + NodeIndexable> NodeIndexable for Acyclic<G> { - fn node_bound(&self) -> usize { - self.inner().node_bound() - } - - fn to_index(&self, a: Self::NodeId) -> usize { - self.inner().to_index(a) - } - - fn from_index(&self, i: usize) -> Self::NodeId { - self.inner().from_index(i) - } -} - -impl<G: Visitable> Visitable for Acyclic<G> { - type Map = G::Map; - - fn visit_map(&self) -> Self::Map { - self.inner().visit_map() - } - - fn reset_map(&self, map: &mut Self::Map) { - self.inner().reset_map(map) - } -} - -macro_rules! impl_graph_traits { - ($graph_type:ident) => { - // Remove edge and node methods (not available through traits) - impl<N, E, Ix: IndexType> Acyclic<$graph_type<N, E, Ix>> { - /// Remove an edge and return its edge weight, or None if it didn't exist. - /// - /// Pass through to underlying graph. - pub fn remove_edge( - &mut self, - e: <$graph_type<N, E, Ix> as GraphBase>::EdgeId, - ) -> Option<E> { - self.graph.remove_edge(e) - } - - /// Remove a node from the graph if it exists, and return its - /// weight. If it doesn't exist in the graph, return None. - /// - /// This updates the order in O(v) runtime and removes the node in - /// the underlying graph. - pub fn remove_node( - &mut self, - n: <$graph_type<N, E, Ix> as GraphBase>::NodeId, - ) -> Option<N> { - self.order_map.remove_node(n, &self.graph); - self.graph.remove_node(n) - } - } - - impl<N, E, Ix: IndexType> TryFrom<$graph_type<N, E, Ix>> - for Acyclic<$graph_type<N, E, Ix>> - { - type Error = Cycle<NodeIndex<Ix>>; - - fn try_from(graph: $graph_type<N, E, Ix>) -> Result<Self, Self::Error> { - let order_map = OrderMap::try_from_graph(&graph)?; - let discovered = RefCell::new(FixedBitSet::with_capacity(graph.node_bound())); - let finished = RefCell::new(FixedBitSet::with_capacity(graph.node_bound())); - Ok(Self { - graph, - order_map, - discovered, - finished, - }) - } - } - - impl<'a, N, E, Ix: IndexType> IntoEdgeReferences for &'a Acyclic<$graph_type<N, E, Ix>> { - type EdgeRef = <&'a $graph_type<N, E, Ix> as IntoEdgeReferences>::EdgeRef; - type EdgeReferences = <&'a $graph_type<N, E, Ix> as IntoEdgeReferences>::EdgeReferences; - - fn edge_references(self) -> Self::EdgeReferences { - self.inner().edge_references() - } - } - - impl<'a, N, E, Ix: IndexType> IntoEdges for &'a Acyclic<$graph_type<N, E, Ix>> { - type Edges = <&'a $graph_type<N, E, Ix> as IntoEdges>::Edges; - - fn edges(self, a: Self::NodeId) -> Self::Edges { - self.inner().edges(a) - } - } - - impl<'a, N, E, Ix: IndexType> IntoEdgesDirected for &'a Acyclic<$graph_type<N, E, Ix>> { - type EdgesDirected = <&'a $graph_type<N, E, Ix> as IntoEdgesDirected>::EdgesDirected; - - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::EdgesDirected { - self.inner().edges_directed(a, dir) - } - } - - impl<'a, N, E, Ix: IndexType> IntoNeighbors for &'a Acyclic<$graph_type<N, E, Ix>> { - type Neighbors = <&'a $graph_type<N, E, Ix> as IntoNeighbors>::Neighbors; - - fn neighbors(self, a: Self::NodeId) -> Self::Neighbors { - self.inner().neighbors(a) - } - } - - impl<'a, N, E, Ix: IndexType> IntoNeighborsDirected for &'a Acyclic<$graph_type<N, E, Ix>> { - type NeighborsDirected = - <&'a $graph_type<N, E, Ix> as IntoNeighborsDirected>::NeighborsDirected; - - fn neighbors_directed(self, n: Self::NodeId, d: Direction) -> Self::NeighborsDirected { - self.inner().neighbors_directed(n, d) - } - } - - impl<'a, N, E, Ix: IndexType> IntoNodeIdentifiers for &'a Acyclic<$graph_type<N, E, Ix>> { - type NodeIdentifiers = - <&'a $graph_type<N, E, Ix> as IntoNodeIdentifiers>::NodeIdentifiers; - - fn node_identifiers(self) -> Self::NodeIdentifiers { - self.inner().node_identifiers() - } - } - - impl<'a, N, E, Ix: IndexType> IntoNodeReferences for &'a Acyclic<$graph_type<N, E, Ix>> { - type NodeRef = <&'a $graph_type<N, E, Ix> as IntoNodeReferences>::NodeRef; - type NodeReferences = <&'a $graph_type<N, E, Ix> as IntoNodeReferences>::NodeReferences; - - fn node_references(self) -> Self::NodeReferences { - self.inner().node_references() - } - } - }; -} - -impl_graph_traits!(DiGraph); -#[cfg(feature = "stable_graph")] -impl_graph_traits!(StableDiGraph); - -#[cfg(test)] -mod tests { - use super::*; - use crate::prelude::DiGraph; - #[cfg(feature = "stable_graph")] - use crate::prelude::StableDiGraph; - use crate::visit::IntoNodeReferences; - - #[test] - fn test_acyclic_graph() { - // Create an acyclic DiGraph - let mut graph = DiGraph::<(), ()>::new(); - let a = graph.add_node(()); - let c = graph.add_node(()); - let b = graph.add_node(()); - graph.add_edge(a, b, ()); - graph.add_edge(b, c, ()); - - // Create an Acyclic object - let mut acyclic = Acyclic::try_from_graph(graph).unwrap(); - - // Test initial topological order - assert_valid_topological_order(&acyclic); - - // Add a valid edge - assert!(acyclic.try_add_edge(a, c, ()).is_ok()); - assert_valid_topological_order(&acyclic); - - // Try to add an edge that would create a cycle - assert!(acyclic.try_add_edge(c, a, ()).is_err()); - - // Add another valid edge - let d = acyclic.add_node(()); - assert!(acyclic.try_add_edge(c, d, ()).is_ok()); - assert_valid_topological_order(&acyclic); - - // Try to add an edge that would create a cycle (using the Build trait) - assert!(acyclic.add_edge(d, a, ()).is_none()); - } - - #[cfg(feature = "stable_graph")] - #[test] - fn test_acyclic_graph_add_remove() { - // Create an initial Acyclic graph with two nodes and one edge - let mut acyclic = Acyclic::<StableDiGraph<(), ()>>::new(); - let a = acyclic.add_node(()); - let b = acyclic.add_node(()); - assert!(acyclic.try_add_edge(a, b, ()).is_ok()); - - // Check initial topological order - assert_valid_topological_order(&acyclic); - - // Add a new node and an edge - let c = acyclic.add_node(()); - assert!(acyclic.try_add_edge(b, c, ()).is_ok()); - - // Check topological order after addition - assert_valid_topological_order(&acyclic); - - // Remove the node connected to two edges (node b) - acyclic.remove_node(b); - - // Check topological order after removal - assert_valid_topological_order(&acyclic); - - // Verify the remaining structure - let remaining_nodes: Vec<_> = acyclic - .inner() - .node_references() - .map(|(id, _)| id) - .collect(); - assert_eq!(remaining_nodes.len(), 2); - assert!(remaining_nodes.contains(&a)); - assert!(remaining_nodes.contains(&c)); - assert!(!acyclic.inner().contains_edge(a, c)); - } - - fn assert_valid_topological_order<'a, G>(acyclic: &'a Acyclic<G>) - where - G: Visitable + NodeCount + NodeIndexable, - &'a G: NodeIndexable - + IntoNodeReferences - + IntoNeighborsDirected - + GraphBase<NodeId = G::NodeId>, - G::NodeId: std::fmt::Debug, - { - let ordered_nodes: Vec<_> = acyclic.nodes_iter().collect(); - assert_eq!(ordered_nodes.len(), acyclic.node_count()); - let nodes: Vec<_> = acyclic.inner().node_identifiers().collect(); - - // Check that the nodes are in topological order - let mut last_position = None; - for (idx, &node) in ordered_nodes.iter().enumerate() { - assert!(nodes.contains(&node)); - - // Check that the node positions are monotonically increasing - let pos = acyclic.get_position(node); - assert!(Some(pos) > last_position); - last_position = Some(pos); - - // Check that the neighbors are in the future of the current node - for neighbor in acyclic.inner().neighbors(node) { - let neighbour_idx = ordered_nodes.iter().position(|&n| n == neighbor).unwrap(); - assert!(neighbour_idx > idx); - } - } - } -} diff --git a/vendor/petgraph/src/acyclic/order_map.rs b/vendor/petgraph/src/acyclic/order_map.rs deleted file mode 100644 index 4938041a..00000000 --- a/vendor/petgraph/src/acyclic/order_map.rs +++ /dev/null @@ -1,193 +0,0 @@ -//! A bijective map between node indices and a `TopologicalPosition`, to store -//! the total topological order of the graph. -//! -//! This data structure is an implementation detail and is not exposed in the -//! public API. -use std::{collections::BTreeMap, fmt, ops::RangeBounds}; - -use crate::{ - algo::{toposort, Cycle}, - visit::{GraphBase, IntoNeighborsDirected, IntoNodeIdentifiers, NodeIndexable, Visitable}, -}; - -/// A position in the topological order of the graph. -/// -/// This defines a total order over the set of nodes in the graph. -/// -/// Note that the positions of all nodes in a graph may not form a contiguous -/// interval. -#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Default)] -#[repr(transparent)] -pub struct TopologicalPosition(pub(super) usize); - -/// A bijective map between node indices and their position in a topological order. -/// -/// Note that this map does not check for injectivity or surjectivity, this -/// must be enforced by the user. Map mutations that invalidate these properties -/// are allowed to make it easy to perform batch modifications that temporarily -/// break the invariants. -#[derive(Clone)] -pub(super) struct OrderMap<N> { - /// Map topological position to node index. - pos_to_node: BTreeMap<TopologicalPosition, N>, - /// The inverse of `pos_to_node`, i.e. map node indices to their position. - /// - /// This is a Vec, relying on `N: NodeIndexable` for indexing. - node_to_pos: Vec<TopologicalPosition>, -} - -impl<N> Default for OrderMap<N> { - fn default() -> Self { - Self { - pos_to_node: Default::default(), - node_to_pos: Default::default(), - } - } -} - -impl<N: fmt::Debug> fmt::Debug for OrderMap<N> { - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { - f.debug_struct("OrderMap") - .field("order", &self.pos_to_node) - .finish() - } -} - -impl<N: Copy> OrderMap<N> { - pub(super) fn try_from_graph<G>(graph: G) -> Result<Self, Cycle<G::NodeId>> - where - G: NodeIndexable<NodeId = N> + IntoNeighborsDirected + IntoNodeIdentifiers + Visitable, - { - // Compute the topological order. - let topo_vec = toposort(graph, None)?; - - // Create the two map directions. - let mut pos_to_node = BTreeMap::new(); - let mut node_to_pos = vec![TopologicalPosition::default(); graph.node_bound()]; - - // Populate the maps. - for (i, &id) in topo_vec.iter().enumerate() { - let pos = TopologicalPosition(i); - pos_to_node.insert(pos, id); - node_to_pos[graph.to_index(id)] = pos; - } - - Ok(Self { - pos_to_node, - node_to_pos, - }) - } - - pub(super) fn with_capacity(nodes: usize) -> Self { - Self { - pos_to_node: BTreeMap::new(), - node_to_pos: Vec::with_capacity(nodes), - } - } - - /// Map a node to its position in the topological order. - /// - /// Panics if the node index is out of bounds. - pub(super) fn get_position( - &self, - id: N, - graph: impl NodeIndexable<NodeId = N>, - ) -> TopologicalPosition { - let idx = graph.to_index(id); - assert!(idx < self.node_to_pos.len()); - self.node_to_pos[idx] - } - - /// Map a position in the topological order to a node, if it exists. - pub(super) fn at_position(&self, pos: TopologicalPosition) -> Option<N> { - self.pos_to_node.get(&pos).copied() - } - - /// Get an iterator over the nodes, ordered by their position. - pub(super) fn nodes_iter(&self) -> impl Iterator<Item = N> + '_ { - self.pos_to_node.values().copied() - } - - /// Get an iterator over the nodes within the range of positions. - pub(super) fn range( - &self, - range: impl RangeBounds<TopologicalPosition>, - ) -> impl Iterator<Item = N> + '_ { - self.pos_to_node.range(range).map(|(_, &n)| n) - } - - /// Add a node to the order map and assign it an arbitrary position. - /// - /// Return the position of the new node. - pub(super) fn add_node( - &mut self, - id: N, - graph: impl NodeIndexable<NodeId = N>, - ) -> TopologicalPosition { - // The position and node index - let new_pos = self - .pos_to_node - .iter() - .next_back() - .map(|(TopologicalPosition(idx), _)| TopologicalPosition(idx + 1)) - .unwrap_or_default(); - let idx = graph.to_index(id); - - // Make sure the order_inv is large enough. - if idx >= self.node_to_pos.len() { - self.node_to_pos - .resize(graph.node_bound(), TopologicalPosition::default()); - } - - // Insert both map directions. - self.pos_to_node.insert(new_pos, id); - self.node_to_pos[idx] = new_pos; - - new_pos - } - - /// Remove a node from the order map. - /// - /// Panics if the node index is out of bounds. - pub(super) fn remove_node(&mut self, id: N, graph: impl NodeIndexable<NodeId = N>) { - let idx = graph.to_index(id); - assert!(idx < self.node_to_pos.len()); - - let pos = self.node_to_pos[idx]; - self.node_to_pos[idx] = TopologicalPosition::default(); - self.pos_to_node.remove(&pos); - } - - /// Set the position of a node. - /// - /// Panics if the node index is out of bounds. - pub(super) fn set_position( - &mut self, - id: N, - pos: TopologicalPosition, - graph: impl NodeIndexable<NodeId = N>, - ) { - let idx = graph.to_index(id); - assert!(idx < self.node_to_pos.len()); - - self.pos_to_node.insert(pos, id); - self.node_to_pos[idx] = pos; - } -} - -impl<G: Visitable> super::Acyclic<G> { - /// Get the position of a node in the topological sort. - /// - /// Panics if the node index is out of bounds. - pub fn get_position<'a>(&'a self, id: G::NodeId) -> TopologicalPosition - where - &'a G: NodeIndexable + GraphBase<NodeId = G::NodeId>, - { - self.order_map.get_position(id, &self.graph) - } - - /// Get the node at a given position in the topological sort, if it exists. - pub fn at_position(&self, pos: TopologicalPosition) -> Option<G::NodeId> { - self.order_map.at_position(pos) - } -} diff --git a/vendor/petgraph/src/adj.rs b/vendor/petgraph/src/adj.rs deleted file mode 100644 index 0d107bfc..00000000 --- a/vendor/petgraph/src/adj.rs +++ /dev/null @@ -1,653 +0,0 @@ -//! Simple adjacency list. -use crate::data::{Build, DataMap, DataMapMut}; -use crate::iter_format::NoPretty; -use crate::visit::{ - self, EdgeCount, EdgeRef, GetAdjacencyMatrix, IntoEdgeReferences, IntoNeighbors, NodeCount, -}; -use fixedbitset::FixedBitSet; -use std::fmt; -use std::ops::Range; - -#[doc(no_inline)] -pub use crate::graph::{DefaultIx, IndexType}; - -/// Adjacency list node index type, a plain integer. -pub type NodeIndex<Ix = DefaultIx> = Ix; - -/// Adjacency list edge index type, a pair of integers. -#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)] -pub struct EdgeIndex<Ix = DefaultIx> -where - Ix: IndexType, -{ - /// Source of the edge. - from: NodeIndex<Ix>, - /// Index of the sucessor in the successor list. - successor_index: usize, -} - -iterator_wrap! { -impl (Iterator) for -/// An Iterator over the indices of the outgoing edges from a node. -/// -/// It does not borrow the graph during iteration. -#[derive(Debug, Clone)] -struct OutgoingEdgeIndices <Ix> where { Ix: IndexType } -item: EdgeIndex<Ix>, -iter: std::iter::Map<std::iter::Zip<Range<usize>, std::iter::Repeat<NodeIndex<Ix>>>, fn((usize, NodeIndex<Ix>)) -> EdgeIndex<Ix>>, -} - -/// Weighted sucessor -#[derive(Clone, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)] -struct WSuc<E, Ix: IndexType> { - /// Index of the sucessor. - suc: Ix, - /// Weight of the edge to `suc`. - weight: E, -} - -/// One row of the adjacency list. -type Row<E, Ix> = Vec<WSuc<E, Ix>>; -type RowIter<'a, E, Ix> = std::slice::Iter<'a, WSuc<E, Ix>>; - -iterator_wrap! { -impl (Iterator DoubleEndedIterator ExactSizeIterator) for -/// An iterator over the indices of the neighbors of a node. -#[derive(Debug, Clone)] -struct Neighbors<'a, E, Ix> where { Ix: IndexType } -item: NodeIndex<Ix>, -iter: std::iter::Map<RowIter<'a, E, Ix>, fn(&WSuc<E, Ix>) -> NodeIndex<Ix>>, -} - -/// A reference to an edge of the graph. -#[derive(Debug, Eq, PartialEq, Ord, PartialOrd)] -pub struct EdgeReference<'a, E, Ix: IndexType> { - /// index of the edge - id: EdgeIndex<Ix>, - /// a reference to the corresponding item in the adjacency list - edge: &'a WSuc<E, Ix>, -} - -impl<E, Ix: IndexType> Copy for EdgeReference<'_, E, Ix> {} -impl<E, Ix: IndexType> Clone for EdgeReference<'_, E, Ix> { - fn clone(&self) -> Self { - *self - } -} - -impl<E, Ix: IndexType> visit::EdgeRef for EdgeReference<'_, E, Ix> { - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex<Ix>; - type Weight = E; - fn source(&self) -> Self::NodeId { - self.id.from - } - fn target(&self) -> Self::NodeId { - self.edge.suc - } - fn id(&self) -> Self::EdgeId { - self.id - } - fn weight(&self) -> &Self::Weight { - &self.edge.weight - } -} - -#[derive(Debug, Clone)] -pub struct EdgeIndices<'a, E, Ix: IndexType> { - rows: std::iter::Enumerate<std::slice::Iter<'a, Row<E, Ix>>>, - row_index: usize, - row_len: usize, - cur: usize, -} - -impl<E, Ix: IndexType> Iterator for EdgeIndices<'_, E, Ix> { - type Item = EdgeIndex<Ix>; - fn next(&mut self) -> Option<EdgeIndex<Ix>> { - loop { - if self.cur < self.row_len { - let res = self.cur; - self.cur += 1; - return Some(EdgeIndex { - from: Ix::new(self.row_index), - successor_index: res, - }); - } else { - match self.rows.next() { - Some((index, row)) => { - self.row_index = index; - self.cur = 0; - self.row_len = row.len(); - } - None => return None, - } - } - } - } -} - -iterator_wrap! { - impl (Iterator DoubleEndedIterator ExactSizeIterator) for - /// An iterator over all node indices in the graph. - #[derive(Debug, Clone)] - struct NodeIndices <Ix> where {} - item: Ix, - iter: std::iter::Map<Range<usize>, fn(usize) -> Ix>, -} - -/// An adjacency list with labeled edges. -/// -/// Can be interpreted as a directed graph -/// with unweighted nodes. -/// -/// This is the most simple adjacency list you can imagine. [`Graph`](../graph/struct.Graph.html), in contrast, -/// maintains both the list of successors and predecessors for each node, -/// which is a different trade-off. -/// -/// Allows parallel edges and self-loops. -/// -/// This data structure is append-only (except for [`clear`](#method.clear)), so indices -/// returned at some point for a given graph will stay valid with this same -/// graph until it is dropped or [`clear`](#method.clear) is called. -/// -/// Space consumption: **O(|E|)**. -#[derive(Clone, Default)] -pub struct List<E, Ix = DefaultIx> -where - Ix: IndexType, -{ - suc: Vec<Row<E, Ix>>, -} - -impl<E, Ix: IndexType> List<E, Ix> { - /// Creates a new, empty adjacency list. - pub fn new() -> List<E, Ix> { - List { suc: Vec::new() } - } - - /// Creates a new, empty adjacency list tailored for `nodes` nodes. - pub fn with_capacity(nodes: usize) -> List<E, Ix> { - List { - suc: Vec::with_capacity(nodes), - } - } - - /// Removes all nodes and edges from the list. - pub fn clear(&mut self) { - self.suc.clear() - } - - /// Returns the number of edges in the list - /// - /// Computes in **O(|V|)** time. - pub fn edge_count(&self) -> usize { - self.suc.iter().map(|x| x.len()).sum() - } - - /// Adds a new node to the list. This allocates a new `Vec` and then should - /// run in amortized **O(1)** time. - pub fn add_node(&mut self) -> NodeIndex<Ix> { - let i = self.suc.len(); - self.suc.push(Vec::new()); - Ix::new(i) - } - - /// Adds a new node to the list. This allocates a new `Vec` and then should - /// run in amortized **O(1)** time. - pub fn add_node_with_capacity(&mut self, successors: usize) -> NodeIndex<Ix> { - let i = self.suc.len(); - self.suc.push(Vec::with_capacity(successors)); - Ix::new(i) - } - - /// Adds a new node to the list by giving its list of successors and the corresponding - /// weigths. - pub fn add_node_from_edges<I: Iterator<Item = (NodeIndex<Ix>, E)>>( - &mut self, - edges: I, - ) -> NodeIndex<Ix> { - let i = self.suc.len(); - self.suc - .push(edges.map(|(suc, weight)| WSuc { suc, weight }).collect()); - Ix::new(i) - } - - /// Add an edge from `a` to `b` to the graph, with its associated - /// data `weight`. - /// - /// Return the index of the new edge. - /// - /// Computes in **O(1)** time. - /// - /// **Panics** if the source node does not exist.<br> - /// - /// **Note:** `List` allows adding parallel (“duplicate”) edges. If you want - /// to avoid this, use [`.update_edge(a, b, weight)`](#method.update_edge) instead. - pub fn add_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> EdgeIndex<Ix> { - if b.index() >= self.suc.len() { - panic!( - "{} is not a valid node index for a {} nodes adjacency list", - b.index(), - self.suc.len() - ); - } - let row = &mut self.suc[a.index()]; - let rank = row.len(); - row.push(WSuc { suc: b, weight }); - EdgeIndex { - from: a, - successor_index: rank, - } - } - - fn get_edge(&self, e: EdgeIndex<Ix>) -> Option<&WSuc<E, Ix>> { - self.suc - .get(e.from.index()) - .and_then(|row| row.get(e.successor_index)) - } - - fn get_edge_mut(&mut self, e: EdgeIndex<Ix>) -> Option<&mut WSuc<E, Ix>> { - self.suc - .get_mut(e.from.index()) - .and_then(|row| row.get_mut(e.successor_index)) - } - - /// Accesses the source and target of edge `e` - /// - /// Computes in **O(1)** - pub fn edge_endpoints(&self, e: EdgeIndex<Ix>) -> Option<(NodeIndex<Ix>, NodeIndex<Ix>)> { - self.get_edge(e).map(|x| (e.from, x.suc)) - } - - pub fn edge_indices_from(&self, a: NodeIndex<Ix>) -> OutgoingEdgeIndices<Ix> { - let proj: fn((usize, NodeIndex<Ix>)) -> EdgeIndex<Ix> = - |(successor_index, from)| EdgeIndex { - from, - successor_index, - }; - let iter = (0..(self.suc[a.index()].len())) - .zip(std::iter::repeat(a)) - .map(proj); - OutgoingEdgeIndices { iter } - } - - /// Lookups whether there is an edge from `a` to `b`. - /// - /// Computes in **O(e')** time, where **e'** is the number of successors of `a`. - pub fn contains_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - match self.suc.get(a.index()) { - None => false, - Some(row) => row.iter().any(|x| x.suc == b), - } - } - - /// Lookups whether there is an edge from `a` to `b`. - /// - /// Computes in **O(e')** time, where **e'** is the number of successors of `a`. - pub fn find_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> Option<EdgeIndex<Ix>> { - self.suc.get(a.index()).and_then(|row| { - row.iter() - .enumerate() - .find(|(_, x)| x.suc == b) - .map(|(i, _)| EdgeIndex { - from: a, - successor_index: i, - }) - }) - } - - /// Returns an iterator over all node indices of the graph. - /// - /// Consuming the whole iterator take **O(|V|)**. - pub fn node_indices(&self) -> NodeIndices<Ix> { - NodeIndices { - iter: (0..self.suc.len()).map(Ix::new), - } - } - - /// Returns an iterator over all edge indices of the graph. - /// - /// Consuming the whole iterator take **O(|V| + |E|)**. - pub fn edge_indices(&self) -> EdgeIndices<E, Ix> { - EdgeIndices { - rows: self.suc.iter().enumerate(), - row_index: 0, - row_len: 0, - cur: 0, - } - } -} - -/// A very simple adjacency list with no node or label weights. -pub type UnweightedList<Ix> = List<(), Ix>; - -impl<E, Ix: IndexType> Build for List<E, Ix> { - /// Adds a new node to the list. This allocates a new `Vec` and then should - /// run in amortized **O(1)** time. - fn add_node(&mut self, _weight: ()) -> NodeIndex<Ix> { - self.add_node() - } - - /// Add an edge from `a` to `b` to the graph, with its associated - /// data `weight`. - /// - /// Return the index of the new edge. - /// - /// Computes in **O(1)** time. - /// - /// **Panics** if the source node does not exist.<br> - /// - /// **Note:** `List` allows adding parallel (“duplicate”) edges. If you want - /// to avoid this, use [`.update_edge(a, b, weight)`](#method.update_edge) instead. - fn add_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> Option<EdgeIndex<Ix>> { - Some(self.add_edge(a, b, weight)) - } - - /// Updates or adds an edge from `a` to `b` to the graph, with its associated - /// data `weight`. - /// - /// Return the index of the new edge. - /// - /// Computes in **O(e')** time, where **e'** is the number of successors of `a`. - /// - /// **Panics** if the source node does not exist.<br> - fn update_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> EdgeIndex<Ix> { - let row = &mut self.suc[a.index()]; - for (i, info) in row.iter_mut().enumerate() { - if info.suc == b { - info.weight = weight; - return EdgeIndex { - from: a, - successor_index: i, - }; - } - } - let rank = row.len(); - row.push(WSuc { suc: b, weight }); - EdgeIndex { - from: a, - successor_index: rank, - } - } -} - -impl<E, Ix> fmt::Debug for EdgeReferences<'_, E, Ix> -where - E: fmt::Debug, - Ix: IndexType, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let mut edge_list = f.debug_list(); - let iter: Self = self.clone(); - for e in iter { - if std::mem::size_of::<E>() != 0 { - edge_list.entry(&( - NoPretty((e.source().index(), e.target().index())), - e.weight(), - )); - } else { - edge_list.entry(&NoPretty((e.source().index(), e.target().index()))); - } - } - edge_list.finish() - } -} - -impl<E, Ix> fmt::Debug for List<E, Ix> -where - E: fmt::Debug, - Ix: IndexType, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let mut fmt_struct = f.debug_struct("adj::List"); - fmt_struct.field("node_count", &self.node_count()); - fmt_struct.field("edge_count", &self.edge_count()); - if self.edge_count() > 0 { - fmt_struct.field("edges", &self.edge_references()); - } - fmt_struct.finish() - } -} - -impl<E, Ix> visit::GraphBase for List<E, Ix> -where - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex<Ix>; -} - -impl<E, Ix> visit::Visitable for List<E, Ix> -where - Ix: IndexType, -{ - type Map = FixedBitSet; - fn visit_map(&self) -> FixedBitSet { - FixedBitSet::with_capacity(self.node_count()) - } - fn reset_map(&self, map: &mut Self::Map) { - map.clear(); - map.grow(self.node_count()); - } -} - -impl<E, Ix: IndexType> visit::IntoNodeIdentifiers for &List<E, Ix> { - type NodeIdentifiers = NodeIndices<Ix>; - fn node_identifiers(self) -> NodeIndices<Ix> { - self.node_indices() - } -} - -impl<Ix: IndexType> visit::NodeRef for NodeIndex<Ix> { - type NodeId = NodeIndex<Ix>; - type Weight = (); - fn id(&self) -> Self::NodeId { - *self - } - fn weight(&self) -> &Self::Weight { - &() - } -} - -impl<Ix: IndexType, E> visit::IntoNodeReferences for &List<E, Ix> { - type NodeRef = NodeIndex<Ix>; - type NodeReferences = NodeIndices<Ix>; - fn node_references(self) -> Self::NodeReferences { - self.node_indices() - } -} - -impl<E, Ix: IndexType> visit::Data for List<E, Ix> { - type NodeWeight = (); - type EdgeWeight = E; -} - -impl<'a, E, Ix: IndexType> IntoNeighbors for &'a List<E, Ix> { - type Neighbors = Neighbors<'a, E, Ix>; - /// Returns an iterator of all nodes with an edge starting from `a`. - /// Panics if `a` is out of bounds. - /// Use [`List::edge_indices_from`] instead if you do not want to borrow the adjacency list while - /// iterating. - fn neighbors(self, a: NodeIndex<Ix>) -> Self::Neighbors { - let proj: fn(&WSuc<E, Ix>) -> NodeIndex<Ix> = |x| x.suc; - let iter = self.suc[a.index()].iter().map(proj); - Neighbors { iter } - } -} - -type SomeIter<'a, E, Ix> = std::iter::Map< - std::iter::Zip<std::iter::Enumerate<RowIter<'a, E, Ix>>, std::iter::Repeat<Ix>>, - fn(((usize, &'a WSuc<E, Ix>), Ix)) -> EdgeReference<'a, E, Ix>, ->; - -iterator_wrap! { -impl (Iterator) for -/// An iterator over the [`EdgeReference`] of all the edges of the graph. -struct EdgeReferences<'a, E, Ix> where { Ix: IndexType } -item: EdgeReference<'a, E, Ix>, -iter: std::iter::FlatMap< - std::iter::Enumerate< - std::slice::Iter<'a, Row<E, Ix>> - >, - SomeIter<'a, E, Ix>, - fn( - (usize, &'a Vec<WSuc<E, Ix>>) - ) -> SomeIter<'a, E, Ix>, ->, -} - -impl<E, Ix: IndexType> Clone for EdgeReferences<'_, E, Ix> { - fn clone(&self) -> Self { - EdgeReferences { - iter: self.iter.clone(), - } - } -} - -fn proj1<E, Ix: IndexType>( - ((successor_index, edge), from): ((usize, &WSuc<E, Ix>), Ix), -) -> EdgeReference<E, Ix> { - let id = EdgeIndex { - from, - successor_index, - }; - EdgeReference { id, edge } -} -fn proj2<E, Ix: IndexType>((row_index, row): (usize, &Vec<WSuc<E, Ix>>)) -> SomeIter<E, Ix> { - row.iter() - .enumerate() - .zip(std::iter::repeat(Ix::new(row_index))) - .map(proj1 as _) -} - -impl<'a, Ix: IndexType, E> visit::IntoEdgeReferences for &'a List<E, Ix> { - type EdgeRef = EdgeReference<'a, E, Ix>; - type EdgeReferences = EdgeReferences<'a, E, Ix>; - fn edge_references(self) -> Self::EdgeReferences { - let iter = self.suc.iter().enumerate().flat_map(proj2 as _); - EdgeReferences { iter } - } -} - -iterator_wrap! { -impl (Iterator) for -/// Iterator over the [`EdgeReference`] of the outgoing edges from a node. -#[derive(Debug, Clone)] -struct OutgoingEdgeReferences<'a, E, Ix> where { Ix: IndexType } -item: EdgeReference<'a, E, Ix>, -iter: SomeIter<'a, E, Ix>, -} - -impl<'a, Ix: IndexType, E> visit::IntoEdges for &'a List<E, Ix> { - type Edges = OutgoingEdgeReferences<'a, E, Ix>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - let iter = self.suc[a.index()] - .iter() - .enumerate() - .zip(std::iter::repeat(a)) - .map(proj1 as _); - OutgoingEdgeReferences { iter } - } -} - -impl<E, Ix: IndexType> visit::GraphProp for List<E, Ix> { - type EdgeType = crate::Directed; - fn is_directed(&self) -> bool { - true - } -} - -impl<E, Ix: IndexType> NodeCount for List<E, Ix> { - /// Returns the number of nodes in the list - /// - /// Computes in **O(1)** time. - fn node_count(&self) -> usize { - self.suc.len() - } -} - -impl<E, Ix: IndexType> EdgeCount for List<E, Ix> { - /// Returns the number of edges in the list - /// - /// Computes in **O(|V|)** time. - fn edge_count(&self) -> usize { - List::edge_count(self) - } -} - -impl<E, Ix: IndexType> visit::NodeIndexable for List<E, Ix> { - fn node_bound(&self) -> usize { - self.node_count() - } - #[inline] - fn to_index(&self, a: Self::NodeId) -> usize { - a.index() - } - #[inline] - fn from_index(&self, i: usize) -> Self::NodeId { - Ix::new(i) - } -} - -impl<E, Ix: IndexType> visit::NodeCompactIndexable for List<E, Ix> {} - -impl<E, Ix: IndexType> DataMap for List<E, Ix> { - fn node_weight(&self, n: Self::NodeId) -> Option<&()> { - if n.index() < self.suc.len() { - Some(&()) - } else { - None - } - } - - /// Accesses the weight of edge `e` - /// - /// Computes in **O(1)** - fn edge_weight(&self, e: EdgeIndex<Ix>) -> Option<&E> { - self.get_edge(e).map(|x| &x.weight) - } -} - -impl<E, Ix: IndexType> DataMapMut for List<E, Ix> { - fn node_weight_mut(&mut self, n: Self::NodeId) -> Option<&mut ()> { - if n.index() < self.suc.len() { - // A hack to produce a &'static mut () - // It does not actually allocate according to godbolt - let b = Box::new(()); - Some(Box::leak(b)) - } else { - None - } - } - /// Accesses the weight of edge `e` - /// - /// Computes in **O(1)** - fn edge_weight_mut(&mut self, e: EdgeIndex<Ix>) -> Option<&mut E> { - self.get_edge_mut(e).map(|x| &mut x.weight) - } -} - -/// The adjacency matrix for **List** is a bitmap that's computed by -/// `.adjacency_matrix()`. -impl<E, Ix> GetAdjacencyMatrix for List<E, Ix> -where - Ix: IndexType, -{ - type AdjMatrix = FixedBitSet; - - fn adjacency_matrix(&self) -> FixedBitSet { - let n = self.node_count(); - let mut matrix = FixedBitSet::with_capacity(n * n); - for edge in self.edge_references() { - let i = edge.source().index() * n + edge.target().index(); - matrix.put(i); - } - matrix - } - - fn is_adjacent(&self, matrix: &FixedBitSet, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - let n = self.node_count(); - let index = n * a.index() + b.index(); - matrix.contains(index) - } -} diff --git a/vendor/petgraph/src/algo/astar.rs b/vendor/petgraph/src/algo/astar.rs deleted file mode 100644 index 183542c0..00000000 --- a/vendor/petgraph/src/algo/astar.rs +++ /dev/null @@ -1,178 +0,0 @@ -use std::collections::hash_map::Entry::{Occupied, Vacant}; -use std::collections::{BinaryHeap, HashMap}; - -use std::hash::Hash; - -use crate::scored::MinScored; -use crate::visit::{EdgeRef, GraphBase, IntoEdges, Visitable}; - -use crate::algo::Measure; - -/// \[Generic\] A* shortest path algorithm. -/// -/// Computes the shortest path from `start` to `finish`, including the total path cost. -/// -/// `finish` is implicitly given via the `is_goal` callback, which should return `true` if the -/// given node is the finish node. -/// -/// The function `edge_cost` should return the cost for a particular edge. Edge costs must be -/// non-negative. -/// -/// The function `estimate_cost` should return the estimated cost to the finish for a particular -/// node. For the algorithm to find the actual shortest path, it should be admissible, meaning that -/// it should never overestimate the actual cost to get to the nearest goal node. Estimate costs -/// must also be non-negative. -/// -/// The graph should be `Visitable` and implement `IntoEdges`. -/// -/// # Example -/// ``` -/// use petgraph::Graph; -/// use petgraph::algo::astar; -/// -/// let mut g = Graph::new(); -/// let a = g.add_node((0., 0.)); -/// let b = g.add_node((2., 0.)); -/// let c = g.add_node((1., 1.)); -/// let d = g.add_node((0., 2.)); -/// let e = g.add_node((3., 3.)); -/// let f = g.add_node((4., 2.)); -/// g.extend_with_edges(&[ -/// (a, b, 2), -/// (a, d, 4), -/// (b, c, 1), -/// (b, f, 7), -/// (c, e, 5), -/// (e, f, 1), -/// (d, e, 1), -/// ]); -/// -/// // Graph represented with the weight of each edge -/// // Edges with '*' are part of the optimal path. -/// // -/// // 2 1 -/// // a ----- b ----- c -/// // | 4* | 7 | -/// // d f | 5 -/// // | 1* | 1* | -/// // \------ e ------/ -/// -/// let path = astar(&g, a, |finish| finish == f, |e| *e.weight(), |_| 0); -/// assert_eq!(path, Some((6, vec![a, d, e, f]))); -/// ``` -/// -/// Returns the total cost + the path of subsequent `NodeId` from start to finish, if one was -/// found. -pub fn astar<G, F, H, K, IsGoal>( - graph: G, - start: G::NodeId, - mut is_goal: IsGoal, - mut edge_cost: F, - mut estimate_cost: H, -) -> Option<(K, Vec<G::NodeId>)> -where - G: IntoEdges + Visitable, - IsGoal: FnMut(G::NodeId) -> bool, - G::NodeId: Eq + Hash, - F: FnMut(G::EdgeRef) -> K, - H: FnMut(G::NodeId) -> K, - K: Measure + Copy, -{ - let mut visit_next = BinaryHeap::new(); - let mut scores = HashMap::new(); // g-values, cost to reach the node - let mut estimate_scores = HashMap::new(); // f-values, cost to reach + estimate cost to goal - let mut path_tracker = PathTracker::<G>::new(); - - let zero_score = K::default(); - scores.insert(start, zero_score); - visit_next.push(MinScored(estimate_cost(start), start)); - - while let Some(MinScored(estimate_score, node)) = visit_next.pop() { - if is_goal(node) { - let path = path_tracker.reconstruct_path_to(node); - let cost = scores[&node]; - return Some((cost, path)); - } - - // This lookup can be unwrapped without fear of panic since the node was necessarily scored - // before adding it to `visit_next`. - let node_score = scores[&node]; - - match estimate_scores.entry(node) { - Occupied(mut entry) => { - // If the node has already been visited with an equal or lower score than now, then - // we do not need to re-visit it. - if *entry.get() <= estimate_score { - continue; - } - entry.insert(estimate_score); - } - Vacant(entry) => { - entry.insert(estimate_score); - } - } - - for edge in graph.edges(node) { - let next = edge.target(); - let next_score = node_score + edge_cost(edge); - - match scores.entry(next) { - Occupied(mut entry) => { - // No need to add neighbors that we have already reached through a shorter path - // than now. - if *entry.get() <= next_score { - continue; - } - entry.insert(next_score); - } - Vacant(entry) => { - entry.insert(next_score); - } - } - - path_tracker.set_predecessor(next, node); - let next_estimate_score = next_score + estimate_cost(next); - visit_next.push(MinScored(next_estimate_score, next)); - } - } - - None -} - -struct PathTracker<G> -where - G: GraphBase, - G::NodeId: Eq + Hash, -{ - came_from: HashMap<G::NodeId, G::NodeId>, -} - -impl<G> PathTracker<G> -where - G: GraphBase, - G::NodeId: Eq + Hash, -{ - fn new() -> PathTracker<G> { - PathTracker { - came_from: HashMap::new(), - } - } - - fn set_predecessor(&mut self, node: G::NodeId, previous: G::NodeId) { - self.came_from.insert(node, previous); - } - - fn reconstruct_path_to(&self, last: G::NodeId) -> Vec<G::NodeId> { - let mut path = vec![last]; - - let mut current = last; - while let Some(&previous) = self.came_from.get(¤t) { - path.push(previous); - current = previous; - } - - path.reverse(); - - path - } -} diff --git a/vendor/petgraph/src/algo/bellman_ford.rs b/vendor/petgraph/src/algo/bellman_ford.rs deleted file mode 100644 index 52fbd44c..00000000 --- a/vendor/petgraph/src/algo/bellman_ford.rs +++ /dev/null @@ -1,244 +0,0 @@ -//! Bellman-Ford algorithms. - -use crate::prelude::*; - -use crate::visit::{IntoEdges, IntoNodeIdentifiers, NodeCount, NodeIndexable, VisitMap, Visitable}; - -use super::{FloatMeasure, NegativeCycle}; - -#[derive(Debug, Clone)] -pub struct Paths<NodeId, EdgeWeight> { - pub distances: Vec<EdgeWeight>, - pub predecessors: Vec<Option<NodeId>>, -} - -/// \[Generic\] Compute shortest paths from node `source` to all other. -/// -/// Using the [Bellman–Ford algorithm][bf]; negative edge costs are -/// permitted, but the graph must not have a cycle of negative weights -/// (in that case it will return an error). -/// -/// On success, return one vec with path costs, and another one which points -/// out the predecessor of a node along a shortest path. The vectors -/// are indexed by the graph's node indices. -/// -/// [bf]: https://en.wikipedia.org/wiki/Bellman%E2%80%93Ford_algorithm -/// -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::bellman_ford; -/// use petgraph::prelude::*; -/// -/// let mut g = Graph::new(); -/// let a = g.add_node(()); // node with no weight -/// let b = g.add_node(()); -/// let c = g.add_node(()); -/// let d = g.add_node(()); -/// let e = g.add_node(()); -/// let f = g.add_node(()); -/// g.extend_with_edges(&[ -/// (0, 1, 2.0), -/// (0, 3, 4.0), -/// (1, 2, 1.0), -/// (1, 5, 7.0), -/// (2, 4, 5.0), -/// (4, 5, 1.0), -/// (3, 4, 1.0), -/// ]); -/// -/// // Graph represented with the weight of each edge -/// // -/// // 2 1 -/// // a ----- b ----- c -/// // | 4 | 7 | -/// // d f | 5 -/// // | 1 | 1 | -/// // \------ e ------/ -/// -/// let path = bellman_ford(&g, a); -/// assert!(path.is_ok()); -/// let path = path.unwrap(); -/// assert_eq!(path.distances, vec![ 0.0, 2.0, 3.0, 4.0, 5.0, 6.0]); -/// assert_eq!(path.predecessors, vec![None, Some(a),Some(b),Some(a), Some(d), Some(e)]); -/// -/// // Node f (indice 5) can be reach from a with a path costing 6. -/// // Predecessor of f is Some(e) which predecessor is Some(d) which predecessor is Some(a). -/// // Thus the path from a to f is a <-> d <-> e <-> f -/// -/// let graph_with_neg_cycle = Graph::<(), f32, Undirected>::from_edges(&[ -/// (0, 1, -2.0), -/// (0, 3, -4.0), -/// (1, 2, -1.0), -/// (1, 5, -25.0), -/// (2, 4, -5.0), -/// (4, 5, -25.0), -/// (3, 4, -1.0), -/// ]); -/// -/// assert!(bellman_ford(&graph_with_neg_cycle, NodeIndex::new(0)).is_err()); -/// ``` -pub fn bellman_ford<G>( - g: G, - source: G::NodeId, -) -> Result<Paths<G::NodeId, G::EdgeWeight>, NegativeCycle> -where - G: NodeCount + IntoNodeIdentifiers + IntoEdges + NodeIndexable, - G::EdgeWeight: FloatMeasure, -{ - let ix = |i| g.to_index(i); - - // Step 1 and Step 2: initialize and relax - let (distances, predecessors) = bellman_ford_initialize_relax(g, source); - - // Step 3: check for negative weight cycle - for i in g.node_identifiers() { - for edge in g.edges(i) { - let j = edge.target(); - let w = *edge.weight(); - if distances[ix(i)] + w < distances[ix(j)] { - return Err(NegativeCycle(())); - } - } - } - - Ok(Paths { - distances, - predecessors, - }) -} - -/// \[Generic\] Find the path of a negative cycle reachable from node `source`. -/// -/// Using the [find_negative_cycle][nc]; will search the Graph for negative cycles using -/// [Bellman–Ford algorithm][bf]. If no negative cycle is found the function will return `None`. -/// -/// If a negative cycle is found from source, return one vec with a path of `NodeId`s. -/// -/// The time complexity of this algorithm should be the same as the Bellman-Ford (O(|V|·|E|)). -/// -/// [nc]: https://blogs.asarkar.com/assets/docs/algorithms-curated/Negative-Weight%20Cycle%20Algorithms%20-%20Huang.pdf -/// [bf]: https://en.wikipedia.org/wiki/Bellman%E2%80%93Ford_algorithm -/// -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::find_negative_cycle; -/// use petgraph::prelude::*; -/// -/// let graph_with_neg_cycle = Graph::<(), f32, Directed>::from_edges(&[ -/// (0, 1, 1.), -/// (0, 2, 1.), -/// (0, 3, 1.), -/// (1, 3, 1.), -/// (2, 1, 1.), -/// (3, 2, -3.), -/// ]); -/// -/// let path = find_negative_cycle(&graph_with_neg_cycle, NodeIndex::new(0)); -/// assert_eq!( -/// path, -/// Some([NodeIndex::new(1), NodeIndex::new(3), NodeIndex::new(2)].to_vec()) -/// ); -/// ``` -pub fn find_negative_cycle<G>(g: G, source: G::NodeId) -> Option<Vec<G::NodeId>> -where - G: NodeCount + IntoNodeIdentifiers + IntoEdges + NodeIndexable + Visitable, - G::EdgeWeight: FloatMeasure, -{ - let ix = |i| g.to_index(i); - let mut path = Vec::<G::NodeId>::new(); - - // Step 1: initialize and relax - let (distance, predecessor) = bellman_ford_initialize_relax(g, source); - - // Step 2: Check for negative weight cycle - 'outer: for i in g.node_identifiers() { - for edge in g.edges(i) { - let j = edge.target(); - let w = *edge.weight(); - if distance[ix(i)] + w < distance[ix(j)] { - // Step 3: negative cycle found - let start = j; - let mut node = start; - let mut visited = g.visit_map(); - // Go backward in the predecessor chain - loop { - let ancestor = match predecessor[ix(node)] { - Some(predecessor_node) => predecessor_node, - None => node, // no predecessor, self cycle - }; - // We have only 2 ways to find the cycle and break the loop: - // 1. start is reached - if ancestor == start { - path.push(ancestor); - break; - } - // 2. some node was reached twice - else if visited.is_visited(&ancestor) { - // Drop any node in path that is before the first ancestor - let pos = path - .iter() - .position(|&p| p == ancestor) - .expect("we should always have a position"); - path = path[pos..path.len()].to_vec(); - - break; - } - - // None of the above, some middle path node - path.push(ancestor); - visited.visit(ancestor); - node = ancestor; - } - // We are done here - break 'outer; - } - } - } - if !path.is_empty() { - // Users will probably need to follow the path of the negative cycle - // so it should be in the reverse order than it was found by the algorithm. - path.reverse(); - Some(path) - } else { - None - } -} - -// Perform Step 1 and Step 2 of the Bellman-Ford algorithm. -#[inline(always)] -fn bellman_ford_initialize_relax<G>( - g: G, - source: G::NodeId, -) -> (Vec<G::EdgeWeight>, Vec<Option<G::NodeId>>) -where - G: NodeCount + IntoNodeIdentifiers + IntoEdges + NodeIndexable, - G::EdgeWeight: FloatMeasure, -{ - // Step 1: initialize graph - let mut predecessor = vec![None; g.node_bound()]; - let mut distance = vec![<_>::infinite(); g.node_bound()]; - let ix = |i| g.to_index(i); - distance[ix(source)] = <_>::zero(); - - // Step 2: relax edges repeatedly - for _ in 1..g.node_count() { - let mut did_update = false; - for i in g.node_identifiers() { - for edge in g.edges(i) { - let j = edge.target(); - let w = *edge.weight(); - if distance[ix(i)] + w < distance[ix(j)] { - distance[ix(j)] = distance[ix(i)] + w; - predecessor[ix(j)] = Some(i); - did_update = true; - } - } - } - if !did_update { - break; - } - } - (distance, predecessor) -} diff --git a/vendor/petgraph/src/algo/coloring.rs b/vendor/petgraph/src/algo/coloring.rs deleted file mode 100644 index 96c1e273..00000000 --- a/vendor/petgraph/src/algo/coloring.rs +++ /dev/null @@ -1,96 +0,0 @@ -use std::collections::{BinaryHeap, HashMap, HashSet}; -use std::hash::Hash; - -use crate::scored::MaxScored; -use crate::visit::{IntoEdges, IntoNodeIdentifiers, NodeIndexable, VisitMap, Visitable}; - -/// \[Generic\] DStatur algorithm to properly color a non weighted undirected graph. -/// https://en.wikipedia.org/wiki/DSatur -/// -/// This is a heuristic. So, it does not necessarily return a minimum coloring. -/// -/// The graph must be undirected. It should not contain loops. -/// It must implement `IntoEdges`, `IntoNodeIdentifiers` and `Visitable` -/// Returns a tuple composed of a HashMap that associates to each `NodeId` its color and the number of used colors. -/// -/// Computes in **O((|V| + |E|)*log(|V|)** time -/// -/// # Example -/// ```rust -/// use petgraph::{Graph, Undirected}; -/// use petgraph::algo::dsatur_coloring; -/// -/// let mut graph: Graph<(), (), Undirected> = Graph::new_undirected(); -/// let a = graph.add_node(()); -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// let e = graph.add_node(()); -/// let f = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (b, c), -/// (c, d), -/// (d, e), -/// (e, f), -/// (f, a), -/// ]); -/// -/// // a ----- b ----- c -/// // | | -/// // | | -/// // | | -/// // f ----- e------ d -/// -/// let (coloring, nb_colors) = dsatur_coloring(&graph); -/// assert_eq!(nb_colors, 2); -/// assert_ne!(coloring[&a], coloring[&b]); -/// ``` - -pub fn dsatur_coloring<G>(graph: G) -> (HashMap<G::NodeId, usize>, usize) -where - G: IntoEdges + IntoNodeIdentifiers + Visitable + NodeIndexable, - G::NodeId: Eq + Hash, -{ - let ix = |v| graph.to_index(v); - let n = graph.node_bound(); - - let mut degree_map = vec![0; n]; - let mut queue = BinaryHeap::with_capacity(n); - let mut colored = HashMap::with_capacity(n); - let mut adj_color_map = vec![HashSet::new(); n]; - let mut seen = graph.visit_map(); - let mut max_color = 0; - - for node in graph.node_identifiers() { - let degree = graph.edges(node).count(); - queue.push(MaxScored((0, degree), node)); - degree_map[ix(node)] = degree; - } - - while let Some(MaxScored(_, node)) = queue.pop() { - if seen.is_visited(&node) { - continue; - } - seen.visit(node); - - let adj_color = &adj_color_map[ix(node)]; - let mut color = 0; - while adj_color.contains(&color) { - color += 1; - } - - colored.insert(node, color); - max_color = max_color.max(color); - - for nbor in graph.neighbors(node) { - if let Some(adj_color) = adj_color_map.get_mut(ix(nbor)) { - adj_color.insert(color); - queue.push(MaxScored((adj_color.len(), degree_map[ix(nbor)]), nbor)); - } - } - } - - (colored, max_color + 1) -} diff --git a/vendor/petgraph/src/algo/dijkstra.rs b/vendor/petgraph/src/algo/dijkstra.rs deleted file mode 100644 index b2876b26..00000000 --- a/vendor/petgraph/src/algo/dijkstra.rs +++ /dev/null @@ -1,122 +0,0 @@ -use std::collections::hash_map::Entry::{Occupied, Vacant}; -use std::collections::{BinaryHeap, HashMap}; - -use std::hash::Hash; - -use crate::algo::Measure; -use crate::scored::MinScored; -use crate::visit::{EdgeRef, IntoEdges, VisitMap, Visitable}; - -/// \[Generic\] Dijkstra's shortest path algorithm. -/// -/// Compute the length of the shortest path from `start` to every reachable -/// node. -/// -/// The graph should be `Visitable` and implement `IntoEdges`. The function -/// `edge_cost` should return the cost for a particular edge, which is used -/// to compute path costs. Edge costs must be non-negative. -/// -/// If `goal` is not `None`, then the algorithm terminates once the `goal` node's -/// cost is calculated. -/// -/// Returns a `HashMap` that maps `NodeId` to path cost. -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::dijkstra; -/// use petgraph::prelude::*; -/// use std::collections::HashMap; -/// -/// let mut graph: Graph<(), (), Directed> = Graph::new(); -/// let a = graph.add_node(()); // node with no weight -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// let e = graph.add_node(()); -/// let f = graph.add_node(()); -/// let g = graph.add_node(()); -/// let h = graph.add_node(()); -/// // z will be in another connected component -/// let z = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (b, c), -/// (c, d), -/// (d, a), -/// (e, f), -/// (b, e), -/// (f, g), -/// (g, h), -/// (h, e), -/// ]); -/// // a ----> b ----> e ----> f -/// // ^ | ^ | -/// // | v | v -/// // d <---- c h <---- g -/// -/// let expected_res: HashMap<NodeIndex, usize> = [ -/// (a, 3), -/// (b, 0), -/// (c, 1), -/// (d, 2), -/// (e, 1), -/// (f, 2), -/// (g, 3), -/// (h, 4), -/// ].iter().cloned().collect(); -/// let res = dijkstra(&graph, b, None, |_| 1); -/// assert_eq!(res, expected_res); -/// // z is not inside res because there is not path from b to z. -/// ``` -pub fn dijkstra<G, F, K>( - graph: G, - start: G::NodeId, - goal: Option<G::NodeId>, - mut edge_cost: F, -) -> HashMap<G::NodeId, K> -where - G: IntoEdges + Visitable, - G::NodeId: Eq + Hash, - F: FnMut(G::EdgeRef) -> K, - K: Measure + Copy, -{ - let mut visited = graph.visit_map(); - let mut scores = HashMap::new(); - //let mut predecessor = HashMap::new(); - let mut visit_next = BinaryHeap::new(); - let zero_score = K::default(); - scores.insert(start, zero_score); - visit_next.push(MinScored(zero_score, start)); - while let Some(MinScored(node_score, node)) = visit_next.pop() { - if visited.is_visited(&node) { - continue; - } - if goal.as_ref() == Some(&node) { - break; - } - for edge in graph.edges(node) { - let next = edge.target(); - if visited.is_visited(&next) { - continue; - } - let next_score = node_score + edge_cost(edge); - match scores.entry(next) { - Occupied(ent) => { - if next_score < *ent.get() { - *ent.into_mut() = next_score; - visit_next.push(MinScored(next_score, next)); - //predecessor.insert(next.clone(), node.clone()); - } - } - Vacant(ent) => { - ent.insert(next_score); - visit_next.push(MinScored(next_score, next)); - //predecessor.insert(next.clone(), node.clone()); - } - } - } - visited.visit(node); - } - scores -} diff --git a/vendor/petgraph/src/algo/dominators.rs b/vendor/petgraph/src/algo/dominators.rs deleted file mode 100644 index 9e709352..00000000 --- a/vendor/petgraph/src/algo/dominators.rs +++ /dev/null @@ -1,333 +0,0 @@ -//! Compute dominators of a control-flow graph. -//! -//! # The Dominance Relation -//! -//! In a directed graph with a root node **R**, a node **A** is said to *dominate* a -//! node **B** iff every path from **R** to **B** contains **A**. -//! -//! The node **A** is said to *strictly dominate* the node **B** iff **A** dominates -//! **B** and **A ≠ B**. -//! -//! The node **A** is said to be the *immediate dominator* of a node **B** iff it -//! strictly dominates **B** and there does not exist any node **C** where **A** -//! dominates **C** and **C** dominates **B**. - -use std::cmp::Ordering; -use std::collections::{hash_map::Iter, HashMap, HashSet}; -use std::hash::Hash; - -use crate::visit::{DfsPostOrder, GraphBase, IntoNeighbors, Visitable, Walker}; - -/// The dominance relation for some graph and root. -#[derive(Debug, Clone)] -pub struct Dominators<N> -where - N: Copy + Eq + Hash, -{ - root: N, - dominators: HashMap<N, N>, -} - -impl<N> Dominators<N> -where - N: Copy + Eq + Hash, -{ - /// Get the root node used to construct these dominance relations. - pub fn root(&self) -> N { - self.root - } - - /// Get the immediate dominator of the given node. - /// - /// Returns `None` for any node that is not reachable from the root, and for - /// the root itself. - pub fn immediate_dominator(&self, node: N) -> Option<N> { - if node == self.root { - None - } else { - self.dominators.get(&node).cloned() - } - } - - /// Iterate over the given node's strict dominators. - /// - /// If the given node is not reachable from the root, then `None` is - /// returned. - pub fn strict_dominators(&self, node: N) -> Option<DominatorsIter<N>> { - if self.dominators.contains_key(&node) { - Some(DominatorsIter { - dominators: self, - node: self.immediate_dominator(node), - }) - } else { - None - } - } - - /// Iterate over all of the given node's dominators (including the given - /// node itself). - /// - /// If the given node is not reachable from the root, then `None` is - /// returned. - pub fn dominators(&self, node: N) -> Option<DominatorsIter<N>> { - if self.dominators.contains_key(&node) { - Some(DominatorsIter { - dominators: self, - node: Some(node), - }) - } else { - None - } - } - - /// Iterate over all nodes immediately dominated by the given node (not - /// including the given node itself). - pub fn immediately_dominated_by(&self, node: N) -> DominatedByIter<N> { - DominatedByIter { - iter: self.dominators.iter(), - node, - } - } -} - -/// Iterator for a node's dominators. -#[derive(Debug, Clone)] -pub struct DominatorsIter<'a, N> -where - N: 'a + Copy + Eq + Hash, -{ - dominators: &'a Dominators<N>, - node: Option<N>, -} - -impl<'a, N> Iterator for DominatorsIter<'a, N> -where - N: 'a + Copy + Eq + Hash, -{ - type Item = N; - - fn next(&mut self) -> Option<Self::Item> { - let next = self.node.take(); - if let Some(next) = next { - self.node = self.dominators.immediate_dominator(next); - } - next - } -} - -/// Iterator for nodes dominated by a given node. -#[derive(Debug, Clone)] -pub struct DominatedByIter<'a, N> -where - N: 'a + Copy + Eq + Hash, -{ - iter: Iter<'a, N, N>, - node: N, -} - -impl<'a, N> Iterator for DominatedByIter<'a, N> -where - N: 'a + Copy + Eq + Hash, -{ - type Item = N; - - fn next(&mut self) -> Option<Self::Item> { - for (dominator, dominated) in self.iter.by_ref() { - // The root node dominates itself, but it should not be included in - // the results. - if dominated == &self.node && dominated != dominator { - return Some(*dominator); - } - } - None - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -/// The undefined dominator sentinel, for when we have not yet discovered a -/// node's dominator. -const UNDEFINED: usize = ::std::usize::MAX; - -/// This is an implementation of the engineered ["Simple, Fast Dominance -/// Algorithm"][0] discovered by Cooper et al. -/// -/// This algorithm is **O(|V|²)**, and therefore has slower theoretical running time -/// than the Lengauer-Tarjan algorithm (which is **O(|E| log |V|)**. However, -/// Cooper et al found it to be faster in practice on control flow graphs of up -/// to ~30,000 vertices. -/// -/// [0]: http://www.hipersoft.rice.edu/grads/publications/dom14.pdf -pub fn simple_fast<G>(graph: G, root: G::NodeId) -> Dominators<G::NodeId> -where - G: IntoNeighbors + Visitable, - <G as GraphBase>::NodeId: Eq + Hash, -{ - let (post_order, predecessor_sets) = simple_fast_post_order(graph, root); - let length = post_order.len(); - debug_assert!(length > 0); - debug_assert!(post_order.last() == Some(&root)); - - // From here on out we use indices into `post_order` instead of actual - // `NodeId`s wherever possible. This greatly improves the performance of - // this implementation, but we have to pay a little bit of upfront cost to - // convert our data structures to play along first. - - // Maps a node to its index into `post_order`. - let node_to_post_order_idx: HashMap<_, _> = post_order - .iter() - .enumerate() - .map(|(idx, &node)| (node, idx)) - .collect(); - - // Maps a node's `post_order` index to its set of predecessors's indices - // into `post_order` (as a vec). - let idx_to_predecessor_vec = - predecessor_sets_to_idx_vecs(&post_order, &node_to_post_order_idx, predecessor_sets); - - let mut dominators = vec![UNDEFINED; length]; - dominators[length - 1] = length - 1; - - let mut changed = true; - while changed { - changed = false; - - // Iterate in reverse post order, skipping the root. - - for idx in (0..length - 1).rev() { - debug_assert!(post_order[idx] != root); - - // Take the intersection of every predecessor's dominator set; that - // is the current best guess at the immediate dominator for this - // node. - - let new_idom_idx = { - let mut predecessors = idx_to_predecessor_vec[idx] - .iter() - .filter(|&&p| dominators[p] != UNDEFINED); - let new_idom_idx = predecessors.next().expect( - "Because the root is initialized to dominate itself, and is the \ - first node in every path, there must exist a predecessor to this \ - node that also has a dominator", - ); - predecessors.fold(*new_idom_idx, |new_idom_idx, &predecessor_idx| { - intersect(&dominators, new_idom_idx, predecessor_idx) - }) - }; - - debug_assert!(new_idom_idx < length); - - if new_idom_idx != dominators[idx] { - dominators[idx] = new_idom_idx; - changed = true; - } - } - } - - // All done! Translate the indices back into proper `G::NodeId`s. - - debug_assert!(!dominators.iter().any(|&dom| dom == UNDEFINED)); - - Dominators { - root, - dominators: dominators - .into_iter() - .enumerate() - .map(|(idx, dom_idx)| (post_order[idx], post_order[dom_idx])) - .collect(), - } -} - -fn intersect(dominators: &[usize], mut finger1: usize, mut finger2: usize) -> usize { - loop { - match finger1.cmp(&finger2) { - Ordering::Less => finger1 = dominators[finger1], - Ordering::Greater => finger2 = dominators[finger2], - Ordering::Equal => return finger1, - } - } -} - -fn predecessor_sets_to_idx_vecs<N>( - post_order: &[N], - node_to_post_order_idx: &HashMap<N, usize>, - mut predecessor_sets: HashMap<N, HashSet<N>>, -) -> Vec<Vec<usize>> -where - N: Copy + Eq + Hash, -{ - post_order - .iter() - .map(|node| { - predecessor_sets - .remove(node) - .map(|predecessors| { - predecessors - .into_iter() - .map(|p| *node_to_post_order_idx.get(&p).unwrap()) - .collect() - }) - .unwrap_or_default() - }) - .collect() -} - -type PredecessorSets<NodeId> = HashMap<NodeId, HashSet<NodeId>>; - -fn simple_fast_post_order<G>( - graph: G, - root: G::NodeId, -) -> (Vec<G::NodeId>, PredecessorSets<G::NodeId>) -where - G: IntoNeighbors + Visitable, - <G as GraphBase>::NodeId: Eq + Hash, -{ - let mut post_order = vec![]; - let mut predecessor_sets = HashMap::new(); - - for node in DfsPostOrder::new(graph, root).iter(graph) { - post_order.push(node); - - for successor in graph.neighbors(node) { - predecessor_sets - .entry(successor) - .or_insert_with(HashSet::new) - .insert(node); - } - } - - (post_order, predecessor_sets) -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn test_iter_dominators() { - let doms: Dominators<u32> = Dominators { - root: 0, - dominators: [(2, 1), (1, 0), (0, 0)].iter().cloned().collect(), - }; - - let all_doms: Vec<_> = doms.dominators(2).unwrap().collect(); - assert_eq!(vec![2, 1, 0], all_doms); - - assert_eq!(None::<()>, doms.dominators(99).map(|_| unreachable!())); - - let strict_doms: Vec<_> = doms.strict_dominators(2).unwrap().collect(); - assert_eq!(vec![1, 0], strict_doms); - - assert_eq!( - None::<()>, - doms.strict_dominators(99).map(|_| unreachable!()) - ); - - let dom_by: Vec<_> = doms.immediately_dominated_by(1).collect(); - assert_eq!(vec![2], dom_by); - assert_eq!(None, doms.immediately_dominated_by(99).next()); - assert_eq!(1, doms.immediately_dominated_by(0).count()); - } -} diff --git a/vendor/petgraph/src/algo/feedback_arc_set.rs b/vendor/petgraph/src/algo/feedback_arc_set.rs deleted file mode 100644 index 9b9c95d4..00000000 --- a/vendor/petgraph/src/algo/feedback_arc_set.rs +++ /dev/null @@ -1,449 +0,0 @@ -use std::{ - collections::{HashMap, VecDeque}, - ops::{Index, IndexMut}, -}; - -use crate::{ - graph::{GraphIndex, NodeIndex}, - visit::{EdgeRef, GraphProp, IntoEdgeReferences}, - Directed, -}; - -use self::linked_list::{LinkedList, LinkedListEntry}; - -/// \[Generic\] Finds a [feedback arc set]: a set of edges in the given directed graph, which when -/// removed, make the graph acyclic. -/// -/// Uses a [greedy heuristic algorithm] to select a small number of edges, but does not necessarily -/// find the minimum feedback arc set. Time complexity is roughly **O(|E|)** for an input graph with -/// edges **E**. -/// -/// Does not consider edge/node weights when selecting edges for the feedback arc set. -/// -/// Loops (edges to and from the same node) are always included in the returned set. -/// -/// # Example -/// -/// ``` -/// # #[cfg(feature = "stable_graph")] { -/// use petgraph::{ -/// algo::{greedy_feedback_arc_set, is_cyclic_directed}, -/// graph::EdgeIndex, -/// stable_graph::StableGraph, -/// visit::EdgeRef, -/// }; -/// -/// let mut g: StableGraph<(), ()> = StableGraph::from_edges(&[ -/// (0, 1), -/// (1, 2), -/// (2, 3), -/// (3, 4), -/// (4, 5), -/// (5, 0), -/// (4, 1), -/// (1, 3), -/// ]); -/// -/// assert!(is_cyclic_directed(&g)); -/// -/// let fas: Vec<EdgeIndex> = greedy_feedback_arc_set(&g).map(|e| e.id()).collect(); -/// -/// // Remove edges in feedback arc set from original graph -/// for edge_id in fas { -/// g.remove_edge(edge_id); -/// } -/// -/// assert!(!is_cyclic_directed(&g)); -/// # } -/// ``` -/// -/// [feedback arc set]: https://en.wikipedia.org/wiki/Feedback_arc_set -/// [greedy heuristic algorithm]: https://doi.org/10.1016/0020-0190(93)90079-O -pub fn greedy_feedback_arc_set<G>(g: G) -> impl Iterator<Item = G::EdgeRef> -where - G: IntoEdgeReferences + GraphProp<EdgeType = Directed>, - G::NodeId: GraphIndex, - G: crate::visit::NodeCount, -{ - let node_seq = good_node_sequence(g.edge_references().map(|e| { - ( - NodeIndex::new(e.source().index()), - NodeIndex::new(e.target().index()), - ) - })); - - g.edge_references() - .filter(move |e| node_seq[&e.source().index()] >= node_seq[&e.target().index()]) -} - -fn good_node_sequence( - edge_refs: impl Iterator<Item = (NodeIndex<usize>, NodeIndex<usize>)>, -) -> HashMap<usize, usize> { - let mut nodes = FasNodeContainer { nodes: Vec::new() }; - let mut buckets = Buckets { - sinks_or_isolated: NodeLinkedList::new(), - sources: NodeLinkedList::new(), - bidirectional_pve_dd: Vec::new(), - bidirectional_nve_dd: Vec::new(), - }; - // Lookup of node indices from input graph to indices into `nodes` - let mut graph_ix_lookup = HashMap::new(); - - // Build node entries - for (from_g_ix, to_g_ix) in edge_refs { - let mut fas_node_entry = |g_ix: NodeIndex<usize>| -> FasNodeIndex { - match graph_ix_lookup.get(&g_ix) { - Some(fas_ix) => *fas_ix, - None => { - let fas_ix = FasNodeIndex(nodes.nodes.len()); - - nodes.nodes.push(LinkedListEntry::new(FasNode { - graph_ix: g_ix, - out_edges: Vec::new(), - in_edges: Vec::new(), - out_degree: 0, - in_degree: 0, - })); - - graph_ix_lookup.insert(g_ix, fas_ix); - - fas_ix - } - } - }; - - let from_fas_ix = fas_node_entry(from_g_ix); - let to_fas_ix = fas_node_entry(to_g_ix); - - nodes[from_fas_ix].data().out_edges.push(to_fas_ix); - nodes[to_fas_ix].data().in_edges.push(from_fas_ix); - } - - // Set initial in/out-degrees - for entry in nodes.nodes.iter_mut() { - let node = entry.data(); - node.out_degree = node.out_edges.len(); - node.in_degree = node.in_edges.len(); - } - - // Add nodes to initial lists - for i in 0..nodes.nodes.len() { - let fas_ix = FasNodeIndex(i); - buckets - .suitable_bucket(fas_ix, &mut nodes) - .push_front(fas_ix, &mut nodes); - } - - let mut s_1 = VecDeque::new(); - let mut s_2 = VecDeque::new(); - - loop { - let mut some_moved = false; - - while let Some(sink_fas_ix) = buckets.sinks_or_isolated.pop(&mut nodes) { - some_moved = true; - buckets.update_neighbour_node_buckets(sink_fas_ix, &mut nodes); - s_2.push_front(nodes[sink_fas_ix].data().graph_ix); - } - - while let Some(source_fas_ix) = buckets.sources.pop(&mut nodes) { - some_moved = true; - buckets.update_neighbour_node_buckets(source_fas_ix, &mut nodes); - s_1.push_back(nodes[source_fas_ix].data().graph_ix); - } - - if let Some(list) = buckets - .bidirectional_pve_dd - .iter_mut() - .rev() - .chain(buckets.bidirectional_nve_dd.iter_mut()) - .find(|b| b.start.is_some()) - { - let highest_dd_fas_ix = list.pop(&mut nodes).unwrap(); - some_moved = true; - buckets.update_neighbour_node_buckets(highest_dd_fas_ix, &mut nodes); - s_1.push_back(nodes[highest_dd_fas_ix].data().graph_ix); - - Buckets::trim_bucket_list(&mut buckets.bidirectional_pve_dd); - Buckets::trim_bucket_list(&mut buckets.bidirectional_nve_dd); - } - - if !some_moved { - break; - } - } - - s_1.into_iter() - .chain(s_2) - .enumerate() - .map(|(seq_order, node_index)| (node_index.index(), seq_order)) - .collect() -} - -type NodeLinkedList = LinkedList<FasNode, FasNodeContainer, FasNodeIndex>; - -#[derive(Debug)] -struct FasNodeContainer { - nodes: Vec<LinkedListEntry<FasNode, FasNodeIndex>>, -} - -impl Index<FasNodeIndex> for FasNodeContainer { - type Output = LinkedListEntry<FasNode, FasNodeIndex>; - - fn index(&self, index: FasNodeIndex) -> &Self::Output { - &self.nodes[index.0] - } -} - -impl IndexMut<FasNodeIndex> for FasNodeContainer { - fn index_mut(&mut self, index: FasNodeIndex) -> &mut Self::Output { - &mut self.nodes[index.0] - } -} - -#[derive(Debug)] -struct Buckets { - sinks_or_isolated: NodeLinkedList, - sources: NodeLinkedList, - /// Bidirectional nodes with positive-or-0 delta degree - bidirectional_pve_dd: Vec<NodeLinkedList>, - /// Bidirectional nodes with negative delta degree (index 0 is -1 dd, 1 is -2 etc) - bidirectional_nve_dd: Vec<NodeLinkedList>, -} - -#[derive(Clone, Copy, PartialEq, Debug)] -struct FasNodeIndex(usize); - -/// Represents a node from the input graph, tracking its current delta degree -#[derive(Debug)] -struct FasNode { - /// Node index in input graph. - graph_ix: NodeIndex<usize>, - - /// All outward edges from this node (not removed during processing) - out_edges: Vec<FasNodeIndex>, - - /// All inward edges from this node (not removed during processing) - in_edges: Vec<FasNodeIndex>, - - /// Current out-degree of this node (decremented during processing as connected nodes are - /// removed) - out_degree: usize, - - /// Current in-degree of this node (decremented during processing as connected nodes are - /// removed) - in_degree: usize, -} - -impl Buckets { - fn suitable_bucket( - &mut self, - ix: FasNodeIndex, - nodes: &mut FasNodeContainer, - ) -> &mut NodeLinkedList { - let node = nodes[ix].data(); - - if node.out_degree == 0 { - &mut self.sinks_or_isolated - } else if node.in_degree == 0 { - &mut self.sources - } else { - let delta_degree = node.out_degree as isize - node.in_degree as isize; - - if delta_degree >= 0 { - let bucket_ix = delta_degree as usize; - - if self.bidirectional_pve_dd.len() <= bucket_ix { - self.bidirectional_pve_dd - .resize_with(bucket_ix + 1, NodeLinkedList::new); - } - - &mut self.bidirectional_pve_dd[bucket_ix] - } else { - let bucket_ix = (-delta_degree - 1) as usize; - - if self.bidirectional_nve_dd.len() <= bucket_ix { - self.bidirectional_nve_dd - .resize_with(bucket_ix + 1, NodeLinkedList::new); - } - - &mut self.bidirectional_nve_dd[bucket_ix] - } - } - } - - fn update_neighbour_node_buckets(&mut self, ix: FasNodeIndex, nodes: &mut FasNodeContainer) { - for i in 0..nodes[ix].data().out_edges.len() { - let out_ix = nodes[ix].data().out_edges[i]; - - if out_ix == ix { - continue; - } - - // Ignore nodes which have already been moved to the good sequence - if !nodes[out_ix].is_in_list() { - continue; - } - - self.suitable_bucket(out_ix, nodes).remove(out_ix, nodes); - - // Other node has lost an in-edge; reduce in-degree by 1 - nodes[out_ix].data().in_degree -= 1; - - self.suitable_bucket(out_ix, nodes) - .push_front(out_ix, nodes); - } - - for i in 0..nodes[ix].data().in_edges.len() { - let in_ix = nodes[ix].data().in_edges[i]; - - if in_ix == ix { - continue; - } - - // Ignore nodes which have already been moved to the good sequence - if !nodes[in_ix].is_in_list() { - continue; - } - - self.suitable_bucket(in_ix, nodes).remove(in_ix, nodes); - - // Other node has lost an out-edge; reduce out-degree by 1 - nodes[in_ix].data().out_degree -= 1; - - self.suitable_bucket(in_ix, nodes).push_front(in_ix, nodes); - } - } - - fn trim_bucket_list(list: &mut Vec<NodeLinkedList>) { - let trunc_len = if let Some(highest_populated_index) = - (0..list.len()).rev().find(|i| list[*i].start.is_some()) - { - highest_populated_index + 1 - } else { - 0 - }; - - list.truncate(trunc_len); - } -} - -mod linked_list { - use std::{marker::PhantomData, ops::IndexMut}; - - #[derive(PartialEq, Debug)] - pub struct LinkedList<Data, Container, Ix> { - pub start: Option<Ix>, - marker: PhantomData<(Data, Container)>, - } - - #[derive(Debug)] - pub struct LinkedListEntry<Data, Ix> { - pos: Option<LinkedListPosition<Ix>>, - data: Data, - } - - #[derive(Debug)] - struct LinkedListPosition<Ix> { - prev: Option<Ix>, - next: Option<Ix>, - } - - impl<Data, Ix> LinkedListEntry<Data, Ix> { - pub fn new(data: Data) -> Self { - LinkedListEntry { pos: None, data } - } - - pub fn data(&mut self) -> &mut Data { - &mut self.data - } - - pub fn is_in_list(&mut self) -> bool { - self.pos.is_some() - } - - fn pos_mut(&mut self) -> &mut LinkedListPosition<Ix> { - self.pos - .as_mut() - .expect("expected linked list entry to have populated position") - } - } - - impl<Data, Container, Ix> LinkedList<Data, Container, Ix> - where - Container: IndexMut<Ix, Output = LinkedListEntry<Data, Ix>>, - Ix: PartialEq + Copy, - { - pub fn new() -> Self { - LinkedList { - start: None, - marker: PhantomData, - } - } - - pub fn push_front(&mut self, push_ix: Ix, container: &mut Container) { - if let Some(start_ix) = self.start { - let entry = &mut container[start_ix]; - entry.pos_mut().prev = Some(push_ix); - } - - let push_entry = &mut container[push_ix]; - push_entry.pos = Some(LinkedListPosition { - next: self.start, - prev: None, - }); - - self.start = Some(push_ix); - } - - pub fn pop(&mut self, container: &mut Container) -> Option<Ix> { - if let Some(remove_ix) = self.start { - self.remove(remove_ix, container); - Some(remove_ix) - } else { - None - } - } - - /// `remove_ix` **must** be a member of the list headed by `self` - pub fn remove(&mut self, remove_ix: Ix, container: &mut Container) { - debug_assert!( - self.to_vec(container).contains(&remove_ix), - "node to remove should be member of current linked list" - ); - - let remove_entry = &mut container[remove_ix]; - let ll_entry = remove_entry.pos.take().unwrap(); - - if let Some(prev_ix) = ll_entry.prev { - let prev_node = &mut container[prev_ix]; - prev_node.pos_mut().next = ll_entry.next; - } - - if let Some(next_ix) = ll_entry.next { - let next_node = &mut container[next_ix]; - next_node.pos_mut().prev = ll_entry.prev; - } - - // If the removed node was head of the list - if self.start == Some(remove_ix) { - self.start = ll_entry.next; - } - } - - /// For debug purposes - fn to_vec(&self, container: &mut Container) -> Vec<Ix> { - let mut ixs = Vec::new(); - - let mut node_ix = self.start; - - while let Some(n_ix) = node_ix { - ixs.push(n_ix); - - node_ix = container[n_ix].pos_mut().next; - } - - ixs - } - } -} diff --git a/vendor/petgraph/src/algo/floyd_warshall.rs b/vendor/petgraph/src/algo/floyd_warshall.rs deleted file mode 100644 index 2ac94d50..00000000 --- a/vendor/petgraph/src/algo/floyd_warshall.rs +++ /dev/null @@ -1,143 +0,0 @@ -use std::collections::HashMap; - -use std::hash::Hash; - -use crate::algo::{BoundedMeasure, NegativeCycle}; -use crate::visit::{ - EdgeRef, GraphProp, IntoEdgeReferences, IntoNodeIdentifiers, NodeCompactIndexable, -}; - -#[allow(clippy::type_complexity, clippy::needless_range_loop)] -/// \[Generic\] [Floyd–Warshall algorithm](https://en.wikipedia.org/wiki/Floyd%E2%80%93Warshall_algorithm) is an algorithm for all pairs shortest path problem -/// -/// Compute shortest paths in a weighted graph with positive or negative edge weights (but with no negative cycles) -/// -/// # Arguments -/// * `graph`: graph with no negative cycle -/// * `edge_cost`: closure that returns cost of a particular edge -/// -/// # Returns -/// * `Ok`: (if graph contains no negative cycle) a hashmap containing all pairs shortest paths -/// * `Err`: if graph contains negative cycle. -/// -/// # Examples -/// ```rust -/// use petgraph::{prelude::*, Graph, Directed}; -/// use petgraph::algo::floyd_warshall; -/// use std::collections::HashMap; -/// -/// let mut graph: Graph<(), (), Directed> = Graph::new(); -/// let a = graph.add_node(()); -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (a, c), -/// (a, d), -/// (b, c), -/// (b, d), -/// (c, d) -/// ]); -/// -/// let weight_map: HashMap<(NodeIndex, NodeIndex), i32> = [ -/// ((a, a), 0), ((a, b), 1), ((a, c), 4), ((a, d), 10), -/// ((b, b), 0), ((b, c), 2), ((b, d), 2), -/// ((c, c), 0), ((c, d), 2) -/// ].iter().cloned().collect(); -/// // ----- b -------- -/// // | ^ | 2 -/// // | 1 | 4 v -/// // 2 | a ------> c -/// // | 10 | | 2 -/// // | v v -/// // ---> d <------- -/// -/// let inf = std::i32::MAX; -/// let expected_res: HashMap<(NodeIndex, NodeIndex), i32> = [ -/// ((a, a), 0), ((a, b), 1), ((a, c), 3), ((a, d), 3), -/// ((b, a), inf), ((b, b), 0), ((b, c), 2), ((b, d), 2), -/// ((c, a), inf), ((c, b), inf), ((c, c), 0), ((c, d), 2), -/// ((d, a), inf), ((d, b), inf), ((d, c), inf), ((d, d), 0), -/// ].iter().cloned().collect(); -/// -/// -/// let res = floyd_warshall(&graph, |edge| { -/// if let Some(weight) = weight_map.get(&(edge.source(), edge.target())) { -/// *weight -/// } else { -/// inf -/// } -/// }).unwrap(); -/// -/// let nodes = [a, b, c, d]; -/// for node1 in &nodes { -/// for node2 in &nodes { -/// assert_eq!(res.get(&(*node1, *node2)).unwrap(), expected_res.get(&(*node1, *node2)).unwrap()); -/// } -/// } -/// ``` -pub fn floyd_warshall<G, F, K>( - graph: G, - mut edge_cost: F, -) -> Result<HashMap<(G::NodeId, G::NodeId), K>, NegativeCycle> -where - G: NodeCompactIndexable + IntoEdgeReferences + IntoNodeIdentifiers + GraphProp, - G::NodeId: Eq + Hash, - F: FnMut(G::EdgeRef) -> K, - K: BoundedMeasure + Copy, -{ - let num_of_nodes = graph.node_count(); - - // |V|x|V| matrix - let mut dist = vec![vec![K::max(); num_of_nodes]; num_of_nodes]; - - // init distances of paths with no intermediate nodes - for edge in graph.edge_references() { - let i = graph.to_index(edge.source()); - let j = graph.to_index(edge.target()); - let cost = edge_cost(edge); - - if dist[i][j] > cost { - dist[i][j] = cost; - if !graph.is_directed() { - dist[j][i] = cost; - } - } - } - - // distance of each node to itself is 0(default value) - for node in graph.node_identifiers() { - dist[graph.to_index(node)][graph.to_index(node)] = K::default(); - } - - for k in 0..num_of_nodes { - for i in 0..num_of_nodes { - for j in 0..num_of_nodes { - let (result, overflow) = dist[i][k].overflowing_add(dist[k][j]); - if !overflow && dist[i][j] > result { - dist[i][j] = result; - } - } - } - } - - // value less than 0(default value) indicates a negative cycle - for i in 0..num_of_nodes { - if dist[i][i] < K::default() { - return Err(NegativeCycle(())); - } - } - - let mut distance_map: HashMap<(G::NodeId, G::NodeId), K> = - HashMap::with_capacity(num_of_nodes * num_of_nodes); - - for i in 0..num_of_nodes { - for j in 0..num_of_nodes { - distance_map.insert((graph.from_index(i), graph.from_index(j)), dist[i][j]); - } - } - - Ok(distance_map) -} diff --git a/vendor/petgraph/src/algo/ford_fulkerson.rs b/vendor/petgraph/src/algo/ford_fulkerson.rs deleted file mode 100644 index 3b2127f3..00000000 --- a/vendor/petgraph/src/algo/ford_fulkerson.rs +++ /dev/null @@ -1,196 +0,0 @@ -use std::{collections::VecDeque, ops::Sub}; - -use crate::{ - data::DataMap, - visit::{ - EdgeCount, EdgeIndexable, IntoEdges, IntoEdgesDirected, NodeCount, NodeIndexable, VisitMap, - Visitable, - }, -}; - -use super::{EdgeRef, PositiveMeasure}; -use crate::prelude::Direction; - -fn residual_capacity<N>( - network: N, - edge: N::EdgeRef, - vertex: N::NodeId, - flow: N::EdgeWeight, -) -> N::EdgeWeight -where - N: NodeIndexable + IntoEdges, - N::EdgeWeight: Sub<Output = N::EdgeWeight> + PositiveMeasure, -{ - if vertex == edge.source() { - // backward edge - flow - } else if vertex == edge.target() { - // forward edge - return *edge.weight() - flow; - } else { - let end_point = NodeIndexable::to_index(&network, vertex); - panic!("Illegal endpoint {}", end_point); - } -} - -/// Gets the other endpoint of graph edge, if any, otherwise panics. -fn other_endpoint<N>(network: N, edge: N::EdgeRef, vertex: N::NodeId) -> N::NodeId -where - N: NodeIndexable + IntoEdges, -{ - if vertex == edge.source() { - edge.target() - } else if vertex == edge.target() { - edge.source() - } else { - let end_point = NodeIndexable::to_index(&network, vertex); - panic!("Illegal endpoint {}", end_point); - } -} - -/// Tells whether there is an augmented path in the graph -fn has_augmented_path<N>( - network: N, - source: N::NodeId, - destination: N::NodeId, - edge_to: &mut [Option<N::EdgeRef>], - flows: &[N::EdgeWeight], -) -> bool -where - N: NodeCount + IntoEdgesDirected + NodeIndexable + EdgeIndexable + Visitable, - N::EdgeWeight: Sub<Output = N::EdgeWeight> + PositiveMeasure, -{ - let mut visited = network.visit_map(); - let mut queue = VecDeque::new(); - visited.visit(source); - queue.push_back(source); - - while let Some(vertex) = queue.pop_front() { - let out_edges = network.edges_directed(vertex, Direction::Outgoing); - let in_edges = network.edges_directed(vertex, Direction::Incoming); - for edge in out_edges.chain(in_edges) { - let next = other_endpoint(&network, edge, vertex); - let edge_index: usize = EdgeIndexable::to_index(&network, edge.id()); - let residual_cap = residual_capacity(&network, edge, next, flows[edge_index]); - if !visited.is_visited(&next) && (residual_cap > N::EdgeWeight::zero()) { - visited.visit(next); - edge_to[NodeIndexable::to_index(&network, next)] = Some(edge); - if destination == next { - return true; - } - queue.push_back(next); - } - } - } - false -} - -fn adjust_residual_flow<N>( - network: N, - edge: N::EdgeRef, - vertex: N::NodeId, - flow: N::EdgeWeight, - delta: N::EdgeWeight, -) -> N::EdgeWeight -where - N: NodeIndexable + IntoEdges, - N::EdgeWeight: Sub<Output = N::EdgeWeight> + PositiveMeasure, -{ - if vertex == edge.source() { - // backward edge - flow - delta - } else if vertex == edge.target() { - // forward edge - flow + delta - } else { - let end_point = NodeIndexable::to_index(&network, vertex); - panic!("Illegal endpoint {}", end_point); - } -} - -/// \[Generic\] Ford-Fulkerson algorithm. -/// -/// Computes the [maximum flow][ff] of a weighted directed graph. -/// -/// If it terminates, it returns the maximum flow and also the computed edge flows. -/// -/// [ff]: https://en.wikipedia.org/wiki/Ford%E2%80%93Fulkerson_algorithm -/// -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::ford_fulkerson; -/// // Example from CLRS book -/// let mut graph = Graph::<u8, u8>::new(); -/// let source = graph.add_node(0); -/// let _ = graph.add_node(1); -/// let _ = graph.add_node(2); -/// let _ = graph.add_node(3); -/// let _ = graph.add_node(4); -/// let destination = graph.add_node(5); -/// graph.extend_with_edges(&[ -/// (0, 1, 16), -/// (0, 2, 13), -/// (1, 2, 10), -/// (1, 3, 12), -/// (2, 1, 4), -/// (2, 4, 14), -/// (3, 2, 9), -/// (3, 5, 20), -/// (4, 3, 7), -/// (4, 5, 4), -/// ]); -/// let (max_flow, _) = ford_fulkerson(&graph, source, destination); -/// assert_eq!(23, max_flow); -/// ``` -pub fn ford_fulkerson<N>( - network: N, - source: N::NodeId, - destination: N::NodeId, -) -> (N::EdgeWeight, Vec<N::EdgeWeight>) -where - N: NodeCount - + EdgeCount - + IntoEdgesDirected - + EdgeIndexable - + NodeIndexable - + DataMap - + Visitable, - N::EdgeWeight: Sub<Output = N::EdgeWeight> + PositiveMeasure, -{ - let mut edge_to = vec![None; network.node_count()]; - let mut flows = vec![N::EdgeWeight::zero(); network.edge_count()]; - let mut max_flow = N::EdgeWeight::zero(); - while has_augmented_path(&network, source, destination, &mut edge_to, &flows) { - let mut path_flow = N::EdgeWeight::max(); - - // Find the bottleneck capacity of the path - let mut vertex = destination; - let mut vertex_index = NodeIndexable::to_index(&network, vertex); - while let Some(edge) = edge_to[vertex_index] { - let edge_index = EdgeIndexable::to_index(&network, edge.id()); - let residual_capacity = residual_capacity(&network, edge, vertex, flows[edge_index]); - // Minimum between the current path flow and the residual capacity. - path_flow = if path_flow > residual_capacity { - residual_capacity - } else { - path_flow - }; - vertex = other_endpoint(&network, edge, vertex); - vertex_index = NodeIndexable::to_index(&network, vertex); - } - - // Update the flow of each edge along the path - let mut vertex = destination; - let mut vertex_index = NodeIndexable::to_index(&network, vertex); - while let Some(edge) = edge_to[vertex_index] { - let edge_index = EdgeIndexable::to_index(&network, edge.id()); - flows[edge_index] = - adjust_residual_flow(&network, edge, vertex, flows[edge_index], path_flow); - vertex = other_endpoint(&network, edge, vertex); - vertex_index = NodeIndexable::to_index(&network, vertex); - } - max_flow = max_flow + path_flow; - } - (max_flow, flows) -} diff --git a/vendor/petgraph/src/algo/isomorphism.rs b/vendor/petgraph/src/algo/isomorphism.rs deleted file mode 100644 index 76ca2c99..00000000 --- a/vendor/petgraph/src/algo/isomorphism.rs +++ /dev/null @@ -1,994 +0,0 @@ -use std::convert::TryFrom; - -use crate::data::DataMap; -use crate::visit::EdgeCount; -use crate::visit::EdgeRef; -use crate::visit::GetAdjacencyMatrix; -use crate::visit::GraphBase; -use crate::visit::GraphProp; -use crate::visit::IntoEdgesDirected; -use crate::visit::IntoNeighborsDirected; -use crate::visit::NodeCompactIndexable; -use crate::{Incoming, Outgoing}; - -use self::semantic::EdgeMatcher; -use self::semantic::NoSemanticMatch; -use self::semantic::NodeMatcher; -use self::state::Vf2State; - -mod state { - use super::*; - - #[derive(Debug)] - // TODO: make mapping generic over the index type of the other graph. - pub struct Vf2State<'a, G: GetAdjacencyMatrix> { - /// A reference to the graph this state was built from. - pub graph: &'a G, - /// The current mapping M(s) of nodes from G0 → G1 and G1 → G0, - /// `usize::MAX` for no mapping. - pub mapping: Vec<usize>, - /// out[i] is non-zero if i is in either M_0(s) or Tout_0(s) - /// These are all the next vertices that are not mapped yet, but - /// have an outgoing edge from the mapping. - out: Vec<usize>, - /// ins[i] is non-zero if i is in either M_0(s) or Tin_0(s) - /// These are all the incoming vertices, those not mapped yet, but - /// have an edge from them into the mapping. - /// Unused if graph is undirected -- it's identical with out in that case. - ins: Vec<usize>, - pub out_size: usize, - pub ins_size: usize, - pub adjacency_matrix: G::AdjMatrix, - generation: usize, - } - - impl<'a, G> Vf2State<'a, G> - where - G: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - { - pub fn new(g: &'a G) -> Self { - let c0 = g.node_count(); - Vf2State { - graph: g, - mapping: vec![std::usize::MAX; c0], - out: vec![0; c0], - ins: vec![0; c0 * (g.is_directed() as usize)], - out_size: 0, - ins_size: 0, - adjacency_matrix: g.adjacency_matrix(), - generation: 0, - } - } - - /// Return **true** if we have a complete mapping - pub fn is_complete(&self) -> bool { - self.generation == self.mapping.len() - } - - /// Add mapping **from** <-> **to** to the state. - pub fn push_mapping(&mut self, from: G::NodeId, to: usize) { - self.generation += 1; - self.mapping[self.graph.to_index(from)] = to; - // update T0 & T1 ins/outs - // T0out: Node in G0 not in M0 but successor of a node in M0. - // st.out[0]: Node either in M0 or successor of M0 - for ix in self.graph.neighbors_directed(from, Outgoing) { - if self.out[self.graph.to_index(ix)] == 0 { - self.out[self.graph.to_index(ix)] = self.generation; - self.out_size += 1; - } - } - if self.graph.is_directed() { - for ix in self.graph.neighbors_directed(from, Incoming) { - if self.ins[self.graph.to_index(ix)] == 0 { - self.ins[self.graph.to_index(ix)] = self.generation; - self.ins_size += 1; - } - } - } - } - - /// Restore the state to before the last added mapping - pub fn pop_mapping(&mut self, from: G::NodeId) { - // undo (n, m) mapping - self.mapping[self.graph.to_index(from)] = std::usize::MAX; - - // unmark in ins and outs - for ix in self.graph.neighbors_directed(from, Outgoing) { - if self.out[self.graph.to_index(ix)] == self.generation { - self.out[self.graph.to_index(ix)] = 0; - self.out_size -= 1; - } - } - if self.graph.is_directed() { - for ix in self.graph.neighbors_directed(from, Incoming) { - if self.ins[self.graph.to_index(ix)] == self.generation { - self.ins[self.graph.to_index(ix)] = 0; - self.ins_size -= 1; - } - } - } - - self.generation -= 1; - } - - /// Find the next (least) node in the Tout set. - pub fn next_out_index(&self, from_index: usize) -> Option<usize> { - self.out[from_index..] - .iter() - .enumerate() - .find(move |&(index, &elt)| { - elt > 0 && self.mapping[from_index + index] == std::usize::MAX - }) - .map(|(index, _)| index) - } - - /// Find the next (least) node in the Tin set. - pub fn next_in_index(&self, from_index: usize) -> Option<usize> { - if !self.graph.is_directed() { - return None; - } - self.ins[from_index..] - .iter() - .enumerate() - .find(move |&(index, &elt)| { - elt > 0 && self.mapping[from_index + index] == std::usize::MAX - }) - .map(|(index, _)| index) - } - - /// Find the next (least) node in the N - M set. - pub fn next_rest_index(&self, from_index: usize) -> Option<usize> { - self.mapping[from_index..] - .iter() - .enumerate() - .find(|&(_, &elt)| elt == std::usize::MAX) - .map(|(index, _)| index) - } - } -} - -mod semantic { - use super::*; - - pub struct NoSemanticMatch; - - pub trait NodeMatcher<G0: GraphBase, G1: GraphBase> { - fn enabled() -> bool; - fn eq(&mut self, _g0: &G0, _g1: &G1, _n0: G0::NodeId, _n1: G1::NodeId) -> bool; - } - - impl<G0: GraphBase, G1: GraphBase> NodeMatcher<G0, G1> for NoSemanticMatch { - #[inline] - fn enabled() -> bool { - false - } - #[inline] - fn eq(&mut self, _g0: &G0, _g1: &G1, _n0: G0::NodeId, _n1: G1::NodeId) -> bool { - true - } - } - - impl<G0, G1, F> NodeMatcher<G0, G1> for F - where - G0: GraphBase + DataMap, - G1: GraphBase + DataMap, - F: FnMut(&G0::NodeWeight, &G1::NodeWeight) -> bool, - { - #[inline] - fn enabled() -> bool { - true - } - #[inline] - fn eq(&mut self, g0: &G0, g1: &G1, n0: G0::NodeId, n1: G1::NodeId) -> bool { - if let (Some(x), Some(y)) = (g0.node_weight(n0), g1.node_weight(n1)) { - self(x, y) - } else { - false - } - } - } - - pub trait EdgeMatcher<G0: GraphBase, G1: GraphBase> { - fn enabled() -> bool; - fn eq( - &mut self, - _g0: &G0, - _g1: &G1, - e0: (G0::NodeId, G0::NodeId), - e1: (G1::NodeId, G1::NodeId), - ) -> bool; - } - - impl<G0: GraphBase, G1: GraphBase> EdgeMatcher<G0, G1> for NoSemanticMatch { - #[inline] - fn enabled() -> bool { - false - } - #[inline] - fn eq( - &mut self, - _g0: &G0, - _g1: &G1, - _e0: (G0::NodeId, G0::NodeId), - _e1: (G1::NodeId, G1::NodeId), - ) -> bool { - true - } - } - - impl<G0, G1, F> EdgeMatcher<G0, G1> for F - where - G0: GraphBase + DataMap + IntoEdgesDirected, - G1: GraphBase + DataMap + IntoEdgesDirected, - F: FnMut(&G0::EdgeWeight, &G1::EdgeWeight) -> bool, - { - #[inline] - fn enabled() -> bool { - true - } - #[inline] - fn eq( - &mut self, - g0: &G0, - g1: &G1, - e0: (G0::NodeId, G0::NodeId), - e1: (G1::NodeId, G1::NodeId), - ) -> bool { - let w0 = g0 - .edges_directed(e0.0, Outgoing) - .find(|edge| edge.target() == e0.1) - .and_then(|edge| g0.edge_weight(edge.id())); - let w1 = g1 - .edges_directed(e1.0, Outgoing) - .find(|edge| edge.target() == e1.1) - .and_then(|edge| g1.edge_weight(edge.id())); - if let (Some(x), Some(y)) = (w0, w1) { - self(x, y) - } else { - false - } - } - } -} - -mod matching { - use super::*; - - #[derive(Copy, Clone, PartialEq, Debug)] - enum OpenList { - Out, - In, - Other, - } - - #[derive(Clone, PartialEq, Debug)] - enum Frame<G0, G1> - where - G0: GraphBase, - G1: GraphBase, - { - Outer, - Inner { - nodes: (G0::NodeId, G1::NodeId), - open_list: OpenList, - }, - Unwind { - nodes: (G0::NodeId, G1::NodeId), - open_list: OpenList, - }, - } - - fn is_feasible<G0, G1, NM, EM>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - nodes: (G0::NodeId, G1::NodeId), - node_match: &mut NM, - edge_match: &mut EM, - ) -> bool - where - G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - NM: NodeMatcher<G0, G1>, - EM: EdgeMatcher<G0, G1>, - { - macro_rules! field { - ($x:ident, 0) => { - $x.0 - }; - ($x:ident, 1) => { - $x.1 - }; - ($x:ident, 1 - 0) => { - $x.1 - }; - ($x:ident, 1 - 1) => { - $x.0 - }; - } - - macro_rules! r_succ { - ($j:tt) => {{ - let mut succ_count = 0; - for n_neigh in field!(st, $j) - .graph - .neighbors_directed(field!(nodes, $j), Outgoing) - { - succ_count += 1; - // handle the self loop case; it's not in the mapping (yet) - let m_neigh = if field!(nodes, $j) != n_neigh { - field!(st, $j).mapping[field!(st, $j).graph.to_index(n_neigh)] - } else { - field!(st, 1 - $j).graph.to_index(field!(nodes, 1 - $j)) - }; - if m_neigh == std::usize::MAX { - continue; - } - let has_edge = field!(st, 1 - $j).graph.is_adjacent( - &field!(st, 1 - $j).adjacency_matrix, - field!(nodes, 1 - $j), - field!(st, 1 - $j).graph.from_index(m_neigh), - ); - if !has_edge { - return false; - } - } - succ_count - }}; - } - - macro_rules! r_pred { - ($j:tt) => {{ - let mut pred_count = 0; - for n_neigh in field!(st, $j) - .graph - .neighbors_directed(field!(nodes, $j), Incoming) - { - pred_count += 1; - // the self loop case is handled in outgoing - let m_neigh = field!(st, $j).mapping[field!(st, $j).graph.to_index(n_neigh)]; - if m_neigh == std::usize::MAX { - continue; - } - let has_edge = field!(st, 1 - $j).graph.is_adjacent( - &field!(st, 1 - $j).adjacency_matrix, - field!(st, 1 - $j).graph.from_index(m_neigh), - field!(nodes, 1 - $j), - ); - if !has_edge { - return false; - } - } - pred_count - }}; - } - - // Check syntactic feasibility of mapping by ensuring adjacencies - // of nx map to adjacencies of mx. - // - // nx == map to => mx - // - // R_succ - // - // Check that every neighbor of nx is mapped to a neighbor of mx, - // then check the reverse, from mx to nx. Check that they have the same - // count of edges. - // - // Note: We want to check the lookahead measures here if we can, - // R_out: Equal for G0, G1: Card(Succ(G, n) ^ Tout); for both Succ and Pred - // R_in: Same with Tin - // R_new: Equal for G0, G1: Ñ n Pred(G, n); both Succ and Pred, - // Ñ is G0 - M - Tin - Tout - // last attempt to add these did not speed up any of the testcases - if r_succ!(0) > r_succ!(1) { - return false; - } - // R_pred - if st.0.graph.is_directed() && r_pred!(0) > r_pred!(1) { - return false; - } - - // // semantic feasibility: compare associated data for nodes - if NM::enabled() && !node_match.eq(st.0.graph, st.1.graph, nodes.0, nodes.1) { - return false; - } - // semantic feasibility: compare associated data for edges - if EM::enabled() { - macro_rules! edge_feasibility { - ($j:tt) => {{ - for n_neigh in field!(st, $j) - .graph - .neighbors_directed(field!(nodes, $j), Outgoing) - { - let m_neigh = if field!(nodes, $j) != n_neigh { - field!(st, $j).mapping[field!(st, $j).graph.to_index(n_neigh)] - } else { - field!(st, 1 - $j).graph.to_index(field!(nodes, 1 - $j)) - }; - if m_neigh == std::usize::MAX { - continue; - } - - let e0 = (field!(nodes, $j), n_neigh); - let e1 = ( - field!(nodes, 1 - $j), - field!(st, 1 - $j).graph.from_index(m_neigh), - ); - let edges = (e0, e1); - if !edge_match.eq( - st.0.graph, - st.1.graph, - field!(edges, $j), - field!(edges, 1 - $j), - ) { - return false; - } - } - if field!(st, $j).graph.is_directed() { - for n_neigh in field!(st, $j) - .graph - .neighbors_directed(field!(nodes, $j), Incoming) - { - // the self loop case is handled in outgoing - let m_neigh = - field!(st, $j).mapping[field!(st, $j).graph.to_index(n_neigh)]; - if m_neigh == std::usize::MAX { - continue; - } - - let e0 = (n_neigh, field!(nodes, $j)); - let e1 = ( - field!(st, 1 - $j).graph.from_index(m_neigh), - field!(nodes, 1 - $j), - ); - let edges = (e0, e1); - if !edge_match.eq( - st.0.graph, - st.1.graph, - field!(edges, $j), - field!(edges, 1 - $j), - ) { - return false; - } - } - } - }}; - } - - edge_feasibility!(0); - edge_feasibility!(1); - } - true - } - - fn next_candidate<G0, G1>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - ) -> Option<(G0::NodeId, G1::NodeId, OpenList)> - where - G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - { - let mut from_index = None; - let mut open_list = OpenList::Out; - let mut to_index = st.1.next_out_index(0); - - // Try the out list - if to_index.is_some() { - from_index = st.0.next_out_index(0); - open_list = OpenList::Out; - } - // Try the in list - if to_index.is_none() || from_index.is_none() { - to_index = st.1.next_in_index(0); - - if to_index.is_some() { - from_index = st.0.next_in_index(0); - open_list = OpenList::In; - } - } - // Try the other list -- disconnected graph - if to_index.is_none() || from_index.is_none() { - to_index = st.1.next_rest_index(0); - if to_index.is_some() { - from_index = st.0.next_rest_index(0); - open_list = OpenList::Other; - } - } - match (from_index, to_index) { - (Some(n), Some(m)) => Some(( - st.0.graph.from_index(n), - st.1.graph.from_index(m), - open_list, - )), - // No more candidates - _ => None, - } - } - - fn next_from_ix<G0, G1>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - nx: G1::NodeId, - open_list: OpenList, - ) -> Option<G1::NodeId> - where - G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - { - // Find the next node index to try on the `to` side of the mapping - let start = st.1.graph.to_index(nx) + 1; - let cand1 = match open_list { - OpenList::Out => st.1.next_out_index(start), - OpenList::In => st.1.next_in_index(start), - OpenList::Other => st.1.next_rest_index(start), - } - .map(|c| c + start); // compensate for start offset. - match cand1 { - None => None, // no more candidates - Some(ix) => { - debug_assert!(ix >= start); - Some(st.1.graph.from_index(ix)) - } - } - } - - fn pop_state<G0, G1>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - nodes: (G0::NodeId, G1::NodeId), - ) where - G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - { - st.0.pop_mapping(nodes.0); - st.1.pop_mapping(nodes.1); - } - - fn push_state<G0, G1>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - nodes: (G0::NodeId, G1::NodeId), - ) where - G0: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - G1: GetAdjacencyMatrix + GraphProp + NodeCompactIndexable + IntoNeighborsDirected, - { - st.0.push_mapping(nodes.0, st.1.graph.to_index(nodes.1)); - st.1.push_mapping(nodes.1, st.0.graph.to_index(nodes.0)); - } - - /// Return Some(bool) if isomorphism is decided, else None. - pub fn try_match<G0, G1, NM, EM>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - node_match: &mut NM, - edge_match: &mut EM, - match_subgraph: bool, - ) -> Option<bool> - where - G0: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - NM: NodeMatcher<G0, G1>, - EM: EdgeMatcher<G0, G1>, - { - let mut stack = vec![Frame::Outer]; - if isomorphisms(st, node_match, edge_match, match_subgraph, &mut stack).is_some() { - Some(true) - } else { - None - } - } - - fn isomorphisms<G0, G1, NM, EM>( - st: &mut (Vf2State<'_, G0>, Vf2State<'_, G1>), - node_match: &mut NM, - edge_match: &mut EM, - match_subgraph: bool, - stack: &mut Vec<Frame<G0, G1>>, - ) -> Option<Vec<usize>> - where - G0: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - NM: NodeMatcher<G0, G1>, - EM: EdgeMatcher<G0, G1>, - { - if st.0.is_complete() { - return Some(st.0.mapping.clone()); - } - - // A "depth first" search of a valid mapping from graph 1 to graph 2 - // F(s, n, m) -- evaluate state s and add mapping n <-> m - // Find least T1out node (in st.out[1] but not in M[1]) - let mut result = None; - while let Some(frame) = stack.pop() { - match frame { - Frame::Unwind { nodes, open_list } => { - pop_state(st, nodes); - - match next_from_ix(st, nodes.1, open_list) { - None => continue, - Some(nx) => { - let f = Frame::Inner { - nodes: (nodes.0, nx), - open_list, - }; - stack.push(f); - } - } - } - Frame::Outer => match next_candidate(st) { - None => continue, - Some((nx, mx, open_list)) => { - let f = Frame::Inner { - nodes: (nx, mx), - open_list, - }; - stack.push(f); - } - }, - Frame::Inner { nodes, open_list } => { - if is_feasible(st, nodes, node_match, edge_match) { - push_state(st, nodes); - if st.0.is_complete() { - result = Some(st.0.mapping.clone()); - } - // Check cardinalities of Tin, Tout sets - if (!match_subgraph - && st.0.out_size == st.1.out_size - && st.0.ins_size == st.1.ins_size) - || (match_subgraph - && st.0.out_size <= st.1.out_size - && st.0.ins_size <= st.1.ins_size) - { - let f0 = Frame::Unwind { nodes, open_list }; - stack.push(f0); - stack.push(Frame::Outer); - continue; - } - pop_state(st, nodes); - } - match next_from_ix(st, nodes.1, open_list) { - None => continue, - Some(nx) => { - let f = Frame::Inner { - nodes: (nodes.0, nx), - open_list, - }; - stack.push(f); - } - } - } - } - if result.is_some() { - return result; - } - } - result - } - - pub struct GraphMatcher<'a, 'b, 'c, G0, G1, NM, EM> - where - G0: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - NM: NodeMatcher<G0, G1>, - EM: EdgeMatcher<G0, G1>, - { - st: (Vf2State<'a, G0>, Vf2State<'b, G1>), - node_match: &'c mut NM, - edge_match: &'c mut EM, - match_subgraph: bool, - stack: Vec<Frame<G0, G1>>, - } - - impl<'a, 'b, 'c, G0, G1, NM, EM> GraphMatcher<'a, 'b, 'c, G0, G1, NM, EM> - where - G0: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - NM: NodeMatcher<G0, G1>, - EM: EdgeMatcher<G0, G1>, - { - pub fn new( - g0: &'a G0, - g1: &'b G1, - node_match: &'c mut NM, - edge_match: &'c mut EM, - match_subgraph: bool, - ) -> Self { - let stack = vec![Frame::Outer]; - Self { - st: (Vf2State::new(g0), Vf2State::new(g1)), - node_match, - edge_match, - match_subgraph, - stack, - } - } - } - - impl<G0, G1, NM, EM> Iterator for GraphMatcher<'_, '_, '_, G0, G1, NM, EM> - where - G0: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp - + IntoNeighborsDirected, - NM: NodeMatcher<G0, G1>, - EM: EdgeMatcher<G0, G1>, - { - type Item = Vec<usize>; - - fn next(&mut self) -> Option<Self::Item> { - isomorphisms( - &mut self.st, - self.node_match, - self.edge_match, - self.match_subgraph, - &mut self.stack, - ) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - // To calculate the upper bound of results we use n! where n is the - // number of nodes in graph 1. n! values fit into a 64-bit usize up - // to n = 20, so we don't estimate an upper limit for n > 20. - let n = self.st.0.graph.node_count(); - - // We hardcode n! values into an array that accounts for architectures - // with smaller usizes to get our upper bound. - let upper_bounds: Vec<Option<usize>> = [ - 1u64, - 1, - 2, - 6, - 24, - 120, - 720, - 5040, - 40320, - 362880, - 3628800, - 39916800, - 479001600, - 6227020800, - 87178291200, - 1307674368000, - 20922789888000, - 355687428096000, - 6402373705728000, - 121645100408832000, - 2432902008176640000, - ] - .iter() - .map(|n| usize::try_from(*n).ok()) - .collect(); - - if n > upper_bounds.len() { - return (0, None); - } - - (0, upper_bounds[n]) - } - } -} - -/// \[Generic\] Return `true` if the graphs `g0` and `g1` are isomorphic. -/// -/// Using the VF2 algorithm, only matching graph syntactically (graph -/// structure). -/// -/// The graphs should not be multigraphs. -/// -/// **Reference** -/// -/// * Luigi P. Cordella, Pasquale Foggia, Carlo Sansone, Mario Vento; -/// *A (Sub)Graph Isomorphism Algorithm for Matching Large Graphs* -pub fn is_isomorphic<G0, G1>(g0: G0, g1: G1) -> bool -where - G0: NodeCompactIndexable + EdgeCount + GetAdjacencyMatrix + GraphProp + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp<EdgeType = G0::EdgeType> - + IntoNeighborsDirected, -{ - if g0.node_count() != g1.node_count() || g0.edge_count() != g1.edge_count() { - return false; - } - - let mut st = (Vf2State::new(&g0), Vf2State::new(&g1)); - self::matching::try_match(&mut st, &mut NoSemanticMatch, &mut NoSemanticMatch, false) - .unwrap_or(false) -} - -/// \[Generic\] Return `true` if the graphs `g0` and `g1` are isomorphic. -/// -/// Using the VF2 algorithm, examining both syntactic and semantic -/// graph isomorphism (graph structure and matching node and edge weights). -/// -/// The graphs should not be multigraphs. -pub fn is_isomorphic_matching<G0, G1, NM, EM>( - g0: G0, - g1: G1, - mut node_match: NM, - mut edge_match: EM, -) -> bool -where - G0: NodeCompactIndexable - + EdgeCount - + DataMap - + GetAdjacencyMatrix - + GraphProp - + IntoEdgesDirected, - G1: NodeCompactIndexable - + EdgeCount - + DataMap - + GetAdjacencyMatrix - + GraphProp<EdgeType = G0::EdgeType> - + IntoEdgesDirected, - NM: FnMut(&G0::NodeWeight, &G1::NodeWeight) -> bool, - EM: FnMut(&G0::EdgeWeight, &G1::EdgeWeight) -> bool, -{ - if g0.node_count() != g1.node_count() || g0.edge_count() != g1.edge_count() { - return false; - } - - let mut st = (Vf2State::new(&g0), Vf2State::new(&g1)); - self::matching::try_match(&mut st, &mut node_match, &mut edge_match, false).unwrap_or(false) -} - -/// \[Generic\] Return `true` if `g0` is isomorphic to a subgraph of `g1`. -/// -/// Using the VF2 algorithm, only matching graph syntactically (graph -/// structure). -/// -/// The graphs should not be multigraphs. -/// -/// # Subgraph isomorphism -/// -/// (adapted from [`networkx` documentation](https://networkx.github.io/documentation/stable/reference/algorithms/isomorphism.vf2.html)) -/// -/// Graph theory literature can be ambiguous about the meaning of the above statement, -/// and we seek to clarify it now. -/// -/// In the VF2 literature, a mapping **M** is said to be a *graph-subgraph isomorphism* -/// iff **M** is an isomorphism between **G2** and a subgraph of **G1**. Thus, to say -/// that **G1** and **G2** are graph-subgraph isomorphic is to say that a subgraph of -/// **G1** is isomorphic to **G2**. -/// -/// Other literature uses the phrase ‘subgraph isomorphic’ as in -/// ‘**G1** does not have a subgraph isomorphic to **G2**’. Another use is as an in adverb -/// for isomorphic. Thus, to say that **G1** and **G2** are subgraph isomorphic is to say -/// that a subgraph of **G1** is isomorphic to **G2**. -/// -/// Finally, the term ‘subgraph’ can have multiple meanings. In this context, -/// ‘subgraph’ always means a ‘node-induced subgraph’. Edge-induced subgraph -/// isomorphisms are not directly supported. For subgraphs which are not -/// induced, the term ‘monomorphism’ is preferred over ‘isomorphism’. -/// -/// **Reference** -/// -/// * Luigi P. Cordella, Pasquale Foggia, Carlo Sansone, Mario Vento; -/// *A (Sub)Graph Isomorphism Algorithm for Matching Large Graphs* -pub fn is_isomorphic_subgraph<G0, G1>(g0: G0, g1: G1) -> bool -where - G0: NodeCompactIndexable + EdgeCount + GetAdjacencyMatrix + GraphProp + IntoNeighborsDirected, - G1: NodeCompactIndexable - + EdgeCount - + GetAdjacencyMatrix - + GraphProp<EdgeType = G0::EdgeType> - + IntoNeighborsDirected, -{ - if g0.node_count() > g1.node_count() || g0.edge_count() > g1.edge_count() { - return false; - } - - let mut st = (Vf2State::new(&g0), Vf2State::new(&g1)); - self::matching::try_match(&mut st, &mut NoSemanticMatch, &mut NoSemanticMatch, true) - .unwrap_or(false) -} - -/// \[Generic\] Return `true` if `g0` is isomorphic to a subgraph of `g1`. -/// -/// Using the VF2 algorithm, examining both syntactic and semantic -/// graph isomorphism (graph structure and matching node and edge weights). -/// -/// The graphs should not be multigraphs. -pub fn is_isomorphic_subgraph_matching<G0, G1, NM, EM>( - g0: G0, - g1: G1, - mut node_match: NM, - mut edge_match: EM, -) -> bool -where - G0: NodeCompactIndexable - + EdgeCount - + DataMap - + GetAdjacencyMatrix - + GraphProp - + IntoEdgesDirected, - G1: NodeCompactIndexable - + EdgeCount - + DataMap - + GetAdjacencyMatrix - + GraphProp<EdgeType = G0::EdgeType> - + IntoEdgesDirected, - NM: FnMut(&G0::NodeWeight, &G1::NodeWeight) -> bool, - EM: FnMut(&G0::EdgeWeight, &G1::EdgeWeight) -> bool, -{ - if g0.node_count() > g1.node_count() || g0.edge_count() > g1.edge_count() { - return false; - } - - let mut st = (Vf2State::new(&g0), Vf2State::new(&g1)); - self::matching::try_match(&mut st, &mut node_match, &mut edge_match, true).unwrap_or(false) -} - -/// Using the VF2 algorithm, examine both syntactic and semantic graph -/// isomorphism (graph structure and matching node and edge weights) and, -/// if `g0` is isomorphic to a subgraph of `g1`, return the mappings between -/// them. -/// -/// The graphs should not be multigraphs. -pub fn subgraph_isomorphisms_iter<'a, G0, G1, NM, EM>( - g0: &'a G0, - g1: &'a G1, - node_match: &'a mut NM, - edge_match: &'a mut EM, -) -> Option<impl Iterator<Item = Vec<usize>> + 'a> -where - G0: 'a - + NodeCompactIndexable - + EdgeCount - + DataMap - + GetAdjacencyMatrix - + GraphProp - + IntoEdgesDirected, - G1: 'a - + NodeCompactIndexable - + EdgeCount - + DataMap - + GetAdjacencyMatrix - + GraphProp<EdgeType = G0::EdgeType> - + IntoEdgesDirected, - NM: 'a + FnMut(&G0::NodeWeight, &G1::NodeWeight) -> bool, - EM: 'a + FnMut(&G0::EdgeWeight, &G1::EdgeWeight) -> bool, -{ - if g0.node_count() > g1.node_count() || g0.edge_count() > g1.edge_count() { - return None; - } - - Some(self::matching::GraphMatcher::new( - g0, g1, node_match, edge_match, true, - )) -} diff --git a/vendor/petgraph/src/algo/k_shortest_path.rs b/vendor/petgraph/src/algo/k_shortest_path.rs deleted file mode 100644 index 1243eec6..00000000 --- a/vendor/petgraph/src/algo/k_shortest_path.rs +++ /dev/null @@ -1,115 +0,0 @@ -use std::collections::{BinaryHeap, HashMap}; - -use std::hash::Hash; - -use crate::algo::Measure; -use crate::scored::MinScored; -use crate::visit::{EdgeRef, IntoEdges, NodeCount, NodeIndexable, Visitable}; - -/// \[Generic\] k'th shortest path algorithm. -/// -/// Compute the length of the k'th shortest path from `start` to every reachable -/// node. -/// -/// The graph should be `Visitable` and implement `IntoEdges`. The function -/// `edge_cost` should return the cost for a particular edge, which is used -/// to compute path costs. Edge costs must be non-negative. -/// -/// If `goal` is not `None`, then the algorithm terminates once the `goal` node's -/// cost is calculated. -/// -/// Computes in **O(k * (|E| + |V|*log(|V|)))** time (average). -/// -/// Returns a `HashMap` that maps `NodeId` to path cost. -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::k_shortest_path; -/// use petgraph::prelude::*; -/// use std::collections::HashMap; -/// -/// let mut graph : Graph<(),(),Directed>= Graph::new(); -/// let a = graph.add_node(()); // node with no weight -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// let e = graph.add_node(()); -/// let f = graph.add_node(()); -/// let g = graph.add_node(()); -/// let h = graph.add_node(()); -/// // z will be in another connected component -/// let z = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (b, c), -/// (c, d), -/// (d, a), -/// (e, f), -/// (b, e), -/// (f, g), -/// (g, h), -/// (h, e) -/// ]); -/// // a ----> b ----> e ----> f -/// // ^ | ^ | -/// // | v | v -/// // d <---- c h <---- g -/// -/// let expected_res: HashMap<NodeIndex, usize> = [ -/// (a, 7), -/// (b, 4), -/// (c, 5), -/// (d, 6), -/// (e, 5), -/// (f, 6), -/// (g, 7), -/// (h, 8) -/// ].iter().cloned().collect(); -/// let res = k_shortest_path(&graph,b,None,2, |_| 1); -/// assert_eq!(res, expected_res); -/// // z is not inside res because there is not path from b to z. -/// ``` -pub fn k_shortest_path<G, F, K>( - graph: G, - start: G::NodeId, - goal: Option<G::NodeId>, - k: usize, - mut edge_cost: F, -) -> HashMap<G::NodeId, K> -where - G: IntoEdges + Visitable + NodeCount + NodeIndexable, - G::NodeId: Eq + Hash, - F: FnMut(G::EdgeRef) -> K, - K: Measure + Copy, -{ - let mut counter: Vec<usize> = vec![0; graph.node_count()]; - let mut scores = HashMap::new(); - let mut visit_next = BinaryHeap::new(); - let zero_score = K::default(); - - visit_next.push(MinScored(zero_score, start)); - - while let Some(MinScored(node_score, node)) = visit_next.pop() { - counter[graph.to_index(node)] += 1; - let current_counter = counter[graph.to_index(node)]; - - if current_counter > k { - continue; - } - - if current_counter == k { - scores.insert(node, node_score); - } - - //Already reached goal k times - if goal.as_ref() == Some(&node) && current_counter == k { - break; - } - - for edge in graph.edges(node) { - visit_next.push(MinScored(node_score + edge_cost(edge), edge.target())); - } - } - scores -} diff --git a/vendor/petgraph/src/algo/matching.rs b/vendor/petgraph/src/algo/matching.rs deleted file mode 100644 index b5751a5c..00000000 --- a/vendor/petgraph/src/algo/matching.rs +++ /dev/null @@ -1,606 +0,0 @@ -use std::collections::VecDeque; -use std::hash::Hash; - -use crate::visit::{ - EdgeRef, GraphBase, IntoEdges, IntoNeighbors, IntoNodeIdentifiers, NodeCount, NodeIndexable, - VisitMap, Visitable, -}; - -/// Computed -/// [*matching*](https://en.wikipedia.org/wiki/Matching_(graph_theory)#Definitions) -/// of the graph. -pub struct Matching<G: GraphBase> { - graph: G, - mate: Vec<Option<G::NodeId>>, - n_edges: usize, -} - -impl<G> Matching<G> -where - G: GraphBase, -{ - fn new(graph: G, mate: Vec<Option<G::NodeId>>, n_edges: usize) -> Self { - Self { - graph, - mate, - n_edges, - } - } -} - -impl<G> Matching<G> -where - G: NodeIndexable, -{ - /// Gets the matched counterpart of given node, if there is any. - /// - /// Returns `None` if the node is not matched or does not exist. - pub fn mate(&self, node: G::NodeId) -> Option<G::NodeId> { - self.mate.get(self.graph.to_index(node)).and_then(|&id| id) - } - - /// Iterates over all edges from the matching. - /// - /// An edge is represented by its endpoints. The graph is considered - /// undirected and every pair of matched nodes is reported only once. - pub fn edges(&self) -> MatchedEdges<'_, G> { - MatchedEdges { - graph: &self.graph, - mate: self.mate.as_slice(), - current: 0, - } - } - - /// Iterates over all nodes from the matching. - pub fn nodes(&self) -> MatchedNodes<'_, G> { - MatchedNodes { - graph: &self.graph, - mate: self.mate.as_slice(), - current: 0, - } - } - - /// Returns `true` if given edge is in the matching, or `false` otherwise. - /// - /// If any of the nodes does not exist, `false` is returned. - pub fn contains_edge(&self, a: G::NodeId, b: G::NodeId) -> bool { - match self.mate(a) { - Some(mate) => mate == b, - None => false, - } - } - - /// Returns `true` if given node is in the matching, or `false` otherwise. - /// - /// If the node does not exist, `false` is returned. - pub fn contains_node(&self, node: G::NodeId) -> bool { - self.mate(node).is_some() - } - - /// Gets the number of matched **edges**. - pub fn len(&self) -> usize { - self.n_edges - } - - /// Returns `true` if the number of matched **edges** is 0. - pub fn is_empty(&self) -> bool { - self.len() == 0 - } -} - -impl<G> Matching<G> -where - G: NodeCount, -{ - /// Returns `true` if the matching is perfect. - /// - /// A matching is - /// [*perfect*](https://en.wikipedia.org/wiki/Matching_(graph_theory)#Definitions) - /// if every node in the graph is incident to an edge from the matching. - pub fn is_perfect(&self) -> bool { - let n_nodes = self.graph.node_count(); - n_nodes % 2 == 0 && self.n_edges == n_nodes / 2 - } -} - -trait WithDummy: NodeIndexable { - fn dummy_idx(&self) -> usize; - /// Convert `i` to a node index, returns None for the dummy node - fn try_from_index(&self, i: usize) -> Option<Self::NodeId>; -} - -impl<G: NodeIndexable> WithDummy for G { - fn dummy_idx(&self) -> usize { - // Gabow numbers the vertices from 1 to n, and uses 0 as the dummy - // vertex. Our vertex indices are zero-based and so we use the node - // bound as the dummy node. - self.node_bound() - } - - fn try_from_index(&self, i: usize) -> Option<Self::NodeId> { - if i != self.dummy_idx() { - Some(self.from_index(i)) - } else { - None - } - } -} - -pub struct MatchedNodes<'a, G: GraphBase> { - graph: &'a G, - mate: &'a [Option<G::NodeId>], - current: usize, -} - -impl<G> Iterator for MatchedNodes<'_, G> -where - G: NodeIndexable, -{ - type Item = G::NodeId; - - fn next(&mut self) -> Option<Self::Item> { - while self.current != self.mate.len() { - let current = self.current; - self.current += 1; - - if self.mate[current].is_some() { - return Some(self.graph.from_index(current)); - } - } - - None - } -} - -pub struct MatchedEdges<'a, G: GraphBase> { - graph: &'a G, - mate: &'a [Option<G::NodeId>], - current: usize, -} - -impl<G> Iterator for MatchedEdges<'_, G> -where - G: NodeIndexable, -{ - type Item = (G::NodeId, G::NodeId); - - fn next(&mut self) -> Option<Self::Item> { - while self.current != self.mate.len() { - let current = self.current; - self.current += 1; - - if let Some(mate) = self.mate[current] { - // Check if the mate is a node after the current one. If not, then - // do not report that edge since it has been already reported (the - // graph is considered undirected). - if self.graph.to_index(mate) > current { - let this = self.graph.from_index(current); - return Some((this, mate)); - } - } - } - - None - } -} - -/// \[Generic\] Compute a -/// [*matching*](https://en.wikipedia.org/wiki/Matching_(graph_theory)) using a -/// greedy heuristic. -/// -/// The input graph is treated as if undirected. The underlying heuristic is -/// unspecified, but is guaranteed to be bounded by *O(|V| + |E|)*. No -/// guarantees about the output are given other than that it is a valid -/// matching. -/// -/// If you require a maximum matching, use [`maximum_matching`][1] function -/// instead. -/// -/// [1]: fn.maximum_matching.html -pub fn greedy_matching<G>(graph: G) -> Matching<G> -where - G: Visitable + IntoNodeIdentifiers + NodeIndexable + IntoNeighbors, - G::NodeId: Eq + Hash, - G::EdgeId: Eq + Hash, -{ - let (mates, n_edges) = greedy_matching_inner(&graph); - Matching::new(graph, mates, n_edges) -} - -#[inline] -fn greedy_matching_inner<G>(graph: &G) -> (Vec<Option<G::NodeId>>, usize) -where - G: Visitable + IntoNodeIdentifiers + NodeIndexable + IntoNeighbors, -{ - let mut mate = vec![None; graph.node_bound()]; - let mut n_edges = 0; - let visited = &mut graph.visit_map(); - - for start in graph.node_identifiers() { - let mut last = Some(start); - - // Function non_backtracking_dfs does not expand the node if it has been - // already visited. - non_backtracking_dfs(graph, start, visited, |next| { - // Alternate matched and unmatched edges. - if let Some(pred) = last.take() { - mate[graph.to_index(pred)] = Some(next); - mate[graph.to_index(next)] = Some(pred); - n_edges += 1; - } else { - last = Some(next); - } - }); - } - - (mate, n_edges) -} - -fn non_backtracking_dfs<G, F>(graph: &G, source: G::NodeId, visited: &mut G::Map, mut visitor: F) -where - G: Visitable + IntoNeighbors, - F: FnMut(G::NodeId), -{ - if visited.visit(source) { - for target in graph.neighbors(source) { - if !visited.is_visited(&target) { - visitor(target); - non_backtracking_dfs(graph, target, visited, visitor); - - // Non-backtracking traversal, stop iterating over the - // neighbors. - break; - } - } - } -} - -#[derive(Clone, Copy)] -enum Label<G: GraphBase> { - None, - Start, - // If node v is outer node, then label(v) = w is another outer node on path - // from v to start u. - Vertex(G::NodeId), - // If node v is outer node, then label(v) = (r, s) are two outer vertices - // (connected by an edge) - Edge(G::EdgeId, [G::NodeId; 2]), - // Flag is a special label used in searching for the join vertex of two - // paths. - Flag(G::EdgeId), -} - -impl<G: GraphBase> Label<G> { - fn is_outer(&self) -> bool { - self != &Label::None - && !match self { - Label::Flag(_) => true, - _ => false, - } - } - - fn is_inner(&self) -> bool { - !self.is_outer() - } - - fn to_vertex(&self) -> Option<G::NodeId> { - match *self { - Label::Vertex(v) => Some(v), - _ => None, - } - } - - fn is_flagged(&self, edge: G::EdgeId) -> bool { - match self { - Label::Flag(flag) if flag == &edge => true, - _ => false, - } - } -} - -impl<G: GraphBase> Default for Label<G> { - fn default() -> Self { - Label::None - } -} - -impl<G: GraphBase> PartialEq for Label<G> { - fn eq(&self, other: &Self) -> bool { - match (self, other) { - (Label::None, Label::None) => true, - (Label::Start, Label::Start) => true, - (Label::Vertex(v1), Label::Vertex(v2)) => v1 == v2, - (Label::Edge(e1, _), Label::Edge(e2, _)) => e1 == e2, - (Label::Flag(e1), Label::Flag(e2)) => e1 == e2, - _ => false, - } - } -} - -/// \[Generic\] Compute the [*maximum -/// matching*](https://en.wikipedia.org/wiki/Matching_(graph_theory)) using -/// [Gabow's algorithm][1]. -/// -/// [1]: https://dl.acm.org/doi/10.1145/321941.321942 -/// -/// The input graph is treated as if undirected. The algorithm runs in -/// *O(|V|³)*. An algorithm with a better time complexity might be used in the -/// future. -/// -/// **Panics** if `g.node_bound()` is `std::usize::MAX`. -/// -/// # Examples -/// -/// ``` -/// use petgraph::prelude::*; -/// use petgraph::algo::maximum_matching; -/// -/// // The example graph: -/// // -/// // +-- b ---- d ---- f -/// // / | | -/// // a | | -/// // \ | | -/// // +-- c ---- e -/// // -/// // Maximum matching: { (a, b), (c, e), (d, f) } -/// -/// let mut graph: UnGraph<(), ()> = UnGraph::new_undirected(); -/// let a = graph.add_node(()); -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// let e = graph.add_node(()); -/// let f = graph.add_node(()); -/// graph.extend_with_edges(&[(a, b), (a, c), (b, c), (b, d), (c, e), (d, e), (d, f)]); -/// -/// let matching = maximum_matching(&graph); -/// assert!(matching.contains_edge(a, b)); -/// assert!(matching.contains_edge(c, e)); -/// assert_eq!(matching.mate(d), Some(f)); -/// assert_eq!(matching.mate(f), Some(d)); -/// ``` -pub fn maximum_matching<G>(graph: G) -> Matching<G> -where - G: Visitable + NodeIndexable + IntoNodeIdentifiers + IntoEdges, -{ - // The dummy identifier needs an unused index - assert_ne!( - graph.node_bound(), - std::usize::MAX, - "The input graph capacity should be strictly less than std::usize::MAX." - ); - - // Greedy algorithm should create a fairly good initial matching. The hope - // is that it speeds up the computation by doing les work in the complex - // algorithm. - let (mut mate, mut n_edges) = greedy_matching_inner(&graph); - - // Gabow's algorithm uses a dummy node in the mate array. - mate.push(None); - let len = graph.node_bound() + 1; - debug_assert_eq!(mate.len(), len); - - let mut label: Vec<Label<G>> = vec![Label::None; len]; - let mut first_inner = vec![std::usize::MAX; len]; - let visited = &mut graph.visit_map(); - - for start in 0..graph.node_bound() { - if mate[start].is_some() { - // The vertex is already matched. A start must be a free vertex. - continue; - } - - // Begin search from the node. - label[start] = Label::Start; - first_inner[start] = graph.dummy_idx(); - graph.reset_map(visited); - - // start is never a dummy index - let start = graph.from_index(start); - - // Queue will contain outer vertices that should be processed next. The - // start vertex is considered an outer vertex. - let mut queue = VecDeque::new(); - queue.push_back(start); - // Mark the start vertex so it is not processed repeatedly. - visited.visit(start); - - 'search: while let Some(outer_vertex) = queue.pop_front() { - for edge in graph.edges(outer_vertex) { - if edge.source() == edge.target() { - // Ignore self-loops. - continue; - } - - let other_vertex = edge.target(); - let other_idx = graph.to_index(other_vertex); - - if mate[other_idx].is_none() && other_vertex != start { - // An augmenting path was found. Augment the matching. If - // `other` is actually the start node, then the augmentation - // must not be performed, because the start vertex would be - // incident to two edges, which violates the matching - // property. - mate[other_idx] = Some(outer_vertex); - augment_path(&graph, outer_vertex, other_vertex, &mut mate, &label); - n_edges += 1; - - // The path is augmented, so the start is no longer free - // vertex. We need to begin with a new start. - break 'search; - } else if label[other_idx].is_outer() { - // The `other` is an outer vertex (a label has been set to - // it). An odd cycle (blossom) was found. Assign this edge - // as a label to all inner vertices in paths P(outer) and - // P(other). - find_join( - &graph, - edge, - &mate, - &mut label, - &mut first_inner, - |labeled| { - if visited.visit(labeled) { - queue.push_back(labeled); - } - }, - ); - } else { - let mate_vertex = mate[other_idx]; - let mate_idx = mate_vertex.map_or(graph.dummy_idx(), |id| graph.to_index(id)); - - if label[mate_idx].is_inner() { - // Mate of `other` vertex is inner (no label has been - // set to it so far). But it actually is an outer vertex - // (it is on a path to the start vertex that begins with - // a matched edge, since it is a mate of `other`). - // Assign the label of this mate to the `outer` vertex, - // so the path for it can be reconstructed using `mate` - // and this label. - label[mate_idx] = Label::Vertex(outer_vertex); - first_inner[mate_idx] = other_idx; - } - - // Add the vertex to the queue only if it's not the dummy and this is its first - // discovery. - if let Some(mate_vertex) = mate_vertex { - if visited.visit(mate_vertex) { - queue.push_back(mate_vertex); - } - } - } - } - } - - // Reset the labels. All vertices are inner for the next search. - for lbl in label.iter_mut() { - *lbl = Label::None; - } - } - - // Discard the dummy node. - mate.pop(); - - Matching::new(graph, mate, n_edges) -} - -fn find_join<G, F>( - graph: &G, - edge: G::EdgeRef, - mate: &[Option<G::NodeId>], - label: &mut [Label<G>], - first_inner: &mut [usize], - mut visitor: F, -) where - G: IntoEdges + NodeIndexable + Visitable, - F: FnMut(G::NodeId), -{ - // Simultaneously traverse the inner vertices on paths P(source) and - // P(target) to find a join vertex - an inner vertex that is shared by these - // paths. - let source = graph.to_index(edge.source()); - let target = graph.to_index(edge.target()); - - let mut left = first_inner[source]; - let mut right = first_inner[target]; - - if left == right { - // No vertices can be labeled, since both paths already refer to a - // common vertex - the join. - return; - } - - // Flag the (first) inner vertices. This ensures that they are assigned the - // join as their first inner vertex. - let flag = Label::Flag(edge.id()); - label[left] = flag; - label[right] = flag; - - // Find the join. - let join = loop { - // Swap the sides. Do not swap if the right side is already finished. - if right != graph.dummy_idx() { - std::mem::swap(&mut left, &mut right); - } - - // Set left to the next inner vertex in P(source) or P(target). - // The unwraps are safe because left is not the dummy node. - let left_mate = graph.to_index(mate[left].unwrap()); - let next_inner = label[left_mate].to_vertex().unwrap(); - left = first_inner[graph.to_index(next_inner)]; - - if !label[left].is_flagged(edge.id()) { - // The inner vertex is not flagged yet, so flag it. - label[left] = flag; - } else { - // The inner vertex is already flagged. It means that the other side - // had to visit it already. Therefore it is the join vertex. - break left; - } - }; - - // Label all inner vertices on P(source) and P(target) with the found join. - for endpoint in [source, target].iter().copied() { - let mut inner = first_inner[endpoint]; - while inner != join { - // Notify the caller about labeling a vertex. - if let Some(ix) = graph.try_from_index(inner) { - visitor(ix); - } - - label[inner] = Label::Edge(edge.id(), [edge.source(), edge.target()]); - first_inner[inner] = join; - let inner_mate = graph.to_index(mate[inner].unwrap()); - let next_inner = label[inner_mate].to_vertex().unwrap(); - inner = first_inner[graph.to_index(next_inner)]; - } - } - - for (vertex_idx, vertex_label) in label.iter().enumerate() { - // To all outer vertices that are on paths P(source) and P(target) until - // the join, se the join as their first inner vertex. - if vertex_idx != graph.dummy_idx() - && vertex_label.is_outer() - && label[first_inner[vertex_idx]].is_outer() - { - first_inner[vertex_idx] = join; - } - } -} - -fn augment_path<G>( - graph: &G, - outer: G::NodeId, - other: G::NodeId, - mate: &mut [Option<G::NodeId>], - label: &[Label<G>], -) where - G: NodeIndexable, -{ - let outer_idx = graph.to_index(outer); - - let temp = mate[outer_idx]; - let temp_idx = temp.map_or(graph.dummy_idx(), |id| graph.to_index(id)); - mate[outer_idx] = Some(other); - - if mate[temp_idx] != Some(outer) { - // We are at the end of the path and so the entire path is completely - // rematched/augmented. - } else if let Label::Vertex(vertex) = label[outer_idx] { - // The outer vertex has a vertex label which refers to another outer - // vertex on the path. So we set this another outer node as the mate for - // the previous mate of the outer node. - mate[temp_idx] = Some(vertex); - if let Some(temp) = temp { - augment_path(graph, vertex, temp, mate, label); - } - } else if let Label::Edge(_, [source, target]) = label[outer_idx] { - // The outer vertex has an edge label which refers to an edge in a - // blossom. We need to augment both directions along the blossom. - augment_path(graph, source, target, mate, label); - augment_path(graph, target, source, mate, label); - } else { - panic!("Unexpected label when augmenting path"); - } -} diff --git a/vendor/petgraph/src/algo/min_spanning_tree.rs b/vendor/petgraph/src/algo/min_spanning_tree.rs deleted file mode 100644 index 19cefcf5..00000000 --- a/vendor/petgraph/src/algo/min_spanning_tree.rs +++ /dev/null @@ -1,117 +0,0 @@ -//! Minimum Spanning Tree algorithms. - -use std::collections::{BinaryHeap, HashMap}; - -use crate::prelude::*; - -use crate::data::Element; -use crate::scored::MinScored; -use crate::unionfind::UnionFind; -use crate::visit::{Data, IntoNodeReferences, NodeRef}; -use crate::visit::{IntoEdgeReferences, NodeIndexable}; - -/// \[Generic\] Compute a *minimum spanning tree* of a graph. -/// -/// The input graph is treated as if undirected. -/// -/// Using Kruskal's algorithm with runtime **O(|E| log |E|)**. We actually -/// return a minimum spanning forest, i.e. a minimum spanning tree for each connected -/// component of the graph. -/// -/// The resulting graph has all the vertices of the input graph (with identical node indices), -/// and **|V| - c** edges, where **c** is the number of connected components in `g`. -/// -/// Use `from_elements` to create a graph from the resulting iterator. -pub fn min_spanning_tree<G>(g: G) -> MinSpanningTree<G> -where - G::NodeWeight: Clone, - G::EdgeWeight: Clone + PartialOrd, - G: IntoNodeReferences + IntoEdgeReferences + NodeIndexable, -{ - // Initially each vertex is its own disjoint subgraph, track the connectedness - // of the pre-MST with a union & find datastructure. - let subgraphs = UnionFind::new(g.node_bound()); - - let edges = g.edge_references(); - let mut sort_edges = BinaryHeap::with_capacity(edges.size_hint().0); - for edge in edges { - sort_edges.push(MinScored( - edge.weight().clone(), - (edge.source(), edge.target()), - )); - } - - MinSpanningTree { - graph: g, - node_ids: Some(g.node_references()), - subgraphs, - sort_edges, - node_map: HashMap::new(), - node_count: 0, - } -} - -/// An iterator producing a minimum spanning forest of a graph. -#[derive(Debug, Clone)] -pub struct MinSpanningTree<G> -where - G: Data + IntoNodeReferences, -{ - graph: G, - node_ids: Option<G::NodeReferences>, - subgraphs: UnionFind<usize>, - #[allow(clippy::type_complexity)] - sort_edges: BinaryHeap<MinScored<G::EdgeWeight, (G::NodeId, G::NodeId)>>, - node_map: HashMap<usize, usize>, - node_count: usize, -} - -impl<G> Iterator for MinSpanningTree<G> -where - G: IntoNodeReferences + NodeIndexable, - G::NodeWeight: Clone, - G::EdgeWeight: PartialOrd, -{ - type Item = Element<G::NodeWeight, G::EdgeWeight>; - - fn next(&mut self) -> Option<Self::Item> { - let g = self.graph; - if let Some(ref mut iter) = self.node_ids { - if let Some(node) = iter.next() { - self.node_map.insert(g.to_index(node.id()), self.node_count); - self.node_count += 1; - return Some(Element::Node { - weight: node.weight().clone(), - }); - } - } - self.node_ids = None; - - // Kruskal's algorithm. - // Algorithm is this: - // - // 1. Create a pre-MST with all the vertices and no edges. - // 2. Repeat: - // - // a. Remove the shortest edge from the original graph. - // b. If the edge connects two disjoint trees in the pre-MST, - // add the edge. - while let Some(MinScored(score, (a, b))) = self.sort_edges.pop() { - // check if the edge would connect two disjoint parts - let (a_index, b_index) = (g.to_index(a), g.to_index(b)); - if self.subgraphs.union(a_index, b_index) { - let (&a_order, &b_order) = - match (self.node_map.get(&a_index), self.node_map.get(&b_index)) { - (Some(a_id), Some(b_id)) => (a_id, b_id), - _ => panic!("Edge references unknown node"), - }; - return Some(Element::Edge { - source: a_order, - target: b_order, - weight: score, - }); - } - } - None - } -} diff --git a/vendor/petgraph/src/algo/mod.rs b/vendor/petgraph/src/algo/mod.rs deleted file mode 100644 index 218ca20e..00000000 --- a/vendor/petgraph/src/algo/mod.rs +++ /dev/null @@ -1,867 +0,0 @@ -//! Graph algorithms. -//! -//! It is a goal to gradually migrate the algorithms to be based on graph traits -//! so that they are generally applicable. For now, some of these still require -//! the `Graph` type. - -pub mod astar; -pub mod bellman_ford; -pub mod coloring; -pub mod dijkstra; -pub mod dominators; -pub mod feedback_arc_set; -pub mod floyd_warshall; -pub mod ford_fulkerson; -pub mod isomorphism; -pub mod k_shortest_path; -pub mod matching; -pub mod min_spanning_tree; -pub mod page_rank; -pub mod simple_paths; -pub mod tred; - -use std::num::NonZeroUsize; - -use crate::prelude::*; - -use super::graph::IndexType; -use super::unionfind::UnionFind; -use super::visit::{ - GraphBase, GraphRef, IntoEdgeReferences, IntoNeighbors, IntoNeighborsDirected, - IntoNodeIdentifiers, NodeCompactIndexable, NodeIndexable, Reversed, VisitMap, Visitable, -}; -use super::EdgeType; -use crate::visit::Walker; - -pub use astar::astar; -pub use bellman_ford::{bellman_ford, find_negative_cycle}; -pub use coloring::dsatur_coloring; -pub use dijkstra::dijkstra; -pub use feedback_arc_set::greedy_feedback_arc_set; -pub use floyd_warshall::floyd_warshall; -pub use ford_fulkerson::ford_fulkerson; -pub use isomorphism::{ - is_isomorphic, is_isomorphic_matching, is_isomorphic_subgraph, is_isomorphic_subgraph_matching, - subgraph_isomorphisms_iter, -}; -pub use k_shortest_path::k_shortest_path; -pub use matching::{greedy_matching, maximum_matching, Matching}; -pub use min_spanning_tree::min_spanning_tree; -pub use page_rank::page_rank; -pub use simple_paths::all_simple_paths; - -/// \[Generic\] Return the number of connected components of the graph. -/// -/// For a directed graph, this is the *weakly* connected components. -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::connected_components; -/// use petgraph::prelude::*; -/// -/// let mut graph : Graph<(),(),Directed>= Graph::new(); -/// let a = graph.add_node(()); // node with no weight -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// let e = graph.add_node(()); -/// let f = graph.add_node(()); -/// let g = graph.add_node(()); -/// let h = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (b, c), -/// (c, d), -/// (d, a), -/// (e, f), -/// (f, g), -/// (g, h), -/// (h, e) -/// ]); -/// // a ----> b e ----> f -/// // ^ | ^ | -/// // | v | v -/// // d <---- c h <---- g -/// -/// assert_eq!(connected_components(&graph),2); -/// graph.add_edge(b,e,()); -/// assert_eq!(connected_components(&graph),1); -/// ``` -pub fn connected_components<G>(g: G) -> usize -where - G: NodeCompactIndexable + IntoEdgeReferences, -{ - let mut vertex_sets = UnionFind::new(g.node_bound()); - for edge in g.edge_references() { - let (a, b) = (edge.source(), edge.target()); - - // union the two vertices of the edge - vertex_sets.union(g.to_index(a), g.to_index(b)); - } - let mut labels = vertex_sets.into_labeling(); - labels.sort_unstable(); - labels.dedup(); - labels.len() -} - -/// \[Generic\] Return `true` if the input graph contains a cycle. -/// -/// Always treats the input graph as if undirected. -pub fn is_cyclic_undirected<G>(g: G) -> bool -where - G: NodeIndexable + IntoEdgeReferences, -{ - let mut edge_sets = UnionFind::new(g.node_bound()); - for edge in g.edge_references() { - let (a, b) = (edge.source(), edge.target()); - - // union the two vertices of the edge - // -- if they were already the same, then we have a cycle - if !edge_sets.union(g.to_index(a), g.to_index(b)) { - return true; - } - } - false -} - -/// \[Generic\] Perform a topological sort of a directed graph. -/// -/// If the graph was acyclic, return a vector of nodes in topological order: -/// each node is ordered before its successors. -/// Otherwise, it will return a `Cycle` error. Self loops are also cycles. -/// -/// To handle graphs with cycles, use the scc algorithms or `DfsPostOrder` -/// instead of this function. -/// -/// If `space` is not `None`, it is used instead of creating a new workspace for -/// graph traversal. The implementation is iterative. -pub fn toposort<G>( - g: G, - space: Option<&mut DfsSpace<G::NodeId, G::Map>>, -) -> Result<Vec<G::NodeId>, Cycle<G::NodeId>> -where - G: IntoNeighborsDirected + IntoNodeIdentifiers + Visitable, -{ - // based on kosaraju scc - with_dfs(g, space, |dfs| { - dfs.reset(g); - let mut finished = g.visit_map(); - - let mut finish_stack = Vec::new(); - for i in g.node_identifiers() { - if dfs.discovered.is_visited(&i) { - continue; - } - dfs.stack.push(i); - while let Some(&nx) = dfs.stack.last() { - if dfs.discovered.visit(nx) { - // First time visiting `nx`: Push neighbors, don't pop `nx` - for succ in g.neighbors(nx) { - if succ == nx { - // self cycle - return Err(Cycle(nx)); - } - if !dfs.discovered.is_visited(&succ) { - dfs.stack.push(succ); - } - } - } else { - dfs.stack.pop(); - if finished.visit(nx) { - // Second time: All reachable nodes must have been finished - finish_stack.push(nx); - } - } - } - } - finish_stack.reverse(); - - dfs.reset(g); - for &i in &finish_stack { - dfs.move_to(i); - let mut cycle = false; - while let Some(j) = dfs.next(Reversed(g)) { - if cycle { - return Err(Cycle(j)); - } - cycle = true; - } - } - - Ok(finish_stack) - }) -} - -/// \[Generic\] Return `true` if the input directed graph contains a cycle. -/// -/// This implementation is recursive; use `toposort` if an alternative is -/// needed. -pub fn is_cyclic_directed<G>(g: G) -> bool -where - G: IntoNodeIdentifiers + IntoNeighbors + Visitable, -{ - use crate::visit::{depth_first_search, DfsEvent}; - - depth_first_search(g, g.node_identifiers(), |event| match event { - DfsEvent::BackEdge(_, _) => Err(()), - _ => Ok(()), - }) - .is_err() -} - -type DfsSpaceType<G> = DfsSpace<<G as GraphBase>::NodeId, <G as Visitable>::Map>; - -/// Workspace for a graph traversal. -#[derive(Clone, Debug)] -pub struct DfsSpace<N, VM> { - dfs: Dfs<N, VM>, -} - -impl<N, VM> DfsSpace<N, VM> -where - N: Copy + PartialEq, - VM: VisitMap<N>, -{ - pub fn new<G>(g: G) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - DfsSpace { dfs: Dfs::empty(g) } - } -} - -impl<N, VM> Default for DfsSpace<N, VM> -where - VM: VisitMap<N> + Default, -{ - fn default() -> Self { - DfsSpace { - dfs: Dfs { - stack: <_>::default(), - discovered: <_>::default(), - }, - } - } -} - -/// Create a Dfs if it's needed -fn with_dfs<G, F, R>(g: G, space: Option<&mut DfsSpaceType<G>>, f: F) -> R -where - G: GraphRef + Visitable, - F: FnOnce(&mut Dfs<G::NodeId, G::Map>) -> R, -{ - let mut local_visitor; - let dfs = if let Some(v) = space { - &mut v.dfs - } else { - local_visitor = Dfs::empty(g); - &mut local_visitor - }; - f(dfs) -} - -/// \[Generic\] Check if there exists a path starting at `from` and reaching `to`. -/// -/// If `from` and `to` are equal, this function returns true. -/// -/// If `space` is not `None`, it is used instead of creating a new workspace for -/// graph traversal. -pub fn has_path_connecting<G>( - g: G, - from: G::NodeId, - to: G::NodeId, - space: Option<&mut DfsSpace<G::NodeId, G::Map>>, -) -> bool -where - G: IntoNeighbors + Visitable, -{ - with_dfs(g, space, |dfs| { - dfs.reset(g); - dfs.move_to(from); - dfs.iter(g).any(|x| x == to) - }) -} - -/// Renamed to `kosaraju_scc`. -#[deprecated(note = "renamed to kosaraju_scc")] -pub fn scc<G>(g: G) -> Vec<Vec<G::NodeId>> -where - G: IntoNeighborsDirected + Visitable + IntoNodeIdentifiers, -{ - kosaraju_scc(g) -} - -/// \[Generic\] Compute the *strongly connected components* using [Kosaraju's algorithm][1]. -/// -/// [1]: https://en.wikipedia.org/wiki/Kosaraju%27s_algorithm -/// -/// Return a vector where each element is a strongly connected component (scc). -/// The order of node ids within each scc is arbitrary, but the order of -/// the sccs is their postorder (reverse topological sort). -/// -/// For an undirected graph, the sccs are simply the connected components. -/// -/// This implementation is iterative and does two passes over the nodes. -pub fn kosaraju_scc<G>(g: G) -> Vec<Vec<G::NodeId>> -where - G: IntoNeighborsDirected + Visitable + IntoNodeIdentifiers, -{ - let mut dfs = DfsPostOrder::empty(g); - - // First phase, reverse dfs pass, compute finishing times. - // http://stackoverflow.com/a/26780899/161659 - let mut finish_order = Vec::with_capacity(0); - for i in g.node_identifiers() { - if dfs.discovered.is_visited(&i) { - continue; - } - - dfs.move_to(i); - while let Some(nx) = dfs.next(Reversed(g)) { - finish_order.push(nx); - } - } - - let mut dfs = Dfs::from_parts(dfs.stack, dfs.discovered); - dfs.reset(g); - let mut sccs = Vec::new(); - - // Second phase - // Process in decreasing finishing time order - for i in finish_order.into_iter().rev() { - if dfs.discovered.is_visited(&i) { - continue; - } - // Move to the leader node `i`. - dfs.move_to(i); - let mut scc = Vec::new(); - while let Some(nx) = dfs.next(g) { - scc.push(nx); - } - sccs.push(scc); - } - sccs -} - -#[derive(Copy, Clone, Debug)] -struct NodeData { - rootindex: Option<NonZeroUsize>, -} - -/// A reusable state for computing the *strongly connected components* using [Tarjan's algorithm][1]. -/// -/// [1]: https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm -#[derive(Debug)] -pub struct TarjanScc<N> { - index: usize, - componentcount: usize, - nodes: Vec<NodeData>, - stack: Vec<N>, -} - -impl<N> Default for TarjanScc<N> { - fn default() -> Self { - Self::new() - } -} - -impl<N> TarjanScc<N> { - /// Creates a new `TarjanScc` - pub fn new() -> Self { - TarjanScc { - index: 1, // Invariant: index < componentcount at all times. - componentcount: std::usize::MAX, // Will hold if componentcount is initialized to number of nodes - 1 or higher. - nodes: Vec::new(), - stack: Vec::new(), - } - } - - /// \[Generic\] Compute the *strongly connected components* using Algorithm 3 in - /// [A Space-Efficient Algorithm for Finding Strongly Connected Components][1] by David J. Pierce, - /// which is a memory-efficient variation of [Tarjan's algorithm][2]. - /// - /// - /// [1]: https://homepages.ecs.vuw.ac.nz/~djp/files/P05.pdf - /// [2]: https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm - /// - /// Calls `f` for each strongly strongly connected component (scc). - /// The order of node ids within each scc is arbitrary, but the order of - /// the sccs is their postorder (reverse topological sort). - /// - /// For an undirected graph, the sccs are simply the connected components. - /// - /// This implementation is recursive and does one pass over the nodes. - pub fn run<G, F>(&mut self, g: G, mut f: F) - where - G: IntoNodeIdentifiers<NodeId = N> + IntoNeighbors<NodeId = N> + NodeIndexable<NodeId = N>, - F: FnMut(&[N]), - N: Copy + PartialEq, - { - self.nodes.clear(); - self.nodes - .resize(g.node_bound(), NodeData { rootindex: None }); - - for n in g.node_identifiers() { - let visited = self.nodes[g.to_index(n)].rootindex.is_some(); - if !visited { - self.visit(n, g, &mut f); - } - } - - debug_assert!(self.stack.is_empty()); - } - - fn visit<G, F>(&mut self, v: G::NodeId, g: G, f: &mut F) - where - G: IntoNeighbors<NodeId = N> + NodeIndexable<NodeId = N>, - F: FnMut(&[N]), - N: Copy + PartialEq, - { - macro_rules! node { - ($node:expr) => { - self.nodes[g.to_index($node)] - }; - } - - let node_v = &mut node![v]; - debug_assert!(node_v.rootindex.is_none()); - - let mut v_is_local_root = true; - let v_index = self.index; - node_v.rootindex = NonZeroUsize::new(v_index); - self.index += 1; - - for w in g.neighbors(v) { - if node![w].rootindex.is_none() { - self.visit(w, g, f); - } - if node![w].rootindex < node![v].rootindex { - node![v].rootindex = node![w].rootindex; - v_is_local_root = false - } - } - - if v_is_local_root { - // Pop the stack and generate an SCC. - let mut indexadjustment = 1; - let c = NonZeroUsize::new(self.componentcount); - let nodes = &mut self.nodes; - let start = self - .stack - .iter() - .rposition(|&w| { - if nodes[g.to_index(v)].rootindex > nodes[g.to_index(w)].rootindex { - true - } else { - nodes[g.to_index(w)].rootindex = c; - indexadjustment += 1; - false - } - }) - .map(|x| x + 1) - .unwrap_or_default(); - nodes[g.to_index(v)].rootindex = c; - self.stack.push(v); // Pushing the component root to the back right before getting rid of it is somewhat ugly, but it lets it be included in f. - f(&self.stack[start..]); - self.stack.truncate(start); - self.index -= indexadjustment; // Backtrack index back to where it was before we ever encountered the component. - self.componentcount -= 1; - } else { - self.stack.push(v); // Stack is filled up when backtracking, unlike in Tarjans original algorithm. - } - } - - /// Returns the index of the component in which v has been assigned. Allows for using self as a lookup table for an scc decomposition produced by self.run(). - pub fn node_component_index<G>(&self, g: G, v: N) -> usize - where - G: IntoNeighbors<NodeId = N> + NodeIndexable<NodeId = N>, - N: Copy + PartialEq, - { - let rindex: usize = self.nodes[g.to_index(v)] - .rootindex - .map(NonZeroUsize::get) - .unwrap_or(0); // Compiles to no-op. - debug_assert!( - rindex != 0, - "Tried to get the component index of an unvisited node." - ); - debug_assert!( - rindex > self.componentcount, - "Given node has been visited but not yet assigned to a component." - ); - std::usize::MAX - rindex - } -} - -/// \[Generic\] Compute the *strongly connected components* using [Tarjan's algorithm][1]. -/// -/// [1]: https://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm -/// [2]: https://homepages.ecs.vuw.ac.nz/~djp/files/P05.pdf -/// -/// Return a vector where each element is a strongly connected component (scc). -/// The order of node ids within each scc is arbitrary, but the order of -/// the sccs is their postorder (reverse topological sort). -/// -/// For an undirected graph, the sccs are simply the connected components. -/// -/// This implementation is recursive and does one pass over the nodes. It is based on -/// [A Space-Efficient Algorithm for Finding Strongly Connected Components][2] by David J. Pierce, -/// to provide a memory-efficient implementation of [Tarjan's algorithm][1]. -pub fn tarjan_scc<G>(g: G) -> Vec<Vec<G::NodeId>> -where - G: IntoNodeIdentifiers + IntoNeighbors + NodeIndexable, -{ - let mut sccs = Vec::new(); - { - let mut tarjan_scc = TarjanScc::new(); - tarjan_scc.run(g, |scc| sccs.push(scc.to_vec())); - } - sccs -} - -/// [Graph] Condense every strongly connected component into a single node and return the result. -/// -/// If `make_acyclic` is true, self-loops and multi edges are ignored, guaranteeing that -/// the output is acyclic. -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::condensation; -/// use petgraph::prelude::*; -/// -/// let mut graph : Graph<(),(),Directed> = Graph::new(); -/// let a = graph.add_node(()); // node with no weight -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// let e = graph.add_node(()); -/// let f = graph.add_node(()); -/// let g = graph.add_node(()); -/// let h = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (b, c), -/// (c, d), -/// (d, a), -/// (b, e), -/// (e, f), -/// (f, g), -/// (g, h), -/// (h, e) -/// ]); -/// -/// // a ----> b ----> e ----> f -/// // ^ | ^ | -/// // | v | v -/// // d <---- c h <---- g -/// -/// let condensed_graph = condensation(graph,false); -/// let A = NodeIndex::new(0); -/// let B = NodeIndex::new(1); -/// assert_eq!(condensed_graph.node_count(), 2); -/// assert_eq!(condensed_graph.edge_count(), 9); -/// assert_eq!(condensed_graph.neighbors(A).collect::<Vec<_>>(), vec![A, A, A, A]); -/// assert_eq!(condensed_graph.neighbors(B).collect::<Vec<_>>(), vec![A, B, B, B, B]); -/// ``` -/// If `make_acyclic` is true, self-loops and multi edges are ignored: -/// -/// ```rust -/// # use petgraph::Graph; -/// # use petgraph::algo::condensation; -/// # use petgraph::prelude::*; -/// # -/// # let mut graph : Graph<(),(),Directed> = Graph::new(); -/// # let a = graph.add_node(()); // node with no weight -/// # let b = graph.add_node(()); -/// # let c = graph.add_node(()); -/// # let d = graph.add_node(()); -/// # let e = graph.add_node(()); -/// # let f = graph.add_node(()); -/// # let g = graph.add_node(()); -/// # let h = graph.add_node(()); -/// # -/// # graph.extend_with_edges(&[ -/// # (a, b), -/// # (b, c), -/// # (c, d), -/// # (d, a), -/// # (b, e), -/// # (e, f), -/// # (f, g), -/// # (g, h), -/// # (h, e) -/// # ]); -/// let acyclic_condensed_graph = condensation(graph, true); -/// let A = NodeIndex::new(0); -/// let B = NodeIndex::new(1); -/// assert_eq!(acyclic_condensed_graph.node_count(), 2); -/// assert_eq!(acyclic_condensed_graph.edge_count(), 1); -/// assert_eq!(acyclic_condensed_graph.neighbors(B).collect::<Vec<_>>(), vec![A]); -/// ``` -pub fn condensation<N, E, Ty, Ix>( - g: Graph<N, E, Ty, Ix>, - make_acyclic: bool, -) -> Graph<Vec<N>, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - let sccs = kosaraju_scc(&g); - let mut condensed: Graph<Vec<N>, E, Ty, Ix> = Graph::with_capacity(sccs.len(), g.edge_count()); - - // Build a map from old indices to new ones. - let mut node_map = vec![NodeIndex::end(); g.node_count()]; - for comp in sccs { - let new_nix = condensed.add_node(Vec::new()); - for nix in comp { - node_map[nix.index()] = new_nix; - } - } - - // Consume nodes and edges of the old graph and insert them into the new one. - let (nodes, edges) = g.into_nodes_edges(); - for (nix, node) in nodes.into_iter().enumerate() { - condensed[node_map[nix]].push(node.weight); - } - for edge in edges { - let source = node_map[edge.source().index()]; - let target = node_map[edge.target().index()]; - if make_acyclic { - if source != target { - condensed.update_edge(source, target, edge.weight); - } - } else { - condensed.add_edge(source, target, edge.weight); - } - } - condensed -} - -/// An algorithm error: a cycle was found in the graph. -#[derive(Clone, Debug, PartialEq)] -pub struct Cycle<N>(pub(crate) N); - -impl<N> Cycle<N> { - /// Return a node id that participates in the cycle - pub fn node_id(&self) -> N - where - N: Copy, - { - self.0 - } -} - -/// An algorithm error: a cycle of negative weights was found in the graph. -#[derive(Clone, Debug, PartialEq)] -pub struct NegativeCycle(pub ()); - -/// Return `true` if the graph is bipartite. A graph is bipartite if its nodes can be divided into -/// two disjoint and indepedent sets U and V such that every edge connects U to one in V. This -/// algorithm implements 2-coloring algorithm based on the BFS algorithm. -/// -/// Always treats the input graph as if undirected. -pub fn is_bipartite_undirected<G, N, VM>(g: G, start: N) -> bool -where - G: GraphRef + Visitable<NodeId = N, Map = VM> + IntoNeighbors<NodeId = N>, - N: Copy + PartialEq + std::fmt::Debug, - VM: VisitMap<N>, -{ - let mut red = g.visit_map(); - red.visit(start); - let mut blue = g.visit_map(); - - let mut stack = ::std::collections::VecDeque::new(); - stack.push_front(start); - - while let Some(node) = stack.pop_front() { - let is_red = red.is_visited(&node); - let is_blue = blue.is_visited(&node); - - assert!(is_red ^ is_blue); - - for neighbour in g.neighbors(node) { - let is_neigbour_red = red.is_visited(&neighbour); - let is_neigbour_blue = blue.is_visited(&neighbour); - - if (is_red && is_neigbour_red) || (is_blue && is_neigbour_blue) { - return false; - } - - if !is_neigbour_red && !is_neigbour_blue { - //hasn't been visited yet - - match (is_red, is_blue) { - (true, false) => { - blue.visit(neighbour); - } - (false, true) => { - red.visit(neighbour); - } - (_, _) => { - panic!("Invariant doesn't hold"); - } - } - - stack.push_back(neighbour); - } - } - } - - true -} - -use std::fmt::Debug; -use std::ops::Add; - -/// Associated data that can be used for measures (such as length). -pub trait Measure: Debug + PartialOrd + Add<Self, Output = Self> + Default + Clone {} - -impl<M> Measure for M where M: Debug + PartialOrd + Add<M, Output = M> + Default + Clone {} - -/// A floating-point measure. -pub trait FloatMeasure: Measure + Copy { - fn zero() -> Self; - fn infinite() -> Self; -} - -impl FloatMeasure for f32 { - fn zero() -> Self { - 0. - } - fn infinite() -> Self { - 1. / 0. - } -} - -impl FloatMeasure for f64 { - fn zero() -> Self { - 0. - } - fn infinite() -> Self { - 1. / 0. - } -} - -pub trait BoundedMeasure: Measure + std::ops::Sub<Self, Output = Self> { - fn min() -> Self; - fn max() -> Self; - fn overflowing_add(self, rhs: Self) -> (Self, bool); -} - -macro_rules! impl_bounded_measure_integer( - ( $( $t:ident ),* ) => { - $( - impl BoundedMeasure for $t { - fn min() -> Self { - std::$t::MIN - } - - fn max() -> Self { - std::$t::MAX - } - - fn overflowing_add(self, rhs: Self) -> (Self, bool) { - self.overflowing_add(rhs) - } - } - )* - }; -); - -impl_bounded_measure_integer!(u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize); - -macro_rules! impl_bounded_measure_float( - ( $( $t:ident ),* ) => { - $( - impl BoundedMeasure for $t { - fn min() -> Self { - std::$t::MIN - } - - fn max() -> Self { - std::$t::MAX - } - - fn overflowing_add(self, rhs: Self) -> (Self, bool) { - // for an overflow: a + b > max: both values need to be positive and a > max - b must be satisfied - let overflow = self > Self::default() && rhs > Self::default() && self > std::$t::MAX - rhs; - - // for an underflow: a + b < min: overflow can not happen and both values must be negative and a < min - b must be satisfied - let underflow = !overflow && self < Self::default() && rhs < Self::default() && self < std::$t::MIN - rhs; - - (self + rhs, overflow || underflow) - } - } - )* - }; -); - -impl_bounded_measure_float!(f32, f64); - -/// A floating-point measure that can be computed from `usize` -/// and with a default measure of proximity. -pub trait UnitMeasure: - Measure - + std::ops::Sub<Self, Output = Self> - + std::ops::Mul<Self, Output = Self> - + std::ops::Div<Self, Output = Self> - + std::iter::Sum -{ - fn zero() -> Self; - fn one() -> Self; - fn from_usize(nb: usize) -> Self; - fn default_tol() -> Self; -} - -macro_rules! impl_unit_measure( - ( $( $t:ident ),* )=> { - $( - impl UnitMeasure for $t { - fn zero() -> Self { - 0 as $t - } - fn one() -> Self { - 1 as $t - } - - fn from_usize(nb: usize) -> Self { - nb as $t - } - - fn default_tol() -> Self { - 1e-6 as $t - } - - } - - )* - } -); -impl_unit_measure!(f32, f64); - -/// Some measure of positive numbers, assuming positive -/// float-pointing numbers -pub trait PositiveMeasure: Measure + Copy { - fn zero() -> Self; - fn max() -> Self; -} - -macro_rules! impl_positive_measure( - ( $( $t:ident ),* )=> { - $( - impl PositiveMeasure for $t { - fn zero() -> Self { - 0 as $t - } - fn max() -> Self { - std::$t::MAX - } - } - - )* - } -); - -impl_positive_measure!(u8, u16, u32, u64, u128, usize, f32, f64); diff --git a/vendor/petgraph/src/algo/page_rank.rs b/vendor/petgraph/src/algo/page_rank.rs deleted file mode 100644 index e859d905..00000000 --- a/vendor/petgraph/src/algo/page_rank.rs +++ /dev/null @@ -1,185 +0,0 @@ -use crate::visit::{EdgeRef, IntoEdges, NodeCount, NodeIndexable}; - -#[cfg(feature = "rayon")] -use rayon::prelude::*; - -use super::UnitMeasure; -/// \[Generic\] Page Rank algorithm. -/// -/// Computes the ranks of every node in a graph using the [Page Rank algorithm][pr]. -/// -/// Returns a `Vec` container mapping each node index to its rank. -/// -/// # Panics -/// The damping factor should be a number of type `f32` or `f64` between 0 and 1 (0 and 1 included). Otherwise, it panics. -/// -/// # Complexity -/// Time complexity is **O(N|V|²|E|)**. -/// Space complexity is **O(|V| + |E|)** -/// where **N** is the number of iterations, **|V|** the number of vertices (i.e nodes) and **|E|** the number of edges. -/// -/// [pr]: https://en.wikipedia.org/wiki/PageRank -/// -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::algo::page_rank; -/// let mut g: Graph<(), usize> = Graph::new(); -/// assert_eq!(page_rank(&g, 0.5_f64, 1), vec![]); // empty graphs have no node ranks. -/// let a = g.add_node(()); -/// let b = g.add_node(()); -/// let c = g.add_node(()); -/// let d = g.add_node(()); -/// let e = g.add_node(()); -/// g.extend_with_edges(&[(0, 1), (0, 3), (1, 2), (1, 3)]); -/// // With the following dot representation. -/// //digraph { -/// // 0 [ label = "()" ] -/// // 1 [ label = "()" ] -/// // 2 [ label = "()" ] -/// // 3 [ label = "()" ] -/// // 4 [ label = "()" ] -/// // 0 -> 1 [ label = "0.0" ] -/// // 0 -> 3 [ label = "0.0" ] -/// // 1 -> 2 [ label = "0.0" ] -/// // 1 -> 3 [ label = "0.0" ] -/// //} -/// let damping_factor = 0.7_f32; -/// let number_iterations = 10; -/// let output_ranks = page_rank(&g, damping_factor, number_iterations); -/// let expected_ranks = vec![0.14685437, 0.20267677, 0.22389607, 0.27971846, 0.14685437]; -/// assert_eq!(expected_ranks, output_ranks); -/// ``` -pub fn page_rank<G, D>(graph: G, damping_factor: D, nb_iter: usize) -> Vec<D> -where - G: NodeCount + IntoEdges + NodeIndexable, - D: UnitMeasure + Copy, -{ - let node_count = graph.node_count(); - if node_count == 0 { - return vec![]; - } - assert!( - D::zero() <= damping_factor && damping_factor <= D::one(), - "Damping factor should be between 0 et 1." - ); - let nb = D::from_usize(node_count); - let mut ranks = vec![D::one() / nb; node_count]; - let nodeix = |i| graph.from_index(i); - let out_degrees: Vec<D> = (0..node_count) - .map(|i| graph.edges(nodeix(i)).map(|_| D::one()).sum::<D>()) - .collect(); - - for _ in 0..nb_iter { - let pi = (0..node_count) - .enumerate() - .map(|(v, _)| { - ranks - .iter() - .enumerate() - .map(|(w, r)| { - let mut w_out_edges = graph.edges(nodeix(w)); - if w_out_edges.any(|e| e.target() == nodeix(v)) { - damping_factor * *r / out_degrees[w] - } else if out_degrees[w] == D::zero() { - damping_factor * *r / nb // stochastic matrix condition - } else { - (D::one() - damping_factor) * *r / nb // random jumps - } - }) - .sum::<D>() - }) - .collect::<Vec<D>>(); - let sum = pi.iter().copied().sum::<D>(); - ranks = pi.iter().map(|r| *r / sum).collect::<Vec<D>>(); - } - ranks -} - -#[allow(dead_code)] -fn out_edges_info<G, D>(graph: G, index_w: usize, index_v: usize) -> (D, bool) -where - G: NodeCount + IntoEdges + NodeIndexable + std::marker::Sync, - D: UnitMeasure + Copy + std::marker::Send + std::marker::Sync, -{ - let node_w = graph.from_index(index_w); - let node_v = graph.from_index(index_v); - let mut out_edges = graph.edges(node_w); - let mut out_edge = out_edges.next(); - let mut out_degree = D::zero(); - let mut flag_points_to = false; - while let Some(edge) = out_edge { - out_degree = out_degree + D::one(); - if edge.target() == node_v { - flag_points_to = true; - } - out_edge = out_edges.next(); - } - (out_degree, flag_points_to) -} -/// \[Generic\] Parallel Page Rank algorithm. -/// -/// See [`page_rank`]. -#[cfg(feature = "rayon")] -pub fn parallel_page_rank<G, D>( - graph: G, - damping_factor: D, - nb_iter: usize, - tol: Option<D>, -) -> Vec<D> -where - G: NodeCount + IntoEdges + NodeIndexable + std::marker::Sync, - D: UnitMeasure + Copy + std::marker::Send + std::marker::Sync, -{ - let node_count = graph.node_count(); - if node_count == 0 { - return vec![]; - } - assert!( - D::zero() <= damping_factor && damping_factor <= D::one(), - "Damping factor should be between 0 et 1." - ); - let mut tolerance = D::default_tol(); - if let Some(_tol) = tol { - tolerance = _tol; - } - let nb = D::from_usize(node_count); - let mut ranks: Vec<D> = (0..node_count) - .into_par_iter() - .map(|_| D::one() / nb) - .collect(); - for _ in 0..nb_iter { - let pi = (0..node_count) - .into_par_iter() - .map(|v| { - ranks - .iter() - .enumerate() - .map(|(w, r)| { - let (out_deg, w_points_to_v) = out_edges_info(graph, w, v); - if w_points_to_v { - damping_factor * *r / out_deg - } else if out_deg == D::zero() { - damping_factor * *r / nb // stochastic matrix condition - } else { - (D::one() - damping_factor) * *r / nb // random jumps - } - }) - .sum::<D>() - }) - .collect::<Vec<D>>(); - let sum = pi.par_iter().map(|score| *score).sum::<D>(); - let new_ranks = pi.par_iter().map(|r| *r / sum).collect::<Vec<D>>(); - let squared_norm_2 = new_ranks - .par_iter() - .zip(&ranks) - .map(|(new, old)| (*new - *old) * (*new - *old)) - .sum::<D>(); - if squared_norm_2 <= tolerance { - return ranks; - } else { - ranks = new_ranks; - } - } - ranks -} diff --git a/vendor/petgraph/src/algo/simple_paths.rs b/vendor/petgraph/src/algo/simple_paths.rs deleted file mode 100644 index 4169b95f..00000000 --- a/vendor/petgraph/src/algo/simple_paths.rs +++ /dev/null @@ -1,199 +0,0 @@ -use std::{ - hash::Hash, - iter::{from_fn, FromIterator}, -}; - -use indexmap::IndexSet; - -use crate::{ - visit::{IntoNeighborsDirected, NodeCount}, - Direction::Outgoing, -}; - -/// Returns an iterator that produces all simple paths from `from` node to `to`, which contains at least `min_intermediate_nodes` nodes -/// and at most `max_intermediate_nodes`, if given, or limited by the graph's order otherwise. The simple path is a path without repetitions. -/// -/// This algorithm is adapted from <https://networkx.github.io/documentation/stable/reference/algorithms/generated/networkx.algorithms.simple_paths.all_simple_paths.html>. -/// -/// # Example -/// ``` -/// use petgraph::{algo, prelude::*}; -/// -/// let mut graph = DiGraph::<&str, i32>::new(); -/// -/// let a = graph.add_node("a"); -/// let b = graph.add_node("b"); -/// let c = graph.add_node("c"); -/// let d = graph.add_node("d"); -/// -/// graph.extend_with_edges(&[(a, b, 1), (b, c, 1), (c, d, 1), (a, b, 1), (b, d, 1)]); -/// -/// let paths = algo::all_simple_paths::<Vec<_>, _>(&graph, a, d, 0, None) -/// .collect::<Vec<_>>(); -/// -/// assert_eq!(paths.len(), 4); -/// -/// -/// // Take only 2 paths. -/// let paths = algo::all_simple_paths::<Vec<_>, _>(&graph, a, d, 0, None) -/// .take(2) -/// .collect::<Vec<_>>(); -/// -/// assert_eq!(paths.len(), 2); -/// -/// ``` -/// -/// # Note -/// -/// The number of simple paths between a given pair of vertices almost always grows exponentially, -/// reaching `O(V!)` on a dense graphs at `V` vertices. -/// -/// So if you have a large enough graph, be prepared to wait for the results for years. -/// Or consider extracting only part of the simple paths using the adapter [`Iterator::take`]. -pub fn all_simple_paths<TargetColl, G>( - graph: G, - from: G::NodeId, - to: G::NodeId, - min_intermediate_nodes: usize, - max_intermediate_nodes: Option<usize>, -) -> impl Iterator<Item = TargetColl> -where - G: NodeCount, - G: IntoNeighborsDirected, - G::NodeId: Eq + Hash, - TargetColl: FromIterator<G::NodeId>, -{ - // how many nodes are allowed in simple path up to target node - // it is min/max allowed path length minus one, because it is more appropriate when implementing lookahead - // than constantly add 1 to length of current path - let max_length = if let Some(l) = max_intermediate_nodes { - l + 1 - } else { - graph.node_count() - 1 - }; - - let min_length = min_intermediate_nodes + 1; - - // list of visited nodes - let mut visited: IndexSet<G::NodeId> = IndexSet::from_iter(Some(from)); - // list of childs of currently exploring path nodes, - // last elem is list of childs of last visited node - let mut stack = vec![graph.neighbors_directed(from, Outgoing)]; - - from_fn(move || { - while let Some(children) = stack.last_mut() { - if let Some(child) = children.next() { - if visited.len() < max_length { - if child == to { - if visited.len() >= min_length { - let path = visited - .iter() - .cloned() - .chain(Some(to)) - .collect::<TargetColl>(); - return Some(path); - } - } else if !visited.contains(&child) { - visited.insert(child); - stack.push(graph.neighbors_directed(child, Outgoing)); - } - } else { - if (child == to || children.any(|v| v == to)) && visited.len() >= min_length { - let path = visited - .iter() - .cloned() - .chain(Some(to)) - .collect::<TargetColl>(); - return Some(path); - } - stack.pop(); - visited.pop(); - } - } else { - stack.pop(); - visited.pop(); - } - } - None - }) -} - -#[cfg(test)] -mod test { - use std::{collections::HashSet, iter::FromIterator}; - - use itertools::assert_equal; - - use crate::{dot::Dot, prelude::DiGraph}; - - use super::all_simple_paths; - - #[test] - fn test_all_simple_paths() { - let graph = DiGraph::<i32, i32, _>::from_edges(&[ - (0, 1), - (0, 2), - (0, 3), - (1, 2), - (1, 3), - (2, 3), - (2, 4), - (3, 2), - (3, 4), - (4, 2), - (4, 5), - (5, 2), - (5, 3), - ]); - - let expexted_simple_paths_0_to_5 = vec![ - vec![0usize, 1, 2, 3, 4, 5], - vec![0, 1, 2, 4, 5], - vec![0, 1, 3, 2, 4, 5], - vec![0, 1, 3, 4, 5], - vec![0, 2, 3, 4, 5], - vec![0, 2, 4, 5], - vec![0, 3, 2, 4, 5], - vec![0, 3, 4, 5], - ]; - - println!("{}", Dot::new(&graph)); - let actual_simple_paths_0_to_5: HashSet<Vec<_>> = - all_simple_paths(&graph, 0u32.into(), 5u32.into(), 0, None) - .map(|v: Vec<_>| v.into_iter().map(|i| i.index()).collect()) - .collect(); - assert_eq!(actual_simple_paths_0_to_5.len(), 8); - assert_eq!( - HashSet::from_iter(expexted_simple_paths_0_to_5), - actual_simple_paths_0_to_5 - ); - } - - #[test] - fn test_one_simple_path() { - let graph = DiGraph::<i32, i32, _>::from_edges(&[(0, 1), (2, 1)]); - - let expexted_simple_paths_0_to_1 = &[vec![0usize, 1]]; - println!("{}", Dot::new(&graph)); - let actual_simple_paths_0_to_1: Vec<Vec<_>> = - all_simple_paths(&graph, 0u32.into(), 1u32.into(), 0, None) - .map(|v: Vec<_>| v.into_iter().map(|i| i.index()).collect()) - .collect(); - - assert_eq!(actual_simple_paths_0_to_1.len(), 1); - assert_equal(expexted_simple_paths_0_to_1, &actual_simple_paths_0_to_1); - } - - #[test] - fn test_no_simple_paths() { - let graph = DiGraph::<i32, i32, _>::from_edges(&[(0, 1), (2, 1)]); - - println!("{}", Dot::new(&graph)); - let actual_simple_paths_0_to_2: Vec<Vec<_>> = - all_simple_paths(&graph, 0u32.into(), 2u32.into(), 0, None) - .map(|v: Vec<_>| v.into_iter().map(|i| i.index()).collect()) - .collect(); - - assert_eq!(actual_simple_paths_0_to_2.len(), 0); - } -} diff --git a/vendor/petgraph/src/algo/tred.rs b/vendor/petgraph/src/algo/tred.rs deleted file mode 100644 index 9fe080e1..00000000 --- a/vendor/petgraph/src/algo/tred.rs +++ /dev/null @@ -1,162 +0,0 @@ -//! Compute the transitive reduction and closure of a directed acyclic graph -//! -//! ## Transitive reduction and closure -//! The *transitive closure* of a graph **G = (V, E)** is the graph **Gc = (V, Ec)** -//! such that **(i, j)** belongs to **Ec** if and only if there is a path connecting -//! **i** to **j** in **G**. The *transitive reduction* of **G** is the graph **Gr -//! = (V, Er)** such that **Er** is minimal wrt. inclusion in **E** and the transitive -//! closure of **Gr** is the same as that of **G**. -//! The transitive reduction is well-defined for acyclic graphs only. - -use crate::adj::{List, UnweightedList}; -use crate::graph::IndexType; -use crate::visit::{ - GraphBase, IntoNeighbors, IntoNeighborsDirected, NodeCompactIndexable, NodeCount, -}; -use crate::Direction; -use fixedbitset::FixedBitSet; - -/// Creates a representation of the same graph respecting topological order for use in `tred::dag_transitive_reduction_closure`. -/// -/// `toposort` must be a topological order on the node indices of `g` (for example obtained -/// from [`toposort`]). -/// -/// [`toposort`]: ../fn.toposort.html -/// -/// Returns a pair of a graph `res` and the reciprocal of the topological sort `revmap`. -/// -/// `res` is the same graph as `g` with the following differences: -/// * Node and edge weights are stripped, -/// * Node indices are replaced by the corresponding rank in `toposort`, -/// * Iterating on the neighbors of a node respects topological order. -/// -/// `revmap` is handy to get back to map indices in `g` to indices in `res`. -/// ``` -/// use petgraph::prelude::*; -/// use petgraph::graph::DefaultIx; -/// use petgraph::visit::IntoNeighbors; -/// use petgraph::algo::tred::dag_to_toposorted_adjacency_list; -/// -/// let mut g = Graph::<&str, (), Directed, DefaultIx>::new(); -/// let second = g.add_node("second child"); -/// let top = g.add_node("top"); -/// let first = g.add_node("first child"); -/// g.extend_with_edges(&[(top, second), (top, first), (first, second)]); -/// -/// let toposort = vec![top, first, second]; -/// -/// let (res, revmap) = dag_to_toposorted_adjacency_list(&g, &toposort); -/// -/// // let's compute the children of top in topological order -/// let children: Vec<NodeIndex> = res -/// .neighbors(revmap[top.index()]) -/// .map(|ix: NodeIndex| toposort[ix.index()]) -/// .collect(); -/// assert_eq!(children, vec![first, second]) -/// ``` -/// -/// Runtime: **O(|V| + |E|)**. -/// -/// Space complexity: **O(|V| + |E|)**. -pub fn dag_to_toposorted_adjacency_list<G, Ix: IndexType>( - g: G, - toposort: &[G::NodeId], -) -> (UnweightedList<Ix>, Vec<Ix>) -where - G: GraphBase + IntoNeighborsDirected + NodeCompactIndexable + NodeCount, - G::NodeId: IndexType, -{ - let mut res = List::with_capacity(g.node_count()); - // map from old node index to rank in toposort - let mut revmap = vec![Ix::default(); g.node_bound()]; - for (ix, &old_ix) in toposort.iter().enumerate() { - let ix = Ix::new(ix); - revmap[old_ix.index()] = ix; - let iter = g.neighbors_directed(old_ix, Direction::Incoming); - let new_ix: Ix = res.add_node_with_capacity(iter.size_hint().0); - debug_assert_eq!(new_ix.index(), ix.index()); - for old_pre in iter { - let pre: Ix = revmap[old_pre.index()]; - res.add_edge(pre, ix, ()); - } - } - (res, revmap) -} - -/// Computes the transitive reduction and closure of a DAG. -/// -/// The algorithm implemented here comes from [On the calculation of -/// transitive reduction-closure of -/// orders](https://www.sciencedirect.com/science/article/pii/0012365X9390164O) by Habib, Morvan -/// and Rampon. -/// -/// The input graph must be in a very specific format: an adjacency -/// list such that: -/// * Node indices are a toposort, and -/// * The neighbors of all nodes are stored in topological order. -/// -/// To get such a representation, use the function [`dag_to_toposorted_adjacency_list`]. -/// -/// [`dag_to_toposorted_adjacency_list`]: ./fn.dag_to_toposorted_adjacency_list.html -/// -/// The output is the pair of the transitive reduction and the transitive closure. -/// -/// Runtime complexity: **O(|V| + \sum_{(x, y) \in Er} d(y))** where **d(y)** -/// denotes the outgoing degree of **y** in the transitive closure of **G**. -/// This is still **O(|V|³)** in the worst case like the naive algorithm but -/// should perform better for some classes of graphs. -/// -/// Space complexity: **O(|E|)**. -pub fn dag_transitive_reduction_closure<E, Ix: IndexType>( - g: &List<E, Ix>, -) -> (UnweightedList<Ix>, UnweightedList<Ix>) { - let mut tred = List::with_capacity(g.node_count()); - let mut tclos = List::with_capacity(g.node_count()); - let mut mark = FixedBitSet::with_capacity(g.node_count()); - for i in g.node_indices() { - tred.add_node(); - tclos.add_node_with_capacity(g.neighbors(i).len()); - } - // the algorithm relies on this iterator being toposorted - for i in g.node_indices().rev() { - // the algorighm relies on this iterator being toposorted - for x in g.neighbors(i) { - if !mark[x.index()] { - tred.add_edge(i, x, ()); - tclos.add_edge(i, x, ()); - for e in tclos.edge_indices_from(x) { - let y = tclos.edge_endpoints(e).unwrap().1; - if !mark[y.index()] { - mark.insert(y.index()); - tclos.add_edge(i, y, ()); - } - } - } - } - for y in tclos.neighbors(i) { - mark.set(y.index(), false); - } - } - (tred, tclos) -} - -#[cfg(test)] -#[test] -fn test_easy_tred() { - let mut input = List::new(); - let a: u8 = input.add_node(); - let b = input.add_node(); - let c = input.add_node(); - input.add_edge(a, b, ()); - input.add_edge(a, c, ()); - input.add_edge(b, c, ()); - let (tred, tclos) = dag_transitive_reduction_closure(&input); - assert_eq!(tred.node_count(), 3); - assert_eq!(tclos.node_count(), 3); - assert!(tred.find_edge(a, b).is_some()); - assert!(tred.find_edge(b, c).is_some()); - assert!(tred.find_edge(a, c).is_none()); - assert!(tclos.find_edge(a, b).is_some()); - assert!(tclos.find_edge(b, c).is_some()); - assert!(tclos.find_edge(a, c).is_some()); -} diff --git a/vendor/petgraph/src/csr.rs b/vendor/petgraph/src/csr.rs deleted file mode 100644 index b4c1f3a0..00000000 --- a/vendor/petgraph/src/csr.rs +++ /dev/null @@ -1,1151 +0,0 @@ -//! Compressed Sparse Row (CSR) is a sparse adjacency matrix graph. - -use std::cmp::{max, Ordering}; -use std::iter::{Enumerate, Zip}; -use std::marker::PhantomData; -use std::ops::{Index, IndexMut, Range}; -use std::slice::Windows; - -use crate::visit::{ - Data, EdgeCount, EdgeRef, GetAdjacencyMatrix, GraphBase, GraphProp, IntoEdgeReferences, - IntoEdges, IntoNeighbors, IntoNodeIdentifiers, IntoNodeReferences, NodeCompactIndexable, - NodeCount, NodeIndexable, Visitable, -}; - -use crate::util::zip; - -#[doc(no_inline)] -pub use crate::graph::{DefaultIx, IndexType}; - -use crate::{Directed, EdgeType, IntoWeightedEdge}; - -/// Csr node index type, a plain integer. -pub type NodeIndex<Ix = DefaultIx> = Ix; -/// Csr edge index type, a plain integer. -pub type EdgeIndex = usize; - -const BINARY_SEARCH_CUTOFF: usize = 32; - -/// Compressed Sparse Row ([`CSR`]) is a sparse adjacency matrix graph. -/// -/// `CSR` is parameterized over: -/// -/// - Associated data `N` for nodes and `E` for edges, called *weights*. -/// The associated data can be of arbitrary type. -/// - Edge type `Ty` that determines whether the graph edges are directed or undirected. -/// - Index type `Ix`, which determines the maximum size of the graph. -/// -/// -/// Using **O(|E| + |V|)** space. -/// -/// Self loops are allowed, no parallel edges. -/// -/// Fast iteration of the outgoing edges of a vertex. -/// -/// [`CSR`]: https://en.wikipedia.org/wiki/Sparse_matrix#Compressed_sparse_row_(CSR,_CRS_or_Yale_format) -#[derive(Debug)] -pub struct Csr<N = (), E = (), Ty = Directed, Ix = DefaultIx> { - /// Column of next edge - column: Vec<NodeIndex<Ix>>, - /// weight of each edge; lock step with column - edges: Vec<E>, - /// Index of start of row Always node_count + 1 long. - /// Last element is always equal to column.len() - row: Vec<usize>, - node_weights: Vec<N>, - edge_count: usize, - ty: PhantomData<Ty>, -} - -impl<N, E, Ty, Ix> Default for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn default() -> Self { - Self::new() - } -} - -impl<N: Clone, E: Clone, Ty, Ix: Clone> Clone for Csr<N, E, Ty, Ix> { - fn clone(&self) -> Self { - Csr { - column: self.column.clone(), - edges: self.edges.clone(), - row: self.row.clone(), - node_weights: self.node_weights.clone(), - edge_count: self.edge_count, - ty: self.ty, - } - } -} - -impl<N, E, Ty, Ix> Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - /// Create an empty `Csr`. - pub fn new() -> Self { - Csr { - column: vec![], - edges: vec![], - row: vec![0; 1], - node_weights: vec![], - edge_count: 0, - ty: PhantomData, - } - } - - /// Create a new `Csr` with `n` nodes. `N` must implement [`Default`] for the weight of each node. - /// - /// [`Default`]: https://doc.rust-lang.org/nightly/core/default/trait.Default.html - /// - /// # Example - /// ```rust - /// use petgraph::csr::Csr; - /// use petgraph::prelude::*; - /// - /// let graph = Csr::<u8,()>::with_nodes(5); - /// assert_eq!(graph.node_count(),5); - /// assert_eq!(graph.edge_count(),0); - /// - /// assert_eq!(graph[0],0); - /// assert_eq!(graph[4],0); - /// ``` - pub fn with_nodes(n: usize) -> Self - where - N: Default, - { - Csr { - column: Vec::new(), - edges: Vec::new(), - row: vec![0; n + 1], - node_weights: (0..n).map(|_| N::default()).collect(), - edge_count: 0, - ty: PhantomData, - } - } -} - -/// Csr creation error: edges were not in sorted order. -#[derive(Clone, Debug)] -pub struct EdgesNotSorted { - #[allow(unused)] - first_error: (usize, usize), -} - -impl<N, E, Ix> Csr<N, E, Directed, Ix> -where - Ix: IndexType, -{ - /// Create a new `Csr` from a sorted sequence of edges - /// - /// Edges **must** be sorted and unique, where the sort order is the default - /// order for the pair *(u, v)* in Rust (*u* has priority). - /// - /// Computes in **O(|E| + |V|)** time. - /// # Example - /// ```rust - /// use petgraph::csr::Csr; - /// use petgraph::prelude::*; - /// - /// let graph = Csr::<(),()>::from_sorted_edges(&[ - /// (0, 1), (0, 2), - /// (1, 0), (1, 2), (1, 3), - /// (2, 0), - /// (3, 1), - /// ]); - /// ``` - pub fn from_sorted_edges<Edge>(edges: &[Edge]) -> Result<Self, EdgesNotSorted> - where - Edge: Clone + IntoWeightedEdge<E, NodeId = NodeIndex<Ix>>, - N: Default, - { - let max_node_id = match edges - .iter() - .map(|edge| { - let (x, y, _) = edge.clone().into_weighted_edge(); - max(x.index(), y.index()) - }) - .max() - { - None => return Ok(Self::with_nodes(0)), - Some(x) => x, - }; - let mut self_ = Self::with_nodes(max_node_id + 1); - let mut iter = edges.iter().cloned().peekable(); - { - let mut rows = self_.row.iter_mut(); - - let mut rstart = 0; - let mut last_target; - 'outer: for (node, r) in (&mut rows).enumerate() { - *r = rstart; - last_target = None; - 'inner: loop { - if let Some(edge) = iter.peek() { - let (n, m, weight) = edge.clone().into_weighted_edge(); - // check that the edges are in increasing sequence - if node > n.index() { - return Err(EdgesNotSorted { - first_error: (n.index(), m.index()), - }); - } - /* - debug_assert!(node <= n.index(), - concat!("edges are not sorted, ", - "failed assertion source {:?} <= {:?} ", - "for edge {:?}"), - node, n, (n, m)); - */ - if n.index() != node { - break 'inner; - } - // check that the edges are in increasing sequence - /* - debug_assert!(last_target.map_or(true, |x| m > x), - "edges are not sorted, failed assertion {:?} < {:?}", - last_target, m); - */ - if !last_target.map_or(true, |x| m > x) { - return Err(EdgesNotSorted { - first_error: (n.index(), m.index()), - }); - } - last_target = Some(m); - self_.column.push(m); - self_.edges.push(weight); - rstart += 1; - } else { - break 'outer; - } - iter.next(); - } - } - for r in rows { - *r = rstart; - } - } - - Ok(self_) - } -} - -impl<N, E, Ty, Ix> Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - pub fn node_count(&self) -> usize { - self.row.len() - 1 - } - - pub fn edge_count(&self) -> usize { - if self.is_directed() { - self.column.len() - } else { - self.edge_count - } - } - - pub fn is_directed(&self) -> bool { - Ty::is_directed() - } - - /// Remove all edges - pub fn clear_edges(&mut self) { - self.column.clear(); - self.edges.clear(); - for r in &mut self.row { - *r = 0; - } - if !self.is_directed() { - self.edge_count = 0; - } - } - - /// Adds a new node with the given weight, returning the corresponding node index. - pub fn add_node(&mut self, weight: N) -> NodeIndex<Ix> { - let i = self.row.len() - 1; - self.row.insert(i, self.column.len()); - self.node_weights.insert(i, weight); - Ix::new(i) - } - - /// Return `true` if the edge was added - /// - /// If you add all edges in row-major order, the time complexity - /// is **O(|V|·|E|)** for the whole operation. - /// - /// **Panics** if `a` or `b` are out of bounds. - pub fn add_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> bool - where - E: Clone, - { - let ret = self.add_edge_(a, b, weight.clone()); - if ret && !self.is_directed() { - self.edge_count += 1; - } - if ret && !self.is_directed() && a != b { - let _ret2 = self.add_edge_(b, a, weight); - debug_assert_eq!(ret, _ret2); - } - ret - } - - // Return false if the edge already exists - fn add_edge_(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> bool { - assert!(a.index() < self.node_count() && b.index() < self.node_count()); - // a x b is at (a, b) in the matrix - - // find current range of edges from a - let pos = match self.find_edge_pos(a, b) { - Ok(_) => return false, /* already exists */ - Err(i) => i, - }; - self.column.insert(pos, b); - self.edges.insert(pos, weight); - // update row vector - for r in &mut self.row[a.index() + 1..] { - *r += 1; - } - true - } - - fn find_edge_pos(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> Result<usize, usize> { - let (index, neighbors) = self.neighbors_of(a); - if neighbors.len() < BINARY_SEARCH_CUTOFF { - for (i, elt) in neighbors.iter().enumerate() { - match elt.cmp(&b) { - Ordering::Equal => return Ok(i + index), - Ordering::Greater => return Err(i + index), - Ordering::Less => {} - } - } - Err(neighbors.len() + index) - } else { - match neighbors.binary_search(&b) { - Ok(i) => Ok(i + index), - Err(i) => Err(i + index), - } - } - } - - /// Computes in **O(log |V|)** time. - /// - /// **Panics** if the node `a` does not exist. - pub fn contains_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - self.find_edge_pos(a, b).is_ok() - } - - fn neighbors_range(&self, a: NodeIndex<Ix>) -> Range<usize> { - let index = self.row[a.index()]; - let end = self - .row - .get(a.index() + 1) - .cloned() - .unwrap_or(self.column.len()); - index..end - } - - fn neighbors_of(&self, a: NodeIndex<Ix>) -> (usize, &[Ix]) { - let r = self.neighbors_range(a); - (r.start, &self.column[r]) - } - - /// Computes in **O(1)** time. - /// - /// **Panics** if the node `a` does not exist. - pub fn out_degree(&self, a: NodeIndex<Ix>) -> usize { - let r = self.neighbors_range(a); - r.end - r.start - } - - /// Computes in **O(1)** time. - /// - /// **Panics** if the node `a` does not exist. - pub fn neighbors_slice(&self, a: NodeIndex<Ix>) -> &[NodeIndex<Ix>] { - self.neighbors_of(a).1 - } - - /// Computes in **O(1)** time. - /// - /// **Panics** if the node `a` does not exist. - pub fn edges_slice(&self, a: NodeIndex<Ix>) -> &[E] { - &self.edges[self.neighbors_range(a)] - } - - /// Return an iterator of all edges of `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// **Panics** if the node `a` does not exist.<br> - /// Iterator element type is `EdgeReference<E, Ty, Ix>`. - pub fn edges(&self, a: NodeIndex<Ix>) -> Edges<E, Ty, Ix> { - let r = self.neighbors_range(a); - Edges { - index: r.start, - source: a, - iter: zip(&self.column[r.clone()], &self.edges[r]), - ty: self.ty, - } - } -} - -#[derive(Clone, Debug)] -pub struct Edges<'a, E: 'a, Ty = Directed, Ix: 'a = DefaultIx> { - index: usize, - source: NodeIndex<Ix>, - iter: Zip<SliceIter<'a, NodeIndex<Ix>>, SliceIter<'a, E>>, - ty: PhantomData<Ty>, -} - -#[derive(Debug)] -pub struct EdgeReference<'a, E: 'a, Ty, Ix: 'a = DefaultIx> { - index: EdgeIndex, - source: NodeIndex<Ix>, - target: NodeIndex<Ix>, - weight: &'a E, - ty: PhantomData<Ty>, -} - -impl<E, Ty, Ix: Copy> Clone for EdgeReference<'_, E, Ty, Ix> { - fn clone(&self) -> Self { - *self - } -} - -impl<E, Ty, Ix: Copy> Copy for EdgeReference<'_, E, Ty, Ix> {} - -impl<'a, Ty, E, Ix> EdgeReference<'a, E, Ty, Ix> -where - Ty: EdgeType, -{ - /// Access the edge’s weight. - /// - /// **NOTE** that this method offers a longer lifetime - /// than the trait (unfortunately they don't match yet). - pub fn weight(&self) -> &'a E { - self.weight - } -} - -impl<E, Ty, Ix> EdgeRef for EdgeReference<'_, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex; - type Weight = E; - - fn source(&self) -> Self::NodeId { - self.source - } - fn target(&self) -> Self::NodeId { - self.target - } - fn weight(&self) -> &E { - self.weight - } - fn id(&self) -> Self::EdgeId { - self.index - } -} - -impl<'a, E, Ty, Ix> Iterator for Edges<'a, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ty, Ix>; - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(move |(&j, w)| { - let index = self.index; - self.index += 1; - EdgeReference { - index, - source: self.source, - target: j, - weight: w, - ty: PhantomData, - } - }) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -impl<N, E, Ty, Ix> Data for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeWeight = N; - type EdgeWeight = E; -} - -impl<'a, N, E, Ty, Ix> IntoEdgeReferences for &'a Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgeRef = EdgeReference<'a, E, Ty, Ix>; - type EdgeReferences = EdgeReferences<'a, E, Ty, Ix>; - fn edge_references(self) -> Self::EdgeReferences { - EdgeReferences { - index: 0, - source_index: Ix::new(0), - edge_ranges: self.row.windows(2).enumerate(), - column: &self.column, - edges: &self.edges, - iter: zip(&[], &[]), - ty: self.ty, - } - } -} - -#[derive(Debug, Clone)] -pub struct EdgeReferences<'a, E: 'a, Ty, Ix: 'a> { - source_index: NodeIndex<Ix>, - index: usize, - edge_ranges: Enumerate<Windows<'a, usize>>, - column: &'a [NodeIndex<Ix>], - edges: &'a [E], - iter: Zip<SliceIter<'a, NodeIndex<Ix>>, SliceIter<'a, E>>, - ty: PhantomData<Ty>, -} - -impl<'a, E, Ty, Ix> Iterator for EdgeReferences<'a, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ty, Ix>; - fn next(&mut self) -> Option<Self::Item> { - loop { - if let Some((&j, w)) = self.iter.next() { - let index = self.index; - self.index += 1; - return Some(EdgeReference { - index, - source: self.source_index, - target: j, - weight: w, - ty: PhantomData, - }); - } - if let Some((i, w)) = self.edge_ranges.next() { - let a = w[0]; - let b = w[1]; - self.iter = zip(&self.column[a..b], &self.edges[a..b]); - self.source_index = Ix::new(i); - } else { - return None; - } - } - } -} - -impl<'a, N, E, Ty, Ix> IntoEdges for &'a Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Edges = Edges<'a, E, Ty, Ix>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - self.edges(a) - } -} - -impl<N, E, Ty, Ix> GraphBase for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex; // index into edges vector -} - -use fixedbitset::FixedBitSet; - -impl<N, E, Ty, Ix> Visitable for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Map = FixedBitSet; - fn visit_map(&self) -> FixedBitSet { - FixedBitSet::with_capacity(self.node_count()) - } - fn reset_map(&self, map: &mut Self::Map) { - map.clear(); - map.grow(self.node_count()); - } -} - -use std::slice::Iter as SliceIter; - -#[derive(Clone, Debug)] -pub struct Neighbors<'a, Ix: 'a = DefaultIx> { - iter: SliceIter<'a, NodeIndex<Ix>>, -} - -impl<Ix> Iterator for Neighbors<'_, Ix> -where - Ix: IndexType, -{ - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().cloned() - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -impl<'a, N, E, Ty, Ix> IntoNeighbors for &'a Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Neighbors = Neighbors<'a, Ix>; - - /// Return an iterator of all neighbors of `a`. - /// - /// - `Directed`: Targets of outgoing edges from `a`. - /// - `Undirected`: Opposing endpoints of all edges connected to `a`. - /// - /// **Panics** if the node `a` does not exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - fn neighbors(self, a: Self::NodeId) -> Self::Neighbors { - Neighbors { - iter: self.neighbors_slice(a).iter(), - } - } -} - -impl<N, E, Ty, Ix> NodeIndexable for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_bound(&self) -> usize { - self.node_count() - } - fn to_index(&self, a: Self::NodeId) -> usize { - a.index() - } - fn from_index(&self, ix: usize) -> Self::NodeId { - Ix::new(ix) - } -} - -impl<N, E, Ty, Ix> NodeCompactIndexable for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ -} - -impl<N, E, Ty, Ix> Index<NodeIndex<Ix>> for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Output = N; - - fn index(&self, ix: NodeIndex<Ix>) -> &N { - &self.node_weights[ix.index()] - } -} - -impl<N, E, Ty, Ix> IndexMut<NodeIndex<Ix>> for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn index_mut(&mut self, ix: NodeIndex<Ix>) -> &mut N { - &mut self.node_weights[ix.index()] - } -} - -#[derive(Debug, Clone)] -pub struct NodeIdentifiers<Ix = DefaultIx> { - r: Range<usize>, - ty: PhantomData<Ix>, -} - -impl<Ix> Iterator for NodeIdentifiers<Ix> -where - Ix: IndexType, -{ - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.r.next().map(Ix::new) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.r.size_hint() - } -} - -impl<N, E, Ty, Ix> IntoNodeIdentifiers for &Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeIdentifiers = NodeIdentifiers<Ix>; - fn node_identifiers(self) -> Self::NodeIdentifiers { - NodeIdentifiers { - r: 0..self.node_count(), - ty: PhantomData, - } - } -} - -impl<N, E, Ty, Ix> NodeCount for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_count(&self) -> usize { - (*self).node_count() - } -} - -impl<N, E, Ty, Ix> EdgeCount for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - #[inline] - fn edge_count(&self) -> usize { - self.edge_count() - } -} - -impl<N, E, Ty, Ix> GraphProp for Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgeType = Ty; -} - -impl<'a, N, E, Ty, Ix> IntoNodeReferences for &'a Csr<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeRef = (NodeIndex<Ix>, &'a N); - type NodeReferences = NodeReferences<'a, N, Ix>; - fn node_references(self) -> Self::NodeReferences { - NodeReferences { - iter: self.node_weights.iter().enumerate(), - ty: PhantomData, - } - } -} - -/// Iterator over all nodes of a graph. -#[derive(Debug, Clone)] -pub struct NodeReferences<'a, N: 'a, Ix: IndexType = DefaultIx> { - iter: Enumerate<SliceIter<'a, N>>, - ty: PhantomData<Ix>, -} - -impl<'a, N, Ix> Iterator for NodeReferences<'a, N, Ix> -where - Ix: IndexType, -{ - type Item = (NodeIndex<Ix>, &'a N); - - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(|(i, weight)| (Ix::new(i), weight)) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -impl<N, Ix> DoubleEndedIterator for NodeReferences<'_, N, Ix> -where - Ix: IndexType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.iter - .next_back() - .map(|(i, weight)| (Ix::new(i), weight)) - } -} - -impl<N, Ix> ExactSizeIterator for NodeReferences<'_, N, Ix> where Ix: IndexType {} - -/// The adjacency matrix for **Csr** is a bitmap that's computed by -/// `.adjacency_matrix()`. -impl<N, E, Ty, Ix> GetAdjacencyMatrix for &Csr<N, E, Ty, Ix> -where - Ix: IndexType, - Ty: EdgeType, -{ - type AdjMatrix = FixedBitSet; - - fn adjacency_matrix(&self) -> FixedBitSet { - let n = self.node_count(); - let mut matrix = FixedBitSet::with_capacity(n * n); - for edge in self.edge_references() { - let i = n * edge.source().index() + edge.target().index(); - matrix.put(i); - - if !self.is_directed() { - let j = edge.source().index() + n * edge.target().index(); - matrix.put(j); - } - } - matrix - } - - fn is_adjacent(&self, matrix: &FixedBitSet, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - let n = self.node_count(); - let index = n * a.index() + b.index(); - matrix.contains(index) - } -} - -/* - * -Example - -[ a 0 b - c d e - 0 0 f ] - -Values: [a, b, c, d, e, f] -Column: [0, 2, 0, 1, 2, 2] -Row : [0, 2, 5] <- value index of row start - - * */ - -#[cfg(test)] -mod tests { - use super::Csr; - use crate::algo::bellman_ford; - use crate::algo::find_negative_cycle; - use crate::algo::tarjan_scc; - use crate::visit::Dfs; - use crate::visit::VisitMap; - use crate::Undirected; - - #[test] - fn csr1() { - let mut m: Csr = Csr::with_nodes(3); - m.add_edge(0, 0, ()); - m.add_edge(1, 2, ()); - m.add_edge(2, 2, ()); - m.add_edge(0, 2, ()); - m.add_edge(1, 0, ()); - m.add_edge(1, 1, ()); - println!("{:?}", m); - assert_eq!(&m.column, &[0, 2, 0, 1, 2, 2]); - assert_eq!(&m.row, &[0, 2, 5, 6]); - - let added = m.add_edge(1, 2, ()); - assert!(!added); - assert_eq!(&m.column, &[0, 2, 0, 1, 2, 2]); - assert_eq!(&m.row, &[0, 2, 5, 6]); - - assert_eq!(m.neighbors_slice(1), &[0, 1, 2]); - assert_eq!(m.node_count(), 3); - assert_eq!(m.edge_count(), 6); - } - - #[test] - fn csr_undirected() { - /* - [ 1 . 1 - . . 1 - 1 1 1 ] - */ - - let mut m: Csr<(), (), Undirected> = Csr::with_nodes(3); - m.add_edge(0, 0, ()); - m.add_edge(0, 2, ()); - m.add_edge(1, 2, ()); - m.add_edge(2, 2, ()); - println!("{:?}", m); - assert_eq!(&m.column, &[0, 2, 2, 0, 1, 2]); - assert_eq!(&m.row, &[0, 2, 3, 6]); - assert_eq!(m.node_count(), 3); - assert_eq!(m.edge_count(), 4); - } - - #[should_panic] - #[test] - fn csr_from_error_1() { - // not sorted in source - let m: Csr = Csr::from_sorted_edges(&[(0, 1), (1, 0), (0, 2)]).unwrap(); - println!("{:?}", m); - } - - #[should_panic] - #[test] - fn csr_from_error_2() { - // not sorted in target - let m: Csr = Csr::from_sorted_edges(&[(0, 1), (1, 0), (1, 2), (1, 1)]).unwrap(); - println!("{:?}", m); - } - - #[test] - fn csr_from() { - let m: Csr = - Csr::from_sorted_edges(&[(0, 1), (0, 2), (1, 0), (1, 1), (2, 2), (2, 4)]).unwrap(); - println!("{:?}", m); - assert_eq!(m.neighbors_slice(0), &[1, 2]); - assert_eq!(m.neighbors_slice(1), &[0, 1]); - assert_eq!(m.neighbors_slice(2), &[2, 4]); - assert_eq!(m.node_count(), 5); - assert_eq!(m.edge_count(), 6); - } - - #[test] - fn csr_dfs() { - let mut m: Csr = Csr::from_sorted_edges(&[ - (0, 1), - (0, 2), - (1, 0), - (1, 1), - (1, 3), - (2, 2), - // disconnected subgraph - (4, 4), - (4, 5), - ]) - .unwrap(); - println!("{:?}", m); - let mut dfs = Dfs::new(&m, 0); - while dfs.next(&m).is_some() {} - for i in 0..m.node_count() - 2 { - assert!(dfs.discovered.is_visited(&i), "visited {}", i) - } - assert!(!dfs.discovered[4]); - assert!(!dfs.discovered[5]); - - m.add_edge(1, 4, ()); - println!("{:?}", m); - - dfs.reset(&m); - dfs.move_to(0); - while dfs.next(&m).is_some() {} - - for i in 0..m.node_count() { - assert!(dfs.discovered[i], "visited {}", i) - } - } - - #[test] - fn csr_tarjan() { - let m: Csr = Csr::from_sorted_edges(&[ - (0, 1), - (0, 2), - (1, 0), - (1, 1), - (1, 3), - (2, 2), - (2, 4), - (4, 4), - (4, 5), - (5, 2), - ]) - .unwrap(); - println!("{:?}", m); - println!("{:?}", tarjan_scc(&m)); - } - - #[test] - fn test_bellman_ford() { - let m: Csr<(), _> = Csr::from_sorted_edges(&[ - (0, 1, 0.5), - (0, 2, 2.), - (1, 0, 1.), - (1, 1, 1.), - (1, 2, 1.), - (1, 3, 1.), - (2, 3, 3.), - (4, 5, 1.), - (5, 7, 2.), - (6, 7, 1.), - (7, 8, 3.), - ]) - .unwrap(); - println!("{:?}", m); - let result = bellman_ford(&m, 0).unwrap(); - println!("{:?}", result); - let answer = [0., 0.5, 1.5, 1.5]; - assert_eq!(&answer, &result.distances[..4]); - assert!(result.distances[4..].iter().all(|&x| f64::is_infinite(x))); - } - - #[test] - fn test_bellman_ford_neg_cycle() { - let m: Csr<(), _> = Csr::from_sorted_edges(&[ - (0, 1, 0.5), - (0, 2, 2.), - (1, 0, 1.), - (1, 1, -1.), - (1, 2, 1.), - (1, 3, 1.), - (2, 3, 3.), - ]) - .unwrap(); - let result = bellman_ford(&m, 0); - assert!(result.is_err()); - } - - #[test] - fn test_find_neg_cycle1() { - let m: Csr<(), _> = Csr::from_sorted_edges(&[ - (0, 1, 0.5), - (0, 2, 2.), - (1, 0, 1.), - (1, 1, -1.), - (1, 2, 1.), - (1, 3, 1.), - (2, 3, 3.), - ]) - .unwrap(); - let result = find_negative_cycle(&m, 0); - assert_eq!(result, Some([1].to_vec())); - } - - #[test] - fn test_find_neg_cycle2() { - let m: Csr<(), _> = Csr::from_sorted_edges(&[ - (0, 1, 0.5), - (0, 2, 2.), - (1, 0, 1.), - (1, 2, 1.), - (1, 3, 1.), - (2, 3, 3.), - ]) - .unwrap(); - let result = find_negative_cycle(&m, 0); - assert_eq!(result, None); - } - - #[test] - fn test_find_neg_cycle3() { - let m: Csr<(), _> = Csr::from_sorted_edges(&[ - (0, 1, 1.), - (0, 2, 1.), - (0, 3, 1.), - (1, 3, 1.), - (2, 1, 1.), - (3, 2, -3.), - ]) - .unwrap(); - let result = find_negative_cycle(&m, 0); - assert_eq!(result, Some([1, 3, 2].to_vec())); - } - - #[test] - fn test_find_neg_cycle4() { - let m: Csr<(), _> = Csr::from_sorted_edges(&[(0, 0, -1.)]).unwrap(); - let result = find_negative_cycle(&m, 0); - assert_eq!(result, Some([0].to_vec())); - } - - #[test] - fn test_edge_references() { - use crate::visit::EdgeRef; - use crate::visit::IntoEdgeReferences; - let m: Csr<(), _> = Csr::from_sorted_edges(&[ - (0, 1, 0.5), - (0, 2, 2.), - (1, 0, 1.), - (1, 1, 1.), - (1, 2, 1.), - (1, 3, 1.), - (2, 3, 3.), - (4, 5, 1.), - (5, 7, 2.), - (6, 7, 1.), - (7, 8, 3.), - ]) - .unwrap(); - let mut copy = Vec::new(); - for e in m.edge_references() { - copy.push((e.source(), e.target(), *e.weight())); - println!("{:?}", e); - } - let m2: Csr<(), _> = Csr::from_sorted_edges(©).unwrap(); - assert_eq!(&m.row, &m2.row); - assert_eq!(&m.column, &m2.column); - assert_eq!(&m.edges, &m2.edges); - } - - #[test] - fn test_add_node() { - let mut g: Csr = Csr::new(); - let a = g.add_node(()); - let b = g.add_node(()); - let c = g.add_node(()); - - assert!(g.add_edge(a, b, ())); - assert!(g.add_edge(b, c, ())); - assert!(g.add_edge(c, a, ())); - - println!("{:?}", g); - - assert_eq!(g.node_count(), 3); - - assert_eq!(g.neighbors_slice(a), &[b]); - assert_eq!(g.neighbors_slice(b), &[c]); - assert_eq!(g.neighbors_slice(c), &[a]); - - assert_eq!(g.edge_count(), 3); - } - - #[test] - fn test_add_node_with_existing_edges() { - let mut g: Csr = Csr::new(); - let a = g.add_node(()); - let b = g.add_node(()); - - assert!(g.add_edge(a, b, ())); - - let c = g.add_node(()); - - println!("{:?}", g); - - assert_eq!(g.node_count(), 3); - - assert_eq!(g.neighbors_slice(a), &[b]); - assert_eq!(g.neighbors_slice(b), &[]); - assert_eq!(g.neighbors_slice(c), &[]); - - assert_eq!(g.edge_count(), 1); - } - - #[test] - fn test_node_references() { - use crate::visit::IntoNodeReferences; - let mut g: Csr<u32> = Csr::new(); - g.add_node(42); - g.add_node(3); - g.add_node(44); - - let mut refs = g.node_references(); - assert_eq!(refs.next(), Some((0, &42))); - assert_eq!(refs.next(), Some((1, &3))); - assert_eq!(refs.next(), Some((2, &44))); - assert_eq!(refs.next(), None); - } -} diff --git a/vendor/petgraph/src/data.rs b/vendor/petgraph/src/data.rs deleted file mode 100644 index 90d25ebc..00000000 --- a/vendor/petgraph/src/data.rs +++ /dev/null @@ -1,478 +0,0 @@ -//! Graph traits for associated data and graph construction. - -use crate::graph::IndexType; -#[cfg(feature = "graphmap")] -use crate::graphmap::{GraphMap, NodeTrait}; -#[cfg(feature = "stable_graph")] -use crate::stable_graph::StableGraph; -use crate::visit::{Data, NodeCount, NodeIndexable, Reversed}; -use crate::EdgeType; -use crate::Graph; - -trait_template! { - /// Access node and edge weights (associated data). -#[allow(clippy::needless_arbitrary_self_type)] -pub trait DataMap : Data { - @section self - fn node_weight(self: &Self, id: Self::NodeId) -> Option<&Self::NodeWeight>; - fn edge_weight(self: &Self, id: Self::EdgeId) -> Option<&Self::EdgeWeight>; -} -} - -macro_rules! access0 { - ($e:expr) => { - $e.0 - }; -} - -DataMap! {delegate_impl []} -DataMap! {delegate_impl [['a, G], G, &'a mut G, deref_twice]} -DataMap! {delegate_impl [[G], G, Reversed<G>, access0]} - -trait_template! { - /// Access node and edge weights mutably. -#[allow(clippy::needless_arbitrary_self_type)] -pub trait DataMapMut : DataMap { - @section self - fn node_weight_mut(self: &mut Self, id: Self::NodeId) -> Option<&mut Self::NodeWeight>; - fn edge_weight_mut(self: &mut Self, id: Self::EdgeId) -> Option<&mut Self::EdgeWeight>; -} -} - -DataMapMut! {delegate_impl [['a, G], G, &'a mut G, deref_twice]} -DataMapMut! {delegate_impl [[G], G, Reversed<G>, access0]} - -/// A graph that can be extended with further nodes and edges -pub trait Build: Data + NodeCount { - fn add_node(&mut self, weight: Self::NodeWeight) -> Self::NodeId; - /// Add a new edge. If parallel edges (duplicate) are not allowed and - /// the edge already exists, return `None`. - fn add_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Option<Self::EdgeId> { - Some(self.update_edge(a, b, weight)) - } - /// Add or update the edge from `a` to `b`. Return the id of the affected - /// edge. - fn update_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Self::EdgeId; -} - -/// A graph that can be created -pub trait Create: Build + Default { - fn with_capacity(nodes: usize, edges: usize) -> Self; -} - -impl<N, E, Ty, Ix> Data for Graph<N, E, Ty, Ix> -where - Ix: IndexType, -{ - type NodeWeight = N; - type EdgeWeight = E; -} - -impl<N, E, Ty, Ix> DataMap for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_weight(&self, id: Self::NodeId) -> Option<&Self::NodeWeight> { - self.node_weight(id) - } - fn edge_weight(&self, id: Self::EdgeId) -> Option<&Self::EdgeWeight> { - self.edge_weight(id) - } -} - -impl<N, E, Ty, Ix> DataMapMut for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_weight_mut(&mut self, id: Self::NodeId) -> Option<&mut Self::NodeWeight> { - self.node_weight_mut(id) - } - fn edge_weight_mut(&mut self, id: Self::EdgeId) -> Option<&mut Self::EdgeWeight> { - self.edge_weight_mut(id) - } -} - -#[cfg(feature = "stable_graph")] -impl<N, E, Ty, Ix> DataMap for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_weight(&self, id: Self::NodeId) -> Option<&Self::NodeWeight> { - self.node_weight(id) - } - fn edge_weight(&self, id: Self::EdgeId) -> Option<&Self::EdgeWeight> { - self.edge_weight(id) - } -} - -#[cfg(feature = "stable_graph")] -impl<N, E, Ty, Ix> DataMapMut for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_weight_mut(&mut self, id: Self::NodeId) -> Option<&mut Self::NodeWeight> { - self.node_weight_mut(id) - } - fn edge_weight_mut(&mut self, id: Self::EdgeId) -> Option<&mut Self::EdgeWeight> { - self.edge_weight_mut(id) - } -} - -impl<N, E, Ty, Ix> Build for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn add_node(&mut self, weight: Self::NodeWeight) -> Self::NodeId { - self.add_node(weight) - } - fn add_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Option<Self::EdgeId> { - Some(self.add_edge(a, b, weight)) - } - fn update_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Self::EdgeId { - self.update_edge(a, b, weight) - } -} - -#[cfg(feature = "stable_graph")] -impl<N, E, Ty, Ix> Build for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn add_node(&mut self, weight: Self::NodeWeight) -> Self::NodeId { - self.add_node(weight) - } - fn add_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Option<Self::EdgeId> { - Some(self.add_edge(a, b, weight)) - } - fn update_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Self::EdgeId { - self.update_edge(a, b, weight) - } -} - -#[cfg(feature = "graphmap")] -impl<N, E, Ty> Build for GraphMap<N, E, Ty> -where - Ty: EdgeType, - N: NodeTrait, -{ - fn add_node(&mut self, weight: Self::NodeWeight) -> Self::NodeId { - self.add_node(weight) - } - fn add_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Option<Self::EdgeId> { - if self.contains_edge(a, b) { - None - } else { - let r = self.add_edge(a, b, weight); - debug_assert!(r.is_none()); - Some((a, b)) - } - } - fn update_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Self::EdgeId { - self.add_edge(a, b, weight); - (a, b) - } -} - -impl<N, E, Ty, Ix> Create for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn with_capacity(nodes: usize, edges: usize) -> Self { - Self::with_capacity(nodes, edges) - } -} - -#[cfg(feature = "stable_graph")] -impl<N, E, Ty, Ix> Create for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn with_capacity(nodes: usize, edges: usize) -> Self { - Self::with_capacity(nodes, edges) - } -} - -#[cfg(feature = "graphmap")] -impl<N, E, Ty> Create for GraphMap<N, E, Ty> -where - Ty: EdgeType, - N: NodeTrait, -{ - fn with_capacity(nodes: usize, edges: usize) -> Self { - Self::with_capacity(nodes, edges) - } -} - -/// A graph element. -/// -/// A sequence of Elements, for example an iterator, is laid out as follows: -/// Nodes are implicitly given the index of their appearance in the sequence. -/// The edges’ source and target fields refer to these indices. -#[derive(Clone, Debug, PartialEq, Eq)] -pub enum Element<N, E> { - /// A graph node. - Node { weight: N }, - /// A graph edge. - Edge { - source: usize, - target: usize, - weight: E, - }, -} - -/// Create a graph from an iterator of elements. -pub trait FromElements: Create { - fn from_elements<I>(iterable: I) -> Self - where - Self: Sized, - I: IntoIterator<Item = Element<Self::NodeWeight, Self::EdgeWeight>>, - { - let mut gr = Self::with_capacity(0, 0); - // usize -> NodeId map - let mut map = Vec::new(); - for element in iterable { - match element { - Element::Node { weight } => { - map.push(gr.add_node(weight)); - } - Element::Edge { - source, - target, - weight, - } => { - gr.add_edge(map[source], map[target], weight); - } - } - } - gr - } -} - -fn from_elements_indexable<G, I>(iterable: I) -> G -where - G: Create + NodeIndexable, - I: IntoIterator<Item = Element<G::NodeWeight, G::EdgeWeight>>, -{ - let mut gr = G::with_capacity(0, 0); - let map = |gr: &G, i| gr.from_index(i); - for element in iterable { - match element { - Element::Node { weight } => { - gr.add_node(weight); - } - Element::Edge { - source, - target, - weight, - } => { - let from = map(&gr, source); - let to = map(&gr, target); - gr.add_edge(from, to, weight); - } - } - } - gr -} - -impl<N, E, Ty, Ix> FromElements for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn from_elements<I>(iterable: I) -> Self - where - Self: Sized, - I: IntoIterator<Item = Element<Self::NodeWeight, Self::EdgeWeight>>, - { - from_elements_indexable(iterable) - } -} - -#[cfg(feature = "stable_graph")] -impl<N, E, Ty, Ix> FromElements for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn from_elements<I>(iterable: I) -> Self - where - Self: Sized, - I: IntoIterator<Item = Element<Self::NodeWeight, Self::EdgeWeight>>, - { - from_elements_indexable(iterable) - } -} - -#[cfg(feature = "graphmap")] -impl<N, E, Ty> FromElements for GraphMap<N, E, Ty> -where - Ty: EdgeType, - N: NodeTrait, -{ - fn from_elements<I>(iterable: I) -> Self - where - Self: Sized, - I: IntoIterator<Item = Element<Self::NodeWeight, Self::EdgeWeight>>, - { - from_elements_indexable(iterable) - } -} - -/// Iterator adaptors for iterators of `Element`. -pub trait ElementIterator<N, E>: Iterator<Item = Element<N, E>> { - /// Create an iterator adaptor that filters graph elements. - /// - /// The function `f` is called with each element and if its return value - /// is `true` the element is accepted and if `false` it is removed. - /// `f` is called with mutable references to the node and edge weights, - /// so that they can be mutated (but the edge endpoints can not). - /// - /// This filter adapts the edge source and target indices in the - /// stream so that they are correct after the removals. - fn filter_elements<F>(self, f: F) -> FilterElements<Self, F> - where - Self: Sized, - F: FnMut(Element<&mut N, &mut E>) -> bool, - { - FilterElements { - iter: self, - node_index: 0, - map: Vec::new(), - f, - } - } -} - -impl<N, E, I: ?Sized> ElementIterator<N, E> for I where I: Iterator<Item = Element<N, E>> {} - -/// An iterator that filters graph elements. -/// -/// See [`.filter_elements()`][1] for more information. -/// -/// [1]: trait.ElementIterator.html#method.filter_elements -#[derive(Debug, Clone)] -pub struct FilterElements<I, F> { - iter: I, - node_index: usize, - map: Vec<usize>, - f: F, -} - -impl<I, F, N, E> Iterator for FilterElements<I, F> -where - I: Iterator<Item = Element<N, E>>, - F: FnMut(Element<&mut N, &mut E>) -> bool, -{ - type Item = Element<N, E>; - - fn next(&mut self) -> Option<Self::Item> { - loop { - let mut elt = self.iter.next()?; - let keep = (self.f)(match elt { - Element::Node { ref mut weight } => Element::Node { weight }, - Element::Edge { - source, - target, - ref mut weight, - } => Element::Edge { - source, - target, - weight, - }, - }); - let is_node = if let Element::Node { .. } = elt { - true - } else { - false - }; - if !keep && is_node { - self.map.push(self.node_index); - } - if is_node { - self.node_index += 1; - } - if !keep { - continue; - } - - // map edge parts - match elt { - Element::Edge { - ref mut source, - ref mut target, - .. - } => { - // Find the node indices in the map of removed ones. - // If a node was removed, the edge is as well. - // Otherwise the counts are adjusted by the number of nodes - // removed. - // Example: map: [1, 3, 4, 6] - // binary search for 2, result is Err(1). One node has been - // removed before 2. - match self.map.binary_search(source) { - Ok(_) => continue, - Err(i) => *source -= i, - } - match self.map.binary_search(target) { - Ok(_) => continue, - Err(i) => *target -= i, - } - } - Element::Node { .. } => {} - } - return Some(elt); - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} diff --git a/vendor/petgraph/src/dot.rs b/vendor/petgraph/src/dot.rs deleted file mode 100644 index 82ed518d..00000000 --- a/vendor/petgraph/src/dot.rs +++ /dev/null @@ -1,371 +0,0 @@ -//! Simple graphviz dot file format output. - -use std::fmt::{self, Display, Write}; - -use crate::visit::{ - EdgeRef, GraphProp, IntoEdgeReferences, IntoNodeReferences, NodeIndexable, NodeRef, -}; - -/// `Dot` implements output to graphviz .dot format for a graph. -/// -/// Formatting and options are rather simple, this is mostly intended -/// for debugging. Exact output may change. -/// -/// # Examples -/// -/// ``` -/// use petgraph::Graph; -/// use petgraph::dot::{Dot, Config}; -/// -/// let mut graph = Graph::<_, ()>::new(); -/// graph.add_node("A"); -/// graph.add_node("B"); -/// graph.add_node("C"); -/// graph.add_node("D"); -/// graph.extend_with_edges(&[ -/// (0, 1), (0, 2), (0, 3), -/// (1, 2), (1, 3), -/// (2, 3), -/// ]); -/// -/// println!("{:?}", Dot::with_config(&graph, &[Config::EdgeNoLabel])); -/// -/// // In this case the output looks like this: -/// // -/// // digraph { -/// // 0 [label="\"A\""] -/// // 1 [label="\"B\""] -/// // 2 [label="\"C\""] -/// // 3 [label="\"D\""] -/// // 0 -> 1 -/// // 0 -> 2 -/// // 0 -> 3 -/// // 1 -> 2 -/// // 1 -> 3 -/// // 2 -> 3 -/// // } -/// -/// // If you need multiple config options, just list them all in the slice. -/// ``` -pub struct Dot<'a, G> -where - G: IntoEdgeReferences + IntoNodeReferences, -{ - graph: G, - get_edge_attributes: &'a dyn Fn(G, G::EdgeRef) -> String, - get_node_attributes: &'a dyn Fn(G, G::NodeRef) -> String, - config: Configs, -} - -static TYPE: [&str; 2] = ["graph", "digraph"]; -static EDGE: [&str; 2] = ["--", "->"]; -static INDENT: &str = " "; - -impl<'a, G> Dot<'a, G> -where - G: IntoNodeReferences + IntoEdgeReferences, -{ - /// Create a `Dot` formatting wrapper with default configuration. - #[inline] - pub fn new(graph: G) -> Self { - Self::with_config(graph, &[]) - } - - /// Create a `Dot` formatting wrapper with custom configuration. - #[inline] - pub fn with_config(graph: G, config: &'a [Config]) -> Self { - Self::with_attr_getters(graph, config, &|_, _| String::new(), &|_, _| String::new()) - } - - #[inline] - pub fn with_attr_getters( - graph: G, - config: &'a [Config], - get_edge_attributes: &'a dyn Fn(G, G::EdgeRef) -> String, - get_node_attributes: &'a dyn Fn(G, G::NodeRef) -> String, - ) -> Self { - let config = Configs::extract(config); - Dot { - graph, - get_edge_attributes, - get_node_attributes, - config, - } - } -} - -/// `Dot` configuration. -/// -/// This enum does not have an exhaustive definition (will be expanded) -// TODO: #[non_exhaustive] once MSRV >= 1.40, -// and/or for a breaking change make this something like an EnumSet: https://docs.rs/enumset -#[derive(Debug, PartialEq, Eq)] -pub enum Config { - /// Use indices for node labels. - NodeIndexLabel, - /// Use indices for edge labels. - EdgeIndexLabel, - /// Use no edge labels. - EdgeNoLabel, - /// Use no node labels. - NodeNoLabel, - /// Do not print the graph/digraph string. - GraphContentOnly, - #[doc(hidden)] - _Incomplete(()), -} -macro_rules! make_config_struct { - ($($variant:ident,)*) => { - #[allow(non_snake_case)] - #[derive(Default)] - struct Configs { - $($variant: bool,)* - } - impl Configs { - #[inline] - fn extract(configs: &[Config]) -> Self { - let mut conf = Self::default(); - for c in configs { - match *c { - $(Config::$variant => conf.$variant = true,)* - Config::_Incomplete(()) => {} - } - } - conf - } - } - } -} -make_config_struct!( - NodeIndexLabel, - EdgeIndexLabel, - EdgeNoLabel, - NodeNoLabel, - GraphContentOnly, -); - -impl<G> Dot<'_, G> -where - G: IntoNodeReferences + IntoEdgeReferences + NodeIndexable + GraphProp, -{ - fn graph_fmt<NF, EF>(&self, f: &mut fmt::Formatter, node_fmt: NF, edge_fmt: EF) -> fmt::Result - where - NF: Fn(&G::NodeWeight, &mut fmt::Formatter) -> fmt::Result, - EF: Fn(&G::EdgeWeight, &mut fmt::Formatter) -> fmt::Result, - { - let g = self.graph; - if !self.config.GraphContentOnly { - writeln!(f, "{} {{", TYPE[g.is_directed() as usize])?; - } - - // output all labels - for node in g.node_references() { - write!(f, "{}{} [ ", INDENT, g.to_index(node.id()),)?; - if !self.config.NodeNoLabel { - write!(f, "label = \"")?; - if self.config.NodeIndexLabel { - write!(f, "{}", g.to_index(node.id()))?; - } else { - Escaped(FnFmt(node.weight(), &node_fmt)).fmt(f)?; - } - write!(f, "\" ")?; - } - writeln!(f, "{}]", (self.get_node_attributes)(g, node))?; - } - // output all edges - for (i, edge) in g.edge_references().enumerate() { - write!( - f, - "{}{} {} {} [ ", - INDENT, - g.to_index(edge.source()), - EDGE[g.is_directed() as usize], - g.to_index(edge.target()), - )?; - if !self.config.EdgeNoLabel { - write!(f, "label = \"")?; - if self.config.EdgeIndexLabel { - write!(f, "{}", i)?; - } else { - Escaped(FnFmt(edge.weight(), &edge_fmt)).fmt(f)?; - } - write!(f, "\" ")?; - } - writeln!(f, "{}]", (self.get_edge_attributes)(g, edge))?; - } - - if !self.config.GraphContentOnly { - writeln!(f, "}}")?; - } - Ok(()) - } -} - -impl<G> fmt::Display for Dot<'_, G> -where - G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp, - G::EdgeWeight: fmt::Display, - G::NodeWeight: fmt::Display, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.graph_fmt(f, fmt::Display::fmt, fmt::Display::fmt) - } -} - -impl<G> fmt::LowerHex for Dot<'_, G> -where - G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp, - G::EdgeWeight: fmt::LowerHex, - G::NodeWeight: fmt::LowerHex, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.graph_fmt(f, fmt::LowerHex::fmt, fmt::LowerHex::fmt) - } -} - -impl<G> fmt::UpperHex for Dot<'_, G> -where - G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp, - G::EdgeWeight: fmt::UpperHex, - G::NodeWeight: fmt::UpperHex, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.graph_fmt(f, fmt::UpperHex::fmt, fmt::UpperHex::fmt) - } -} - -impl<G> fmt::Debug for Dot<'_, G> -where - G: IntoEdgeReferences + IntoNodeReferences + NodeIndexable + GraphProp, - G::EdgeWeight: fmt::Debug, - G::NodeWeight: fmt::Debug, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.graph_fmt(f, fmt::Debug::fmt, fmt::Debug::fmt) - } -} - -/// Escape for Graphviz -struct Escaper<W>(W); - -impl<W> fmt::Write for Escaper<W> -where - W: fmt::Write, -{ - fn write_str(&mut self, s: &str) -> fmt::Result { - for c in s.chars() { - self.write_char(c)?; - } - Ok(()) - } - - fn write_char(&mut self, c: char) -> fmt::Result { - match c { - '"' | '\\' => self.0.write_char('\\')?, - // \l is for left justified linebreak - '\n' => return self.0.write_str("\\l"), - _ => {} - } - self.0.write_char(c) - } -} - -/// Pass Display formatting through a simple escaping filter -struct Escaped<T>(T); - -impl<T> fmt::Display for Escaped<T> -where - T: fmt::Display, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - if f.alternate() { - writeln!(&mut Escaper(f), "{:#}", &self.0) - } else { - write!(&mut Escaper(f), "{}", &self.0) - } - } -} - -/// Format data using a specific format function -struct FnFmt<'a, T, F>(&'a T, F); - -impl<'a, T, F> fmt::Display for FnFmt<'a, T, F> -where - F: Fn(&'a T, &mut fmt::Formatter<'_>) -> fmt::Result, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.1(self.0, f) - } -} - -#[cfg(test)] -mod test { - use super::{Config, Dot, Escaper}; - use crate::prelude::Graph; - use crate::visit::NodeRef; - use std::fmt::Write; - - #[test] - fn test_escape() { - let mut buff = String::new(); - { - let mut e = Escaper(&mut buff); - let _ = e.write_str("\" \\ \n"); - } - assert_eq!(buff, "\\\" \\\\ \\l"); - } - - fn simple_graph() -> Graph<&'static str, &'static str> { - let mut graph = Graph::<&str, &str>::new(); - let a = graph.add_node("A"); - let b = graph.add_node("B"); - graph.add_edge(a, b, "edge_label"); - graph - } - - #[test] - fn test_nodeindexlable_option() { - let graph = simple_graph(); - let dot = format!("{:?}", Dot::with_config(&graph, &[Config::NodeIndexLabel])); - assert_eq!(dot, "digraph {\n 0 [ label = \"0\" ]\n 1 [ label = \"1\" ]\n 0 -> 1 [ label = \"\\\"edge_label\\\"\" ]\n}\n"); - } - - #[test] - fn test_edgeindexlable_option() { - let graph = simple_graph(); - let dot = format!("{:?}", Dot::with_config(&graph, &[Config::EdgeIndexLabel])); - assert_eq!(dot, "digraph {\n 0 [ label = \"\\\"A\\\"\" ]\n 1 [ label = \"\\\"B\\\"\" ]\n 0 -> 1 [ label = \"0\" ]\n}\n"); - } - - #[test] - fn test_edgenolable_option() { - let graph = simple_graph(); - let dot = format!("{:?}", Dot::with_config(&graph, &[Config::EdgeNoLabel])); - assert_eq!(dot, "digraph {\n 0 [ label = \"\\\"A\\\"\" ]\n 1 [ label = \"\\\"B\\\"\" ]\n 0 -> 1 [ ]\n}\n"); - } - - #[test] - fn test_nodenolable_option() { - let graph = simple_graph(); - let dot = format!("{:?}", Dot::with_config(&graph, &[Config::NodeNoLabel])); - assert_eq!( - dot, - "digraph {\n 0 [ ]\n 1 [ ]\n 0 -> 1 [ label = \"\\\"edge_label\\\"\" ]\n}\n" - ); - } - - #[test] - fn test_with_attr_getters() { - let graph = simple_graph(); - let dot = format!( - "{:?}", - Dot::with_attr_getters( - &graph, - &[Config::NodeNoLabel, Config::EdgeNoLabel], - &|_, er| format!("label = \"{}\"", er.weight().to_uppercase()), - &|_, nr| format!("label = \"{}\"", nr.weight().to_lowercase()), - ), - ); - assert_eq!(dot, "digraph {\n 0 [ label = \"a\"]\n 1 [ label = \"b\"]\n 0 -> 1 [ label = \"EDGE_LABEL\"]\n}\n"); - } -} diff --git a/vendor/petgraph/src/generate.rs b/vendor/petgraph/src/generate.rs deleted file mode 100644 index 9dc7dbf4..00000000 --- a/vendor/petgraph/src/generate.rs +++ /dev/null @@ -1,133 +0,0 @@ -//! ***Unstable.*** Graph generation. -//! -//! ***Unstable: API may change at any time.*** Depends on `feature = "generate"`. -//! - -use crate::graph::NodeIndex; -use crate::{Directed, EdgeType, Graph}; - -// A DAG has the property that the adjacency matrix is lower triangular, -// diagonal zero. -// -// This means we only allow edges i → j where i < j. -// -// The set of all DAG of a particular size is simply the power set of all -// possible edges. -// -// For a graph of n=3 nodes we have (n - 1) * n / 2 = 3 possible edges. - -/// A graph generator of “all” graphs of a particular size. -/// -/// ***Unstable: API may change at any time.*** Depends on `feature = "generate"`. -pub struct Generator<Ty> { - acyclic: bool, - selfloops: bool, - nodes: usize, - /// number of possible edges - nedges: usize, - /// current edge bitmap - bits: u64, - g: Graph<(), (), Ty>, -} - -impl Generator<Directed> { - /// Generate all possible Directed acyclic graphs (DAGs) of a particular number of vertices. - /// - /// These are only generated with one per isomorphism, so they use - /// one canonical node labeling where node *i* can only have edges to node *j* if *i < j*. - /// - /// For a graph of *k* vertices there are *e = (k - 1) k / 2* possible edges and - /// *2<sup>e</sup>* DAGs. - pub fn directed_acyclic(nodes: usize) -> Self { - assert!(nodes != 0); - let nedges = (nodes - 1) * nodes / 2; - assert!(nedges < 64); - Generator { - acyclic: true, - selfloops: false, - nodes: nodes, - nedges: nedges, - bits: !0, - g: Graph::with_capacity(nodes, nedges), - } - } -} - -impl<Ty: EdgeType> Generator<Ty> { - /// Generate all possible graphs of a particular number of vertices. - /// - /// All permutations are generated, so the graphs are not unique down to isomorphism. - /// - /// For a graph of *k* vertices there are *e = k²* possible edges and - /// *2<sup>k<sup>2</sup></sup>* graphs. - pub fn all(nodes: usize, allow_selfloops: bool) -> Self { - let scale = if Ty::is_directed() { 1 } else { 2 }; - let nedges = if allow_selfloops { - (nodes * nodes - nodes) / scale + nodes - } else { - (nodes * nodes) / scale - nodes - }; - assert!(nedges < 64); - Generator { - acyclic: false, - selfloops: allow_selfloops, - nodes: nodes, - nedges: nedges, - bits: !0, - g: Graph::with_capacity(nodes, nedges), - } - } - - fn state_to_graph(&mut self) -> &Graph<(), (), Ty> { - self.g.clear(); - for _ in 0..self.nodes { - self.g.add_node(()); - } - // For a DAG: - // interpret the bits in order, it's a lower triangular matrix: - // a b c d - // a x x x x - // b 0 x x x - // c 1 2 x x - // d 3 4 5 x - let mut bit = 0; - for i in 0..self.nodes { - let start = if self.acyclic || !self.g.is_directed() { - i - } else { - 0 - }; - for j in start..self.nodes { - if i == j && !self.selfloops { - continue; - } - if self.bits & (1u64 << bit) != 0 { - self.g.add_edge(NodeIndex::new(i), NodeIndex::new(j), ()); - } - - bit += 1; - } - } - &self.g - } - - pub fn next_ref(&mut self) -> Option<&Graph<(), (), Ty>> { - if self.bits == !0 { - self.bits = 0; - } else { - self.bits += 1; - if self.bits >= 1u64 << self.nedges { - return None; - } - } - Some(self.state_to_graph()) - } -} - -impl<Ty: EdgeType> Iterator for Generator<Ty> { - type Item = Graph<(), (), Ty>; - - fn next(&mut self) -> Option<Self::Item> { - self.next_ref().cloned() - } -} diff --git a/vendor/petgraph/src/graph6/graph6_decoder.rs b/vendor/petgraph/src/graph6/graph6_decoder.rs deleted file mode 100644 index c0d6ecfa..00000000 --- a/vendor/petgraph/src/graph6/graph6_decoder.rs +++ /dev/null @@ -1,200 +0,0 @@ -//! [graph6 format](https://users.cecs.anu.edu.au/~bdm/data/formats.txt) decoder for undirected graphs. - -use crate::{csr::Csr, graph::IndexType, Graph, Undirected}; - -#[cfg(feature = "graphmap")] -use crate::graphmap::GraphMap; - -#[cfg(feature = "graphmap")] -use std::hash::BuildHasher; - -#[cfg(feature = "matrix_graph")] -use crate::matrix_graph::{MatrixGraph, Nullable}; - -#[cfg(feature = "stable_graph")] -use crate::stable_graph::{StableGraph, StableUnGraph}; - -const N: usize = 63; - -/// A graph that can be converted from graph6 format string. -pub trait FromGraph6 { - fn from_graph6_string(graph6_string: String) -> Self; -} - -/// Converts a graph6 format string into data can be used to construct an undirected graph. -/// Returns a tuple containing the graph order and its edges. -pub fn from_graph6_representation<Ix>(graph6_representation: String) -> (usize, Vec<(Ix, Ix)>) -where - Ix: IndexType, -{ - let (order_bytes, adj_matrix_bytes) = - get_order_bytes_and_adj_matrix_bytes(graph6_representation); - - let order_bits = bytes_vector_to_bits_vector(order_bytes); - let adj_matrix_bits = bytes_vector_to_bits_vector(adj_matrix_bytes); - - let graph_order = get_bits_as_decimal(order_bits); - let edges = get_edges(graph_order, adj_matrix_bits); - - (graph_order, edges) -} - -// Converts a graph6 format string into a vector of bytes, converted from ASCII characters, -// split into two parts, the first representing the graph order, and the second its adjacency matrix. -fn get_order_bytes_and_adj_matrix_bytes(graph6_representation: String) -> (Vec<usize>, Vec<usize>) { - let bytes: Vec<usize> = graph6_representation - .chars() - .map(|c| (c as usize) - N) - .collect(); - - let mut order_bytes = vec![]; - let mut adj_matrix_bytes = vec![]; - - let first_byte = *bytes.first().unwrap(); - if first_byte == N { - order_bytes.extend_from_slice(&bytes[1..=3]); - adj_matrix_bytes.extend_from_slice(&bytes[4..]); - } else { - order_bytes.push(first_byte); - adj_matrix_bytes.extend_from_slice(&bytes[1..]); - }; - - (order_bytes, adj_matrix_bytes) -} - -// Converts a bytes vector into a bits vector. -fn bytes_vector_to_bits_vector(bytes: Vec<usize>) -> Vec<u8> { - bytes - .iter() - .flat_map(|&byte| get_number_as_bits(byte, 6)) - .collect() -} - -// Get binary representation of `n` as a vector of bits with `bits_length` length. -fn get_number_as_bits(n: usize, bits_length: usize) -> Vec<u8> { - let mut bits = Vec::new(); - for i in (0..bits_length).rev() { - bits.push(((n >> i) & 1) as u8); - } - bits -} - -// Convert a bits vector into its decimal representation. -fn get_bits_as_decimal(bits: Vec<u8>) -> usize { - let bits_str = bits - .iter() - .map(|bit| bit.to_string()) - .collect::<Vec<String>>() - .join(""); - - usize::from_str_radix(&bits_str, 2).unwrap() -} - -// Get graph edges from its order and bits vector representation of its adjacency matrix. -fn get_edges<Ix>(order: usize, adj_matrix_bits: Vec<u8>) -> Vec<(Ix, Ix)> -where - Ix: IndexType, -{ - let mut edges = vec![]; - - let mut i = 0; - for col in 1..order { - for lin in 0..col { - let is_adjacent = adj_matrix_bits[i] == 1; - - if is_adjacent { - edges.push((Ix::new(lin), Ix::new(col))); - }; - - i += 1; - } - } - - edges -} - -impl<Ix: IndexType> FromGraph6 for Graph<(), (), Undirected, Ix> { - fn from_graph6_string(graph6_string: String) -> Self { - let (order, edges): (usize, Vec<(Ix, Ix)>) = from_graph6_representation(graph6_string); - - let mut graph: Graph<(), (), Undirected, Ix> = Graph::with_capacity(order, edges.len()); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges); - - graph - } -} - -#[cfg(feature = "stable_graph")] -impl<Ix: IndexType> FromGraph6 for StableGraph<(), (), Undirected, Ix> { - fn from_graph6_string(graph6_string: String) -> Self { - let (order, edges): (usize, Vec<(Ix, Ix)>) = from_graph6_representation(graph6_string); - - let mut graph: StableGraph<(), (), Undirected, Ix> = - StableUnGraph::with_capacity(order, edges.len()); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges); - - graph - } -} - -#[cfg(feature = "graphmap")] -impl<Ix: IndexType, S: BuildHasher + Default> FromGraph6 for GraphMap<Ix, (), Undirected, S> { - fn from_graph6_string(graph6_string: String) -> Self { - let (order, edges): (usize, Vec<(Ix, Ix)>) = from_graph6_representation(graph6_string); - - let mut graph: GraphMap<Ix, (), Undirected, S> = - GraphMap::with_capacity(order, edges.len()); - for i in 0..order { - graph.add_node(Ix::new(i)); - } - for (a, b) in edges { - graph.add_edge(a, b, ()); - } - - graph - } -} - -#[cfg(feature = "matrix_graph")] -impl<Null, Ix> FromGraph6 for MatrixGraph<(), (), Undirected, Null, Ix> -where - Null: Nullable<Wrapped = ()>, - Ix: IndexType, -{ - fn from_graph6_string(graph6_string: String) -> Self { - let (order, edges): (usize, Vec<(Ix, Ix)>) = from_graph6_representation(graph6_string); - - let mut graph: MatrixGraph<(), (), Undirected, Null, Ix> = - MatrixGraph::with_capacity(order); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges.iter()); - - graph - } -} - -impl<Ix: IndexType> FromGraph6 for Csr<(), (), Undirected, Ix> { - fn from_graph6_string(graph6_string: String) -> Self { - let (order, edges): (usize, Vec<(Ix, Ix)>) = from_graph6_representation(graph6_string); - - let mut graph: Csr<(), (), Undirected, Ix> = Csr::new(); - let mut nodes = Vec::new(); - for _ in 0..order { - let i = graph.add_node(()); - nodes.push(i); - } - for (a, b) in edges { - graph.add_edge(a, b, ()); - } - - graph - } -} diff --git a/vendor/petgraph/src/graph6/graph6_encoder.rs b/vendor/petgraph/src/graph6/graph6_encoder.rs deleted file mode 100644 index 41ba530a..00000000 --- a/vendor/petgraph/src/graph6/graph6_encoder.rs +++ /dev/null @@ -1,154 +0,0 @@ -//! [graph6 format](https://users.cecs.anu.edu.au/~bdm/data/formats.txt) encoder for undirected graphs. - -use crate::{ - csr::Csr, - graph::IndexType, - visit::{GetAdjacencyMatrix, IntoNodeIdentifiers}, - Graph, Undirected, -}; - -#[cfg(feature = "graphmap")] -use crate::graphmap::{GraphMap, NodeTrait}; - -#[cfg(feature = "graphmap")] -use std::hash::BuildHasher; - -#[cfg(feature = "matrix_graph")] -use crate::matrix_graph::{MatrixGraph, Nullable}; - -#[cfg(feature = "stable_graph")] -use crate::stable_graph::StableGraph; - -const N: usize = 63; - -/// A graph that can be converted to graph6 format string. -pub trait ToGraph6 { - fn graph6_string(&self) -> String; -} - -/// Converts a graph that implements GetAdjacencyMatrix and IntoNodeIdentifers -/// into a graph6 format string. -pub fn get_graph6_representation<G>(graph: G) -> String -where - G: GetAdjacencyMatrix + IntoNodeIdentifiers, -{ - let (graph_order, mut upper_diagonal_as_bits) = get_adj_matrix_upper_diagonal_as_bits(graph); - let mut graph_order_as_bits = get_graph_order_as_bits(graph_order); - - let mut graph_as_bits = vec![]; - graph_as_bits.append(&mut graph_order_as_bits); - graph_as_bits.append(&mut upper_diagonal_as_bits); - - bits_to_ascii(graph_as_bits) -} - -// Traverse graph nodes and construct the upper diagonal of its adjacency matrix as a vector of bits. -// Returns a tuple containing: -// - `n`: graph order (number of nodes in graph) -// - `bits`: a vector of 0s and 1s encoding the upper diagonal of the graphs adjacency matrix. -fn get_adj_matrix_upper_diagonal_as_bits<G>(graph: G) -> (usize, Vec<usize>) -where - G: GetAdjacencyMatrix + IntoNodeIdentifiers, -{ - let node_ids_iter = graph.node_identifiers(); - let mut node_ids_vec = vec![]; - - let adj_matrix = graph.adjacency_matrix(); - let mut bits = vec![]; - let mut n = 0; - for node_id in node_ids_iter { - node_ids_vec.push(node_id); - - for i in 1..=n { - let is_adjacent: bool = - graph.is_adjacent(&adj_matrix, node_ids_vec[i - 1], node_ids_vec[n]); - bits.push(if is_adjacent { 1 } else { 0 }); - } - - n += 1; - } - - (n, bits) -} - -// Converts graph order to a bits vector. -fn get_graph_order_as_bits(order: usize) -> Vec<usize> { - let to_convert_to_bits = if order < N { - vec![(order, 6)] - } else if order <= 258047 { - vec![(N, 6), (order, 18)] - } else { - panic!("Graph order not supported.") - }; - - to_convert_to_bits - .iter() - .flat_map(|&(n, n_of_bits)| get_number_as_bits(n, n_of_bits)) - .collect() -} - -// Get binary representation of `n` as a vector of bits with `bits_length` length. -fn get_number_as_bits(n: usize, bits_length: usize) -> Vec<usize> { - let mut bits = Vec::new(); - for i in (0..bits_length).rev() { - bits.push((n >> i) & 1); - } - bits -} - -// Convert a vector of bits to a String using ASCII encoding. -// Each 6 bits will be converted to a single ASCII character. -fn bits_to_ascii(mut bits: Vec<usize>) -> String { - while bits.len() % 6 != 0 { - bits.push(0); - } - - let bits_strs = bits.iter().map(|bit| bit.to_string()).collect::<Vec<_>>(); - - let bytes = bits_strs - .chunks(6) - .map(|bits_chunk| bits_chunk.join("")) - .map(|bits_str| usize::from_str_radix(&bits_str, 2)); - - bytes - .map(|byte| char::from((N + byte.unwrap()) as u8)) - .collect() -} - -impl<N, E, Ix: IndexType> ToGraph6 for Graph<N, E, Undirected, Ix> { - fn graph6_string(&self) -> String { - get_graph6_representation(self) - } -} - -#[cfg(feature = "stable_graph")] -impl<N, E, Ix: IndexType> ToGraph6 for StableGraph<N, E, Undirected, Ix> { - fn graph6_string(&self) -> String { - get_graph6_representation(self) - } -} - -#[cfg(feature = "graphmap")] -impl<N: NodeTrait, E, S: BuildHasher> ToGraph6 for GraphMap<N, E, Undirected, S> { - fn graph6_string(&self) -> String { - get_graph6_representation(self) - } -} - -#[cfg(feature = "matrix_graph")] -impl<N, E, Null, Ix> ToGraph6 for MatrixGraph<N, E, Undirected, Null, Ix> -where - N: NodeTrait, - Null: Nullable<Wrapped = E>, - Ix: IndexType, -{ - fn graph6_string(&self) -> String { - get_graph6_representation(self) - } -} - -impl<N, E, Ix: IndexType> ToGraph6 for Csr<N, E, Undirected, Ix> { - fn graph6_string(&self) -> String { - get_graph6_representation(self) - } -} diff --git a/vendor/petgraph/src/graph6/mod.rs b/vendor/petgraph/src/graph6/mod.rs deleted file mode 100644 index 0d16f0c7..00000000 --- a/vendor/petgraph/src/graph6/mod.rs +++ /dev/null @@ -1,7 +0,0 @@ -//! Traits related to [graph6 format](https://users.cecs.anu.edu.au/~bdm/data/formats.txt) for undirected graphs. - -pub use self::graph6_decoder::*; -pub use self::graph6_encoder::*; - -mod graph6_decoder; -mod graph6_encoder; diff --git a/vendor/petgraph/src/graph_impl/frozen.rs b/vendor/petgraph/src/graph_impl/frozen.rs deleted file mode 100644 index 52dfb4d9..00000000 --- a/vendor/petgraph/src/graph_impl/frozen.rs +++ /dev/null @@ -1,108 +0,0 @@ -use std::ops::{Deref, Index, IndexMut}; - -use super::Frozen; -use crate::data::{DataMap, DataMapMut}; -use crate::graph::Graph; -use crate::graph::{GraphIndex, IndexType}; -use crate::visit::{ - Data, EdgeCount, EdgeIndexable, GetAdjacencyMatrix, GraphBase, GraphProp, IntoEdges, - IntoEdgesDirected, IntoNeighborsDirected, IntoNodeIdentifiers, NodeCompactIndexable, NodeCount, - NodeIndexable, -}; -use crate::visit::{IntoEdgeReferences, IntoNeighbors, IntoNodeReferences, Visitable}; -use crate::{Direction, EdgeType}; - -impl<'a, G> Frozen<'a, G> { - /// Create a new `Frozen` from a mutable reference to a graph. - pub fn new(gr: &'a mut G) -> Self { - Frozen(gr) - } -} - -/// Deref allows transparent access to all shared reference (read-only) -/// functionality in the underlying graph. -impl<G> Deref for Frozen<'_, G> { - type Target = G; - fn deref(&self) -> &G { - self.0 - } -} - -impl<G, I> Index<I> for Frozen<'_, G> -where - G: Index<I>, -{ - type Output = G::Output; - fn index(&self, i: I) -> &G::Output { - self.0.index(i) - } -} - -impl<G, I> IndexMut<I> for Frozen<'_, G> -where - G: IndexMut<I>, -{ - fn index_mut(&mut self, i: I) -> &mut G::Output { - self.0.index_mut(i) - } -} - -impl<N, E, Ty, Ix> Frozen<'_, Graph<N, E, Ty, Ix>> -where - Ty: EdgeType, - Ix: IndexType, -{ - #[allow(clippy::type_complexity)] - /// Index the `Graph` by two indices, any combination of - /// node or edge indices is fine. - /// - /// **Panics** if the indices are equal or if they are out of bounds. - pub fn index_twice_mut<T, U>( - &mut self, - i: T, - j: U, - ) -> ( - &mut <Graph<N, E, Ty, Ix> as Index<T>>::Output, - &mut <Graph<N, E, Ty, Ix> as Index<U>>::Output, - ) - where - Graph<N, E, Ty, Ix>: IndexMut<T> + IndexMut<U>, - T: GraphIndex, - U: GraphIndex, - { - self.0.index_twice_mut(i, j) - } -} - -macro_rules! access0 { - ($e:expr) => { - $e.0 - }; -} - -impl<G> GraphBase for Frozen<'_, G> -where - G: GraphBase, -{ - type NodeId = G::NodeId; - type EdgeId = G::EdgeId; -} - -Data! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -DataMap! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -DataMapMut! {delegate_impl [['a, G], G, Frozen<'a, G>, access0]} -GetAdjacencyMatrix! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -IntoEdgeReferences! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -IntoEdges! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -IntoEdgesDirected! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -IntoNeighbors! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -IntoNeighborsDirected! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -IntoNodeIdentifiers! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -IntoNodeReferences! {delegate_impl [['a, 'b, G], G, &'b Frozen<'a, G>, deref_twice]} -NodeCompactIndexable! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -NodeCount! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -NodeIndexable! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -EdgeCount! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -EdgeIndexable! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -GraphProp! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} -Visitable! {delegate_impl [['a, G], G, Frozen<'a, G>, deref_twice]} diff --git a/vendor/petgraph/src/graph_impl/mod.rs b/vendor/petgraph/src/graph_impl/mod.rs deleted file mode 100644 index 3a123f72..00000000 --- a/vendor/petgraph/src/graph_impl/mod.rs +++ /dev/null @@ -1,2411 +0,0 @@ -use std::cmp; -use std::fmt; -use std::hash::Hash; -use std::iter; -use std::marker::PhantomData; -use std::mem::size_of; -use std::ops::{Index, IndexMut, Range}; -use std::slice; - -use fixedbitset::FixedBitSet; - -use crate::{Directed, Direction, EdgeType, Incoming, IntoWeightedEdge, Outgoing, Undirected}; - -use crate::iter_format::{DebugMap, IterFormatExt, NoPretty}; - -use crate::util::enumerate; -use crate::visit; - -#[cfg(feature = "serde-1")] -mod serialization; - -/// The default integer type for graph indices. -/// `u32` is the default to reduce the size of the graph's data and improve -/// performance in the common case. -/// -/// Used for node and edge indices in `Graph` and `StableGraph`, used -/// for node indices in `Csr`. -pub type DefaultIx = u32; - -/// Trait for the unsigned integer type used for node and edge indices. -/// -/// # Safety -/// -/// Marked `unsafe` because: the trait must faithfully preserve -/// and convert index values. -pub unsafe trait IndexType: Copy + Default + Hash + Ord + fmt::Debug + 'static { - fn new(x: usize) -> Self; - fn index(&self) -> usize; - fn max() -> Self; -} - -unsafe impl IndexType for usize { - #[inline(always)] - fn new(x: usize) -> Self { - x - } - #[inline(always)] - fn index(&self) -> Self { - *self - } - #[inline(always)] - fn max() -> Self { - ::std::usize::MAX - } -} - -unsafe impl IndexType for u32 { - #[inline(always)] - fn new(x: usize) -> Self { - x as u32 - } - #[inline(always)] - fn index(&self) -> usize { - *self as usize - } - #[inline(always)] - fn max() -> Self { - ::std::u32::MAX - } -} - -unsafe impl IndexType for u16 { - #[inline(always)] - fn new(x: usize) -> Self { - x as u16 - } - #[inline(always)] - fn index(&self) -> usize { - *self as usize - } - #[inline(always)] - fn max() -> Self { - ::std::u16::MAX - } -} - -unsafe impl IndexType for u8 { - #[inline(always)] - fn new(x: usize) -> Self { - x as u8 - } - #[inline(always)] - fn index(&self) -> usize { - *self as usize - } - #[inline(always)] - fn max() -> Self { - ::std::u8::MAX - } -} - -/// Node identifier. -#[derive(Copy, Clone, Default, PartialEq, PartialOrd, Eq, Ord, Hash)] -pub struct NodeIndex<Ix = DefaultIx>(Ix); - -impl<Ix: IndexType> NodeIndex<Ix> { - #[inline] - pub fn new(x: usize) -> Self { - NodeIndex(IndexType::new(x)) - } - - #[inline] - pub fn index(self) -> usize { - self.0.index() - } - - #[inline] - pub fn end() -> Self { - NodeIndex(IndexType::max()) - } - - fn _into_edge(self) -> EdgeIndex<Ix> { - EdgeIndex(self.0) - } -} - -unsafe impl<Ix: IndexType> IndexType for NodeIndex<Ix> { - fn index(&self) -> usize { - self.0.index() - } - fn new(x: usize) -> Self { - NodeIndex::new(x) - } - fn max() -> Self { - NodeIndex(<Ix as IndexType>::max()) - } -} - -impl<Ix: IndexType> From<Ix> for NodeIndex<Ix> { - fn from(ix: Ix) -> Self { - NodeIndex(ix) - } -} - -impl<Ix: fmt::Debug> fmt::Debug for NodeIndex<Ix> { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "NodeIndex({:?})", self.0) - } -} - -/// Short version of `NodeIndex::new` -pub fn node_index<Ix: IndexType>(index: usize) -> NodeIndex<Ix> { - NodeIndex::new(index) -} - -/// Short version of `EdgeIndex::new` -pub fn edge_index<Ix: IndexType>(index: usize) -> EdgeIndex<Ix> { - EdgeIndex::new(index) -} - -/// Edge identifier. -#[derive(Copy, Clone, Default, PartialEq, PartialOrd, Eq, Ord, Hash)] -pub struct EdgeIndex<Ix = DefaultIx>(Ix); - -impl<Ix: IndexType> EdgeIndex<Ix> { - #[inline] - pub fn new(x: usize) -> Self { - EdgeIndex(IndexType::new(x)) - } - - #[inline] - pub fn index(self) -> usize { - self.0.index() - } - - /// An invalid `EdgeIndex` used to denote absence of an edge, for example - /// to end an adjacency list. - #[inline] - pub fn end() -> Self { - EdgeIndex(IndexType::max()) - } - - fn _into_node(self) -> NodeIndex<Ix> { - NodeIndex(self.0) - } -} - -impl<Ix: IndexType> From<Ix> for EdgeIndex<Ix> { - fn from(ix: Ix) -> Self { - EdgeIndex(ix) - } -} - -impl<Ix: fmt::Debug> fmt::Debug for EdgeIndex<Ix> { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "EdgeIndex({:?})", self.0) - } -} -/* - * FIXME: Use this impl again, when we don't need to add so many bounds -impl<Ix: IndexType> fmt::Debug for EdgeIndex<Ix> -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - try!(write!(f, "EdgeIndex(")); - if *self == EdgeIndex::end() { - try!(write!(f, "End")); - } else { - try!(write!(f, "{}", self.index())); - } - write!(f, ")") - } -} -*/ - -const DIRECTIONS: [Direction; 2] = [Outgoing, Incoming]; - -/// The graph's node type. -#[derive(Debug)] -pub struct Node<N, Ix = DefaultIx> { - /// Associated node data. - pub weight: N, - /// Next edge in outgoing and incoming edge lists. - next: [EdgeIndex<Ix>; 2], -} - -impl<E, Ix> Clone for Node<E, Ix> -where - E: Clone, - Ix: Copy, -{ - clone_fields!(Node, weight, next,); -} - -impl<N, Ix: IndexType> Node<N, Ix> { - /// Accessor for data structure internals: the first edge in the given direction. - pub fn next_edge(&self, dir: Direction) -> EdgeIndex<Ix> { - self.next[dir.index()] - } -} - -/// The graph's edge type. -#[derive(Debug)] -pub struct Edge<E, Ix = DefaultIx> { - /// Associated edge data. - pub weight: E, - /// Next edge in outgoing and incoming edge lists. - next: [EdgeIndex<Ix>; 2], - /// Start and End node index - node: [NodeIndex<Ix>; 2], -} - -impl<E, Ix> Clone for Edge<E, Ix> -where - E: Clone, - Ix: Copy, -{ - clone_fields!(Edge, weight, next, node,); -} - -impl<E, Ix: IndexType> Edge<E, Ix> { - /// Accessor for data structure internals: the next edge for the given direction. - pub fn next_edge(&self, dir: Direction) -> EdgeIndex<Ix> { - self.next[dir.index()] - } - - /// Return the source node index. - pub fn source(&self) -> NodeIndex<Ix> { - self.node[0] - } - - /// Return the target node index. - pub fn target(&self) -> NodeIndex<Ix> { - self.node[1] - } -} - -/// `Graph<N, E, Ty, Ix>` is a graph datastructure using an adjacency list representation. -/// -/// `Graph` is parameterized over: -/// -/// - Associated data `N` for nodes and `E` for edges, called *weights*. -/// The associated data can be of arbitrary type. -/// - Edge type `Ty` that determines whether the graph edges are directed or undirected. -/// - Index type `Ix`, which determines the maximum size of the graph. -/// -/// The `Graph` is a regular Rust collection and is `Send` and `Sync` (as long -/// as associated data `N` and `E` are). -/// -/// The graph uses **O(|V| + |E|)** space, and allows fast node and edge insert, -/// efficient graph search and graph algorithms. -/// It implements **O(e')** edge lookup and edge and node removals, where **e'** -/// is some local measure of edge count. -/// Based on the graph datastructure used in rustc. -/// -/// Here's an example of building a graph with directed edges, and below -/// an illustration of how it could be rendered with graphviz (see -/// [`Dot`](../dot/struct.Dot.html)): -/// -/// ``` -/// use petgraph::Graph; -/// -/// let mut deps = Graph::<&str, &str>::new(); -/// let pg = deps.add_node("petgraph"); -/// let fb = deps.add_node("fixedbitset"); -/// let qc = deps.add_node("quickcheck"); -/// let rand = deps.add_node("rand"); -/// let libc = deps.add_node("libc"); -/// deps.extend_with_edges(&[ -/// (pg, fb), (pg, qc), -/// (qc, rand), (rand, libc), (qc, libc), -/// ]); -/// ``` -/// -///  -/// -/// ### Graph Indices -/// -/// The graph maintains indices for nodes and edges, and node and edge -/// weights may be accessed mutably. Indices range in a compact interval, for -/// example for *n* nodes indices are 0 to *n* - 1 inclusive. -/// -/// `NodeIndex` and `EdgeIndex` are types that act as references to nodes and edges, -/// but these are only stable across certain operations: -/// -/// * **Removing nodes or edges may shift other indices.** Removing a node will -/// force the last node to shift its index to take its place. Similarly, -/// removing an edge shifts the index of the last edge. -/// * Adding nodes or edges keeps indices stable. -/// -/// The `Ix` parameter is `u32` by default. The goal is that you can ignore this parameter -/// completely unless you need a very big graph -- then you can use `usize`. -/// -/// * The fact that the node and edge indices in the graph each are numbered in compact -/// intervals (from 0 to *n* - 1 for *n* nodes) simplifies some graph algorithms. -/// -/// * You can select graph index integer type after the size of the graph. A smaller -/// size may have better performance. -/// -/// * Using indices allows mutation while traversing the graph, see `Dfs`, -/// and `.neighbors(a).detach()`. -/// -/// * You can create several graphs using the equal node indices but with -/// differing weights or differing edges. -/// -/// * Indices don't allow as much compile time checking as references. -/// -pub struct Graph<N, E, Ty = Directed, Ix = DefaultIx> { - nodes: Vec<Node<N, Ix>>, - edges: Vec<Edge<E, Ix>>, - ty: PhantomData<Ty>, -} - -/// A `Graph` with directed edges. -/// -/// For example, an edge from *1* to *2* is distinct from an edge from *2* to -/// *1*. -pub type DiGraph<N, E, Ix = DefaultIx> = Graph<N, E, Directed, Ix>; - -/// A `Graph` with undirected edges. -/// -/// For example, an edge between *1* and *2* is equivalent to an edge between -/// *2* and *1*. -pub type UnGraph<N, E, Ix = DefaultIx> = Graph<N, E, Undirected, Ix>; - -/// The resulting cloned graph has the same graph indices as `self`. -impl<N, E, Ty, Ix: IndexType> Clone for Graph<N, E, Ty, Ix> -where - N: Clone, - E: Clone, -{ - fn clone(&self) -> Self { - Graph { - nodes: self.nodes.clone(), - edges: self.edges.clone(), - ty: self.ty, - } - } - - fn clone_from(&mut self, rhs: &Self) { - self.nodes.clone_from(&rhs.nodes); - self.edges.clone_from(&rhs.edges); - self.ty = rhs.ty; - } -} - -impl<N, E, Ty, Ix> fmt::Debug for Graph<N, E, Ty, Ix> -where - N: fmt::Debug, - E: fmt::Debug, - Ty: EdgeType, - Ix: IndexType, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let etype = if self.is_directed() { - "Directed" - } else { - "Undirected" - }; - let mut fmt_struct = f.debug_struct("Graph"); - fmt_struct.field("Ty", &etype); - fmt_struct.field("node_count", &self.node_count()); - fmt_struct.field("edge_count", &self.edge_count()); - if self.edge_count() > 0 { - fmt_struct.field( - "edges", - &self - .edges - .iter() - .map(|e| NoPretty((e.source().index(), e.target().index()))) - .format(", "), - ); - } - // skip weights if they are ZST! - if size_of::<N>() != 0 { - fmt_struct.field( - "node weights", - &DebugMap(|| self.nodes.iter().map(|n| &n.weight).enumerate()), - ); - } - if size_of::<E>() != 0 { - fmt_struct.field( - "edge weights", - &DebugMap(|| self.edges.iter().map(|n| &n.weight).enumerate()), - ); - } - fmt_struct.finish() - } -} - -enum Pair<T> { - Both(T, T), - One(T), - None, -} - -use std::cmp::max; - -/// Get mutable references at index `a` and `b`. -fn index_twice<T>(slc: &mut [T], a: usize, b: usize) -> Pair<&mut T> { - if max(a, b) >= slc.len() { - Pair::None - } else if a == b { - Pair::One(&mut slc[max(a, b)]) - } else { - // safe because a, b are in bounds and distinct - unsafe { - let ptr = slc.as_mut_ptr(); - let ar = &mut *ptr.add(a); - let br = &mut *ptr.add(b); - Pair::Both(ar, br) - } - } -} - -impl<N, E> Graph<N, E, Directed> { - /// Create a new `Graph` with directed edges. - /// - /// This is a convenience method. Use `Graph::with_capacity` or `Graph::default` for - /// a constructor that is generic in all the type parameters of `Graph`. - pub fn new() -> Self { - Graph { - nodes: Vec::new(), - edges: Vec::new(), - ty: PhantomData, - } - } -} - -impl<N, E> Graph<N, E, Undirected> { - /// Create a new `Graph` with undirected edges. - /// - /// This is a convenience method. Use `Graph::with_capacity` or `Graph::default` for - /// a constructor that is generic in all the type parameters of `Graph`. - pub fn new_undirected() -> Self { - Graph { - nodes: Vec::new(), - edges: Vec::new(), - ty: PhantomData, - } - } -} - -impl<N, E, Ty, Ix> Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - /// Create a new `Graph` with estimated capacity. - pub fn with_capacity(nodes: usize, edges: usize) -> Self { - Graph { - nodes: Vec::with_capacity(nodes), - edges: Vec::with_capacity(edges), - ty: PhantomData, - } - } - - /// Return the number of nodes (vertices) in the graph. - /// - /// Computes in **O(1)** time. - pub fn node_count(&self) -> usize { - self.nodes.len() - } - - /// Return the number of edges in the graph. - /// - /// Computes in **O(1)** time. - pub fn edge_count(&self) -> usize { - self.edges.len() - } - - /// Whether the graph has directed edges or not. - #[inline] - pub fn is_directed(&self) -> bool { - Ty::is_directed() - } - - /// Add a node (also called vertex) with associated data `weight` to the graph. - /// - /// Computes in **O(1)** time. - /// - /// Return the index of the new node. - /// - /// **Panics** if the Graph is at the maximum number of nodes for its index - /// type (N/A if usize). - pub fn add_node(&mut self, weight: N) -> NodeIndex<Ix> { - let node = Node { - weight, - next: [EdgeIndex::end(), EdgeIndex::end()], - }; - let node_idx = NodeIndex::new(self.nodes.len()); - // check for max capacity, except if we use usize - assert!(<Ix as IndexType>::max().index() == !0 || NodeIndex::end() != node_idx); - self.nodes.push(node); - node_idx - } - - /// Access the weight for node `a`. - /// - /// If node `a` doesn't exist in the graph, return `None`. - /// Also available with indexing syntax: `&graph[a]`. - pub fn node_weight(&self, a: NodeIndex<Ix>) -> Option<&N> { - self.nodes.get(a.index()).map(|n| &n.weight) - } - - /// Access the weight for node `a`, mutably. - /// - /// If node `a` doesn't exist in the graph, return `None`. - /// Also available with indexing syntax: `&mut graph[a]`. - pub fn node_weight_mut(&mut self, a: NodeIndex<Ix>) -> Option<&mut N> { - self.nodes.get_mut(a.index()).map(|n| &mut n.weight) - } - - /// Add an edge from `a` to `b` to the graph, with its associated - /// data `weight`. - /// - /// Return the index of the new edge. - /// - /// Computes in **O(1)** time. - /// - /// **Panics** if any of the nodes don't exist.<br> - /// **Panics** if the Graph is at the maximum number of edges for its index - /// type (N/A if usize). - /// - /// **Note:** `Graph` allows adding parallel (“duplicate”) edges. If you want - /// to avoid this, use [`.update_edge(a, b, weight)`](#method.update_edge) instead. - pub fn add_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> EdgeIndex<Ix> { - let edge_idx = EdgeIndex::new(self.edges.len()); - assert!(<Ix as IndexType>::max().index() == !0 || EdgeIndex::end() != edge_idx); - let mut edge = Edge { - weight, - node: [a, b], - next: [EdgeIndex::end(); 2], - }; - match index_twice(&mut self.nodes, a.index(), b.index()) { - Pair::None => panic!("Graph::add_edge: node indices out of bounds"), - Pair::One(an) => { - edge.next = an.next; - an.next[0] = edge_idx; - an.next[1] = edge_idx; - } - Pair::Both(an, bn) => { - // a and b are different indices - edge.next = [an.next[0], bn.next[1]]; - an.next[0] = edge_idx; - bn.next[1] = edge_idx; - } - } - self.edges.push(edge); - edge_idx - } - - /// Add or update an edge from `a` to `b`. - /// If the edge already exists, its weight is updated. - /// - /// Return the index of the affected edge. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to `a` (and `b`, if the graph edges are undirected). - /// - /// **Panics** if any of the nodes doesn't exist. - pub fn update_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> EdgeIndex<Ix> { - if let Some(ix) = self.find_edge(a, b) { - if let Some(ed) = self.edge_weight_mut(ix) { - *ed = weight; - return ix; - } - } - self.add_edge(a, b, weight) - } - - /// Access the weight for edge `e`. - /// - /// If edge `e` doesn't exist in the graph, return `None`. - /// Also available with indexing syntax: `&graph[e]`. - pub fn edge_weight(&self, e: EdgeIndex<Ix>) -> Option<&E> { - self.edges.get(e.index()).map(|ed| &ed.weight) - } - - /// Access the weight for edge `e`, mutably. - /// - /// If edge `e` doesn't exist in the graph, return `None`. - /// Also available with indexing syntax: `&mut graph[e]`. - pub fn edge_weight_mut(&mut self, e: EdgeIndex<Ix>) -> Option<&mut E> { - self.edges.get_mut(e.index()).map(|ed| &mut ed.weight) - } - - /// Access the source and target nodes for `e`. - /// - /// If edge `e` doesn't exist in the graph, return `None`. - pub fn edge_endpoints(&self, e: EdgeIndex<Ix>) -> Option<(NodeIndex<Ix>, NodeIndex<Ix>)> { - self.edges - .get(e.index()) - .map(|ed| (ed.source(), ed.target())) - } - - /// Remove `a` from the graph if it exists, and return its weight. - /// If it doesn't exist in the graph, return `None`. - /// - /// Apart from `a`, this invalidates the last node index in the graph - /// (that node will adopt the removed node index). Edge indices are - /// invalidated as they would be following the removal of each edge - /// with an endpoint in `a`. - /// - /// Computes in **O(e')** time, where **e'** is the number of affected - /// edges, including *n* calls to `.remove_edge()` where *n* is the number - /// of edges with an endpoint in `a`, and including the edges with an - /// endpoint in the displaced node. - pub fn remove_node(&mut self, a: NodeIndex<Ix>) -> Option<N> { - self.nodes.get(a.index())?; - for d in &DIRECTIONS { - let k = d.index(); - - // Remove all edges from and to this node. - loop { - let next = self.nodes[a.index()].next[k]; - if next == EdgeIndex::end() { - break; - } - let ret = self.remove_edge(next); - debug_assert!(ret.is_some()); - let _ = ret; - } - } - - // Use swap_remove -- only the swapped-in node is going to change - // NodeIndex<Ix>, so we only have to walk its edges and update them. - - let node = self.nodes.swap_remove(a.index()); - - // Find the edge lists of the node that had to relocate. - // It may be that no node had to relocate, then we are done already. - let swap_edges = match self.nodes.get(a.index()) { - None => return Some(node.weight), - Some(ed) => ed.next, - }; - - // The swapped element's old index - let old_index = NodeIndex::new(self.nodes.len()); - let new_index = a; - - // Adjust the starts of the out edges, and ends of the in edges. - for &d in &DIRECTIONS { - let k = d.index(); - let mut edges = edges_walker_mut(&mut self.edges, swap_edges[k], d); - while let Some(curedge) = edges.next_edge() { - debug_assert!(curedge.node[k] == old_index); - curedge.node[k] = new_index; - } - } - Some(node.weight) - } - - /// For edge `e` with endpoints `edge_node`, replace links to it, - /// with links to `edge_next`. - fn change_edge_links( - &mut self, - edge_node: [NodeIndex<Ix>; 2], - e: EdgeIndex<Ix>, - edge_next: [EdgeIndex<Ix>; 2], - ) { - for &d in &DIRECTIONS { - let k = d.index(); - let node = match self.nodes.get_mut(edge_node[k].index()) { - Some(r) => r, - None => { - debug_assert!( - false, - "Edge's endpoint dir={:?} index={:?} not found", - d, edge_node[k] - ); - return; - } - }; - let fst = node.next[k]; - if fst == e { - //println!("Updating first edge 0 for node {}, set to {}", edge_node[0], edge_next[0]); - node.next[k] = edge_next[k]; - } else { - let mut edges = edges_walker_mut(&mut self.edges, fst, d); - while let Some(curedge) = edges.next_edge() { - if curedge.next[k] == e { - curedge.next[k] = edge_next[k]; - break; // the edge can only be present once in the list. - } - } - } - } - } - - /// Remove an edge and return its edge weight, or `None` if it didn't exist. - /// - /// Apart from `e`, this invalidates the last edge index in the graph - /// (that edge will adopt the removed edge index). - /// - /// Computes in **O(e')** time, where **e'** is the size of four particular edge lists, for - /// the vertices of `e` and the vertices of another affected edge. - pub fn remove_edge(&mut self, e: EdgeIndex<Ix>) -> Option<E> { - // every edge is part of two lists, - // outgoing and incoming edges. - // Remove it from both - let (edge_node, edge_next) = match self.edges.get(e.index()) { - None => return None, - Some(x) => (x.node, x.next), - }; - // Remove the edge from its in and out lists by replacing it with - // a link to the next in the list. - self.change_edge_links(edge_node, e, edge_next); - self.remove_edge_adjust_indices(e) - } - - fn remove_edge_adjust_indices(&mut self, e: EdgeIndex<Ix>) -> Option<E> { - // swap_remove the edge -- only the removed edge - // and the edge swapped into place are affected and need updating - // indices. - let edge = self.edges.swap_remove(e.index()); - let swap = match self.edges.get(e.index()) { - // no elment needed to be swapped. - None => return Some(edge.weight), - Some(ed) => ed.node, - }; - let swapped_e = EdgeIndex::new(self.edges.len()); - - // Update the edge lists by replacing links to the old index by references to the new - // edge index. - self.change_edge_links(swap, swapped_e, [e, e]); - Some(edge.weight) - } - - /// Return an iterator of all nodes with an edge starting from `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - /// - /// Use [`.neighbors(a).detach()`][1] to get a neighbor walker that does - /// not borrow from the graph. - /// - /// [1]: struct.Neighbors.html#method.detach - pub fn neighbors(&self, a: NodeIndex<Ix>) -> Neighbors<E, Ix> { - self.neighbors_directed(a, Outgoing) - } - - /// Return an iterator of all neighbors that have an edge between them and - /// `a`, in the specified direction. - /// If the graph's edges are undirected, this is equivalent to *.neighbors(a)*. - /// - /// - `Directed`, `Outgoing`: All edges from `a`. - /// - `Directed`, `Incoming`: All edges to `a`. - /// - `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - /// - /// For a `Directed` graph, neighbors are listed in reverse order of their - /// addition to the graph, so the most recently added edge's neighbor is - /// listed first. The order in an `Undirected` graph is arbitrary. - /// - /// Use [`.neighbors_directed(a, dir).detach()`][1] to get a neighbor walker that does - /// not borrow from the graph. - /// - /// [1]: struct.Neighbors.html#method.detach - pub fn neighbors_directed(&self, a: NodeIndex<Ix>, dir: Direction) -> Neighbors<E, Ix> { - let mut iter = self.neighbors_undirected(a); - if self.is_directed() { - let k = dir.index(); - iter.next[1 - k] = EdgeIndex::end(); - iter.skip_start = NodeIndex::end(); - } - iter - } - - /// Return an iterator of all neighbors that have an edge between them and - /// `a`, in either direction. - /// If the graph's edges are undirected, this is equivalent to *.neighbors(a)*. - /// - /// - `Directed` and `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - /// - /// Use [`.neighbors_undirected(a).detach()`][1] to get a neighbor walker that does - /// not borrow from the graph. - /// - /// [1]: struct.Neighbors.html#method.detach - /// - pub fn neighbors_undirected(&self, a: NodeIndex<Ix>) -> Neighbors<E, Ix> { - Neighbors { - skip_start: a, - edges: &self.edges, - next: match self.nodes.get(a.index()) { - None => [EdgeIndex::end(), EdgeIndex::end()], - Some(n) => n.next, - }, - } - } - - /// Return an iterator of all edges of `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edges(&self, a: NodeIndex<Ix>) -> Edges<E, Ty, Ix> { - self.edges_directed(a, Outgoing) - } - - /// Return an iterator of all edges of `a`, in the specified direction. - /// - /// - `Directed`, `Outgoing`: All edges from `a`. - /// - `Directed`, `Incoming`: All edges to `a`. - /// - `Undirected`, `Outgoing`: All edges connected to `a`, with `a` being the source of each - /// edge. - /// - `Undirected`, `Incoming`: All edges connected to `a`, with `a` being the target of each - /// edge. - /// - /// Produces an empty iterator if the node `a` doesn't exist.<br> - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edges_directed(&self, a: NodeIndex<Ix>, dir: Direction) -> Edges<E, Ty, Ix> { - Edges { - skip_start: a, - edges: &self.edges, - direction: dir, - next: match self.nodes.get(a.index()) { - None => [EdgeIndex::end(), EdgeIndex::end()], - Some(n) => n.next, - }, - ty: PhantomData, - } - } - - /// Return an iterator over all the edges connecting `a` and `b`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edges_connecting( - &self, - a: NodeIndex<Ix>, - b: NodeIndex<Ix>, - ) -> EdgesConnecting<E, Ty, Ix> { - EdgesConnecting { - target_node: b, - edges: self.edges_directed(a, Direction::Outgoing), - ty: PhantomData, - } - } - - /// Lookup if there is an edge from `a` to `b`. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to `a` (and `b`, if the graph edges are undirected). - pub fn contains_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - self.find_edge(a, b).is_some() - } - - /// Lookup an edge from `a` to `b`. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to `a` (and `b`, if the graph edges are undirected). - pub fn find_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> Option<EdgeIndex<Ix>> { - if !self.is_directed() { - self.find_edge_undirected(a, b).map(|(ix, _)| ix) - } else { - match self.nodes.get(a.index()) { - None => None, - Some(node) => self.find_edge_directed_from_node(node, b), - } - } - } - - fn find_edge_directed_from_node( - &self, - node: &Node<N, Ix>, - b: NodeIndex<Ix>, - ) -> Option<EdgeIndex<Ix>> { - let mut edix = node.next[0]; - while let Some(edge) = self.edges.get(edix.index()) { - if edge.node[1] == b { - return Some(edix); - } - edix = edge.next[0]; - } - None - } - - /// Lookup an edge between `a` and `b`, in either direction. - /// - /// If the graph is undirected, then this is equivalent to `.find_edge()`. - /// - /// Return the edge index and its directionality, with `Outgoing` meaning - /// from `a` to `b` and `Incoming` the reverse, - /// or `None` if the edge does not exist. - pub fn find_edge_undirected( - &self, - a: NodeIndex<Ix>, - b: NodeIndex<Ix>, - ) -> Option<(EdgeIndex<Ix>, Direction)> { - match self.nodes.get(a.index()) { - None => None, - Some(node) => self.find_edge_undirected_from_node(node, b), - } - } - - fn find_edge_undirected_from_node( - &self, - node: &Node<N, Ix>, - b: NodeIndex<Ix>, - ) -> Option<(EdgeIndex<Ix>, Direction)> { - for &d in &DIRECTIONS { - let k = d.index(); - let mut edix = node.next[k]; - while let Some(edge) = self.edges.get(edix.index()) { - if edge.node[1 - k] == b { - return Some((edix, d)); - } - edix = edge.next[k]; - } - } - None - } - - /// Return an iterator over either the nodes without edges to them - /// (`Incoming`) or from them (`Outgoing`). - /// - /// An *internal* node has both incoming and outgoing edges. - /// The nodes in `.externals(Incoming)` are the source nodes and - /// `.externals(Outgoing)` are the sinks of the graph. - /// - /// For a graph with undirected edges, both the sinks and the sources are - /// just the nodes without edges. - /// - /// The whole iteration computes in **O(|V|)** time. - pub fn externals(&self, dir: Direction) -> Externals<N, Ty, Ix> { - Externals { - iter: self.nodes.iter().enumerate(), - dir, - ty: PhantomData, - } - } - - /// Return an iterator over the node indices of the graph. - /// - /// For example, in a rare case where a graph algorithm were not applicable, - /// the following code will iterate through all nodes to find a - /// specific index: - /// - /// ``` - /// # use petgraph::Graph; - /// # let mut g = Graph::<&str, i32>::new(); - /// # g.add_node("book"); - /// let index = g.node_indices().find(|i| g[*i] == "book").unwrap(); - /// ``` - pub fn node_indices(&self) -> NodeIndices<Ix> { - NodeIndices { - r: 0..self.node_count(), - ty: PhantomData, - } - } - - /// Return an iterator yielding mutable access to all node weights. - /// - /// The order in which weights are yielded matches the order of their - /// node indices. - pub fn node_weights_mut(&mut self) -> NodeWeightsMut<N, Ix> { - NodeWeightsMut { - nodes: self.nodes.iter_mut(), - } - } - - /// Return an iterator yielding immutable access to all node weights. - /// - /// The order in which weights are yielded matches the order of their - /// node indices. - pub fn node_weights(&self) -> NodeWeights<N, Ix> { - NodeWeights { - nodes: self.nodes.iter(), - } - } - - /// Return an iterator over the edge indices of the graph - pub fn edge_indices(&self) -> EdgeIndices<Ix> { - EdgeIndices { - r: 0..self.edge_count(), - ty: PhantomData, - } - } - - /// Create an iterator over all edges, in indexed order. - /// - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edge_references(&self) -> EdgeReferences<E, Ix> { - EdgeReferences { - iter: self.edges.iter().enumerate(), - } - } - - /// Return an iterator yielding immutable access to all edge weights. - /// - /// The order in which weights are yielded matches the order of their - /// edge indices. - pub fn edge_weights(&self) -> EdgeWeights<E, Ix> { - EdgeWeights { - edges: self.edges.iter(), - } - } - /// Return an iterator yielding mutable access to all edge weights. - /// - /// The order in which weights are yielded matches the order of their - /// edge indices. - pub fn edge_weights_mut(&mut self) -> EdgeWeightsMut<E, Ix> { - EdgeWeightsMut { - edges: self.edges.iter_mut(), - } - } - - // Remaining methods are of the more internal flavour, read-only access to - // the data structure's internals. - - /// Access the internal node array. - pub fn raw_nodes(&self) -> &[Node<N, Ix>] { - &self.nodes - } - - /// Access the internal edge array. - pub fn raw_edges(&self) -> &[Edge<E, Ix>] { - &self.edges - } - - #[allow(clippy::type_complexity)] - /// Convert the graph into a vector of Nodes and a vector of Edges - pub fn into_nodes_edges(self) -> (Vec<Node<N, Ix>>, Vec<Edge<E, Ix>>) { - (self.nodes, self.edges) - } - - /// Accessor for data structure internals: the first edge in the given direction. - pub fn first_edge(&self, a: NodeIndex<Ix>, dir: Direction) -> Option<EdgeIndex<Ix>> { - match self.nodes.get(a.index()) { - None => None, - Some(node) => { - let edix = node.next[dir.index()]; - if edix == EdgeIndex::end() { - None - } else { - Some(edix) - } - } - } - } - - /// Accessor for data structure internals: the next edge for the given direction. - pub fn next_edge(&self, e: EdgeIndex<Ix>, dir: Direction) -> Option<EdgeIndex<Ix>> { - match self.edges.get(e.index()) { - None => None, - Some(node) => { - let edix = node.next[dir.index()]; - if edix == EdgeIndex::end() { - None - } else { - Some(edix) - } - } - } - } - - /// Index the `Graph` by two indices, any combination of - /// node or edge indices is fine. - /// - /// **Panics** if the indices are equal or if they are out of bounds. - /// - /// ``` - /// use petgraph::{Graph, Incoming}; - /// use petgraph::visit::Dfs; - /// - /// let mut gr = Graph::new(); - /// let a = gr.add_node(0.); - /// let b = gr.add_node(0.); - /// let c = gr.add_node(0.); - /// gr.add_edge(a, b, 3.); - /// gr.add_edge(b, c, 2.); - /// gr.add_edge(c, b, 1.); - /// - /// // walk the graph and sum incoming edges into the node weight - /// let mut dfs = Dfs::new(&gr, a); - /// while let Some(node) = dfs.next(&gr) { - /// // use a walker -- a detached neighbors iterator - /// let mut edges = gr.neighbors_directed(node, Incoming).detach(); - /// while let Some(edge) = edges.next_edge(&gr) { - /// let (nw, ew) = gr.index_twice_mut(node, edge); - /// *nw += *ew; - /// } - /// } - /// - /// // check the result - /// assert_eq!(gr[a], 0.); - /// assert_eq!(gr[b], 4.); - /// assert_eq!(gr[c], 2.); - /// ``` - pub fn index_twice_mut<T, U>( - &mut self, - i: T, - j: U, - ) -> ( - &mut <Self as Index<T>>::Output, - &mut <Self as Index<U>>::Output, - ) - where - Self: IndexMut<T> + IndexMut<U>, - T: GraphIndex, - U: GraphIndex, - { - assert!(T::is_node_index() != U::is_node_index() || i.index() != j.index()); - - // Allow two mutable indexes here -- they are nonoverlapping - unsafe { - let self_mut = self as *mut _; - ( - <Self as IndexMut<T>>::index_mut(&mut *self_mut, i), - <Self as IndexMut<U>>::index_mut(&mut *self_mut, j), - ) - } - } - - /// Reverse the direction of all edges - pub fn reverse(&mut self) { - // swap edge endpoints, - // edge incoming / outgoing lists, - // node incoming / outgoing lists - for edge in &mut self.edges { - edge.node.swap(0, 1); - edge.next.swap(0, 1); - } - for node in &mut self.nodes { - node.next.swap(0, 1); - } - } - - /// Remove all nodes and edges - pub fn clear(&mut self) { - self.nodes.clear(); - self.edges.clear(); - } - - /// Remove all edges - pub fn clear_edges(&mut self) { - self.edges.clear(); - for node in &mut self.nodes { - node.next = [EdgeIndex::end(), EdgeIndex::end()]; - } - } - - /// Return the current node and edge capacity of the graph. - pub fn capacity(&self) -> (usize, usize) { - (self.nodes.capacity(), self.edges.capacity()) - } - - /// Reserves capacity for at least `additional` more nodes to be inserted in - /// the graph. Graph may reserve more space to avoid frequent reallocations. - /// - /// **Panics** if the new capacity overflows `usize`. - pub fn reserve_nodes(&mut self, additional: usize) { - self.nodes.reserve(additional); - } - - /// Reserves capacity for at least `additional` more edges to be inserted in - /// the graph. Graph may reserve more space to avoid frequent reallocations. - /// - /// **Panics** if the new capacity overflows `usize`. - pub fn reserve_edges(&mut self, additional: usize) { - self.edges.reserve(additional); - } - - /// Reserves the minimum capacity for exactly `additional` more nodes to be - /// inserted in the graph. Does nothing if the capacity is already - /// sufficient. - /// - /// Prefer `reserve_nodes` if future insertions are expected. - /// - /// **Panics** if the new capacity overflows `usize`. - pub fn reserve_exact_nodes(&mut self, additional: usize) { - self.nodes.reserve_exact(additional); - } - - /// Reserves the minimum capacity for exactly `additional` more edges to be - /// inserted in the graph. - /// Does nothing if the capacity is already sufficient. - /// - /// Prefer `reserve_edges` if future insertions are expected. - /// - /// **Panics** if the new capacity overflows `usize`. - pub fn reserve_exact_edges(&mut self, additional: usize) { - self.edges.reserve_exact(additional); - } - - /// Shrinks the capacity of the underlying nodes collection as much as possible. - pub fn shrink_to_fit_nodes(&mut self) { - self.nodes.shrink_to_fit(); - } - - /// Shrinks the capacity of the underlying edges collection as much as possible. - pub fn shrink_to_fit_edges(&mut self) { - self.edges.shrink_to_fit(); - } - - /// Shrinks the capacity of the graph as much as possible. - pub fn shrink_to_fit(&mut self) { - self.nodes.shrink_to_fit(); - self.edges.shrink_to_fit(); - } - - /// Keep all nodes that return `true` from the `visit` closure, - /// remove the others. - /// - /// `visit` is provided a proxy reference to the graph, so that - /// the graph can be walked and associated data modified. - /// - /// The order nodes are visited is not specified. - pub fn retain_nodes<F>(&mut self, mut visit: F) - where - F: FnMut(Frozen<Self>, NodeIndex<Ix>) -> bool, - { - for index in self.node_indices().rev() { - if !visit(Frozen(self), index) { - let ret = self.remove_node(index); - debug_assert!(ret.is_some()); - let _ = ret; - } - } - } - - /// Keep all edges that return `true` from the `visit` closure, - /// remove the others. - /// - /// `visit` is provided a proxy reference to the graph, so that - /// the graph can be walked and associated data modified. - /// - /// The order edges are visited is not specified. - pub fn retain_edges<F>(&mut self, mut visit: F) - where - F: FnMut(Frozen<Self>, EdgeIndex<Ix>) -> bool, - { - for index in self.edge_indices().rev() { - if !visit(Frozen(self), index) { - let ret = self.remove_edge(index); - debug_assert!(ret.is_some()); - let _ = ret; - } - } - } - - /// Create a new `Graph` from an iterable of edges. - /// - /// Node weights `N` are set to default values. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - /// - /// ``` - /// use petgraph::Graph; - /// - /// let gr = Graph::<(), i32>::from_edges(&[ - /// (0, 1), (0, 2), (0, 3), - /// (1, 2), (1, 3), - /// (2, 3), - /// ]); - /// ``` - pub fn from_edges<I>(iterable: I) -> Self - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E>, - <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>, - N: Default, - { - let mut g = Self::with_capacity(0, 0); - g.extend_with_edges(iterable); - g - } - - /// Extend the graph from an iterable of edges. - /// - /// Node weights `N` are set to default values. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - pub fn extend_with_edges<I>(&mut self, iterable: I) - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E>, - <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>, - N: Default, - { - let iter = iterable.into_iter(); - let (low, _) = iter.size_hint(); - self.edges.reserve(low); - - for elt in iter { - let (source, target, weight) = elt.into_weighted_edge(); - let (source, target) = (source.into(), target.into()); - let nx = cmp::max(source, target); - while nx.index() >= self.node_count() { - self.add_node(N::default()); - } - self.add_edge(source, target, weight); - } - } - - /// Create a new `Graph` by mapping node and - /// edge weights to new values. - /// - /// The resulting graph has the same structure and the same - /// graph indices as `self`. - pub fn map<'a, F, G, N2, E2>( - &'a self, - mut node_map: F, - mut edge_map: G, - ) -> Graph<N2, E2, Ty, Ix> - where - F: FnMut(NodeIndex<Ix>, &'a N) -> N2, - G: FnMut(EdgeIndex<Ix>, &'a E) -> E2, - { - let mut g = Graph::with_capacity(self.node_count(), self.edge_count()); - g.nodes.extend(enumerate(&self.nodes).map(|(i, node)| Node { - weight: node_map(NodeIndex::new(i), &node.weight), - next: node.next, - })); - g.edges.extend(enumerate(&self.edges).map(|(i, edge)| Edge { - weight: edge_map(EdgeIndex::new(i), &edge.weight), - next: edge.next, - node: edge.node, - })); - g - } - - /// Create a new `Graph` by mapping nodes and edges. - /// A node or edge may be mapped to `None` to exclude it from - /// the resulting graph. - /// - /// Nodes are mapped first with the `node_map` closure, then - /// `edge_map` is called for the edges that have not had any endpoint - /// removed. - /// - /// The resulting graph has the structure of a subgraph of the original graph. - /// If no nodes are removed, the resulting graph has compatible node - /// indices; if neither nodes nor edges are removed, the result has - /// the same graph indices as `self`. - pub fn filter_map<'a, F, G, N2, E2>( - &'a self, - mut node_map: F, - mut edge_map: G, - ) -> Graph<N2, E2, Ty, Ix> - where - F: FnMut(NodeIndex<Ix>, &'a N) -> Option<N2>, - G: FnMut(EdgeIndex<Ix>, &'a E) -> Option<E2>, - { - let mut g = Graph::with_capacity(0, 0); - // mapping from old node index to new node index, end represents removed. - let mut node_index_map = vec![NodeIndex::end(); self.node_count()]; - for (i, node) in enumerate(&self.nodes) { - if let Some(nw) = node_map(NodeIndex::new(i), &node.weight) { - node_index_map[i] = g.add_node(nw); - } - } - for (i, edge) in enumerate(&self.edges) { - // skip edge if any endpoint was removed - let source = node_index_map[edge.source().index()]; - let target = node_index_map[edge.target().index()]; - if source != NodeIndex::end() && target != NodeIndex::end() { - if let Some(ew) = edge_map(EdgeIndex::new(i), &edge.weight) { - g.add_edge(source, target, ew); - } - } - } - g - } - - /// Convert the graph into either undirected or directed. No edge adjustments - /// are done, so you may want to go over the result to remove or add edges. - /// - /// Computes in **O(1)** time. - pub fn into_edge_type<NewTy>(self) -> Graph<N, E, NewTy, Ix> - where - NewTy: EdgeType, - { - Graph { - nodes: self.nodes, - edges: self.edges, - ty: PhantomData, - } - } - - // - // internal methods - // - #[cfg(feature = "serde-1")] - /// Fix up node and edge links after deserialization - fn link_edges(&mut self) -> Result<(), NodeIndex<Ix>> { - for (edge_index, edge) in enumerate(&mut self.edges) { - let a = edge.source(); - let b = edge.target(); - let edge_idx = EdgeIndex::new(edge_index); - match index_twice(&mut self.nodes, a.index(), b.index()) { - Pair::None => return Err(if a > b { a } else { b }), - Pair::One(an) => { - edge.next = an.next; - an.next[0] = edge_idx; - an.next[1] = edge_idx; - } - Pair::Both(an, bn) => { - // a and b are different indices - edge.next = [an.next[0], bn.next[1]]; - an.next[0] = edge_idx; - bn.next[1] = edge_idx; - } - } - } - Ok(()) - } -} - -/// An iterator over either the nodes without edges to them or from them. -#[derive(Debug, Clone)] -pub struct Externals<'a, N: 'a, Ty, Ix: IndexType = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Node<N, Ix>>>, - dir: Direction, - ty: PhantomData<Ty>, -} - -impl<'a, N: 'a, Ty, Ix> Iterator for Externals<'a, N, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = NodeIndex<Ix>; - fn next(&mut self) -> Option<NodeIndex<Ix>> { - let k = self.dir.index(); - loop { - match self.iter.next() { - None => return None, - Some((index, node)) => { - if node.next[k] == EdgeIndex::end() - && (Ty::is_directed() || node.next[1 - k] == EdgeIndex::end()) - { - return Some(NodeIndex::new(index)); - } else { - continue; - } - } - } - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -/// Iterator over the neighbors of a node. -/// -/// Iterator element type is `NodeIndex<Ix>`. -/// -/// Created with [`.neighbors()`][1], [`.neighbors_directed()`][2] or -/// [`.neighbors_undirected()`][3]. -/// -/// [1]: struct.Graph.html#method.neighbors -/// [2]: struct.Graph.html#method.neighbors_directed -/// [3]: struct.Graph.html#method.neighbors_undirected -#[derive(Debug)] -pub struct Neighbors<'a, E: 'a, Ix: 'a = DefaultIx> { - /// starting node to skip over - skip_start: NodeIndex<Ix>, - edges: &'a [Edge<E, Ix>], - next: [EdgeIndex<Ix>; 2], -} - -impl<E, Ix> Iterator for Neighbors<'_, E, Ix> -where - Ix: IndexType, -{ - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<NodeIndex<Ix>> { - // First any outgoing edges - match self.edges.get(self.next[0].index()) { - None => {} - Some(edge) => { - self.next[0] = edge.next[0]; - return Some(edge.node[1]); - } - } - // Then incoming edges - // For an "undirected" iterator (traverse both incoming - // and outgoing edge lists), make sure we don't double - // count selfloops by skipping them in the incoming list. - while let Some(edge) = self.edges.get(self.next[1].index()) { - self.next[1] = edge.next[1]; - if edge.node[0] != self.skip_start { - return Some(edge.node[0]); - } - } - None - } -} - -impl<E, Ix> Clone for Neighbors<'_, E, Ix> -where - Ix: IndexType, -{ - clone_fields!(Neighbors, skip_start, edges, next,); -} - -impl<E, Ix> Neighbors<'_, E, Ix> -where - Ix: IndexType, -{ - /// Return a “walker” object that can be used to step through the - /// neighbors and edges from the origin node. - /// - /// Note: The walker does not borrow from the graph, this is to allow mixing - /// edge walking with mutating the graph's weights. - pub fn detach(&self) -> WalkNeighbors<Ix> { - WalkNeighbors { - skip_start: self.skip_start, - next: self.next, - } - } -} - -struct EdgesWalkerMut<'a, E: 'a, Ix: IndexType = DefaultIx> { - edges: &'a mut [Edge<E, Ix>], - next: EdgeIndex<Ix>, - dir: Direction, -} - -fn edges_walker_mut<E, Ix>( - edges: &mut [Edge<E, Ix>], - next: EdgeIndex<Ix>, - dir: Direction, -) -> EdgesWalkerMut<E, Ix> -where - Ix: IndexType, -{ - EdgesWalkerMut { edges, next, dir } -} - -impl<E, Ix> EdgesWalkerMut<'_, E, Ix> -where - Ix: IndexType, -{ - fn next_edge(&mut self) -> Option<&mut Edge<E, Ix>> { - self.next().map(|t| t.1) - } - - fn next(&mut self) -> Option<(EdgeIndex<Ix>, &mut Edge<E, Ix>)> { - let this_index = self.next; - let k = self.dir.index(); - match self.edges.get_mut(self.next.index()) { - None => None, - Some(edge) => { - self.next = edge.next[k]; - Some((this_index, edge)) - } - } - } -} - -impl<'a, N, E, Ty, Ix> visit::IntoEdges for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Edges = Edges<'a, E, Ty, Ix>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - self.edges(a) - } -} - -impl<'a, N, E, Ty, Ix> visit::IntoEdgesDirected for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgesDirected = Edges<'a, E, Ty, Ix>; - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::EdgesDirected { - self.edges_directed(a, dir) - } -} - -/// Iterator over the edges of from or to a node -#[derive(Debug)] -pub struct Edges<'a, E: 'a, Ty, Ix: 'a = DefaultIx> -where - Ty: EdgeType, - Ix: IndexType, -{ - /// starting node to skip over - skip_start: NodeIndex<Ix>, - edges: &'a [Edge<E, Ix>], - - /// Next edge to visit. - next: [EdgeIndex<Ix>; 2], - - /// For directed graphs: the direction to iterate in - /// For undirected graphs: the direction of edges - direction: Direction, - ty: PhantomData<Ty>, -} - -impl<'a, E, Ty, Ix> Iterator for Edges<'a, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ix>; - - fn next(&mut self) -> Option<Self::Item> { - // type direction | iterate over reverse - // | - // Directed Outgoing | outgoing no - // Directed Incoming | incoming no - // Undirected Outgoing | both incoming - // Undirected Incoming | both outgoing - - // For iterate_over, "both" is represented as None. - // For reverse, "no" is represented as None. - let (iterate_over, reverse) = if Ty::is_directed() { - (Some(self.direction), None) - } else { - (None, Some(self.direction.opposite())) - }; - - if iterate_over.unwrap_or(Outgoing) == Outgoing { - let i = self.next[0].index(); - if let Some(Edge { node, weight, next }) = self.edges.get(i) { - self.next[0] = next[0]; - return Some(EdgeReference { - index: edge_index(i), - node: if reverse == Some(Outgoing) { - swap_pair(*node) - } else { - *node - }, - weight, - }); - } - } - - if iterate_over.unwrap_or(Incoming) == Incoming { - while let Some(Edge { node, weight, next }) = self.edges.get(self.next[1].index()) { - let edge_index = self.next[1]; - self.next[1] = next[1]; - // In any of the "both" situations, self-loops would be iterated over twice. - // Skip them here. - if iterate_over.is_none() && node[0] == self.skip_start { - continue; - } - - return Some(EdgeReference { - index: edge_index, - node: if reverse == Some(Incoming) { - swap_pair(*node) - } else { - *node - }, - weight, - }); - } - } - - None - } -} - -/// Iterator over the multiple directed edges connecting a source node to a target node -#[derive(Debug, Clone)] -pub struct EdgesConnecting<'a, E: 'a, Ty, Ix: 'a = DefaultIx> -where - Ty: EdgeType, - Ix: IndexType, -{ - target_node: NodeIndex<Ix>, - edges: Edges<'a, E, Ty, Ix>, - ty: PhantomData<Ty>, -} - -impl<'a, E, Ty, Ix> Iterator for EdgesConnecting<'a, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ix>; - - fn next(&mut self) -> Option<EdgeReference<'a, E, Ix>> { - let target_node = self.target_node; - self.edges - .by_ref() - .find(|&edge| edge.node[1] == target_node) - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.edges.size_hint(); - (0, upper) - } -} - -fn swap_pair<T>(mut x: [T; 2]) -> [T; 2] { - x.swap(0, 1); - x -} - -impl<E, Ty, Ix> Clone for Edges<'_, E, Ty, Ix> -where - Ix: IndexType, - Ty: EdgeType, -{ - fn clone(&self) -> Self { - Edges { - skip_start: self.skip_start, - edges: self.edges, - next: self.next, - direction: self.direction, - ty: self.ty, - } - } -} - -/// Iterator yielding immutable access to all node weights. -pub struct NodeWeights<'a, N: 'a, Ix: IndexType = DefaultIx> { - nodes: ::std::slice::Iter<'a, Node<N, Ix>>, -} -impl<'a, N, Ix> Iterator for NodeWeights<'a, N, Ix> -where - Ix: IndexType, -{ - type Item = &'a N; - - fn next(&mut self) -> Option<&'a N> { - self.nodes.next().map(|node| &node.weight) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.nodes.size_hint() - } -} -/// Iterator yielding mutable access to all node weights. -#[derive(Debug)] -pub struct NodeWeightsMut<'a, N: 'a, Ix: IndexType = DefaultIx> { - nodes: ::std::slice::IterMut<'a, Node<N, Ix>>, // TODO: change type to something that implements Clone? -} - -impl<'a, N, Ix> Iterator for NodeWeightsMut<'a, N, Ix> -where - Ix: IndexType, -{ - type Item = &'a mut N; - - fn next(&mut self) -> Option<&'a mut N> { - self.nodes.next().map(|node| &mut node.weight) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.nodes.size_hint() - } -} - -/// Iterator yielding immutable access to all edge weights. -pub struct EdgeWeights<'a, E: 'a, Ix: IndexType = DefaultIx> { - edges: ::std::slice::Iter<'a, Edge<E, Ix>>, -} - -impl<'a, E, Ix> Iterator for EdgeWeights<'a, E, Ix> -where - Ix: IndexType, -{ - type Item = &'a E; - - fn next(&mut self) -> Option<&'a E> { - self.edges.next().map(|edge| &edge.weight) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.edges.size_hint() - } -} - -/// Iterator yielding mutable access to all edge weights. -#[derive(Debug)] -pub struct EdgeWeightsMut<'a, E: 'a, Ix: IndexType = DefaultIx> { - edges: ::std::slice::IterMut<'a, Edge<E, Ix>>, // TODO: change type to something that implements Clone? -} - -impl<'a, E, Ix> Iterator for EdgeWeightsMut<'a, E, Ix> -where - Ix: IndexType, -{ - type Item = &'a mut E; - - fn next(&mut self) -> Option<&'a mut E> { - self.edges.next().map(|edge| &mut edge.weight) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.edges.size_hint() - } -} - -/// Index the `Graph` by `NodeIndex` to access node weights. -/// -/// **Panics** if the node doesn't exist. -impl<N, E, Ty, Ix> Index<NodeIndex<Ix>> for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Output = N; - fn index(&self, index: NodeIndex<Ix>) -> &N { - &self.nodes[index.index()].weight - } -} - -/// Index the `Graph` by `NodeIndex` to access node weights. -/// -/// **Panics** if the node doesn't exist. -impl<N, E, Ty, Ix> IndexMut<NodeIndex<Ix>> for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn index_mut(&mut self, index: NodeIndex<Ix>) -> &mut N { - &mut self.nodes[index.index()].weight - } -} - -/// Index the `Graph` by `EdgeIndex` to access edge weights. -/// -/// **Panics** if the edge doesn't exist. -impl<N, E, Ty, Ix> Index<EdgeIndex<Ix>> for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Output = E; - fn index(&self, index: EdgeIndex<Ix>) -> &E { - &self.edges[index.index()].weight - } -} - -/// Index the `Graph` by `EdgeIndex` to access edge weights. -/// -/// **Panics** if the edge doesn't exist. -impl<N, E, Ty, Ix> IndexMut<EdgeIndex<Ix>> for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn index_mut(&mut self, index: EdgeIndex<Ix>) -> &mut E { - &mut self.edges[index.index()].weight - } -} - -/// Create a new empty `Graph`. -impl<N, E, Ty, Ix> Default for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn default() -> Self { - Self::with_capacity(0, 0) - } -} - -/// A `GraphIndex` is a node or edge index. -pub trait GraphIndex: Copy { - #[doc(hidden)] - fn index(&self) -> usize; - #[doc(hidden)] - fn is_node_index() -> bool; -} - -impl<Ix: IndexType> GraphIndex for NodeIndex<Ix> { - #[inline] - #[doc(hidden)] - fn index(&self) -> usize { - NodeIndex::index(*self) - } - #[inline] - #[doc(hidden)] - fn is_node_index() -> bool { - true - } -} - -impl<Ix: IndexType> GraphIndex for EdgeIndex<Ix> { - #[inline] - #[doc(hidden)] - fn index(&self) -> usize { - EdgeIndex::index(*self) - } - #[inline] - #[doc(hidden)] - fn is_node_index() -> bool { - false - } -} - -/// A “walker” object that can be used to step through the edge list of a node. -/// -/// Created with [`.detach()`](struct.Neighbors.html#method.detach). -/// -/// The walker does not borrow from the graph, so it lets you step through -/// neighbors or incident edges while also mutating graph weights, as -/// in the following example: -/// -/// ``` -/// use petgraph::{Graph, Incoming}; -/// use petgraph::visit::Dfs; -/// -/// let mut gr = Graph::new(); -/// let a = gr.add_node(0.); -/// let b = gr.add_node(0.); -/// let c = gr.add_node(0.); -/// gr.add_edge(a, b, 3.); -/// gr.add_edge(b, c, 2.); -/// gr.add_edge(c, b, 1.); -/// -/// // step through the graph and sum incoming edges into the node weight -/// let mut dfs = Dfs::new(&gr, a); -/// while let Some(node) = dfs.next(&gr) { -/// // use a detached neighbors walker -/// let mut edges = gr.neighbors_directed(node, Incoming).detach(); -/// while let Some(edge) = edges.next_edge(&gr) { -/// gr[node] += gr[edge]; -/// } -/// } -/// -/// // check the result -/// assert_eq!(gr[a], 0.); -/// assert_eq!(gr[b], 4.); -/// assert_eq!(gr[c], 2.); -/// ``` -pub struct WalkNeighbors<Ix> { - skip_start: NodeIndex<Ix>, - next: [EdgeIndex<Ix>; 2], -} - -impl<Ix> Clone for WalkNeighbors<Ix> -where - Ix: IndexType, -{ - fn clone(&self) -> Self { - WalkNeighbors { - skip_start: self.skip_start, - next: self.next, - } - } -} - -impl<Ix: IndexType> WalkNeighbors<Ix> { - /// Step to the next edge and its endpoint node in the walk for graph `g`. - /// - /// The next node indices are always the others than the starting point - /// where the `WalkNeighbors` value was created. - /// For an `Outgoing` walk, the target nodes, - /// for an `Incoming` walk, the source nodes of the edge. - pub fn next<N, E, Ty: EdgeType>( - &mut self, - g: &Graph<N, E, Ty, Ix>, - ) -> Option<(EdgeIndex<Ix>, NodeIndex<Ix>)> { - // First any outgoing edges - match g.edges.get(self.next[0].index()) { - None => {} - Some(edge) => { - let ed = self.next[0]; - self.next[0] = edge.next[0]; - return Some((ed, edge.node[1])); - } - } - // Then incoming edges - // For an "undirected" iterator (traverse both incoming - // and outgoing edge lists), make sure we don't double - // count selfloops by skipping them in the incoming list. - while let Some(edge) = g.edges.get(self.next[1].index()) { - let ed = self.next[1]; - self.next[1] = edge.next[1]; - if edge.node[0] != self.skip_start { - return Some((ed, edge.node[0])); - } - } - None - } - - pub fn next_node<N, E, Ty: EdgeType>( - &mut self, - g: &Graph<N, E, Ty, Ix>, - ) -> Option<NodeIndex<Ix>> { - self.next(g).map(|t| t.1) - } - - pub fn next_edge<N, E, Ty: EdgeType>( - &mut self, - g: &Graph<N, E, Ty, Ix>, - ) -> Option<EdgeIndex<Ix>> { - self.next(g).map(|t| t.0) - } -} - -/// Iterator over the node indices of a graph. -#[derive(Clone, Debug)] -pub struct NodeIndices<Ix = DefaultIx> { - r: Range<usize>, - ty: PhantomData<fn() -> Ix>, -} - -impl<Ix: IndexType> Iterator for NodeIndices<Ix> { - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.r.next().map(node_index) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.r.size_hint() - } -} - -impl<Ix: IndexType> DoubleEndedIterator for NodeIndices<Ix> { - fn next_back(&mut self) -> Option<Self::Item> { - self.r.next_back().map(node_index) - } -} - -impl<Ix: IndexType> ExactSizeIterator for NodeIndices<Ix> {} - -/// Iterator over the edge indices of a graph. -#[derive(Clone, Debug)] -pub struct EdgeIndices<Ix = DefaultIx> { - r: Range<usize>, - ty: PhantomData<fn() -> Ix>, -} - -impl<Ix: IndexType> Iterator for EdgeIndices<Ix> { - type Item = EdgeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.r.next().map(edge_index) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.r.size_hint() - } -} - -impl<Ix: IndexType> DoubleEndedIterator for EdgeIndices<Ix> { - fn next_back(&mut self) -> Option<Self::Item> { - self.r.next_back().map(edge_index) - } -} - -impl<Ix: IndexType> ExactSizeIterator for EdgeIndices<Ix> {} - -/// Reference to a `Graph` edge. -#[derive(Debug)] -pub struct EdgeReference<'a, E: 'a, Ix = DefaultIx> { - index: EdgeIndex<Ix>, - node: [NodeIndex<Ix>; 2], - weight: &'a E, -} - -impl<E, Ix: IndexType> Clone for EdgeReference<'_, E, Ix> { - fn clone(&self) -> Self { - *self - } -} - -impl<E, Ix: IndexType> Copy for EdgeReference<'_, E, Ix> {} - -impl<E, Ix: IndexType> PartialEq for EdgeReference<'_, E, Ix> -where - E: PartialEq, -{ - fn eq(&self, rhs: &Self) -> bool { - self.index == rhs.index && self.weight == rhs.weight - } -} - -impl<N, E, Ty, Ix> visit::GraphBase for Graph<N, E, Ty, Ix> -where - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex<Ix>; -} - -impl<N, E, Ty, Ix> visit::Visitable for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Map = FixedBitSet; - fn visit_map(&self) -> FixedBitSet { - FixedBitSet::with_capacity(self.node_count()) - } - - fn reset_map(&self, map: &mut Self::Map) { - map.clear(); - map.grow(self.node_count()); - } -} - -impl<N, E, Ty, Ix> visit::GraphProp for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgeType = Ty; -} - -impl<'a, N, E: 'a, Ty, Ix> visit::IntoNodeIdentifiers for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeIdentifiers = NodeIndices<Ix>; - fn node_identifiers(self) -> NodeIndices<Ix> { - Graph::node_indices(self) - } -} - -impl<N, E, Ty, Ix> visit::NodeCount for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_count(&self) -> usize { - self.node_count() - } -} - -impl<N, E, Ty, Ix> visit::NodeIndexable for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - #[inline] - fn node_bound(&self) -> usize { - self.node_count() - } - #[inline] - fn to_index(&self, ix: NodeIndex<Ix>) -> usize { - ix.index() - } - #[inline] - fn from_index(&self, ix: usize) -> Self::NodeId { - NodeIndex::new(ix) - } -} - -impl<N, E, Ty, Ix> visit::NodeCompactIndexable for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ -} - -impl<'a, N, E: 'a, Ty, Ix> visit::IntoNeighbors for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Neighbors = Neighbors<'a, E, Ix>; - fn neighbors(self, n: NodeIndex<Ix>) -> Neighbors<'a, E, Ix> { - Graph::neighbors(self, n) - } -} - -impl<'a, N, E: 'a, Ty, Ix> visit::IntoNeighborsDirected for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NeighborsDirected = Neighbors<'a, E, Ix>; - fn neighbors_directed(self, n: NodeIndex<Ix>, d: Direction) -> Neighbors<'a, E, Ix> { - Graph::neighbors_directed(self, n, d) - } -} - -impl<'a, N: 'a, E: 'a, Ty, Ix> visit::IntoEdgeReferences for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgeRef = EdgeReference<'a, E, Ix>; - type EdgeReferences = EdgeReferences<'a, E, Ix>; - fn edge_references(self) -> Self::EdgeReferences { - (*self).edge_references() - } -} - -impl<N, E, Ty, Ix> visit::EdgeCount for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - #[inline] - fn edge_count(&self) -> usize { - self.edge_count() - } -} - -impl<'a, N, E, Ty, Ix> visit::IntoNodeReferences for &'a Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeRef = (NodeIndex<Ix>, &'a N); - type NodeReferences = NodeReferences<'a, N, Ix>; - fn node_references(self) -> Self::NodeReferences { - NodeReferences { - iter: self.nodes.iter().enumerate(), - } - } -} - -/// Iterator over all nodes of a graph. -#[derive(Debug, Clone)] -pub struct NodeReferences<'a, N: 'a, Ix: IndexType = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Node<N, Ix>>>, -} - -impl<'a, N, Ix> Iterator for NodeReferences<'a, N, Ix> -where - Ix: IndexType, -{ - type Item = (NodeIndex<Ix>, &'a N); - - fn next(&mut self) -> Option<Self::Item> { - self.iter - .next() - .map(|(i, node)| (node_index(i), &node.weight)) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -impl<N, Ix> DoubleEndedIterator for NodeReferences<'_, N, Ix> -where - Ix: IndexType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.iter - .next_back() - .map(|(i, node)| (node_index(i), &node.weight)) - } -} - -impl<N, Ix> ExactSizeIterator for NodeReferences<'_, N, Ix> where Ix: IndexType {} - -impl<'a, Ix, E> EdgeReference<'a, E, Ix> -where - Ix: IndexType, -{ - /// Access the edge’s weight. - /// - /// **NOTE** that this method offers a longer lifetime - /// than the trait (unfortunately they don't match yet). - pub fn weight(&self) -> &'a E { - self.weight - } -} - -impl<Ix, E> visit::EdgeRef for EdgeReference<'_, E, Ix> -where - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex<Ix>; - type Weight = E; - - fn source(&self) -> Self::NodeId { - self.node[0] - } - fn target(&self) -> Self::NodeId { - self.node[1] - } - fn weight(&self) -> &E { - self.weight - } - fn id(&self) -> Self::EdgeId { - self.index - } -} - -/// Iterator over all edges of a graph. -#[derive(Debug, Clone)] -pub struct EdgeReferences<'a, E: 'a, Ix: IndexType = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Edge<E, Ix>>>, -} - -impl<'a, E, Ix> Iterator for EdgeReferences<'a, E, Ix> -where - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(|(i, edge)| EdgeReference { - index: edge_index(i), - node: edge.node, - weight: &edge.weight, - }) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -impl<E, Ix> DoubleEndedIterator for EdgeReferences<'_, E, Ix> -where - Ix: IndexType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.iter.next_back().map(|(i, edge)| EdgeReference { - index: edge_index(i), - node: edge.node, - weight: &edge.weight, - }) - } -} - -impl<E, Ix> ExactSizeIterator for EdgeReferences<'_, E, Ix> where Ix: IndexType {} - -impl<N, E, Ty, Ix> visit::EdgeIndexable for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn edge_bound(&self) -> usize { - self.edge_count() - } - - fn to_index(&self, ix: EdgeIndex<Ix>) -> usize { - ix.index() - } - - fn from_index(&self, ix: usize) -> Self::EdgeId { - EdgeIndex::new(ix) - } -} - -mod frozen; -#[cfg(feature = "stable_graph")] -pub mod stable_graph; - -/// `Frozen` is a graph wrapper. -/// -/// The `Frozen` only allows shared access (read-only) to the -/// underlying graph `G`, but it allows mutable access to its -/// node and edge weights. -/// -/// This is used to ensure immutability of the graph's structure -/// while permitting weights to be both read and written. -/// -/// See indexing implementations and the traits `Data` and `DataMap` -/// for read-write access to the graph's weights. -pub struct Frozen<'a, G: 'a>(&'a mut G); diff --git a/vendor/petgraph/src/graph_impl/serialization.rs b/vendor/petgraph/src/graph_impl/serialization.rs deleted file mode 100644 index d53c9de4..00000000 --- a/vendor/petgraph/src/graph_impl/serialization.rs +++ /dev/null @@ -1,355 +0,0 @@ -use serde::de::Error; - -use std::marker::PhantomData; - -use crate::prelude::*; - -use crate::graph::Node; -use crate::graph::{Edge, IndexType}; -use crate::serde_utils::CollectSeqWithLength; -use crate::serde_utils::MappedSequenceVisitor; -use crate::serde_utils::{FromDeserialized, IntoSerializable}; -use crate::EdgeType; - -use super::{EdgeIndex, NodeIndex}; -use serde::{Deserialize, Deserializer, Serialize, Serializer}; - -/// Serialization representation for Graph -/// Keep in sync with deserialization and StableGraph -/// -/// The serialization format is as follows, in Pseudorust: -/// -/// Graph { -/// nodes: [N], -/// node_holes: [NodeIndex<Ix>], -/// edge_property: EdgeProperty, -/// edges: [Option<(NodeIndex<Ix>, NodeIndex<Ix>, E)>] -/// } -/// -/// The same format is used by both Graph and StableGraph. -/// -/// For graph there are restrictions: -/// node_holes is always empty and edges are always Some -/// -/// A stable graph serialization that obeys these restrictions -/// (effectively, it has no interior vacancies) can de deserialized -/// as a graph. -/// -/// Node indices are serialized as integers and are fixed size for -/// binary formats, so the Ix parameter matters there. -#[derive(Serialize)] -#[serde(rename = "Graph")] -#[serde(bound(serialize = "N: Serialize, E: Serialize, Ix: IndexType + Serialize"))] -pub struct SerGraph<'a, N: 'a, E: 'a, Ix: 'a + IndexType> { - #[serde(serialize_with = "ser_graph_nodes")] - nodes: &'a [Node<N, Ix>], - node_holes: &'a [NodeIndex<Ix>], - edge_property: EdgeProperty, - #[serde(serialize_with = "ser_graph_edges")] - edges: &'a [Edge<E, Ix>], -} - -// Deserialization representation for Graph -// Keep in sync with serialization and StableGraph -#[derive(Deserialize)] -#[serde(rename = "Graph")] -#[serde(bound( - deserialize = "N: Deserialize<'de>, E: Deserialize<'de>, Ix: IndexType + Deserialize<'de>" -))] -pub struct DeserGraph<N, E, Ix> { - #[serde(deserialize_with = "deser_graph_nodes")] - nodes: Vec<Node<N, Ix>>, - #[serde(deserialize_with = "deser_graph_node_holes")] - #[allow(unused)] - #[serde(default = "Vec::new")] - node_holes: Vec<NodeIndex<Ix>>, - edge_property: EdgeProperty, - #[serde(deserialize_with = "deser_graph_edges")] - edges: Vec<Edge<E, Ix>>, -} - -impl<Ix> Serialize for NodeIndex<Ix> -where - Ix: IndexType + Serialize, -{ - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - self.0.serialize(serializer) - } -} - -impl<'de, Ix> Deserialize<'de> for NodeIndex<Ix> -where - Ix: IndexType + Deserialize<'de>, -{ - fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> - where - D: Deserializer<'de>, - { - Ok(NodeIndex(Ix::deserialize(deserializer)?)) - } -} - -impl<Ix> Serialize for EdgeIndex<Ix> -where - Ix: IndexType + Serialize, -{ - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - self.0.serialize(serializer) - } -} - -impl<'de, Ix> Deserialize<'de> for EdgeIndex<Ix> -where - Ix: IndexType + Deserialize<'de>, -{ - fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> - where - D: Deserializer<'de>, - { - Ok(EdgeIndex(Ix::deserialize(deserializer)?)) - } -} - -#[derive(Serialize, Deserialize)] -#[serde(rename_all = "lowercase")] -#[derive(Debug)] -pub enum EdgeProperty { - Undirected, - Directed, -} - -impl EdgeProperty { - pub fn is_directed(&self) -> bool { - match *self { - EdgeProperty::Directed => true, - EdgeProperty::Undirected => false, - } - } -} - -impl<Ty> From<PhantomData<Ty>> for EdgeProperty -where - Ty: EdgeType, -{ - fn from(_: PhantomData<Ty>) -> Self { - if Ty::is_directed() { - EdgeProperty::Directed - } else { - EdgeProperty::Undirected - } - } -} - -impl<Ty> FromDeserialized for PhantomData<Ty> -where - Ty: EdgeType, -{ - type Input = EdgeProperty; - fn from_deserialized<E2>(input: Self::Input) -> Result<Self, E2> - where - E2: Error, - { - if input.is_directed() != Ty::is_directed() { - Err(E2::custom(format_args!( - "graph edge property mismatch, \ - expected {:?}, found {:?}", - EdgeProperty::from(PhantomData::<Ty>), - input - ))) - } else { - Ok(PhantomData) - } - } -} - -fn ser_graph_nodes<S, N, Ix>(nodes: &&[Node<N, Ix>], serializer: S) -> Result<S::Ok, S::Error> -where - S: Serializer, - N: Serialize, - Ix: Serialize + IndexType, -{ - serializer.collect_seq_exact(nodes.iter().map(|node| &node.weight)) -} - -fn ser_graph_edges<S, E, Ix>(edges: &&[Edge<E, Ix>], serializer: S) -> Result<S::Ok, S::Error> -where - S: Serializer, - E: Serialize, - Ix: Serialize + IndexType, -{ - serializer.collect_seq_exact( - edges - .iter() - .map(|edge| Some((edge.source(), edge.target(), &edge.weight))), - ) -} - -fn deser_graph_nodes<'de, D, N, Ix>(deserializer: D) -> Result<Vec<Node<N, Ix>>, D::Error> -where - D: Deserializer<'de>, - N: Deserialize<'de>, - Ix: IndexType + Deserialize<'de>, -{ - deserializer.deserialize_seq(MappedSequenceVisitor::new(|n| { - Ok(Node { - weight: n, - next: [EdgeIndex::end(); 2], - }) - })) -} - -fn deser_graph_node_holes<'de, D, Ix>(deserializer: D) -> Result<Vec<NodeIndex<Ix>>, D::Error> -where - D: Deserializer<'de>, - Ix: IndexType + Deserialize<'de>, -{ - deserializer.deserialize_seq( - MappedSequenceVisitor::<NodeIndex<Ix>, NodeIndex<Ix>, _>::new(|_| { - Err("Graph can not have holes in the node set, found non-empty node_holes") - }), - ) -} - -fn deser_graph_edges<'de, D, N, Ix>(deserializer: D) -> Result<Vec<Edge<N, Ix>>, D::Error> -where - D: Deserializer<'de>, - N: Deserialize<'de>, - Ix: IndexType + Deserialize<'de>, -{ - deserializer.deserialize_seq(MappedSequenceVisitor::< - Option<(NodeIndex<Ix>, NodeIndex<Ix>, N)>, - _, - _, - >::new(|x| { - if let Some((i, j, w)) = x { - Ok(Edge { - weight: w, - node: [i, j], - next: [EdgeIndex::end(); 2], - }) - } else { - Err("Graph can not have holes in the edge set, found None, expected edge") - } - })) -} - -impl<'a, N, E, Ty, Ix> IntoSerializable for &'a Graph<N, E, Ty, Ix> -where - Ix: IndexType, - Ty: EdgeType, -{ - type Output = SerGraph<'a, N, E, Ix>; - fn into_serializable(self) -> Self::Output { - SerGraph { - nodes: &self.nodes, - node_holes: &[], - edges: &self.edges, - edge_property: EdgeProperty::from(PhantomData::<Ty>), - } - } -} - -/// Requires crate feature `"serde-1"` -impl<N, E, Ty, Ix> Serialize for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType + Serialize, - N: Serialize, - E: Serialize, -{ - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - self.into_serializable().serialize(serializer) - } -} - -pub fn invalid_node_err<E>(node_index: usize, len: usize) -> E -where - E: Error, -{ - E::custom(format_args!( - "invalid value: node index `{}` does not exist in graph \ - with node bound {}", - node_index, len - )) -} - -pub fn invalid_hole_err<E>(node_index: usize) -> E -where - E: Error, -{ - E::custom(format_args!( - "invalid value: node hole `{}` is not allowed.", - node_index - )) -} - -pub fn invalid_length_err<Ix, E>(node_or_edge: &str, len: usize) -> E -where - E: Error, - Ix: IndexType, -{ - E::custom(format_args!( - "invalid size: graph {} count {} exceeds index type maximum {}", - node_or_edge, - len, - <Ix as IndexType>::max().index() - )) -} - -impl<'a, N, E, Ty, Ix> FromDeserialized for Graph<N, E, Ty, Ix> -where - Ix: IndexType, - Ty: EdgeType, -{ - type Input = DeserGraph<N, E, Ix>; - fn from_deserialized<E2>(input: Self::Input) -> Result<Self, E2> - where - E2: Error, - { - let ty = PhantomData::<Ty>::from_deserialized(input.edge_property)?; - let nodes = input.nodes; - let edges = input.edges; - if nodes.len() >= <Ix as IndexType>::max().index() { - Err(invalid_length_err::<Ix, _>("node", nodes.len()))? - } - - if edges.len() >= <Ix as IndexType>::max().index() { - Err(invalid_length_err::<Ix, _>("edge", edges.len()))? - } - - let mut gr = Graph { - nodes: nodes, - edges: edges, - ty: ty, - }; - let nc = gr.node_count(); - gr.link_edges() - .map_err(|i| invalid_node_err(i.index(), nc))?; - Ok(gr) - } -} - -/// Requires crate feature `"serde-1"` -impl<'de, N, E, Ty, Ix> Deserialize<'de> for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType + Deserialize<'de>, - N: Deserialize<'de>, - E: Deserialize<'de>, -{ - fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> - where - D: Deserializer<'de>, - { - Self::from_deserialized(DeserGraph::deserialize(deserializer)?) - } -} diff --git a/vendor/petgraph/src/graph_impl/stable_graph/mod.rs b/vendor/petgraph/src/graph_impl/stable_graph/mod.rs deleted file mode 100644 index bf03b62d..00000000 --- a/vendor/petgraph/src/graph_impl/stable_graph/mod.rs +++ /dev/null @@ -1,2103 +0,0 @@ -//! `StableGraph` keeps indices stable across removals. -//! -//! Depends on `feature = "stable_graph"`. -//! - -use std::cmp; -use std::fmt; -use std::iter; -use std::marker::PhantomData; -use std::mem::replace; -use std::mem::size_of; -use std::ops::{Index, IndexMut}; -use std::slice; - -use fixedbitset::FixedBitSet; - -use crate::{Directed, Direction, EdgeType, Graph, Incoming, Outgoing, Undirected}; - -use crate::iter_format::{DebugMap, IterFormatExt, NoPretty}; -use crate::iter_utils::IterUtilsExt; - -use super::{index_twice, Edge, Frozen, Node, Pair, DIRECTIONS}; -use crate::visit; -use crate::visit::{EdgeIndexable, EdgeRef, IntoEdgeReferences, NodeIndexable}; -use crate::IntoWeightedEdge; - -// reexport those things that are shared with Graph -#[doc(no_inline)] -pub use crate::graph::{ - edge_index, node_index, DefaultIx, EdgeIndex, GraphIndex, IndexType, NodeIndex, -}; - -use crate::util::enumerate; - -#[cfg(feature = "serde-1")] -mod serialization; - -/// `StableGraph<N, E, Ty, Ix>` is a graph datastructure using an adjacency -/// list representation. -/// -/// The graph **does not invalidate** any unrelated node or edge indices when -/// items are removed. -/// -/// `StableGraph` is parameterized over: -/// -/// - Associated data `N` for nodes and `E` for edges, also called *weights*. -/// The associated data can be of arbitrary type. -/// - Edge type `Ty` that determines whether the graph edges are directed or undirected. -/// - Index type `Ix`, which determines the maximum size of the graph. -/// -/// The graph uses **O(|V| + |E|)** space, and allows fast node and edge insert -/// and efficient graph search. -/// -/// It implements **O(e')** edge lookup and edge and node removals, where **e'** -/// is some local measure of edge count. -/// -/// - Nodes and edges are each numbered in an interval from *0* to some number -/// *m*, but *not all* indices in the range are valid, since gaps are formed -/// by deletions. -/// -/// - You can select graph index integer type after the size of the graph. A smaller -/// size may have better performance. -/// -/// - Using indices allows mutation while traversing the graph, see `Dfs`. -/// -/// - The `StableGraph` is a regular rust collection and is `Send` and `Sync` -/// (as long as associated data `N` and `E` are). -/// -/// - Indices don't allow as much compile time checking as references. -/// -/// Depends on crate feature `stable_graph` (default). *Stable Graph is still -/// missing a few methods compared to Graph. You can contribute to help it -/// achieve parity.* -pub struct StableGraph<N, E, Ty = Directed, Ix = DefaultIx> { - g: Graph<Option<N>, Option<E>, Ty, Ix>, - node_count: usize, - edge_count: usize, - - // node and edge free lists (both work the same way) - // - // free_node, if not NodeIndex::end(), points to a node index - // that is vacant (after a deletion). - // The free nodes form a doubly linked list using the fields Node.next[0] - // for forward references and Node.next[1] for backwards ones. - // The nodes are stored as EdgeIndex, and the _into_edge()/_into_node() - // methods convert. - // free_edge, if not EdgeIndex::end(), points to a free edge. - // The edges only form a singly linked list using Edge.next[0] to store - // the forward reference. - free_node: NodeIndex<Ix>, - free_edge: EdgeIndex<Ix>, -} - -/// A `StableGraph` with directed edges. -/// -/// For example, an edge from *1* to *2* is distinct from an edge from *2* to -/// *1*. -pub type StableDiGraph<N, E, Ix = DefaultIx> = StableGraph<N, E, Directed, Ix>; - -/// A `StableGraph` with undirected edges. -/// -/// For example, an edge between *1* and *2* is equivalent to an edge between -/// *2* and *1*. -pub type StableUnGraph<N, E, Ix = DefaultIx> = StableGraph<N, E, Undirected, Ix>; - -impl<N, E, Ty, Ix> fmt::Debug for StableGraph<N, E, Ty, Ix> -where - N: fmt::Debug, - E: fmt::Debug, - Ty: EdgeType, - Ix: IndexType, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - let etype = if self.is_directed() { - "Directed" - } else { - "Undirected" - }; - let mut fmt_struct = f.debug_struct("StableGraph"); - fmt_struct.field("Ty", &etype); - fmt_struct.field("node_count", &self.node_count); - fmt_struct.field("edge_count", &self.edge_count); - if self.g.edges.iter().any(|e| e.weight.is_some()) { - fmt_struct.field( - "edges", - &self - .g - .edges - .iter() - .filter(|e| e.weight.is_some()) - .map(|e| NoPretty((e.source().index(), e.target().index()))) - .format(", "), - ); - } - // skip weights if they are ZST! - if size_of::<N>() != 0 { - fmt_struct.field( - "node weights", - &DebugMap(|| { - self.g - .nodes - .iter() - .map(|n| n.weight.as_ref()) - .enumerate() - .filter_map(|(i, wo)| wo.map(move |w| (i, w))) - }), - ); - } - if size_of::<E>() != 0 { - fmt_struct.field( - "edge weights", - &DebugMap(|| { - self.g - .edges - .iter() - .map(|n| n.weight.as_ref()) - .enumerate() - .filter_map(|(i, wo)| wo.map(move |w| (i, w))) - }), - ); - } - fmt_struct.field("free_node", &self.free_node); - fmt_struct.field("free_edge", &self.free_edge); - fmt_struct.finish() - } -} - -impl<N, E> StableGraph<N, E, Directed> { - /// Create a new `StableGraph` with directed edges. - /// - /// This is a convenience method. See `StableGraph::with_capacity` - /// or `StableGraph::default` for a constructor that is generic in all the - /// type parameters of `StableGraph`. - pub fn new() -> Self { - Self::with_capacity(0, 0) - } -} - -impl<N, E, Ty, Ix> StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - /// Create a new `StableGraph` with estimated capacity. - pub fn with_capacity(nodes: usize, edges: usize) -> Self { - StableGraph { - g: Graph::with_capacity(nodes, edges), - node_count: 0, - edge_count: 0, - free_node: NodeIndex::end(), - free_edge: EdgeIndex::end(), - } - } - - /// Return the current node and edge capacity of the graph. - pub fn capacity(&self) -> (usize, usize) { - self.g.capacity() - } - - /// Reverse the direction of all edges - pub fn reverse(&mut self) { - // swap edge endpoints, - // edge incoming / outgoing lists, - // node incoming / outgoing lists - for edge in &mut self.g.edges { - edge.node.swap(0, 1); - edge.next.swap(0, 1); - } - for node in &mut self.g.nodes { - node.next.swap(0, 1); - } - } - - /// Remove all nodes and edges - pub fn clear(&mut self) { - self.node_count = 0; - self.edge_count = 0; - self.free_node = NodeIndex::end(); - self.free_edge = EdgeIndex::end(); - self.g.clear(); - } - - /// Remove all edges - pub fn clear_edges(&mut self) { - self.edge_count = 0; - self.free_edge = EdgeIndex::end(); - self.g.edges.clear(); - // clear edges without touching the free list - for node in &mut self.g.nodes { - if node.weight.is_some() { - node.next = [EdgeIndex::end(), EdgeIndex::end()]; - } - } - } - - /// Return the number of nodes (vertices) in the graph. - /// - /// Computes in **O(1)** time. - pub fn node_count(&self) -> usize { - self.node_count - } - - /// Return the number of edges in the graph. - /// - /// Computes in **O(1)** time. - pub fn edge_count(&self) -> usize { - self.edge_count - } - - /// Whether the graph has directed edges or not. - #[inline] - pub fn is_directed(&self) -> bool { - Ty::is_directed() - } - - /// Add a node (also called vertex) with associated data `weight` to the graph. - /// - /// Computes in **O(1)** time. - /// - /// Return the index of the new node. - /// - /// **Panics** if the `StableGraph` is at the maximum number of nodes for - /// its index type. - pub fn add_node(&mut self, weight: N) -> NodeIndex<Ix> { - if self.free_node != NodeIndex::end() { - let node_idx = self.free_node; - self.occupy_vacant_node(node_idx, weight); - node_idx - } else { - self.node_count += 1; - self.g.add_node(Some(weight)) - } - } - - /// free_node: Which free list to update for the vacancy - fn add_vacant_node(&mut self, free_node: &mut NodeIndex<Ix>) { - let node_idx = self.g.add_node(None); - // link the free list - let node_slot = &mut self.g.nodes[node_idx.index()]; - node_slot.next = [free_node._into_edge(), EdgeIndex::end()]; - if *free_node != NodeIndex::end() { - self.g.nodes[free_node.index()].next[1] = node_idx._into_edge(); - } - *free_node = node_idx; - } - - /// Remove `a` from the graph if it exists, and return its weight. - /// If it doesn't exist in the graph, return `None`. - /// - /// The node index `a` is invalidated, but none other. - /// Edge indices are invalidated as they would be following the removal of - /// each edge with an endpoint in `a`. - /// - /// Computes in **O(e')** time, where **e'** is the number of affected - /// edges, including *n* calls to `.remove_edge()` where *n* is the number - /// of edges with an endpoint in `a`. - pub fn remove_node(&mut self, a: NodeIndex<Ix>) -> Option<N> { - let node_weight = self.g.nodes.get_mut(a.index())?.weight.take()?; - for d in &DIRECTIONS { - let k = d.index(); - - // Remove all edges from and to this node. - loop { - let next = self.g.nodes[a.index()].next[k]; - if next == EdgeIndex::end() { - break; - } - let ret = self.remove_edge(next); - debug_assert!(ret.is_some()); - let _ = ret; - } - } - - let node_slot = &mut self.g.nodes[a.index()]; - //let node_weight = replace(&mut self.g.nodes[a.index()].weight, Entry::Empty(self.free_node)); - //self.g.nodes[a.index()].next = [EdgeIndex::end(), EdgeIndex::end()]; - node_slot.next = [self.free_node._into_edge(), EdgeIndex::end()]; - if self.free_node != NodeIndex::end() { - self.g.nodes[self.free_node.index()].next[1] = a._into_edge(); - } - self.free_node = a; - self.node_count -= 1; - - Some(node_weight) - } - - pub fn contains_node(&self, a: NodeIndex<Ix>) -> bool { - self.get_node(a).is_some() - } - - // Return the Node if it is not vacant (non-None weight) - fn get_node(&self, a: NodeIndex<Ix>) -> Option<&Node<Option<N>, Ix>> { - self.g - .nodes - .get(a.index()) - .and_then(|node| node.weight.as_ref().map(move |_| node)) - } - - /// Add an edge from `a` to `b` to the graph, with its associated - /// data `weight`. - /// - /// Return the index of the new edge. - /// - /// Computes in **O(1)** time. - /// - /// **Panics** if any of the nodes don't exist.<br> - /// **Panics** if the `StableGraph` is at the maximum number of edges for - /// its index type. - /// - /// **Note:** `StableGraph` allows adding parallel (“duplicate”) edges. - pub fn add_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> EdgeIndex<Ix> { - let edge_idx; - let mut new_edge = None::<Edge<_, _>>; - { - let edge: &mut Edge<_, _>; - - if self.free_edge != EdgeIndex::end() { - edge_idx = self.free_edge; - edge = &mut self.g.edges[edge_idx.index()]; - let _old = replace(&mut edge.weight, Some(weight)); - debug_assert!(_old.is_none()); - self.free_edge = edge.next[0]; - edge.node = [a, b]; - } else { - edge_idx = EdgeIndex::new(self.g.edges.len()); - assert!(<Ix as IndexType>::max().index() == !0 || EdgeIndex::end() != edge_idx); - new_edge = Some(Edge { - weight: Some(weight), - node: [a, b], - next: [EdgeIndex::end(); 2], - }); - edge = new_edge.as_mut().unwrap(); - } - - let wrong_index = match index_twice(&mut self.g.nodes, a.index(), b.index()) { - Pair::None => Some(cmp::max(a.index(), b.index())), - Pair::One(an) => { - if an.weight.is_none() { - Some(a.index()) - } else { - edge.next = an.next; - an.next[0] = edge_idx; - an.next[1] = edge_idx; - None - } - } - Pair::Both(an, bn) => { - // a and b are different indices - if an.weight.is_none() { - Some(a.index()) - } else if bn.weight.is_none() { - Some(b.index()) - } else { - edge.next = [an.next[0], bn.next[1]]; - an.next[0] = edge_idx; - bn.next[1] = edge_idx; - None - } - } - }; - if let Some(i) = wrong_index { - panic!( - "StableGraph::add_edge: node index {} is not a node in the graph", - i - ); - } - self.edge_count += 1; - } - if let Some(edge) = new_edge { - self.g.edges.push(edge); - } - edge_idx - } - - /// free_edge: Which free list to update for the vacancy - fn add_vacant_edge(&mut self, free_edge: &mut EdgeIndex<Ix>) { - let edge_idx = EdgeIndex::new(self.g.edges.len()); - debug_assert!(edge_idx != EdgeIndex::end()); - let mut edge = Edge { - weight: None, - node: [NodeIndex::end(); 2], - next: [EdgeIndex::end(); 2], - }; - edge.next[0] = *free_edge; - *free_edge = edge_idx; - self.g.edges.push(edge); - } - - /// Add or update an edge from `a` to `b`. - /// If the edge already exists, its weight is updated. - /// - /// Return the index of the affected edge. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to `a` (and `b`, if the graph edges are undirected). - /// - /// **Panics** if any of the nodes don't exist. - pub fn update_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> EdgeIndex<Ix> { - if let Some(ix) = self.find_edge(a, b) { - self[ix] = weight; - return ix; - } - self.add_edge(a, b, weight) - } - - /// Remove an edge and return its edge weight, or `None` if it didn't exist. - /// - /// Invalidates the edge index `e` but no other. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to the same endpoints as `e`. - pub fn remove_edge(&mut self, e: EdgeIndex<Ix>) -> Option<E> { - // every edge is part of two lists, - // outgoing and incoming edges. - // Remove it from both - let (is_edge, edge_node, edge_next) = match self.g.edges.get(e.index()) { - None => return None, - Some(x) => (x.weight.is_some(), x.node, x.next), - }; - if !is_edge { - return None; - } - - // Remove the edge from its in and out lists by replacing it with - // a link to the next in the list. - self.g.change_edge_links(edge_node, e, edge_next); - - // Clear the edge and put it in the free list - let edge = &mut self.g.edges[e.index()]; - edge.next = [self.free_edge, EdgeIndex::end()]; - edge.node = [NodeIndex::end(), NodeIndex::end()]; - self.free_edge = e; - self.edge_count -= 1; - edge.weight.take() - } - - /// Access the weight for node `a`. - /// - /// Also available with indexing syntax: `&graph[a]`. - pub fn node_weight(&self, a: NodeIndex<Ix>) -> Option<&N> { - match self.g.nodes.get(a.index()) { - Some(no) => no.weight.as_ref(), - None => None, - } - } - - /// Access the weight for node `a`, mutably. - /// - /// Also available with indexing syntax: `&mut graph[a]`. - pub fn node_weight_mut(&mut self, a: NodeIndex<Ix>) -> Option<&mut N> { - match self.g.nodes.get_mut(a.index()) { - Some(no) => no.weight.as_mut(), - None => None, - } - } - - /// Return an iterator yielding immutable access to all node weights. - /// - /// The order in which weights are yielded matches the order of their node - /// indices. - pub fn node_weights(&self) -> impl Iterator<Item = &N> { - self.g - .node_weights() - .filter_map(|maybe_node| maybe_node.as_ref()) - } - /// Return an iterator yielding mutable access to all node weights. - /// - /// The order in which weights are yielded matches the order of their node - /// indices. - pub fn node_weights_mut(&mut self) -> impl Iterator<Item = &mut N> { - self.g - .node_weights_mut() - .filter_map(|maybe_node| maybe_node.as_mut()) - } - - /// Return an iterator over the node indices of the graph - pub fn node_indices(&self) -> NodeIndices<N, Ix> { - NodeIndices { - iter: enumerate(self.raw_nodes()), - } - } - - /// Access the weight for edge `e`. - /// - /// Also available with indexing syntax: `&graph[e]`. - pub fn edge_weight(&self, e: EdgeIndex<Ix>) -> Option<&E> { - match self.g.edges.get(e.index()) { - Some(ed) => ed.weight.as_ref(), - None => None, - } - } - - /// Access the weight for edge `e`, mutably - /// - /// Also available with indexing syntax: `&mut graph[e]`. - pub fn edge_weight_mut(&mut self, e: EdgeIndex<Ix>) -> Option<&mut E> { - match self.g.edges.get_mut(e.index()) { - Some(ed) => ed.weight.as_mut(), - None => None, - } - } - - /// Return an iterator yielding immutable access to all edge weights. - /// - /// The order in which weights are yielded matches the order of their edge - /// indices. - pub fn edge_weights(&self) -> impl Iterator<Item = &E> { - self.g - .edge_weights() - .filter_map(|maybe_edge| maybe_edge.as_ref()) - } - /// Return an iterator yielding mutable access to all edge weights. - /// - /// The order in which weights are yielded matches the order of their edge - /// indices. - pub fn edge_weights_mut(&mut self) -> impl Iterator<Item = &mut E> { - self.g - .edge_weights_mut() - .filter_map(|maybe_edge| maybe_edge.as_mut()) - } - - /// Access the source and target nodes for `e`. - pub fn edge_endpoints(&self, e: EdgeIndex<Ix>) -> Option<(NodeIndex<Ix>, NodeIndex<Ix>)> { - match self.g.edges.get(e.index()) { - Some(ed) if ed.weight.is_some() => Some((ed.source(), ed.target())), - _otherwise => None, - } - } - - /// Return an iterator over the edge indices of the graph - pub fn edge_indices(&self) -> EdgeIndices<E, Ix> { - EdgeIndices { - iter: enumerate(self.raw_edges()), - } - } - - /// Return an iterator over all the edges connecting `a` and `b`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edges_connecting( - &self, - a: NodeIndex<Ix>, - b: NodeIndex<Ix>, - ) -> EdgesConnecting<E, Ty, Ix> { - EdgesConnecting { - target_node: b, - edges: self.edges_directed(a, Direction::Outgoing), - ty: PhantomData, - } - } - - /// Lookup if there is an edge from `a` to `b`. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to `a` (and `b`, if the graph edges are undirected). - pub fn contains_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - self.find_edge(a, b).is_some() - } - - /// Lookup an edge from `a` to `b`. - /// - /// Computes in **O(e')** time, where **e'** is the number of edges - /// connected to `a` (and `b`, if the graph edges are undirected). - pub fn find_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> Option<EdgeIndex<Ix>> { - if !self.is_directed() { - self.find_edge_undirected(a, b).map(|(ix, _)| ix) - } else { - match self.get_node(a) { - None => None, - Some(node) => self.g.find_edge_directed_from_node(node, b), - } - } - } - - /// Lookup an edge between `a` and `b`, in either direction. - /// - /// If the graph is undirected, then this is equivalent to `.find_edge()`. - /// - /// Return the edge index and its directionality, with `Outgoing` meaning - /// from `a` to `b` and `Incoming` the reverse, - /// or `None` if the edge does not exist. - pub fn find_edge_undirected( - &self, - a: NodeIndex<Ix>, - b: NodeIndex<Ix>, - ) -> Option<(EdgeIndex<Ix>, Direction)> { - match self.get_node(a) { - None => None, - Some(node) => self.g.find_edge_undirected_from_node(node, b), - } - } - - /// Return an iterator of all nodes with an edge starting from `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - /// - /// Use [`.neighbors(a).detach()`][1] to get a neighbor walker that does - /// not borrow from the graph. - /// - /// [1]: struct.Neighbors.html#method.detach - pub fn neighbors(&self, a: NodeIndex<Ix>) -> Neighbors<E, Ix> { - self.neighbors_directed(a, Outgoing) - } - - /// Return an iterator of all neighbors that have an edge between them and `a`, - /// in the specified direction. - /// If the graph's edges are undirected, this is equivalent to *.neighbors(a)*. - /// - /// - `Directed`, `Outgoing`: All edges from `a`. - /// - `Directed`, `Incoming`: All edges to `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - /// - /// Use [`.neighbors_directed(a, dir).detach()`][1] to get a neighbor walker that does - /// not borrow from the graph. - /// - /// [1]: struct.Neighbors.html#method.detach - pub fn neighbors_directed(&self, a: NodeIndex<Ix>, dir: Direction) -> Neighbors<E, Ix> { - let mut iter = self.neighbors_undirected(a); - if self.is_directed() { - let k = dir.index(); - iter.next[1 - k] = EdgeIndex::end(); - iter.skip_start = NodeIndex::end(); - } - iter - } - - /// Return an iterator of all neighbors that have an edge between them and `a`, - /// in either direction. - /// If the graph's edges are undirected, this is equivalent to *.neighbors(a)*. - /// - /// - `Directed` and `Undirected`: All edges connected to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `NodeIndex<Ix>`. - /// - /// Use [`.neighbors_undirected(a).detach()`][1] to get a neighbor walker that does - /// not borrow from the graph. - /// - /// [1]: struct.Neighbors.html#method.detach - pub fn neighbors_undirected(&self, a: NodeIndex<Ix>) -> Neighbors<E, Ix> { - Neighbors { - skip_start: a, - edges: &self.g.edges, - next: match self.get_node(a) { - None => [EdgeIndex::end(), EdgeIndex::end()], - Some(n) => n.next, - }, - } - } - - /// Return an iterator of all edges of `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edges(&self, a: NodeIndex<Ix>) -> Edges<E, Ty, Ix> { - self.edges_directed(a, Outgoing) - } - - /// Return an iterator of all edges of `a`, in the specified direction. - /// - /// - `Directed`, `Outgoing`: All edges from `a`. - /// - `Directed`, `Incoming`: All edges to `a`. - /// - `Undirected`, `Outgoing`: All edges connected to `a`, with `a` being the source of each - /// edge. - /// - `Undirected`, `Incoming`: All edges connected to `a`, with `a` being the target of each - /// edge. - /// - /// Produces an empty iterator if the node `a` doesn't exist.<br> - /// Iterator element type is `EdgeReference<E, Ix>`. - pub fn edges_directed(&self, a: NodeIndex<Ix>, dir: Direction) -> Edges<E, Ty, Ix> { - Edges { - skip_start: a, - edges: &self.g.edges, - direction: dir, - next: match self.get_node(a) { - None => [EdgeIndex::end(), EdgeIndex::end()], - Some(n) => n.next, - }, - ty: PhantomData, - } - } - - /// Return an iterator over either the nodes without edges to them - /// (`Incoming`) or from them (`Outgoing`). - /// - /// An *internal* node has both incoming and outgoing edges. - /// The nodes in `.externals(Incoming)` are the source nodes and - /// `.externals(Outgoing)` are the sinks of the graph. - /// - /// For a graph with undirected edges, both the sinks and the sources are - /// just the nodes without edges. - /// - /// The whole iteration computes in **O(|V|)** time. - pub fn externals(&self, dir: Direction) -> Externals<N, Ty, Ix> { - Externals { - iter: self.raw_nodes().iter().enumerate(), - dir, - ty: PhantomData, - } - } - - /// Index the `StableGraph` by two indices, any combination of - /// node or edge indices is fine. - /// - /// **Panics** if the indices are equal or if they are out of bounds. - pub fn index_twice_mut<T, U>( - &mut self, - i: T, - j: U, - ) -> ( - &mut <Self as Index<T>>::Output, - &mut <Self as Index<U>>::Output, - ) - where - Self: IndexMut<T> + IndexMut<U>, - T: GraphIndex, - U: GraphIndex, - { - assert!(T::is_node_index() != U::is_node_index() || i.index() != j.index()); - - // Allow two mutable indexes here -- they are nonoverlapping - unsafe { - let self_mut = self as *mut _; - ( - <Self as IndexMut<T>>::index_mut(&mut *self_mut, i), - <Self as IndexMut<U>>::index_mut(&mut *self_mut, j), - ) - } - } - - /// Keep all nodes that return `true` from the `visit` closure, - /// remove the others. - /// - /// `visit` is provided a proxy reference to the graph, so that - /// the graph can be walked and associated data modified. - /// - /// The order nodes are visited is not specified. - /// - /// The node indices of the removed nodes are invalidated, but none other. - /// Edge indices are invalidated as they would be following the removal of - /// each edge with an endpoint in a removed node. - /// - /// Computes in **O(n + e')** time, where **n** is the number of node indices and - /// **e'** is the number of affected edges, including *n* calls to `.remove_edge()` - /// where *n* is the number of edges with an endpoint in a removed node. - pub fn retain_nodes<F>(&mut self, mut visit: F) - where - F: FnMut(Frozen<Self>, NodeIndex<Ix>) -> bool, - { - for i in 0..self.node_bound() { - let ix = node_index(i); - if self.contains_node(ix) && !visit(Frozen(self), ix) { - self.remove_node(ix); - } - } - self.check_free_lists(); - } - - /// Keep all edges that return `true` from the `visit` closure, - /// remove the others. - /// - /// `visit` is provided a proxy reference to the graph, so that - /// the graph can be walked and associated data modified. - /// - /// The order edges are visited is not specified. - /// - /// The edge indices of the removed edes are invalidated, but none other. - /// - /// Computes in **O(e'')** time, **e'** is the number of affected edges, - /// including the calls to `.remove_edge()` for each removed edge. - pub fn retain_edges<F>(&mut self, mut visit: F) - where - F: FnMut(Frozen<Self>, EdgeIndex<Ix>) -> bool, - { - for i in 0..self.edge_bound() { - let ix = edge_index(i); - if self.edge_weight(ix).is_some() && !visit(Frozen(self), ix) { - self.remove_edge(ix); - } - } - self.check_free_lists(); - } - - /// Create a new `StableGraph` from an iterable of edges. - /// - /// Node weights `N` are set to default values. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - /// - /// ``` - /// use petgraph::stable_graph::StableGraph; - /// - /// let gr = StableGraph::<(), i32>::from_edges(&[ - /// (0, 1), (0, 2), (0, 3), - /// (1, 2), (1, 3), - /// (2, 3), - /// ]); - /// ``` - pub fn from_edges<I>(iterable: I) -> Self - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E>, - <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>, - N: Default, - { - let mut g = Self::with_capacity(0, 0); - g.extend_with_edges(iterable); - g - } - - /// Create a new `StableGraph` by mapping node and - /// edge weights to new values. - /// - /// The resulting graph has the same structure and the same - /// graph indices as `self`. - pub fn map<'a, F, G, N2, E2>( - &'a self, - mut node_map: F, - mut edge_map: G, - ) -> StableGraph<N2, E2, Ty, Ix> - where - F: FnMut(NodeIndex<Ix>, &'a N) -> N2, - G: FnMut(EdgeIndex<Ix>, &'a E) -> E2, - { - let g = self.g.map( - move |i, w| w.as_ref().map(|w| node_map(i, w)), - move |i, w| w.as_ref().map(|w| edge_map(i, w)), - ); - StableGraph { - g, - node_count: self.node_count, - edge_count: self.edge_count, - free_node: self.free_node, - free_edge: self.free_edge, - } - } - - /// Create a new `StableGraph` by mapping nodes and edges. - /// A node or edge may be mapped to `None` to exclude it from - /// the resulting graph. - /// - /// Nodes are mapped first with the `node_map` closure, then - /// `edge_map` is called for the edges that have not had any endpoint - /// removed. - /// - /// The resulting graph has the structure of a subgraph of the original graph. - /// Nodes and edges that are not removed maintain their old node or edge - /// indices. - pub fn filter_map<'a, F, G, N2, E2>( - &'a self, - mut node_map: F, - mut edge_map: G, - ) -> StableGraph<N2, E2, Ty, Ix> - where - F: FnMut(NodeIndex<Ix>, &'a N) -> Option<N2>, - G: FnMut(EdgeIndex<Ix>, &'a E) -> Option<E2>, - { - let node_bound = self.node_bound(); - let edge_bound = self.edge_bound(); - let mut result_g = StableGraph::with_capacity(node_bound, edge_bound); - // use separate free lists so that - // add_node / add_edge below do not reuse the tombstones - let mut free_node = NodeIndex::end(); - let mut free_edge = EdgeIndex::end(); - - // the stable graph keeps the node map itself - - for (i, node) in enumerate(self.raw_nodes()) { - if i >= node_bound { - break; - } - if let Some(node_weight) = node.weight.as_ref() { - if let Some(new_weight) = node_map(NodeIndex::new(i), node_weight) { - result_g.add_node(new_weight); - continue; - } - } - result_g.add_vacant_node(&mut free_node); - } - for (i, edge) in enumerate(self.raw_edges()) { - if i >= edge_bound { - break; - } - let source = edge.source(); - let target = edge.target(); - if let Some(edge_weight) = edge.weight.as_ref() { - if result_g.contains_node(source) && result_g.contains_node(target) { - if let Some(new_weight) = edge_map(EdgeIndex::new(i), edge_weight) { - result_g.add_edge(source, target, new_weight); - continue; - } - } - } - result_g.add_vacant_edge(&mut free_edge); - } - result_g.free_node = free_node; - result_g.free_edge = free_edge; - result_g.check_free_lists(); - result_g - } - - /// Extend the graph from an iterable of edges. - /// - /// Node weights `N` are set to default values. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - pub fn extend_with_edges<I>(&mut self, iterable: I) - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E>, - <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>, - N: Default, - { - let iter = iterable.into_iter(); - - for elt in iter { - let (source, target, weight) = elt.into_weighted_edge(); - let (source, target) = (source.into(), target.into()); - self.ensure_node_exists(source); - self.ensure_node_exists(target); - self.add_edge(source, target, weight); - } - } - - // - // internal methods - // - fn raw_nodes(&self) -> &[Node<Option<N>, Ix>] { - self.g.raw_nodes() - } - - fn raw_edges(&self) -> &[Edge<Option<E>, Ix>] { - self.g.raw_edges() - } - - /// Create a new node using a vacant position, - /// updating the free nodes doubly linked list. - fn occupy_vacant_node(&mut self, node_idx: NodeIndex<Ix>, weight: N) { - let node_slot = &mut self.g.nodes[node_idx.index()]; - let _old = replace(&mut node_slot.weight, Some(weight)); - debug_assert!(_old.is_none()); - let previous_node = node_slot.next[1]; - let next_node = node_slot.next[0]; - node_slot.next = [EdgeIndex::end(), EdgeIndex::end()]; - if previous_node != EdgeIndex::end() { - self.g.nodes[previous_node.index()].next[0] = next_node; - } - if next_node != EdgeIndex::end() { - self.g.nodes[next_node.index()].next[1] = previous_node; - } - if self.free_node == node_idx { - self.free_node = next_node._into_node(); - } - self.node_count += 1; - } - - /// Create the node if it does not exist, - /// adding vacant nodes for padding if needed. - fn ensure_node_exists(&mut self, node_ix: NodeIndex<Ix>) - where - N: Default, - { - if let Some(Some(_)) = self.g.node_weight(node_ix) { - return; - } - while node_ix.index() >= self.g.node_count() { - let mut free_node = self.free_node; - self.add_vacant_node(&mut free_node); - self.free_node = free_node; - } - self.occupy_vacant_node(node_ix, N::default()); - } - - #[cfg(feature = "serde-1")] - /// Fix up node and edge links after deserialization - fn link_edges(&mut self) -> Result<(), NodeIndex<Ix>> { - // set up free node list - self.node_count = 0; - self.edge_count = 0; - let mut free_node = NodeIndex::end(); - for node_index in 0..self.g.node_count() { - let node = &mut self.g.nodes[node_index]; - if node.weight.is_some() { - self.node_count += 1; - } else { - // free node - node.next = [free_node._into_edge(), EdgeIndex::end()]; - if free_node != NodeIndex::end() { - self.g.nodes[free_node.index()].next[1] = EdgeIndex::new(node_index); - } - free_node = NodeIndex::new(node_index); - } - } - self.free_node = free_node; - - let mut free_edge = EdgeIndex::end(); - for (edge_index, edge) in enumerate(&mut self.g.edges) { - if edge.weight.is_none() { - // free edge - edge.next = [free_edge, EdgeIndex::end()]; - free_edge = EdgeIndex::new(edge_index); - continue; - } - let a = edge.source(); - let b = edge.target(); - let edge_idx = EdgeIndex::new(edge_index); - match index_twice(&mut self.g.nodes, a.index(), b.index()) { - Pair::None => return Err(if a > b { a } else { b }), - Pair::One(an) => { - edge.next = an.next; - an.next[0] = edge_idx; - an.next[1] = edge_idx; - } - Pair::Both(an, bn) => { - // a and b are different indices - edge.next = [an.next[0], bn.next[1]]; - an.next[0] = edge_idx; - bn.next[1] = edge_idx; - } - } - self.edge_count += 1; - } - self.free_edge = free_edge; - Ok(()) - } - - #[cfg(not(debug_assertions))] - fn check_free_lists(&self) {} - #[cfg(debug_assertions)] - // internal method to debug check the free lists (linked lists) - // For the nodes, also check the backpointers of the doubly linked list. - fn check_free_lists(&self) { - let mut free_node = self.free_node; - let mut prev_free_node = NodeIndex::end(); - let mut free_node_len = 0; - while free_node != NodeIndex::end() { - if let Some(n) = self.g.nodes.get(free_node.index()) { - if n.weight.is_none() { - debug_assert_eq!(n.next[1]._into_node(), prev_free_node); - prev_free_node = free_node; - free_node = n.next[0]._into_node(); - free_node_len += 1; - continue; - } - debug_assert!( - false, - "Corrupt free list: pointing to existing {:?}", - free_node.index() - ); - } - debug_assert!(false, "Corrupt free list: missing {:?}", free_node.index()); - } - debug_assert_eq!(self.node_count(), self.raw_nodes().len() - free_node_len); - - let mut free_edge_len = 0; - let mut free_edge = self.free_edge; - while free_edge != EdgeIndex::end() { - if let Some(n) = self.g.edges.get(free_edge.index()) { - if n.weight.is_none() { - free_edge = n.next[0]; - free_edge_len += 1; - continue; - } - debug_assert!( - false, - "Corrupt free list: pointing to existing {:?}", - free_node.index() - ); - } - debug_assert!(false, "Corrupt free list: missing {:?}", free_edge.index()); - } - debug_assert_eq!(self.edge_count(), self.raw_edges().len() - free_edge_len); - } -} - -/// The resulting cloned graph has the same graph indices as `self`. -impl<N, E, Ty, Ix: IndexType> Clone for StableGraph<N, E, Ty, Ix> -where - N: Clone, - E: Clone, -{ - fn clone(&self) -> Self { - StableGraph { - g: self.g.clone(), - node_count: self.node_count, - edge_count: self.edge_count, - free_node: self.free_node, - free_edge: self.free_edge, - } - } - - fn clone_from(&mut self, rhs: &Self) { - self.g.clone_from(&rhs.g); - self.node_count = rhs.node_count; - self.edge_count = rhs.edge_count; - self.free_node = rhs.free_node; - self.free_edge = rhs.free_edge; - } -} - -/// Index the `StableGraph` by `NodeIndex` to access node weights. -/// -/// **Panics** if the node doesn't exist. -impl<N, E, Ty, Ix> Index<NodeIndex<Ix>> for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Output = N; - fn index(&self, index: NodeIndex<Ix>) -> &N { - self.node_weight(index).unwrap() - } -} - -/// Index the `StableGraph` by `NodeIndex` to access node weights. -/// -/// **Panics** if the node doesn't exist. -impl<N, E, Ty, Ix> IndexMut<NodeIndex<Ix>> for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn index_mut(&mut self, index: NodeIndex<Ix>) -> &mut N { - self.node_weight_mut(index).unwrap() - } -} - -/// Index the `StableGraph` by `EdgeIndex` to access edge weights. -/// -/// **Panics** if the edge doesn't exist. -impl<N, E, Ty, Ix> Index<EdgeIndex<Ix>> for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Output = E; - fn index(&self, index: EdgeIndex<Ix>) -> &E { - self.edge_weight(index).unwrap() - } -} - -/// Index the `StableGraph` by `EdgeIndex` to access edge weights. -/// -/// **Panics** if the edge doesn't exist. -impl<N, E, Ty, Ix> IndexMut<EdgeIndex<Ix>> for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn index_mut(&mut self, index: EdgeIndex<Ix>) -> &mut E { - self.edge_weight_mut(index).unwrap() - } -} - -/// Create a new empty `StableGraph`. -impl<N, E, Ty, Ix> Default for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn default() -> Self { - Self::with_capacity(0, 0) - } -} - -/// Convert a `Graph` into a `StableGraph` -/// -/// Computes in **O(|V| + |E|)** time. -/// -/// The resulting graph has the same node and edge indices as -/// the original graph. -impl<N, E, Ty, Ix> From<Graph<N, E, Ty, Ix>> for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn from(g: Graph<N, E, Ty, Ix>) -> Self { - let nodes = g.nodes.into_iter().map(|e| Node { - weight: Some(e.weight), - next: e.next, - }); - let edges = g.edges.into_iter().map(|e| Edge { - weight: Some(e.weight), - node: e.node, - next: e.next, - }); - StableGraph { - node_count: nodes.len(), - edge_count: edges.len(), - g: Graph { - edges: edges.collect(), - nodes: nodes.collect(), - ty: g.ty, - }, - free_node: NodeIndex::end(), - free_edge: EdgeIndex::end(), - } - } -} - -/// Convert a `StableGraph` into a `Graph` -/// -/// Computes in **O(|V| + |E|)** time. -/// -/// This translates the stable graph into a graph with node and edge indices in -/// a compact interval without holes (like `Graph`s always are). -/// -/// Only if the stable graph had no vacancies after deletions (if node bound was -/// equal to node count, and the same for edges), would the resulting graph have -/// the same node and edge indices as the input. -impl<N, E, Ty, Ix> From<StableGraph<N, E, Ty, Ix>> for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn from(graph: StableGraph<N, E, Ty, Ix>) -> Self { - let mut result_g = Graph::with_capacity(graph.node_count(), graph.edge_count()); - // mapping from old node index to new node index - let mut node_index_map = vec![NodeIndex::end(); graph.node_bound()]; - - for (i, node) in enumerate(graph.g.nodes) { - if let Some(nw) = node.weight { - node_index_map[i] = result_g.add_node(nw); - } - } - for edge in graph.g.edges { - let source_index = edge.source().index(); - let target_index = edge.target().index(); - if let Some(ew) = edge.weight { - let source = node_index_map[source_index]; - let target = node_index_map[target_index]; - debug_assert!(source != NodeIndex::end()); - debug_assert!(target != NodeIndex::end()); - result_g.add_edge(source, target, ew); - } - } - result_g - } -} - -/// Iterator over all nodes of a graph. -#[derive(Debug, Clone)] -pub struct NodeReferences<'a, N: 'a, Ix: IndexType = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Node<Option<N>, Ix>>>, -} - -impl<'a, N, Ix> Iterator for NodeReferences<'a, N, Ix> -where - Ix: IndexType, -{ - type Item = (NodeIndex<Ix>, &'a N); - - fn next(&mut self) -> Option<Self::Item> { - self.iter - .ex_find_map(|(i, node)| node.weight.as_ref().map(move |w| (node_index(i), w))) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, hi) = self.iter.size_hint(); - (0, hi) - } -} - -impl<N, Ix> DoubleEndedIterator for NodeReferences<'_, N, Ix> -where - Ix: IndexType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.iter - .ex_rfind_map(|(i, node)| node.weight.as_ref().map(move |w| (node_index(i), w))) - } -} - -/// Reference to a `StableGraph` edge. -#[derive(Debug)] -pub struct EdgeReference<'a, E: 'a, Ix = DefaultIx> { - index: EdgeIndex<Ix>, - node: [NodeIndex<Ix>; 2], - weight: &'a E, -} - -impl<E, Ix: IndexType> Clone for EdgeReference<'_, E, Ix> { - fn clone(&self) -> Self { - *self - } -} - -impl<E, Ix: IndexType> Copy for EdgeReference<'_, E, Ix> {} - -impl<E, Ix: IndexType> PartialEq for EdgeReference<'_, E, Ix> -where - E: PartialEq, -{ - fn eq(&self, rhs: &Self) -> bool { - self.index == rhs.index && self.weight == rhs.weight - } -} - -impl<'a, Ix, E> EdgeReference<'a, E, Ix> -where - Ix: IndexType, -{ - /// Access the edge’s weight. - /// - /// **NOTE** that this method offers a longer lifetime - /// than the trait (unfortunately they don't match yet). - pub fn weight(&self) -> &'a E { - self.weight - } -} - -/// Iterator over the edges of from or to a node -#[derive(Debug, Clone)] -pub struct Edges<'a, E: 'a, Ty, Ix: 'a = DefaultIx> -where - Ty: EdgeType, - Ix: IndexType, -{ - /// starting node to skip over - skip_start: NodeIndex<Ix>, - edges: &'a [Edge<Option<E>, Ix>], - - /// Next edge to visit. - next: [EdgeIndex<Ix>; 2], - - /// For directed graphs: the direction to iterate in - /// For undirected graphs: the direction of edges - direction: Direction, - ty: PhantomData<Ty>, -} - -impl<'a, E, Ty, Ix> Iterator for Edges<'a, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ix>; - - fn next(&mut self) -> Option<Self::Item> { - // type direction | iterate over reverse - // | - // Directed Outgoing | outgoing no - // Directed Incoming | incoming no - // Undirected Outgoing | both incoming - // Undirected Incoming | both outgoing - - // For iterate_over, "both" is represented as None. - // For reverse, "no" is represented as None. - let (iterate_over, reverse) = if Ty::is_directed() { - (Some(self.direction), None) - } else { - (None, Some(self.direction.opposite())) - }; - - if iterate_over.unwrap_or(Outgoing) == Outgoing { - let i = self.next[0].index(); - if let Some(Edge { - node, - weight: Some(weight), - next, - }) = self.edges.get(i) - { - self.next[0] = next[0]; - return Some(EdgeReference { - index: edge_index(i), - node: if reverse == Some(Outgoing) { - swap_pair(*node) - } else { - *node - }, - weight, - }); - } - } - - if iterate_over.unwrap_or(Incoming) == Incoming { - while let Some(Edge { node, weight, next }) = self.edges.get(self.next[1].index()) { - debug_assert!(weight.is_some()); - let edge_index = self.next[1]; - self.next[1] = next[1]; - // In any of the "both" situations, self-loops would be iterated over twice. - // Skip them here. - if iterate_over.is_none() && node[0] == self.skip_start { - continue; - } - - return Some(EdgeReference { - index: edge_index, - node: if reverse == Some(Incoming) { - swap_pair(*node) - } else { - *node - }, - weight: weight.as_ref().unwrap(), - }); - } - } - - None - } -} - -/// Iterator over the multiple directed edges connecting a source node to a target node -#[derive(Debug, Clone)] -pub struct EdgesConnecting<'a, E: 'a, Ty, Ix: 'a = DefaultIx> -where - Ty: EdgeType, - Ix: IndexType, -{ - target_node: NodeIndex<Ix>, - edges: Edges<'a, E, Ty, Ix>, - ty: PhantomData<Ty>, -} - -impl<'a, E, Ty, Ix> Iterator for EdgesConnecting<'a, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ix>; - - fn next(&mut self) -> Option<EdgeReference<'a, E, Ix>> { - let target_node = self.target_node; - self.edges - .by_ref() - .find(|&edge| edge.node[1] == target_node) - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.edges.size_hint(); - (0, upper) - } -} - -fn swap_pair<T>(mut x: [T; 2]) -> [T; 2] { - x.swap(0, 1); - x -} - -/// Iterator over all edges of a graph. -#[derive(Debug, Clone)] -pub struct EdgeReferences<'a, E: 'a, Ix: 'a = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Edge<Option<E>, Ix>>>, -} - -impl<'a, E, Ix> Iterator for EdgeReferences<'a, E, Ix> -where - Ix: IndexType, -{ - type Item = EdgeReference<'a, E, Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.iter.ex_find_map(|(i, edge)| { - edge.weight.as_ref().map(move |weight| EdgeReference { - index: edge_index(i), - node: edge.node, - weight, - }) - }) - } -} - -impl<E, Ix> DoubleEndedIterator for EdgeReferences<'_, E, Ix> -where - Ix: IndexType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.iter.ex_rfind_map(|(i, edge)| { - edge.weight.as_ref().map(move |weight| EdgeReference { - index: edge_index(i), - node: edge.node, - weight, - }) - }) - } -} - -/// An iterator over either the nodes without edges to them or from them. -#[derive(Debug, Clone)] -pub struct Externals<'a, N: 'a, Ty, Ix: IndexType = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Node<Option<N>, Ix>>>, - dir: Direction, - ty: PhantomData<Ty>, -} - -impl<'a, N: 'a, Ty, Ix> Iterator for Externals<'a, N, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Item = NodeIndex<Ix>; - fn next(&mut self) -> Option<NodeIndex<Ix>> { - let k = self.dir.index(); - loop { - match self.iter.next() { - None => return None, - Some((index, node)) => { - if node.weight.is_some() - && node.next[k] == EdgeIndex::end() - && (Ty::is_directed() || node.next[1 - k] == EdgeIndex::end()) - { - return Some(NodeIndex::new(index)); - } else { - continue; - } - } - } - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -/// Iterator over the neighbors of a node. -/// -/// Iterator element type is `NodeIndex`. -#[derive(Debug, Clone)] -pub struct Neighbors<'a, E: 'a, Ix: 'a = DefaultIx> { - /// starting node to skip over - skip_start: NodeIndex<Ix>, - edges: &'a [Edge<Option<E>, Ix>], - next: [EdgeIndex<Ix>; 2], -} - -impl<E, Ix> Neighbors<'_, E, Ix> -where - Ix: IndexType, -{ - /// Return a “walker” object that can be used to step through the - /// neighbors and edges from the origin node. - /// - /// Note: The walker does not borrow from the graph, this is to allow mixing - /// edge walking with mutating the graph's weights. - pub fn detach(&self) -> WalkNeighbors<Ix> { - WalkNeighbors { - inner: super::WalkNeighbors { - skip_start: self.skip_start, - next: self.next, - }, - } - } -} - -impl<E, Ix> Iterator for Neighbors<'_, E, Ix> -where - Ix: IndexType, -{ - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<NodeIndex<Ix>> { - // First any outgoing edges - match self.edges.get(self.next[0].index()) { - None => {} - Some(edge) => { - debug_assert!(edge.weight.is_some()); - self.next[0] = edge.next[0]; - return Some(edge.node[1]); - } - } - // Then incoming edges - // For an "undirected" iterator (traverse both incoming - // and outgoing edge lists), make sure we don't double - // count selfloops by skipping them in the incoming list. - while let Some(edge) = self.edges.get(self.next[1].index()) { - debug_assert!(edge.weight.is_some()); - self.next[1] = edge.next[1]; - if edge.node[0] != self.skip_start { - return Some(edge.node[0]); - } - } - None - } -} - -/// A “walker” object that can be used to step through the edge list of a node. -/// -/// See [*.detach()*](struct.Neighbors.html#method.detach) for more information. -/// -/// The walker does not borrow from the graph, so it lets you step through -/// neighbors or incident edges while also mutating graph weights, as -/// in the following example: -/// -/// ``` -/// use petgraph::visit::Dfs; -/// use petgraph::Incoming; -/// use petgraph::stable_graph::StableGraph; -/// -/// let mut gr = StableGraph::new(); -/// let a = gr.add_node(0.); -/// let b = gr.add_node(0.); -/// let c = gr.add_node(0.); -/// gr.add_edge(a, b, 3.); -/// gr.add_edge(b, c, 2.); -/// gr.add_edge(c, b, 1.); -/// -/// // step through the graph and sum incoming edges into the node weight -/// let mut dfs = Dfs::new(&gr, a); -/// while let Some(node) = dfs.next(&gr) { -/// // use a detached neighbors walker -/// let mut edges = gr.neighbors_directed(node, Incoming).detach(); -/// while let Some(edge) = edges.next_edge(&gr) { -/// gr[node] += gr[edge]; -/// } -/// } -/// -/// // check the result -/// assert_eq!(gr[a], 0.); -/// assert_eq!(gr[b], 4.); -/// assert_eq!(gr[c], 2.); -/// ``` -pub struct WalkNeighbors<Ix> { - inner: super::WalkNeighbors<Ix>, -} - -impl<Ix: IndexType> Clone for WalkNeighbors<Ix> { - clone_fields!(WalkNeighbors, inner); -} - -impl<Ix: IndexType> WalkNeighbors<Ix> { - /// Step to the next edge and its endpoint node in the walk for graph `g`. - /// - /// The next node indices are always the others than the starting point - /// where the `WalkNeighbors` value was created. - /// For an `Outgoing` walk, the target nodes, - /// for an `Incoming` walk, the source nodes of the edge. - pub fn next<N, E, Ty: EdgeType>( - &mut self, - g: &StableGraph<N, E, Ty, Ix>, - ) -> Option<(EdgeIndex<Ix>, NodeIndex<Ix>)> { - self.inner.next(&g.g) - } - - pub fn next_node<N, E, Ty: EdgeType>( - &mut self, - g: &StableGraph<N, E, Ty, Ix>, - ) -> Option<NodeIndex<Ix>> { - self.next(g).map(|t| t.1) - } - - pub fn next_edge<N, E, Ty: EdgeType>( - &mut self, - g: &StableGraph<N, E, Ty, Ix>, - ) -> Option<EdgeIndex<Ix>> { - self.next(g).map(|t| t.0) - } -} - -/// Iterator over the node indices of a graph. -#[derive(Debug, Clone)] -pub struct NodeIndices<'a, N: 'a, Ix: 'a = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Node<Option<N>, Ix>>>, -} - -impl<N, Ix: IndexType> Iterator for NodeIndices<'_, N, Ix> { - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.iter.ex_find_map(|(i, node)| { - if node.weight.is_some() { - Some(node_index(i)) - } else { - None - } - }) - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<N, Ix: IndexType> DoubleEndedIterator for NodeIndices<'_, N, Ix> { - fn next_back(&mut self) -> Option<Self::Item> { - self.iter.ex_rfind_map(|(i, node)| { - if node.weight.is_some() { - Some(node_index(i)) - } else { - None - } - }) - } -} - -/// Iterator over the edge indices of a graph. -#[derive(Debug, Clone)] -pub struct EdgeIndices<'a, E: 'a, Ix: 'a = DefaultIx> { - iter: iter::Enumerate<slice::Iter<'a, Edge<Option<E>, Ix>>>, -} - -impl<E, Ix: IndexType> Iterator for EdgeIndices<'_, E, Ix> { - type Item = EdgeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.iter.ex_find_map(|(i, node)| { - if node.weight.is_some() { - Some(edge_index(i)) - } else { - None - } - }) - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<E, Ix: IndexType> DoubleEndedIterator for EdgeIndices<'_, E, Ix> { - fn next_back(&mut self) -> Option<Self::Item> { - self.iter.ex_rfind_map(|(i, node)| { - if node.weight.is_some() { - Some(edge_index(i)) - } else { - None - } - }) - } -} - -impl<N, E, Ty, Ix> visit::GraphBase for StableGraph<N, E, Ty, Ix> -where - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex<Ix>; -} - -impl<N, E, Ty, Ix> visit::Visitable for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Map = FixedBitSet; - fn visit_map(&self) -> FixedBitSet { - FixedBitSet::with_capacity(self.node_bound()) - } - fn reset_map(&self, map: &mut Self::Map) { - map.clear(); - map.grow(self.node_bound()); - } -} - -impl<N, E, Ty, Ix> visit::Data for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeWeight = N; - type EdgeWeight = E; -} - -impl<N, E, Ty, Ix> visit::GraphProp for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgeType = Ty; -} - -impl<'a, N, E: 'a, Ty, Ix> visit::IntoNodeIdentifiers for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeIdentifiers = NodeIndices<'a, N, Ix>; - fn node_identifiers(self) -> Self::NodeIdentifiers { - StableGraph::node_indices(self) - } -} - -impl<N, E, Ty, Ix> visit::NodeCount for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn node_count(&self) -> usize { - self.node_count() - } -} - -impl<'a, N, E, Ty, Ix> visit::IntoNodeReferences for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NodeRef = (NodeIndex<Ix>, &'a N); - type NodeReferences = NodeReferences<'a, N, Ix>; - fn node_references(self) -> Self::NodeReferences { - NodeReferences { - iter: enumerate(self.raw_nodes()), - } - } -} - -impl<N, E, Ty, Ix> visit::NodeIndexable for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - /// Return an upper bound of the node indices in the graph - fn node_bound(&self) -> usize { - self.node_indices().next_back().map_or(0, |i| i.index() + 1) - } - fn to_index(&self, ix: NodeIndex<Ix>) -> usize { - ix.index() - } - fn from_index(&self, ix: usize) -> Self::NodeId { - NodeIndex::new(ix) - } -} - -impl<'a, N, E: 'a, Ty, Ix> visit::IntoNeighbors for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Neighbors = Neighbors<'a, E, Ix>; - fn neighbors(self, n: Self::NodeId) -> Self::Neighbors { - (*self).neighbors(n) - } -} - -impl<'a, N, E: 'a, Ty, Ix> visit::IntoNeighborsDirected for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type NeighborsDirected = Neighbors<'a, E, Ix>; - fn neighbors_directed(self, n: NodeIndex<Ix>, d: Direction) -> Self::NeighborsDirected { - StableGraph::neighbors_directed(self, n, d) - } -} - -impl<'a, N, E, Ty, Ix> visit::IntoEdges for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type Edges = Edges<'a, E, Ty, Ix>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - self.edges(a) - } -} - -impl<Ix, E> visit::EdgeRef for EdgeReference<'_, E, Ix> -where - Ix: IndexType, -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = EdgeIndex<Ix>; - type Weight = E; - - fn source(&self) -> Self::NodeId { - self.node[0] - } - fn target(&self) -> Self::NodeId { - self.node[1] - } - fn weight(&self) -> &E { - self.weight - } - fn id(&self) -> Self::EdgeId { - self.index - } -} - -impl<N, E, Ty, Ix> visit::EdgeIndexable for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - fn edge_bound(&self) -> usize { - self.edge_references() - .next_back() - .map_or(0, |edge| edge.id().index() + 1) - } - - fn to_index(&self, ix: EdgeIndex<Ix>) -> usize { - ix.index() - } - - fn from_index(&self, ix: usize) -> Self::EdgeId { - EdgeIndex::new(ix) - } -} - -impl<'a, N, E, Ty, Ix> visit::IntoEdgesDirected for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgesDirected = Edges<'a, E, Ty, Ix>; - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::EdgesDirected { - self.edges_directed(a, dir) - } -} - -impl<'a, N: 'a, E: 'a, Ty, Ix> visit::IntoEdgeReferences for &'a StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type EdgeRef = EdgeReference<'a, E, Ix>; - type EdgeReferences = EdgeReferences<'a, E, Ix>; - - /// Create an iterator over all edges in the graph, in indexed order. - /// - /// Iterator element type is `EdgeReference<E, Ix>`. - fn edge_references(self) -> Self::EdgeReferences { - EdgeReferences { - iter: self.g.edges.iter().enumerate(), - } - } -} - -impl<N, E, Ty, Ix> visit::EdgeCount for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - #[inline] - fn edge_count(&self) -> usize { - self.edge_count() - } -} - -#[test] -fn stable_graph() { - let mut gr = StableGraph::<_, _>::with_capacity(0, 0); - let a = gr.add_node(0); - let b = gr.add_node(1); - let c = gr.add_node(2); - let _ed = gr.add_edge(a, b, 1); - println!("{:?}", gr); - gr.remove_node(b); - println!("{:?}", gr); - let d = gr.add_node(3); - println!("{:?}", gr); - gr.check_free_lists(); - gr.remove_node(a); - gr.check_free_lists(); - gr.remove_node(c); - gr.check_free_lists(); - println!("{:?}", gr); - gr.add_edge(d, d, 2); - println!("{:?}", gr); - - let e = gr.add_node(4); - gr.add_edge(d, e, 3); - println!("{:?}", gr); - for neigh in gr.neighbors(d) { - println!("edge {:?} -> {:?}", d, neigh); - } - gr.check_free_lists(); -} - -#[test] -fn dfs() { - use crate::visit::Dfs; - - let mut gr = StableGraph::<_, _>::with_capacity(0, 0); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - let d = gr.add_node("d"); - gr.add_edge(a, b, 1); - gr.add_edge(a, c, 2); - gr.add_edge(b, c, 3); - gr.add_edge(b, d, 4); - gr.add_edge(c, d, 5); - gr.add_edge(d, b, 6); - gr.add_edge(c, b, 7); - println!("{:?}", gr); - - let mut dfs = Dfs::new(&gr, a); - while let Some(next) = dfs.next(&gr) { - println!("dfs visit => {:?}, weight={:?}", next, &gr[next]); - } -} - -#[test] -fn test_retain_nodes() { - let mut gr = StableGraph::<_, _>::with_capacity(6, 6); - let a = gr.add_node("a"); - let f = gr.add_node("f"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - let d = gr.add_node("d"); - let e = gr.add_node("e"); - gr.add_edge(a, b, 1); - gr.add_edge(a, c, 2); - gr.add_edge(b, c, 3); - gr.add_edge(b, d, 4); - gr.add_edge(c, d, 5); - gr.add_edge(d, b, 6); - gr.add_edge(c, b, 7); - gr.add_edge(d, e, 8); - gr.remove_node(f); - - assert_eq!(gr.node_count(), 5); - assert_eq!(gr.edge_count(), 8); - gr.retain_nodes(|frozen_gr, ix| frozen_gr[ix] >= "c"); - assert_eq!(gr.node_count(), 3); - assert_eq!(gr.edge_count(), 2); - - gr.check_free_lists(); -} - -#[test] -fn extend_with_edges() { - let mut gr = StableGraph::<_, _>::default(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - let _d = gr.add_node("d"); - gr.remove_node(a); - gr.remove_node(b); - gr.remove_node(c); - - gr.extend_with_edges(vec![(0, 1, ())]); - assert_eq!(gr.node_count(), 3); - assert_eq!(gr.edge_count(), 1); - gr.check_free_lists(); - - gr.extend_with_edges(vec![(5, 1, ())]); - assert_eq!(gr.node_count(), 4); - assert_eq!(gr.edge_count(), 2); - gr.check_free_lists(); -} - -#[test] -fn test_reverse() { - let mut gr = StableGraph::<_, _>::default(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - - gr.add_edge(a, b, 0); - - let mut reversed_gr = gr.clone(); - reversed_gr.reverse(); - - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Incoming), reversed_gr.edges(i)); - } -} diff --git a/vendor/petgraph/src/graph_impl/stable_graph/serialization.rs b/vendor/petgraph/src/graph_impl/stable_graph/serialization.rs deleted file mode 100644 index 8292422c..00000000 --- a/vendor/petgraph/src/graph_impl/stable_graph/serialization.rs +++ /dev/null @@ -1,298 +0,0 @@ -use serde::de::Error; -use serde::{Deserialize, Deserializer, Serialize, Serializer}; - -use std::marker::PhantomData; - -use crate::prelude::*; - -use crate::graph::Node; -use crate::graph::{Edge, IndexType}; -use crate::serde_utils::CollectSeqWithLength; -use crate::serde_utils::MappedSequenceVisitor; -use crate::serde_utils::{FromDeserialized, IntoSerializable}; -use crate::stable_graph::StableGraph; -use crate::visit::{EdgeIndexable, NodeIndexable}; -use crate::EdgeType; - -use super::super::serialization::{ - invalid_hole_err, invalid_length_err, invalid_node_err, EdgeProperty, -}; - -// Serialization representation for StableGraph -// Keep in sync with deserialization and Graph -#[derive(Serialize)] -#[serde(rename = "Graph")] -#[serde(bound(serialize = "N: Serialize, E: Serialize, Ix: IndexType + Serialize"))] -pub struct SerStableGraph<'a, N: 'a, E: 'a, Ix: 'a + IndexType> { - nodes: Somes<&'a [Node<Option<N>, Ix>]>, - node_holes: Holes<&'a [Node<Option<N>, Ix>]>, - edge_property: EdgeProperty, - #[serde(serialize_with = "ser_stable_graph_edges")] - edges: &'a [Edge<Option<E>, Ix>], -} - -// Deserialization representation for StableGraph -// Keep in sync with serialization and Graph -#[derive(Deserialize)] -#[serde(rename = "Graph")] -#[serde(bound( - deserialize = "N: Deserialize<'de>, E: Deserialize<'de>, Ix: IndexType + Deserialize<'de>" -))] -pub struct DeserStableGraph<N, E, Ix> { - #[serde(deserialize_with = "deser_stable_graph_nodes")] - nodes: Vec<Node<Option<N>, Ix>>, - #[serde(default = "Vec::new")] - node_holes: Vec<NodeIndex<Ix>>, - edge_property: EdgeProperty, - #[serde(deserialize_with = "deser_stable_graph_edges")] - edges: Vec<Edge<Option<E>, Ix>>, -} - -/// `Somes` are the present node weights N, with known length. -struct Somes<T>(usize, T); - -impl<'a, N, Ix> Serialize for Somes<&'a [Node<Option<N>, Ix>]> -where - N: Serialize, -{ - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - serializer.collect_seq_with_length( - self.0, - self.1.iter().filter_map(|node| node.weight.as_ref()), - ) - } -} - -/// Holes are the node indices of vacancies, with known length -struct Holes<T>(usize, T); - -impl<'a, N, Ix> Serialize for Holes<&'a [Node<Option<N>, Ix>]> -where - Ix: Serialize + IndexType, -{ - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - serializer.collect_seq_with_length( - self.0, - self.1.iter().enumerate().filter_map(|(i, node)| { - if node.weight.is_none() { - Some(NodeIndex::<Ix>::new(i)) - } else { - None - } - }), - ) - } -} - -fn ser_stable_graph_edges<S, E, Ix>( - edges: &&[Edge<Option<E>, Ix>], - serializer: S, -) -> Result<S::Ok, S::Error> -where - S: Serializer, - E: Serialize, - Ix: Serialize + IndexType, -{ - serializer.collect_seq_exact(edges.iter().map(|edge| { - edge.weight - .as_ref() - .map(|w| (edge.source(), edge.target(), w)) - })) -} - -fn deser_stable_graph_nodes<'de, D, N, Ix>( - deserializer: D, -) -> Result<Vec<Node<Option<N>, Ix>>, D::Error> -where - D: Deserializer<'de>, - N: Deserialize<'de>, - Ix: IndexType + Deserialize<'de>, -{ - deserializer.deserialize_seq(MappedSequenceVisitor::new(|n| { - Ok(Node { - weight: Some(n), - next: [EdgeIndex::end(); 2], - }) - })) -} - -fn deser_stable_graph_edges<'de, D, N, Ix>( - deserializer: D, -) -> Result<Vec<Edge<Option<N>, Ix>>, D::Error> -where - D: Deserializer<'de>, - N: Deserialize<'de>, - Ix: IndexType + Deserialize<'de>, -{ - deserializer.deserialize_seq(MappedSequenceVisitor::< - Option<(NodeIndex<Ix>, NodeIndex<Ix>, N)>, - _, - _, - >::new(|x| { - if let Some((i, j, w)) = x { - Ok(Edge { - weight: Some(w), - node: [i, j], - next: [EdgeIndex::end(); 2], - }) - } else { - Ok(Edge { - weight: None, - node: [NodeIndex::end(); 2], - next: [EdgeIndex::end(); 2], - }) - } - })) -} - -impl<'a, N, E, Ty, Ix> IntoSerializable for &'a StableGraph<N, E, Ty, Ix> -where - Ix: IndexType, - Ty: EdgeType, -{ - type Output = SerStableGraph<'a, N, E, Ix>; - fn into_serializable(self) -> Self::Output { - let nodes = &self.raw_nodes()[..self.node_bound()]; - let node_count = self.node_count(); - let hole_count = nodes.len() - node_count; - let edges = &self.raw_edges()[..self.edge_bound()]; - SerStableGraph { - nodes: Somes(node_count, nodes), - node_holes: Holes(hole_count, nodes), - edges: edges, - edge_property: EdgeProperty::from(PhantomData::<Ty>), - } - } -} - -/// Requires crate feature `"serde-1"` -impl<N, E, Ty, Ix> Serialize for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType + Serialize, - N: Serialize, - E: Serialize, -{ - fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> - where - S: Serializer, - { - self.into_serializable().serialize(serializer) - } -} - -impl<'a, N, E, Ty, Ix> FromDeserialized for StableGraph<N, E, Ty, Ix> -where - Ix: IndexType, - Ty: EdgeType, -{ - type Input = DeserStableGraph<N, E, Ix>; - fn from_deserialized<E2>(input: Self::Input) -> Result<Self, E2> - where - E2: Error, - { - let ty = PhantomData::<Ty>::from_deserialized(input.edge_property)?; - let node_holes = input.node_holes; - let edges = input.edges; - if edges.len() >= <Ix as IndexType>::max().index() { - Err(invalid_length_err::<Ix, _>("edge", edges.len()))? - } - - let total_nodes = input.nodes.len() + node_holes.len(); - let mut nodes = Vec::with_capacity(total_nodes); - - let mut compact_nodes = input.nodes.into_iter(); - let mut node_pos = 0; - for hole_pos in node_holes.iter() { - let hole_pos = hole_pos.index(); - if !(node_pos..total_nodes).contains(&hole_pos) { - return Err(invalid_hole_err(hole_pos)); - } - nodes.extend(compact_nodes.by_ref().take(hole_pos - node_pos)); - nodes.push(Node { - weight: None, - next: [EdgeIndex::end(); 2], - }); - node_pos = hole_pos + 1; - debug_assert_eq!(nodes.len(), node_pos); - } - nodes.extend(compact_nodes); - - if nodes.len() >= <Ix as IndexType>::max().index() { - Err(invalid_length_err::<Ix, _>("node", nodes.len()))? - } - - let node_bound = nodes.len(); - let mut sgr = StableGraph { - g: Graph { - nodes: nodes, - edges: edges, - ty: ty, - }, - node_count: 0, - edge_count: 0, - free_edge: EdgeIndex::end(), - free_node: NodeIndex::end(), - }; - sgr.link_edges() - .map_err(|i| invalid_node_err(i.index(), node_bound))?; - Ok(sgr) - } -} - -/// Requires crate feature `"serde-1"` -impl<'de, N, E, Ty, Ix> Deserialize<'de> for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType + Deserialize<'de>, - N: Deserialize<'de>, - E: Deserialize<'de>, -{ - fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> - where - D: Deserializer<'de>, - { - Self::from_deserialized(DeserStableGraph::deserialize(deserializer)?) - } -} - -#[test] -fn test_from_deserialized_with_holes() { - use crate::graph::node_index; - use crate::stable_graph::StableUnGraph; - use itertools::assert_equal; - use serde::de::value::Error as SerdeError; - - let input = DeserStableGraph::<_, (), u32> { - nodes: vec![ - Node { - weight: Some(1), - next: [EdgeIndex::end(); 2], - }, - Node { - weight: Some(4), - next: [EdgeIndex::end(); 2], - }, - Node { - weight: Some(5), - next: [EdgeIndex::end(); 2], - }, - ], - node_holes: vec![node_index(0), node_index(2), node_index(3), node_index(6)], - edges: vec![], - edge_property: EdgeProperty::Undirected, - }; - let graph = StableUnGraph::from_deserialized::<SerdeError>(input).unwrap(); - - assert_eq!(graph.node_count(), 3); - assert_equal( - graph.raw_nodes().iter().map(|n| n.weight.as_ref().cloned()), - vec![None, Some(1), None, None, Some(4), Some(5), None], - ); -} diff --git a/vendor/petgraph/src/graphmap.rs b/vendor/petgraph/src/graphmap.rs deleted file mode 100644 index 855656be..00000000 --- a/vendor/petgraph/src/graphmap.rs +++ /dev/null @@ -1,1504 +0,0 @@ -//! `GraphMap<N, E, Ty>` is a graph datastructure where node values are mapping -//! keys. - -use indexmap::map::Keys; -use indexmap::map::{Iter as IndexMapIter, IterMut as IndexMapIterMut}; -use indexmap::IndexMap; -use std::cmp::Ordering; -use std::collections::hash_map::RandomState; -use std::collections::HashSet; -use std::fmt; -use std::hash::{self, BuildHasher, Hash}; -use std::iter::Copied; -use std::iter::FromIterator; -use std::marker::PhantomData; -use std::mem; -use std::ops::{Deref, Index, IndexMut}; -use std::slice::Iter; - -use crate::{Directed, Direction, EdgeType, Incoming, Outgoing, Undirected}; - -use crate::graph::node_index; -use crate::graph::Graph; -use crate::visit; -use crate::IntoWeightedEdge; - -#[cfg(feature = "rayon")] -use indexmap::map::rayon::{ParIter, ParIterMut, ParKeys}; -#[cfg(feature = "rayon")] -use rayon::prelude::*; - -/// A `GraphMap` with undirected edges. -/// -/// For example, an edge between *1* and *2* is equivalent to an edge between -/// *2* and *1*. -pub type UnGraphMap<N, E> = GraphMap<N, E, Undirected>; -/// A `GraphMap` with directed edges. -/// -/// For example, an edge from *1* to *2* is distinct from an edge from *2* to -/// *1*. -pub type DiGraphMap<N, E> = GraphMap<N, E, Directed>; - -/// `GraphMap<N, E, Ty>` is a graph datastructure using an associative array -/// of its node weights `N`. -/// -/// It uses an combined adjacency list and sparse adjacency matrix -/// representation, using **O(|V| + |E|)** space, and allows testing for edge -/// existence in constant time. -/// -/// `GraphMap` is parameterized over: -/// -/// - Associated data `N` for nodes and `E` for edges, called *weights*. -/// - The node weight `N` must implement `Copy` and will be used as node -/// identifier, duplicated into several places in the data structure. -/// It must be suitable as a hash table key (implementing `Eq + Hash`). -/// The node type must also implement `Ord` so that the implementation can -/// order the pair (`a`, `b`) for an edge connecting any two nodes `a` and `b`. -/// - `E` can be of arbitrary type. -/// - Edge type `Ty` that determines whether the graph edges are directed or -/// undirected. -/// -/// You can use the type aliases `UnGraphMap` and `DiGraphMap` for convenience. -/// -/// `GraphMap` does not allow parallel edges, but self loops are allowed. -/// -/// Depends on crate feature `graphmap` (default). -#[derive(Clone)] -pub struct GraphMap<N, E, Ty, S = RandomState> -where - S: BuildHasher, -{ - nodes: IndexMap<N, Vec<(N, CompactDirection)>, S>, - edges: IndexMap<(N, N), E, S>, - ty: PhantomData<Ty>, -} - -impl<N: Eq + Hash + fmt::Debug, E: fmt::Debug, Ty: EdgeType, S: BuildHasher> fmt::Debug - for GraphMap<N, E, Ty, S> -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.nodes.fmt(f) - } -} - -/// A trait group for `GraphMap`'s node identifier. -pub trait NodeTrait: Copy + Ord + Hash {} -impl<N> NodeTrait for N where N: Copy + Ord + Hash {} - -// non-repr(usize) version of Direction -#[derive(Copy, Clone, Debug, PartialEq)] -enum CompactDirection { - Outgoing, - Incoming, -} - -impl CompactDirection { - /// Return the opposite `CompactDirection`. - #[inline] - pub fn opposite(self) -> CompactDirection { - match self { - CompactDirection::Outgoing => CompactDirection::Incoming, - CompactDirection::Incoming => CompactDirection::Outgoing, - } - } -} - -impl From<Direction> for CompactDirection { - fn from(d: Direction) -> Self { - match d { - Outgoing => CompactDirection::Outgoing, - Incoming => CompactDirection::Incoming, - } - } -} - -impl From<CompactDirection> for Direction { - fn from(d: CompactDirection) -> Self { - match d { - CompactDirection::Outgoing => Outgoing, - CompactDirection::Incoming => Incoming, - } - } -} - -impl PartialEq<Direction> for CompactDirection { - fn eq(&self, rhs: &Direction) -> bool { - (*self as usize) == (*rhs as usize) - } -} - -#[cfg(feature = "serde-1")] -impl<N, E, Ty, S> serde::Serialize for GraphMap<N, E, Ty, S> -where - Ty: EdgeType, - N: NodeTrait + serde::Serialize, - E: serde::Serialize, - S: BuildHasher, - Self: Clone, -{ - /// Serializes the given `GraphMap` into the same format as the standard - /// `Graph`. Needs feature `serde-1`. - /// - /// Note: the graph has to be `Clone` for this to work. - fn serialize<Ser>(&self, serializer: Ser) -> Result<Ser::Ok, Ser::Error> - where - Ser: serde::Serializer, - { - let cloned_graph: GraphMap<N, E, Ty, S> = GraphMap::clone(self); - let equivalent_graph: Graph<N, E, Ty, u32> = cloned_graph.into_graph(); - equivalent_graph.serialize(serializer) - } -} - -#[cfg(feature = "serde-1")] -impl<'de, N, E, Ty, S> serde::Deserialize<'de> for GraphMap<N, E, Ty, S> -where - Ty: EdgeType, - N: NodeTrait + serde::Deserialize<'de>, - E: Clone + serde::Deserialize<'de>, - S: BuildHasher + Default, -{ - /// Deserializes into a new `GraphMap` from the same format as the standard - /// `Graph`. Needs feature `serde-1`. - /// - /// **Warning**: When deseralizing a graph that was not originally a `GraphMap`, - /// the restrictions from [`from_graph`](#method.from_graph) apply. - /// - /// Note: The edge weights have to be `Clone` for this to work. - fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> - where - D: serde::Deserializer<'de>, - { - let equivalent_graph: Graph<N, E, Ty, u32> = Graph::deserialize(deserializer)?; - Ok(GraphMap::from_graph(equivalent_graph)) - } -} - -impl<N, E, Ty, S> GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - /// Create a new `GraphMap` - pub fn new() -> Self - where - S: Default, - { - Self::default() - } - - /// Create a new `GraphMap` with estimated capacity. - pub fn with_capacity(nodes: usize, edges: usize) -> Self - where - S: Default, - { - Self { - nodes: IndexMap::with_capacity_and_hasher(nodes, S::default()), - edges: IndexMap::with_capacity_and_hasher(edges, S::default()), - ty: PhantomData, - } - } - - /// Create a new `GraphMap` with estimated capacity, and specified hasher. - pub fn with_capacity_and_hasher(nodes: usize, edges: usize, hasher: S) -> Self - where - S: Clone, - { - Self { - nodes: IndexMap::with_capacity_and_hasher(nodes, hasher.clone()), - edges: IndexMap::with_capacity_and_hasher(edges, hasher), - ty: PhantomData, - } - } - - /// Return the current node and edge capacity of the graph. - pub fn capacity(&self) -> (usize, usize) { - (self.nodes.capacity(), self.edges.capacity()) - } - - /// Use their natural order to map the node pair (a, b) to a canonical edge id. - #[inline] - fn edge_key(a: N, b: N) -> (N, N) { - if Ty::is_directed() || a <= b { - (a, b) - } else { - (b, a) - } - } - - /// Whether the graph has directed edges. - pub fn is_directed(&self) -> bool { - Ty::is_directed() - } - - /// Create a new `GraphMap` from an iterable of edges. - /// - /// Node values are taken directly from the list. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - /// - /// ``` - /// use petgraph::graphmap::UnGraphMap; - /// - /// // Create a new undirected GraphMap. - /// // Use a type hint to have `()` be the edge weight type. - /// let gr = UnGraphMap::<_, ()>::from_edges(&[ - /// (0, 1), (0, 2), (0, 3), - /// (1, 2), (1, 3), - /// (2, 3), - /// ]); - /// ``` - pub fn from_edges<I>(iterable: I) -> Self - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E, NodeId = N>, - S: Default, - { - Self::from_iter(iterable) - } - - /// Return the number of nodes in the graph. - pub fn node_count(&self) -> usize { - self.nodes.len() - } - - /// Return the number of edges in the graph. - pub fn edge_count(&self) -> usize { - self.edges.len() - } - - /// Remove all nodes and edges - pub fn clear(&mut self) { - self.nodes.clear(); - self.edges.clear(); - } - - /// Add node `n` to the graph. - pub fn add_node(&mut self, n: N) -> N { - self.nodes.entry(n).or_default(); - n - } - - /// Return `true` if node `n` was removed. - /// - /// Computes in **O(V)** time, due to the removal of edges with other nodes. - pub fn remove_node(&mut self, n: N) -> bool { - let links = match self.nodes.swap_remove(&n) { - None => return false, - Some(sus) => sus, - }; - for (succ, dir) in links { - let edge = if dir == CompactDirection::Outgoing { - Self::edge_key(n, succ) - } else { - Self::edge_key(succ, n) - }; - // remove all successor links - self.remove_single_edge(&succ, &n, dir.opposite()); - // Remove all edge values - self.edges.swap_remove(&edge); - } - true - } - - /// Return `true` if the node is contained in the graph. - pub fn contains_node(&self, n: N) -> bool { - self.nodes.contains_key(&n) - } - - /// Add an edge connecting `a` and `b` to the graph, with associated - /// data `weight`. For a directed graph, the edge is directed from `a` - /// to `b`. - /// - /// Inserts nodes `a` and/or `b` if they aren't already part of the graph. - /// - /// Return `None` if the edge did not previously exist, otherwise, - /// the associated data is updated and the old value is returned - /// as `Some(old_weight)`. - /// - /// ``` - /// // Create a GraphMap with directed edges, and add one edge to it - /// use petgraph::graphmap::DiGraphMap; - /// - /// let mut g = DiGraphMap::new(); - /// g.add_edge("x", "y", -1); - /// assert_eq!(g.node_count(), 2); - /// assert_eq!(g.edge_count(), 1); - /// assert!(g.contains_edge("x", "y")); - /// assert!(!g.contains_edge("y", "x")); - /// ``` - pub fn add_edge(&mut self, a: N, b: N, weight: E) -> Option<E> { - if let old @ Some(_) = self.edges.insert(Self::edge_key(a, b), weight) { - old - } else { - // insert in the adjacency list if it's a new edge - self.nodes - .entry(a) - .or_insert_with(|| Vec::with_capacity(1)) - .push((b, CompactDirection::Outgoing)); - if a != b { - // self loops don't have the Incoming entry - self.nodes - .entry(b) - .or_insert_with(|| Vec::with_capacity(1)) - .push((a, CompactDirection::Incoming)); - } - None - } - } - - /// Remove edge relation from a to b - /// - /// Return `true` if it did exist. - fn remove_single_edge(&mut self, a: &N, b: &N, dir: CompactDirection) -> bool { - match self.nodes.get_mut(a) { - None => false, - Some(sus) => { - if Ty::is_directed() { - match sus.iter().position(|elt| elt == &(*b, dir)) { - Some(index) => { - sus.swap_remove(index); - true - } - None => false, - } - } else { - match sus.iter().position(|elt| &elt.0 == b) { - Some(index) => { - sus.swap_remove(index); - true - } - None => false, - } - } - } - } - } - - /// Remove edge from `a` to `b` from the graph and return the edge weight. - /// - /// Return `None` if the edge didn't exist. - /// - /// ``` - /// // Create a GraphMap with undirected edges, and add and remove an edge. - /// use petgraph::graphmap::UnGraphMap; - /// - /// let mut g = UnGraphMap::new(); - /// g.add_edge("x", "y", -1); - /// - /// let edge_data = g.remove_edge("y", "x"); - /// assert_eq!(edge_data, Some(-1)); - /// assert_eq!(g.edge_count(), 0); - /// ``` - pub fn remove_edge(&mut self, a: N, b: N) -> Option<E> { - let exist1 = self.remove_single_edge(&a, &b, CompactDirection::Outgoing); - let exist2 = if a != b { - self.remove_single_edge(&b, &a, CompactDirection::Incoming) - } else { - exist1 - }; - let weight = self.edges.swap_remove(&Self::edge_key(a, b)); - debug_assert!(exist1 == exist2 && exist1 == weight.is_some()); - weight - } - - /// Return `true` if the edge connecting `a` with `b` is contained in the graph. - pub fn contains_edge(&self, a: N, b: N) -> bool { - self.edges.contains_key(&Self::edge_key(a, b)) - } - - /// Return an iterator over the nodes of the graph. - /// - /// Iterator element type is `N`. - pub fn nodes(&self) -> Nodes<'_, N> { - Nodes { - iter: self.nodes.keys().copied(), - } - } - - /// Return a parallel iterator over the nodes of the graph. - /// - /// Iterator element type is `N`. - #[cfg(feature = "rayon")] - pub fn par_nodes(&self) -> ParNodes<'_, N> - where - N: Send + Sync, - { - ParNodes { - iter: self.nodes.par_keys(), - } - } - - /// Return an iterator of all nodes with an edge starting from `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `N`. - pub fn neighbors(&self, a: N) -> Neighbors<N, Ty> { - Neighbors { - iter: match self.nodes.get(&a) { - Some(neigh) => neigh.iter(), - None => [].iter(), - }, - ty: self.ty, - } - } - - /// Return an iterator of all neighbors that have an edge between them and - /// `a`, in the specified direction. - /// If the graph's edges are undirected, this is equivalent to *.neighbors(a)*. - /// - /// - `Directed`, `Outgoing`: All edges from `a`. - /// - `Directed`, `Incoming`: All edges to `a`. - /// - `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `N`. - pub fn neighbors_directed(&self, a: N, dir: Direction) -> NeighborsDirected<N, Ty> { - NeighborsDirected { - iter: match self.nodes.get(&a) { - Some(neigh) => neigh.iter(), - None => [].iter(), - }, - start_node: a, - dir, - ty: self.ty, - } - } - - /// Return an iterator of target nodes with an edge starting from `a`, - /// paired with their respective edge weights. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `(N, N, &E)`. - pub fn edges(&self, a: N) -> Edges<N, E, Ty, S> { - Edges { - from: a, - iter: self.neighbors(a), - edges: &self.edges, - } - } - - /// Return an iterator of target nodes with an edge starting from `a`, - /// paired with their respective edge weights. - /// - /// - `Directed`, `Outgoing`: All edges from `a`. - /// - `Directed`, `Incoming`: All edges to `a`. - /// - `Undirected`, `Outgoing`: All edges connected to `a`, with `a` being the source of each - /// edge. - /// - `Undirected`, `Incoming`: All edges connected to `a`, with `a` being the target of each - /// edge. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `(N, N, &E)`. - pub fn edges_directed(&self, a: N, dir: Direction) -> EdgesDirected<N, E, Ty, S> { - EdgesDirected { - from: a, - iter: self.neighbors_directed(a, dir), - dir, - edges: &self.edges, - } - } - - /// Return a reference to the edge weight connecting `a` with `b`, or - /// `None` if the edge does not exist in the graph. - pub fn edge_weight(&self, a: N, b: N) -> Option<&E> { - self.edges.get(&Self::edge_key(a, b)) - } - - /// Return a mutable reference to the edge weight connecting `a` with `b`, or - /// `None` if the edge does not exist in the graph. - pub fn edge_weight_mut(&mut self, a: N, b: N) -> Option<&mut E> { - self.edges.get_mut(&Self::edge_key(a, b)) - } - - /// Return an iterator over all edges of the graph with their weight in arbitrary order. - /// - /// Iterator element type is `(N, N, &E)` - pub fn all_edges(&self) -> AllEdges<N, E, Ty> { - AllEdges { - inner: self.edges.iter(), - ty: self.ty, - } - } - - /// Return an iterator over all edges of the graph in arbitrary order, with a mutable reference - /// to their weight. - /// - /// Iterator element type is `(N, N, &mut E)` - pub fn all_edges_mut(&mut self) -> AllEdgesMut<N, E, Ty> { - AllEdgesMut { - inner: self.edges.iter_mut(), - ty: self.ty, - } - } - - /// Return a parallel iterator over all edges of the graph with their weight in arbitrary - /// order. - /// - /// Iterator element type is `(N, N, &E)` - #[cfg(feature = "rayon")] - pub fn par_all_edges(&self) -> ParAllEdges<N, E, Ty> - where - N: Send + Sync, - E: Sync, - { - ParAllEdges { - inner: self.edges.par_iter(), - ty: PhantomData, - } - } - - /// Return a parallel iterator over all edges of the graph in arbitrary order, with a mutable - /// reference to their weight. - /// - /// Iterator element type is `(N, N, &mut E)` - #[cfg(feature = "rayon")] - pub fn par_all_edges_mut(&mut self) -> ParAllEdgesMut<N, E, Ty> - where - N: Send + Sync, - E: Send, - { - ParAllEdgesMut { - inner: self.edges.par_iter_mut(), - ty: PhantomData, - } - } - - /// Return a `Graph` that corresponds to this `GraphMap`. - /// - /// 1. Note that node and edge indices in the `Graph` have nothing in common - /// with the `GraphMap`s node weights `N`. The node weights `N` are used as - /// node weights in the resulting `Graph`, too. - /// 2. Note that the index type is user-chosen. - /// - /// Computes in **O(|V| + |E|)** time (average). - /// - /// **Panics** if the number of nodes or edges does not fit with - /// the resulting graph's index type. - pub fn into_graph<Ix>(self) -> Graph<N, E, Ty, Ix> - where - Ix: crate::graph::IndexType, - { - // assuming two successive iterations of the same hashmap produce the same order - let mut gr = Graph::with_capacity(self.node_count(), self.edge_count()); - for (&node, _) in &self.nodes { - gr.add_node(node); - } - for ((a, b), edge_weight) in self.edges { - let ai = self.nodes.get_index_of(&a).unwrap(); - let bi = self.nodes.get_index_of(&b).unwrap(); - gr.add_edge(node_index(ai), node_index(bi), edge_weight); - } - gr - } - - /// Creates a `GraphMap` that corresponds to the given `Graph`. - /// - /// **Warning**: Nodes with the same weight are merged and only the last parallel edge - /// is kept. Node and edge indices of the `Graph` are lost. Only use this function - /// if the node weights are distinct and there are no parallel edges. - /// - /// Computes in **O(|V| + |E|)** time (average). - pub fn from_graph<Ix>(graph: Graph<N, E, Ty, Ix>) -> Self - where - Ix: crate::graph::IndexType, - E: Clone, - S: Default, - { - let mut new_graph: GraphMap<N, E, Ty, S> = - GraphMap::with_capacity(graph.node_count(), graph.edge_count()); - - for node in graph.raw_nodes() { - new_graph.add_node(node.weight); - } - - for edge in graph.edge_indices() { - let (a, b) = graph.edge_endpoints(edge).unwrap(); - new_graph.add_edge( - *graph.node_weight(a).unwrap(), - *graph.node_weight(b).unwrap(), - graph.edge_weight(edge).unwrap().clone(), - ); - } - - new_graph - } -} - -/// Create a new `GraphMap` from an iterable of edges. -impl<N, E, Ty, Item, S> FromIterator<Item> for GraphMap<N, E, Ty, S> -where - Item: IntoWeightedEdge<E, NodeId = N>, - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher + Default, -{ - fn from_iter<I>(iterable: I) -> Self - where - I: IntoIterator<Item = Item>, - { - let iter = iterable.into_iter(); - let (low, _) = iter.size_hint(); - let mut g = Self::with_capacity(0, low); - g.extend(iter); - g - } -} - -/// Extend the graph from an iterable of edges. -/// -/// Nodes are inserted automatically to match the edges. -impl<N, E, Ty, Item, S> Extend<Item> for GraphMap<N, E, Ty, S> -where - Item: IntoWeightedEdge<E, NodeId = N>, - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - fn extend<I>(&mut self, iterable: I) - where - I: IntoIterator<Item = Item>, - { - let iter = iterable.into_iter(); - let (low, _) = iter.size_hint(); - self.edges.reserve(low); - - for elt in iter { - let (source, target, weight) = elt.into_weighted_edge(); - self.add_edge(source, target, weight); - } - } -} - -iterator_wrap! { - impl (Iterator DoubleEndedIterator ExactSizeIterator) for - #[derive(Debug, Clone)] - struct Nodes <'a, N> where { N: 'a + NodeTrait } - item: N, - iter: Copied<Keys<'a, N, Vec<(N, CompactDirection)>>>, -} - -#[derive(Debug, Clone)] -pub struct Neighbors<'a, N, Ty = Undirected> -where - N: 'a, - Ty: EdgeType, -{ - iter: Iter<'a, (N, CompactDirection)>, - ty: PhantomData<Ty>, -} - -impl<N, Ty> Iterator for Neighbors<'_, N, Ty> -where - N: NodeTrait, - Ty: EdgeType, -{ - type Item = N; - fn next(&mut self) -> Option<N> { - if Ty::is_directed() { - (&mut self.iter) - .filter_map(|&(n, dir)| if dir == Outgoing { Some(n) } else { None }) - .next() - } else { - self.iter.next().map(|&(n, _)| n) - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (lower, upper) = self.iter.size_hint(); - if Ty::is_directed() { - (0, upper) - } else { - (lower, upper) - } - } -} - -#[derive(Debug, Clone)] -pub struct NeighborsDirected<'a, N, Ty> -where - N: 'a, - Ty: EdgeType, -{ - iter: Iter<'a, (N, CompactDirection)>, - start_node: N, - dir: Direction, - ty: PhantomData<Ty>, -} - -impl<N, Ty> Iterator for NeighborsDirected<'_, N, Ty> -where - N: NodeTrait, - Ty: EdgeType, -{ - type Item = N; - fn next(&mut self) -> Option<N> { - if Ty::is_directed() { - let self_dir = self.dir; - let start_node = self.start_node; - (&mut self.iter) - .filter_map(move |&(n, dir)| { - if dir == self_dir || n == start_node { - Some(n) - } else { - None - } - }) - .next() - } else { - self.iter.next().map(|&(n, _)| n) - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (lower, upper) = self.iter.size_hint(); - if Ty::is_directed() { - (0, upper) - } else { - (lower, upper) - } - } -} - -#[derive(Debug, Clone)] -pub struct Edges<'a, N, E: 'a, Ty, S = RandomState> -where - N: 'a + NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - from: N, - edges: &'a IndexMap<(N, N), E, S>, - iter: Neighbors<'a, N, Ty>, -} - -impl<'a, N, E, Ty, S> Iterator for Edges<'a, N, E, Ty, S> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, - S: BuildHasher, -{ - type Item = (N, N, &'a E); - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(|b| { - let a = self.from; - match self.edges.get(&GraphMap::<N, E, Ty>::edge_key(a, b)) { - None => unreachable!(), - Some(edge) => (a, b, edge), - } - }) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -#[derive(Debug, Clone)] -pub struct EdgesDirected<'a, N, E: 'a, Ty, S = RandomState> -where - N: 'a + NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - from: N, - dir: Direction, - edges: &'a IndexMap<(N, N), E, S>, - iter: NeighborsDirected<'a, N, Ty>, -} - -impl<'a, N, E, Ty, S> Iterator for EdgesDirected<'a, N, E, Ty, S> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, - S: BuildHasher, -{ - type Item = (N, N, &'a E); - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(|mut b| { - let mut a = self.from; - if self.dir == Direction::Incoming { - mem::swap(&mut a, &mut b); - } - match self.edges.get(&GraphMap::<N, E, Ty>::edge_key(a, b)) { - None => unreachable!(), - Some(edge) => (a, b, edge), - } - }) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -#[derive(Debug, Clone)] -pub struct AllEdges<'a, N, E: 'a, Ty> -where - N: 'a + NodeTrait, -{ - inner: IndexMapIter<'a, (N, N), E>, - ty: PhantomData<Ty>, -} - -impl<'a, N, E, Ty> Iterator for AllEdges<'a, N, E, Ty> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, -{ - type Item = (N, N, &'a E); - fn next(&mut self) -> Option<Self::Item> { - self.inner.next().map(|(&(a, b), v)| (a, b, v)) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.inner.size_hint() - } - - fn count(self) -> usize { - self.inner.count() - } - - fn nth(&mut self, n: usize) -> Option<Self::Item> { - self.inner - .nth(n) - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } - - fn last(self) -> Option<Self::Item> { - self.inner - .last() - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } -} - -impl<'a, N, E, Ty> DoubleEndedIterator for AllEdges<'a, N, E, Ty> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.inner - .next_back() - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } -} - -pub struct AllEdgesMut<'a, N, E: 'a, Ty> -where - N: 'a + NodeTrait, -{ - inner: IndexMapIterMut<'a, (N, N), E>, // TODO: change to something that implements Debug + Clone? - ty: PhantomData<Ty>, -} - -impl<'a, N, E, Ty> Iterator for AllEdgesMut<'a, N, E, Ty> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, -{ - type Item = (N, N, &'a mut E); - fn next(&mut self) -> Option<Self::Item> { - self.inner - .next() - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } - - fn size_hint(&self) -> (usize, Option<usize>) { - self.inner.size_hint() - } - - fn count(self) -> usize { - self.inner.count() - } - - fn nth(&mut self, n: usize) -> Option<Self::Item> { - self.inner - .nth(n) - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } - - fn last(self) -> Option<Self::Item> { - self.inner - .last() - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } -} - -impl<'a, N, E, Ty> DoubleEndedIterator for AllEdgesMut<'a, N, E, Ty> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, -{ - fn next_back(&mut self) -> Option<Self::Item> { - self.inner - .next_back() - .map(|(&(n1, n2), weight)| (n1, n2, weight)) - } -} - -/// Index `GraphMap` by node pairs to access edge weights. -impl<N, E, Ty, S> Index<(N, N)> for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type Output = E; - fn index(&self, index: (N, N)) -> &E { - let index = Self::edge_key(index.0, index.1); - self.edge_weight(index.0, index.1) - .expect("GraphMap::index: no such edge") - } -} - -/// Index `GraphMap` by node pairs to access edge weights. -impl<N, E, Ty, S> IndexMut<(N, N)> for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - fn index_mut(&mut self, index: (N, N)) -> &mut E { - let index = Self::edge_key(index.0, index.1); - self.edge_weight_mut(index.0, index.1) - .expect("GraphMap::index: no such edge") - } -} - -/// Create a new empty `GraphMap`. -impl<N, E, Ty, S> Default for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher + Default, -{ - fn default() -> Self { - GraphMap::with_capacity(0, 0) - } -} - -/// A reference that is hashed and compared by its pointer value. -/// -/// `Ptr` is used for certain configurations of `GraphMap`, -/// in particular in the combination where the node type for -/// `GraphMap` is something of type for example `Ptr(&Cell<T>)`, -/// with the `Cell<T>` being `TypedArena` allocated. -pub struct Ptr<'b, T: 'b>(pub &'b T); - -impl<T> Copy for Ptr<'_, T> {} -impl<T> Clone for Ptr<'_, T> { - fn clone(&self) -> Self { - *self - } -} - -fn ptr_eq<T>(a: *const T, b: *const T) -> bool { - a == b -} - -impl<'b, T> PartialEq for Ptr<'b, T> { - /// Ptr compares by pointer equality, i.e if they point to the same value - fn eq(&self, other: &Ptr<'b, T>) -> bool { - ptr_eq(self.0, other.0) - } -} - -impl<'b, T> PartialOrd for Ptr<'b, T> { - fn partial_cmp(&self, other: &Ptr<'b, T>) -> Option<Ordering> { - Some(self.cmp(other)) - } -} - -impl<'b, T> Ord for Ptr<'b, T> { - /// Ptr is ordered by pointer value, i.e. an arbitrary but stable and total order. - fn cmp(&self, other: &Ptr<'b, T>) -> Ordering { - let a: *const T = self.0; - let b: *const T = other.0; - a.cmp(&b) - } -} - -impl<T> Deref for Ptr<'_, T> { - type Target = T; - fn deref(&self) -> &T { - self.0 - } -} - -impl<T> Eq for Ptr<'_, T> {} - -impl<T> Hash for Ptr<'_, T> { - fn hash<H: hash::Hasher>(&self, st: &mut H) { - let ptr = (self.0) as *const T; - ptr.hash(st) - } -} - -impl<T: fmt::Debug> fmt::Debug for Ptr<'_, T> { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.0.fmt(f) - } -} - -#[derive(Debug, Clone)] -pub struct NodeIdentifiers<'a, N, E: 'a, Ty> -where - N: 'a + NodeTrait, -{ - iter: IndexMapIter<'a, N, Vec<(N, CompactDirection)>>, - ty: PhantomData<Ty>, - edge_ty: PhantomData<E>, -} - -impl<'a, N, E, Ty> Iterator for NodeIdentifiers<'a, N, E, Ty> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, -{ - type Item = N; - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(|(&n, _)| n) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -#[derive(Debug, Clone)] -pub struct NodeReferences<'a, N, E: 'a, Ty> -where - N: 'a + NodeTrait, -{ - iter: IndexMapIter<'a, N, Vec<(N, CompactDirection)>>, - ty: PhantomData<Ty>, - edge_ty: PhantomData<E>, -} - -impl<'a, N, E, Ty> Iterator for NodeReferences<'a, N, E, Ty> -where - N: 'a + NodeTrait, - E: 'a, - Ty: EdgeType, -{ - type Item = (N, &'a N); - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(|(n, _)| (*n, n)) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -impl<N, E, Ty, S> visit::GraphBase for GraphMap<N, E, Ty, S> -where - N: Copy + PartialEq, - S: BuildHasher, -{ - type NodeId = N; - type EdgeId = (N, N); -} - -impl<N, E, Ty, S> visit::Data for GraphMap<N, E, Ty, S> -where - N: Copy + PartialEq, - Ty: EdgeType, - S: BuildHasher, -{ - type NodeWeight = N; - type EdgeWeight = E; -} - -impl<N, E, Ty, S> visit::Visitable for GraphMap<N, E, Ty, S> -where - N: Copy + Ord + Hash, - Ty: EdgeType, - S: BuildHasher, -{ - type Map = HashSet<N>; - fn visit_map(&self) -> HashSet<N> { - HashSet::with_capacity(self.node_count()) - } - fn reset_map(&self, map: &mut Self::Map) { - map.clear(); - } -} - -impl<N, E, Ty, S> visit::GraphProp for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type EdgeType = Ty; -} - -impl<'a, N, E, Ty, S> visit::IntoNodeReferences for &'a GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type NodeRef = (N, &'a N); - type NodeReferences = NodeReferences<'a, N, E, Ty>; - fn node_references(self) -> Self::NodeReferences { - NodeReferences { - iter: self.nodes.iter(), - ty: self.ty, - edge_ty: PhantomData, - } - } -} - -impl<'a, N, E: 'a, Ty, S> visit::IntoNodeIdentifiers for &'a GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type NodeIdentifiers = NodeIdentifiers<'a, N, E, Ty>; - - fn node_identifiers(self) -> Self::NodeIdentifiers { - NodeIdentifiers { - iter: self.nodes.iter(), - ty: self.ty, - edge_ty: PhantomData, - } - } -} - -impl<N, E, Ty, S> visit::NodeCount for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - fn node_count(&self) -> usize { - (*self).node_count() - } -} - -impl<N, E, Ty, S> visit::NodeIndexable for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - fn node_bound(&self) -> usize { - self.node_count() - } - fn to_index(&self, ix: Self::NodeId) -> usize { - self.nodes.get_index_of(&ix).unwrap() - } - fn from_index(&self, ix: usize) -> Self::NodeId { - assert!( - ix < self.nodes.len(), - "The requested index {} is out-of-bounds.", - ix - ); - let (&key, _) = self.nodes.get_index(ix).unwrap(); - key - } -} - -impl<N, E, Ty, S> visit::NodeCompactIndexable for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ -} - -impl<'a, N: 'a, E, Ty, S> visit::IntoNeighbors for &'a GraphMap<N, E, Ty, S> -where - N: Copy + Ord + Hash, - Ty: EdgeType, - S: BuildHasher, -{ - type Neighbors = Neighbors<'a, N, Ty>; - fn neighbors(self, n: Self::NodeId) -> Self::Neighbors { - self.neighbors(n) - } -} - -impl<'a, N: 'a, E, Ty, S> visit::IntoNeighborsDirected for &'a GraphMap<N, E, Ty, S> -where - N: Copy + Ord + Hash, - Ty: EdgeType, - S: BuildHasher, -{ - type NeighborsDirected = NeighborsDirected<'a, N, Ty>; - fn neighbors_directed(self, n: N, dir: Direction) -> Self::NeighborsDirected { - self.neighbors_directed(n, dir) - } -} - -impl<N, E, Ty, S> visit::EdgeIndexable for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - fn edge_bound(&self) -> usize { - self.edge_count() - } - - fn to_index(&self, ix: Self::EdgeId) -> usize { - self.edges.get_index_of(&ix).unwrap() - } - - fn from_index(&self, ix: usize) -> Self::EdgeId { - assert!( - ix < self.edges.len(), - "The requested index {} is out-of-bounds.", - ix - ); - let (&key, _) = self.edges.get_index(ix).unwrap(); - key - } -} - -impl<'a, N: 'a, E: 'a, Ty, S> visit::IntoEdges for &'a GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type Edges = Edges<'a, N, E, Ty, S>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - self.edges(a) - } -} - -impl<'a, N: 'a, E: 'a, Ty, S> visit::IntoEdgesDirected for &'a GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type EdgesDirected = EdgesDirected<'a, N, E, Ty, S>; - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::EdgesDirected { - self.edges_directed(a, dir) - } -} - -impl<'a, N: 'a, E: 'a, Ty, S> visit::IntoEdgeReferences for &'a GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - type EdgeRef = (N, N, &'a E); - type EdgeReferences = AllEdges<'a, N, E, Ty>; - fn edge_references(self) -> Self::EdgeReferences { - self.all_edges() - } -} - -impl<N, E, Ty, S> visit::EdgeCount for GraphMap<N, E, Ty, S> -where - N: NodeTrait, - Ty: EdgeType, - S: BuildHasher, -{ - #[inline] - fn edge_count(&self) -> usize { - self.edge_count() - } -} - -/// The `GraphMap` keeps an adjacency matrix internally. -impl<N, E, Ty, S> visit::GetAdjacencyMatrix for GraphMap<N, E, Ty, S> -where - N: Copy + Ord + Hash, - Ty: EdgeType, - S: BuildHasher, -{ - type AdjMatrix = (); - #[inline] - fn adjacency_matrix(&self) {} - #[inline] - fn is_adjacent(&self, _: &(), a: N, b: N) -> bool { - self.contains_edge(a, b) - } -} - -/// A [ParallelIterator] over this graph's nodes. -#[cfg(feature = "rayon")] -pub struct ParNodes<'a, N> -where - N: NodeTrait + Send + Sync, -{ - iter: ParKeys<'a, N, Vec<(N, CompactDirection)>>, -} - -#[cfg(feature = "rayon")] -impl<'a, N> ParallelIterator for ParNodes<'a, N> -where - N: NodeTrait + Send + Sync, -{ - type Item = N; - - fn drive_unindexed<C>(self, consumer: C) -> C::Result - where - C: rayon::iter::plumbing::UnindexedConsumer<Self::Item>, - { - self.iter.copied().drive_unindexed(consumer) - } - - fn opt_len(&self) -> Option<usize> { - self.iter.opt_len() - } -} - -#[cfg(feature = "rayon")] -impl<'a, N> IndexedParallelIterator for ParNodes<'a, N> -where - N: NodeTrait + Send + Sync, -{ - fn drive<C>(self, consumer: C) -> C::Result - where - C: rayon::iter::plumbing::Consumer<Self::Item>, - { - self.iter.copied().drive(consumer) - } - - fn len(&self) -> usize { - self.iter.len() - } - - fn with_producer<CB>(self, callback: CB) -> CB::Output - where - CB: rayon::iter::plumbing::ProducerCallback<Self::Item>, - { - self.iter.copied().with_producer(callback) - } -} - -/// A [ParallelIterator] over this graph's edges. -#[cfg(feature = "rayon")] -pub struct ParAllEdges<'a, N, E, Ty> -where - N: NodeTrait + Send + Sync, - E: Sync, -{ - inner: ParIter<'a, (N, N), E>, - ty: PhantomData<fn(Ty)>, -} - -#[cfg(feature = "rayon")] -impl<'a, N, E, Ty> ParallelIterator for ParAllEdges<'a, N, E, Ty> -where - N: NodeTrait + Send + Sync, - E: Sync, -{ - type Item = (N, N, &'a E); - - fn drive_unindexed<C>(self, c: C) -> C::Result - where - C: rayon::iter::plumbing::UnindexedConsumer<Self::Item>, - { - self.inner.map(|(&(a, b), v)| (a, b, v)).drive_unindexed(c) - } - - fn opt_len(&self) -> Option<usize> { - self.inner.opt_len() - } -} - -#[cfg(feature = "rayon")] -impl<'a, N, E, Ty> IndexedParallelIterator for ParAllEdges<'a, N, E, Ty> -where - N: NodeTrait + Send + Sync, - E: Sync, -{ - fn drive<C>(self, consumer: C) -> C::Result - where - C: rayon::iter::plumbing::Consumer<Self::Item>, - { - self.inner.map(|(&(a, b), v)| (a, b, v)).drive(consumer) - } - - fn len(&self) -> usize { - self.inner.len() - } - - fn with_producer<CB>(self, callback: CB) -> CB::Output - where - CB: rayon::iter::plumbing::ProducerCallback<Self::Item>, - { - self.inner - .map(|(&(a, b), v)| (a, b, v)) - .with_producer(callback) - } -} - -/// A [ParallelIterator] over this graph's edges by mutable reference. -#[cfg(feature = "rayon")] -pub struct ParAllEdgesMut<'a, N, E: 'a, Ty> -where - N: NodeTrait + Send + Sync, - E: Send, -{ - inner: ParIterMut<'a, (N, N), E>, - ty: PhantomData<fn(Ty)>, -} - -#[cfg(feature = "rayon")] -impl<'a, N, E, Ty> ParallelIterator for ParAllEdgesMut<'a, N, E, Ty> -where - N: NodeTrait + Send + Sync, - E: Send, -{ - type Item = (N, N, &'a mut E); - - fn drive_unindexed<C>(self, c: C) -> C::Result - where - C: rayon::iter::plumbing::UnindexedConsumer<Self::Item>, - { - self.inner.map(|(&(a, b), v)| (a, b, v)).drive_unindexed(c) - } - - fn opt_len(&self) -> Option<usize> { - self.inner.opt_len() - } -} - -#[cfg(feature = "rayon")] -impl<'a, N, E, Ty> IndexedParallelIterator for ParAllEdgesMut<'a, N, E, Ty> -where - N: NodeTrait + Send + Sync, - E: Send, -{ - fn drive<C>(self, consumer: C) -> C::Result - where - C: rayon::iter::plumbing::Consumer<Self::Item>, - { - self.inner.map(|(&(a, b), v)| (a, b, v)).drive(consumer) - } - - fn len(&self) -> usize { - self.inner.len() - } - - fn with_producer<CB>(self, callback: CB) -> CB::Output - where - CB: rayon::iter::plumbing::ProducerCallback<Self::Item>, - { - self.inner - .map(|(&(a, b), v)| (a, b, v)) - .with_producer(callback) - } -} diff --git a/vendor/petgraph/src/iter_format.rs b/vendor/petgraph/src/iter_format.rs deleted file mode 100644 index c882b1e7..00000000 --- a/vendor/petgraph/src/iter_format.rs +++ /dev/null @@ -1,102 +0,0 @@ -//! Formatting utils - -use std::cell::RefCell; -use std::fmt; - -/// Format the iterator like a map -pub struct DebugMap<F>(pub F); - -impl<F, I, K, V> fmt::Debug for DebugMap<F> -where - F: Fn() -> I, - I: IntoIterator<Item = (K, V)>, - K: fmt::Debug, - V: fmt::Debug, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - f.debug_map().entries((self.0)()).finish() - } -} - -/// Avoid "pretty" debug -pub struct NoPretty<T>(pub T); - -impl<T> fmt::Debug for NoPretty<T> -where - T: fmt::Debug, -{ - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - write!(f, "{:?}", self.0) - } -} - -/// Format all iterator elements lazily, separated by `sep`. -/// -/// The format value can only be formatted once, after that the iterator is -/// exhausted. -/// -/// See [`.format()`](../trait.Itertools.html#method.format) -/// for more information. -#[derive(Clone)] -pub struct Format<'a, I> { - sep: &'a str, - /// Format uses interior mutability because Display::fmt takes &self. - inner: RefCell<Option<I>>, -} - -pub trait IterFormatExt: Iterator { - fn format(self, separator: &str) -> Format<Self> - where - Self: Sized, - { - Format { - sep: separator, - inner: RefCell::new(Some(self)), - } - } -} - -impl<I> IterFormatExt for I where I: Iterator {} - -impl<I> Format<'_, I> -where - I: Iterator, -{ - fn format<F>(&self, f: &mut fmt::Formatter, mut cb: F) -> fmt::Result - where - F: FnMut(&I::Item, &mut fmt::Formatter) -> fmt::Result, - { - let mut iter = match self.inner.borrow_mut().take() { - Some(t) => t, - None => panic!("Format: was already formatted once"), - }; - - if let Some(fst) = iter.next() { - cb(&fst, f)?; - for elt in iter { - if !self.sep.is_empty() { - f.write_str(self.sep)?; - } - cb(&elt, f)?; - } - } - Ok(()) - } -} - -macro_rules! impl_format { - ($($fmt_trait:ident)*) => { - $( - impl<'a, I> fmt::$fmt_trait for Format<'a, I> - where I: Iterator, - I::Item: fmt::$fmt_trait, - { - fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { - self.format(f, fmt::$fmt_trait::fmt) - } - } - )* - } -} - -impl_format!(Debug); diff --git a/vendor/petgraph/src/iter_utils.rs b/vendor/petgraph/src/iter_utils.rs deleted file mode 100644 index 587af84c..00000000 --- a/vendor/petgraph/src/iter_utils.rs +++ /dev/null @@ -1,32 +0,0 @@ -pub trait IterUtilsExt: Iterator { - /// Return the first element that maps to `Some(_)`, or None if the iterator - /// was exhausted. - fn ex_find_map<F, R>(&mut self, mut f: F) -> Option<R> - where - F: FnMut(Self::Item) -> Option<R>, - { - for elt in self { - if let result @ Some(_) = f(elt) { - return result; - } - } - None - } - - /// Return the last element from the back that maps to `Some(_)`, or - /// None if the iterator was exhausted. - fn ex_rfind_map<F, R>(&mut self, mut f: F) -> Option<R> - where - F: FnMut(Self::Item) -> Option<R>, - Self: DoubleEndedIterator, - { - while let Some(elt) = self.next_back() { - if let result @ Some(_) = f(elt) { - return result; - } - } - None - } -} - -impl<I> IterUtilsExt for I where I: Iterator {} diff --git a/vendor/petgraph/src/lib.rs b/vendor/petgraph/src/lib.rs deleted file mode 100644 index 5b667376..00000000 --- a/vendor/petgraph/src/lib.rs +++ /dev/null @@ -1,305 +0,0 @@ -//! `petgraph` is a graph data structure library. -//! -//! Graphs are collections of nodes, and edges between nodes. `petgraph` -//! provides several [graph types](index.html#graph-types) (each differing in the -//! tradeoffs taken in their internal representation), -//! [algorithms](./algo/index.html#functions) on those graphs, and functionality to -//! [output graphs](./dot/struct.Dot.html) in -//! [`graphviz`](https://www.graphviz.org/) format. Both nodes and edges -//! can have arbitrary associated data, and edges may be either directed or undirected. -//! -//! # Example -//! -//! ```rust -//! use petgraph::graph::{NodeIndex, UnGraph}; -//! use petgraph::algo::{dijkstra, min_spanning_tree}; -//! use petgraph::data::FromElements; -//! use petgraph::dot::{Dot, Config}; -//! -//! // Create an undirected graph with `i32` nodes and edges with `()` associated data. -//! let g = UnGraph::<i32, ()>::from_edges(&[ -//! (1, 2), (2, 3), (3, 4), -//! (1, 4)]); -//! -//! // Find the shortest path from `1` to `4` using `1` as the cost for every edge. -//! let node_map = dijkstra(&g, 1.into(), Some(4.into()), |_| 1); -//! assert_eq!(&1i32, node_map.get(&NodeIndex::new(4)).unwrap()); -//! -//! // Get the minimum spanning tree of the graph as a new graph, and check that -//! // one edge was trimmed. -//! let mst = UnGraph::<_, _>::from_elements(min_spanning_tree(&g)); -//! assert_eq!(g.raw_edges().len() - 1, mst.raw_edges().len()); -//! -//! // Output the tree to `graphviz` `DOT` format -//! println!("{:?}", Dot::with_config(&mst, &[Config::EdgeNoLabel])); -//! // graph { -//! // 0 [label="\"0\""] -//! // 1 [label="\"0\""] -//! // 2 [label="\"0\""] -//! // 3 [label="\"0\""] -//! // 1 -- 2 -//! // 3 -- 4 -//! // 2 -- 3 -//! // } -//! ``` -//! -//! # Graph types -//! -//! * [`Graph`](./graph/struct.Graph.html) - -//! An adjacency list graph with arbitrary associated data. -//! * [`StableGraph`](./stable_graph/struct.StableGraph.html) - -//! Similar to `Graph`, but it keeps indices stable across removals. -//! * [`GraphMap`](./graphmap/struct.GraphMap.html) - -//! An adjacency list graph backed by a hash table. The node identifiers are the keys -//! into the table. -//! * [`MatrixGraph`](./matrix_graph/struct.MatrixGraph.html) - -//! An adjacency matrix graph. -//! * [`CSR`](./csr/struct.Csr.html) - -//! A sparse adjacency matrix graph with arbitrary associated data. -//! -//! ### Generic parameters -//! -//! Each graph type is generic over a handful of parameters. All graphs share 3 common -//! parameters, `N`, `E`, and `Ty`. This is a broad overview of what those are. Each -//! type's documentation will have finer detail on these parameters. -//! -//! `N` & `E` are called *weights* in this implementation, and are associated with -//! nodes and edges respectively. They can generally be of arbitrary type, and don't have to -//! be what you might conventionally consider weight-like. For example, using `&str` for `N` -//! will work. Many algorithms that require costs let you provide a cost function that -//! translates your `N` and `E` weights into costs appropriate to the algorithm. Some graph -//! types and choices do impose bounds on `N` or `E`. -//! [`min_spanning_tree`](./algo/fn.min_spanning_tree.html) for example requires edge weights that -//! implement [`PartialOrd`](https://doc.rust-lang.org/stable/core/cmp/trait.PartialOrd.html). -//! [`GraphMap`](./graphmap/struct.GraphMap.html) requires node weights that can serve as hash -//! map keys, since that graph type does not create standalone node indices. -//! -//! `Ty` controls whether edges are [`Directed`](./enum.Directed.html) or -//! [`Undirected`](./enum.Undirected.html). -//! -//! `Ix` appears on graph types that use indices. It is exposed so you can control -//! the size of node and edge indices, and therefore the memory footprint of your graphs. -//! Allowed values are `u8`, `u16`, `u32`, and `usize`, with `u32` being the default. -//! -//! ### Shorthand types -//! -//! Each graph type vends a few shorthand type definitions that name some specific -//! generic choices. For example, [`DiGraph<_, _>`](./graph/type.DiGraph.html) is shorthand -//! for [`Graph<_, _, Directed>`](graph/struct.Graph.html). -//! [`UnMatrix<_, _>`](./matrix_graph/type.UnMatrix.html) is shorthand for -//! [`MatrixGraph<_, _, Undirected>`](./matrix_graph/struct.MatrixGraph.html). Each graph type's -//! module documentation lists the available shorthand types. -//! -//! # Crate features -//! -//! * **serde-1** - -//! Defaults off. Enables serialization for ``Graph, StableGraph, GraphMap`` using -//! [`serde 1.0`](https://crates.io/crates/serde). May require a more recent version -//! of Rust than petgraph alone. -//! * **graphmap** - -//! Defaults on. Enables [`GraphMap`](./graphmap/struct.GraphMap.html). -//! * **stable_graph** - -//! Defaults on. Enables [`StableGraph`](./stable_graph/struct.StableGraph.html). -//! * **matrix_graph** - -//! Defaults on. Enables [`MatrixGraph`](./matrix_graph/struct.MatrixGraph.html). -//! -#![doc(html_root_url = "https://docs.rs/petgraph/0.4/")] - -extern crate fixedbitset; -#[cfg(feature = "graphmap")] -extern crate indexmap; - -#[cfg(feature = "serde-1")] -extern crate serde; -#[cfg(feature = "serde-1")] -#[macro_use] -extern crate serde_derive; - -#[cfg(all(feature = "serde-1", test))] -extern crate itertools; - -#[doc(no_inline)] -pub use crate::graph::Graph; - -pub use crate::Direction::{Incoming, Outgoing}; - -#[macro_use] -mod macros; -mod scored; - -// these modules define trait-implementing macros -#[macro_use] -pub mod visit; -#[macro_use] -pub mod data; - -pub mod acyclic; -pub mod adj; -pub mod algo; -pub mod csr; -pub mod dot; -#[cfg(feature = "generate")] -pub mod generate; -pub mod graph6; -mod graph_impl; -#[cfg(feature = "graphmap")] -pub mod graphmap; -mod iter_format; -mod iter_utils; -#[cfg(feature = "matrix_graph")] -pub mod matrix_graph; -#[cfg(feature = "quickcheck")] -mod quickcheck; -#[cfg(feature = "serde-1")] -mod serde_utils; -mod traits_graph; -pub mod unionfind; -mod util; - -pub mod operator; -pub mod prelude; - -/// `Graph<N, E, Ty, Ix>` is a graph datastructure using an adjacency list representation. -pub mod graph { - pub use crate::graph_impl::{ - edge_index, node_index, DefaultIx, DiGraph, Edge, EdgeIndex, EdgeIndices, EdgeReference, - EdgeReferences, EdgeWeightsMut, Edges, EdgesConnecting, Externals, Frozen, Graph, - GraphIndex, IndexType, Neighbors, Node, NodeIndex, NodeIndices, NodeReferences, - NodeWeightsMut, UnGraph, WalkNeighbors, - }; -} - -#[cfg(feature = "stable_graph")] -pub use crate::graph_impl::stable_graph; - -// Index into the NodeIndex and EdgeIndex arrays -/// Edge direction. -#[derive(Clone, Copy, Debug, PartialEq, PartialOrd, Ord, Eq, Hash)] -#[repr(usize)] -#[cfg_attr( - feature = "serde-1", - derive(serde_derive::Serialize, serde_derive::Deserialize) -)] -pub enum Direction { - /// An `Outgoing` edge is an outward edge *from* the current node. - Outgoing = 0, - /// An `Incoming` edge is an inbound edge *to* the current node. - Incoming = 1, -} - -impl Direction { - /// Return the opposite `Direction`. - #[inline] - pub fn opposite(self) -> Direction { - match self { - Outgoing => Incoming, - Incoming => Outgoing, - } - } - - /// Return `0` for `Outgoing` and `1` for `Incoming`. - #[inline] - pub fn index(self) -> usize { - (self as usize) & 0x1 - } -} - -#[doc(hidden)] -pub use crate::Direction as EdgeDirection; - -/// Marker type for a directed graph. -#[derive(Clone, Copy, Debug)] -#[cfg_attr( - feature = "serde-1", - derive(serde_derive::Serialize, serde_derive::Deserialize) -)] -pub enum Directed {} - -/// Marker type for an undirected graph. -#[derive(Clone, Copy, Debug)] -#[cfg_attr( - feature = "serde-1", - derive(serde_derive::Serialize, serde_derive::Deserialize) -)] -pub enum Undirected {} - -/// A graph's edge type determines whether it has directed edges or not. -pub trait EdgeType { - fn is_directed() -> bool; -} - -impl EdgeType for Directed { - #[inline] - fn is_directed() -> bool { - true - } -} - -impl EdgeType for Undirected { - #[inline] - fn is_directed() -> bool { - false - } -} - -/// Convert an element like `(i, j)` or `(i, j, w)` into -/// a triple of source, target, edge weight. -/// -/// For `Graph::from_edges` and `GraphMap::from_edges`. -pub trait IntoWeightedEdge<E> { - type NodeId; - fn into_weighted_edge(self) -> (Self::NodeId, Self::NodeId, E); -} - -impl<Ix, E> IntoWeightedEdge<E> for (Ix, Ix) -where - E: Default, -{ - type NodeId = Ix; - - fn into_weighted_edge(self) -> (Ix, Ix, E) { - let (s, t) = self; - (s, t, E::default()) - } -} - -impl<Ix, E> IntoWeightedEdge<E> for (Ix, Ix, E) { - type NodeId = Ix; - fn into_weighted_edge(self) -> (Ix, Ix, E) { - self - } -} - -impl<Ix, E> IntoWeightedEdge<E> for (Ix, Ix, &E) -where - E: Clone, -{ - type NodeId = Ix; - fn into_weighted_edge(self) -> (Ix, Ix, E) { - let (a, b, c) = self; - (a, b, c.clone()) - } -} - -impl<Ix, E> IntoWeightedEdge<E> for &(Ix, Ix) -where - Ix: Copy, - E: Default, -{ - type NodeId = Ix; - fn into_weighted_edge(self) -> (Ix, Ix, E) { - let (s, t) = *self; - (s, t, E::default()) - } -} - -impl<Ix, E> IntoWeightedEdge<E> for &(Ix, Ix, E) -where - Ix: Copy, - E: Clone, -{ - type NodeId = Ix; - fn into_weighted_edge(self) -> (Ix, Ix, E) { - self.clone() - } -} diff --git a/vendor/petgraph/src/macros.rs b/vendor/petgraph/src/macros.rs deleted file mode 100644 index 9ecb9002..00000000 --- a/vendor/petgraph/src/macros.rs +++ /dev/null @@ -1,108 +0,0 @@ -macro_rules! clone_fields { - ($name:ident, $($field:ident),+ $(,)*) => ( - fn clone(&self) -> Self { - $name { - $( - $field : self . $field .clone() - ),* - } - } - ); -} - -macro_rules! iterator_wrap { - (impl () for - struct $name: ident <$($typarm:tt),*> where { $($bounds: tt)* } - item: $item: ty, - iter: $iter: ty, - ) => (); - ( - impl (Iterator $($rest:tt)*) for - $(#[$derive:meta])* - struct $name: ident <$($typarm:tt),*> where { $($bounds: tt)* } - item: $item: ty, - iter: $iter: ty, - ) => ( - // having complex iterator types is kind of the point of this macro - #[allow(clippy::type_complexity)] - $(#[$derive])* - pub struct $name <$($typarm),*> where $($bounds)* { - iter: $iter, - } - impl<$($typarm),*> Iterator for $name <$($typarm),*> - where $($bounds)* - { - type Item = $item; - #[inline] - fn next(&mut self) -> Option<Self::Item> { - self.iter.next() - } - - #[inline] - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } - } - iterator_wrap!( - impl ($($rest)*) for - struct $name <$($typarm),*> where { $($bounds)* } - item: $item, - iter: $iter, - ); - ); - - ( -impl (ExactSizeIterator $($rest:tt)*) for - $(#[$derive:meta])* - struct $name: ident <$($typarm:tt),*> where { $($bounds: tt)* } - item: $item: ty, - iter: $iter: ty, - ) => ( - impl<$($typarm),*> ExactSizeIterator for $name <$($typarm),*> - where $($bounds)* - { - #[inline] - fn len(&self) -> usize { - self.iter.len() - } - } - iterator_wrap!( - impl ($($rest)*) for - $(#[$derive])* - struct $name <$($typarm),*> where { $($bounds)* } - item: $item, - iter: $iter, - ); - ); - - ( -impl (DoubleEndedIterator $($rest:tt)*) for - $(#[$derive:meta])* - struct $name: ident <$($typarm:tt),*> where { $($bounds: tt)* } - item: $item: ty, - iter: $iter: ty, - ) => ( - impl<$($typarm),*> DoubleEndedIterator for $name <$($typarm),*> - where $($bounds)* - { - fn next_back(&mut self) -> Option<Self::Item> { - self.iter.next_back() - } - fn rfold<B, F>(self, accum: B, f: F) -> B - where - F: FnMut(B, Self::Item) -> B, - { self.iter.rfold(accum, f) } - fn rfind<P>(&mut self, predicate: P) -> Option<Self::Item> - where - P: FnMut(&Self::Item) -> bool, - { self.iter.rfind(predicate) } - } - iterator_wrap!( - impl ($($rest)*) for - $(#[$derive])* - struct $name <$($typarm),*> where { $($bounds)* } - item: $item, - iter: $iter, - ); - ); -} diff --git a/vendor/petgraph/src/matrix_graph.rs b/vendor/petgraph/src/matrix_graph.rs deleted file mode 100644 index 2ae7c8d0..00000000 --- a/vendor/petgraph/src/matrix_graph.rs +++ /dev/null @@ -1,1814 +0,0 @@ -//! `MatrixGraph<N, E, Ty, NullN, NullE, Ix>` is a graph datastructure backed by an adjacency matrix. - -use std::marker::PhantomData; -use std::ops::{Index, IndexMut}; - -use std::cmp; -use std::mem; - -use indexmap::IndexSet; - -use fixedbitset::FixedBitSet; - -use crate::{Directed, Direction, EdgeType, IntoWeightedEdge, Outgoing, Undirected}; - -use crate::graph::NodeIndex as GraphNodeIndex; - -use crate::visit::{ - Data, EdgeCount, GetAdjacencyMatrix, GraphBase, GraphProp, IntoEdgeReferences, IntoEdges, - IntoEdgesDirected, IntoNeighbors, IntoNeighborsDirected, IntoNodeIdentifiers, - IntoNodeReferences, NodeCount, NodeIndexable, Visitable, -}; - -use crate::data::Build; - -pub use crate::graph::IndexType; - -// The following types are used to control the max size of the adjacency matrix. Since the maximum -// size of the matrix vector's is the square of the maximum number of nodes, the number of nodes -// should be reasonably picked. -type DefaultIx = u16; - -/// Node identifier. -pub type NodeIndex<Ix = DefaultIx> = GraphNodeIndex<Ix>; - -mod private { - pub trait Sealed {} - - impl<T> Sealed for super::NotZero<T> {} - impl<T> Sealed for Option<T> {} -} - -/// Wrapper trait for an `Option`, allowing user-defined structs to be input as containers when -/// defining a null element. -/// -/// Note: this trait is currently *sealed* and cannot be implemented for types outside this crate. -pub trait Nullable: Default + Into<Option<<Self as Nullable>::Wrapped>> + private::Sealed { - #[doc(hidden)] - type Wrapped; - - #[doc(hidden)] - fn new(value: Self::Wrapped) -> Self; - - #[doc(hidden)] - fn as_ref(&self) -> Option<&Self::Wrapped>; - - #[doc(hidden)] - fn as_mut(&mut self) -> Option<&mut Self::Wrapped>; - - #[doc(hidden)] - fn is_null(&self) -> bool { - self.as_ref().is_none() - } -} - -impl<T> Nullable for Option<T> { - type Wrapped = T; - - fn new(value: T) -> Self { - Some(value) - } - - fn as_ref(&self) -> Option<&Self::Wrapped> { - self.as_ref() - } - - fn as_mut(&mut self) -> Option<&mut Self::Wrapped> { - self.as_mut() - } -} - -/// `NotZero` is used to optimize the memory usage of edge weights `E` in a -/// [`MatrixGraph`](struct.MatrixGraph.html), replacing the default `Option<E>` sentinel. -/// -/// Pre-requisite: edge weight should implement [`Zero`](trait.Zero.html). -/// -/// Note that if you're already using the standard non-zero types (such as `NonZeroU32`), you don't -/// have to use this wrapper and can leave the default `Null` type argument. -pub struct NotZero<T>(T); - -impl<T: Zero> Default for NotZero<T> { - fn default() -> Self { - NotZero(T::zero()) - } -} - -impl<T: Zero> Nullable for NotZero<T> { - #[doc(hidden)] - type Wrapped = T; - - #[doc(hidden)] - fn new(value: T) -> Self { - assert!(!value.is_zero()); - NotZero(value) - } - - // implemented here for optimization purposes - #[doc(hidden)] - fn is_null(&self) -> bool { - self.0.is_zero() - } - - #[doc(hidden)] - fn as_ref(&self) -> Option<&Self::Wrapped> { - if !self.is_null() { - Some(&self.0) - } else { - None - } - } - - #[doc(hidden)] - fn as_mut(&mut self) -> Option<&mut Self::Wrapped> { - if !self.is_null() { - Some(&mut self.0) - } else { - None - } - } -} - -impl<T: Zero> From<NotZero<T>> for Option<T> { - fn from(not_zero: NotZero<T>) -> Self { - if !not_zero.is_null() { - Some(not_zero.0) - } else { - None - } - } -} - -/// Base trait for types that can be wrapped in a [`NotZero`](struct.NotZero.html). -/// -/// Implementors must provide a singleton object that will be used to mark empty edges in a -/// [`MatrixGraph`](struct.MatrixGraph.html). -/// -/// Note that this trait is already implemented for the base numeric types. -pub trait Zero { - /// Return the singleton object which can be used as a sentinel value. - fn zero() -> Self; - - /// Return true if `self` is equal to the sentinel value. - fn is_zero(&self) -> bool; -} - -macro_rules! not_zero_impl { - ($t:ty,$z:expr) => { - impl Zero for $t { - fn zero() -> Self { - $z as $t - } - - #[allow(clippy::float_cmp)] - fn is_zero(&self) -> bool { - self == &Self::zero() - } - } - }; -} - -macro_rules! not_zero_impls { - ($($t:ty),*) => { - $( - not_zero_impl!($t, 0); - )* - } -} - -not_zero_impls!(u8, u16, u32, u64, usize); -not_zero_impls!(i8, i16, i32, i64, isize); -not_zero_impls!(f32, f64); - -/// Short version of `NodeIndex::new` (with Ix = `DefaultIx`) -#[inline] -pub fn node_index(ax: usize) -> NodeIndex { - NodeIndex::new(ax) -} - -/// `MatrixGraph<N, E, Ty, Null>` is a graph datastructure using an adjacency matrix -/// representation. -/// -/// `MatrixGraph` is parameterized over: -/// -/// - Associated data `N` for nodes and `E` for edges, called *weights*. -/// The associated data can be of arbitrary type. -/// - Edge type `Ty` that determines whether the graph edges are directed or undirected. -/// - Nullable type `Null`, which denotes the edges' presence (defaults to `Option<E>`). You may -/// specify [`NotZero<E>`](struct.NotZero.html) if you want to use a sentinel value (such as 0) -/// to mark the absence of an edge. -/// - Index type `Ix` that sets the maximum size for the graph (defaults to `DefaultIx`). -/// -/// The graph uses **O(|V^2|)** space, with fast edge insertion & amortized node insertion, as well -/// as efficient graph search and graph algorithms on dense graphs. -/// -/// This graph is backed by a flattened 2D array. For undirected graphs, only the lower triangular -/// matrix is stored. Since the backing array stores edge weights, it is recommended to box large -/// edge weights. -#[derive(Clone)] -pub struct MatrixGraph<N, E, Ty = Directed, Null: Nullable<Wrapped = E> = Option<E>, Ix = DefaultIx> -{ - node_adjacencies: Vec<Null>, - node_capacity: usize, - nodes: IdStorage<N>, - nb_edges: usize, - ty: PhantomData<Ty>, - ix: PhantomData<Ix>, -} - -/// A `MatrixGraph` with directed edges. -pub type DiMatrix<N, E, Null = Option<E>, Ix = DefaultIx> = MatrixGraph<N, E, Directed, Null, Ix>; - -/// A `MatrixGraph` with undirected edges. -pub type UnMatrix<N, E, Null = Option<E>, Ix = DefaultIx> = MatrixGraph<N, E, Undirected, Null, Ix>; - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> - MatrixGraph<N, E, Ty, Null, Ix> -{ - /// Create a new `MatrixGraph` with estimated capacity for nodes. - pub fn with_capacity(node_capacity: usize) -> Self { - let mut m = Self { - node_adjacencies: vec![], - node_capacity: 0, - nodes: IdStorage::with_capacity(node_capacity), - nb_edges: 0, - ty: PhantomData, - ix: PhantomData, - }; - - debug_assert!(node_capacity <= <Ix as IndexType>::max().index()); - if node_capacity > 0 { - m.extend_capacity_for_node(NodeIndex::new(node_capacity - 1), true); - } - - m - } - - #[inline] - fn to_edge_position(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> Option<usize> { - if cmp::max(a.index(), b.index()) >= self.node_capacity { - return None; - } - Some(self.to_edge_position_unchecked(a, b)) - } - - #[inline] - fn to_edge_position_unchecked(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> usize { - to_linearized_matrix_position::<Ty>(a.index(), b.index(), self.node_capacity) - } - - /// Remove all nodes and edges. - pub fn clear(&mut self) { - for edge in self.node_adjacencies.iter_mut() { - *edge = Default::default(); - } - self.nodes.clear(); - self.nb_edges = 0; - } - - /// Return the number of nodes (vertices) in the graph. - /// - /// Computes in **O(1)** time. - #[inline] - pub fn node_count(&self) -> usize { - self.nodes.len() - } - - /// Return the number of edges in the graph. - /// - /// Computes in **O(1)** time. - #[inline] - pub fn edge_count(&self) -> usize { - self.nb_edges - } - - /// Return whether the graph has directed edges or not. - #[inline] - pub fn is_directed(&self) -> bool { - Ty::is_directed() - } - - /// Add a node (also called vertex) with associated data `weight` to the graph. - /// - /// Computes in **O(1)** time. - /// - /// Return the index of the new node. - /// - /// **Panics** if the MatrixGraph is at the maximum number of nodes for its index type. - pub fn add_node(&mut self, weight: N) -> NodeIndex<Ix> { - NodeIndex::new(self.nodes.add(weight)) - } - - /// Remove `a` from the graph. - /// - /// Computes in **O(V)** time, due to the removal of edges with other nodes. - /// - /// **Panics** if the node `a` does not exist. - pub fn remove_node(&mut self, a: NodeIndex<Ix>) -> N { - for id in self.nodes.iter_ids() { - let position = self.to_edge_position(a, NodeIndex::new(id)); - if let Some(pos) = position { - self.node_adjacencies[pos] = Default::default(); - } - - if Ty::is_directed() { - let position = self.to_edge_position(NodeIndex::new(id), a); - if let Some(pos) = position { - self.node_adjacencies[pos] = Default::default(); - } - } - } - - self.nodes.remove(a.index()) - } - - #[inline] - fn extend_capacity_for_node(&mut self, min_node: NodeIndex<Ix>, exact: bool) { - self.node_capacity = extend_linearized_matrix::<Ty, _>( - &mut self.node_adjacencies, - self.node_capacity, - min_node.index() + 1, - exact, - ); - } - - #[inline] - fn extend_capacity_for_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) { - let min_node = cmp::max(a, b); - if min_node.index() >= self.node_capacity { - self.extend_capacity_for_node(min_node, false); - } - } - - /// Update the edge from `a` to `b` to the graph, with its associated data `weight`. - /// - /// Return the previous data, if any. - /// - /// Computes in **O(1)** time, best case. - /// Computes in **O(|V|^2)** time, worst case (matrix needs to be re-allocated). - /// - /// **Panics** if any of the nodes don't exist. - pub fn update_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) -> Option<E> { - self.extend_capacity_for_edge(a, b); - let p = self.to_edge_position_unchecked(a, b); - let old_weight = mem::replace(&mut self.node_adjacencies[p], Null::new(weight)); - if old_weight.is_null() { - self.nb_edges += 1; - } - old_weight.into() - } - - /// Add an edge from `a` to `b` to the graph, with its associated - /// data `weight`. - /// - /// Computes in **O(1)** time, best case. - /// Computes in **O(|V|^2)** time, worst case (matrix needs to be re-allocated). - /// - /// **Panics** if any of the nodes don't exist. - /// **Panics** if an edge already exists from `a` to `b`. - /// - /// **Note:** `MatrixGraph` does not allow adding parallel (“duplicate”) edges. If you want to avoid - /// this, use [`.update_edge(a, b, weight)`](#method.update_edge) instead. - pub fn add_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>, weight: E) { - let old_edge_id = self.update_edge(a, b, weight); - assert!(old_edge_id.is_none()); - } - - /// Remove the edge from `a` to `b` to the graph. - /// - /// **Panics** if any of the nodes don't exist. - /// **Panics** if no edge exists between `a` and `b`. - pub fn remove_edge(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> E { - let p = self - .to_edge_position(a, b) - .expect("No edge found between the nodes."); - let old_weight = mem::take(&mut self.node_adjacencies[p]).into().unwrap(); - let old_weight: Option<_> = old_weight.into(); - self.nb_edges -= 1; - old_weight.unwrap() - } - - /// Return true if there is an edge between `a` and `b`. - /// - /// **Panics** if any of the nodes don't exist. - pub fn has_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - if let Some(p) = self.to_edge_position(a, b) { - return !self.node_adjacencies[p].is_null(); - } - false - } - - /// Access the weight for node `a`. - /// - /// Also available with indexing syntax: `&graph[a]`. - /// - /// **Panics** if the node doesn't exist. - pub fn node_weight(&self, a: NodeIndex<Ix>) -> &N { - &self.nodes[a.index()] - } - - /// Access the weight for node `a`, mutably. - /// - /// Also available with indexing syntax: `&mut graph[a]`. - /// - /// **Panics** if the node doesn't exist. - pub fn node_weight_mut(&mut self, a: NodeIndex<Ix>) -> &mut N { - &mut self.nodes[a.index()] - } - - /// Access the weight for edge `e`. - /// - /// Also available with indexing syntax: `&graph[e]`. - /// - /// **Panics** if no edge exists between `a` and `b`. - pub fn edge_weight(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> &E { - let p = self - .to_edge_position(a, b) - .expect("No edge found between the nodes."); - self.node_adjacencies[p] - .as_ref() - .expect("No edge found between the nodes.") - } - - /// Access the weight for edge `e`, mutably. - /// - /// Also available with indexing syntax: `&mut graph[e]`. - /// - /// **Panics** if no edge exists between `a` and `b`. - pub fn edge_weight_mut(&mut self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> &mut E { - let p = self - .to_edge_position(a, b) - .expect("No edge found between the nodes."); - self.node_adjacencies[p] - .as_mut() - .expect("No edge found between the nodes.") - } - - /// Return an iterator of all nodes with an edge starting from `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges from or to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is [`NodeIndex<Ix>`](../graph/struct.NodeIndex.html). - pub fn neighbors(&self, a: NodeIndex<Ix>) -> Neighbors<Ty, Null, Ix> { - Neighbors(Edges::on_columns( - a.index(), - &self.node_adjacencies, - self.node_capacity, - )) - } - - /// Return an iterator of all edges of `a`. - /// - /// - `Directed`: Outgoing edges from `a`. - /// - `Undirected`: All edges connected to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is `(NodeIndex<Ix>, NodeIndex<Ix>, &E)`. - pub fn edges(&self, a: NodeIndex<Ix>) -> Edges<Ty, Null, Ix> { - Edges::on_columns(a.index(), &self.node_adjacencies, self.node_capacity) - } - - /// Create a new `MatrixGraph` from an iterable of edges. - /// - /// Node weights `N` are set to default values. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - /// - /// ``` - /// use petgraph::matrix_graph::MatrixGraph; - /// - /// let gr = MatrixGraph::<(), i32>::from_edges(&[ - /// (0, 1), (0, 2), (0, 3), - /// (1, 2), (1, 3), - /// (2, 3), - /// ]); - /// ``` - pub fn from_edges<I>(iterable: I) -> Self - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E>, - <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>, - N: Default, - { - let mut g = Self::default(); - g.extend_with_edges(iterable); - g - } - - /// Extend the graph from an iterable of edges. - /// - /// Node weights `N` are set to default values. - /// Edge weights `E` may either be specified in the list, - /// or they are filled with default values. - /// - /// Nodes are inserted automatically to match the edges. - pub fn extend_with_edges<I>(&mut self, iterable: I) - where - I: IntoIterator, - I::Item: IntoWeightedEdge<E>, - <I::Item as IntoWeightedEdge<E>>::NodeId: Into<NodeIndex<Ix>>, - N: Default, - { - for elt in iterable { - let (source, target, weight) = elt.into_weighted_edge(); - let (source, target) = (source.into(), target.into()); - let nx = cmp::max(source, target); - while nx.index() >= self.node_count() { - self.add_node(N::default()); - } - self.add_edge(source, target, weight); - } - } -} - -impl<N, E, Null: Nullable<Wrapped = E>, Ix: IndexType> MatrixGraph<N, E, Directed, Null, Ix> { - /// Return an iterator of all neighbors that have an edge between them and - /// `a`, in the specified direction. - /// If the graph's edges are undirected, this is equivalent to *.neighbors(a)*. - /// - /// - `Outgoing`: All edges from `a`. - /// - `Incoming`: All edges to `a`. - /// - /// Produces an empty iterator if the node doesn't exist.<br> - /// Iterator element type is [`NodeIndex<Ix>`](../graph/struct.NodeIndex.html). - pub fn neighbors_directed( - &self, - a: NodeIndex<Ix>, - d: Direction, - ) -> Neighbors<Directed, Null, Ix> { - if d == Outgoing { - self.neighbors(a) - } else { - Neighbors(Edges::on_rows( - a.index(), - &self.node_adjacencies, - self.node_capacity, - )) - } - } - - /// Return an iterator of all edges of `a`, in the specified direction. - /// - /// - `Outgoing`: All edges from `a`. - /// - `Incoming`: All edges to `a`. - /// - /// Produces an empty iterator if the node `a` doesn't exist.<br> - /// Iterator element type is `(NodeIndex<Ix>, NodeIndex<Ix>, &E)`. - pub fn edges_directed(&self, a: NodeIndex<Ix>, d: Direction) -> Edges<Directed, Null, Ix> { - if d == Outgoing { - self.edges(a) - } else { - Edges::on_rows(a.index(), &self.node_adjacencies, self.node_capacity) - } - } -} - -/// Iterator over the node identifiers of a graph. -/// -/// Created from a call to [`.node_identifiers()`][1] on a [`MatrixGraph`][2]. -/// -/// [1]: ../visit/trait.IntoNodeIdentifiers.html#tymethod.node_identifiers -/// [2]: struct.MatrixGraph.html -#[derive(Debug, Clone)] -pub struct NodeIdentifiers<'a, Ix> { - iter: IdIterator<'a>, - ix: PhantomData<Ix>, -} - -impl<'a, Ix: IndexType> NodeIdentifiers<'a, Ix> { - fn new(iter: IdIterator<'a>) -> Self { - Self { - iter, - ix: PhantomData, - } - } -} - -impl<Ix: IndexType> Iterator for NodeIdentifiers<'_, Ix> { - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(NodeIndex::new) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -/// Iterator over all nodes of a graph. -/// -/// Created from a call to [`.node_references()`][1] on a [`MatrixGraph`][2]. -/// -/// [1]: ../visit/trait.IntoNodeReferences.html#tymethod.node_references -/// [2]: struct.MatrixGraph.html -#[derive(Debug, Clone)] -pub struct NodeReferences<'a, N: 'a, Ix> { - nodes: &'a IdStorage<N>, - iter: IdIterator<'a>, - ix: PhantomData<Ix>, -} - -impl<'a, N: 'a, Ix> NodeReferences<'a, N, Ix> { - fn new(nodes: &'a IdStorage<N>) -> Self { - NodeReferences { - nodes, - iter: nodes.iter_ids(), - ix: PhantomData, - } - } -} - -impl<'a, N: 'a, Ix: IndexType> Iterator for NodeReferences<'a, N, Ix> { - type Item = (NodeIndex<Ix>, &'a N); - - fn next(&mut self) -> Option<Self::Item> { - self.iter - .next() - .map(|i| (NodeIndex::new(i), &self.nodes[i])) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -/// Iterator over all edges of a graph. -/// -/// Created from a call to [`.edge_references()`][1] on a [`MatrixGraph`][2]. -/// -/// [1]: ../visit/trait.IntoEdgeReferences.html#tymethod.edge_references -/// [2]: struct.MatrixGraph.html -#[derive(Debug, Clone)] -pub struct EdgeReferences<'a, Ty: EdgeType, Null: 'a + Nullable, Ix> { - row: usize, - column: usize, - node_adjacencies: &'a [Null], - node_capacity: usize, - ty: PhantomData<Ty>, - ix: PhantomData<Ix>, -} - -impl<'a, Ty: EdgeType, Null: 'a + Nullable, Ix> EdgeReferences<'a, Ty, Null, Ix> { - fn new(node_adjacencies: &'a [Null], node_capacity: usize) -> Self { - EdgeReferences { - row: 0, - column: 0, - node_adjacencies, - node_capacity, - ty: PhantomData, - ix: PhantomData, - } - } -} - -impl<'a, Ty: EdgeType, Null: Nullable, Ix: IndexType> Iterator - for EdgeReferences<'a, Ty, Null, Ix> -{ - type Item = (NodeIndex<Ix>, NodeIndex<Ix>, &'a Null::Wrapped); - - fn next(&mut self) -> Option<Self::Item> { - loop { - let (row, column) = (self.row, self.column); - if row >= self.node_capacity { - return None; - } - - // By default, advance the column. Reset and advance the row if the column overflows. - // - // Note that for undirected graphs, we don't want to yield the same edge twice, - // therefore the maximum column length should be the index new after the row index. - self.column += 1; - let max_column_len = if !Ty::is_directed() { - row + 1 - } else { - self.node_capacity - }; - if self.column >= max_column_len { - self.column = 0; - self.row += 1; - } - - let p = to_linearized_matrix_position::<Ty>(row, column, self.node_capacity); - if let Some(e) = self.node_adjacencies[p].as_ref() { - return Some((NodeIndex::new(row), NodeIndex::new(column), e)); - } - } - } -} - -/// Iterator over the neighbors of a node. -/// -/// Iterator element type is `NodeIndex<Ix>`. -/// -/// Created with [`.neighbors()`][1], [`.neighbors_directed()`][2]. -/// -/// [1]: struct.MatrixGraph.html#method.neighbors -/// [2]: struct.MatrixGraph.html#method.neighbors_directed -#[derive(Debug, Clone)] -pub struct Neighbors<'a, Ty: EdgeType, Null: 'a + Nullable, Ix>(Edges<'a, Ty, Null, Ix>); - -impl<Ty: EdgeType, Null: Nullable, Ix: IndexType> Iterator for Neighbors<'_, Ty, Null, Ix> { - type Item = NodeIndex<Ix>; - - fn next(&mut self) -> Option<Self::Item> { - self.0.next().map(|(_, b, _)| b) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.0.size_hint() - } -} - -#[derive(Debug, Clone, Copy, PartialEq, Eq)] -enum NeighborIterDirection { - Rows, - Columns, -} - -/// Iterator over the edges of from or to a node -/// -/// Created with [`.edges()`][1], [`.edges_directed()`][2]. -/// -/// [1]: struct.MatrixGraph.html#method.edges -/// [2]: struct.MatrixGraph.html#method.edges_directed -#[derive(Debug, Clone)] -pub struct Edges<'a, Ty: EdgeType, Null: 'a + Nullable, Ix> { - iter_direction: NeighborIterDirection, - node_adjacencies: &'a [Null], - node_capacity: usize, - row: usize, - column: usize, - ty: PhantomData<Ty>, - ix: PhantomData<Ix>, -} - -impl<'a, Ty: EdgeType, Null: 'a + Nullable, Ix> Edges<'a, Ty, Null, Ix> { - fn on_columns(row: usize, node_adjacencies: &'a [Null], node_capacity: usize) -> Self { - Edges { - iter_direction: NeighborIterDirection::Columns, - node_adjacencies, - node_capacity, - row, - column: 0, - ty: PhantomData, - ix: PhantomData, - } - } - - fn on_rows(column: usize, node_adjacencies: &'a [Null], node_capacity: usize) -> Self { - Edges { - iter_direction: NeighborIterDirection::Rows, - node_adjacencies, - node_capacity, - row: 0, - column, - ty: PhantomData, - ix: PhantomData, - } - } -} - -impl<'a, Ty: EdgeType, Null: Nullable, Ix: IndexType> Iterator for Edges<'a, Ty, Null, Ix> { - type Item = (NodeIndex<Ix>, NodeIndex<Ix>, &'a Null::Wrapped); - - fn next(&mut self) -> Option<Self::Item> { - use self::NeighborIterDirection::*; - - loop { - let (row, column) = (self.row, self.column); - if row >= self.node_capacity || column >= self.node_capacity { - return None; - } - - match self.iter_direction { - Rows => self.row += 1, - Columns => self.column += 1, - } - - let p = to_linearized_matrix_position::<Ty>(row, column, self.node_capacity); - if let Some(e) = self.node_adjacencies[p].as_ref() { - let (a, b) = match self.iter_direction { - Rows => (column, row), - Columns => (row, column), - }; - - return Some((NodeIndex::new(a), NodeIndex::new(b), e)); - } - } - } -} - -#[inline] -fn to_linearized_matrix_position<Ty: EdgeType>(row: usize, column: usize, width: usize) -> usize { - if Ty::is_directed() { - to_flat_square_matrix_position(row, column, width) - } else { - to_lower_triangular_matrix_position(row, column) - } -} - -#[inline] -fn extend_linearized_matrix<Ty: EdgeType, T: Default>( - node_adjacencies: &mut Vec<T>, - old_node_capacity: usize, - new_capacity: usize, - exact: bool, -) -> usize { - if old_node_capacity >= new_capacity { - return old_node_capacity; - } - if Ty::is_directed() { - extend_flat_square_matrix(node_adjacencies, old_node_capacity, new_capacity, exact) - } else { - extend_lower_triangular_matrix(node_adjacencies, new_capacity) - } -} - -#[inline] -fn to_flat_square_matrix_position(row: usize, column: usize, width: usize) -> usize { - row * width + column -} - -#[inline] -fn extend_flat_square_matrix<T: Default>( - node_adjacencies: &mut Vec<T>, - old_node_capacity: usize, - new_node_capacity: usize, - exact: bool, -) -> usize { - // Grow the capacity by exponential steps to avoid repeated allocations. - // Disabled for the with_capacity constructor. - let new_node_capacity = if exact { - new_node_capacity - } else { - const MIN_CAPACITY: usize = 4; - cmp::max(new_node_capacity.next_power_of_two(), MIN_CAPACITY) - }; - - // Optimization: when resizing the matrix this way we skip the first few grows to make - // small matrices a bit faster to work with. - - ensure_len(node_adjacencies, new_node_capacity.pow(2)); - for c in (1..old_node_capacity).rev() { - let pos = c * old_node_capacity; - let new_pos = c * new_node_capacity; - // Move the slices directly if they do not overlap with their new position - if pos + old_node_capacity <= new_pos { - debug_assert!(pos + old_node_capacity < node_adjacencies.len()); - debug_assert!(new_pos + old_node_capacity < node_adjacencies.len()); - let ptr = node_adjacencies.as_mut_ptr(); - // SAFETY: pos + old_node_capacity <= new_pos, so this won't overlap - unsafe { - let old = ptr.add(pos); - let new = ptr.add(new_pos); - core::ptr::swap_nonoverlapping(old, new, old_node_capacity); - } - } else { - for i in (0..old_node_capacity).rev() { - node_adjacencies.as_mut_slice().swap(pos + i, new_pos + i); - } - } - } - - new_node_capacity -} - -#[inline] -fn to_lower_triangular_matrix_position(row: usize, column: usize) -> usize { - let (row, column) = if row > column { - (row, column) - } else { - (column, row) - }; - (row * (row + 1)) / 2 + column -} - -#[inline] -fn extend_lower_triangular_matrix<T: Default>( - node_adjacencies: &mut Vec<T>, - new_capacity: usize, -) -> usize { - let max_node = new_capacity - 1; - let max_pos = to_lower_triangular_matrix_position(max_node, max_node); - ensure_len(node_adjacencies, max_pos + 1); - new_capacity -} - -/// Grow a Vec by appending the type's default value until the `size` is reached. -fn ensure_len<T: Default>(v: &mut Vec<T>, size: usize) { - v.resize_with(size, T::default); -} - -#[derive(Debug, Clone)] -struct IdStorage<T> { - elements: Vec<Option<T>>, - upper_bound: usize, - removed_ids: IndexSet<usize>, -} - -impl<T> IdStorage<T> { - fn with_capacity(capacity: usize) -> Self { - IdStorage { - elements: Vec::with_capacity(capacity), - upper_bound: 0, - removed_ids: IndexSet::new(), - } - } - - fn add(&mut self, element: T) -> usize { - let id = if let Some(id) = self.removed_ids.pop() { - id - } else { - let id = self.upper_bound; - self.upper_bound += 1; - - ensure_len(&mut self.elements, id + 1); - - id - }; - - self.elements[id] = Some(element); - - id - } - - fn remove(&mut self, id: usize) -> T { - let data = self.elements[id].take().unwrap(); - if self.upper_bound - id == 1 { - self.upper_bound -= 1; - } else { - self.removed_ids.insert(id); - } - data - } - - fn clear(&mut self) { - self.upper_bound = 0; - self.elements.clear(); - self.removed_ids.clear(); - } - - #[inline] - fn len(&self) -> usize { - self.upper_bound - self.removed_ids.len() - } - - fn iter_ids(&self) -> IdIterator { - IdIterator { - upper_bound: self.upper_bound, - removed_ids: &self.removed_ids, - current: None, - } - } -} - -impl<T> Index<usize> for IdStorage<T> { - type Output = T; - fn index(&self, index: usize) -> &T { - self.elements[index].as_ref().unwrap() - } -} - -impl<T> IndexMut<usize> for IdStorage<T> { - fn index_mut(&mut self, index: usize) -> &mut T { - self.elements[index].as_mut().unwrap() - } -} - -#[derive(Debug, Clone)] -struct IdIterator<'a> { - upper_bound: usize, - removed_ids: &'a IndexSet<usize>, - current: Option<usize>, -} - -impl Iterator for IdIterator<'_> { - type Item = usize; - - fn next(&mut self) -> Option<Self::Item> { - // initialize / advance - let current = { - if self.current.is_none() { - self.current = Some(0); - self.current.as_mut().unwrap() - } else { - let current = self.current.as_mut().unwrap(); - *current += 1; - current - } - }; - - // skip removed ids - while self.removed_ids.contains(current) && *current < self.upper_bound { - *current += 1; - } - - if *current < self.upper_bound { - Some(*current) - } else { - None - } - } -} - -/// Create a new empty `MatrixGraph`. -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> Default - for MatrixGraph<N, E, Ty, Null, Ix> -{ - fn default() -> Self { - Self::with_capacity(0) - } -} - -impl<N, E> MatrixGraph<N, E, Directed> { - /// Create a new `MatrixGraph` with directed edges. - /// - /// This is a convenience method. Use `MatrixGraph::with_capacity` or `MatrixGraph::default` for - /// a constructor that is generic in all the type parameters of `MatrixGraph`. - pub fn new() -> Self { - MatrixGraph::default() - } -} - -impl<N, E> MatrixGraph<N, E, Undirected> { - /// Create a new `MatrixGraph` with undirected edges. - /// - /// This is a convenience method. Use `MatrixGraph::with_capacity` or `MatrixGraph::default` for - /// a constructor that is generic in all the type parameters of `MatrixGraph`. - pub fn new_undirected() -> Self { - MatrixGraph::default() - } -} - -/// Index the `MatrixGraph` by `NodeIndex` to access node weights. -/// -/// **Panics** if the node doesn't exist. -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> Index<NodeIndex<Ix>> - for MatrixGraph<N, E, Ty, Null, Ix> -{ - type Output = N; - - fn index(&self, ax: NodeIndex<Ix>) -> &N { - self.node_weight(ax) - } -} - -/// Index the `MatrixGraph` by `NodeIndex` to access node weights. -/// -/// **Panics** if the node doesn't exist. -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> IndexMut<NodeIndex<Ix>> - for MatrixGraph<N, E, Ty, Null, Ix> -{ - fn index_mut(&mut self, ax: NodeIndex<Ix>) -> &mut N { - self.node_weight_mut(ax) - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> NodeCount - for MatrixGraph<N, E, Ty, Null, Ix> -{ - fn node_count(&self) -> usize { - MatrixGraph::node_count(self) - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> EdgeCount - for MatrixGraph<N, E, Ty, Null, Ix> -{ - #[inline] - fn edge_count(&self) -> usize { - self.edge_count() - } -} - -/// Index the `MatrixGraph` by `NodeIndex` pair to access edge weights. -/// -/// Also available with indexing syntax: `&graph[e]`. -/// -/// **Panics** if no edge exists between `a` and `b`. -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> - Index<(NodeIndex<Ix>, NodeIndex<Ix>)> for MatrixGraph<N, E, Ty, Null, Ix> -{ - type Output = E; - - fn index(&self, (ax, bx): (NodeIndex<Ix>, NodeIndex<Ix>)) -> &E { - self.edge_weight(ax, bx) - } -} - -/// Index the `MatrixGraph` by `NodeIndex` pair to access edge weights. -/// -/// Also available with indexing syntax: `&mut graph[e]`. -/// -/// **Panics** if no edge exists between `a` and `b`. -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> - IndexMut<(NodeIndex<Ix>, NodeIndex<Ix>)> for MatrixGraph<N, E, Ty, Null, Ix> -{ - fn index_mut(&mut self, (ax, bx): (NodeIndex<Ix>, NodeIndex<Ix>)) -> &mut E { - self.edge_weight_mut(ax, bx) - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> GetAdjacencyMatrix - for MatrixGraph<N, E, Ty, Null, Ix> -{ - type AdjMatrix = (); - - fn adjacency_matrix(&self) -> Self::AdjMatrix {} - - fn is_adjacent(&self, _: &Self::AdjMatrix, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - MatrixGraph::has_edge(self, a, b) - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> Visitable - for MatrixGraph<N, E, Ty, Null, Ix> -{ - type Map = FixedBitSet; - - fn visit_map(&self) -> FixedBitSet { - FixedBitSet::with_capacity(self.node_bound()) - } - - fn reset_map(&self, map: &mut Self::Map) { - map.clear(); - map.grow(self.node_bound()); - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> GraphBase - for MatrixGraph<N, E, Ty, Null, Ix> -{ - type NodeId = NodeIndex<Ix>; - type EdgeId = (NodeIndex<Ix>, NodeIndex<Ix>); -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> GraphProp - for MatrixGraph<N, E, Ty, Null, Ix> -{ - type EdgeType = Ty; -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> Data - for MatrixGraph<N, E, Ty, Null, Ix> -{ - type NodeWeight = N; - type EdgeWeight = E; -} - -impl<'a, N, E: 'a, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoNodeIdentifiers - for &'a MatrixGraph<N, E, Ty, Null, Ix> -{ - type NodeIdentifiers = NodeIdentifiers<'a, Ix>; - - fn node_identifiers(self) -> Self::NodeIdentifiers { - NodeIdentifiers::new(self.nodes.iter_ids()) - } -} - -impl<'a, N, E: 'a, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoNeighbors - for &'a MatrixGraph<N, E, Ty, Null, Ix> -{ - type Neighbors = Neighbors<'a, Ty, Null, Ix>; - - fn neighbors(self, a: NodeIndex<Ix>) -> Self::Neighbors { - MatrixGraph::neighbors(self, a) - } -} - -impl<'a, N, E: 'a, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoNeighborsDirected - for &'a MatrixGraph<N, E, Directed, Null, Ix> -{ - type NeighborsDirected = Neighbors<'a, Directed, Null, Ix>; - - fn neighbors_directed(self, a: NodeIndex<Ix>, d: Direction) -> Self::NeighborsDirected { - MatrixGraph::neighbors_directed(self, a, d) - } -} - -impl<'a, N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoNodeReferences - for &'a MatrixGraph<N, E, Ty, Null, Ix> -{ - type NodeRef = (NodeIndex<Ix>, &'a N); - type NodeReferences = NodeReferences<'a, N, Ix>; - fn node_references(self) -> Self::NodeReferences { - NodeReferences::new(&self.nodes) - } -} - -impl<'a, N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoEdgeReferences - for &'a MatrixGraph<N, E, Ty, Null, Ix> -{ - type EdgeRef = (NodeIndex<Ix>, NodeIndex<Ix>, &'a E); - type EdgeReferences = EdgeReferences<'a, Ty, Null, Ix>; - fn edge_references(self) -> Self::EdgeReferences { - EdgeReferences::new(&self.node_adjacencies, self.node_capacity) - } -} - -impl<'a, N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoEdges - for &'a MatrixGraph<N, E, Ty, Null, Ix> -{ - type Edges = Edges<'a, Ty, Null, Ix>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - MatrixGraph::edges(self, a) - } -} - -impl<'a, N, E, Null: Nullable<Wrapped = E>, Ix: IndexType> IntoEdgesDirected - for &'a MatrixGraph<N, E, Directed, Null, Ix> -{ - type EdgesDirected = Edges<'a, Directed, Null, Ix>; - - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::EdgesDirected { - MatrixGraph::edges_directed(self, a, dir) - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> NodeIndexable - for MatrixGraph<N, E, Ty, Null, Ix> -{ - fn node_bound(&self) -> usize { - self.nodes.upper_bound - } - - fn to_index(&self, ix: NodeIndex<Ix>) -> usize { - ix.index() - } - - fn from_index(&self, ix: usize) -> Self::NodeId { - NodeIndex::new(ix) - } -} - -impl<N, E, Ty: EdgeType, Null: Nullable<Wrapped = E>, Ix: IndexType> Build - for MatrixGraph<N, E, Ty, Null, Ix> -{ - fn add_node(&mut self, weight: Self::NodeWeight) -> Self::NodeId { - self.add_node(weight) - } - - fn add_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Option<Self::EdgeId> { - if !self.has_edge(a, b) { - MatrixGraph::update_edge(self, a, b, weight); - Some((a, b)) - } else { - None - } - } - - fn update_edge( - &mut self, - a: Self::NodeId, - b: Self::NodeId, - weight: Self::EdgeWeight, - ) -> Self::EdgeId { - MatrixGraph::update_edge(self, a, b, weight); - (a, b) - } -} - -#[cfg(test)] -mod tests { - use super::*; - use crate::{Incoming, Outgoing}; - - #[test] - fn test_new() { - let g = MatrixGraph::<i32, i32>::new(); - assert_eq!(g.node_count(), 0); - assert_eq!(g.edge_count(), 0); - } - - #[test] - fn test_default() { - let g = MatrixGraph::<i32, i32>::default(); - assert_eq!(g.node_count(), 0); - assert_eq!(g.edge_count(), 0); - } - - #[test] - fn test_with_capacity() { - let g = MatrixGraph::<i32, i32>::with_capacity(10); - assert_eq!(g.node_count(), 0); - assert_eq!(g.edge_count(), 0); - } - - #[test] - fn test_node_indexing() { - let mut g: MatrixGraph<char, ()> = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - assert_eq!(g.node_count(), 2); - assert_eq!(g.edge_count(), 0); - assert_eq!(g[a], 'a'); - assert_eq!(g[b], 'b'); - } - - #[test] - fn test_remove_node() { - let mut g: MatrixGraph<char, ()> = MatrixGraph::new(); - let a = g.add_node('a'); - - g.remove_node(a); - - assert_eq!(g.node_count(), 0); - assert_eq!(g.edge_count(), 0); - } - - #[test] - fn test_add_edge() { - let mut g = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - g.add_edge(a, b, ()); - g.add_edge(b, c, ()); - assert_eq!(g.node_count(), 3); - assert_eq!(g.edge_count(), 2); - } - - #[test] - /// Adds an edge that triggers a second extension of the matrix. - /// From #425 - fn test_add_edge_with_extension() { - let mut g = DiMatrix::<u8, ()>::new(); - let _n0 = g.add_node(0); - let n1 = g.add_node(1); - let n2 = g.add_node(2); - let n3 = g.add_node(3); - let n4 = g.add_node(4); - let _n5 = g.add_node(5); - g.add_edge(n2, n1, ()); - g.add_edge(n2, n3, ()); - g.add_edge(n2, n4, ()); - assert_eq!(g.node_count(), 6); - assert_eq!(g.edge_count(), 3); - assert!(g.has_edge(n2, n1)); - assert!(g.has_edge(n2, n3)); - assert!(g.has_edge(n2, n4)); - } - - #[test] - fn test_matrix_resize() { - let mut g = DiMatrix::<u8, ()>::with_capacity(3); - let n0 = g.add_node(0); - let n1 = g.add_node(1); - let n2 = g.add_node(2); - let n3 = g.add_node(3); - g.add_edge(n1, n0, ()); - g.add_edge(n1, n1, ()); - // Triggers a resize from capacity 3 to 4 - g.add_edge(n2, n3, ()); - assert_eq!(g.node_count(), 4); - assert_eq!(g.edge_count(), 3); - assert!(g.has_edge(n1, n0)); - assert!(g.has_edge(n1, n1)); - assert!(g.has_edge(n2, n3)); - } - - #[test] - fn test_add_edge_with_weights() { - let mut g = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - g.add_edge(a, b, true); - g.add_edge(b, c, false); - assert!(*g.edge_weight(a, b)); - assert!(!*g.edge_weight(b, c)); - } - - #[test] - fn test_add_edge_with_weights_undirected() { - let mut g = MatrixGraph::new_undirected(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - let d = g.add_node('d'); - g.add_edge(a, b, "ab"); - g.add_edge(a, a, "aa"); - g.add_edge(b, c, "bc"); - g.add_edge(d, d, "dd"); - assert_eq!(*g.edge_weight(a, b), "ab"); - assert_eq!(*g.edge_weight(b, c), "bc"); - } - - /// Shorthand for `.collect::<Vec<_>>()` - trait IntoVec<T> { - fn into_vec(self) -> Vec<T>; - } - - impl<It, T> IntoVec<T> for It - where - It: Iterator<Item = T>, - { - fn into_vec(self) -> Vec<T> { - self.collect() - } - } - - #[test] - fn test_clear() { - let mut g = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - assert_eq!(g.node_count(), 3); - - g.add_edge(a, b, ()); - g.add_edge(b, c, ()); - g.add_edge(c, a, ()); - assert_eq!(g.edge_count(), 3); - - g.clear(); - - assert_eq!(g.node_count(), 0); - assert_eq!(g.edge_count(), 0); - - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - assert_eq!(g.node_count(), 3); - assert_eq!(g.edge_count(), 0); - - assert_eq!(g.neighbors_directed(a, Incoming).into_vec(), vec![]); - assert_eq!(g.neighbors_directed(b, Incoming).into_vec(), vec![]); - assert_eq!(g.neighbors_directed(c, Incoming).into_vec(), vec![]); - - assert_eq!(g.neighbors_directed(a, Outgoing).into_vec(), vec![]); - assert_eq!(g.neighbors_directed(b, Outgoing).into_vec(), vec![]); - assert_eq!(g.neighbors_directed(c, Outgoing).into_vec(), vec![]); - } - - #[test] - fn test_clear_undirected() { - let mut g = MatrixGraph::new_undirected(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - assert_eq!(g.node_count(), 3); - - g.add_edge(a, b, ()); - g.add_edge(b, c, ()); - g.add_edge(c, a, ()); - assert_eq!(g.edge_count(), 3); - - g.clear(); - - assert_eq!(g.node_count(), 0); - assert_eq!(g.edge_count(), 0); - - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - assert_eq!(g.node_count(), 3); - assert_eq!(g.edge_count(), 0); - - assert_eq!(g.neighbors(a).into_vec(), vec![]); - assert_eq!(g.neighbors(b).into_vec(), vec![]); - assert_eq!(g.neighbors(c).into_vec(), vec![]); - } - - /// Helper trait for always sorting before testing. - trait IntoSortedVec<T> { - fn into_sorted_vec(self) -> Vec<T>; - } - - impl<It, T> IntoSortedVec<T> for It - where - It: Iterator<Item = T>, - T: Ord, - { - fn into_sorted_vec(self) -> Vec<T> { - let mut v: Vec<T> = self.collect(); - v.sort(); - v - } - } - - /// Helper macro for always sorting before testing. - macro_rules! sorted_vec { - ($($x:expr),*) => { - { - let mut v = vec![$($x,)*]; - v.sort(); - v - } - } - } - - #[test] - fn test_neighbors() { - let mut g = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - g.add_edge(a, b, ()); - g.add_edge(a, c, ()); - - let a_neighbors = g.neighbors(a).into_sorted_vec(); - assert_eq!(a_neighbors, sorted_vec![b, c]); - - let b_neighbors = g.neighbors(b).into_sorted_vec(); - assert_eq!(b_neighbors, vec![]); - - let c_neighbors = g.neighbors(c).into_sorted_vec(); - assert_eq!(c_neighbors, vec![]); - } - - #[test] - fn test_neighbors_undirected() { - let mut g = MatrixGraph::new_undirected(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - g.add_edge(a, b, ()); - g.add_edge(a, c, ()); - - let a_neighbors = g.neighbors(a).into_sorted_vec(); - assert_eq!(a_neighbors, sorted_vec![b, c]); - - let b_neighbors = g.neighbors(b).into_sorted_vec(); - assert_eq!(b_neighbors, sorted_vec![a]); - - let c_neighbors = g.neighbors(c).into_sorted_vec(); - assert_eq!(c_neighbors, sorted_vec![a]); - } - - #[test] - fn test_remove_node_and_edges() { - let mut g = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - g.add_edge(a, b, ()); - g.add_edge(b, c, ()); - g.add_edge(c, a, ()); - - // removing b should break the `a -> b` and `b -> c` edges - g.remove_node(b); - - assert_eq!(g.node_count(), 2); - - let a_neighbors = g.neighbors(a).into_sorted_vec(); - assert_eq!(a_neighbors, vec![]); - - let c_neighbors = g.neighbors(c).into_sorted_vec(); - assert_eq!(c_neighbors, vec![a]); - } - - #[test] - fn test_remove_node_and_edges_undirected() { - let mut g = UnMatrix::new_undirected(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - g.add_edge(a, b, ()); - g.add_edge(b, c, ()); - g.add_edge(c, a, ()); - - // removing a should break the `a - b` and `a - c` edges - g.remove_node(a); - - assert_eq!(g.node_count(), 2); - - let b_neighbors = g.neighbors(b).into_sorted_vec(); - assert_eq!(b_neighbors, vec![c]); - - let c_neighbors = g.neighbors(c).into_sorted_vec(); - assert_eq!(c_neighbors, vec![b]); - } - - #[test] - fn test_node_identifiers() { - let mut g = MatrixGraph::new(); - let a = g.add_node('a'); - let b = g.add_node('b'); - let c = g.add_node('c'); - let d = g.add_node('c'); - g.add_edge(a, b, ()); - g.add_edge(a, c, ()); - - let node_ids = g.node_identifiers().into_sorted_vec(); - assert_eq!(node_ids, sorted_vec![a, b, c, d]); - } - - #[test] - fn test_edges_directed() { - let g: MatrixGraph<char, bool> = MatrixGraph::from_edges(&[ - (0, 5), - (0, 2), - (0, 3), - (0, 1), - (1, 3), - (2, 3), - (2, 4), - (4, 0), - (6, 6), - ]); - - assert_eq!(g.edges_directed(node_index(0), Outgoing).count(), 4); - assert_eq!(g.edges_directed(node_index(1), Outgoing).count(), 1); - assert_eq!(g.edges_directed(node_index(2), Outgoing).count(), 2); - assert_eq!(g.edges_directed(node_index(3), Outgoing).count(), 0); - assert_eq!(g.edges_directed(node_index(4), Outgoing).count(), 1); - assert_eq!(g.edges_directed(node_index(5), Outgoing).count(), 0); - assert_eq!(g.edges_directed(node_index(6), Outgoing).count(), 1); - - assert_eq!(g.edges_directed(node_index(0), Incoming).count(), 1); - assert_eq!(g.edges_directed(node_index(1), Incoming).count(), 1); - assert_eq!(g.edges_directed(node_index(2), Incoming).count(), 1); - assert_eq!(g.edges_directed(node_index(3), Incoming).count(), 3); - assert_eq!(g.edges_directed(node_index(4), Incoming).count(), 1); - assert_eq!(g.edges_directed(node_index(5), Incoming).count(), 1); - assert_eq!(g.edges_directed(node_index(6), Incoming).count(), 1); - } - - #[test] - fn test_edges_undirected() { - let g: UnMatrix<char, bool> = UnMatrix::from_edges(&[ - (0, 5), - (0, 2), - (0, 3), - (0, 1), - (1, 3), - (2, 3), - (2, 4), - (4, 0), - (6, 6), - ]); - - assert_eq!(g.edges(node_index(0)).count(), 5); - assert_eq!(g.edges(node_index(1)).count(), 2); - assert_eq!(g.edges(node_index(2)).count(), 3); - assert_eq!(g.edges(node_index(3)).count(), 3); - assert_eq!(g.edges(node_index(4)).count(), 2); - assert_eq!(g.edges(node_index(5)).count(), 1); - assert_eq!(g.edges(node_index(6)).count(), 1); - } - - #[test] - fn test_edges_of_absent_node_is_empty_iterator() { - let g: MatrixGraph<char, bool> = MatrixGraph::new(); - assert_eq!(g.edges(node_index(0)).count(), 0); - } - - #[test] - fn test_neighbors_of_absent_node_is_empty_iterator() { - let g: MatrixGraph<char, bool> = MatrixGraph::new(); - assert_eq!(g.neighbors(node_index(0)).count(), 0); - } - - #[test] - fn test_edge_references() { - let g: MatrixGraph<char, bool> = MatrixGraph::from_edges(&[ - (0, 5), - (0, 2), - (0, 3), - (0, 1), - (1, 3), - (2, 3), - (2, 4), - (4, 0), - (6, 6), - ]); - - assert_eq!(g.edge_references().count(), 9); - } - - #[test] - fn test_edge_references_undirected() { - let g: UnMatrix<char, bool> = UnMatrix::from_edges(&[ - (0, 5), - (0, 2), - (0, 3), - (0, 1), - (1, 3), - (2, 3), - (2, 4), - (4, 0), - (6, 6), - ]); - - assert_eq!(g.edge_references().count(), 9); - } - - #[test] - fn test_id_storage() { - use super::IdStorage; - - let mut storage: IdStorage<char> = IdStorage::with_capacity(0); - let a = storage.add('a'); - let b = storage.add('b'); - let c = storage.add('c'); - - assert!(a < b && b < c); - - // list IDs - assert_eq!(storage.iter_ids().into_vec(), vec![a, b, c]); - - storage.remove(b); - - // re-use of IDs - let bb = storage.add('B'); - assert_eq!(b, bb); - - // list IDs - assert_eq!(storage.iter_ids().into_vec(), vec![a, b, c]); - } - - #[test] - fn test_not_zero() { - let mut g: MatrixGraph<(), i32, Directed, NotZero<i32>> = MatrixGraph::default(); - - let a = g.add_node(()); - let b = g.add_node(()); - - assert!(!g.has_edge(a, b)); - assert_eq!(g.edge_count(), 0); - - g.add_edge(a, b, 12); - - assert!(g.has_edge(a, b)); - assert_eq!(g.edge_count(), 1); - assert_eq!(g.edge_weight(a, b), &12); - - g.remove_edge(a, b); - - assert!(!g.has_edge(a, b)); - assert_eq!(g.edge_count(), 0); - } - - #[test] - #[should_panic] - fn test_not_zero_asserted() { - let mut g: MatrixGraph<(), i32, Directed, NotZero<i32>> = MatrixGraph::default(); - - let a = g.add_node(()); - let b = g.add_node(()); - - g.add_edge(a, b, 0); // this should trigger an assertion - } - - #[test] - fn test_not_zero_float() { - let mut g: MatrixGraph<(), f32, Directed, NotZero<f32>> = MatrixGraph::default(); - - let a = g.add_node(()); - let b = g.add_node(()); - - assert!(!g.has_edge(a, b)); - assert_eq!(g.edge_count(), 0); - - g.add_edge(a, b, 12.); - - assert!(g.has_edge(a, b)); - assert_eq!(g.edge_count(), 1); - assert_eq!(g.edge_weight(a, b), &12.); - - g.remove_edge(a, b); - - assert!(!g.has_edge(a, b)); - assert_eq!(g.edge_count(), 0); - } - #[test] - // From https://github.com/petgraph/petgraph/issues/523 - fn test_tarjan_scc_with_removed_node() { - let mut g: MatrixGraph<(), ()> = MatrixGraph::new(); - - g.add_node(()); - let b = g.add_node(()); - g.add_node(()); - - g.remove_node(b); - - assert_eq!( - crate::algo::tarjan_scc(&g), - [[node_index(0)], [node_index(2)]] - ); - } - - #[test] - // From https://github.com/petgraph/petgraph/issues/523 - fn test_kosaraju_scc_with_removed_node() { - let mut g: MatrixGraph<(), ()> = MatrixGraph::new(); - - g.add_node(()); - let b = g.add_node(()); - g.add_node(()); - - g.remove_node(b); - - assert_eq!( - crate::algo::kosaraju_scc(&g), - [[node_index(2)], [node_index(0)]] - ); - } -} diff --git a/vendor/petgraph/src/operator.rs b/vendor/petgraph/src/operator.rs deleted file mode 100644 index baa4f12b..00000000 --- a/vendor/petgraph/src/operator.rs +++ /dev/null @@ -1,83 +0,0 @@ -//! Operators for creating new graphs from existings ones. -use super::graph::{Graph, IndexType}; -use super::EdgeType; -use crate::visit::IntoNodeReferences; - -/// \[Generic\] complement of the graph -/// -/// Computes the graph complement of the input Graph and stores it -/// in the provided empty output Graph. -/// -/// The function does not create self-loops. -/// -/// Computes in **O(|V|^2*log(|V|))** time (average). -/// -/// Returns the complement. -/// -/// # Example -/// ```rust -/// use petgraph::Graph; -/// use petgraph::operator::complement; -/// use petgraph::prelude::*; -/// -/// let mut graph: Graph<(),(),Directed> = Graph::new(); -/// let a = graph.add_node(()); // node with no weight -/// let b = graph.add_node(()); -/// let c = graph.add_node(()); -/// let d = graph.add_node(()); -/// -/// graph.extend_with_edges(&[ -/// (a, b), -/// (b, c), -/// (c, d), -/// ]); -/// // a ----> b ----> c ----> d -/// -/// let mut output: Graph<(), (), Directed> = Graph::new(); -/// -/// complement(&graph, &mut output, ()); -/// -/// let mut expected_res: Graph<(), (), Directed> = Graph::new(); -/// let a = expected_res.add_node(()); -/// let b = expected_res.add_node(()); -/// let c = expected_res.add_node(()); -/// let d = expected_res.add_node(()); -/// expected_res.extend_with_edges(&[ -/// (a, c), -/// (a, d), -/// (b, a), -/// (b, d), -/// (c, a), -/// (c, b), -/// (d, a), -/// (d, b), -/// (d, c), -/// ]); -/// -/// for x in graph.node_indices() { -/// for y in graph.node_indices() { -/// assert_eq!(output.contains_edge(x, y), expected_res.contains_edge(x, y)); -/// } -/// } -/// ``` -pub fn complement<N, E, Ty, Ix>( - input: &Graph<N, E, Ty, Ix>, - output: &mut Graph<N, E, Ty, Ix>, - weight: E, -) where - Ty: EdgeType, - Ix: IndexType, - E: Clone, - N: Clone, -{ - for (_node, weight) in input.node_references() { - output.add_node(weight.clone()); - } - for x in input.node_indices() { - for y in input.node_indices() { - if x != y && !input.contains_edge(x, y) { - output.add_edge(x, y, weight.clone()); - } - } - } -} diff --git a/vendor/petgraph/src/prelude.rs b/vendor/petgraph/src/prelude.rs deleted file mode 100644 index f50b338b..00000000 --- a/vendor/petgraph/src/prelude.rs +++ /dev/null @@ -1,21 +0,0 @@ -//! Commonly used items. -//! -//! ``` -//! use petgraph::prelude::*; -//! ``` - -#[doc(no_inline)] -pub use crate::graph::{DiGraph, EdgeIndex, Graph, NodeIndex, UnGraph}; -#[cfg(feature = "graphmap")] -#[doc(no_inline)] -pub use crate::graphmap::{DiGraphMap, GraphMap, UnGraphMap}; -#[doc(no_inline)] -#[cfg(feature = "stable_graph")] -pub use crate::stable_graph::{StableDiGraph, StableGraph, StableUnGraph}; -#[doc(no_inline)] -pub use crate::visit::{Bfs, Dfs, DfsPostOrder}; -#[doc(no_inline)] -pub use crate::{Directed, Direction, Incoming, Outgoing, Undirected}; - -#[doc(no_inline)] -pub use crate::visit::EdgeRef; diff --git a/vendor/petgraph/src/quickcheck.rs b/vendor/petgraph/src/quickcheck.rs deleted file mode 100644 index 17375b45..00000000 --- a/vendor/petgraph/src/quickcheck.rs +++ /dev/null @@ -1,216 +0,0 @@ -extern crate quickcheck; -use self::quickcheck::{Arbitrary, Gen}; - -use crate::graph::{node_index, IndexType}; -#[cfg(feature = "stable_graph")] -use crate::stable_graph::StableGraph; -use crate::{EdgeType, Graph}; - -#[cfg(feature = "graphmap")] -use crate::graphmap::{GraphMap, NodeTrait}; -use crate::visit::NodeIndexable; - -/// Return a random float in the range [0, 1.) -fn random_01<G: Gen>(g: &mut G) -> f64 { - // from rand - let bits = 53; - let scale = 1. / ((1u64 << bits) as f64); - let x: u64 = Arbitrary::arbitrary(g); - (x >> (64 - bits)) as f64 * scale -} - -/// `Arbitrary` for `Graph` creates a graph by selecting a node count -/// and a probability for each possible edge to exist. -/// -/// The result will be simple graph or digraph, self loops -/// possible, no parallel edges. -/// -/// The exact properties of the produced graph is subject to change. -/// -/// Requires crate feature `"quickcheck"` -impl<N, E, Ty, Ix> Arbitrary for Graph<N, E, Ty, Ix> -where - N: Arbitrary, - E: Arbitrary, - Ty: EdgeType + Send + 'static, - Ix: IndexType + Send, -{ - fn arbitrary<G: Gen>(g: &mut G) -> Self { - let nodes = usize::arbitrary(g); - if nodes == 0 { - return Graph::with_capacity(0, 0); - } - // use X² for edge probability (bias towards lower) - let edge_prob = random_01(g) * random_01(g); - let edges = ((nodes as f64).powi(2) * edge_prob) as usize; - let mut gr = Graph::with_capacity(nodes, edges); - for _ in 0..nodes { - gr.add_node(N::arbitrary(g)); - } - for i in gr.node_indices() { - for j in gr.node_indices() { - if !gr.is_directed() && i > j { - continue; - } - let p: f64 = random_01(g); - if p <= edge_prob { - gr.add_edge(i, j, E::arbitrary(g)); - } - } - } - gr - } - - // shrink the graph by splitting it in two by a very - // simple algorithm, just even and odd node indices - fn shrink(&self) -> Box<dyn Iterator<Item = Self>> { - let self_ = self.clone(); - Box::new((0..2).filter_map(move |x| { - let gr = self_.filter_map( - |i, w| { - if i.index() % 2 == x { - Some(w.clone()) - } else { - None - } - }, - |_, w| Some(w.clone()), - ); - // make sure we shrink - if gr.node_count() < self_.node_count() { - Some(gr) - } else { - None - } - })) - } -} - -#[cfg(feature = "stable_graph")] -/// `Arbitrary` for `StableGraph` creates a graph by selecting a node count -/// and a probability for each possible edge to exist. -/// -/// The result will be simple graph or digraph, with possible -/// self loops, no parallel edges. -/// -/// The exact properties of the produced graph is subject to change. -/// -/// Requires crate features `"quickcheck"` and `"stable_graph"` -impl<N, E, Ty, Ix> Arbitrary for StableGraph<N, E, Ty, Ix> -where - N: Arbitrary, - E: Arbitrary, - Ty: EdgeType + Send + 'static, - Ix: IndexType + Send, -{ - fn arbitrary<G: Gen>(g: &mut G) -> Self { - let nodes = usize::arbitrary(g); - if nodes == 0 { - return StableGraph::with_capacity(0, 0); - } - // use X² for edge probability (bias towards lower) - let edge_prob = random_01(g) * random_01(g); - let edges = ((nodes as f64).powi(2) * edge_prob) as usize; - let mut gr = StableGraph::with_capacity(nodes, edges); - for _ in 0..nodes { - gr.add_node(N::arbitrary(g)); - } - for i in 0..gr.node_count() { - for j in 0..gr.node_count() { - let i = node_index(i); - let j = node_index(j); - if !gr.is_directed() && i > j { - continue; - } - let p: f64 = random_01(g); - if p <= edge_prob { - gr.add_edge(i, j, E::arbitrary(g)); - } - } - } - if bool::arbitrary(g) { - // potentially remove nodes to make holes in nodes & edge sets - let n = u8::arbitrary(g) % (gr.node_count() as u8); - for _ in 0..n { - let ni = node_index(usize::arbitrary(g) % gr.node_bound()); - if gr.node_weight(ni).is_some() { - gr.remove_node(ni); - } - } - } - gr - } - - // shrink the graph by splitting it in two by a very - // simple algorithm, just even and odd node indices - fn shrink(&self) -> Box<dyn Iterator<Item = Self>> { - let self_ = self.clone(); - Box::new((0..2).filter_map(move |x| { - let gr = self_.filter_map( - |i, w| { - if i.index() % 2 == x { - Some(w.clone()) - } else { - None - } - }, - |_, w| Some(w.clone()), - ); - // make sure we shrink - if gr.node_count() < self_.node_count() { - Some(gr) - } else { - None - } - })) - } -} - -/// `Arbitrary` for `GraphMap` creates a graph by selecting a node count -/// and a probability for each possible edge to exist. -/// -/// The result will be simple graph or digraph, self loops -/// possible, no parallel edges. -/// -/// The exact properties of the produced graph is subject to change. -/// -/// Requires crate features `"quickcheck"` and `"graphmap"` -#[cfg(feature = "graphmap")] -impl<N, E, Ty> Arbitrary for GraphMap<N, E, Ty> -where - N: NodeTrait + Arbitrary, - E: Arbitrary, - Ty: EdgeType + Clone + Send + 'static, -{ - fn arbitrary<G: Gen>(g: &mut G) -> Self { - let nodes = usize::arbitrary(g); - if nodes == 0 { - return GraphMap::with_capacity(0, 0); - } - let mut nodes = (0..nodes).map(|_| N::arbitrary(g)).collect::<Vec<_>>(); - nodes.sort(); - nodes.dedup(); - - // use X² for edge probability (bias towards lower) - let edge_prob = random_01(g) * random_01(g); - let edges = ((nodes.len() as f64).powi(2) * edge_prob) as usize; - let mut gr = GraphMap::with_capacity(nodes.len(), edges); - for &node in &nodes { - gr.add_node(node); - } - for (index, &i) in nodes.iter().enumerate() { - let js = if Ty::is_directed() { - &nodes[..] - } else { - &nodes[index..] - }; - for &j in js { - let p: f64 = random_01(g); - if p <= edge_prob { - gr.add_edge(i, j, E::arbitrary(g)); - } - } - } - gr - } -} diff --git a/vendor/petgraph/src/scored.rs b/vendor/petgraph/src/scored.rs deleted file mode 100644 index a1c8af9b..00000000 --- a/vendor/petgraph/src/scored.rs +++ /dev/null @@ -1,93 +0,0 @@ -use std::cmp::Ordering; - -/// `MinScored<K, T>` holds a score `K` and a scored object `T` in -/// a pair for use with a `BinaryHeap`. -/// -/// `MinScored` compares in reverse order by the score, so that we can -/// use `BinaryHeap` as a min-heap to extract the score-value pair with the -/// least score. -/// -/// **Note:** `MinScored` implements a total order (`Ord`), so that it is -/// possible to use float types as scores. -#[derive(Copy, Clone, Debug)] -pub struct MinScored<K, T>(pub K, pub T); - -impl<K: PartialOrd, T> PartialEq for MinScored<K, T> { - #[inline] - fn eq(&self, other: &MinScored<K, T>) -> bool { - self.cmp(other) == Ordering::Equal - } -} - -impl<K: PartialOrd, T> Eq for MinScored<K, T> {} - -impl<K: PartialOrd, T> PartialOrd for MinScored<K, T> { - #[inline] - fn partial_cmp(&self, other: &MinScored<K, T>) -> Option<Ordering> { - Some(self.cmp(other)) - } -} - -impl<K: PartialOrd, T> Ord for MinScored<K, T> { - #[inline] - fn cmp(&self, other: &MinScored<K, T>) -> Ordering { - let a = &self.0; - let b = &other.0; - if a == b { - Ordering::Equal - } else if a < b { - Ordering::Greater - } else if a > b { - Ordering::Less - } else if a.ne(a) && b.ne(b) { - // these are the NaN cases - Ordering::Equal - } else if a.ne(a) { - // Order NaN less, so that it is last in the MinScore order - Ordering::Less - } else { - Ordering::Greater - } - } -} - -#[derive(Copy, Clone, Debug)] -pub struct MaxScored<K, T>(pub K, pub T); - -impl<K: PartialOrd, T> PartialEq for MaxScored<K, T> { - #[inline] - fn eq(&self, other: &MaxScored<K, T>) -> bool { - self.cmp(other) == Ordering::Equal - } -} - -impl<K: PartialOrd, T> Eq for MaxScored<K, T> {} - -impl<K: PartialOrd, T> PartialOrd for MaxScored<K, T> { - #[inline] - fn partial_cmp(&self, other: &MaxScored<K, T>) -> Option<Ordering> { - Some(self.cmp(other)) - } -} - -impl<K: PartialOrd, T> Ord for MaxScored<K, T> { - #[inline] - fn cmp(&self, other: &MaxScored<K, T>) -> Ordering { - let a = &self.0; - let b = &other.0; - if a == b { - Ordering::Equal - } else if a < b { - Ordering::Less - } else if a > b { - Ordering::Greater - } else if a.ne(a) && b.ne(b) { - // these are the NaN cases - Ordering::Equal - } else if a.ne(a) { - Ordering::Less - } else { - Ordering::Greater - } - } -} diff --git a/vendor/petgraph/src/serde_utils.rs b/vendor/petgraph/src/serde_utils.rs deleted file mode 100644 index f127f33b..00000000 --- a/vendor/petgraph/src/serde_utils.rs +++ /dev/null @@ -1,95 +0,0 @@ -use serde::de::{Deserialize, Error, SeqAccess, Visitor}; -use serde::ser::{Serialize, SerializeSeq, Serializer}; -use std::fmt; -use std::marker::PhantomData; - -/// Map to serializeable representation -pub trait IntoSerializable { - type Output; - fn into_serializable(self) -> Self::Output; -} - -/// Map from deserialized representation -pub trait FromDeserialized: Sized { - type Input; - fn from_deserialized<E>(input: Self::Input) -> Result<Self, E> - where - E: Error; -} - -/// Serde combinator. A sequence visitor that maps deserialized elements -/// lazily; the visitor can also emit new errors if the elements have errors. -pub struct MappedSequenceVisitor<T, R, F> -where - F: Fn(T) -> Result<R, &'static str>, -{ - f: F, - marker: PhantomData<fn() -> T>, -} - -impl<'de, F, T, R> MappedSequenceVisitor<T, R, F> -where - T: Deserialize<'de>, - F: Fn(T) -> Result<R, &'static str>, -{ - pub fn new(f: F) -> Self { - MappedSequenceVisitor { - f: f, - marker: PhantomData, - } - } -} - -impl<'de, F, T, R> Visitor<'de> for MappedSequenceVisitor<T, R, F> -where - T: Deserialize<'de>, - F: Fn(T) -> Result<R, &'static str>, -{ - type Value = Vec<R>; - - fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { - write!(formatter, "a sequence") - } - fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error> - where - A: SeqAccess<'de>, - { - let mut v = Vec::new(); - while let Some(elem) = seq.next_element()? { - match (self.f)(elem) { - Err(s) => Err(<A::Error>::custom(s))?, - Ok(x) => v.push(x), - } - } - Ok(v) - } -} - -pub trait CollectSeqWithLength: Serializer { - fn collect_seq_with_length<I>(self, length: usize, iterable: I) -> Result<Self::Ok, Self::Error> - where - I: IntoIterator, - I::Item: Serialize, - { - let mut count = 0; - let mut seq = self.serialize_seq(Some(length))?; - for element in iterable { - seq.serialize_element(&element)?; - count += 1; - } - debug_assert_eq!(length, count, "collect_seq_with_length: length mismatch!"); - seq.end() - } - - fn collect_seq_exact<I>(self, iterable: I) -> Result<Self::Ok, Self::Error> - where - I: IntoIterator, - I::Item: Serialize, - I::IntoIter: ExactSizeIterator, - { - let iter = iterable.into_iter(); - self.collect_seq_with_length(iter.len(), iter) - } -} - -impl<S> CollectSeqWithLength for S where S: Serializer {} diff --git a/vendor/petgraph/src/traits_graph.rs b/vendor/petgraph/src/traits_graph.rs deleted file mode 100644 index 272e9e7f..00000000 --- a/vendor/petgraph/src/traits_graph.rs +++ /dev/null @@ -1,73 +0,0 @@ -use fixedbitset::FixedBitSet; - -use super::EdgeType; - -use super::graph::{Graph, IndexType, NodeIndex}; -#[cfg(feature = "stable_graph")] -use crate::stable_graph::StableGraph; -use crate::visit::EdgeRef; -#[cfg(feature = "stable_graph")] -use crate::visit::{IntoEdgeReferences, NodeIndexable}; - -use super::visit::GetAdjacencyMatrix; - -/// The adjacency matrix for **Graph** is a bitmap that's computed by -/// `.adjacency_matrix()`. -impl<N, E, Ty, Ix> GetAdjacencyMatrix for Graph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type AdjMatrix = FixedBitSet; - - fn adjacency_matrix(&self) -> FixedBitSet { - let n = self.node_count(); - let mut matrix = FixedBitSet::with_capacity(n * n); - for edge in self.edge_references() { - let i = edge.source().index() * n + edge.target().index(); - matrix.put(i); - if !self.is_directed() { - let j = edge.source().index() + n * edge.target().index(); - matrix.put(j); - } - } - matrix - } - - fn is_adjacent(&self, matrix: &FixedBitSet, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - let n = self.node_count(); - let index = n * a.index() + b.index(); - matrix.contains(index) - } -} - -#[cfg(feature = "stable_graph")] -/// The adjacency matrix for **Graph** is a bitmap that's computed by -/// `.adjacency_matrix()`. -impl<N, E, Ty, Ix> GetAdjacencyMatrix for StableGraph<N, E, Ty, Ix> -where - Ty: EdgeType, - Ix: IndexType, -{ - type AdjMatrix = FixedBitSet; - - fn adjacency_matrix(&self) -> FixedBitSet { - let n = self.node_bound(); - let mut matrix = FixedBitSet::with_capacity(n * n); - for edge in self.edge_references() { - let i = edge.source().index() * n + edge.target().index(); - matrix.put(i); - if !self.is_directed() { - let j = edge.source().index() + n * edge.target().index(); - matrix.put(j); - } - } - matrix - } - - fn is_adjacent(&self, matrix: &FixedBitSet, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool { - let n = self.node_count(); - let index = n * a.index() + b.index(); - matrix.contains(index) - } -} diff --git a/vendor/petgraph/src/unionfind.rs b/vendor/petgraph/src/unionfind.rs deleted file mode 100644 index 2f6b12c0..00000000 --- a/vendor/petgraph/src/unionfind.rs +++ /dev/null @@ -1,146 +0,0 @@ -//! `UnionFind<K>` is a disjoint-set data structure. - -use super::graph::IndexType; -use std::cmp::Ordering; - -/// `UnionFind<K>` is a disjoint-set data structure. It tracks set membership of *n* elements -/// indexed from *0* to *n - 1*. The scalar type is `K` which must be an unsigned integer type. -/// -/// <http://en.wikipedia.org/wiki/Disjoint-set_data_structure> -/// -/// Too awesome not to quote: -/// -/// “The amortized time per operation is **O(α(n))** where **α(n)** is the -/// inverse of **f(x) = A(x, x)** with **A** being the extremely fast-growing Ackermann function.” -#[derive(Debug, Clone)] -pub struct UnionFind<K> { - // For element at index *i*, store the index of its parent; the representative itself - // stores its own index. This forms equivalence classes which are the disjoint sets, each - // with a unique representative. - parent: Vec<K>, - // It is a balancing tree structure, - // so the ranks are logarithmic in the size of the container -- a byte is more than enough. - // - // Rank is separated out both to save space and to save cache in when searching in the parent - // vector. - rank: Vec<u8>, -} - -#[inline] -unsafe fn get_unchecked<K>(xs: &[K], index: usize) -> &K { - debug_assert!(index < xs.len()); - xs.get_unchecked(index) -} - -#[inline] -unsafe fn get_unchecked_mut<K>(xs: &mut [K], index: usize) -> &mut K { - debug_assert!(index < xs.len()); - xs.get_unchecked_mut(index) -} - -impl<K> UnionFind<K> -where - K: IndexType, -{ - /// Create a new `UnionFind` of `n` disjoint sets. - pub fn new(n: usize) -> Self { - let rank = vec![0; n]; - let parent = (0..n).map(K::new).collect::<Vec<K>>(); - - UnionFind { parent, rank } - } - - /// Return the representative for `x`. - /// - /// **Panics** if `x` is out of bounds. - pub fn find(&self, x: K) -> K { - assert!(x.index() < self.parent.len()); - unsafe { - let mut x = x; - loop { - // Use unchecked indexing because we can trust the internal set ids. - let xparent = *get_unchecked(&self.parent, x.index()); - if xparent == x { - break; - } - x = xparent; - } - x - } - } - - /// Return the representative for `x`. - /// - /// Write back the found representative, flattening the internal - /// datastructure in the process and quicken future lookups. - /// - /// **Panics** if `x` is out of bounds. - pub fn find_mut(&mut self, x: K) -> K { - assert!(x.index() < self.parent.len()); - unsafe { self.find_mut_recursive(x) } - } - - unsafe fn find_mut_recursive(&mut self, mut x: K) -> K { - let mut parent = *get_unchecked(&self.parent, x.index()); - while parent != x { - let grandparent = *get_unchecked(&self.parent, parent.index()); - *get_unchecked_mut(&mut self.parent, x.index()) = grandparent; - x = parent; - parent = grandparent; - } - x - } - - /// Returns `true` if the given elements belong to the same set, and returns - /// `false` otherwise. - pub fn equiv(&self, x: K, y: K) -> bool { - self.find(x) == self.find(y) - } - - /// Unify the two sets containing `x` and `y`. - /// - /// Return `false` if the sets were already the same, `true` if they were unified. - /// - /// **Panics** if `x` or `y` is out of bounds. - pub fn union(&mut self, x: K, y: K) -> bool { - if x == y { - return false; - } - let xrep = self.find_mut(x); - let yrep = self.find_mut(y); - - if xrep == yrep { - return false; - } - - let xrepu = xrep.index(); - let yrepu = yrep.index(); - let xrank = self.rank[xrepu]; - let yrank = self.rank[yrepu]; - - // The rank corresponds roughly to the depth of the treeset, so put the - // smaller set below the larger - match xrank.cmp(&yrank) { - Ordering::Less => self.parent[xrepu] = yrep, - Ordering::Greater => self.parent[yrepu] = xrep, - Ordering::Equal => { - self.parent[yrepu] = xrep; - self.rank[xrepu] += 1; - } - } - true - } - - /// Return a vector mapping each element to its representative. - pub fn into_labeling(mut self) -> Vec<K> { - // write in the labeling of each element - unsafe { - for ix in 0..self.parent.len() { - let k = *get_unchecked(&self.parent, ix); - let xrep = self.find_mut_recursive(k); - *self.parent.get_unchecked_mut(ix) = xrep; - } - } - self.parent - } -} diff --git a/vendor/petgraph/src/util.rs b/vendor/petgraph/src/util.rs deleted file mode 100644 index 980e6041..00000000 --- a/vendor/petgraph/src/util.rs +++ /dev/null @@ -1,16 +0,0 @@ -use std::iter; - -pub fn enumerate<I>(iterable: I) -> iter::Enumerate<I::IntoIter> -where - I: IntoIterator, -{ - iterable.into_iter().enumerate() -} - -pub fn zip<I, J>(i: I, j: J) -> iter::Zip<I::IntoIter, J::IntoIter> -where - I: IntoIterator, - J: IntoIterator, -{ - i.into_iter().zip(j) -} diff --git a/vendor/petgraph/src/visit/dfsvisit.rs b/vendor/petgraph/src/visit/dfsvisit.rs deleted file mode 100644 index d2eb5d4a..00000000 --- a/vendor/petgraph/src/visit/dfsvisit.rs +++ /dev/null @@ -1,314 +0,0 @@ -use crate::visit::IntoNeighbors; -use crate::visit::{VisitMap, Visitable}; - -/// Strictly monotonically increasing event time for a depth first search. -#[derive(Copy, Clone, Debug, PartialEq, PartialOrd, Eq, Ord, Default, Hash)] -pub struct Time(pub usize); - -/// A depth first search (DFS) visitor event. -#[derive(Copy, Clone, Debug)] -pub enum DfsEvent<N> { - Discover(N, Time), - /// An edge of the tree formed by the traversal. - TreeEdge(N, N), - /// An edge to an already visited node. - BackEdge(N, N), - /// A cross or forward edge. - /// - /// For an edge *(u, v)*, if the discover time of *v* is greater than *u*, - /// then it is a forward edge, else a cross edge. - CrossForwardEdge(N, N), - /// All edges from a node have been reported. - Finish(N, Time), -} - -/// Return if the expression is a break value, execute the provided statement -/// if it is a prune value. -macro_rules! try_control { - ($e:expr, $p:stmt) => { - try_control!($e, $p, ()); - }; - ($e:expr, $p:stmt, $q:stmt) => { - match $e { - x => { - if x.should_break() { - return x; - } else if x.should_prune() { - $p - } else { - $q - } - } - } - }; -} - -/// Control flow for `depth_first_search` callbacks. -#[derive(Copy, Clone, Debug)] -pub enum Control<B> { - /// Continue the DFS traversal as normal. - Continue, - /// Prune the current node from the DFS traversal. No more edges from this - /// node will be reported to the callback. A `DfsEvent::Finish` for this - /// node will still be reported. This can be returned in response to any - /// `DfsEvent`, except `Finish`, which will panic. - Prune, - /// Stop the DFS traversal and return the provided value. - Break(B), -} - -impl<B> Control<B> { - pub fn breaking() -> Control<()> { - Control::Break(()) - } - /// Get the value in `Control::Break(_)`, if present. - pub fn break_value(self) -> Option<B> { - match self { - Control::Continue | Control::Prune => None, - Control::Break(b) => Some(b), - } - } -} - -/// Control flow for callbacks. -/// -/// The empty return value `()` is equivalent to continue. -pub trait ControlFlow { - fn continuing() -> Self; - fn should_break(&self) -> bool; - fn should_prune(&self) -> bool; -} - -impl ControlFlow for () { - fn continuing() {} - #[inline] - fn should_break(&self) -> bool { - false - } - #[inline] - fn should_prune(&self) -> bool { - false - } -} - -impl<B> ControlFlow for Control<B> { - fn continuing() -> Self { - Control::Continue - } - fn should_break(&self) -> bool { - if let Control::Break(_) = *self { - true - } else { - false - } - } - fn should_prune(&self) -> bool { - match *self { - Control::Prune => true, - Control::Continue | Control::Break(_) => false, - } - } -} - -impl<C: ControlFlow, E> ControlFlow for Result<C, E> { - fn continuing() -> Self { - Ok(C::continuing()) - } - fn should_break(&self) -> bool { - if let Ok(ref c) = *self { - c.should_break() - } else { - true - } - } - fn should_prune(&self) -> bool { - if let Ok(ref c) = *self { - c.should_prune() - } else { - false - } - } -} - -/// The default is `Continue`. -impl<B> Default for Control<B> { - fn default() -> Self { - Control::Continue - } -} - -/// A recursive depth first search. -/// -/// Starting points are the nodes in the iterator `starts` (specify just one -/// start vertex *x* by using `Some(x)`). -/// -/// The traversal emits discovery and finish events for each reachable vertex, -/// and edge classification of each reachable edge. `visitor` is called for each -/// event, see [`DfsEvent`][de] for possible values. -/// -/// The return value should implement the trait `ControlFlow`, and can be used to change -/// the control flow of the search. -/// -/// `Control` Implements `ControlFlow` such that `Control::Continue` resumes the search. -/// `Control::Break` will stop the visit early, returning the contained value. -/// `Control::Prune` will stop traversing any additional edges from the current -/// node and proceed immediately to the `Finish` event. -/// -/// There are implementations of `ControlFlow` for `()`, and `Result<C, E>` where -/// `C: ControlFlow`. The implementation for `()` will continue until finished. -/// For `Result`, upon encountering an `E` it will break, otherwise acting the same as `C`. -/// -/// ***Panics** if you attempt to prune a node from its `Finish` event. -/// -/// [de]: enum.DfsEvent.html -/// -/// # Example returning `Control`. -/// -/// Find a path from vertex 0 to 5, and exit the visit as soon as we reach -/// the goal vertex. -/// -/// ``` -/// use petgraph::prelude::*; -/// use petgraph::graph::node_index as n; -/// use petgraph::visit::depth_first_search; -/// use petgraph::visit::{DfsEvent, Control}; -/// -/// let gr: Graph<(), ()> = Graph::from_edges(&[ -/// (0, 1), (0, 2), (0, 3), -/// (1, 3), -/// (2, 3), (2, 4), -/// (4, 0), (4, 5), -/// ]); -/// -/// // record each predecessor, mapping node → node -/// let mut predecessor = vec![NodeIndex::end(); gr.node_count()]; -/// let start = n(0); -/// let goal = n(5); -/// depth_first_search(&gr, Some(start), |event| { -/// if let DfsEvent::TreeEdge(u, v) = event { -/// predecessor[v.index()] = u; -/// if v == goal { -/// return Control::Break(v); -/// } -/// } -/// Control::Continue -/// }); -/// -/// let mut next = goal; -/// let mut path = vec![next]; -/// while next != start { -/// let pred = predecessor[next.index()]; -/// path.push(pred); -/// next = pred; -/// } -/// path.reverse(); -/// assert_eq!(&path, &[n(0), n(2), n(4), n(5)]); -/// ``` -/// -/// # Example returning a `Result`. -/// ``` -/// use petgraph::graph::node_index as n; -/// use petgraph::prelude::*; -/// use petgraph::visit::depth_first_search; -/// use petgraph::visit::{DfsEvent, Time}; -/// -/// let gr: Graph<(), ()> = Graph::from_edges(&[(0, 1), (1, 2), (1, 1), (2, 1)]); -/// let start = n(0); -/// let mut back_edges = 0; -/// let mut discover_time = 0; -/// // Stop the search, the first time a BackEdge is encountered. -/// let result = depth_first_search(&gr, Some(start), |event| { -/// match event { -/// // In the cases where Ok(()) is returned, -/// // Result falls back to the implementation of Control on the value (). -/// // In the case of (), this is to always return Control::Continue. -/// // continuing the search. -/// DfsEvent::Discover(_, Time(t)) => { -/// discover_time = t; -/// Ok(()) -/// } -/// DfsEvent::BackEdge(_, _) => { -/// back_edges += 1; -/// // the implementation of ControlFlow for Result, -/// // treats this Err value as Continue::Break -/// Err(event) -/// } -/// _ => Ok(()), -/// } -/// }); -/// -/// // Even though the graph has more than one cycle, -/// // The number of back_edges visited by the search should always be 1. -/// assert_eq!(back_edges, 1); -/// println!("discover time:{:?}", discover_time); -/// println!("number of backedges encountered: {}", back_edges); -/// println!("back edge: {:?}", result); -/// ``` -pub fn depth_first_search<G, I, F, C>(graph: G, starts: I, mut visitor: F) -> C -where - G: IntoNeighbors + Visitable, - I: IntoIterator<Item = G::NodeId>, - F: FnMut(DfsEvent<G::NodeId>) -> C, - C: ControlFlow, -{ - let time = &mut Time(0); - let discovered = &mut graph.visit_map(); - let finished = &mut graph.visit_map(); - - for start in starts { - try_control!( - dfs_visitor(graph, start, &mut visitor, discovered, finished, time), - unreachable!() - ); - } - C::continuing() -} - -pub(crate) fn dfs_visitor<G, F, C>( - graph: G, - u: G::NodeId, - visitor: &mut F, - discovered: &mut impl VisitMap<G::NodeId>, - finished: &mut impl VisitMap<G::NodeId>, - time: &mut Time, -) -> C -where - G: IntoNeighbors + Visitable, - F: FnMut(DfsEvent<G::NodeId>) -> C, - C: ControlFlow, -{ - if !discovered.visit(u) { - return C::continuing(); - } - - try_control!( - visitor(DfsEvent::Discover(u, time_post_inc(time))), - {}, - for v in graph.neighbors(u) { - if !discovered.is_visited(&v) { - try_control!(visitor(DfsEvent::TreeEdge(u, v)), continue); - try_control!( - dfs_visitor(graph, v, visitor, discovered, finished, time), - unreachable!() - ); - } else if !finished.is_visited(&v) { - try_control!(visitor(DfsEvent::BackEdge(u, v)), continue); - } else { - try_control!(visitor(DfsEvent::CrossForwardEdge(u, v)), continue); - } - } - ); - let first_finish = finished.visit(u); - debug_assert!(first_finish); - try_control!( - visitor(DfsEvent::Finish(u, time_post_inc(time))), - panic!("Pruning on the `DfsEvent::Finish` is not supported!") - ); - C::continuing() -} - -fn time_post_inc(x: &mut Time) -> Time { - let v = *x; - x.0 += 1; - v -} diff --git a/vendor/petgraph/src/visit/filter.rs b/vendor/petgraph/src/visit/filter.rs deleted file mode 100644 index 496f57f5..00000000 --- a/vendor/petgraph/src/visit/filter.rs +++ /dev/null @@ -1,583 +0,0 @@ -use crate::prelude::*; - -use fixedbitset::FixedBitSet; -use std::collections::HashSet; -use std::marker::PhantomData; - -use crate::data::DataMap; -use crate::visit::{Data, NodeCompactIndexable, NodeCount}; -use crate::visit::{ - EdgeIndexable, GraphBase, GraphProp, IntoEdgeReferences, IntoEdges, IntoEdgesDirected, - IntoNeighbors, IntoNeighborsDirected, IntoNodeIdentifiers, IntoNodeReferences, NodeIndexable, - NodeRef, VisitMap, Visitable, -}; - -/// A graph filter for nodes. -pub trait FilterNode<N> { - /// Return true to have the node be part of the graph - fn include_node(&self, node: N) -> bool; -} - -impl<F, N> FilterNode<N> for F -where - F: Fn(N) -> bool, -{ - fn include_node(&self, n: N) -> bool { - (*self)(n) - } -} - -/// This filter includes the nodes that are contained in the set. -impl<N> FilterNode<N> for FixedBitSet -where - FixedBitSet: VisitMap<N>, -{ - fn include_node(&self, n: N) -> bool { - self.is_visited(&n) - } -} - -/// This filter includes the nodes that are contained in the set. -impl<N, S> FilterNode<N> for HashSet<N, S> -where - HashSet<N, S>: VisitMap<N>, -{ - fn include_node(&self, n: N) -> bool { - self.is_visited(&n) - } -} - -// Can't express these as a generic impl over all references since that would conflict with the -// impl for Fn. -impl<N> FilterNode<N> for &FixedBitSet -where - FixedBitSet: VisitMap<N>, -{ - fn include_node(&self, n: N) -> bool { - self.is_visited(&n) - } -} - -impl<N, S> FilterNode<N> for &HashSet<N, S> -where - HashSet<N, S>: VisitMap<N>, -{ - fn include_node(&self, n: N) -> bool { - self.is_visited(&n) - } -} - -/// A node-filtering graph adaptor. -#[derive(Copy, Clone, Debug)] -pub struct NodeFiltered<G, F>(pub G, pub F); - -impl<F, G> NodeFiltered<G, F> -where - G: GraphBase, - F: Fn(G::NodeId) -> bool, -{ - /// Create an `NodeFiltered` adaptor from the closure `filter`. - pub fn from_fn(graph: G, filter: F) -> Self { - NodeFiltered(graph, filter) - } -} - -impl<G, F> GraphBase for NodeFiltered<G, F> -where - G: GraphBase, -{ - type NodeId = G::NodeId; - type EdgeId = G::EdgeId; -} - -impl<'a, G, F> IntoNeighbors for &'a NodeFiltered<G, F> -where - G: IntoNeighbors, - F: FilterNode<G::NodeId>, -{ - type Neighbors = NodeFilteredNeighbors<'a, G::Neighbors, F>; - fn neighbors(self, n: G::NodeId) -> Self::Neighbors { - NodeFilteredNeighbors { - include_source: self.1.include_node(n), - iter: self.0.neighbors(n), - f: &self.1, - } - } -} - -/// A filtered neighbors iterator. -#[derive(Debug, Clone)] -pub struct NodeFilteredNeighbors<'a, I, F: 'a> { - include_source: bool, - iter: I, - f: &'a F, -} - -impl<I, F> Iterator for NodeFilteredNeighbors<'_, I, F> -where - I: Iterator, - I::Item: Copy, - F: FilterNode<I::Item>, -{ - type Item = I::Item; - fn next(&mut self) -> Option<Self::Item> { - let f = self.f; - if !self.include_source { - None - } else { - self.iter.find(move |&target| f.include_node(target)) - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<'a, G, F> IntoNeighborsDirected for &'a NodeFiltered<G, F> -where - G: IntoNeighborsDirected, - F: FilterNode<G::NodeId>, -{ - type NeighborsDirected = NodeFilteredNeighbors<'a, G::NeighborsDirected, F>; - fn neighbors_directed(self, n: G::NodeId, dir: Direction) -> Self::NeighborsDirected { - NodeFilteredNeighbors { - include_source: self.1.include_node(n), - iter: self.0.neighbors_directed(n, dir), - f: &self.1, - } - } -} - -impl<'a, G, F> IntoNodeIdentifiers for &'a NodeFiltered<G, F> -where - G: IntoNodeIdentifiers, - F: FilterNode<G::NodeId>, -{ - type NodeIdentifiers = NodeFilteredNeighbors<'a, G::NodeIdentifiers, F>; - fn node_identifiers(self) -> Self::NodeIdentifiers { - NodeFilteredNeighbors { - include_source: true, - iter: self.0.node_identifiers(), - f: &self.1, - } - } -} - -impl<'a, G, F> IntoNodeReferences for &'a NodeFiltered<G, F> -where - G: IntoNodeReferences, - F: FilterNode<G::NodeId>, -{ - type NodeRef = G::NodeRef; - type NodeReferences = NodeFilteredNodes<'a, G::NodeReferences, F>; - fn node_references(self) -> Self::NodeReferences { - NodeFilteredNodes { - include_source: true, - iter: self.0.node_references(), - f: &self.1, - } - } -} - -/// A filtered node references iterator. -#[derive(Debug, Clone)] -pub struct NodeFilteredNodes<'a, I, F: 'a> { - include_source: bool, - iter: I, - f: &'a F, -} - -impl<I, F> Iterator for NodeFilteredNodes<'_, I, F> -where - I: Iterator, - I::Item: Copy + NodeRef, - F: FilterNode<<I::Item as NodeRef>::NodeId>, -{ - type Item = I::Item; - fn next(&mut self) -> Option<Self::Item> { - let f = self.f; - if !self.include_source { - None - } else { - self.iter.find(move |&target| f.include_node(target.id())) - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<'a, G, F> IntoEdgeReferences for &'a NodeFiltered<G, F> -where - G: IntoEdgeReferences, - F: FilterNode<G::NodeId>, -{ - type EdgeRef = G::EdgeRef; - type EdgeReferences = NodeFilteredEdgeReferences<'a, G, G::EdgeReferences, F>; - fn edge_references(self) -> Self::EdgeReferences { - NodeFilteredEdgeReferences { - graph: PhantomData, - iter: self.0.edge_references(), - f: &self.1, - } - } -} - -/// A filtered edges iterator. -#[derive(Debug, Clone)] -pub struct NodeFilteredEdgeReferences<'a, G, I, F: 'a> { - graph: PhantomData<G>, - iter: I, - f: &'a F, -} - -impl<G, I, F> Iterator for NodeFilteredEdgeReferences<'_, G, I, F> -where - F: FilterNode<G::NodeId>, - G: IntoEdgeReferences, - I: Iterator<Item = G::EdgeRef>, -{ - type Item = I::Item; - fn next(&mut self) -> Option<Self::Item> { - let f = self.f; - self.iter - .find(move |&edge| f.include_node(edge.source()) && f.include_node(edge.target())) - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<'a, G, F> IntoEdges for &'a NodeFiltered<G, F> -where - G: IntoEdges, - F: FilterNode<G::NodeId>, -{ - type Edges = NodeFilteredEdges<'a, G, G::Edges, F>; - fn edges(self, a: G::NodeId) -> Self::Edges { - NodeFilteredEdges { - graph: PhantomData, - include_source: self.1.include_node(a), - iter: self.0.edges(a), - f: &self.1, - dir: Direction::Outgoing, - } - } -} - -impl<'a, G, F> IntoEdgesDirected for &'a NodeFiltered<G, F> -where - G: IntoEdgesDirected, - F: FilterNode<G::NodeId>, -{ - type EdgesDirected = NodeFilteredEdges<'a, G, G::EdgesDirected, F>; - fn edges_directed(self, a: G::NodeId, dir: Direction) -> Self::EdgesDirected { - NodeFilteredEdges { - graph: PhantomData, - include_source: self.1.include_node(a), - iter: self.0.edges_directed(a, dir), - f: &self.1, - dir, - } - } -} - -/// A filtered edges iterator. -#[derive(Debug, Clone)] -pub struct NodeFilteredEdges<'a, G, I, F: 'a> { - graph: PhantomData<G>, - include_source: bool, - iter: I, - f: &'a F, - dir: Direction, -} - -impl<G, I, F> Iterator for NodeFilteredEdges<'_, G, I, F> -where - F: FilterNode<G::NodeId>, - G: IntoEdges, - I: Iterator<Item = G::EdgeRef>, -{ - type Item = I::Item; - fn next(&mut self) -> Option<Self::Item> { - if !self.include_source { - None - } else { - let dir = self.dir; - let f = self.f; - self.iter.find(move |&edge| { - f.include_node(match dir { - Direction::Outgoing => edge.target(), - Direction::Incoming => edge.source(), - }) - }) - } - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<G, F> DataMap for NodeFiltered<G, F> -where - G: DataMap, - F: FilterNode<G::NodeId>, -{ - fn node_weight(&self, id: Self::NodeId) -> Option<&Self::NodeWeight> { - if self.1.include_node(id) { - self.0.node_weight(id) - } else { - None - } - } - - fn edge_weight(&self, id: Self::EdgeId) -> Option<&Self::EdgeWeight> { - self.0.edge_weight(id) - } -} - -macro_rules! access0 { - ($e:expr) => { - $e.0 - }; -} - -Data! {delegate_impl [[G, F], G, NodeFiltered<G, F>, access0]} -NodeIndexable! {delegate_impl [[G, F], G, NodeFiltered<G, F>, access0]} -EdgeIndexable! {delegate_impl [[G, F], G, NodeFiltered<G, F>, access0]} -GraphProp! {delegate_impl [[G, F], G, NodeFiltered<G, F>, access0]} -Visitable! {delegate_impl [[G, F], G, NodeFiltered<G, F>, access0]} - -/// A graph filter for edges -pub trait FilterEdge<Edge> { - /// Return true to have the edge be part of the graph - fn include_edge(&self, edge: Edge) -> bool; -} - -impl<F, N> FilterEdge<N> for F -where - F: Fn(N) -> bool, -{ - fn include_edge(&self, n: N) -> bool { - (*self)(n) - } -} - -/// An edge-filtering graph adaptor. -/// -/// The adaptor may filter out edges. The filter implements the trait -/// `FilterEdge`. Closures of type `Fn(G::EdgeRef) -> bool` already -/// implement this trait. -/// -/// The filter may use edge source, target, id, and weight to select whether to -/// include the edge or not. -#[derive(Copy, Clone, Debug)] -pub struct EdgeFiltered<G, F>(pub G, pub F); - -impl<F, G> EdgeFiltered<G, F> -where - G: IntoEdgeReferences, - F: Fn(G::EdgeRef) -> bool, -{ - /// Create an `EdgeFiltered` adaptor from the closure `filter`. - pub fn from_fn(graph: G, filter: F) -> Self { - EdgeFiltered(graph, filter) - } -} - -impl<G, F> GraphBase for EdgeFiltered<G, F> -where - G: GraphBase, -{ - type NodeId = G::NodeId; - type EdgeId = G::EdgeId; -} - -impl<'a, G, F> IntoNeighbors for &'a EdgeFiltered<G, F> -where - G: IntoEdges, - F: FilterEdge<G::EdgeRef>, -{ - type Neighbors = EdgeFilteredNeighbors<'a, G, F>; - fn neighbors(self, n: G::NodeId) -> Self::Neighbors { - EdgeFilteredNeighbors { - iter: self.0.edges(n), - f: &self.1, - } - } -} - -impl<'a, G, F> IntoNeighborsDirected for &'a EdgeFiltered<G, F> -where - G: IntoEdgesDirected, - F: FilterEdge<G::EdgeRef>, -{ - type NeighborsDirected = EdgeFilteredNeighborsDirected<'a, G, F>; - fn neighbors_directed(self, n: G::NodeId, dir: Direction) -> Self::NeighborsDirected { - EdgeFilteredNeighborsDirected { - iter: self.0.edges_directed(n, dir), - f: &self.1, - from: n, - } - } -} - -/// A filtered neighbors iterator. -#[derive(Debug, Clone)] -pub struct EdgeFilteredNeighbors<'a, G, F: 'a> -where - G: IntoEdges, -{ - iter: G::Edges, - f: &'a F, -} - -impl<G, F> Iterator for EdgeFilteredNeighbors<'_, G, F> -where - F: FilterEdge<G::EdgeRef>, - G: IntoEdges, -{ - type Item = G::NodeId; - fn next(&mut self) -> Option<Self::Item> { - let f = self.f; - (&mut self.iter) - .filter_map(move |edge| { - if f.include_edge(edge) { - Some(edge.target()) - } else { - None - } - }) - .next() - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -impl<'a, G, F> IntoEdgeReferences for &'a EdgeFiltered<G, F> -where - G: IntoEdgeReferences, - F: FilterEdge<G::EdgeRef>, -{ - type EdgeRef = G::EdgeRef; - type EdgeReferences = EdgeFilteredEdges<'a, G, G::EdgeReferences, F>; - fn edge_references(self) -> Self::EdgeReferences { - EdgeFilteredEdges { - graph: PhantomData, - iter: self.0.edge_references(), - f: &self.1, - } - } -} - -impl<'a, G, F> IntoEdges for &'a EdgeFiltered<G, F> -where - G: IntoEdges, - F: FilterEdge<G::EdgeRef>, -{ - type Edges = EdgeFilteredEdges<'a, G, G::Edges, F>; - fn edges(self, n: G::NodeId) -> Self::Edges { - EdgeFilteredEdges { - graph: PhantomData, - iter: self.0.edges(n), - f: &self.1, - } - } -} - -impl<'a, G, F> IntoEdgesDirected for &'a EdgeFiltered<G, F> -where - G: IntoEdgesDirected, - F: FilterEdge<G::EdgeRef>, -{ - type EdgesDirected = EdgeFilteredEdges<'a, G, G::EdgesDirected, F>; - - fn edges_directed(self, n: G::NodeId, dir: Direction) -> Self::EdgesDirected { - EdgeFilteredEdges { - graph: PhantomData, - iter: self.0.edges_directed(n, dir), - f: &self.1, - } - } -} - -/// A filtered edges iterator. -#[derive(Debug, Clone)] -pub struct EdgeFilteredEdges<'a, G, I, F: 'a> { - graph: PhantomData<G>, - iter: I, - f: &'a F, -} - -impl<G, I, F> Iterator for EdgeFilteredEdges<'_, G, I, F> -where - F: FilterEdge<G::EdgeRef>, - G: IntoEdgeReferences, - I: Iterator<Item = G::EdgeRef>, -{ - type Item = I::Item; - fn next(&mut self) -> Option<Self::Item> { - let f = self.f; - self.iter.find(move |&edge| f.include_edge(edge)) - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -/// A filtered neighbors-directed iterator. -#[derive(Debug, Clone)] -pub struct EdgeFilteredNeighborsDirected<'a, G, F: 'a> -where - G: IntoEdgesDirected, -{ - iter: G::EdgesDirected, - f: &'a F, - from: G::NodeId, -} - -impl<G, F> Iterator for EdgeFilteredNeighborsDirected<'_, G, F> -where - F: FilterEdge<G::EdgeRef>, - G: IntoEdgesDirected, -{ - type Item = G::NodeId; - fn next(&mut self) -> Option<Self::Item> { - let f = self.f; - let from = self.from; - (&mut self.iter) - .filter_map(move |edge| { - if f.include_edge(edge) { - if edge.source() != from { - Some(edge.source()) - } else { - Some(edge.target()) // includes case where from == source == target - } - } else { - None - } - }) - .next() - } - fn size_hint(&self) -> (usize, Option<usize>) { - let (_, upper) = self.iter.size_hint(); - (0, upper) - } -} - -Data! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} -GraphProp! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} -IntoNodeIdentifiers! {delegate_impl [['a, G, F], G, &'a EdgeFiltered<G, F>, access0]} -IntoNodeReferences! {delegate_impl [['a, G, F], G, &'a EdgeFiltered<G, F>, access0]} -NodeCompactIndexable! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} -NodeCount! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} -NodeIndexable! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} -EdgeIndexable! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} -Visitable! {delegate_impl [[G, F], G, EdgeFiltered<G, F>, access0]} diff --git a/vendor/petgraph/src/visit/macros.rs b/vendor/petgraph/src/visit/macros.rs deleted file mode 100644 index 1b36030d..00000000 --- a/vendor/petgraph/src/visit/macros.rs +++ /dev/null @@ -1,135 +0,0 @@ -/// Define a trait as usual, and a macro that can be used to instantiate -/// implementations of it. -/// -/// There *must* be section markers in the trait definition: -/// @section type for associated types -/// @section self for methods -/// @section nodelegate for arbitrary tail that is not forwarded. -macro_rules! trait_template { - ($(#[$doc:meta])* pub trait $name:ident $($methods:tt)*) => { - macro_rules! $name { - ($m:ident $extra:tt) => { - $m! { - $extra - pub trait $name $($methods)* - } - } - } - - remove_sections! { [] - $(#[$doc])* - pub trait $name $($methods)* - - // This is where the trait definition is reproduced by the macro. - // It makes the source links point to this place! - // - // I'm sorry, you'll have to find the source by looking at the - // source of the module the trait is defined in. - // - // We use this nifty macro so that we can automatically generate - // delegation trait impls and implement the graph traits for more - // types and combinators. - } - } -} - -macro_rules! remove_sections_inner { - ([$($stack:tt)*]) => { - $($stack)* - }; - // escape the following tt - ([$($stack:tt)*] @escape $_x:tt $($t:tt)*) => { - remove_sections_inner!([$($stack)*] $($t)*); - }; - ([$($stack:tt)*] @section $x:ident $($t:tt)*) => { - remove_sections_inner!([$($stack)*] $($t)*); - }; - ([$($stack:tt)*] $t:tt $($tail:tt)*) => { - remove_sections_inner!([$($stack)* $t] $($tail)*); - }; -} - -// This is the outer layer, just find the { } of the actual trait definition -// recurse once into { }, but not more. -macro_rules! remove_sections { - ([$($stack:tt)*]) => { - $($stack)* - }; - ([$($stack:tt)*] { $($tail:tt)* }) => { - $($stack)* { - remove_sections_inner!([] $($tail)*); - } - }; - ([$($stack:tt)*] $t:tt $($tail:tt)*) => { - remove_sections!([$($stack)* $t] $($tail)*); - }; -} - -macro_rules! deref { - ($e:expr) => { - *$e - }; -} -macro_rules! deref_twice { - ($e:expr) => { - **$e - }; -} - -/// Implement a trait by delegation. By default as if we are delegating -/// from &G to G. -macro_rules! delegate_impl { - ([] $($rest:tt)*) => { - delegate_impl! { [['a, G], G, &'a G, deref] $($rest)* } - }; - ([[$($param:tt)*], $self_type:ident, $self_wrap:ty, $self_map:ident] - pub trait $name:ident $(: $sup:ident)* $(+ $more_sup:ident)* { - - // "Escaped" associated types. Stripped before making the `trait` - // itself, but forwarded when delegating impls. - $( - @escape [type $assoc_name_ext:ident] - // Associated types. Forwarded. - )* - $( - @section type - $( - $(#[$_assoc_attr:meta])* - type $assoc_name:ident $(: $assoc_bound:ty)*; - )+ - )* - // Methods. Forwarded. Using $self_map!(self) around the self argument. - // Methods must use receiver `self` or explicit type like `self: &Self` - // &self and &mut self are _not_ supported. - $( - @section self - $( - $(#[$_method_attr:meta])* - fn $method_name:ident(self $(: $self_selftype:ty)* $(,$marg:ident : $marg_ty:ty)*) $(-> $mret:ty)?; - )+ - )* - // Arbitrary tail that is ignored when forwarding. - $( - @section nodelegate - $($tail:tt)* - )* - }) => { - impl<$($param)*> $name for $self_wrap where $self_type: $name { - $( - $( - type $assoc_name = $self_type::$assoc_name; - )* - )* - $( - type $assoc_name_ext = $self_type::$assoc_name_ext; - )* - $( - $( - fn $method_name(self $(: $self_selftype)* $(,$marg: $marg_ty)*) $(-> $mret)? { - $self_map!(self).$method_name($($marg),*) - } - )* - )* - } - } -} diff --git a/vendor/petgraph/src/visit/mod.rs b/vendor/petgraph/src/visit/mod.rs deleted file mode 100644 index bc152560..00000000 --- a/vendor/petgraph/src/visit/mod.rs +++ /dev/null @@ -1,481 +0,0 @@ -//! Graph traits and graph traversals. -//! -//! ### The `Into-` Traits -//! -//! Graph traits like [`IntoNeighbors`][in] create iterators and use the same -//! pattern that `IntoIterator` does: the trait takes a reference to a graph, -//! and produces an iterator. These traits are quite composable, but with the -//! limitation that they only use shared references to graphs. -//! -//! ### Graph Traversal -//! -//! [`Dfs`](struct.Dfs.html), [`Bfs`][bfs], [`DfsPostOrder`][dfspo] and -//! [`Topo`][topo] are basic visitors and they use “walker” methods: the -//! visitors don't hold the graph as borrowed during traversal, only for the -//! `.next()` call on the walker. They can be converted to iterators -//! through the [`Walker`][w] trait. -//! -//! There is also the callback based traversal [`depth_first_search`][dfs]. -//! -//! [bfs]: struct.Bfs.html -//! [dfspo]: struct.DfsPostOrder.html -//! [topo]: struct.Topo.html -//! [dfs]: fn.depth_first_search.html -//! [w]: trait.Walker.html -//! -//! ### Other Graph Traits -//! -//! The traits are rather loosely coupled at the moment (which is intentional, -//! but will develop a bit), and there are traits missing that could be added. -//! -//! Not much is needed to be able to use the visitors on a graph. A graph -//! needs to define [`GraphBase`][gb], [`IntoNeighbors`][in] and -//! [`Visitable`][vis] as a minimum. -//! -//! [gb]: trait.GraphBase.html -//! [in]: trait.IntoNeighbors.html -//! [vis]: trait.Visitable.html -//! -//! ### Graph Trait Implementations -//! -//! The following table lists the traits that are implemented for each graph type: -//! -//! | | Graph | StableGraph | GraphMap | MatrixGraph | Csr | List | -//! | --------------------- | :---: | :---------: | :------: | :---------: | :---: | :---: | -//! | GraphBase | x | x | x | x | x | x | -//! | GraphProp | x | x | x | x | x | x | -//! | NodeCount | x | x | x | x | x | x | -//! | NodeIndexable | x | x | x | x | x | x | -//! | NodeCompactIndexable | x | | x | | x | x | -//! | EdgeCount | x | x | x | x | x | x | -//! | EdgeIndexable | x | x | x | | | | -//! | Data | x | x | x | x | x | x | -//! | IntoNodeIdentifiers | x | x | x | x | x | x | -//! | IntoNodeReferences | x | x | x | x | x | x | -//! | IntoEdgeReferences | x | x | x | x | x | x | -//! | IntoNeighbors | x | x | x | x | x | x | -//! | IntoNeighborsDirected | x | x | x | x | | | -//! | IntoEdges | x | x | x | x | x | x | -//! | IntoEdgesDirected | x | x | x | x | | | -//! | Visitable | x | x | x | x | x | x | -//! | GetAdjacencyMatrix | x | x | x | x | x | x | - -// filter, reversed have their `mod` lines at the end, -// so that they can use the trait template macros -pub use self::filter::*; -pub use self::reversed::*; -pub use self::undirected_adaptor::*; - -#[macro_use] -mod macros; - -mod dfsvisit; -mod traversal; -pub use self::dfsvisit::*; -pub use self::traversal::*; - -use fixedbitset::FixedBitSet; -use std::collections::HashSet; -use std::hash::{BuildHasher, Hash}; - -use super::EdgeType; -use crate::prelude::Direction; - -use crate::graph::IndexType; - -trait_template! { -/// Base graph trait: defines the associated node identifier and -/// edge identifier types. -pub trait GraphBase { - // FIXME: We can drop this escape/nodelegate stuff in Rust 1.18 - @escape [type NodeId] - @escape [type EdgeId] - @section nodelegate - /// edge identifier - type EdgeId: Copy + PartialEq; - /// node identifier - type NodeId: Copy + PartialEq; -} -} - -GraphBase! {delegate_impl []} -GraphBase! {delegate_impl [['a, G], G, &'a mut G, deref]} - -/// A copyable reference to a graph. -pub trait GraphRef: Copy + GraphBase {} - -impl<G> GraphRef for &G where G: GraphBase {} - -trait_template! { -/// Access to the neighbors of each node -/// -/// The neighbors are, depending on the graph’s edge type: -/// -/// - `Directed`: All targets of edges from `a`. -/// - `Undirected`: All other endpoints of edges connected to `a`. -pub trait IntoNeighbors : GraphRef { - @section type - type Neighbors: Iterator<Item=Self::NodeId>; - @section self - /// Return an iterator of the neighbors of node `a`. - fn neighbors(self, a: Self::NodeId) -> Self::Neighbors; -} -} - -IntoNeighbors! {delegate_impl []} - -trait_template! { -/// Access to the neighbors of each node, through incoming or outgoing edges. -/// -/// Depending on the graph’s edge type, the neighbors of a given directionality -/// are: -/// -/// - `Directed`, `Outgoing`: All targets of edges from `a`. -/// - `Directed`, `Incoming`: All sources of edges to `a`. -/// - `Undirected`: All other endpoints of edges connected to `a`. -pub trait IntoNeighborsDirected : IntoNeighbors { - @section type - type NeighborsDirected: Iterator<Item=Self::NodeId>; - @section self - fn neighbors_directed(self, n: Self::NodeId, d: Direction) - -> Self::NeighborsDirected; -} -} - -trait_template! { -/// Access to the edges of each node. -/// -/// The edges are, depending on the graph’s edge type: -/// -/// - `Directed`: All edges from `a`. -/// - `Undirected`: All edges connected to `a`, with `a` being the source of each edge. -/// -/// This is an extended version of the trait `IntoNeighbors`; the former -/// only iterates over the target node identifiers, while this trait -/// yields edge references (trait [`EdgeRef`][er]). -/// -/// [er]: trait.EdgeRef.html -pub trait IntoEdges : IntoEdgeReferences + IntoNeighbors { - @section type - type Edges: Iterator<Item=Self::EdgeRef>; - @section self - fn edges(self, a: Self::NodeId) -> Self::Edges; -} -} - -IntoEdges! {delegate_impl []} - -trait_template! { -/// Access to all edges of each node, in the specified direction. -/// -/// The edges are, depending on the direction and the graph’s edge type: -/// -/// -/// - `Directed`, `Outgoing`: All edges from `a`. -/// - `Directed`, `Incoming`: All edges to `a`. -/// - `Undirected`, `Outgoing`: All edges connected to `a`, with `a` being the source of each edge. -/// - `Undirected`, `Incoming`: All edges connected to `a`, with `a` being the target of each edge. -/// -/// This is an extended version of the trait `IntoNeighborsDirected`; the former -/// only iterates over the target node identifiers, while this trait -/// yields edge references (trait [`EdgeRef`][er]). -/// -/// [er]: trait.EdgeRef.html -pub trait IntoEdgesDirected : IntoEdges + IntoNeighborsDirected { - @section type - type EdgesDirected: Iterator<Item=Self::EdgeRef>; - @section self - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::EdgesDirected; -} -} - -IntoEdgesDirected! {delegate_impl []} - -trait_template! { -/// Access to the sequence of the graph’s `NodeId`s. -pub trait IntoNodeIdentifiers : GraphRef { - @section type - type NodeIdentifiers: Iterator<Item=Self::NodeId>; - @section self - fn node_identifiers(self) -> Self::NodeIdentifiers; -} -} - -IntoNodeIdentifiers! {delegate_impl []} -IntoNeighborsDirected! {delegate_impl []} - -trait_template! { -/// Define associated data for nodes and edges -pub trait Data : GraphBase { - @section type - type NodeWeight; - type EdgeWeight; -} -} - -Data! {delegate_impl []} -Data! {delegate_impl [['a, G], G, &'a mut G, deref]} - -/// An edge reference. -/// -/// Edge references are used by traits `IntoEdges` and `IntoEdgeReferences`. -pub trait EdgeRef: Copy { - type NodeId; - type EdgeId; - type Weight; - /// The source node of the edge. - fn source(&self) -> Self::NodeId; - /// The target node of the edge. - fn target(&self) -> Self::NodeId; - /// A reference to the weight of the edge. - fn weight(&self) -> &Self::Weight; - /// The edge’s identifier. - fn id(&self) -> Self::EdgeId; -} - -impl<N, E> EdgeRef for (N, N, &E) -where - N: Copy, -{ - type NodeId = N; - type EdgeId = (N, N); - type Weight = E; - - fn source(&self) -> N { - self.0 - } - fn target(&self) -> N { - self.1 - } - fn weight(&self) -> &E { - self.2 - } - fn id(&self) -> (N, N) { - (self.0, self.1) - } -} - -/// A node reference. -pub trait NodeRef: Copy { - type NodeId; - type Weight; - fn id(&self) -> Self::NodeId; - fn weight(&self) -> &Self::Weight; -} - -trait_template! { -/// Access to the sequence of the graph’s nodes -pub trait IntoNodeReferences : Data + IntoNodeIdentifiers { - @section type - type NodeRef: NodeRef<NodeId=Self::NodeId, Weight=Self::NodeWeight>; - type NodeReferences: Iterator<Item=Self::NodeRef>; - @section self - fn node_references(self) -> Self::NodeReferences; -} -} - -IntoNodeReferences! {delegate_impl []} - -impl<Id> NodeRef for (Id, ()) -where - Id: Copy, -{ - type NodeId = Id; - type Weight = (); - fn id(&self) -> Self::NodeId { - self.0 - } - fn weight(&self) -> &Self::Weight { - static DUMMY: () = (); - &DUMMY - } -} - -impl<Id, W> NodeRef for (Id, &W) -where - Id: Copy, -{ - type NodeId = Id; - type Weight = W; - fn id(&self) -> Self::NodeId { - self.0 - } - fn weight(&self) -> &Self::Weight { - self.1 - } -} - -trait_template! { -/// Access to the sequence of the graph’s edges -pub trait IntoEdgeReferences : Data + GraphRef { - @section type - type EdgeRef: EdgeRef<NodeId=Self::NodeId, EdgeId=Self::EdgeId, - Weight=Self::EdgeWeight>; - type EdgeReferences: Iterator<Item=Self::EdgeRef>; - @section self - fn edge_references(self) -> Self::EdgeReferences; -} -} - -IntoEdgeReferences! {delegate_impl [] } - -trait_template! { - /// Edge kind property (directed or undirected edges) -pub trait GraphProp : GraphBase { - @section type - /// The kind of edges in the graph. - type EdgeType: EdgeType; - - @section nodelegate - fn is_directed(&self) -> bool { - <Self::EdgeType>::is_directed() - } -} -} - -GraphProp! {delegate_impl []} - -trait_template! { - /// The graph’s `NodeId`s map to indices - #[allow(clippy::needless_arbitrary_self_type)] - pub trait NodeIndexable : GraphBase { - @section self - /// Return an upper bound of the node indices in the graph - /// (suitable for the size of a bitmap). - fn node_bound(self: &Self) -> usize; - /// Convert `a` to an integer index. - fn to_index(self: &Self, a: Self::NodeId) -> usize; - /// Convert `i` to a node index. `i` must be a valid value in the graph. - fn from_index(self: &Self, i: usize) -> Self::NodeId; - } -} - -NodeIndexable! {delegate_impl []} - -trait_template! { - /// The graph’s `NodeId`s map to indices - #[allow(clippy::needless_arbitrary_self_type)] - pub trait EdgeIndexable : GraphBase { - @section self - /// Return an upper bound of the edge indices in the graph - /// (suitable for the size of a bitmap). - fn edge_bound(self: &Self) -> usize; - /// Convert `a` to an integer index. - fn to_index(self: &Self, a: Self::EdgeId) -> usize; - /// Convert `i` to an edge index. `i` must be a valid value in the graph. - fn from_index(self: &Self, i: usize) -> Self::EdgeId; - } -} - -EdgeIndexable! {delegate_impl []} - -trait_template! { -/// A graph with a known node count. -#[allow(clippy::needless_arbitrary_self_type)] -pub trait NodeCount : GraphBase { - @section self - fn node_count(self: &Self) -> usize; -} -} - -NodeCount! {delegate_impl []} - -trait_template! { -/// The graph’s `NodeId`s map to indices, in a range without holes. -/// -/// The graph's node identifiers correspond to exactly the indices -/// `0..self.node_bound()`. -pub trait NodeCompactIndexable : NodeIndexable + NodeCount { } -} - -NodeCompactIndexable! {delegate_impl []} - -/// A mapping for storing the visited status for NodeId `N`. -pub trait VisitMap<N> { - /// Mark `a` as visited. - /// - /// Return **true** if this is the first visit, false otherwise. - fn visit(&mut self, a: N) -> bool; - - /// Return whether `a` has been visited before. - fn is_visited(&self, a: &N) -> bool; -} - -impl<Ix> VisitMap<Ix> for FixedBitSet -where - Ix: IndexType, -{ - fn visit(&mut self, x: Ix) -> bool { - !self.put(x.index()) - } - fn is_visited(&self, x: &Ix) -> bool { - self.contains(x.index()) - } -} - -impl<N, S> VisitMap<N> for HashSet<N, S> -where - N: Hash + Eq, - S: BuildHasher, -{ - fn visit(&mut self, x: N) -> bool { - self.insert(x) - } - fn is_visited(&self, x: &N) -> bool { - self.contains(x) - } -} - -trait_template! { -/// A graph that can create a map that tracks the visited status of its nodes. -#[allow(clippy::needless_arbitrary_self_type)] -pub trait Visitable : GraphBase { - @section type - /// The associated map type - type Map: VisitMap<Self::NodeId>; - @section self - /// Create a new visitor map - fn visit_map(self: &Self) -> Self::Map; - /// Reset the visitor map (and resize to new size of graph if needed) - fn reset_map(self: &Self, map: &mut Self::Map); -} -} -Visitable! {delegate_impl []} - -trait_template! { -/// Create or access the adjacency matrix of a graph. -/// -/// The implementor can either create an adjacency matrix, or it can return -/// a placeholder if it has the needed representation internally. -#[allow(clippy::needless_arbitrary_self_type)] -pub trait GetAdjacencyMatrix : GraphBase { - @section type - /// The associated adjacency matrix type - type AdjMatrix; - @section self - /// Create the adjacency matrix - fn adjacency_matrix(self: &Self) -> Self::AdjMatrix; - /// Return true if there is an edge from `a` to `b`, false otherwise. - /// - /// Computes in O(1) time. - fn is_adjacent(self: &Self, matrix: &Self::AdjMatrix, a: Self::NodeId, b: Self::NodeId) -> bool; -} -} - -GetAdjacencyMatrix! {delegate_impl []} - -trait_template! { -/// A graph with a known edge count. -#[allow(clippy::needless_arbitrary_self_type)] -pub trait EdgeCount : GraphBase { - @section self - /// Return the number of edges in the graph. - fn edge_count(self: &Self) -> usize; -} -} - -EdgeCount! {delegate_impl []} - -mod filter; -mod reversed; -mod undirected_adaptor; diff --git a/vendor/petgraph/src/visit/reversed.rs b/vendor/petgraph/src/visit/reversed.rs deleted file mode 100644 index 4c0b89c8..00000000 --- a/vendor/petgraph/src/visit/reversed.rs +++ /dev/null @@ -1,184 +0,0 @@ -use crate::{Direction, Incoming}; - -use crate::visit::{ - Data, EdgeCount, EdgeIndexable, EdgeRef, GetAdjacencyMatrix, GraphBase, GraphProp, GraphRef, - IntoEdgeReferences, IntoEdges, IntoEdgesDirected, IntoNeighbors, IntoNeighborsDirected, - IntoNodeIdentifiers, IntoNodeReferences, NodeCompactIndexable, NodeCount, NodeIndexable, - Visitable, -}; - -/// An edge-reversing graph adaptor. -/// -/// All edges have the opposite direction with `Reversed`. -#[derive(Copy, Clone, Debug)] -pub struct Reversed<G>(pub G); - -impl<G: GraphBase> GraphBase for Reversed<G> { - type NodeId = G::NodeId; - type EdgeId = G::EdgeId; -} - -impl<G: GraphRef> GraphRef for Reversed<G> {} - -Data! {delegate_impl [[G], G, Reversed<G>, access0]} - -impl<G> IntoNeighbors for Reversed<G> -where - G: IntoNeighborsDirected, -{ - type Neighbors = G::NeighborsDirected; - fn neighbors(self, n: G::NodeId) -> G::NeighborsDirected { - self.0.neighbors_directed(n, Incoming) - } -} - -impl<G> IntoNeighborsDirected for Reversed<G> -where - G: IntoNeighborsDirected, -{ - type NeighborsDirected = G::NeighborsDirected; - fn neighbors_directed(self, n: G::NodeId, d: Direction) -> G::NeighborsDirected { - self.0.neighbors_directed(n, d.opposite()) - } -} - -impl<G> IntoEdges for Reversed<G> -where - G: IntoEdgesDirected, -{ - type Edges = ReversedEdges<G::EdgesDirected>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - ReversedEdges { - iter: self.0.edges_directed(a, Incoming), - } - } -} - -impl<G> IntoEdgesDirected for Reversed<G> -where - G: IntoEdgesDirected, -{ - type EdgesDirected = ReversedEdges<G::EdgesDirected>; - fn edges_directed(self, a: Self::NodeId, dir: Direction) -> Self::Edges { - ReversedEdges { - iter: self.0.edges_directed(a, dir.opposite()), - } - } -} - -impl<G: Visitable> Visitable for Reversed<G> { - type Map = G::Map; - fn visit_map(&self) -> G::Map { - self.0.visit_map() - } - fn reset_map(&self, map: &mut Self::Map) { - self.0.reset_map(map); - } -} - -/// A reversed edges iterator. -#[derive(Debug, Clone)] -pub struct ReversedEdges<I> { - iter: I, -} - -impl<I> Iterator for ReversedEdges<I> -where - I: Iterator, - I::Item: EdgeRef, -{ - type Item = ReversedEdgeReference<I::Item>; - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(ReversedEdgeReference) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -/// A reversed edge reference -#[derive(Copy, Clone, Debug)] -pub struct ReversedEdgeReference<R>(R); - -impl<R> ReversedEdgeReference<R> { - /// Return the original, unreversed edge reference. - pub fn as_unreversed(&self) -> &R { - &self.0 - } - - /// Consume `self` and return the original, unreversed edge reference. - pub fn into_unreversed(self) -> R { - self.0 - } -} - -/// An edge reference -impl<R> EdgeRef for ReversedEdgeReference<R> -where - R: EdgeRef, -{ - type NodeId = R::NodeId; - type EdgeId = R::EdgeId; - type Weight = R::Weight; - fn source(&self) -> Self::NodeId { - self.0.target() - } - fn target(&self) -> Self::NodeId { - self.0.source() - } - fn weight(&self) -> &Self::Weight { - self.0.weight() - } - fn id(&self) -> Self::EdgeId { - self.0.id() - } -} - -impl<G> IntoEdgeReferences for Reversed<G> -where - G: IntoEdgeReferences, -{ - type EdgeRef = ReversedEdgeReference<G::EdgeRef>; - type EdgeReferences = ReversedEdgeReferences<G::EdgeReferences>; - fn edge_references(self) -> Self::EdgeReferences { - ReversedEdgeReferences { - iter: self.0.edge_references(), - } - } -} - -/// A reversed edge references iterator. -#[derive(Debug, Clone)] -pub struct ReversedEdgeReferences<I> { - iter: I, -} - -impl<I> Iterator for ReversedEdgeReferences<I> -where - I: Iterator, - I::Item: EdgeRef, -{ - type Item = ReversedEdgeReference<I::Item>; - fn next(&mut self) -> Option<Self::Item> { - self.iter.next().map(ReversedEdgeReference) - } - fn size_hint(&self) -> (usize, Option<usize>) { - self.iter.size_hint() - } -} - -macro_rules! access0 { - ($e:expr) => { - $e.0 - }; -} - -NodeIndexable! {delegate_impl [[G], G, Reversed<G>, access0]} -NodeCompactIndexable! {delegate_impl [[G], G, Reversed<G>, access0]} -IntoNodeIdentifiers! {delegate_impl [[G], G, Reversed<G>, access0]} -IntoNodeReferences! {delegate_impl [[G], G, Reversed<G>, access0]} -GraphProp! {delegate_impl [[G], G, Reversed<G>, access0]} -NodeCount! {delegate_impl [[G], G, Reversed<G>, access0]} -EdgeCount! {delegate_impl [[G], G, Reversed<G>, access0]} -EdgeIndexable! {delegate_impl [[G], G, Reversed<G>, access0]} -GetAdjacencyMatrix! {delegate_impl [[G], G, Reversed<G>, access0]} diff --git a/vendor/petgraph/src/visit/traversal.rs b/vendor/petgraph/src/visit/traversal.rs deleted file mode 100644 index f1f434a7..00000000 --- a/vendor/petgraph/src/visit/traversal.rs +++ /dev/null @@ -1,536 +0,0 @@ -use super::{GraphRef, IntoNodeIdentifiers, Reversed}; -use super::{IntoNeighbors, IntoNeighborsDirected, VisitMap, Visitable}; -use crate::Incoming; -use std::collections::VecDeque; - -/// Visit nodes of a graph in a depth-first-search (DFS) emitting nodes in -/// preorder (when they are first discovered). -/// -/// The traversal starts at a given node and only traverses nodes reachable -/// from it. -/// -/// `Dfs` is not recursive. -/// -/// `Dfs` does not itself borrow the graph, and because of this you can run -/// a traversal over a graph while still retaining mutable access to it, if you -/// use it like the following example: -/// -/// ``` -/// use petgraph::Graph; -/// use petgraph::visit::Dfs; -/// -/// let mut graph = Graph::<_,()>::new(); -/// let a = graph.add_node(0); -/// -/// let mut dfs = Dfs::new(&graph, a); -/// while let Some(nx) = dfs.next(&graph) { -/// // we can access `graph` mutably here still -/// graph[nx] += 1; -/// } -/// -/// assert_eq!(graph[a], 1); -/// ``` -/// -/// **Note:** The algorithm may not behave correctly if nodes are removed -/// during iteration. It may not necessarily visit added nodes or edges. -#[derive(Clone, Debug)] -pub struct Dfs<N, VM> { - /// The stack of nodes to visit - pub stack: Vec<N>, - /// The map of discovered nodes - pub discovered: VM, -} - -impl<N, VM> Default for Dfs<N, VM> -where - VM: Default, -{ - fn default() -> Self { - Dfs { - stack: Vec::new(), - discovered: VM::default(), - } - } -} - -impl<N, VM> Dfs<N, VM> -where - N: Copy + PartialEq, - VM: VisitMap<N>, -{ - /// Create a new **Dfs**, using the graph's visitor map, and put **start** - /// in the stack of nodes to visit. - pub fn new<G>(graph: G, start: N) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - let mut dfs = Dfs::empty(graph); - dfs.move_to(start); - dfs - } - - /// Create a `Dfs` from a vector and a visit map - pub fn from_parts(stack: Vec<N>, discovered: VM) -> Self { - Dfs { stack, discovered } - } - - /// Clear the visit state - pub fn reset<G>(&mut self, graph: G) - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - graph.reset_map(&mut self.discovered); - self.stack.clear(); - } - - /// Create a new **Dfs** using the graph's visitor map, and no stack. - pub fn empty<G>(graph: G) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - Dfs { - stack: Vec::new(), - discovered: graph.visit_map(), - } - } - - /// Keep the discovered map, but clear the visit stack and restart - /// the dfs from a particular node. - pub fn move_to(&mut self, start: N) { - self.stack.clear(); - self.stack.push(start); - } - - /// Return the next node in the dfs, or **None** if the traversal is done. - pub fn next<G>(&mut self, graph: G) -> Option<N> - where - G: IntoNeighbors<NodeId = N>, - { - while let Some(node) = self.stack.pop() { - if self.discovered.visit(node) { - for succ in graph.neighbors(node) { - if !self.discovered.is_visited(&succ) { - self.stack.push(succ); - } - } - return Some(node); - } - } - None - } -} - -/// Visit nodes in a depth-first-search (DFS) emitting nodes in postorder -/// (each node after all its descendants have been emitted). -/// -/// `DfsPostOrder` is not recursive. -/// -/// The traversal starts at a given node and only traverses nodes reachable -/// from it. -#[derive(Clone, Debug)] -pub struct DfsPostOrder<N, VM> { - /// The stack of nodes to visit - pub stack: Vec<N>, - /// The map of discovered nodes - pub discovered: VM, - /// The map of finished nodes - pub finished: VM, -} - -impl<N, VM> Default for DfsPostOrder<N, VM> -where - VM: Default, -{ - fn default() -> Self { - DfsPostOrder { - stack: Vec::new(), - discovered: VM::default(), - finished: VM::default(), - } - } -} - -impl<N, VM> DfsPostOrder<N, VM> -where - N: Copy + PartialEq, - VM: VisitMap<N>, -{ - /// Create a new `DfsPostOrder` using the graph's visitor map, and put - /// `start` in the stack of nodes to visit. - pub fn new<G>(graph: G, start: N) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - let mut dfs = Self::empty(graph); - dfs.move_to(start); - dfs - } - - /// Create a new `DfsPostOrder` using the graph's visitor map, and no stack. - pub fn empty<G>(graph: G) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - DfsPostOrder { - stack: Vec::new(), - discovered: graph.visit_map(), - finished: graph.visit_map(), - } - } - - /// Clear the visit state - pub fn reset<G>(&mut self, graph: G) - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - graph.reset_map(&mut self.discovered); - graph.reset_map(&mut self.finished); - self.stack.clear(); - } - - /// Keep the discovered and finished map, but clear the visit stack and restart - /// the dfs from a particular node. - pub fn move_to(&mut self, start: N) { - self.stack.clear(); - self.stack.push(start); - } - - /// Return the next node in the traversal, or `None` if the traversal is done. - pub fn next<G>(&mut self, graph: G) -> Option<N> - where - G: IntoNeighbors<NodeId = N>, - { - while let Some(&nx) = self.stack.last() { - if self.discovered.visit(nx) { - // First time visiting `nx`: Push neighbors, don't pop `nx` - for succ in graph.neighbors(nx) { - if !self.discovered.is_visited(&succ) { - self.stack.push(succ); - } - } - } else { - self.stack.pop(); - if self.finished.visit(nx) { - // Second time: All reachable nodes must have been finished - return Some(nx); - } - } - } - None - } -} - -/// A breadth first search (BFS) of a graph. -/// -/// The traversal starts at a given node and only traverses nodes reachable -/// from it. -/// -/// `Bfs` is not recursive. -/// -/// `Bfs` does not itself borrow the graph, and because of this you can run -/// a traversal over a graph while still retaining mutable access to it, if you -/// use it like the following example: -/// -/// ``` -/// use petgraph::Graph; -/// use petgraph::visit::Bfs; -/// -/// let mut graph = Graph::<_,()>::new(); -/// let a = graph.add_node(0); -/// -/// let mut bfs = Bfs::new(&graph, a); -/// while let Some(nx) = bfs.next(&graph) { -/// // we can access `graph` mutably here still -/// graph[nx] += 1; -/// } -/// -/// assert_eq!(graph[a], 1); -/// ``` -/// -/// **Note:** The algorithm may not behave correctly if nodes are removed -/// during iteration. It may not necessarily visit added nodes or edges. -#[derive(Clone)] -pub struct Bfs<N, VM> { - /// The queue of nodes to visit - pub stack: VecDeque<N>, - /// The map of discovered nodes - pub discovered: VM, -} - -impl<N, VM> Default for Bfs<N, VM> -where - VM: Default, -{ - fn default() -> Self { - Bfs { - stack: VecDeque::new(), - discovered: VM::default(), - } - } -} - -impl<N, VM> Bfs<N, VM> -where - N: Copy + PartialEq, - VM: VisitMap<N>, -{ - /// Create a new **Bfs**, using the graph's visitor map, and put **start** - /// in the stack of nodes to visit. - pub fn new<G>(graph: G, start: N) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - let mut discovered = graph.visit_map(); - discovered.visit(start); - let mut stack = VecDeque::new(); - stack.push_front(start); - Bfs { stack, discovered } - } - - /// Return the next node in the bfs, or **None** if the traversal is done. - pub fn next<G>(&mut self, graph: G) -> Option<N> - where - G: IntoNeighbors<NodeId = N>, - { - if let Some(node) = self.stack.pop_front() { - for succ in graph.neighbors(node) { - if self.discovered.visit(succ) { - self.stack.push_back(succ); - } - } - - return Some(node); - } - None - } -} - -/// A topological order traversal for a graph. -/// -/// **Note** that `Topo` only visits nodes that are not part of cycles, -/// i.e. nodes in a true DAG. Use other visitors like `DfsPostOrder` or -/// algorithms like kosaraju_scc to handle graphs with possible cycles. -#[derive(Clone)] -pub struct Topo<N, VM> { - tovisit: Vec<N>, - ordered: VM, -} - -impl<N, VM> Default for Topo<N, VM> -where - VM: Default, -{ - fn default() -> Self { - Topo { - tovisit: Vec::new(), - ordered: VM::default(), - } - } -} - -impl<N, VM> Topo<N, VM> -where - N: Copy + PartialEq, - VM: VisitMap<N>, -{ - /// Create a new `Topo`, using the graph's visitor map, and put all - /// initial nodes in the to visit list. - pub fn new<G>(graph: G) -> Self - where - G: IntoNodeIdentifiers + IntoNeighborsDirected + Visitable<NodeId = N, Map = VM>, - { - let mut topo = Self::empty(graph); - topo.extend_with_initials(graph); - topo - } - - /// Create a new `Topo` with initial nodes. - /// - /// Nodes with incoming edges are ignored. - pub fn with_initials<G, I>(graph: G, initials: I) -> Self - where - G: IntoNeighborsDirected + Visitable<NodeId = N, Map = VM>, - I: IntoIterator<Item = N>, - { - Topo { - tovisit: initials - .into_iter() - .filter(|&n| graph.neighbors_directed(n, Incoming).next().is_none()) - .collect(), - ordered: graph.visit_map(), - } - } - - fn extend_with_initials<G>(&mut self, g: G) - where - G: IntoNodeIdentifiers + IntoNeighborsDirected<NodeId = N>, - { - // find all initial nodes (nodes without incoming edges) - self.tovisit.extend( - g.node_identifiers() - .filter(move |&a| g.neighbors_directed(a, Incoming).next().is_none()), - ); - } - - /* Private until it has a use */ - /// Create a new `Topo`, using the graph's visitor map with *no* starting - /// index specified. - fn empty<G>(graph: G) -> Self - where - G: GraphRef + Visitable<NodeId = N, Map = VM>, - { - Topo { - ordered: graph.visit_map(), - tovisit: Vec::new(), - } - } - - /// Clear visited state, and put all initial nodes in the to visit list. - pub fn reset<G>(&mut self, graph: G) - where - G: IntoNodeIdentifiers + IntoNeighborsDirected + Visitable<NodeId = N, Map = VM>, - { - graph.reset_map(&mut self.ordered); - self.tovisit.clear(); - self.extend_with_initials(graph); - } - - /// Return the next node in the current topological order traversal, or - /// `None` if the traversal is at the end. - /// - /// *Note:* The graph may not have a complete topological order, and the only - /// way to know is to run the whole traversal and make sure it visits every node. - pub fn next<G>(&mut self, g: G) -> Option<N> - where - G: IntoNeighborsDirected + Visitable<NodeId = N, Map = VM>, - { - // Take an unvisited element and find which of its neighbors are next - while let Some(nix) = self.tovisit.pop() { - if self.ordered.is_visited(&nix) { - continue; - } - self.ordered.visit(nix); - for neigh in g.neighbors(nix) { - // Look at each neighbor, and those that only have incoming edges - // from the already ordered list, they are the next to visit. - if Reversed(g) - .neighbors(neigh) - .all(|b| self.ordered.is_visited(&b)) - { - self.tovisit.push(neigh); - } - } - return Some(nix); - } - None - } -} - -/// A walker is a traversal state, but where part of the traversal -/// information is supplied manually to each next call. -/// -/// This for example allows graph traversals that don't hold a borrow of the -/// graph they are traversing. -pub trait Walker<Context> { - type Item; - /// Advance to the next item - fn walk_next(&mut self, context: Context) -> Option<Self::Item>; - - /// Create an iterator out of the walker and given `context`. - fn iter(self, context: Context) -> WalkerIter<Self, Context> - where - Self: Sized, - Context: Clone, - { - WalkerIter { - walker: self, - context, - } - } -} - -/// A walker and its context wrapped into an iterator. -#[derive(Clone, Debug)] -pub struct WalkerIter<W, C> { - walker: W, - context: C, -} - -impl<W, C> WalkerIter<W, C> -where - W: Walker<C>, - C: Clone, -{ - pub fn context(&self) -> C { - self.context.clone() - } - - pub fn inner_ref(&self) -> &W { - &self.walker - } - - pub fn inner_mut(&mut self) -> &mut W { - &mut self.walker - } -} - -impl<W, C> Iterator for WalkerIter<W, C> -where - W: Walker<C>, - C: Clone, -{ - type Item = W::Item; - fn next(&mut self) -> Option<Self::Item> { - self.walker.walk_next(self.context.clone()) - } -} - -impl<C, W: ?Sized> Walker<C> for &mut W -where - W: Walker<C>, -{ - type Item = W::Item; - fn walk_next(&mut self, context: C) -> Option<Self::Item> { - (**self).walk_next(context) - } -} - -impl<G> Walker<G> for Dfs<G::NodeId, G::Map> -where - G: IntoNeighbors + Visitable, -{ - type Item = G::NodeId; - fn walk_next(&mut self, context: G) -> Option<Self::Item> { - self.next(context) - } -} - -impl<G> Walker<G> for DfsPostOrder<G::NodeId, G::Map> -where - G: IntoNeighbors + Visitable, -{ - type Item = G::NodeId; - fn walk_next(&mut self, context: G) -> Option<Self::Item> { - self.next(context) - } -} - -impl<G> Walker<G> for Bfs<G::NodeId, G::Map> -where - G: IntoNeighbors + Visitable, -{ - type Item = G::NodeId; - fn walk_next(&mut self, context: G) -> Option<Self::Item> { - self.next(context) - } -} - -impl<G> Walker<G> for Topo<G::NodeId, G::Map> -where - G: IntoNeighborsDirected + Visitable, -{ - type Item = G::NodeId; - fn walk_next(&mut self, context: G) -> Option<Self::Item> { - self.next(context) - } -} diff --git a/vendor/petgraph/src/visit/undirected_adaptor.rs b/vendor/petgraph/src/visit/undirected_adaptor.rs deleted file mode 100644 index ee7e21e0..00000000 --- a/vendor/petgraph/src/visit/undirected_adaptor.rs +++ /dev/null @@ -1,111 +0,0 @@ -use crate::visit::{ - Data, GraphBase, GraphProp, GraphRef, IntoEdgeReferences, IntoEdges, IntoEdgesDirected, - IntoNeighbors, IntoNeighborsDirected, IntoNodeIdentifiers, IntoNodeReferences, - NodeCompactIndexable, NodeCount, NodeIndexable, Visitable, -}; -use crate::Direction; - -/// An edge direction removing graph adaptor. -#[derive(Copy, Clone, Debug)] -pub struct UndirectedAdaptor<G>(pub G); - -impl<G: GraphRef> GraphRef for UndirectedAdaptor<G> {} - -impl<G> IntoNeighbors for UndirectedAdaptor<G> -where - G: IntoNeighborsDirected, -{ - type Neighbors = std::iter::Chain<G::NeighborsDirected, G::NeighborsDirected>; - fn neighbors(self, n: G::NodeId) -> Self::Neighbors { - self.0 - .neighbors_directed(n, Direction::Incoming) - .chain(self.0.neighbors_directed(n, Direction::Outgoing)) - } -} - -impl<G> IntoEdges for UndirectedAdaptor<G> -where - G: IntoEdgesDirected, -{ - type Edges = std::iter::Chain<G::EdgesDirected, G::EdgesDirected>; - fn edges(self, a: Self::NodeId) -> Self::Edges { - self.0 - .edges_directed(a, Direction::Incoming) - .chain(self.0.edges_directed(a, Direction::Outgoing)) - } -} - -impl<G> GraphProp for UndirectedAdaptor<G> -where - G: GraphBase, -{ - type EdgeType = crate::Undirected; - - fn is_directed(&self) -> bool { - false - } -} - -macro_rules! access0 { - ($e:expr) => { - $e.0 - }; -} - -GraphBase! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -Data! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -IntoEdgeReferences! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -Visitable! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -NodeIndexable! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -NodeCompactIndexable! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -IntoNodeIdentifiers! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -IntoNodeReferences! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} -NodeCount! {delegate_impl [[G], G, UndirectedAdaptor<G>, access0]} - -#[cfg(test)] -mod tests { - use super::*; - use crate::graph::{DiGraph, Graph}; - use crate::visit::Dfs; - - static LINEAR_EDGES: [(u32, u32); 5] = [(0, 1), (1, 2), (2, 3), (3, 4), (4, 5)]; - - #[test] - pub fn test_is_reachable() { - // create a linear digraph, choose a node in the centre and check all nodes are visited - // by a dfs - - let graph = DiGraph::<(), ()>::from_edges(&LINEAR_EDGES); - - let mut nodes = graph.node_identifiers().collect::<Vec<_>>(); - nodes.sort(); - - let graph = UndirectedAdaptor(&graph); - - use crate::visit::Walker; - let mut visited_nodes: Vec<_> = Dfs::new(&graph, nodes[2]).iter(&graph).collect(); - visited_nodes.sort(); - assert_eq!(visited_nodes, nodes); - } - - #[test] - pub fn test_neighbors_count() { - { - let graph = Graph::<(), ()>::from_edges(&LINEAR_EDGES); - let graph = UndirectedAdaptor(&graph); - - let mut nodes = graph.node_identifiers().collect::<Vec<_>>(); - nodes.sort(); - assert_eq!(graph.neighbors(nodes[1]).count(), 2); - } - - { - let graph = Graph::<(), ()>::from_edges(&LINEAR_EDGES); - let graph = UndirectedAdaptor(&graph); - - let mut nodes = graph.node_identifiers().collect::<Vec<_>>(); - nodes.sort(); - assert_eq!(graph.neighbors(nodes[1]).count(), 2); - } - } -} diff --git a/vendor/petgraph/tests/adjacency_matrix.rs b/vendor/petgraph/tests/adjacency_matrix.rs deleted file mode 100644 index 4a919be2..00000000 --- a/vendor/petgraph/tests/adjacency_matrix.rs +++ /dev/null @@ -1,202 +0,0 @@ -use petgraph::{ - adj::List, - csr::Csr, - visit::{EdgeRef, GetAdjacencyMatrix, GraphProp, IntoEdgeReferences, IntoNodeIdentifiers}, - Directed, EdgeType, Graph, Undirected, -}; - -#[cfg(feature = "graphmap")] -use petgraph::graphmap::GraphMap; - -#[cfg(feature = "matrix_graph")] -use petgraph::matrix_graph::MatrixGraph; - -#[cfg(feature = "stable_graph")] -use petgraph::stable_graph::StableGraph; - -fn test_adjacency_matrix<G>(g: G) -where - G: GetAdjacencyMatrix + IntoNodeIdentifiers + IntoEdgeReferences + GraphProp, -{ - let matrix = g.adjacency_matrix(); - let node_ids: Vec<G::NodeId> = g.node_identifiers().collect(); - let edges: Vec<(G::NodeId, G::NodeId)> = g - .edge_references() - .map(|edge| (edge.source(), edge.target())) - .collect(); - - for &a in &node_ids { - for &b in &node_ids { - if edges.contains(&(a, b)) || (!g.is_directed() && edges.contains(&(b, a))) { - assert!(g.is_adjacent(&matrix, a, b)); - } else { - assert!(!g.is_adjacent(&matrix, a, b)); - } - } - } -} - -fn test_adjacency_matrix_for_graph<Ty: EdgeType>() { - for (order, edges) in TEST_CASES { - let mut g: Graph<(), (), Ty, u16> = Graph::with_capacity(order, edges.len()); - - for _ in 0..order { - g.add_node(()); - } - g.extend_with_edges(edges); - - test_adjacency_matrix(&g); - } -} - -#[test] -fn test_adjacency_matrix_for_graph_directed() { - test_adjacency_matrix_for_graph::<Directed>(); -} - -#[test] -fn test_adjacency_matrix_for_graph_undirected() { - test_adjacency_matrix_for_graph::<Undirected>(); -} - -#[cfg(feature = "stable_graph")] -fn test_adjacency_matrix_for_stable_graph<Ty: EdgeType>() { - for (order, edges) in TEST_CASES { - let mut g: StableGraph<(), (), Ty, u16> = StableGraph::with_capacity(order, edges.len()); - - for _ in 0..order { - g.add_node(()); - } - g.extend_with_edges(edges); - - test_adjacency_matrix(&g); - } -} - -#[cfg(feature = "stable_graph")] -#[test] -fn test_adjacency_matrix_for_stable_graph_directed() { - test_adjacency_matrix_for_stable_graph::<Directed>(); -} - -#[cfg(feature = "stable_graph")] -#[test] -fn test_adjacency_matrix_for_stable_graph_undirected() { - test_adjacency_matrix_for_stable_graph::<Undirected>(); -} - -#[cfg(feature = "graphmap")] -fn test_adjacency_matrix_for_graph_map<Ty: EdgeType>() { - for (order, edges) in TEST_CASES { - let mut g: GraphMap<u16, (), Ty> = GraphMap::with_capacity(order, edges.len()); - - for i in 0..order { - g.add_node(i as u16); - } - for &(a, b) in edges { - g.add_edge(a, b, ()); - } - - test_adjacency_matrix(&g); - } -} - -#[cfg(feature = "graphmap")] -#[test] -fn test_adjacency_matrix_for_graph_map_directed() { - test_adjacency_matrix_for_graph_map::<Directed>(); -} - -#[cfg(feature = "graphmap")] -#[test] -fn test_adjacency_matrix_for_graph_map_undirected() { - test_adjacency_matrix_for_graph_map::<Undirected>(); -} - -#[cfg(feature = "matrix_graph")] -fn test_adjacency_matrix_for_matrix_graph<Ty: EdgeType>() { - for (order, edges) in TEST_CASES { - let mut g: MatrixGraph<(), (), Ty> = MatrixGraph::with_capacity(order); - - for _ in 0..order { - g.add_node(()); - } - g.extend_with_edges(edges); - - test_adjacency_matrix(&g); - } -} - -#[cfg(feature = "matrix_graph")] -#[test] -fn test_adjacency_matrix_for_matrix_graph_directed() { - test_adjacency_matrix_for_matrix_graph::<Directed>(); -} - -#[cfg(feature = "matrix_graph")] -#[test] -fn test_adjacency_matrix_for_matrix_graph_undirected() { - test_adjacency_matrix_for_matrix_graph::<Undirected>(); -} - -fn test_adjacency_matrix_for_csr<Ty: EdgeType>() { - for (order, edges) in TEST_CASES { - let mut g: Csr<(), (), Ty, u16> = Csr::new(); - - for _ in 0..order { - g.add_node(()); - } - for &(a, b) in edges { - g.add_edge(a, b, ()); - } - - test_adjacency_matrix(&g); - } -} - -#[test] -fn test_adjacency_matrix_for_csr_directed() { - test_adjacency_matrix_for_csr::<Directed>(); -} - -#[test] -fn test_adjacency_matrix_for_csr_undirected() { - test_adjacency_matrix_for_csr::<Undirected>(); -} - -#[test] -fn test_adjacency_matrix_for_adj_list() { - for (order, edges) in TEST_CASES { - let mut g: List<(), u16> = List::with_capacity(order); - - for _ in 0..order { - g.add_node(); - } - - for &(a, b) in edges { - g.add_edge(a, b, ()); - } - - test_adjacency_matrix(&g); - } -} - -// Test cases format: (graph order, graph edges) -#[rustfmt::skip] -const TEST_CASES: [(usize, &[(u16, u16)]); 10] = [ - // Empty Graphs - (0, &[]), - (1, &[]), - (2, &[]), - // Graph with a loop - (2, &[(0, 0)]), - // Small Graphs - (5, &[(0, 2), (0, 4), (1, 3), (3, 4)]), - (6, &[(2, 3)]), - (9, &[(1, 4), (2, 8), (3, 7), (4, 8), (5, 8)]), - // Complete Graphs - (2, &[(0, 1)]), - (7, &[(0, 1), (0, 2), (0, 3), (0, 4), (0, 5), (0, 6), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6), (2, 3), (2, 4), (2, 5), (2, 6), (3, 4), (3, 5), (3, 6), (4, 5), (4, 6), (5, 6)]), - // Petersen - (10, &[(0, 1), (0, 4), (0, 5), (1, 2), (1, 6), (2, 3), (2, 7), (3, 4), (3, 8), (4, 9), (5, 7), (5, 8), (6, 8), (6, 9), (7, 9)]), -]; diff --git a/vendor/petgraph/tests/coloring.rs b/vendor/petgraph/tests/coloring.rs deleted file mode 100644 index 86890bb9..00000000 --- a/vendor/petgraph/tests/coloring.rs +++ /dev/null @@ -1,59 +0,0 @@ -use petgraph::algo::dsatur_coloring; -use petgraph::{Graph, Undirected}; - -#[test] -fn dsatur_coloring_cycle6() { - let mut graph: Graph<(), (), Undirected> = Graph::new_undirected(); - let a = graph.add_node(()); - let d = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let e = graph.add_node(()); - let f = graph.add_node(()); - graph.extend_with_edges(&[(a, b), (b, c), (c, d), (d, e), (e, f), (f, e)]); - - let (coloring, nb_colors) = dsatur_coloring(&graph); - assert_eq!(nb_colors, 2); - assert_eq!(coloring.len(), 6); -} - -#[test] -fn dsatur_coloring_bipartite() { - let mut graph: Graph<(), (), Undirected> = Graph::new_undirected(); - let a = graph.add_node(()); - let d = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let e = graph.add_node(()); - let f = graph.add_node(()); - let g = graph.add_node(()); - let h = graph.add_node(()); - let i = graph.add_node(()); - let j = graph.add_node(()); - let k = graph.add_node(()); - let l = graph.add_node(()); - graph.extend_with_edges(&[ - (a, b), - (a, g), - (a, l), - (b, d), - (b, h), - (b, k), - (c, d), - (c, k), - (d, l), - (e, f), - (e, j), - (f, i), - (f, l), - (g, h), - (g, j), - (g, k), - (h, i), - (i, j), - (i, k), - ]); - - let (_, nb_colors) = dsatur_coloring(&graph); - assert_eq!(nb_colors, 2); -} diff --git a/vendor/petgraph/tests/floyd_warshall.rs b/vendor/petgraph/tests/floyd_warshall.rs deleted file mode 100644 index 2397d1b4..00000000 --- a/vendor/petgraph/tests/floyd_warshall.rs +++ /dev/null @@ -1,341 +0,0 @@ -use petgraph::algo::floyd_warshall; -use petgraph::{prelude::*, Directed, Graph, Undirected}; -use std::collections::HashMap; - -#[test] -fn floyd_warshall_uniform_weight() { - let mut graph: Graph<(), (), Directed> = Graph::new(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let d = graph.add_node(()); - let e = graph.add_node(()); - let f = graph.add_node(()); - let g = graph.add_node(()); - let h = graph.add_node(()); - - graph.extend_with_edges(&[ - (a, b), - (b, c), - (c, d), - (d, a), - (e, f), - (b, e), - (f, g), - (g, h), - (h, e), - ]); - // a ----> b ----> e ----> f - // ^ | ^ | - // | v | v - // d <---- c h <---- g - - let inf = std::i32::MAX; - let expected_res: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((a, c), 2), - ((a, d), 3), - ((a, e), 2), - ((a, f), 3), - ((a, g), 4), - ((a, h), 5), - ((b, a), 3), - ((b, b), 0), - ((b, c), 1), - ((b, d), 2), - ((b, e), 1), - ((b, f), 2), - ((b, g), 3), - ((b, h), 4), - ((c, a), 2), - ((c, b), 3), - ((c, c), 0), - ((c, d), 1), - ((c, e), 4), - ((c, f), 5), - ((c, g), 6), - ((c, h), 7), - ((d, a), 1), - ((d, b), 2), - ((d, c), 3), - ((d, d), 0), - ((d, e), 3), - ((d, f), 4), - ((d, g), 5), - ((d, h), 6), - ((e, a), inf), - ((e, b), inf), - ((e, c), inf), - ((e, d), inf), - ((e, e), 0), - ((e, f), 1), - ((e, g), 2), - ((e, h), 3), - ((f, a), inf), - ((f, b), inf), - ((f, c), inf), - ((f, d), inf), - ((f, e), 3), - ((f, f), 0), - ((f, g), 1), - ((f, h), 2), - ((g, a), inf), - ((g, b), inf), - ((g, c), inf), - ((g, d), inf), - ((g, e), 2), - ((g, f), 3), - ((g, g), 0), - ((g, h), 1), - ((h, a), inf), - ((h, b), inf), - ((h, c), inf), - ((h, d), inf), - ((h, e), 1), - ((h, f), 2), - ((h, g), 3), - ((h, h), 0), - ] - .iter() - .cloned() - .collect(); - let res = floyd_warshall(&graph, |_| 1_i32).unwrap(); - - let nodes = [a, b, c, d, e, f, g, h]; - for node1 in &nodes { - for node2 in &nodes { - assert_eq!( - res.get(&(*node1, *node2)).unwrap(), - expected_res.get(&(*node1, *node2)).unwrap() - ); - } - } -} - -#[test] -fn floyd_warshall_weighted() { - let mut graph: Graph<(), (), Directed> = Graph::new(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let d = graph.add_node(()); - - graph.extend_with_edges(&[(a, b), (a, c), (a, d), (b, c), (b, d), (c, d)]); - - let inf = std::i32::MAX; - let expected_res: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((a, c), 3), - ((a, d), 3), - ((b, a), inf), - ((b, b), 0), - ((b, c), 2), - ((b, d), 2), - ((c, a), inf), - ((c, b), inf), - ((c, c), 0), - ((c, d), 2), - ((d, a), inf), - ((d, b), inf), - ((d, c), inf), - ((d, d), 0), - ] - .iter() - .cloned() - .collect(); - - let weight_map: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((a, c), 4), - ((a, d), 10), - ((b, b), 0), - ((b, c), 2), - ((b, d), 2), - ((c, c), 0), - ((c, d), 2), - ] - .iter() - .cloned() - .collect(); - - let res = floyd_warshall(&graph, |edge| { - if let Some(weight) = weight_map.get(&(edge.source(), edge.target())) { - *weight - } else { - inf - } - }) - .unwrap(); - - let nodes = [a, b, c, d]; - for node1 in &nodes { - for node2 in &nodes { - assert_eq!( - res.get(&(*node1, *node2)).unwrap(), - expected_res.get(&(*node1, *node2)).unwrap() - ); - } - } -} - -#[test] -fn floyd_warshall_weighted_undirected() { - let mut graph: Graph<(), (), Undirected> = Graph::new_undirected(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let d = graph.add_node(()); - - graph.extend_with_edges(&[(a, b), (a, c), (a, d), (b, d), (c, b), (c, d)]); - - let inf = std::i32::MAX; - let expected_res: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((a, c), 3), - ((a, d), 3), - ((b, a), 1), - ((b, b), 0), - ((b, c), 2), - ((b, d), 2), - ((c, a), 3), - ((c, b), 2), - ((c, c), 0), - ((c, d), 2), - ((d, a), 3), - ((d, b), 2), - ((d, c), 2), - ((d, d), 0), - ] - .iter() - .cloned() - .collect(); - - let weight_map: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((a, c), 4), - ((a, d), 10), - ((b, b), 0), - ((b, d), 2), - ((c, b), 2), - ((c, c), 0), - ((c, d), 2), - ] - .iter() - .cloned() - .collect(); - - let res = floyd_warshall(&graph, |edge| { - if let Some(weight) = weight_map.get(&(edge.source(), edge.target())) { - *weight - } else { - inf - } - }) - .unwrap(); - - let nodes = [a, b, c, d]; - for node1 in &nodes { - for node2 in &nodes { - assert_eq!( - res.get(&(*node1, *node2)).unwrap(), - expected_res.get(&(*node1, *node2)).unwrap() - ); - } - } -} - -#[test] -fn floyd_warshall_negative_cycle() { - let mut graph: Graph<(), (), Directed> = Graph::new(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - - graph.extend_with_edges(&[(a, b), (b, c), (c, a)]); - - let inf = std::i32::MAX; - - let weight_map: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((b, b), 0), - ((b, c), -3), - ((c, c), 0), - ((c, a), 1), - ] - .iter() - .cloned() - .collect(); - - let res = floyd_warshall(&graph, |edge| { - if let Some(weight) = weight_map.get(&(edge.source(), edge.target())) { - *weight - } else { - inf - } - }); - - assert!(res.is_err()); -} - -#[test] -fn floyd_warshall_multiple_edges() { - let mut graph: Graph<(), i32, Directed> = Graph::new(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let d = graph.add_node(()); - - graph.extend_with_edges(&[ - (a, b, 10), - (a, b, 1), - (a, c, 4), - (a, d, 10), - (b, c, 2), - (b, d, 2), - (c, d, 2), - (a, d, 100), - (c, d, 20), - (a, a, 5), - ]); - - let inf = std::i32::MAX; - let expected_res: HashMap<(NodeIndex, NodeIndex), i32> = [ - ((a, a), 0), - ((a, b), 1), - ((a, c), 3), - ((a, d), 3), - ((b, a), inf), - ((b, b), 0), - ((b, c), 2), - ((b, d), 2), - ((c, a), inf), - ((c, b), inf), - ((c, c), 0), - ((c, d), 2), - ((d, a), inf), - ((d, b), inf), - ((d, c), inf), - ((d, d), 0), - ] - .iter() - .cloned() - .collect(); - - let res = floyd_warshall(&graph, |edge| *edge.weight()).unwrap(); - - let nodes = [a, b, c, d]; - for node1 in &nodes { - for node2 in &nodes { - assert_eq!( - res.get(&(*node1, *node2)).unwrap(), - expected_res.get(&(*node1, *node2)).unwrap() - ); - } - } -} diff --git a/vendor/petgraph/tests/ford_fulkerson.rs b/vendor/petgraph/tests/ford_fulkerson.rs deleted file mode 100644 index 0b7881d2..00000000 --- a/vendor/petgraph/tests/ford_fulkerson.rs +++ /dev/null @@ -1,121 +0,0 @@ -use petgraph::algo::ford_fulkerson; -use petgraph::prelude::Graph; - -#[test] -fn test_ford_fulkerson() { - // Example from https://downey.io/blog/max-flow-ford-fulkerson-algorithm-explanation/ - let mut graph = Graph::<usize, u16>::new(); - let source = graph.add_node(0); - let _ = graph.add_node(1); - let _ = graph.add_node(2); - let destination = graph.add_node(3); - graph.extend_with_edges(&[(0, 1, 3), (0, 2, 2), (1, 2, 5), (1, 3, 2), (2, 3, 3)]); - let (max_flow, _) = ford_fulkerson(&graph, source, destination); - assert_eq!(5, max_flow); - - // Example from https://brilliant.org/wiki/ford-fulkerson-algorithm/ - let mut graph = Graph::<usize, f32>::new(); - let source = graph.add_node(0); - let _ = graph.add_node(1); - let _ = graph.add_node(2); - let _ = graph.add_node(3); - let _ = graph.add_node(4); - let destination = graph.add_node(5); - graph.extend_with_edges(&[ - (0, 1, 4.), - (0, 2, 3.), - (1, 3, 4.), - (2, 4, 6.), - (3, 2, 3.), - (3, 5, 2.), - (4, 5, 6.), - ]); - let (max_flow, _) = ford_fulkerson(&graph, source, destination); - assert_eq!(7.0, max_flow); - - // Example from https://cp-algorithms.com/graph/edmonds_karp.html - let mut graph = Graph::<usize, f32>::new(); - let source = graph.add_node(0); - let _ = graph.add_node(1); - let _ = graph.add_node(2); - let _ = graph.add_node(3); - let _ = graph.add_node(4); - let destination = graph.add_node(5); - graph.extend_with_edges(&[ - (0, 1, 7.), - (0, 2, 4.), - (1, 3, 5.), - (1, 4, 3.), - (2, 1, 3.), - (2, 4, 2.), - (3, 5, 8.), - (4, 3, 3.), - (4, 5, 5.), - ]); - let (max_flow, _) = ford_fulkerson(&graph, source, destination); - assert_eq!(10.0, max_flow); - - // Example from https://www.programiz.com/dsa/ford-fulkerson-algorithm (corrected: result not 6 but 5) - let mut graph = Graph::<u8, f32>::new(); - let source = graph.add_node(0); - let _ = graph.add_node(1); - let _ = graph.add_node(2); - let _ = graph.add_node(3); - let _ = graph.add_node(4); - let destination = graph.add_node(5); - graph.extend_with_edges(&[ - (0, 1, 8.), - (0, 2, 3.), - (1, 3, 9.), - (2, 3, 7.), - (2, 4, 4.), - (3, 5, 2.), - (4, 5, 5.), - ]); - let (max_flow, _) = ford_fulkerson(&graph, source, destination); - assert_eq!(5.0, max_flow); - - let mut graph = Graph::<u8, u8>::new(); - let source = graph.add_node(0); - let _ = graph.add_node(1); - let _ = graph.add_node(2); - let _ = graph.add_node(3); - let _ = graph.add_node(4); - let destination = graph.add_node(5); - graph.extend_with_edges(&[ - (0, 1, 16), - (0, 2, 13), - (1, 2, 10), - (1, 3, 12), - (2, 1, 4), - (2, 4, 14), - (3, 2, 9), - (3, 5, 20), - (4, 3, 7), - (4, 5, 4), - ]); - let (max_flow, _) = ford_fulkerson(&graph, source, destination); - assert_eq!(23, max_flow); - - // Example taken from https://medium.com/@jithmisha/solving-the-maximum-flow-problem-with-ford-fulkerson-method-3fccc2883dc7 - let mut graph = Graph::<u8, u8>::new(); - let source = graph.add_node(0); - let _ = graph.add_node(1); - let _ = graph.add_node(2); - let _ = graph.add_node(3); - let _ = graph.add_node(4); - let destination = graph.add_node(5); - graph.extend_with_edges(&[ - (0, 1, 10), - (0, 2, 10), - (1, 2, 2), - (1, 3, 4), - (1, 4, 8), - (2, 4, 9), - (3, 5, 10), - (4, 3, 6), - (4, 5, 10), - ]); - let (max_flow, _) = ford_fulkerson(&graph, source, destination); - assert_eq!(19, max_flow); -} diff --git a/vendor/petgraph/tests/graph.rs b/vendor/petgraph/tests/graph.rs deleted file mode 100644 index 6c8206cc..00000000 --- a/vendor/petgraph/tests/graph.rs +++ /dev/null @@ -1,2454 +0,0 @@ -extern crate petgraph; - -use std::collections::HashSet; -use std::hash::Hash; - -use petgraph::prelude::*; -use petgraph::EdgeType; - -use petgraph as pg; - -use petgraph::algo::{ - dominators, has_path_connecting, is_bipartite_undirected, is_cyclic_undirected, - is_isomorphic_matching, -}; - -use petgraph::graph::node_index as n; -use petgraph::graph::IndexType; - -use petgraph::algo::{astar, dijkstra, DfsSpace}; -use petgraph::visit::{ - IntoEdges, IntoEdgesDirected, IntoNeighbors, IntoNodeIdentifiers, NodeFiltered, Reversed, Topo, - VisitMap, Walker, -}; - -use petgraph::dot::Dot; - -fn set<I>(iter: I) -> HashSet<I::Item> -where - I: IntoIterator, - I::Item: Hash + Eq, -{ - iter.into_iter().collect() -} - -#[test] -fn undirected() { - let mut og = Graph::new_undirected(); - let a = og.add_node(0); - let b = og.add_node(1); - let c = og.add_node(2); - let d = og.add_node(3); - let _ = og.add_edge(a, b, 0); - let _ = og.add_edge(a, c, 1); - og.add_edge(c, a, 2); - og.add_edge(a, a, 3); - og.add_edge(b, c, 4); - og.add_edge(b, a, 5); - og.add_edge(a, d, 6); - assert_eq!(og.node_count(), 4); - assert_eq!(og.edge_count(), 7); - - assert!(og.find_edge(a, b).is_some()); - assert!(og.find_edge(d, a).is_some()); - assert!(og.find_edge(a, a).is_some()); - - for edge in og.raw_edges() { - assert!(og.find_edge(edge.source(), edge.target()).is_some()); - assert!(og.find_edge(edge.target(), edge.source()).is_some()); - } - - assert_eq!(og.neighbors(b).collect::<Vec<_>>(), vec![a, c, a]); - - og.remove_node(a); - assert_eq!(og.neighbors(b).collect::<Vec<_>>(), vec![c]); - assert_eq!(og.node_count(), 3); - assert_eq!(og.edge_count(), 1); - assert!(og.find_edge(a, b).is_none()); - assert!(og.find_edge(d, a).is_none()); - assert!(og.find_edge(a, a).is_none()); - assert!(og.find_edge(b, c).is_some()); - assert_graph_consistent(&og); -} - -#[test] -fn dfs() { - let mut gr = Graph::new(); - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - let k = gr.add_node("K"); - // Z is disconnected. - let _ = gr.add_node("Z"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - gr.add_edge(i, k, 2.); - - println!("{}", Dot::new(&gr)); - - assert_eq!(Dfs::new(&gr, h).iter(&gr).count(), 4); - assert_eq!(Dfs::new(&gr, h).iter(&gr).clone().count(), 4); - - assert_eq!(Dfs::new(&gr, h).iter(Reversed(&gr)).count(), 1); - - assert_eq!(Dfs::new(&gr, k).iter(Reversed(&gr)).count(), 3); - - assert_eq!(Dfs::new(&gr, i).iter(&gr).count(), 3); -} - -#[test] -fn dfs_order() { - let mut gr = Graph::new(); - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - let k = gr.add_node("K"); - gr.add_edge(h, i, ()); - gr.add_edge(h, j, ()); - gr.add_edge(h, k, ()); - gr.add_edge(i, k, ()); - gr.add_edge(k, i, ()); - - // H - // / | \ - // I J K - // \___/ - // - // J cannot be visited between I and K in a depth-first search from H - - let mut seen_i = false; - let mut seen_k = false; - for node in Dfs::new(&gr, h).iter(&gr) { - seen_i |= i == node; - seen_k |= k == node; - assert!(!(j == node && (seen_i ^ seen_k)), "Invalid DFS order"); - } -} - -#[test] -fn bfs() { - let mut gr = Graph::new(); - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - let k = gr.add_node("K"); - // Z is disconnected. - let _ = gr.add_node("Z"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - gr.add_edge(i, k, 2.); - - assert_eq!(Bfs::new(&gr, h).iter(&gr).count(), 4); - assert_eq!(Bfs::new(&gr, h).iter(&gr).clone().count(), 4); - - assert_eq!(Bfs::new(&gr, h).iter(Reversed(&gr)).count(), 1); - - assert_eq!(Bfs::new(&gr, k).iter(Reversed(&gr)).count(), 3); - - assert_eq!(Bfs::new(&gr, i).iter(&gr).count(), 3); - - let mut bfs = Bfs::new(&gr, h); - let nx = bfs.next(&gr); - assert_eq!(nx, Some(h)); - - let nx1 = bfs.next(&gr); - assert!(nx1 == Some(i) || nx1 == Some(j)); - - let nx2 = bfs.next(&gr); - assert!(nx2 == Some(i) || nx2 == Some(j)); - assert!(nx1 != nx2); - - let nx = bfs.next(&gr); - assert_eq!(nx, Some(k)); - assert_eq!(bfs.next(&gr), None); -} - -#[test] -fn selfloop() { - let mut gr = Graph::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - gr.add_edge(a, b, 7.); - gr.add_edge(c, a, 6.); - let sed = gr.add_edge(a, a, 2.); - - assert!(gr.find_edge(a, b).is_some()); - assert!(gr.find_edge(b, a).is_none()); - assert!(gr.find_edge_undirected(b, a).is_some()); - assert!(gr.find_edge(a, a).is_some()); - println!("{:?}", gr); - - gr.remove_edge(sed); - assert!(gr.find_edge(a, a).is_none()); - println!("{:?}", gr); -} - -#[test] -fn cyclic() { - let mut gr = Graph::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - - assert!(!is_cyclic_undirected(&gr)); - gr.add_edge(a, b, 7.); - gr.add_edge(c, a, 6.); - assert!(!is_cyclic_undirected(&gr)); - { - let e = gr.add_edge(a, a, 0.); - assert!(is_cyclic_undirected(&gr)); - gr.remove_edge(e); - assert!(!is_cyclic_undirected(&gr)); - } - - { - let e = gr.add_edge(b, c, 0.); - assert!(is_cyclic_undirected(&gr)); - gr.remove_edge(e); - assert!(!is_cyclic_undirected(&gr)); - } - - let d = gr.add_node("D"); - let e = gr.add_node("E"); - gr.add_edge(b, d, 0.); - gr.add_edge(d, e, 0.); - assert!(!is_cyclic_undirected(&gr)); - gr.add_edge(c, e, 0.); - assert!(is_cyclic_undirected(&gr)); - assert_graph_consistent(&gr); -} - -#[test] -fn bipartite() { - { - let mut gr = Graph::new_undirected(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - - gr.add_edge(a, d, 7.); - gr.add_edge(b, d, 6.); - - assert!(is_bipartite_undirected(&gr, a)); - - let e_index = gr.add_edge(a, b, 6.); - - assert!(!is_bipartite_undirected(&gr, a)); - - gr.remove_edge(e_index); - - assert!(is_bipartite_undirected(&gr, a)); - - gr.add_edge(b, e, 7.); - gr.add_edge(b, f, 6.); - gr.add_edge(c, e, 6.); - - assert!(is_bipartite_undirected(&gr, a)); - } - { - let mut gr = Graph::new_undirected(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - - let f = gr.add_node("F"); - let g = gr.add_node("G"); - let h = gr.add_node("H"); - - gr.add_edge(a, f, 7.); - gr.add_edge(a, g, 7.); - gr.add_edge(a, h, 7.); - - gr.add_edge(b, f, 6.); - gr.add_edge(b, g, 6.); - gr.add_edge(b, h, 6.); - - gr.add_edge(c, f, 6.); - gr.add_edge(c, g, 6.); - gr.add_edge(c, h, 6.); - - gr.add_edge(d, f, 6.); - gr.add_edge(d, g, 6.); - gr.add_edge(d, h, 6.); - - gr.add_edge(e, f, 6.); - gr.add_edge(e, g, 6.); - gr.add_edge(e, h, 6.); - - assert!(is_bipartite_undirected(&gr, a)); - - gr.add_edge(a, b, 6.); - - assert!(!is_bipartite_undirected(&gr, a)); - } -} - -#[test] -fn multi() { - let mut gr = Graph::new(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - gr.add_edge(a, b, ()); - gr.add_edge(a, b, ()); - assert_eq!(gr.edge_count(), 2); -} - -#[test] -fn iter_multi_edges() { - let mut gr = Graph::new(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - - let mut connecting_edges = HashSet::new(); - - gr.add_edge(a, a, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - gr.add_edge(a, c, ()); - gr.add_edge(c, b, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - gr.add_edge(b, a, ()); - - let mut iter = gr.edges_connecting(a, b); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - assert_eq!(None, iter.next()); - assert!(connecting_edges.is_empty()); -} - -#[test] -fn iter_multi_undirected_edges() { - let mut gr = Graph::new_undirected(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - - let mut connecting_edges = HashSet::new(); - - gr.add_edge(a, a, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - gr.add_edge(a, c, ()); - gr.add_edge(c, b, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - connecting_edges.insert(gr.add_edge(b, a, ())); - - let mut iter = gr.edges_connecting(a, b); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - assert_eq!(None, iter.next()); - assert!(connecting_edges.is_empty()); -} - -#[test] -fn update_edge() { - { - let mut gr = Graph::new(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let e = gr.update_edge(a, b, 1); - let f = gr.update_edge(a, b, 2); - let _ = gr.update_edge(b, a, 3); - assert_eq!(gr.edge_count(), 2); - assert_eq!(e, f); - assert_eq!(*gr.edge_weight(f).unwrap(), 2); - } - - { - let mut gr = Graph::new_undirected(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let e = gr.update_edge(a, b, 1); - let f = gr.update_edge(b, a, 2); - assert_eq!(gr.edge_count(), 1); - assert_eq!(e, f); - assert_eq!(*gr.edge_weight(f).unwrap(), 2); - } -} - -#[test] -fn dijk() { - let mut g = Graph::new_undirected(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - let f = g.add_node("F"); - g.add_edge(a, b, 7); - g.add_edge(c, a, 9); - g.add_edge(a, d, 14); - g.add_edge(b, c, 10); - g.add_edge(d, c, 2); - g.add_edge(d, e, 9); - g.add_edge(b, f, 15); - g.add_edge(c, f, 11); - g.add_edge(e, f, 6); - println!("{:?}", g); - for no in Bfs::new(&g, a).iter(&g) { - println!("Visit {:?} = {:?}", no, g.node_weight(no)); - } - - let scores = dijkstra(&g, a, None, |e| *e.weight()); - let mut scores: Vec<_> = scores.into_iter().map(|(n, s)| (g[n], s)).collect(); - scores.sort(); - assert_eq!( - scores, - vec![ - ("A", 0), - ("B", 7), - ("C", 9), - ("D", 11), - ("E", 20), - ("F", 20) - ] - ); - - let scores = dijkstra(&g, a, Some(c), |e| *e.weight()); - assert_eq!(scores[&c], 9); -} - -#[test] -fn test_astar_null_heuristic() { - let mut g = Graph::new(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - let f = g.add_node("F"); - g.add_edge(a, b, 7); - g.add_edge(c, a, 9); - g.add_edge(a, d, 14); - g.add_edge(b, c, 10); - g.add_edge(d, c, 2); - g.add_edge(d, e, 9); - g.add_edge(b, f, 15); - g.add_edge(c, f, 11); - g.add_edge(e, f, 6); - - let path = astar(&g, a, |finish| finish == e, |e| *e.weight(), |_| 0); - assert_eq!(path, Some((23, vec![a, d, e]))); - - // check against dijkstra - let dijkstra_run = dijkstra(&g, a, Some(e), |e| *e.weight()); - assert_eq!(dijkstra_run[&e], 23); - - let path = astar(&g, e, |finish| finish == b, |e| *e.weight(), |_| 0); - assert_eq!(path, None); -} - -#[test] -fn test_astar_manhattan_heuristic() { - let mut g = Graph::new(); - let a = g.add_node((0., 0.)); - let b = g.add_node((2., 0.)); - let c = g.add_node((1., 1.)); - let d = g.add_node((0., 2.)); - let e = g.add_node((3., 3.)); - let f = g.add_node((4., 2.)); - let _ = g.add_node((5., 5.)); // no path to node - g.add_edge(a, b, 2.); - g.add_edge(a, d, 4.); - g.add_edge(b, c, 1.); - g.add_edge(b, f, 7.); - g.add_edge(c, e, 5.); - g.add_edge(e, f, 1.); - g.add_edge(d, e, 1.); - - let heuristic_for = |f: NodeIndex| { - let g = &g; - move |node: NodeIndex| -> f32 { - let (x1, y1): (f32, f32) = g[node]; - let (x2, y2): (f32, f32) = g[f]; - - (x2 - x1).abs() + (y2 - y1).abs() - } - }; - let path = astar( - &g, - a, - |finish| finish == f, - |e| *e.weight(), - heuristic_for(f), - ); - - assert_eq!(path, Some((6., vec![a, d, e, f]))); - - // check against dijkstra - let dijkstra_run = dijkstra(&g, a, None, |e| *e.weight()); - - for end in g.node_indices() { - let astar_path = astar( - &g, - a, - |finish| finish == end, - |e| *e.weight(), - heuristic_for(end), - ); - assert_eq!(dijkstra_run.get(&end).cloned(), astar_path.map(|t| t.0)); - } -} - -#[test] -fn test_astar_runtime_optimal() { - let mut g = Graph::new(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - g.add_edge(a, b, 2); - g.add_edge(a, c, 3); - g.add_edge(b, d, 3); - g.add_edge(c, d, 1); - g.add_edge(d, e, 1); - - let mut times_called = 0; - - let _ = astar( - &g, - a, - |n| n == e, - |edge| { - times_called += 1; - *edge.weight() - }, - |_| 0, - ); - - // A* is runtime optimal in the sense it won't expand more nodes than needed, for the given - // heuristic. Here, A* should expand, in order: A, B, C, D, E. This should should ask for the - // costs of edges (A, B), (A, C), (B, D), (C, D), (D, E). Node D will be added to `visit_next` - // twice, but should only be expanded once. If it is erroneously expanded twice, it will call - // for (D, E) again and `times_called` will be 6. - assert_eq!(times_called, 5); -} - -#[test] -fn test_astar_admissible_inconsistent() { - let mut g = Graph::new(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - g.add_edge(a, b, 3); - g.add_edge(b, c, 3); - g.add_edge(c, d, 3); - g.add_edge(a, c, 8); - g.add_edge(a, d, 10); - - let admissible_inconsistent = |n: NodeIndex| match g[n] { - "A" => 9, - "B" => 6, - "C" => 0, - &_ => 0, - }; - - let optimal = astar(&g, a, |n| n == d, |e| *e.weight(), admissible_inconsistent); - assert_eq!(optimal, Some((9, vec![a, b, c, d]))); -} - -#[cfg(feature = "generate")] -#[test] -fn test_generate_undirected() { - for size in 0..4 { - let mut gen = pg::generate::Generator::<Undirected>::all(size, true); - let nedges = (size * size - size) / 2 + size; - let mut n = 0; - while let Some(g) = gen.next_ref() { - n += 1; - println!("{:?}", g); - } - - assert_eq!(n, 1 << nedges); - } -} - -#[cfg(feature = "generate")] -#[test] -fn test_generate_directed() { - // Number of DAG out of all graphs (all permutations) per node size - // 0, 1, 2, 3, 4, 5 .. - let n_dag = &[1, 1, 3, 25, 543, 29281, 3781503]; - for (size, &dags_exp) in (0..4).zip(n_dag) { - let mut gen = pg::generate::Generator::<Directed>::all(size, true); - let nedges = size * size; - let mut n = 0; - let mut dags = 0; - while let Some(g) = gen.next_ref() { - n += 1; - if !pg::algo::is_cyclic_directed(g) { - dags += 1; - } - } - - /* - // check that all generated graphs have unique adjacency matrices - let mut adjmats = graphs.iter().map(Graph::adjacency_matrix).collect::<Vec<_>>(); - adjmats.sort(); adjmats.dedup(); - assert_eq!(adjmats.len(), n); - */ - assert_eq!(dags_exp, dags); - assert_eq!(n, 1 << nedges); - } -} - -#[cfg(feature = "generate")] -#[test] -fn test_generate_dag() { - use petgraph::visit::GetAdjacencyMatrix; - for size in 1..5 { - let gen = pg::generate::Generator::directed_acyclic(size); - let nedges = (size - 1) * size / 2; - let graphs = gen.collect::<Vec<_>>(); - - assert_eq!(graphs.len(), 1 << nedges); - - // check that all generated graphs have unique adjacency matrices - let mut adjmats = graphs - .iter() - .map(Graph::adjacency_matrix) - .collect::<Vec<_>>(); - adjmats.sort(); - adjmats.dedup(); - assert_eq!(adjmats.len(), graphs.len()); - for gr in &graphs { - assert!( - !petgraph::algo::is_cyclic_directed(gr), - "Assertion failed: {:?} acyclic", - gr - ); - } - } -} - -#[test] -fn without() { - let mut og = Graph::new_undirected(); - let a = og.add_node(0); - let b = og.add_node(1); - let c = og.add_node(2); - let d = og.add_node(3); - let _ = og.add_edge(a, b, 0); - let _ = og.add_edge(a, c, 1); - let v: Vec<NodeIndex> = og.externals(Outgoing).collect(); - assert_eq!(v, vec![d]); - - let mut og = Graph::new(); - let a = og.add_node(0); - let b = og.add_node(1); - let c = og.add_node(2); - let d = og.add_node(3); - let _ = og.add_edge(a, b, 0); - let _ = og.add_edge(a, c, 1); - let init: Vec<NodeIndex> = og.externals(Incoming).collect(); - let term: Vec<NodeIndex> = og.externals(Outgoing).collect(); - assert_eq!(init, vec![a, d]); - assert_eq!(term, vec![b, c, d]); -} - -fn assert_is_topo_order<N, E>(gr: &Graph<N, E, Directed>, order: &[NodeIndex]) { - assert_eq!(gr.node_count(), order.len()); - // check all the edges of the graph - for edge in gr.raw_edges() { - let a = edge.source(); - let b = edge.target(); - let ai = order.iter().position(|x| *x == a).unwrap(); - let bi = order.iter().position(|x| *x == b).unwrap(); - println!("Check that {:?} is before {:?}", a, b); - assert!( - ai < bi, - "Topo order: assertion that node {:?} is before {:?} failed", - a, - b - ); - } -} - -#[test] -fn test_toposort() { - let mut gr = Graph::<_, _>::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - let g = gr.add_node("G"); - gr.extend_with_edges(&[ - (a, b, 7.), - (a, d, 5.), - (d, b, 9.), - (b, c, 8.), - (b, e, 7.), - (c, e, 5.), - (d, e, 15.), - (d, f, 6.), - (f, e, 8.), - (f, g, 11.), - (e, g, 9.), - ]); - - // add a disjoint part - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - - let order = petgraph::algo::toposort(&gr, None).unwrap(); - println!("{:?}", order); - assert_eq!(order.len(), gr.node_count()); - - assert_is_topo_order(&gr, &order); -} - -#[test] -fn test_toposort_eq() { - let mut g = Graph::<_, _>::new(); - let a = g.add_node("A"); - let b = g.add_node("B"); - g.add_edge(a, b, ()); - - assert_eq!(petgraph::algo::toposort(&g, None), Ok(vec![a, b])); -} - -#[test] -fn is_cyclic_directed() { - let mut gr = Graph::<_, _>::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - let g = gr.add_node("G"); - gr.add_edge(a, b, 7.0); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - - assert!(!petgraph::algo::is_cyclic_directed(&gr)); - - // add a disjoint part - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - assert!(!petgraph::algo::is_cyclic_directed(&gr)); - - gr.add_edge(g, e, 0.); - assert!(petgraph::algo::is_cyclic_directed(&gr)); -} - -/// Compare two scc sets. Inside each scc, the order does not matter, -/// but the order of the sccs is significant. -fn assert_sccs_eq( - mut res: Vec<Vec<NodeIndex>>, - mut answer: Vec<Vec<NodeIndex>>, - scc_order_matters: bool, -) { - // normalize the result and compare with the answer. - for scc in &mut res { - scc.sort(); - } - for scc in &mut answer { - scc.sort(); - } - if !scc_order_matters { - res.sort(); - answer.sort(); - } - assert_eq!(res, answer); -} - -#[test] -fn scc() { - let gr: Graph<(), ()> = Graph::from_edges(&[ - (6, 0), - (0, 3), - (3, 6), - (8, 6), - (8, 2), - (2, 5), - (5, 8), - (7, 5), - (1, 7), - (7, 4), - (4, 1), - ]); - - assert_sccs_eq( - petgraph::algo::kosaraju_scc(&gr), - vec![ - vec![n(0), n(3), n(6)], - vec![n(2), n(5), n(8)], - vec![n(1), n(4), n(7)], - ], - true, - ); - // Reversed edges gives the same sccs (when sorted) - assert_sccs_eq( - petgraph::algo::kosaraju_scc(Reversed(&gr)), - vec![ - vec![n(1), n(4), n(7)], - vec![n(2), n(5), n(8)], - vec![n(0), n(3), n(6)], - ], - true, - ); - - // Test an undirected graph just for fun. - // Sccs are just connected components. - let mut hr = gr.into_edge_type::<Undirected>(); - // Delete an edge to disconnect it - let ed = hr.find_edge(n(6), n(8)).unwrap(); - assert!(hr.remove_edge(ed).is_some()); - - assert_sccs_eq( - petgraph::algo::kosaraju_scc(&hr), - vec![ - vec![n(0), n(3), n(6)], - vec![n(1), n(2), n(4), n(5), n(7), n(8)], - ], - false, - ); - - // acyclic non-tree, #14 - let n = NodeIndex::new; - let mut gr = Graph::new(); - gr.add_node(0); - gr.add_node(1); - gr.add_node(2); - gr.add_node(3); - gr.add_edge(n(3), n(2), ()); - gr.add_edge(n(3), n(1), ()); - gr.add_edge(n(2), n(0), ()); - gr.add_edge(n(1), n(0), ()); - - assert_sccs_eq( - petgraph::algo::kosaraju_scc(&gr), - vec![vec![n(0)], vec![n(1)], vec![n(2)], vec![n(3)]], - true, - ); - - // Kosaraju bug from PR #60 - let mut gr = Graph::<(), ()>::new(); - gr.extend_with_edges(&[(0, 0), (1, 0), (2, 0), (2, 1), (2, 2)]); - gr.add_node(()); - // no order for the disconnected one - assert_sccs_eq( - petgraph::algo::kosaraju_scc(&gr), - vec![vec![n(0)], vec![n(1)], vec![n(2)], vec![n(3)]], - false, - ); -} - -#[test] -fn tarjan_scc() { - let gr: Graph<(), ()> = Graph::from_edges(&[ - (6, 0), - (0, 3), - (3, 6), - (8, 6), - (8, 2), - (2, 5), - (5, 8), - (7, 5), - (1, 7), - (7, 4), - (4, 1), - ]); - - let mut tarjan_scc = petgraph::algo::TarjanScc::new(); - - let mut result = Vec::new(); - tarjan_scc.run(&gr, |scc| result.push(scc.iter().rev().cloned().collect())); - assert_sccs_eq( - result, - vec![ - vec![n(0), n(3), n(6)], - vec![n(2), n(5), n(8)], - vec![n(1), n(4), n(7)], - ], - true, - ); - - // Test an undirected graph just for fun. - // Sccs are just connected components. - let mut hr = gr.into_edge_type::<Undirected>(); - // Delete an edge to disconnect it - let ed = hr.find_edge(n(6), n(8)).unwrap(); - assert!(hr.remove_edge(ed).is_some()); - - let mut result = Vec::new(); - tarjan_scc.run(&hr, |scc| result.push(scc.iter().rev().cloned().collect())); - assert_sccs_eq( - result, - vec![ - vec![n(1), n(2), n(4), n(5), n(7), n(8)], - vec![n(0), n(3), n(6)], - ], - false, - ); - - // acyclic non-tree, #14 - let n = NodeIndex::new; - let mut gr = Graph::new(); - gr.add_node(0); - gr.add_node(1); - gr.add_node(2); - gr.add_node(3); - gr.add_edge(n(3), n(2), ()); - gr.add_edge(n(3), n(1), ()); - gr.add_edge(n(2), n(0), ()); - gr.add_edge(n(1), n(0), ()); - - let mut result = Vec::new(); - tarjan_scc.run(&gr, |scc| result.push(scc.iter().rev().cloned().collect())); - assert_sccs_eq( - result, - vec![vec![n(0)], vec![n(1)], vec![n(2)], vec![n(3)]], - true, - ); - - // Kosaraju bug from PR #60 - let mut gr = Graph::<(), ()>::new(); - gr.extend_with_edges(&[(0, 0), (1, 0), (2, 0), (2, 1), (2, 2)]); - gr.add_node(()); - // no order for the disconnected one - let mut result = Vec::new(); - tarjan_scc.run(&gr, |scc| result.push(scc.iter().rev().cloned().collect())); - assert_sccs_eq( - result, - vec![vec![n(0)], vec![n(1)], vec![n(2)], vec![n(3)]], - false, - ); -} - -#[test] -fn condensation() { - let gr: Graph<(), ()> = Graph::from_edges(&[ - (6, 0), - (0, 3), - (3, 6), - (8, 6), - (8, 2), - (2, 3), - (2, 5), - (5, 8), - (7, 5), - (1, 7), - (7, 4), - (4, 1), - ]); - - // make_acyclic = true - - let cond = petgraph::algo::condensation(gr.clone(), true); - - assert!(cond.node_count() == 3); - assert!(cond.edge_count() == 2); - assert!( - !petgraph::algo::is_cyclic_directed(&cond), - "Assertion failed: {:?} acyclic", - cond - ); - - // make_acyclic = false - - let cond = petgraph::algo::condensation(gr.clone(), false); - - assert!(cond.node_count() == 3); - assert!(cond.edge_count() == gr.edge_count()); -} - -#[test] -fn connected_comp() { - let n = NodeIndex::new; - let mut gr = Graph::new(); - gr.add_node(0); - gr.add_node(1); - gr.add_node(2); - gr.add_node(3); - gr.add_node(4); - gr.add_node(5); - gr.add_node(6); - gr.add_node(7); - gr.add_node(8); - gr.add_edge(n(6), n(0), ()); - gr.add_edge(n(0), n(3), ()); - gr.add_edge(n(3), n(6), ()); - gr.add_edge(n(8), n(6), ()); - gr.add_edge(n(8), n(2), ()); - gr.add_edge(n(2), n(5), ()); - gr.add_edge(n(5), n(8), ()); - gr.add_edge(n(7), n(5), ()); - gr.add_edge(n(1), n(7), ()); - gr.add_edge(n(7), n(4), ()); - gr.add_edge(n(4), n(1), ()); - assert_eq!(petgraph::algo::connected_components(&gr), 1); - - gr.add_node(9); - gr.add_node(10); - assert_eq!(petgraph::algo::connected_components(&gr), 3); - - gr.add_edge(n(9), n(10), ()); - assert_eq!(petgraph::algo::connected_components(&gr), 2); - - let gr = gr.into_edge_type::<Undirected>(); - assert_eq!(petgraph::algo::connected_components(&gr), 2); -} - -#[should_panic] -#[test] -fn oob_index() { - let mut gr = Graph::<_, ()>::new(); - let a = gr.add_node(0); - let b = gr.add_node(1); - gr.remove_node(a); - #[allow(clippy::no_effect)] - gr[b]; -} - -#[test] -fn usize_index() { - let mut gr = Graph::<_, _, Directed, usize>::with_capacity(0, 0); - let a = gr.add_node(0); - let b = gr.add_node(1); - let e = gr.add_edge(a, b, 1.2); - let mut dfs = Dfs::new(&gr, a); - while let Some(nx) = dfs.next(&gr) { - gr[nx] += 1; - } - assert_eq!(gr[a], 1); - assert_eq!(gr[b], 2); - assert_eq!(gr[e], 1.2); -} - -#[test] -fn u8_index() { - let mut gr = Graph::<_, (), Undirected, u8>::with_capacity(0, 0); - for _ in 0..255 { - gr.add_node(()); - } -} - -#[should_panic] -#[test] -fn u8_index_overflow() { - let mut gr = Graph::<_, (), Undirected, u8>::with_capacity(0, 0); - for _ in 0..256 { - gr.add_node(()); - } -} - -#[should_panic] -#[test] -fn u8_index_overflow_edges() { - let mut gr = Graph::<_, (), Undirected, u8>::with_capacity(0, 0); - let a = gr.add_node('a'); - let b = gr.add_node('b'); - for _ in 0..256 { - gr.add_edge(a, b, ()); - } -} - -#[test] -fn test_weight_iterators() { - let mut gr = Graph::<_, _>::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - let g = gr.add_node("G"); - gr.add_edge(a, b, 7.0); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - - assert_eq!(gr.node_weights_mut().count(), gr.node_count()); - assert_eq!(gr.edge_weights_mut().count(), gr.edge_count()); - - // add a disjoint part - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - - assert_eq!(gr.node_weights_mut().count(), gr.node_count()); - assert_eq!(gr.edge_weights_mut().count(), gr.edge_count()); - - for nw in gr.node_weights_mut() { - *nw = "x"; - } - for node in gr.raw_nodes() { - assert_eq!(node.weight, "x"); - } - - let old = gr.clone(); - for (index, ew) in gr.edge_weights_mut().enumerate() { - assert_eq!(old[EdgeIndex::new(index)], *ew); - *ew = -*ew; - } - for (index, edge) in gr.raw_edges().iter().enumerate() { - assert_eq!(edge.weight, -1. * old[EdgeIndex::new(index)]); - } -} - -#[test] -fn walk_edges() { - let mut gr = Graph::<_, _>::new(); - let a = gr.add_node(0.); - let b = gr.add_node(1.); - let c = gr.add_node(2.); - let d = gr.add_node(3.); - let e0 = gr.add_edge(a, b, 0.); - let e1 = gr.add_edge(a, d, 0.); - let e2 = gr.add_edge(b, c, 0.); - let e3 = gr.add_edge(c, a, 0.); - - // Set edge weights to difference: target - source. - let mut dfs = Dfs::new(&gr, a); - while let Some(source) = dfs.next(&gr) { - let mut edges = gr.neighbors_directed(source, Outgoing).detach(); - while let Some((edge, target)) = edges.next(&gr) { - gr[edge] = gr[target] - gr[source]; - } - } - assert_eq!(gr[e0], 1.); - assert_eq!(gr[e1], 3.); - assert_eq!(gr[e2], 1.); - assert_eq!(gr[e3], -2.); - - let mut nedges = 0; - let mut dfs = Dfs::new(&gr, a); - while let Some(node) = dfs.next(&gr) { - let mut edges = gr.neighbors_directed(node, Incoming).detach(); - while let Some((edge, source)) = edges.next(&gr) { - assert_eq!(gr.find_edge(source, node), Some(edge)); - nedges += 1; - } - - let mut edges = gr.neighbors_directed(node, Outgoing).detach(); - while let Some((edge, target)) = edges.next(&gr) { - assert_eq!(gr.find_edge(node, target), Some(edge)); - nedges += 1; - } - } - assert_eq!(nedges, 8); -} - -#[test] -fn index_twice_mut() { - let mut gr = Graph::<_, _>::new(); - let a = gr.add_node(0.); - let b = gr.add_node(0.); - let c = gr.add_node(0.); - let d = gr.add_node(0.); - let e = gr.add_node(0.); - let f = gr.add_node(0.); - let g = gr.add_node(0.); - gr.add_edge(a, b, 7.0); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - - for dir in &[Incoming, Outgoing] { - for nw in gr.node_weights_mut() { - *nw = 0.; - } - - // walk the graph and sum incoming edges - let mut dfs = Dfs::new(&gr, a); - while let Some(node) = dfs.next(&gr) { - let mut edges = gr.neighbors_directed(node, *dir).detach(); - while let Some(edge) = edges.next_edge(&gr) { - let (nw, ew) = gr.index_twice_mut(node, edge); - *nw += *ew; - } - } - - // check the sums - for i in 0..gr.node_count() { - let ni = NodeIndex::new(i); - let s = gr - .edges_directed(ni, *dir) - .map(|e| *e.weight()) - .fold(0., |a, b| a + b); - assert_eq!(s, gr[ni]); - } - println!("Sum {:?}: {:?}", dir, gr); - } -} - -fn make_edge_iterator_graph<Ty: EdgeType>() -> Graph<f64, f64, Ty> { - let mut gr = Graph::default(); - let a = gr.add_node(0.); - let b = gr.add_node(0.); - let c = gr.add_node(0.); - let d = gr.add_node(0.); - let e = gr.add_node(0.); - let f = gr.add_node(0.); - let g = gr.add_node(0.); - gr.add_edge(a, b, 7.0); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, c, 8.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - - gr -} - -#[test] -fn test_edge_iterators_directed() { - let gr = make_edge_iterator_graph::<Directed>(); - - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Outgoing), gr.edges(i)); - - // Reversed reverses edges, so target and source need to be reversed once more. - itertools::assert_equal( - gr.edges_directed(i, Outgoing) - .map(|edge| (edge.source(), edge.target())), - Reversed(&gr) - .edges_directed(i, Incoming) - .map(|edge| (edge.target(), edge.source())), - ); - - for edge in gr.edges_directed(i, Outgoing) { - assert_eq!( - edge.source(), - i, - "outgoing edges should have a fixed source" - ); - } - for edge in Reversed(&gr).edges_directed(i, Incoming) { - assert_eq!( - edge.target(), - i, - "reversed incoming edges should have a fixed target" - ); - } - } - - let mut reversed_gr = gr.clone(); - reversed_gr.reverse(); - - println!("{:#?}", gr); - for i in gr.node_indices() { - // Compare against reversed graphs two different ways: using .reverse() and Reversed. - itertools::assert_equal(gr.edges_directed(i, Incoming), reversed_gr.edges(i)); - - // Reversed reverses edges, so target and source need to be reversed once more. - itertools::assert_equal( - gr.edges_directed(i, Incoming) - .map(|edge| (edge.source(), edge.target())), - Reversed(&gr) - .edges(i) - .map(|edge| (edge.target(), edge.source())), - ); - - for edge in gr.edges_directed(i, Incoming) { - assert_eq!( - edge.target(), - i, - "incoming edges should have a fixed target" - ); - } - for edge in Reversed(&gr).edges_directed(i, Outgoing) { - assert_eq!( - edge.source(), - i, - "reversed outgoing edges should have a fixed source" - ); - } - } -} - -#[test] -fn test_edge_filtered_iterators_directed() { - use petgraph::{ - graph::EdgeReference, - visit::{EdgeFiltered, IntoEdgesDirected}, - }; - - let gr = make_edge_iterator_graph::<Directed>(); - let filter = |edge: EdgeReference<f64>| -> bool { *edge.weight() > 8.0 }; - let filtered = EdgeFiltered::from_fn(&gr, filter); - - for i in gr.node_indices() { - itertools::assert_equal( - filtered.edges_directed(i, Outgoing), - gr.edges_directed(i, Outgoing).filter(|edge| filter(*edge)), - ); - itertools::assert_equal( - filtered.edges_directed(i, Incoming), - gr.edges_directed(i, Incoming).filter(|edge| filter(*edge)), - ); - } -} - -#[test] -fn test_node_filtered_iterators_directed() { - use petgraph::{ - graph::NodeIndex, - visit::{IntoEdgesDirected, NodeFiltered}, - }; - - let gr = make_edge_iterator_graph::<Directed>(); - let filter = |node: NodeIndex<u32>| node.index() < 5; // < 5 makes sure there are edges going both ways between included and excluded nodes (e -> g, f -> e) - let filtered = NodeFiltered::from_fn(&gr, filter); - - for i in gr.node_indices() { - itertools::assert_equal( - filtered.edges_directed(i, Outgoing), - gr.edges_directed(i, Outgoing) - .filter(|edge| filter(edge.source()) && filter(edge.target())), - ); - itertools::assert_equal( - filtered.edges_directed(i, Incoming), - gr.edges_directed(i, Incoming) - .filter(|edge| filter(edge.source()) && filter(edge.target())), - ); - } -} - -#[test] -fn test_edge_iterators_undir() { - let gr = make_edge_iterator_graph::<Undirected>(); - - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Outgoing), gr.edges(i)); - - // Reversed reverses edges, so target and source need to be reversed once more. - itertools::assert_equal( - gr.edges_directed(i, Outgoing) - .map(|edge| (edge.source(), edge.target())), - Reversed(&gr) - .edges_directed(i, Incoming) - .map(|edge| (edge.target(), edge.source())), - ); - - for edge in gr.edges_directed(i, Outgoing) { - assert_eq!( - edge.source(), - i, - "outgoing edges should have a fixed source" - ); - } - for edge in Reversed(&gr).edges_directed(i, Incoming) { - assert_eq!( - edge.target(), - i, - "reversed incoming edges should have a fixed target" - ); - } - } - - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Incoming), gr.edges(i)); - - // Reversed reverses edges, so target and source need to be reversed once more. - itertools::assert_equal( - gr.edges_directed(i, Incoming) - .map(|edge| (edge.source(), edge.target())), - Reversed(&gr) - .edges(i) - .map(|edge| (edge.target(), edge.source())), - ); - - for edge in gr.edges_directed(i, Incoming) { - assert_eq!( - edge.target(), - i, - "incoming edges should have a fixed target" - ); - } - for edge in Reversed(&gr).edges_directed(i, Outgoing) { - assert_eq!( - edge.source(), - i, - "reversed outgoing edges should have a fixed source" - ); - } - } -} - -#[test] -fn toposort_generic() { - // This is a DAG, visit it in order - let mut gr = Graph::<_, _>::new(); - let b = gr.add_node(("B", 0.)); - let a = gr.add_node(("A", 0.)); - let c = gr.add_node(("C", 0.)); - let d = gr.add_node(("D", 0.)); - let e = gr.add_node(("E", 0.)); - let f = gr.add_node(("F", 0.)); - let g = gr.add_node(("G", 0.)); - gr.add_edge(a, b, 7.0); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - - assert!(!pg::algo::is_cyclic_directed(&gr)); - let mut index = 0.; - let mut topo = Topo::new(&gr); - while let Some(nx) = topo.next(&gr) { - gr[nx].1 = index; - index += 1.; - } - - let mut order = Vec::new(); - index = 0.; - let mut topo = Topo::new(&gr); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - assert_eq!(gr[nx].1, index); - index += 1.; - } - println!("{:?}", gr); - assert_is_topo_order(&gr, &order); - - { - order.clear(); - let init_nodes = gr.node_identifiers().filter(|n| { - gr.neighbors_directed(*n, Direction::Incoming) - .next() - .is_none() - }); - let mut topo = Topo::with_initials(&gr, init_nodes); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - } - assert_is_topo_order(&gr, &order); - } - - { - // test `with_initials` API using nodes with incoming edges - order.clear(); - let mut topo = Topo::with_initials(&gr, gr.node_identifiers()); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - } - assert_is_topo_order(&gr, &order); - } - - { - order.clear(); - let mut topo = Topo::new(&gr); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - } - println!("{:?}", gr); - assert_is_topo_order(&gr, &order); - } - let mut gr2 = gr.clone(); - gr.add_edge(e, d, -1.); - assert!(pg::algo::is_cyclic_directed(&gr)); - assert!(pg::algo::toposort(&gr, None).is_err()); - gr2.add_edge(d, d, 0.); - assert!(pg::algo::is_cyclic_directed(&gr2)); - assert!(pg::algo::toposort(&gr2, None).is_err()); -} - -#[test] -fn test_has_path() { - // This is a DAG, visit it in order - let mut gr = Graph::<_, _>::new(); - let b = gr.add_node(("B", 0.)); - let a = gr.add_node(("A", 0.)); - let c = gr.add_node(("C", 0.)); - let d = gr.add_node(("D", 0.)); - let e = gr.add_node(("E", 0.)); - let f = gr.add_node(("F", 0.)); - let g = gr.add_node(("G", 0.)); - gr.add_edge(a, b, 7.0); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - // disconnected island - - let h = gr.add_node(("H", 0.)); - let i = gr.add_node(("I", 0.)); - gr.add_edge(h, i, 2.); - gr.add_edge(i, h, -2.); - - let mut state = DfsSpace::default(); - - gr.add_edge(b, a, 99.); - - assert!(has_path_connecting(&gr, c, c, None)); - - for edge in gr.edge_references() { - assert!(has_path_connecting(&gr, edge.source(), edge.target(), None)); - } - assert!(has_path_connecting(&gr, a, g, Some(&mut state))); - assert!(!has_path_connecting(&gr, a, h, Some(&mut state))); - assert!(has_path_connecting(&gr, a, c, None)); - assert!(has_path_connecting(&gr, a, c, Some(&mut state))); - assert!(!has_path_connecting(&gr, h, a, Some(&mut state))); -} - -#[test] -fn map_filter_map() { - let mut g = Graph::new_undirected(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - let f = g.add_node("F"); - g.add_edge(a, b, 7); - g.add_edge(c, a, 9); - g.add_edge(a, d, 14); - g.add_edge(b, c, 10); - g.add_edge(d, c, 2); - g.add_edge(d, e, 9); - g.add_edge(b, f, 15); - g.add_edge(c, f, 11); - g.add_edge(e, f, 6); - println!("{:?}", g); - - let g2 = g.filter_map( - |_, name| Some(*name), - |_, &weight| if weight >= 10 { Some(weight) } else { None }, - ); - assert_eq!(g2.edge_count(), 4); - for edge in g2.raw_edges() { - assert!(edge.weight >= 10); - } - - let g3 = g.filter_map( - |i, &name| if i == a || i == e { None } else { Some(name) }, - |i, &weight| { - let (source, target) = g.edge_endpoints(i).unwrap(); - // don't map edges from a removed node - assert!(source != a); - assert!(target != a); - assert!(source != e); - assert!(target != e); - Some(weight) - }, - ); - assert_eq!(g3.node_count(), g.node_count() - 2); - assert_eq!(g3.edge_count(), g.edge_count() - 5); - assert_graph_consistent(&g3); - - let mut g4 = g.clone(); - g4.retain_edges(|gr, i| { - let (s, t) = gr.edge_endpoints(i).unwrap(); - !(s == a || s == e || t == a || t == e) - }); - assert_eq!(g4.edge_count(), g.edge_count() - 5); - assert_graph_consistent(&g4); -} - -#[test] -fn from_edges() { - let n = NodeIndex::new; - let gr = - Graph::<(), (), Undirected>::from_edges(&[(0, 1), (0, 2), (0, 3), (1, 2), (1, 3), (2, 3)]); - assert_eq!(gr.node_count(), 4); - assert_eq!(gr.edge_count(), 6); - assert_eq!(gr.neighbors(n(0)).count(), 3); - assert_eq!(gr.neighbors(n(1)).count(), 3); - assert_eq!(gr.neighbors(n(2)).count(), 3); - assert_eq!(gr.neighbors(n(3)).count(), 3); - assert_graph_consistent(&gr); -} - -#[test] -fn retain() { - let mut gr = Graph::<i32, i32, Undirected>::from_edges(&[ - (0, 1, 2), - (1, 1, 1), - (0, 2, 0), - (1, 2, 3), - (2, 3, 3), - ]); - gr.retain_edges(|mut gr, i| { - if gr[i] <= 0 { - false - } else { - gr[i] -= 1; - let (s, t) = gr.edge_endpoints(i).unwrap(); - gr[s] += 1; - gr[t] += 1; - - gr[i] > 0 - } - }); - - assert_eq!(gr.edge_count(), 3); - assert_eq!(gr[n(0)], 1); - assert_eq!(gr[n(1)], 4); - assert_eq!(gr[n(2)], 2); - assert_eq!(gr[n(3)], 1); - assert!(gr.find_edge(n(1), n(1)).is_none()); - assert!(gr.find_edge(n(0), n(2)).is_none()); - assert_graph_consistent(&gr); -} - -fn assert_graph_consistent<N, E, Ty, Ix>(g: &Graph<N, E, Ty, Ix>) -where - Ty: EdgeType, - Ix: IndexType, -{ - assert_eq!(g.node_count(), g.node_indices().count()); - assert_eq!(g.edge_count(), g.edge_indices().count()); - for edge in g.raw_edges() { - assert!( - g.find_edge(edge.source(), edge.target()).is_some(), - "Edge not in graph! {:?} to {:?}", - edge.source(), - edge.target() - ); - } -} - -#[test] -fn neighbors_selfloops() { - // Directed graph - let mut gr = Graph::<_, ()>::new(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - gr.extend_with_edges(&[(a, a), (a, b), (c, a), (a, a)]); - - let out_edges = [a, a, b]; - let in_edges = [a, a, c]; - let undir_edges = [a, a, b, c]; - let mut seen_out = gr.neighbors(a).collect::<Vec<_>>(); - seen_out.sort(); - assert_eq!(&seen_out, &out_edges); - let mut seen_in = gr.neighbors_directed(a, Incoming).collect::<Vec<_>>(); - seen_in.sort(); - assert_eq!(&seen_in, &in_edges); - - let mut seen_undir = gr.neighbors_undirected(a).collect::<Vec<_>>(); - seen_undir.sort(); - assert_eq!(&seen_undir, &undir_edges); - - let mut seen_out = gr.edges(a).map(|e| e.target()).collect::<Vec<_>>(); - seen_out.sort(); - assert_eq!(&seen_out, &out_edges); - - let mut seen_walk = Vec::new(); - let mut walk = gr.neighbors(a).detach(); - while let Some(n) = walk.next_node(&gr) { - seen_walk.push(n); - } - seen_walk.sort(); - assert_eq!(&seen_walk, &out_edges); - - seen_walk.clear(); - let mut walk = gr.neighbors_directed(a, Incoming).detach(); - while let Some(n) = walk.next_node(&gr) { - seen_walk.push(n); - } - seen_walk.sort(); - assert_eq!(&seen_walk, &in_edges); - - seen_walk.clear(); - let mut walk = gr.neighbors_undirected(a).detach(); - while let Some(n) = walk.next_node(&gr) { - seen_walk.push(n); - } - seen_walk.sort(); - assert_eq!(&seen_walk, &undir_edges); - - // Undirected graph - let mut gr: Graph<_, (), _> = Graph::new_undirected(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - gr.extend_with_edges(&[(a, a), (a, b), (c, a)]); - - let out_edges = [a, b, c]; - let in_edges = [a, b, c]; - let undir_edges = [a, b, c]; - let mut seen_out = gr.neighbors(a).collect::<Vec<_>>(); - seen_out.sort(); - assert_eq!(&seen_out, &out_edges); - - let mut seen_out = gr.edges(a).map(|e| e.target()).collect::<Vec<_>>(); - seen_out.sort(); - assert_eq!(&seen_out, &out_edges); - - let mut seen_in = gr.neighbors_directed(a, Incoming).collect::<Vec<_>>(); - seen_in.sort(); - assert_eq!(&seen_in, &in_edges); - - let mut seen_undir = gr.neighbors_undirected(a).collect::<Vec<_>>(); - seen_undir.sort(); - assert_eq!(&seen_undir, &undir_edges); -} - -fn degree<G>(g: G, node: G::NodeId) -> usize -where - G: IntoNeighbors, - G::NodeId: PartialEq, -{ - // self loops count twice - let original_node = node; - let mut degree = 0; - for v in g.neighbors(node) { - degree += if v == original_node { 2 } else { 1 }; - } - degree -} - -#[cfg(feature = "graphmap")] -#[test] -fn degree_sequence() { - let mut gr = Graph::<usize, (), Undirected>::from_edges(&[ - (0, 1), - (1, 2), - (1, 3), - (2, 4), - (3, 4), - (4, 4), - (4, 5), - (3, 5), - ]); - gr.add_node(0); // add isolated node - let mut degree_sequence = gr - .node_indices() - .map(|i| degree(&gr, i)) - .collect::<Vec<_>>(); - - degree_sequence.sort_by(|x, y| Ord::cmp(y, x)); - assert_eq!(°ree_sequence, &[5, 3, 3, 2, 2, 1, 0]); - - let mut gr = GraphMap::<_, (), Undirected>::from_edges(&[ - (0, 1), - (1, 2), - (1, 3), - (2, 4), - (3, 4), - (4, 4), - (4, 5), - (3, 5), - ]); - gr.add_node(6); // add isolated node - let mut degree_sequence = gr.nodes().map(|i| degree(&gr, i)).collect::<Vec<_>>(); - - degree_sequence.sort_by(|x, y| Ord::cmp(y, x)); - assert_eq!(°ree_sequence, &[5, 3, 3, 2, 2, 1, 0]); -} - -#[test] -fn neighbor_order() { - let mut gr = Graph::new(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - gr.add_edge(a, b, 0); - gr.add_edge(a, a, 1); - - gr.add_edge(c, a, 2); - - gr.add_edge(a, c, 3); - - gr.add_edge(c, a, 4); - gr.add_edge(b, a, 5); - - // neighbors (edges) are in lifo order, if it's a directed graph - assert_eq!(gr.neighbors(a).collect::<Vec<_>>(), vec![c, a, b]); - assert_eq!( - gr.neighbors_directed(a, Incoming).collect::<Vec<_>>(), - vec![b, c, c, a] - ); -} - -#[test] -fn dot() { - // test alternate formatting - #[derive(Debug)] - #[allow(unused)] - struct Record { - a: i32, - b: &'static str, - } - let mut gr = Graph::new(); - let a = gr.add_node(Record { a: 1, b: r"abc\" }); - gr.add_edge(a, a, (1, 2)); - let dot_output = format!("{:?}", Dot::new(&gr)); - assert_eq!( - dot_output, - // The single \ turns into four \\\\ because of Debug which turns it to \\ and then escaping each \ to \\. - r#"digraph { - 0 [ label = "Record { a: 1, b: \"abc\\\\\" }" ] - 0 -> 0 [ label = "(1, 2)" ] -} -"# - ); -} - -#[test] -fn filtered() { - let mut g = Graph::new(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - let f = g.add_node("F"); - g.add_edge(a, b, 7); - g.add_edge(c, a, 9); - g.add_edge(a, d, 14); - g.add_edge(b, c, 10); - g.add_edge(d, c, 2); - g.add_edge(d, e, 9); - g.add_edge(b, f, 15); - g.add_edge(c, f, 11); - g.add_edge(e, f, 6); - println!("{:?}", g); - - let filt = NodeFiltered(&g, |n: NodeIndex| n != c && n != e); - - let mut dfs = DfsPostOrder::new(&filt, a); - let mut po = Vec::new(); - while let Some(nx) = dfs.next(&filt) { - println!("Next: {:?}", nx); - po.push(nx); - } - assert_eq!(set(po), set(g.node_identifiers().filter(|n| (filt.1)(*n)))); -} - -#[test] -fn filtered_edge_reverse() { - use petgraph::visit::EdgeFiltered; - #[derive(Eq, PartialEq)] - enum E { - A, - B, - } - - // Start with single node graph with loop - let mut g = Graph::new(); - let a = g.add_node("A"); - g.add_edge(a, a, E::A); - let ef_a = EdgeFiltered::from_fn(&g, |edge| *edge.weight() == E::A); - let mut po = Vec::new(); - let mut dfs = Dfs::new(&ef_a, a); - while let Some(next_n_ix) = dfs.next(&ef_a) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![a])); - - // Check in reverse - let mut po = Vec::new(); - let mut dfs = Dfs::new(&Reversed(&ef_a), a); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_a)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![a])); - - let mut g = Graph::new(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - let f = g.add_node("F"); - let h = g.add_node("H"); - let i = g.add_node("I"); - let j = g.add_node("J"); - - g.add_edge(a, b, E::A); - g.add_edge(b, c, E::A); - g.add_edge(c, d, E::B); - g.add_edge(d, e, E::A); - g.add_edge(e, f, E::A); - g.add_edge(e, h, E::A); - g.add_edge(e, i, E::A); - g.add_edge(i, j, E::A); - - let ef_a = EdgeFiltered::from_fn(&g, |edge| *edge.weight() == E::A); - let ef_b = EdgeFiltered::from_fn(&g, |edge| *edge.weight() == E::B); - - // DFS down from a, filtered by E::A. - let mut po = Vec::new(); - let mut dfs = Dfs::new(&ef_a, a); - while let Some(next_n_ix) = dfs.next(&ef_a) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![a, b, c])); - - // Reversed DFS from f, filtered by E::A. - let mut dfs = Dfs::new(&Reversed(&ef_a), f); - let mut po = Vec::new(); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_a)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![d, e, f])); - - // Reversed DFS from j, filtered by E::A. - let mut dfs = Dfs::new(&Reversed(&ef_a), j); - let mut po = Vec::new(); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_a)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![d, e, i, j])); - - // Reversed DFS from c, filtered by E::A. - let mut dfs = Dfs::new(&Reversed(&ef_a), c); - let mut po = Vec::new(); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_a)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![a, b, c])); - - // Reversed DFS from c, filtered by E::B. - let mut dfs = Dfs::new(&Reversed(&ef_b), c); - let mut po = Vec::new(); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_b)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![c])); - - // Reversed DFS from d, filtered by E::B. - let mut dfs = Dfs::new(&Reversed(&ef_b), d); - let mut po = Vec::new(); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_b)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![c, d])); - - // Now let's test the same graph but undirected - - let mut g = Graph::new_undirected(); - let a = g.add_node("A"); - let b = g.add_node("B"); - let c = g.add_node("C"); - let d = g.add_node("D"); - let e = g.add_node("E"); - let f = g.add_node("F"); - let h = g.add_node("H"); - let i = g.add_node("I"); - let j = g.add_node("J"); - - g.add_edge(a, b, E::A); - g.add_edge(b, c, E::A); - g.add_edge(c, d, E::B); - g.add_edge(d, e, E::A); - g.add_edge(e, f, E::A); - g.add_edge(e, h, E::A); - g.add_edge(e, i, E::A); - g.add_edge(i, j, E::A); - - let ef_a = EdgeFiltered::from_fn(&g, |edge| *edge.weight() == E::A); - let ef_b = EdgeFiltered::from_fn(&g, |edge| *edge.weight() == E::B); - let mut po = Vec::new(); - let mut dfs = Dfs::new(&Reversed(&ef_b), d); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_b)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![c, d])); - - let mut po = Vec::new(); - let mut dfs = Dfs::new(&Reversed(&ef_a), h); - while let Some(next_n_ix) = dfs.next(&Reversed(&ef_a)) { - po.push(next_n_ix); - } - assert_eq!(set(po), set(vec![d, e, f, h, i, j])); -} - -#[test] -fn dfs_visit() { - use petgraph::visit::Control; - use petgraph::visit::DfsEvent::*; - use petgraph::visit::{depth_first_search, Time}; - use petgraph::visit::{VisitMap, Visitable}; - let gr: Graph<(), ()> = Graph::from_edges(&[ - (0, 5), - (0, 2), - (0, 3), - (0, 1), - (1, 3), - (2, 3), - (2, 4), - (4, 0), - (4, 5), - ]); - - let invalid_time = Time(!0); - let mut discover_time = vec![invalid_time; gr.node_count()]; - let mut finish_time = vec![invalid_time; gr.node_count()]; - let mut has_tree_edge = gr.visit_map(); - let mut edges = HashSet::new(); - depth_first_search(&gr, Some(n(0)), |evt| { - println!("Event: {:?}", evt); - match evt { - Discover(n, t) => discover_time[n.index()] = t, - Finish(n, t) => finish_time[n.index()] = t, - TreeEdge(u, v) => { - // v is an ancestor of u - assert!(has_tree_edge.visit(v), "Two tree edges to {:?}!", v); - assert!(discover_time[v.index()] == invalid_time); - assert!(discover_time[u.index()] != invalid_time); - assert!(finish_time[u.index()] == invalid_time); - edges.insert((u, v)); - } - BackEdge(u, v) => { - // u is an ancestor of v - assert!(discover_time[v.index()] != invalid_time); - assert!(finish_time[v.index()] == invalid_time); - edges.insert((u, v)); - } - CrossForwardEdge(u, v) => { - edges.insert((u, v)); - } - } - }); - assert!(discover_time.iter().all(|x| *x != invalid_time)); - assert!(finish_time.iter().all(|x| *x != invalid_time)); - assert_eq!(edges.len(), gr.edge_count()); - assert_eq!( - edges, - set(gr.edge_references().map(|e| (e.source(), e.target()))) - ); - println!("{:?}", discover_time); - println!("{:?}", finish_time); - - // find path from 0 to 4 - let mut predecessor = vec![NodeIndex::end(); gr.node_count()]; - let start = n(0); - let goal = n(4); - let ret = depth_first_search(&gr, Some(start), |event| { - if let TreeEdge(u, v) = event { - predecessor[v.index()] = u; - if v == goal { - return Control::Break(u); - } - } - Control::Continue - }); - // assert we did terminate early - assert!(ret.break_value().is_some()); - assert!(predecessor.iter().any(|x| *x == NodeIndex::end())); - - let mut next = goal; - let mut path = vec![next]; - while next != start { - let pred = predecessor[next.index()]; - path.push(pred); - next = pred; - } - path.reverse(); - assert_eq!(&path, &[n(0), n(2), n(4)]); - - // check that if we prune 2, we never see 4. - let start = n(0); - let prune = n(2); - let nongoal = n(4); - let ret = depth_first_search(&gr, Some(start), |event| { - if let Discover(n, _) = event { - if n == prune { - return Control::Prune; - } - } else if let TreeEdge(u, v) = event { - if v == nongoal { - return Control::Break(u); - } - } - Control::Continue - }); - assert!(ret.break_value().is_none()); -} - -#[test] -fn filtered_post_order() { - use petgraph::visit::NodeFiltered; - - let mut gr: Graph<(), ()> = - Graph::from_edges(&[(0, 2), (1, 2), (0, 3), (1, 4), (2, 4), (4, 5), (3, 5)]); - // map reachable nodes - let mut dfs = Dfs::new(&gr, n(0)); - while dfs.next(&gr).is_some() {} - - let map = dfs.discovered; - gr.add_edge(n(0), n(1), ()); - let mut po = Vec::new(); - let mut dfs = DfsPostOrder::new(&gr, n(0)); - let f = NodeFiltered(&gr, map); - while let Some(n) = dfs.next(&f) { - po.push(n); - } - assert!(!po.contains(&n(1))); -} - -#[test] -fn filter_elements() { - use petgraph::data::Element::{Edge, Node}; - use petgraph::data::ElementIterator; - use petgraph::data::FromElements; - let elements = vec![ - Node { weight: "A" }, - Node { weight: "B" }, - Node { weight: "C" }, - Node { weight: "D" }, - Node { weight: "E" }, - Node { weight: "F" }, - Edge { - source: 0, - target: 1, - weight: 7, - }, - Edge { - source: 2, - target: 0, - weight: 9, - }, - Edge { - source: 0, - target: 3, - weight: 14, - }, - Edge { - source: 1, - target: 2, - weight: 10, - }, - Edge { - source: 3, - target: 2, - weight: 2, - }, - Edge { - source: 3, - target: 4, - weight: 9, - }, - Edge { - source: 1, - target: 5, - weight: 15, - }, - Edge { - source: 2, - target: 5, - weight: 11, - }, - Edge { - source: 4, - target: 5, - weight: 6, - }, - ]; - let mut g = DiGraph::<_, _>::from_elements(elements.iter().cloned()); - println!("{:#?}", g); - assert!(g.contains_edge(n(1), n(5))); - let g2 = - DiGraph::<_, _>::from_elements(elements.iter().cloned().filter_elements(|elt| match elt { - Node { ref weight } if **weight == "B" => false, - _ => true, - })); - println!("{:#?}", g2); - g.remove_node(n(1)); - assert!(is_isomorphic_matching( - &g, - &g2, - PartialEq::eq, - PartialEq::eq - )); -} - -#[test] -fn test_edge_filtered() { - use petgraph::algo::connected_components; - use petgraph::visit::EdgeFiltered; - use petgraph::visit::IntoEdgeReferences; - - let gr = UnGraph::<(), _>::from_edges(&[ - // cycle - (0, 1, 7), - (1, 2, 9), - (2, 1, 14), - // cycle - (3, 4, 10), - (4, 5, 2), - (5, 3, 9), - // cross edges - (0, 3, -1), - (1, 4, -2), - (2, 5, -3), - ]); - assert_eq!(connected_components(&gr), 1); - let positive_edges = EdgeFiltered::from_fn(&gr, |edge| *edge.weight() >= 0); - assert_eq!(positive_edges.edge_references().count(), 6); - assert!(positive_edges - .edge_references() - .all(|edge| *edge.weight() >= 0)); - assert_eq!(connected_components(&positive_edges), 2); - - let mut dfs = DfsPostOrder::new(&positive_edges, n(0)); - while dfs.next(&positive_edges).is_some() {} - - let n = n::<u32>; - for node in &[n(0), n(1), n(2)] { - assert!(dfs.discovered.is_visited(node)); - } - for node in &[n(3), n(4), n(5)] { - assert!(!dfs.discovered.is_visited(node)); - } -} - -#[test] -fn test_dominators_simple_fast() { - // Construct the following graph: - // - // .-----. - // | <--------------------------------. - // .--------+--------------| r |--------------. | - // | | | | | | - // | | '-----' | | - // | .--V--. .--V--. | - // | | | | | | - // | | b | | c |--------. | - // | | | | | | | - // | '-----' '-----' | | - // .--V--. | | .--V--. | - // | | | | | | | - // | a <-----+ | .----| g | | - // | | | .----' | | | | - // '-----' | | | '-----' | - // | | | | | | - // .--V--. | .-----. .--V--. | | | - // | | | | | | | | | | - // | d <-----+----> e <----. | f | | | | - // | | | | | | | | | | - // '-----' '-----' | '-----' | | | - // | .-----. | | | | .--V--. | - // | | | | | | .-' | | | - // '-----> l | | | | | | j | | - // | | '--. | | | | | | - // '-----' | | | | '-----' | - // | .--V--. | | .--V--. | | - // | | | | | | | | | - // '-------> h |-' '---> i <------' | - // | | .---------> | | - // '-----' | '-----' | - // | .-----. | | - // | | | | | - // '----------> k <---------' | - // | | | - // '-----' | - // | | - // '----------------------------' - // - // This graph has the following dominator tree: - // - // r - // |-- a - // |-- b - // |-- c - // | |-- f - // | `-- g - // | `-- j - // |-- d - // | `-- l - // |-- e - // |-- i - // |-- k - // `-- h - // - // This graph and dominator tree are taken from figures 1 and 2 of "A Fast - // Algorithm for Finding Dominators in a Flowgraph" by Lengauer et al: - // http://www.cs.princeton.edu/courses/archive/spr03/cs423/download/dominators.pdf. - - let mut graph = DiGraph::<_, _>::new(); - - let r = graph.add_node("r"); - let a = graph.add_node("a"); - let b = graph.add_node("b"); - let c = graph.add_node("c"); - let d = graph.add_node("d"); - let e = graph.add_node("e"); - let f = graph.add_node("f"); - let g = graph.add_node("g"); - let h = graph.add_node("h"); - let i = graph.add_node("i"); - let j = graph.add_node("j"); - let k = graph.add_node("k"); - let l = graph.add_node("l"); - - graph.add_edge(r, a, ()); - graph.add_edge(r, b, ()); - graph.add_edge(r, c, ()); - graph.add_edge(a, d, ()); - graph.add_edge(b, a, ()); - graph.add_edge(b, d, ()); - graph.add_edge(b, e, ()); - graph.add_edge(c, f, ()); - graph.add_edge(c, g, ()); - graph.add_edge(d, l, ()); - graph.add_edge(e, h, ()); - graph.add_edge(f, i, ()); - graph.add_edge(g, i, ()); - graph.add_edge(g, j, ()); - graph.add_edge(h, e, ()); - graph.add_edge(h, k, ()); - graph.add_edge(i, k, ()); - graph.add_edge(j, i, ()); - graph.add_edge(k, r, ()); - graph.add_edge(k, i, ()); - graph.add_edge(l, h, ()); - - let doms = dominators::simple_fast(&graph, r); - - assert_eq!(doms.root(), r); - assert_eq!( - doms.immediate_dominator(r), - None, - "The root node has no idom" - ); - - assert_eq!( - doms.immediate_dominator(a), - Some(r), - "r is the immediate dominator of a" - ); - assert_eq!( - doms.immediate_dominator(b), - Some(r), - "r is the immediate dominator of b" - ); - assert_eq!( - doms.immediate_dominator(c), - Some(r), - "r is the immediate dominator of c" - ); - assert_eq!( - doms.immediate_dominator(f), - Some(c), - "c is the immediate dominator of f" - ); - assert_eq!( - doms.immediate_dominator(g), - Some(c), - "c is the immediate dominator of g" - ); - assert_eq!( - doms.immediate_dominator(j), - Some(g), - "g is the immediate dominator of j" - ); - assert_eq!( - doms.immediate_dominator(d), - Some(r), - "r is the immediate dominator of d" - ); - assert_eq!( - doms.immediate_dominator(l), - Some(d), - "d is the immediate dominator of l" - ); - assert_eq!( - doms.immediate_dominator(e), - Some(r), - "r is the immediate dominator of e" - ); - assert_eq!( - doms.immediate_dominator(i), - Some(r), - "r is the immediate dominator of i" - ); - assert_eq!( - doms.immediate_dominator(k), - Some(r), - "r is the immediate dominator of k" - ); - assert_eq!( - doms.immediate_dominator(h), - Some(r), - "r is the immediate dominator of h" - ); - - let mut graph = graph.clone(); - let z = graph.add_node("z"); - let doms = dominators::simple_fast(&graph, r); - assert_eq!( - doms.immediate_dominator(z), - None, - "nodes that aren't reachable from the root do not have an idom" - ); -} diff --git a/vendor/petgraph/tests/graph6.rs b/vendor/petgraph/tests/graph6.rs deleted file mode 100644 index 52e70d12..00000000 --- a/vendor/petgraph/tests/graph6.rs +++ /dev/null @@ -1,266 +0,0 @@ -use petgraph::{ - csr::Csr, - graph6::{from_graph6_representation, get_graph6_representation, FromGraph6, ToGraph6}, - Graph, Undirected, -}; - -#[cfg(feature = "graphmap")] -use petgraph::graphmap::GraphMap; - -#[cfg(feature = "matrix_graph")] -use petgraph::matrix_graph::MatrixGraph; - -#[cfg(feature = "stable_graph")] -use petgraph::stable_graph::StableGraph; - -#[test] -fn generic_graph6_encoder_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_generic_graph6_encoder(graph6_str, order, edges.to_vec()); - } -} - -fn test_generic_graph6_encoder(expected_graph6_str: &str, order: usize, edges: Vec<(u16, u16)>) { - type G = Graph<(), (), Undirected, u16>; - - // Assert encoded graph6 string is as expected - let mut graph: G = Graph::with_capacity(order, edges.len()); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges); - - let graph6_string = get_graph6_representation(&graph); - assert_eq!(graph6_string, expected_graph6_str); -} - -#[test] -fn graph6_generic_decoder_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_graph6_generic_decoder(graph6_str, order, edges.to_vec()); - } -} - -fn test_graph6_generic_decoder( - graph6_str: &str, - expected_order: usize, - mut expected_edges: Vec<(u16, u16)>, -) { - type G = (usize, Vec<(u16, u16)>); - - let (order, mut edges): G = from_graph6_representation(graph6_str.to_string()); - assert_eq!(order, expected_order, "order should be the same"); - - edges.sort(); - expected_edges.sort(); - assert_eq!(edges, expected_edges, "edges should be the same"); -} - -#[test] -fn graph6_for_graph_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_graph6_for_graph(graph6_str, order, edges.to_vec()); - } -} - -fn test_graph6_for_graph(graph6_str: &str, order: usize, edges: Vec<(u16, u16)>) { - type G = Graph<(), (), Undirected, u16>; - let size = edges.len(); - - // Build test graph - let mut graph: G = Graph::with_capacity(order, size); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges); - - // Assert encoded graph6 string is as expected - let graph6_string = graph.graph6_string(); - assert_eq!(graph6_string, graph6_str); - - // Assert decoded graph properties - let decoded_graph = G::from_graph6_string(graph6_string); - assert_eq!(decoded_graph.node_count(), order); - assert_eq!(decoded_graph.edge_count(), size); - - // Assert re-encoded graph6 string is the same - assert_eq!(decoded_graph.graph6_string(), graph6_str); -} - -#[cfg(feature = "stable_graph")] -#[test] -fn graph6_for_stable_graph_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_graph6_for_stable_graph(graph6_str, order, edges.to_vec()); - } -} - -#[cfg(feature = "stable_graph")] -fn test_graph6_for_stable_graph(graph6_str: &str, order: usize, edges: Vec<(u16, u16)>) { - type G = StableGraph<(), (), Undirected, u16>; - let size = edges.len(); - - // Build test graph - let mut graph = G::with_capacity(order, edges.len()); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges); - - // Assert encoded graph6 string is as expected - let graph6_string = graph.graph6_string(); - assert_eq!(graph6_string, graph6_str); - - // Assert decoded graph properties - let decoded_graph = G::from_graph6_string(graph6_string); - assert_eq!(decoded_graph.node_count(), order); - assert_eq!(decoded_graph.edge_count(), size); - - // Assert re-encoded graph6 string is the same - assert_eq!(decoded_graph.graph6_string(), graph6_str); -} - -#[cfg(feature = "graphmap")] -#[test] -fn graph6_for_graph_map_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_graph6_for_graph_map(graph6_str, order, edges.to_vec()); - } -} - -#[cfg(feature = "graphmap")] -fn test_graph6_for_graph_map(graph6_str: &str, order: usize, edges: Vec<(u16, u16)>) { - type G = GraphMap<u16, (), Undirected>; - let size = edges.len(); - - // Build test graph - let mut graph = G::with_capacity(order, edges.len()); - for i in 0..order { - graph.add_node(i as u16); - } - for (a, b) in edges { - graph.add_edge(a, b, ()); - } - - // Assert encoded graph6 string is as expected - let graph6_string = graph.graph6_string(); - assert_eq!(graph6_string, graph6_str); - - // Assert decoded graph properties - let decoded_graph = G::from_graph6_string(graph6_string); - assert_eq!(decoded_graph.node_count(), order); - assert_eq!(decoded_graph.edge_count(), size); - - // Assert re-encoded graph6 string is the same - assert_eq!(decoded_graph.graph6_string(), graph6_str); -} - -#[cfg(feature = "matrix_graph")] -#[test] -fn graph6_for_matrix_graph_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_graph6_for_matrix_graph(graph6_str, order, edges.to_vec()); - } -} - -#[cfg(feature = "matrix_graph")] -fn test_graph6_for_matrix_graph(graph6_str: &str, order: usize, edges: Vec<(u16, u16)>) { - type G = MatrixGraph<(), (), Undirected>; - let size = edges.len(); - - // Build test graph - let mut graph = G::with_capacity(order); - for _ in 0..order { - graph.add_node(()); - } - graph.extend_with_edges(edges.iter()); - - // Assert encoded graph6 string is as expected - let graph6_string = graph.graph6_string(); - assert_eq!(graph6_string, graph6_str); - - // Assert decoded graph properties - let decoded_graph = G::from_graph6_string(graph6_string); - assert_eq!(decoded_graph.node_count(), order); - assert_eq!(decoded_graph.edge_count(), size); - - // Assert re-encoded graph6 string is the same - assert_eq!(decoded_graph.graph6_string(), graph6_str); -} - -#[test] -fn graph6_for_csr_test_cases() { - for (order, graph6_str, edges) in TEST_CASES { - test_graph6_for_csr(graph6_str, order, edges.to_vec()); - } -} - -fn test_graph6_for_csr(graph6_str: &str, order: usize, edges: Vec<(u16, u16)>) { - type G = Csr<(), (), Undirected, u16>; - let size = edges.len(); - - // Build test graph - let mut graph = G::new(); - let mut nodes = Vec::new(); - for _ in 0..order { - let i = graph.add_node(()); - nodes.push(i); - } - for (a, b) in edges { - graph.add_edge(a, b, ()); - } - - // Assert encoded graph6 string is as expected - let graph6_string = graph.graph6_string(); - assert_eq!(graph6_string, graph6_str); - - // Assert decoded graph properties - let decoded_graph = G::from_graph6_string(graph6_string); - assert_eq!(decoded_graph.node_count(), order); - assert_eq!(decoded_graph.edge_count(), size); - - // Assert re-encoded graph6 string is the same - assert_eq!(decoded_graph.graph6_string(), graph6_str); -} - -// Test cases format: (graph order, expected ghaph6 representation, graph edges) -#[allow(clippy::type_complexity)] -#[rustfmt::skip] -const TEST_CASES: [(usize, &str, &[(u16, u16)]); 20] = [ - // Empty Graphs - (0, r"?", &[]), - (1, r"@", &[]), - (2, r"A?", &[]), - // Small Graphs - (5, r"DQc", &[(0, 2), (0, 4), (1, 3), (3, 4)]), - (5, r"Dhc", &[(0, 1), (0, 4), (1, 2), (2, 3), (3, 4)]), - (5, r"D^k", &[(0, 2), (0, 3), (0, 4), (1, 2), (1, 3), (2, 3), (2, 4), (3, 4)]), - (6, r"E@??", &[(2, 3)]), - (6, r"Ej]o", &[(0, 1), (0, 5), (1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (2, 5), (3, 4), (3, 5)]), - (9, r"H?O??_k", &[(1, 4), (2, 8), (3, 7), (4, 8), (5, 8)]), - (10, r"IrGoS@?o_", &[(0, 1), (0, 2), (0, 7), (0, 9), (1, 3), (1, 8), (1, 9), (2, 3), (2, 4), (2, 5), (3, 5), (4, 6), (6, 9)]), - (10, r"I~~~~~~~w", &[(0, 1), (0, 2), (0, 3), (0, 4), (0, 5), (0, 6), (0, 7), (0, 8), (0, 9), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6), (1, 7), (1, 8), (1, 9), (2, 3), (2, 4), (2, 5), (2, 6), (2, 7), (2, 8), (2, 9), (3, 4), (3, 5), (3, 6), (3, 7), (3, 8), (3, 9), (4, 5), (4, 6), (4, 7), (4, 8), (4, 9), (5, 6), (5, 7), (5, 8), (5, 9), (6, 7), (6, 8), (6, 9), (7, 8), (7, 9), (8, 9)]), - (11, r"Jsa@IchDIS_", &[(6, 10), (9, 10), (6, 7), (7, 8), (8, 9), (0, 1), (0, 2), (0, 3), (0, 4), (0, 5), (1, 10), (1, 7), (2, 6), (2, 8), (3, 7), (3, 9), (4, 10), (4, 8), (5, 6), (5, 9)]), - // Complete Graphs - (2, r"A_", &[(0, 1)]), - (3, r"Bw", &[(0, 1), (0, 2), (1, 2)]), - (5, r"D~{", &[(0, 1), (0, 2), (0, 3), (0, 4), (1, 2), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4)]), - (7, r"F~~~w", &[(0, 1), (0, 2), (0, 3), (0, 4), (0, 5), (0, 6), (1, 2), (1, 3), (1, 4), (1, 5), (1, 6), (2, 3), (2, 4), (2, 5), (2, 6), (3, 4), (3, 5), (3, 6), (4, 5), (4, 6), (5, 6)]), - // Petersen - (10, r"IheA@GUAo", &[(0, 1), (0, 4), (0, 5), (1, 2), (1, 6), (2, 3), (2, 7), (3, 4), (3, 8), (4, 9), (5, 7), (5, 8), (6, 8), (6, 9), (7, 9)]), - // Flower - ( - 20, r"ShCGHC@?GGg@?@?Gp?K??C?CA?G?_G?Cc", - &[(0, 1), (0, 14), (0, 15), (1, 2), (1, 11), (2, 3), (2, 7), (3, 16), (3, 4), (4, 5), (4, 14), (5, 6), (5, 10), (6, 17), (6, 7), (7, 8), (8, 9), (8, 13), (9, 18), (9, 10), (10, 11), (11, 12), (12, 19), (12, 13), (13, 14), (15, 16), (15, 19), (16, 17), (17, 18), (18, 19)], - ), - // Corner Case: order = 62 - ( - 62, r"}x@?xx|G[RO{QRDDMWAJ@XAT\M@IBsP?P[jJKOECP_QKSsL@_Th?mUp@@WC_woIl_nI?AF_ISAGNGxe?pikrJVOwWEqoMKhWGAjk[XPn?WUGrWC]jUjwPJLF@?OU?IGSoqT_rpEM[KCpTvGYBgRvOyJ`\adaY?qsESfR{IQWs?mT}bB@[|?p}MOCOEUZKMw]xKeV[en_EK{eBN?Add?H_@GeE_Bo@?_?PmabQuWc?FHVWcwCLWUF]l??WdIOtyePOc`Sb{SGCU[[__b[OiWnDeCXB@CwW@q_GAYY^eWD[tmoPDf{W]eKjzWCCKOj_", - &[(0, 32), (0, 1), (0, 49), (0, 2), (0, 35), (0, 19), (0, 52), (0, 37), (0, 22), (0, 54), (0, 40), (0, 10), (0, 58), (0, 11), (0, 59), (0, 44), (0, 28), (0, 61), (0, 29), (0, 31), (1, 32), (1, 16), (1, 17), (1, 2), (1, 50), (1, 35), (1, 36), (1, 20), (1, 5), (1, 38), (1, 23), (1, 8), (1, 57), (1, 42), (1, 60), (1, 12), (1, 45), (1, 30), (1, 14), (1, 46), (1, 31), (1, 15), (1, 47), (2, 16), (2, 48), (2, 34), (2, 18), (2, 50), (2, 3), (2, 35), (2, 51), (2, 37), (2, 21), (2, 53), (2, 38), (2, 7), (2, 23), (2, 8), (2, 56), (2, 9), (2, 57), (2, 42), (2, 58), (2, 43), (2, 60), (2, 44), (2, 14), (2, 46), (2, 47), (3, 48), (3, 33), (3, 17), (3, 49), (3, 50), (3, 36), (3, 20), (3, 21), (3, 6), (3, 7), (3, 55), (3, 8), (3, 57), (3, 42), (3, 58), (3, 27), (3, 59), (3, 60), (3, 44), (3, 61), (3, 13), (3, 14), (3, 47), (4, 32), (4, 48), (4, 33), (4, 17), (4, 49), (4, 34), (4, 50), (4, 19), (4, 36), (4, 20), (4, 37), (4, 6), (4, 38), (4, 22), (4, 7), (4, 8), (4, 10), (4, 26), (4, 43), (4, 27), (4, 12), (4, 61), (4, 45), (5, 16), (5, 17), (5, 34), (5, 18), (5, 51), (5, 20), (5, 37), (5, 53), (5, 6), (5, 54), (5, 7), (5, 39), (5, 8), (5, 24), (5, 41), (5, 42), (5, 11), (5, 43), (5, 27), (5, 59), (5, 44), (5, 13), (5, 29), (5, 30), (5, 15), (6, 32), (6, 48), (6, 33), (6, 49), (6, 35), (6, 54), (6, 23), (6, 55), (6, 40), (6, 24), (6, 25), (6, 57), (6, 58), (6, 11), (6, 43), (6, 60), (6, 28), (6, 29), (6, 14), (6, 47), (7, 32), (7, 48), (7, 33), (7, 17), (7, 18), (7, 35), (7, 37), (7, 21), (7, 39), (7, 8), (7, 40), (7, 56), (7, 9), (7, 10), (7, 58), (7, 11), (7, 60), (7, 12), (7, 45), (7, 29), (7, 14), (7, 46), (7, 15), (8, 48), (8, 49), (8, 19), (8, 36), (8, 20), (8, 38), (8, 22), (8, 54), (8, 23), (8, 55), (8, 9), (8, 41), (8, 25), (8, 10), (8, 11), (8, 43), (8, 28), (8, 61), (8, 45), (8, 29), (8, 46), (8, 15), (9, 32), (9, 49), (9, 51), (9, 37), (9, 38), (9, 22), (9, 56), (9, 41), (9, 25), (9, 43), (9, 27), (9, 60), (9, 28), (9, 61), (9, 13), (9, 31), (10, 16), (10, 33), (10, 17), (10, 49), (10, 35), (10, 20), (10, 37), (10, 38), (10, 54), (10, 40), (10, 25), (10, 42), (10, 26), (10, 27), (10, 12), (10, 28), (10, 31), (11, 32), (11, 17), (11, 49), (11, 34), (11, 54), (11, 39), (11, 23), (11, 55), (11, 40), (11, 56), (11, 60), (11, 12), (11, 44), (11, 28), (11, 13), (11, 30), (12, 32), (12, 33), (12, 17), (12, 49), (12, 35), (12, 51), (12, 36), (12, 20), (12, 37), (12, 23), (12, 40), (12, 57), (12, 26), (12, 58), (12, 60), (12, 44), (12, 61), (12, 45), (12, 30), (13, 32), (13, 16), (13, 48), (13, 33), (13, 18), (13, 51), (13, 36), (13, 20), (13, 52), (13, 55), (13, 40), (13, 24), (13, 41), (13, 25), (13, 42), (13, 26), (13, 43), (13, 59), (13, 45), (13, 30), (14, 48), (14, 18), (14, 37), (14, 23), (14, 56), (14, 42), (14, 60), (14, 28), (14, 61), (14, 30), (14, 46), (14, 31), (14, 15), (14, 47), (15, 32), (15, 16), (15, 48), (15, 18), (15, 50), (15, 21), (15, 24), (15, 41), (15, 25), (15, 42), (15, 43), (15, 60), (15, 44), (15, 45), (15, 31), (16, 48), (16, 18), (16, 35), (16, 19), (16, 36), (16, 20), (16, 37), (16, 21), (16, 38), (16, 22), (16, 54), (16, 39), (16, 55), (16, 25), (16, 42), (16, 58), (16, 60), (16, 28), (16, 61), (16, 29), (16, 46), (17, 50), (17, 35), (17, 36), (17, 52), (17, 37), (17, 53), (17, 40), (17, 24), (17, 41), (17, 58), (17, 27), (17, 44), (17, 61), (17, 30), (17, 46), (17, 31), (18, 48), (18, 51), (18, 20), (18, 52), (18, 37), (18, 53), (18, 54), (18, 39), (18, 24), (18, 56), (18, 25), (18, 57), (18, 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47), (41, 48), (41, 50), (41, 53), (41, 56), (41, 58), (41, 59), (41, 60), (41, 46), (42, 52), (42, 60), (42, 44), (42, 45), (42, 46), (43, 48), (43, 52), (43, 57), (43, 60), (43, 46), (43, 47), (44, 48), (44, 51), (44, 53), (44, 55), (44, 57), (44, 59), (44, 60), (44, 61), (44, 47), (45, 48), (45, 52), (45, 53), (45, 56), (45, 59), (45, 60), (45, 61), (46, 49), (46, 52), (46, 53), (46, 55), (46, 58), (47, 49), (47, 56), (47, 58), (48, 56), (48, 57), (48, 59), (49, 52), (49, 59), (49, 60), (49, 61), (50, 52), (50, 57), (50, 60), (51, 55), (51, 56), (51, 57), (52, 54), (52, 56), (52, 57), (53, 54), (53, 56), (53, 57), (54, 55), (54, 61), (55, 60), (56, 58), (56, 59), (56, 60), (56, 61), (57, 58), (57, 60), (58, 59), (58, 60), (58, 61), (59, 61), (60, 61)], - ), - // Corner Case: order = 63 - ( - 63, r"~??~`U@aoLr_G\V`YnUdSA[@PG?CjSvrrFONaJODKrXQMOMEcExcwEILVHfUDsB[rGLhVVYJgI?DRSBAgsFwAVzs@gct_AL`NkAoRCaHOaTGWcgPs{@a_s^HLZBaB_[W_o__U|aRGLpdK@{EJ?xQOCcOksK_X@AI`aleB\KDwlOX?_@`_K@SD?QOQ?dAz]?hb{UYvdRRoQPrGKdgfUKIDQM\mZCjJW|?~XcoyIHEr~HycEDToBFD?_DT?bYNaQaQ`BMAYWuyo@Uz{dQwViiepaHfAdaaGO[CHW]ggCka?s@g@b?cbI[a@`BlU^nFxy?YL?R[GKIPm_", - &[(0, 32), (0, 48), (0, 1), (0, 33), (0, 49), (0, 34), (0, 18), (0, 51), (0, 36), (0, 20), (0, 5), (0, 37), (0, 53), (0, 38), (0, 54), (0, 55), (0, 40), (0, 24), (0, 56), (0, 9), (0, 58), (0, 11), (0, 43), (0, 59), (0, 60), (0, 12), (0, 44), (0, 28), (0, 61), (0, 13), (0, 45), (0, 29), (0, 62), (0, 31), (0, 47), (1, 32), (1, 16), (1, 49), (1, 35), (1, 19), (1, 51), (1, 4), (1, 20), (1, 52), (1, 53), (1, 38), (1, 54), (1, 7), (1, 23), (1, 55), (1, 24), (1, 9), (1, 57), (1, 42), (1, 58), (1, 11), (1, 27), (1, 59), (1, 29), (1, 30), (1, 62), (1, 15), (2, 32), (2, 50), (2, 3), (2, 19), (2, 20), (2, 52), (2, 6), (2, 22), (2, 54), (2, 23), (2, 55), (2, 24), (2, 25), (2, 26), (2, 58), (2, 11), (2, 27), (2, 60), (2, 44), (2, 28), (2, 13), (2, 45), (2, 29), (2, 30), (2, 14), (3, 32), (3, 18), (3, 50), (3, 4), (3, 36), (3, 21), (3, 6), (3, 38), (3, 7), (3, 39), (3, 23), (3, 55), (3, 56), (3, 26), (3, 43), (3, 13), (3, 45), (3, 62), (3, 47), (4, 48), (4, 18), (4, 50), (4, 35), (4, 51), (4, 37), (4, 53), (4, 38), (4, 22), (4, 7), (4, 8), (4, 40), (4, 56), (4, 9), (4, 25), (4, 57), (4, 42), (4, 26), (4, 11), (4, 27), (4, 44), (4, 13), (4, 29), (4, 30), (4, 14), (4, 15), (5, 32), (5, 16), (5, 48), (5, 17), (5, 51), (5, 52), (5, 21), (5, 8), (5, 24), (5, 9), (5, 10), (5, 27), (5, 12), (5, 44), (5, 28), (5, 61), (5, 13), (5, 45), (5, 46), (5, 15), (6, 48), (6, 18), (6, 50), (6, 35), (6, 19), (6, 36), (6, 20), (6, 52), (6, 37), (6, 54), (6, 24), (6, 9), (6, 57), (6, 26), (6, 11), (6, 27), (6, 59), (6, 30), (6, 14), (6, 46), (6, 31), (6, 15), (7, 48), (7, 49), (7, 34), (7, 18), (7, 19), (7, 51), (7, 53), (7, 22), (7, 55), (7, 8), (7, 40), (7, 41), (7, 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(12, 58), (12, 60), (12, 44), (12, 61), (12, 13), (12, 29), (13, 32), (13, 48), (13, 17), (13, 49), (13, 18), (13, 50), (13, 36), (13, 20), (13, 52), (13, 37), (13, 21), (13, 22), (13, 55), (13, 24), (13, 25), (13, 57), (13, 27), (13, 59), (13, 28), (13, 45), (13, 30), (14, 32), (14, 33), (14, 18), (14, 50), (14, 53), (14, 23), (14, 40), (14, 24), (14, 56), (14, 26), (14, 58), (14, 43), (14, 27), (14, 61), (14, 45), (14, 30), (14, 46), (14, 15), (14, 47), (15, 48), (15, 33), (15, 17), (15, 18), (15, 35), (15, 51), (15, 20), (15, 37), (15, 38), (15, 54), (15, 39), (15, 55), (15, 56), (15, 25), (15, 57), (15, 42), (15, 58), (15, 28), (15, 61), (16, 32), (16, 48), (16, 34), (16, 18), (16, 21), (16, 22), (16, 56), (16, 25), (16, 57), (16, 26), (16, 60), (16, 28), (16, 46), (16, 47), (17, 33), (17, 49), (17, 19), (17, 51), (17, 36), (17, 21), (17, 53), (17, 41), (17, 25), (17, 57), (17, 26), (17, 27), (17, 59), (17, 60), (17, 28), (17, 61), (17, 45), (18, 33), (18, 49), (18, 35), (18, 19), 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b/vendor/petgraph/tests/graphmap.rs deleted file mode 100644 index 2b15a88d..00000000 --- a/vendor/petgraph/tests/graphmap.rs +++ /dev/null @@ -1,443 +0,0 @@ -#![cfg(feature = "graphmap")] -extern crate petgraph; - -use std::collections::HashSet; -use std::fmt; - -use petgraph::prelude::*; -use petgraph::visit::Walker; - -use petgraph::algo::dijkstra; - -use petgraph::dot::{Config, Dot}; - -#[test] -fn simple() { - //let root = TypedArena::<Node<_>>::new(); - let mut gr = UnGraphMap::new(); - //let node = |&: name: &'static str| Ptr(root.alloc(Node(name.to_string()))); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - gr.add_edge(a, b, 7); - gr.add_edge(a, c, 9); - gr.add_edge(a, d, 14); - gr.add_edge(b, c, 10); - gr.add_edge(c, d, 2); - gr.add_edge(d, e, 9); - gr.add_edge(b, f, 15); - gr.add_edge(c, f, 11); - - assert!(gr.add_edge(e, f, 5).is_none()); - - // duplicate edges - assert_eq!(gr.add_edge(f, b, 16), Some(15)); - assert_eq!(gr.add_edge(f, e, 6), Some(5)); - println!("{:?}", gr); - println!("{}", Dot::with_config(&gr, &[])); - - assert_eq!(gr.node_count(), 6); - assert_eq!(gr.edge_count(), 9); - - // check updated edge weight - assert_eq!(gr.edge_weight(e, f), Some(&6)); - let scores = dijkstra(&gr, a, None, |e| *e.weight()); - let mut scores: Vec<_> = scores.into_iter().collect(); - scores.sort(); - assert_eq!( - scores, - vec![ - ("A", 0), - ("B", 7), - ("C", 9), - ("D", 11), - ("E", 20), - ("F", 20) - ] - ); -} - -#[test] -fn edges_directed() { - let mut gr = DiGraphMap::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - gr.add_edge(a, b, 7); - gr.add_edge(a, c, 9); - gr.add_edge(a, d, 14); - gr.add_edge(b, c, 10); - gr.add_edge(c, d, 2); - gr.add_edge(d, e, 9); - gr.add_edge(b, f, 15); - gr.add_edge(c, f, 11); - - let mut edges_out = gr.edges_directed(c, Direction::Outgoing); - assert_eq!(edges_out.next(), Some((c, d, &2))); - assert_eq!(edges_out.next(), Some((c, f, &11))); - assert_eq!(edges_out.next(), None); - - let mut edges_in = gr.edges_directed(c, Direction::Incoming); - assert_eq!(edges_in.next(), Some((a, c, &9))); - assert_eq!(edges_in.next(), Some((b, c, &10))); - assert_eq!(edges_in.next(), None); -} - -#[test] -fn remov() { - let mut g = UnGraphMap::new(); - g.add_node(1); - g.add_node(2); - g.add_edge(1, 2, -1); - - assert_eq!(g.edge_weight(1, 2), Some(&-1)); - assert_eq!(g.edge_weight(2, 1), Some(&-1)); - assert_eq!(g.neighbors(1).count(), 1); - - let noexist = g.remove_edge(2, 3); - assert_eq!(noexist, None); - - let exist = g.remove_edge(2, 1); - assert_eq!(exist, Some(-1)); - assert_eq!(g.edge_count(), 0); - assert_eq!(g.edge_weight(1, 2), None); - assert_eq!(g.edge_weight(2, 1), None); - assert_eq!(g.neighbors(1).count(), 0); -} - -#[test] -fn remove_node() { - // From #431 - let mut graph = petgraph::graphmap::DiGraphMap::<u32, ()>::new(); - graph.add_edge(1, 2, ()); - graph.remove_node(2); - - let neighbors: Vec<u32> = graph.neighbors(1).collect(); - assert_eq!(neighbors, []); - - let edges: Vec<(u32, u32, _)> = graph.all_edges().collect(); - assert_eq!(edges, []); -} - -#[test] -fn remove_directed() { - let mut g = GraphMap::<_, _, Directed>::with_capacity(0, 0); - g.add_edge(1, 2, -1); - println!("{:?}", g); - - assert_eq!(g.edge_weight(1, 2), Some(&-1)); - assert_eq!(g.edge_weight(2, 1), None); - assert_eq!(g.neighbors(1).count(), 1); - - let noexist = g.remove_edge(2, 3); - assert_eq!(noexist, None); - - let exist = g.remove_edge(2, 1); - assert_eq!(exist, None); - let exist = g.remove_edge(1, 2); - assert_eq!(exist, Some(-1)); - println!("{:?}", g); - assert_eq!(g.edge_count(), 0); - assert_eq!(g.edge_weight(1, 2), None); - assert_eq!(g.edge_weight(2, 1), None); - assert_eq!(g.neighbors(1).count(), 0); -} - -#[test] -fn dfs() { - let mut gr = UnGraphMap::default(); - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - let k = gr.add_node("K"); - // Z is disconnected. - let z = gr.add_node("Z"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - gr.add_edge(i, k, 2.); - - println!("{:?}", gr); - - { - let mut cnt = 0; - let mut dfs = Dfs::new(&gr, h); - while dfs.next(&gr).is_some() { - cnt += 1; - } - assert_eq!(cnt, 4); - } - { - let mut cnt = 0; - let mut dfs = Dfs::new(&gr, z); - while dfs.next(&gr).is_some() { - cnt += 1; - } - assert_eq!(cnt, 1); - } - - assert_eq!(Dfs::new(&gr, h).iter(&gr).count(), 4); - assert_eq!(Dfs::new(&gr, i).iter(&gr).count(), 4); - assert_eq!(Dfs::new(&gr, z).iter(&gr).count(), 1); -} - -#[test] -fn edge_iterator() { - let mut gr = UnGraphMap::new(); - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - let k = gr.add_node("K"); - gr.add_edge(h, i, 1); - gr.add_edge(h, j, 2); - gr.add_edge(i, j, 3); - gr.add_edge(i, k, 4); - - let real_edges: HashSet<_> = gr.all_edges().map(|(a, b, &w)| (a, b, w)).collect(); - let expected_edges: HashSet<_> = - vec![("H", "I", 1), ("H", "J", 2), ("I", "J", 3), ("I", "K", 4)] - .into_iter() - .collect(); - - assert_eq!(real_edges, expected_edges); -} - -#[test] -fn from_edges() { - let gr = - GraphMap::<_, _, Undirected>::from_edges(&[("a", "b", 1), ("a", "c", 2), ("c", "d", 3)]); - assert_eq!(gr.node_count(), 4); - assert_eq!(gr.edge_count(), 3); - assert_eq!(gr[("a", "c")], 2); - - let gr = GraphMap::<_, (), Undirected>::from_edges(&[ - (0, 1), - (0, 2), - (0, 3), - (1, 2), - (1, 3), - (2, 3), - ]); - assert_eq!(gr.node_count(), 4); - assert_eq!(gr.edge_count(), 6); - assert_eq!(gr.neighbors(0).count(), 3); - assert_eq!(gr.neighbors(1).count(), 3); - assert_eq!(gr.neighbors(2).count(), 3); - assert_eq!(gr.neighbors(3).count(), 3); - - println!("{:?}", Dot::with_config(&gr, &[Config::EdgeNoLabel])); -} - -#[test] -fn graphmap_directed() { - //let root = TypedArena::<Node<_>>::new(); - let mut gr = DiGraphMap::<_, ()>::with_capacity(0, 0); - //let node = |&: name: &'static str| Ptr(root.alloc(Node(name.to_string()))); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let edges = [(a, b), (a, c), (a, d), (b, c), (c, d), (d, e), (b, b)]; - gr.extend(&edges); - - // Add reverse edges -- ok! - assert!(gr.add_edge(e, d, ()).is_none()); - // duplicate edge - no - assert!(gr.add_edge(a, b, ()).is_some()); - - // duplicate self loop - no - assert!(gr.add_edge(b, b, ()).is_some()); - println!("{:#?}", gr); -} - -fn assert_sccs_eq<N>(mut res: Vec<Vec<N>>, mut answer: Vec<Vec<N>>) -where - N: Ord + fmt::Debug, -{ - // normalize the result and compare with the answer. - for scc in &mut res { - scc.sort(); - } - res.sort(); - for scc in &mut answer { - scc.sort(); - } - answer.sort(); - assert_eq!(res, answer); -} - -#[test] -fn scc() { - let gr: GraphMap<_, u32, Directed> = GraphMap::from_edges(&[ - (6, 0, 0), - (0, 3, 1), - (3, 6, 2), - (8, 6, 3), - (8, 2, 4), - (2, 5, 5), - (5, 8, 6), - (7, 5, 7), - (1, 7, 8), - (7, 4, 9), - (4, 1, 10), - ]); - - assert_sccs_eq( - petgraph::algo::kosaraju_scc(&gr), - vec![vec![0, 3, 6], vec![1, 4, 7], vec![2, 5, 8]], - ); -} - -#[test] -fn test_into_graph() { - let gr: GraphMap<_, u32, Directed> = GraphMap::from_edges(&[ - (6, 0, 0), - (0, 3, 1), - (3, 6, 2), - (8, 6, 3), - (8, 2, 4), - (2, 5, 5), - (5, 8, 6), - (7, 5, 7), - (1, 7, 8), - (7, 4, 9), - (4, 1, 10), - ]); - - let graph: Graph<_, _, _> = gr.clone().into_graph(); - println!("{}", Dot::new(&gr)); - println!("{}", Dot::new(&graph)); - - // node weigths in `graph` are node identifiers in `gr`. - for edge in graph.edge_references() { - let a = edge.source(); - let b = edge.target(); - let aw = graph[a]; - let bw = graph[b]; - assert_eq!(&gr[(aw, bw)], edge.weight()); - } -} - -#[test] -fn test_from_graph() { - let mut gr: Graph<u32, u32, Directed> = Graph::new(); - let node_a = gr.add_node(12); - let node_b = gr.add_node(13); - let node_c = gr.add_node(14); - gr.add_edge(node_a, node_b, 1000); - gr.add_edge(node_b, node_c, 999); - gr.add_edge(node_c, node_a, 1111); - gr.add_node(42); - let gr = gr; - - let graph: GraphMap<u32, u32, Directed> = GraphMap::from_graph(gr.clone()); - println!("{}", Dot::new(&gr)); - println!("{}", Dot::new(&graph)); - - assert!(petgraph::algo::is_isomorphic(&gr, &graph)); - assert_eq!(graph[(12, 13)], 1000); -} - -#[test] -fn test_all_edges_mut() { - // graph with edge weights equal to in+out - let mut graph: GraphMap<_, u32, Directed> = - GraphMap::from_edges(&[(0, 1, 1), (1, 2, 3), (2, 0, 2)]); - - // change it so edge weight is equal to 2 * (in+out) - for (start, end, weight) in graph.all_edges_mut() { - *weight = (start + end) * 2; - } - - // test it - for (start, end, weight) in graph.all_edges() { - assert_eq!((start + end) * 2, *weight); - } -} - -#[test] -fn neighbors_incoming_includes_self_loops() { - let mut graph = DiGraphMap::new(); - - graph.add_node(()); - graph.add_edge((), (), ()); - - let mut neighbors = graph.neighbors_directed((), Incoming); - assert_eq!(neighbors.next(), Some(())); - assert_eq!(neighbors.next(), None); -} - -#[test] -fn undirected_neighbors_includes_self_loops() { - let mut graph = UnGraphMap::new(); - - graph.add_node(()); - graph.add_edge((), (), ()); - - let mut neighbors = graph.neighbors(()); - assert_eq!(neighbors.next(), Some(())); - assert_eq!(neighbors.next(), None); -} - -#[test] -fn self_loops_can_be_removed() { - let mut graph = DiGraphMap::new(); - - graph.add_node(()); - graph.add_edge((), (), ()); - - graph.remove_edge((), ()); - - assert_eq!(graph.neighbors_directed((), Outgoing).next(), None); - assert_eq!(graph.neighbors_directed((), Incoming).next(), None); -} - -#[test] -#[cfg(feature = "rayon")] -fn test_parallel_iterator() { - use rayon::prelude::*; - let mut gr: DiGraphMap<u32, u32> = DiGraphMap::new(); - - for i in 0..1000 { - gr.add_node(i); - } - - let serial_sum: u32 = gr.nodes().sum(); - let parallel_sum: u32 = gr.par_nodes().sum(); - assert_eq!(serial_sum, parallel_sum); - - gr.par_nodes() - .enumerate() - .for_each(|(i, n)| assert_eq!(i as u32, n)); - - for i in 0..1000 { - gr.add_edge(i / 2, i, i + i / 2); - } - - let serial_sum: u32 = gr.all_edges().map(|(.., &e)| e).sum(); - let parallel_sum: u32 = gr.par_all_edges().map(|(.., &e)| e).sum(); - assert_eq!(serial_sum, parallel_sum); - - gr.par_all_edges_mut().for_each(|(n1, n2, e)| *e -= n1 + n2); - gr.all_edges().for_each(|(.., &e)| assert_eq!(e, 0)); -} - -#[test] -fn test_alternative_hasher() { - let mut gr: GraphMap<&str, u32, Directed, fxhash::FxBuildHasher> = GraphMap::new(); - gr.add_node("abc"); - gr.add_node("def"); - gr.add_node("ghi"); - - gr.add_edge("abc", "def", 1); - - assert!(gr.contains_edge("abc", "def")); - assert!(!gr.contains_edge("abc", "ghi")); -} diff --git a/vendor/petgraph/tests/iso.rs b/vendor/petgraph/tests/iso.rs deleted file mode 100644 index 5bec797a..00000000 --- a/vendor/petgraph/tests/iso.rs +++ /dev/null @@ -1,638 +0,0 @@ -extern crate petgraph; - -use std::collections::HashSet; -use std::fs::File; -use std::io::prelude::*; - -use petgraph::graph::{edge_index, node_index}; -use petgraph::prelude::*; -use petgraph::EdgeType; - -use petgraph::algo::{ - is_isomorphic, is_isomorphic_matching, is_isomorphic_subgraph, subgraph_isomorphisms_iter, -}; - -/// Petersen A and B are isomorphic -/// -/// http://www.dharwadker.org/tevet/isomorphism/ -const PETERSEN_A: &str = " - 0 1 0 0 1 0 1 0 0 0 - 1 0 1 0 0 0 0 1 0 0 - 0 1 0 1 0 0 0 0 1 0 - 0 0 1 0 1 0 0 0 0 1 - 1 0 0 1 0 1 0 0 0 0 - 0 0 0 0 1 0 0 1 1 0 - 1 0 0 0 0 0 0 0 1 1 - 0 1 0 0 0 1 0 0 0 1 - 0 0 1 0 0 1 1 0 0 0 - 0 0 0 1 0 0 1 1 0 0 -"; - -const PETERSEN_B: &str = " - 0 0 0 1 0 1 0 0 0 1 - 0 0 0 1 1 0 1 0 0 0 - 0 0 0 0 0 0 1 1 0 1 - 1 1 0 0 0 0 0 1 0 0 - 0 1 0 0 0 0 0 0 1 1 - 1 0 0 0 0 0 1 0 1 0 - 0 1 1 0 0 1 0 0 0 0 - 0 0 1 1 0 0 0 0 1 0 - 0 0 0 0 1 1 0 1 0 0 - 1 0 1 0 1 0 0 0 0 0 -"; - -/// An almost full set, isomorphic -const FULL_A: &str = " - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 0 1 1 1 0 1 - 1 1 1 1 1 1 1 1 1 1 -"; - -const FULL_B: &str = " - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 0 1 1 1 0 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 1 -"; - -/// Praust A and B are not isomorphic -const PRAUST_A: &str = " - 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 - 1 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 - 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 - 0 1 0 0 1 0 1 1 0 0 0 0 0 1 0 0 0 0 0 0 - 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 - 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 - 0 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 0 0 - 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 1 - 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 1 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 1 1 0 0 0 - 0 0 0 0 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 1 - 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 1 0 - 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 1 1 1 - 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 1 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 1 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 1 0 -"; - -const PRAUST_B: &str = " - 0 1 1 1 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 1 0 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 1 1 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 - 1 1 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 - 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 0 0 0 - 0 1 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 1 - 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 - 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 - 0 1 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 0 - 0 0 1 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 1 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 0 0 1 0 1 - 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 1 1 0 1 0 - 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 1 0 1 - 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 1 0 - 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 1 0 - 0 0 0 0 0 0 0 1 0 0 0 0 1 0 1 0 1 0 0 1 - 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 1 1 0 0 1 - 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 1 1 0 -"; - -const G1U: &str = " -0 1 1 0 1 -1 0 1 0 0 -1 1 0 0 0 -0 0 0 0 0 -1 0 0 0 0 -"; - -const G2U: &str = " -0 1 0 1 0 -1 0 0 1 1 -0 0 0 0 0 -1 1 0 0 0 -0 1 0 0 0 -"; - -const G4U: &str = " -0 1 1 0 1 -1 0 0 1 0 -1 0 0 0 0 -0 1 0 0 0 -1 0 0 0 0 -"; - -const G1D: &str = " -0 1 1 0 1 -0 0 1 0 0 -0 0 0 0 0 -0 0 0 0 0 -0 0 0 0 0 -"; - -const G4D: &str = " -0 1 1 0 1 -0 0 0 1 0 -0 0 0 0 0 -0 0 0 0 0 -0 0 0 0 0 -"; - -// G8 1,2 are not iso -const G8_1: &str = " -0 1 1 0 0 1 1 1 -1 0 1 0 1 0 1 1 -1 1 0 1 0 0 1 1 -0 0 1 0 1 1 1 1 -0 1 0 1 0 1 1 1 -1 0 0 1 1 0 1 1 -1 1 1 1 1 1 0 1 -1 1 1 1 1 1 1 0 -"; - -const G8_2: &str = " -0 1 0 1 0 1 1 1 -1 0 1 0 1 0 1 1 -0 1 0 1 0 1 1 1 -1 0 1 0 1 0 1 1 -0 1 0 1 0 1 1 1 -1 0 1 0 1 0 1 1 -1 1 1 1 1 1 0 1 -1 1 1 1 1 1 1 0 -"; - -// G3 1,2 are not iso -const G3_1: &str = " -0 1 0 -1 0 1 -0 1 0 -"; -const G3_2: &str = " -0 1 1 -1 0 1 -1 1 0 -"; - -// Non-isomorphic due to selfloop difference -const S1: &str = " -1 1 1 -1 0 1 -1 0 0 -"; -const S2: &str = " -1 1 1 -0 1 1 -1 0 0 -"; - -/// Parse a text adjacency matrix format into a directed graph -fn parse_graph<Ty: EdgeType>(s: &str) -> Graph<(), (), Ty> { - let mut gr = Graph::with_capacity(0, 0); - let s = s.trim(); - let lines = s.lines().filter(|l| !l.is_empty()); - for (row, line) in lines.enumerate() { - for (col, word) in line.split(' ').filter(|s| !s.is_empty()).enumerate() { - let has_edge = word.parse::<i32>().unwrap(); - assert!(has_edge == 0 || has_edge == 1); - if has_edge == 0 { - continue; - } - while col >= gr.node_count() || row >= gr.node_count() { - gr.add_node(()); - } - gr.update_edge(node_index(row), node_index(col), ()); - } - } - gr -} - -fn str_to_graph(s: &str) -> Graph<(), (), Undirected> { - parse_graph(s) -} - -fn str_to_digraph(s: &str) -> Graph<(), (), Directed> { - parse_graph(s) -} - -/// Parse a file in adjacency matrix format into a directed graph -fn graph_from_file(path: &str) -> Graph<(), (), Directed> { - let mut f = File::open(path).expect("file not found"); - let mut contents = String::new(); - f.read_to_string(&mut contents) - .expect("failed to read from file"); - parse_graph(&contents) -} - -/* -fn graph_to_ad_matrix<N, E, Ty: EdgeType>(g: &Graph<N,E,Ty>) -{ - let n = g.node_count(); - for i in (0..n) { - for j in (0..n) { - let ix = NodeIndex::new(i); - let jx = NodeIndex::new(j); - let out = match g.find_edge(ix, jx) { - None => "0", - Some(_) => "1", - }; - print!("{} ", out); - } - println!(""); - } -} -*/ - -#[test] -fn petersen_iso() { - // The correct isomorphism is - // 0 => 0, 1 => 3, 2 => 1, 3 => 4, 5 => 2, 6 => 5, 7 => 7, 8 => 6, 9 => 8, 4 => 9 - let peta = str_to_digraph(PETERSEN_A); - let petb = str_to_digraph(PETERSEN_B); - /* - println!("{:?}", peta); - graph_to_ad_matrix(&peta); - println!(""); - graph_to_ad_matrix(&petb); - */ - - assert!(petgraph::algo::is_isomorphic(&peta, &petb)); -} - -#[test] -fn petersen_undir_iso() { - // The correct isomorphism is - // 0 => 0, 1 => 3, 2 => 1, 3 => 4, 5 => 2, 6 => 5, 7 => 7, 8 => 6, 9 => 8, 4 => 9 - let peta = str_to_digraph(PETERSEN_A); - let petb = str_to_digraph(PETERSEN_B); - - assert!(petgraph::algo::is_isomorphic(&peta, &petb)); -} - -#[test] -fn full_iso() { - let a = str_to_graph(FULL_A); - let b = str_to_graph(FULL_B); - - assert!(petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -#[cfg_attr(miri, ignore = "Takes too long to run in Miri")] -fn praust_dir_no_iso() { - let a = str_to_digraph(PRAUST_A); - let b = str_to_digraph(PRAUST_B); - - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -#[cfg_attr(miri, ignore = "Takes too long to run in Miri")] -fn praust_undir_no_iso() { - let a = str_to_graph(PRAUST_A); - let b = str_to_graph(PRAUST_B); - - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn coxeter_di_iso() { - // The correct isomorphism is - let a = str_to_digraph(COXETER_A); - let b = str_to_digraph(COXETER_B); - assert!(petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn coxeter_undi_iso() { - // The correct isomorphism is - let a = str_to_graph(COXETER_A); - let b = str_to_graph(COXETER_B); - assert!(petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn g14_dir_not_iso() { - let a = str_to_digraph(G1D); - let b = str_to_digraph(G4D); - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn g14_undir_not_iso() { - let a = str_to_digraph(G1U); - let b = str_to_digraph(G4U); - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn g12_undir_iso() { - let a = str_to_digraph(G1U); - let b = str_to_digraph(G2U); - assert!(petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn g3_not_iso() { - let a = str_to_digraph(G3_1); - let b = str_to_digraph(G3_2); - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn g8_not_iso() { - let a = str_to_digraph(G8_1); - let b = str_to_digraph(G8_2); - assert_eq!(a.edge_count(), b.edge_count()); - assert_eq!(a.node_count(), b.node_count()); - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn s12_not_iso() { - let a = str_to_digraph(S1); - let b = str_to_digraph(S2); - assert_eq!(a.edge_count(), b.edge_count()); - assert_eq!(a.node_count(), b.node_count()); - assert!(!petgraph::algo::is_isomorphic(&a, &b)); -} - -#[test] -fn iso1() { - let mut g0 = Graph::<_, ()>::new(); - let mut g1 = Graph::<_, ()>::new(); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - - // very simple cases - let a0 = g0.add_node(0); - let a1 = g1.add_node(0); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - let b0 = g0.add_node(1); - let b1 = g1.add_node(1); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - let _ = g0.add_node(2); - assert!(!petgraph::algo::is_isomorphic(&g0, &g1)); - let _ = g1.add_node(2); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - g0.add_edge(a0, b0, ()); - assert!(!petgraph::algo::is_isomorphic(&g0, &g1)); - g1.add_edge(a1, b1, ()); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); -} - -#[test] -fn iso2() { - let mut g0 = Graph::<_, ()>::new(); - let mut g1 = Graph::<_, ()>::new(); - - let a0 = g0.add_node(0); - let a1 = g1.add_node(0); - let b0 = g0.add_node(1); - let b1 = g1.add_node(1); - let c0 = g0.add_node(2); - let c1 = g1.add_node(2); - g0.add_edge(a0, b0, ()); - g1.add_edge(c1, b1, ()); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - // a -> b - // a -> c - // vs. - // c -> b - // c -> a - g0.add_edge(a0, c0, ()); - g1.add_edge(c1, a1, ()); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - - // add - // b -> c - // vs - // b -> a - - let _ = g0.add_edge(b0, c0, ()); - let _ = g1.add_edge(b1, a1, ()); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - let d0 = g0.add_node(3); - let d1 = g1.add_node(3); - let e0 = g0.add_node(4); - let e1 = g1.add_node(4); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); - // add - // b -> e -> d - // vs - // b -> d -> e - g0.add_edge(b0, e0, ()); - g0.add_edge(e0, d0, ()); - g1.add_edge(b1, d1, ()); - g1.add_edge(d1, e1, ()); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); -} - -#[test] -fn iso_matching() { - let g0 = Graph::<(), _>::from_edges(&[(0, 0, 1), (0, 1, 2), (0, 2, 3), (1, 2, 4)]); - - let mut g1 = g0.clone(); - g1[edge_index(0)] = 0; - assert!(!is_isomorphic_matching( - &g0, - &g1, - |x, y| x == y, - |x, y| x == y - )); - let mut g2 = g0.clone(); - g2[edge_index(1)] = 0; - assert!(!is_isomorphic_matching( - &g0, - &g2, - |x, y| x == y, - |x, y| x == y - )); -} - -#[test] -fn iso_100n_100e() { - let g0 = str_to_digraph(include_str!("res/graph_100n_100e.txt")); - let g1 = str_to_digraph(include_str!("res/graph_100n_100e_iso.txt")); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); -} - -#[test] -#[cfg_attr(miri, ignore = "Too large for Miri")] -fn iso_large() { - let g0 = graph_from_file("tests/res/graph_1000n_1000e.txt"); - let g1 = graph_from_file("tests/res/graph_1000n_1000e.txt"); - assert!(petgraph::algo::is_isomorphic(&g0, &g1)); -} - -// isomorphism isn't correct for multigraphs. -// Keep this testcase to document how -#[should_panic] -#[test] -fn iso_multigraph_failure() { - let g0 = Graph::<(), ()>::from_edges(&[(0, 0), (0, 0), (0, 1), (1, 1), (1, 1), (1, 0)]); - - let g1 = Graph::<(), ()>::from_edges(&[(0, 0), (0, 1), (0, 1), (1, 1), (1, 0), (1, 0)]); - assert!(!is_isomorphic(&g0, &g1)); -} - -#[test] -#[cfg_attr(miri, ignore = "Takes too long to run in Miri")] -fn iso_subgraph() { - let g0 = Graph::<(), ()>::from_edges(&[(0, 1), (1, 2), (2, 0)]); - let g1 = Graph::<(), ()>::from_edges(&[(0, 1), (1, 2), (2, 0), (2, 3), (0, 4)]); - assert!(!is_isomorphic(&g0, &g1)); - assert!(is_isomorphic_subgraph(&g0, &g1)); -} - -#[test] -#[cfg_attr(miri, ignore = "Takes too long to run in Miri")] -fn iter_subgraph() { - let a = Graph::<(), ()>::from_edges(&[(0, 1), (1, 2), (2, 0)]); - let b = Graph::<(), ()>::from_edges(&[(0, 1), (1, 2), (2, 0), (2, 3), (0, 4)]); - let a_ref = &a; - let b_ref = &b; - let mut node_match = { |x: &(), y: &()| x == y }; - let mut edge_match = { |x: &(), y: &()| x == y }; - - let mappings = - subgraph_isomorphisms_iter(&a_ref, &b_ref, &mut node_match, &mut edge_match).unwrap(); - - // Verify the iterator returns the expected mappings - let expected_mappings: Vec<Vec<usize>> = vec![vec![0, 1, 2], vec![1, 2, 0], vec![2, 0, 1]]; - for mapping in mappings { - assert!(expected_mappings.contains(&mapping)) - } - - // Verify all the mappings from the iterator are different - let a = str_to_digraph(COXETER_A); - let b = str_to_digraph(COXETER_B); - let a_ref = &a; - let b_ref = &b; - - let mut unique = HashSet::new(); - assert!( - subgraph_isomorphisms_iter(&a_ref, &b_ref, &mut node_match, &mut edge_match) - .unwrap() - .all(|x| unique.insert(x)) - ); - - // The iterator should return None for graphs that are not isomorphic - let a = str_to_digraph(G8_1); - let b = str_to_digraph(G8_2); - let a_ref = &a; - let b_ref = &b; - - assert!( - subgraph_isomorphisms_iter(&a_ref, &b_ref, &mut node_match, &mut edge_match) - .unwrap() - .next() - .is_none() - ); - - // https://github.com/petgraph/petgraph/issues/534 - let mut g = Graph::<String, ()>::new(); - let e1 = g.add_node("l1".to_string()); - let e2 = g.add_node("l2".to_string()); - g.add_edge(e1, e2, ()); - let e3 = g.add_node("l3".to_string()); - g.add_edge(e2, e3, ()); - let e4 = g.add_node("l4".to_string()); - g.add_edge(e3, e4, ()); - - let mut sub = Graph::<String, ()>::new(); - let e3 = sub.add_node("l3".to_string()); - let e4 = sub.add_node("l4".to_string()); - sub.add_edge(e3, e4, ()); - - let mut node_match = { |x: &String, y: &String| x == y }; - let mut edge_match = { |x: &(), y: &()| x == y }; - assert_eq!( - subgraph_isomorphisms_iter(&&sub, &&g, &mut node_match, &mut edge_match) - .unwrap() - .collect::<Vec<_>>(), - vec![vec![2, 3]] - ); -} - -/// Isomorphic pair -const COXETER_A: &str = " - 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 - 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 - 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 - 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 - 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 - 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 1 - 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 - 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 - 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 - 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 - 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 -"; - -const COXETER_B: &str = " - 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 - 0 0 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 0 - 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 - 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 - 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 - 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 - 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 - 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 - 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 - 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 - 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 - 0 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 - 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 - 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 1 - 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 1 0 -"; diff --git a/vendor/petgraph/tests/k_shortest_path.rs b/vendor/petgraph/tests/k_shortest_path.rs deleted file mode 100644 index cd5b4fe9..00000000 --- a/vendor/petgraph/tests/k_shortest_path.rs +++ /dev/null @@ -1,63 +0,0 @@ -use petgraph::algo::k_shortest_path; -use petgraph::prelude::*; -use petgraph::Graph; -use std::collections::HashMap; - -#[test] -fn second_shortest_path() { - let mut graph: Graph<(), (), Directed> = Graph::new(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let d = graph.add_node(()); - let e = graph.add_node(()); - let f = graph.add_node(()); - let g = graph.add_node(()); - let h = graph.add_node(()); - let i = graph.add_node(()); - let j = graph.add_node(()); - let k = graph.add_node(()); - let l = graph.add_node(()); - let m = graph.add_node(()); - - graph.extend_with_edges(&[ - (a, b), - (b, c), - (c, d), - (b, f), - (f, g), - (c, g), - (g, h), - (d, e), - (e, h), - (h, i), - (h, j), - (h, k), - (h, l), - (i, m), - (l, k), - (j, k), - (j, m), - (k, m), - (l, m), - (m, e), - ]); - - let res = k_shortest_path(&graph, a, None, 2, |_| 1); - - let expected_res: HashMap<NodeIndex, usize> = [ - (e, 7), - (g, 3), - (h, 4), - (i, 5), - (j, 5), - (k, 5), - (l, 5), - (m, 6), - ] - .iter() - .cloned() - .collect(); - - assert_eq!(res, expected_res); -} diff --git a/vendor/petgraph/tests/list.rs b/vendor/petgraph/tests/list.rs deleted file mode 100644 index 4b8e2290..00000000 --- a/vendor/petgraph/tests/list.rs +++ /dev/null @@ -1,259 +0,0 @@ -extern crate itertools; -extern crate petgraph; -#[macro_use] -extern crate defmac; - -use petgraph::adj::DefaultIx; -use petgraph::adj::IndexType; -use petgraph::adj::{List, UnweightedList}; -use petgraph::algo::tarjan_scc; -use petgraph::data::{DataMap, DataMapMut}; -use petgraph::dot::Dot; -use petgraph::prelude::*; -use petgraph::visit::{ - IntoEdgeReferences, IntoEdges, IntoNeighbors, IntoNodeReferences, NodeCount, NodeIndexable, -}; - -use itertools::assert_equal; - -fn n(x: u32) -> DefaultIx { - DefaultIx::new(x as _) -} - -#[test] -fn node_indices() { - let mut g = List::<()>::new(); - let a = g.add_node(); - let b = g.add_node(); - let c = g.add_node(); - let mut iter = g.node_indices(); - assert_eq!(iter.next(), Some(a)); - assert_eq!(iter.next(), Some(b)); - assert_eq!(iter.next(), Some(c)); - assert_eq!(iter.next(), None); -} - -fn test_node_count<E>(g: &List<E>, n: usize) { - assert_eq!(n, g.node_count()); - assert_eq!(g.node_bound(), n); - assert_eq!(g.node_indices().count(), n); - assert_eq!(g.node_indices().len(), n); - assert_eq!(g.node_references().count(), n); - assert_eq!(g.node_references().len(), n); -} - -#[test] -fn node_bound() { - let mut g = List::<()>::new(); - test_node_count(&g, 0); - for i in 0..10 { - g.add_node(); - test_node_count(&g, i + 1); - } - g.clear(); - test_node_count(&g, 0); -} - -fn assert_sccs_eq<Ix: IndexType>(mut res: Vec<Vec<Ix>>, normalized: Vec<Vec<Ix>>) { - // normalize the result and compare with the answer. - for scc in &mut res { - scc.sort(); - } - // sort by minimum element - res.sort_by(|v, w| v[0].cmp(&w[0])); - assert_eq!(res, normalized); -} - -fn scc_graph() -> UnweightedList<DefaultIx> { - let mut gr = List::new(); - for _ in 0..9 { - gr.add_node(); - } - for (a, b) in &[ - (6, 0), - (0, 3), - (3, 6), - (8, 6), - (8, 2), - (2, 5), - (5, 8), - (7, 5), - (1, 7), - ] { - gr.add_edge(n(*a), n(*b), ()); - } - // make an identical replacement of n(4) and leave a hole - let x = gr.add_node(); - gr.add_edge(n(7), x, ()); - gr.add_edge(x, n(1), ()); - gr -} - -#[test] -fn test_tarjan_scc() { - let gr = scc_graph(); - - let x = n(gr.node_bound() as u32 - 1); - assert_sccs_eq( - tarjan_scc(&gr), - vec![ - vec![n(0), n(3), n(6)], - vec![n(1), n(7), x], - vec![n(2), n(5), n(8)], - vec![n(4)], - ], - ); -} - -fn make_graph() -> List<i32> { - let mut gr = List::new(); - let mut c = 0..; - let mut e = || -> i32 { c.next().unwrap() }; - for _ in 0..=9 { - gr.add_node(); - } - for &(from, to) in &[ - (6, 0), - (0, 3), - (3, 6), - (8, 6), - (8, 2), - (2, 5), - (5, 8), - (7, 5), - (1, 7), - (7, 9), - (8, 6), // parallel edge - (9, 1), - (9, 9), - (9, 9), - ] { - gr.add_edge(n(from), n(to), e()); - } - gr -} - -defmac!(edges ref gr, x => gr.edges(x).map(|r| (r.target(), *r.weight()))); - -#[test] -fn test_edges_directed() { - let gr = make_graph(); - dbg!(&gr); - let x = n(9); - assert_equal(edges!(&gr, x), vec![(1, 11), (x, 12), (x, 13)]); - assert_equal(edges!(&gr, n(0)), vec![(n(3), 1)]); - //assert_equal(edges!(&gr, n(4)), vec![]); -} - -#[test] -fn test_edge_references() { - let mut gr = make_graph(); - assert_eq!(gr.edge_count(), gr.edge_references().count()); - for i in gr.edge_references() { - assert_eq!(gr.edge_endpoints(i.id()), Some((i.source(), i.target()))); - assert_eq!(gr.edge_weight(i.id()), Some(i.weight())); - } - for n in gr.node_indices() { - for e in gr.edge_indices_from(n) { - match gr.edge_weight_mut(e) { - None => {} - Some(r) => { - *r = 1; - } - } - } - } - for i in gr.edge_references() { - assert_eq!(*i.weight(), 1); - } -} - -#[test] -fn test_edge_iterators() { - let gr = make_graph(); - for i in gr.node_indices() { - itertools::assert_equal( - gr.neighbors(n(i)), - gr.edges(n(i)).map(|r| { - assert_eq!(r.source(), n(i)); - r.target() - }), - ); - } -} - -#[test] -#[should_panic(expected = "is not a valid node")] -fn add_edge_vacant() { - let mut g = List::new(); - let a: DefaultIx = g.add_node(); - let b = g.add_node(); - let _ = g.add_node(); - g.clear(); - g.add_edge(a, b, 1); -} - -#[test] -#[should_panic(expected = "is not a valid node")] -fn add_edge_oob() { - let mut g = List::new(); - let a = g.add_node(); - let _ = g.add_node(); - let _ = g.add_node(); - g.add_edge(a, n(4), 1); -} - -#[test] -#[should_panic(expected = "index out of bounds")] -fn add_edge_oob_2() { - let mut g = List::new(); - let a = g.add_node(); - let _ = g.add_node(); - let _ = g.add_node(); - g.add_edge(n(4), a, 1); -} - -#[test] -fn test_node_references() { - let gr = scc_graph(); - - itertools::assert_equal(gr.node_references(), gr.node_indices()); -} - -#[test] -fn iterators_undir() { - let mut g = List::with_capacity(2); - let a = g.add_node(); - let b = g.add_node(); - let c = g.add_node(); - let d = g.add_node(); - for &(from, to, w) in &[(a, b, 1), (a, c, 2), (b, c, 3), (c, c, 4), (a, d, 5)] { - g.add_edge(n(from), n(to), w); - } - - itertools::assert_equal(g.neighbors(a), vec![b, c, d]); - itertools::assert_equal(g.neighbors(c), vec![c]); - itertools::assert_equal(g.neighbors(d), vec![]); - - itertools::assert_equal(g.neighbors(b), vec![c]); -} - -#[test] -fn dot() { - let mut gr = List::new(); - let a: DefaultIx = gr.add_node(); - let b = gr.add_node(); - gr.add_edge(a, a, 10u8); - gr.add_edge(a, b, 20); - let dot_output = format!("{:?}", Dot::new(&gr)); - assert_eq!( - dot_output, - r#"digraph { - 0 [ label = "()" ] - 1 [ label = "()" ] - 0 -> 0 [ label = "10" ] - 0 -> 1 [ label = "20" ] -} -"# - ); -} diff --git a/vendor/petgraph/tests/matching.rs b/vendor/petgraph/tests/matching.rs deleted file mode 100644 index 963c214f..00000000 --- a/vendor/petgraph/tests/matching.rs +++ /dev/null @@ -1,141 +0,0 @@ -use std::collections::HashSet; -use std::hash::Hash; - -use petgraph::algo::{greedy_matching, maximum_matching}; -use petgraph::prelude::*; - -macro_rules! assert_one_of { - ($actual:expr, [$($expected:expr),+]) => { - let expected = &[$($expected),+]; - if !expected.iter().any(|expected| expected == &$actual) { - let expected = expected.iter().map(|e| format!("\n{:?}", e)).collect::<Vec<_>>(); - let comma_separated = expected.join(", "); - panic!("assertion failed: `actual does not equal to any of expected`\nactual:\n{:?}\nexpected:{}", $actual, comma_separated); - } - }; -} - -macro_rules! set { - () => { - HashSet::new() - }; - ($(($source:expr, $target:expr)),+) => { - { - let mut set = HashSet::new(); - $( - set.insert(($source.into(), $target.into())); - )* - set - } - }; - ($($elem:expr),+) => { - { - let mut set = HashSet::new(); - $( - set.insert($elem.into()); - )* - set - } - }; -} - -// So we don't have to type `.collect::<HashSet<_>>`. -fn collect<'a, T: Copy + Eq + Hash + 'a>(iter: impl Iterator<Item = T>) -> HashSet<T> { - iter.collect() -} - -#[test] -fn greedy_empty() { - let g: UnGraph<(), ()> = UnGraph::default(); - let m = greedy_matching(&g); - assert_eq!(collect(m.edges()), set![]); - assert_eq!(collect(m.nodes()), set![]); -} - -#[test] -fn greedy_disjoint() { - let g: UnGraph<(), ()> = UnGraph::from_edges(&[(0, 1), (2, 3)]); - let m = greedy_matching(&g); - assert_eq!(collect(m.edges()), set![(0, 1), (2, 3)]); - assert_eq!(collect(m.nodes()), set![0, 1, 2, 3]); -} - -#[test] -fn greedy_odd_path() { - let g: UnGraph<(), ()> = UnGraph::from_edges(&[(0, 1), (1, 2), (2, 3)]); - let m = greedy_matching(&g); - assert_one_of!(collect(m.edges()), [set![(0, 1), (2, 3)], set![(1, 2)]]); - assert_one_of!(collect(m.nodes()), [set![0, 1, 2, 3], set![1, 2]]); -} - -#[test] -fn greedy_star() { - let g: UnGraph<(), ()> = UnGraph::from_edges(&[(0, 1), (0, 2), (0, 3)]); - let m = greedy_matching(&g); - assert_one_of!( - collect(m.edges()), - [set![(0, 1)], set![(0, 2)], set![(0, 3)]] - ); - assert_one_of!(collect(m.nodes()), [set![0, 1], set![0, 2], set![0, 3]]); -} - -#[test] -fn maximum_empty() { - let g: UnGraph<(), ()> = UnGraph::default(); - let m = maximum_matching(&g); - assert_eq!(collect(m.edges()), set![]); - assert_eq!(collect(m.nodes()), set![]); -} - -#[test] -fn maximum_disjoint() { - let g: UnGraph<(), ()> = UnGraph::from_edges(&[(0, 1), (2, 3)]); - let m = maximum_matching(&g); - assert_eq!(collect(m.edges()), set![(0, 1), (2, 3)]); - assert_eq!(collect(m.nodes()), set![0, 1, 2, 3]); -} - -#[test] -fn maximum_odd_path() { - let g: UnGraph<(), ()> = UnGraph::from_edges(&[(0, 1), (1, 2), (2, 3)]); - let m = maximum_matching(&g); - assert_eq!(collect(m.edges()), set![(0, 1), (2, 3)]); - assert_eq!(collect(m.nodes()), set![0, 1, 2, 3]); -} - -#[cfg(feature = "stable_graph")] -#[test] -fn maximum_in_stable_graph() { - let mut g: StableUnGraph<(), ()> = - StableUnGraph::from_edges(&[(0, 1), (0, 2), (1, 2), (1, 3), (2, 4), (3, 4), (3, 5)]); - - // Create a hole by removing node that would otherwise belong to the maximum - // matching. - g.remove_node(NodeIndex::new(4)); - - let m = maximum_matching(&g); - assert_one_of!( - collect(m.edges()), - [ - set![(0, 1), (3, 5)], - set![(0, 2), (1, 3)], - set![(0, 2), (3, 5)] - ] - ); - assert_one_of!( - collect(m.nodes()), - [set![0, 1, 3, 5], set![0, 2, 1, 3], set![0, 2, 3, 5]] - ); -} - -#[cfg(feature = "stable_graph")] -#[test] -fn is_perfect_in_stable_graph() { - let mut g: StableUnGraph<(), ()> = StableUnGraph::from_edges(&[(0, 1), (1, 2), (2, 3)]); - g.remove_node(NodeIndex::new(0)); - g.remove_node(NodeIndex::new(1)); - - let m = maximum_matching(&g); - assert_eq!(m.len(), 1); - assert!(m.is_perfect()); -} diff --git a/vendor/petgraph/tests/min_spanning_tree.rs b/vendor/petgraph/tests/min_spanning_tree.rs deleted file mode 100644 index de2cf268..00000000 --- a/vendor/petgraph/tests/min_spanning_tree.rs +++ /dev/null @@ -1,59 +0,0 @@ -use petgraph::{algo::min_spanning_tree, dot::Dot, graph::UnGraph, Graph}; - -#[test] -fn mst() { - use petgraph::data::FromElements; - - let mut gr = Graph::<_, _>::new(); - let a = gr.add_node("A"); - let b = gr.add_node("B"); - let c = gr.add_node("C"); - let d = gr.add_node("D"); - let e = gr.add_node("E"); - let f = gr.add_node("F"); - let g = gr.add_node("G"); - gr.add_edge(a, b, 7.); - gr.add_edge(a, d, 5.); - gr.add_edge(d, b, 9.); - gr.add_edge(b, c, 8.); - gr.add_edge(b, e, 7.); - gr.add_edge(c, e, 5.); - gr.add_edge(d, e, 15.); - gr.add_edge(d, f, 6.); - gr.add_edge(f, e, 8.); - gr.add_edge(f, g, 11.); - gr.add_edge(e, g, 9.); - - // add a disjoint part - let h = gr.add_node("H"); - let i = gr.add_node("I"); - let j = gr.add_node("J"); - gr.add_edge(h, i, 1.); - gr.add_edge(h, j, 3.); - gr.add_edge(i, j, 1.); - - println!("{}", Dot::new(&gr)); - - let mst = UnGraph::from_elements(min_spanning_tree(&gr)); - - println!("{}", Dot::new(&mst)); - println!("{:?}", Dot::new(&mst)); - println!("MST is:\n{:#?}", mst); - assert!(mst.node_count() == gr.node_count()); - // |E| = |N| - 2 because there are two disconnected components. - assert!(mst.edge_count() == gr.node_count() - 2); - - // check the exact edges are there - assert!(mst.find_edge(a, b).is_some()); - assert!(mst.find_edge(a, d).is_some()); - assert!(mst.find_edge(b, e).is_some()); - assert!(mst.find_edge(e, c).is_some()); - assert!(mst.find_edge(e, g).is_some()); - assert!(mst.find_edge(d, f).is_some()); - - assert!(mst.find_edge(h, i).is_some()); - assert!(mst.find_edge(i, j).is_some()); - - assert!(mst.find_edge(d, b).is_none()); - assert!(mst.find_edge(b, c).is_none()); -} diff --git a/vendor/petgraph/tests/operator.rs b/vendor/petgraph/tests/operator.rs deleted file mode 100644 index 031d6d62..00000000 --- a/vendor/petgraph/tests/operator.rs +++ /dev/null @@ -1,40 +0,0 @@ -use petgraph::operator::complement; -use petgraph::prelude::*; -use petgraph::Graph; - -#[test] -fn test_complement() { - let mut graph: Graph<(), (), Directed> = Graph::new(); - let a = graph.add_node(()); - let b = graph.add_node(()); - let c = graph.add_node(()); - let d = graph.add_node(()); - - graph.extend_with_edges(&[(a, b), (b, c), (c, d)]); - let mut output: Graph<(), (), Directed> = Graph::new(); - - complement(&graph, &mut output, ()); - - let mut expected_res: Graph<(), (), Directed> = Graph::new(); - let a = expected_res.add_node(()); - let b = expected_res.add_node(()); - let c = expected_res.add_node(()); - let d = expected_res.add_node(()); - expected_res.extend_with_edges(&[ - (a, c), - (a, d), - (b, a), - (b, d), - (c, a), - (c, b), - (d, a), - (d, b), - (d, c), - ]); - - for x in graph.node_indices() { - for y in graph.node_indices() { - assert_eq!(output.contains_edge(x, y), expected_res.contains_edge(x, y)); - } - } -} diff --git a/vendor/petgraph/tests/page_rank.rs b/vendor/petgraph/tests/page_rank.rs deleted file mode 100644 index 224415eb..00000000 --- a/vendor/petgraph/tests/page_rank.rs +++ /dev/null @@ -1,83 +0,0 @@ -use petgraph::{algo::page_rank, Graph}; - -#[cfg(feature = "rayon")] -use petgraph::algo::page_rank::parallel_page_rank; - -fn graph_example() -> Graph<String, f32> { - // Taken and adapted from https://github.com/neo4j-labs/graph?tab=readme-ov-file#how-to-run-algorithms - let mut graph = Graph::<_, f32>::new(); - graph.add_node("A".to_owned()); - graph.add_node("B".to_owned()); - graph.add_node("C".to_owned()); - graph.add_node("D".to_owned()); - graph.add_node("E".to_owned()); - graph.add_node("F".to_owned()); - graph.add_node("G".to_owned()); - graph.add_node("H".to_owned()); - graph.add_node("I".to_owned()); - graph.add_node("J".to_owned()); - graph.add_node("K".to_owned()); - graph.add_node("L".to_owned()); - graph.add_node("M".to_owned()); - graph.extend_with_edges(&[ - (1, 2), // B->C - (2, 1), // C->B - (4, 0), // D->A - (4, 1), // D->B - (5, 4), // E->D - (5, 1), // E->B - (5, 6), // E->F - (6, 1), // F->B - (6, 5), // F->E - (7, 1), // G->B - (7, 5), // F->E - (8, 1), // G->B - (8, 5), // G->E - (9, 1), // H->B - (9, 5), // H->E - (10, 1), // I->B - (10, 5), // I->E - (11, 5), // J->B - (12, 5), // K->B - ]); - graph -} - -fn expected_ranks() -> Vec<f32> { - vec![ - 0.029228685, - 0.38176042, - 0.3410649, - 0.014170233, - 0.035662483, - 0.077429585, - 0.035662483, - 0.014170233, - 0.014170233, - 0.014170233, - 0.014170233, - 0.014170233, - 0.014170233, - ] -} - -#[test] -fn test_page_rank() { - let graph = graph_example(); - let output_ranks = page_rank(&graph, 0.85_f32, 100); - assert_eq!(expected_ranks(), output_ranks); -} - -#[test] -#[cfg(feature = "rayon")] - -fn test_par_page_rank() { - let graph = graph_example(); - let output_ranks = parallel_page_rank(&graph, 0.85_f32, 100, Some(1e-12)); - assert!(!expected_ranks() - .iter() - .zip(output_ranks) - .any(|(expected, computed)| ((expected - computed).abs() > 1e-6) - || computed.is_nan() - || expected.is_nan())); -} diff --git a/vendor/petgraph/tests/quickcheck.rs b/vendor/petgraph/tests/quickcheck.rs deleted file mode 100644 index 899e053e..00000000 --- a/vendor/petgraph/tests/quickcheck.rs +++ /dev/null @@ -1,1457 +0,0 @@ -#![cfg(feature = "quickcheck")] -#[macro_use] -extern crate quickcheck; -extern crate petgraph; -extern crate rand; -#[macro_use] -extern crate defmac; - -extern crate itertools; -extern crate odds; - -mod utils; - -use utils::{Small, Tournament}; - -use odds::prelude::*; -use std::collections::{BTreeSet, HashMap, HashSet}; -use std::hash::Hash; - -use itertools::assert_equal; -use itertools::cloned; -use quickcheck::{Arbitrary, Gen}; -use rand::Rng; - -use petgraph::algo::{ - bellman_ford, condensation, dijkstra, dsatur_coloring, find_negative_cycle, floyd_warshall, - ford_fulkerson, greedy_feedback_arc_set, greedy_matching, is_cyclic_directed, - is_cyclic_undirected, is_isomorphic, is_isomorphic_matching, k_shortest_path, kosaraju_scc, - maximum_matching, min_spanning_tree, page_rank, tarjan_scc, toposort, Matching, -}; -use petgraph::data::FromElements; -use petgraph::dot::{Config, Dot}; -use petgraph::graph::{edge_index, node_index, IndexType}; -use petgraph::graphmap::NodeTrait; -use petgraph::operator::complement; -use petgraph::prelude::*; -use petgraph::visit::{ - EdgeFiltered, EdgeIndexable, IntoEdgeReferences, IntoEdges, IntoNeighbors, IntoNodeIdentifiers, - IntoNodeReferences, NodeCount, NodeIndexable, Reversed, Topo, VisitMap, Visitable, -}; -use petgraph::EdgeType; - -fn mst_graph<N, E, Ty, Ix>(g: &Graph<N, E, Ty, Ix>) -> Graph<N, E, Undirected, Ix> -where - Ty: EdgeType, - Ix: IndexType, - N: Clone, - E: Clone + PartialOrd, -{ - Graph::from_elements(min_spanning_tree(&g)) -} - -use std::fmt; - -quickcheck! { - fn mst_directed(g: Small<Graph<(), u32>>) -> bool { - // filter out isolated nodes - let no_singles = g.filter_map( - |nx, w| g.neighbors_undirected(nx).next().map(|_| w), - |_, w| Some(w)); - for i in no_singles.node_indices() { - assert!(no_singles.neighbors_undirected(i).count() > 0); - } - assert_eq!(no_singles.edge_count(), g.edge_count()); - let mst = mst_graph(&no_singles); - assert!(!is_cyclic_undirected(&mst)); - true - } -} - -quickcheck! { - fn mst_undirected(g: Graph<(), u32, Undirected>) -> bool { - // filter out isolated nodes - let no_singles = g.filter_map( - |nx, w| g.neighbors_undirected(nx).next().map(|_| w), - |_, w| Some(w)); - for i in no_singles.node_indices() { - assert!(no_singles.neighbors_undirected(i).count() > 0); - } - assert_eq!(no_singles.edge_count(), g.edge_count()); - let mst = mst_graph(&no_singles); - assert!(!is_cyclic_undirected(&mst)); - true - } -} - -quickcheck! { - fn reverse_undirected(g: Small<UnGraph<(), ()>>) -> bool { - let mut h = (*g).clone(); - h.reverse(); - is_isomorphic(&*g, &h) - } -} - -fn assert_graph_consistent<N, E, Ty, Ix>(g: &Graph<N, E, Ty, Ix>) -where - Ty: EdgeType, - Ix: IndexType, -{ - assert_eq!(g.node_count(), g.node_indices().count()); - assert_eq!(g.edge_count(), g.edge_indices().count()); - for edge in g.raw_edges() { - assert!( - g.find_edge(edge.source(), edge.target()).is_some(), - "Edge not in graph! {:?} to {:?}", - edge.source(), - edge.target() - ); - } -} - -#[test] -fn reverse_directed() { - fn prop<Ty: EdgeType>(mut g: Graph<(), (), Ty>) -> bool { - let node_outdegrees = g - .node_indices() - .map(|i| g.neighbors_directed(i, Outgoing).count()) - .collect::<Vec<_>>(); - let node_indegrees = g - .node_indices() - .map(|i| g.neighbors_directed(i, Incoming).count()) - .collect::<Vec<_>>(); - - g.reverse(); - let new_outdegrees = g - .node_indices() - .map(|i| g.neighbors_directed(i, Outgoing).count()) - .collect::<Vec<_>>(); - let new_indegrees = g - .node_indices() - .map(|i| g.neighbors_directed(i, Incoming).count()) - .collect::<Vec<_>>(); - assert_eq!(node_outdegrees, new_indegrees); - assert_eq!(node_indegrees, new_outdegrees); - assert_graph_consistent(&g); - true - } - quickcheck::quickcheck(prop as fn(Graph<_, _, Directed>) -> bool); -} - -#[test] -fn graph_retain_nodes() { - fn prop<Ty: EdgeType>(mut g: Graph<i32, i32, Ty>) -> bool { - // Remove all negative nodes, these should be randomly spread - let og = g.clone(); - let nodes = g.node_count(); - let num_negs = g.raw_nodes().iter().filter(|n| n.weight < 0).count(); - let mut removed = 0; - g.retain_nodes(|g, i| { - let keep = g[i] >= 0; - if !keep { - removed += 1; - } - keep - }); - let num_negs_post = g.raw_nodes().iter().filter(|n| n.weight < 0).count(); - let num_pos_post = g.raw_nodes().iter().filter(|n| n.weight >= 0).count(); - assert_eq!(num_negs_post, 0); - assert_eq!(removed, num_negs); - assert_eq!(num_negs + g.node_count(), nodes); - assert_eq!(num_pos_post, g.node_count()); - - // check against filter_map - let filtered = og.filter_map( - |_, w| if *w >= 0 { Some(*w) } else { None }, - |_, w| Some(*w), - ); - assert_eq!(g.node_count(), filtered.node_count()); - /* - println!("Iso of graph with nodes={}, edges={}", - g.node_count(), g.edge_count()); - */ - assert!(is_isomorphic_matching( - &filtered, - &g, - PartialEq::eq, - PartialEq::eq - )); - - true - } - quickcheck::quickcheck(prop as fn(Graph<_, _, Directed>) -> bool); - quickcheck::quickcheck(prop as fn(Graph<_, _, Undirected>) -> bool); -} - -#[test] -fn graph_retain_edges() { - fn prop<Ty: EdgeType>(mut g: Graph<(), i32, Ty>) -> bool { - // Remove all negative edges, these should be randomly spread - let og = g.clone(); - let edges = g.edge_count(); - let num_negs = g.raw_edges().iter().filter(|n| n.weight < 0).count(); - let mut removed = 0; - g.retain_edges(|g, i| { - let keep = g[i] >= 0; - if !keep { - removed += 1; - } - keep - }); - let num_negs_post = g.raw_edges().iter().filter(|n| n.weight < 0).count(); - let num_pos_post = g.raw_edges().iter().filter(|n| n.weight >= 0).count(); - assert_eq!(num_negs_post, 0); - assert_eq!(removed, num_negs); - assert_eq!(num_negs + g.edge_count(), edges); - assert_eq!(num_pos_post, g.edge_count()); - if og.edge_count() < 30 { - // check against filter_map - let filtered = og.filter_map( - |_, w| Some(*w), - |_, w| if *w >= 0 { Some(*w) } else { None }, - ); - assert_eq!(g.node_count(), filtered.node_count()); - assert!(is_isomorphic(&filtered, &g)); - } - true - } - quickcheck::quickcheck(prop as fn(Graph<_, _, Directed>) -> bool); - quickcheck::quickcheck(prop as fn(Graph<_, _, Undirected>) -> bool); -} - -#[test] -fn stable_graph_retain_edges() { - fn prop<Ty: EdgeType>(mut g: StableGraph<(), i32, Ty>) -> bool { - // Remove all negative edges, these should be randomly spread - let og = g.clone(); - let edges = g.edge_count(); - let num_negs = g.edge_references().filter(|n| *n.weight() < 0).count(); - let mut removed = 0; - g.retain_edges(|g, i| { - let keep = g[i] >= 0; - if !keep { - removed += 1; - } - keep - }); - let num_negs_post = g.edge_references().filter(|n| *n.weight() < 0).count(); - let num_pos_post = g.edge_references().filter(|n| *n.weight() >= 0).count(); - assert_eq!(num_negs_post, 0); - assert_eq!(removed, num_negs); - assert_eq!(num_negs + g.edge_count(), edges); - assert_eq!(num_pos_post, g.edge_count()); - if og.edge_count() < 30 { - // check against filter_map - let filtered = og.filter_map( - |_, w| Some(*w), - |_, w| if *w >= 0 { Some(*w) } else { None }, - ); - assert_eq!(g.node_count(), filtered.node_count()); - } - true - } - quickcheck::quickcheck(prop as fn(StableGraph<_, _, Directed>) -> bool); - quickcheck::quickcheck(prop as fn(StableGraph<_, _, Undirected>) -> bool); -} - -#[test] -fn isomorphism_1() { - // using small weights so that duplicates are likely - fn prop<Ty: EdgeType>(g: Small<Graph<i8, i8, Ty>>) -> bool { - let mut rng = rand::thread_rng(); - // several trials of different isomorphisms of the same graph - // mapping of node indices - let mut map = g.node_indices().collect::<Vec<_>>(); - let mut ng = Graph::<_, _, Ty>::with_capacity(g.node_count(), g.edge_count()); - for _ in 0..1 { - rng.shuffle(&mut map); - ng.clear(); - - for _ in g.node_indices() { - ng.add_node(0); - } - // Assign node weights - for i in g.node_indices() { - ng[map[i.index()]] = g[i]; - } - // Add edges - for i in g.edge_indices() { - let (s, t) = g.edge_endpoints(i).unwrap(); - ng.add_edge(map[s.index()], map[t.index()], g[i]); - } - if g.node_count() < 20 && g.edge_count() < 50 { - assert!(is_isomorphic(&*g, &ng)); - } - assert!(is_isomorphic_matching( - &*g, - &ng, - PartialEq::eq, - PartialEq::eq - )); - } - true - } - quickcheck::quickcheck(prop::<Undirected> as fn(_) -> bool); - quickcheck::quickcheck(prop::<Directed> as fn(_) -> bool); -} - -#[test] -fn isomorphism_modify() { - // using small weights so that duplicates are likely - fn prop<Ty: EdgeType>(g: Small<Graph<i16, i8, Ty>>, node: u8, edge: u8) -> bool { - println!("graph {:#?}", g); - let mut ng = (*g).clone(); - let i = node_index(node as usize); - let j = edge_index(edge as usize); - if i.index() < g.node_count() { - ng[i] = (g[i] == 0) as i16; - } - if j.index() < g.edge_count() { - ng[j] = (g[j] == 0) as i8; - } - if i.index() < g.node_count() || j.index() < g.edge_count() { - assert!(!is_isomorphic_matching( - &*g, - &ng, - PartialEq::eq, - PartialEq::eq - )); - } else { - assert!(is_isomorphic_matching( - &*g, - &ng, - PartialEq::eq, - PartialEq::eq - )); - } - true - } - quickcheck::quickcheck(prop::<Undirected> as fn(_, _, _) -> bool); - quickcheck::quickcheck(prop::<Directed> as fn(_, _, _) -> bool); -} - -#[test] -fn graph_remove_edge() { - fn prop<Ty: EdgeType>(mut g: Graph<(), (), Ty>, a: u8, b: u8) -> bool { - let a = node_index(a as usize); - let b = node_index(b as usize); - let edge = g.find_edge(a, b); - if !g.is_directed() { - assert_eq!(edge.is_some(), g.find_edge(b, a).is_some()); - } - if let Some(ex) = edge { - assert!(g.remove_edge(ex).is_some()); - } - assert_graph_consistent(&g); - assert!(g.find_edge(a, b).is_none()); - assert!(g.neighbors(a).find(|x| *x == b).is_none()); - if !g.is_directed() { - assert!(g.neighbors(b).find(|x| *x == a).is_none()); - } - true - } - quickcheck::quickcheck(prop as fn(Graph<_, _, Undirected>, _, _) -> bool); - quickcheck::quickcheck(prop as fn(Graph<_, _, Directed>, _, _) -> bool); -} - -#[cfg(feature = "stable_graph")] -#[test] -fn stable_graph_remove_edge() { - fn prop<Ty: EdgeType>(mut g: StableGraph<(), (), Ty>, a: u8, b: u8) -> bool { - let a = node_index(a as usize); - let b = node_index(b as usize); - let edge = g.find_edge(a, b); - if !g.is_directed() { - assert_eq!(edge.is_some(), g.find_edge(b, a).is_some()); - } - if let Some(ex) = edge { - assert!(g.remove_edge(ex).is_some()); - } - //assert_graph_consistent(&g); - assert!(g.find_edge(a, b).is_none()); - assert!(g.neighbors(a).find(|x| *x == b).is_none()); - if !g.is_directed() { - assert!(g.find_edge(b, a).is_none()); - assert!(g.neighbors(b).find(|x| *x == a).is_none()); - } - true - } - quickcheck::quickcheck(prop as fn(StableGraph<_, _, Undirected>, _, _) -> bool); - quickcheck::quickcheck(prop as fn(StableGraph<_, _, Directed>, _, _) -> bool); -} - -#[cfg(feature = "stable_graph")] -#[test] -fn stable_graph_add_remove_edges() { - fn prop<Ty: EdgeType>(mut g: StableGraph<(), (), Ty>, edges: Vec<(u8, u8)>) -> bool { - for &(a, b) in &edges { - let a = node_index(a as usize); - let b = node_index(b as usize); - let edge = g.find_edge(a, b); - - if edge.is_none() && g.contains_node(a) && g.contains_node(b) { - let _index = g.add_edge(a, b, ()); - continue; - } - - if !g.is_directed() { - assert_eq!(edge.is_some(), g.find_edge(b, a).is_some()); - } - if let Some(ex) = edge { - assert!(g.remove_edge(ex).is_some()); - } - //assert_graph_consistent(&g); - assert!( - g.find_edge(a, b).is_none(), - "failed to remove edge {:?} from graph {:?}", - (a, b), - g - ); - assert!(g.neighbors(a).find(|x| *x == b).is_none()); - if !g.is_directed() { - assert!(g.find_edge(b, a).is_none()); - assert!(g.neighbors(b).find(|x| *x == a).is_none()); - } - } - true - } - quickcheck::quickcheck(prop as fn(StableGraph<_, _, Undirected>, _) -> bool); - quickcheck::quickcheck(prop as fn(StableGraph<_, _, Directed>, _) -> bool); -} - -fn assert_graphmap_consistent<N, E, Ty>(g: &GraphMap<N, E, Ty>) -where - Ty: EdgeType, - N: NodeTrait + fmt::Debug, -{ - for (a, b, _weight) in g.all_edges() { - assert!( - g.contains_edge(a, b), - "Edge not in graph! {:?} to {:?}", - a, - b - ); - assert!( - g.neighbors(a).find(|x| *x == b).is_some(), - "Edge {:?} not in neighbor list for {:?}", - (a, b), - a - ); - if !g.is_directed() { - assert!( - g.neighbors(b).find(|x| *x == a).is_some(), - "Edge {:?} not in neighbor list for {:?}", - (b, a), - b - ); - } - } -} - -#[test] -fn graphmap_remove() { - fn prop<Ty: EdgeType>(mut g: GraphMap<i8, (), Ty>, a: i8, b: i8) -> bool { - //if g.edge_count() > 20 { return true; } - assert_graphmap_consistent(&g); - let contains = g.contains_edge(a, b); - if !g.is_directed() { - assert_eq!(contains, g.contains_edge(b, a)); - } - assert_eq!(g.remove_edge(a, b).is_some(), contains); - assert!(!g.contains_edge(a, b) && g.neighbors(a).find(|x| *x == b).is_none()); - //(g.is_directed() || g.neighbors(b).find(|x| *x == a).is_none())); - assert!(g.remove_edge(a, b).is_none()); - assert_graphmap_consistent(&g); - true - } - quickcheck::quickcheck(prop as fn(DiGraphMap<_, _>, _, _) -> bool); - quickcheck::quickcheck(prop as fn(UnGraphMap<_, _>, _, _) -> bool); -} - -#[test] -fn graphmap_add_remove() { - fn prop(mut g: UnGraphMap<i8, ()>, a: i8, b: i8) -> bool { - assert_eq!(g.contains_edge(a, b), g.add_edge(a, b, ()).is_some()); - g.remove_edge(a, b); - !g.contains_edge(a, b) - && g.neighbors(a).find(|x| *x == b).is_none() - && g.neighbors(b).find(|x| *x == a).is_none() - } - quickcheck::quickcheck(prop as fn(_, _, _) -> bool); -} - -fn sort_sccs<T: Ord>(v: &mut [Vec<T>]) { - for scc in &mut *v { - scc.sort(); - } - v.sort(); -} - -quickcheck! { - fn graph_sccs(g: Graph<(), ()>) -> bool { - let mut sccs = kosaraju_scc(&g); - let mut tsccs = tarjan_scc(&g); - sort_sccs(&mut sccs); - sort_sccs(&mut tsccs); - if sccs != tsccs { - println!("{:?}", - Dot::with_config(&g, &[Config::EdgeNoLabel, - Config::NodeIndexLabel])); - println!("Sccs {:?}", sccs); - println!("Sccs (Tarjan) {:?}", tsccs); - return false; - } - true - } -} - -quickcheck! { - fn kosaraju_scc_is_topo_sort(g: Graph<(), ()>) -> bool { - let tsccs = kosaraju_scc(&g); - let firsts = tsccs.iter().rev().map(|v| v[0]).collect::<Vec<_>>(); - subset_is_topo_order(&g, &firsts) - } -} - -quickcheck! { - fn tarjan_scc_is_topo_sort(g: Graph<(), ()>) -> bool { - let tsccs = tarjan_scc(&g); - let firsts = tsccs.iter().rev().map(|v| v[0]).collect::<Vec<_>>(); - subset_is_topo_order(&g, &firsts) - } -} - -quickcheck! { - // Reversed edges gives the same sccs (when sorted) - fn graph_reverse_sccs(g: Graph<(), ()>) -> bool { - let mut sccs = kosaraju_scc(&g); - let mut tsccs = kosaraju_scc(Reversed(&g)); - sort_sccs(&mut sccs); - sort_sccs(&mut tsccs); - if sccs != tsccs { - println!("{:?}", - Dot::with_config(&g, &[Config::EdgeNoLabel, - Config::NodeIndexLabel])); - println!("Sccs {:?}", sccs); - println!("Sccs (Reversed) {:?}", tsccs); - return false; - } - true - } -} - -quickcheck! { - // Reversed edges gives the same sccs (when sorted) - fn graphmap_reverse_sccs(g: DiGraphMap<u16, ()>) -> bool { - let mut sccs = kosaraju_scc(&g); - let mut tsccs = kosaraju_scc(Reversed(&g)); - sort_sccs(&mut sccs); - sort_sccs(&mut tsccs); - if sccs != tsccs { - println!("{:?}", - Dot::with_config(&g, &[Config::EdgeNoLabel, - Config::NodeIndexLabel])); - println!("Sccs {:?}", sccs); - println!("Sccs (Reversed) {:?}", tsccs); - return false; - } - true - } -} - -#[test] -fn graph_condensation_acyclic() { - fn prop(g: Graph<(), ()>) -> bool { - !is_cyclic_directed(&condensation(g, /* make_acyclic */ true)) - } - quickcheck::quickcheck(prop as fn(_) -> bool); -} - -#[derive(Debug, Clone)] -struct DAG<N: Default + Clone + Send + 'static>(Graph<N, ()>); - -impl<N: Default + Clone + Send + 'static> Arbitrary for DAG<N> { - fn arbitrary<G: Gen>(g: &mut G) -> Self { - let nodes = usize::arbitrary(g); - if nodes == 0 { - return DAG(Graph::with_capacity(0, 0)); - } - let split = g.gen_range(0., 1.); - let max_width = f64::sqrt(nodes as f64) as usize; - let tall = (max_width as f64 * split) as usize; - let fat = max_width - tall; - - let edge_prob = 1. - (1. - g.gen_range(0., 1.)) * (1. - g.gen_range(0., 1.)); - let edges = ((nodes as f64).powi(2) * edge_prob) as usize; - let mut gr = Graph::with_capacity(nodes, edges); - let mut nodes = 0; - for _ in 0..tall { - let cur_nodes = g.gen_range(0, fat); - for _ in 0..cur_nodes { - gr.add_node(N::default()); - } - for j in 0..nodes { - for k in 0..cur_nodes { - if g.gen_range(0., 1.) < edge_prob { - gr.add_edge(NodeIndex::new(j), NodeIndex::new(k + nodes), ()); - } - } - } - nodes += cur_nodes; - } - DAG(gr) - } - - // shrink the graph by splitting it in two by a very - // simple algorithm, just even and odd node indices - fn shrink(&self) -> Box<dyn Iterator<Item = Self>> { - let self_ = self.clone(); - Box::new((0..2).filter_map(move |x| { - let gr = self_.0.filter_map( - |i, w| { - if i.index() % 2 == x { - Some(w.clone()) - } else { - None - } - }, - |_, w| Some(w.clone()), - ); - // make sure we shrink - if gr.node_count() < self_.0.node_count() { - Some(DAG(gr)) - } else { - None - } - })) - } -} - -fn is_topo_order<N>(gr: &Graph<N, (), Directed>, order: &[NodeIndex]) -> bool { - if gr.node_count() != order.len() { - println!( - "Graph ({}) and count ({}) had different amount of nodes.", - gr.node_count(), - order.len() - ); - return false; - } - // check all the edges of the graph - for edge in gr.raw_edges() { - let a = edge.source(); - let b = edge.target(); - let ai = order.find(&a).unwrap(); - let bi = order.find(&b).unwrap(); - if ai >= bi { - println!("{:?} > {:?} ", a, b); - return false; - } - } - true -} - -fn subset_is_topo_order<N>(gr: &Graph<N, (), Directed>, order: &[NodeIndex]) -> bool { - if gr.node_count() < order.len() { - println!( - "Graph (len={}) had less nodes than order (len={})", - gr.node_count(), - order.len() - ); - return false; - } - // check all the edges of the graph - for edge in gr.raw_edges() { - let a = edge.source(); - let b = edge.target(); - if a == b { - continue; - } - // skip those that are not in the subset - let ai = match order.find(&a) { - Some(i) => i, - None => continue, - }; - let bi = match order.find(&b) { - Some(i) => i, - None => continue, - }; - if ai >= bi { - println!("{:?} > {:?} ", a, b); - return false; - } - } - true -} - -#[test] -fn full_topo() { - fn prop(DAG(gr): DAG<()>) -> bool { - let order = toposort(&gr, None).unwrap(); - is_topo_order(&gr, &order) - } - quickcheck::quickcheck(prop as fn(_) -> bool); -} - -#[test] -fn full_topo_generic() { - fn prop_generic(DAG(mut gr): DAG<usize>) -> bool { - assert!(!is_cyclic_directed(&gr)); - let mut index = 0; - let mut topo = Topo::new(&gr); - while let Some(nx) = topo.next(&gr) { - gr[nx] = index; - index += 1; - } - - let mut order = Vec::new(); - index = 0; - let mut topo = Topo::new(&gr); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - assert_eq!(gr[nx], index); - index += 1; - } - if !is_topo_order(&gr, &order) { - println!("{:?}", gr); - return false; - } - - { - order.clear(); - let mut topo = Topo::new(&gr); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - } - if !is_topo_order(&gr, &order) { - println!("{:?}", gr); - return false; - } - } - - { - order.clear(); - let init_nodes = gr.node_identifiers().filter(|n| { - gr.neighbors_directed(n.clone(), Direction::Incoming) - .next() - .is_none() - }); - let mut topo = Topo::with_initials(&gr, init_nodes); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - } - if !is_topo_order(&gr, &order) { - println!("{:?}", gr); - return false; - } - } - - { - order.clear(); - let mut topo = Topo::with_initials(&gr, gr.node_identifiers()); - while let Some(nx) = topo.next(&gr) { - order.push(nx); - } - if !is_topo_order(&gr, &order) { - println!("{:?}", gr); - return false; - } - } - true - } - quickcheck::quickcheck(prop_generic as fn(_) -> bool); -} - -quickcheck! { - // checks that the distances computed by dijkstra satisfy the triangle - // inequality. - fn dijkstra_triangle_ineq(g: Graph<u32, u32>, node: usize) -> bool { - if g.node_count() == 0 { - return true; - } - let v = node_index(node % g.node_count()); - let distances = dijkstra(&g, v, None, |e| *e.weight()); - for v2 in distances.keys() { - let dv2 = distances[v2]; - // triangle inequality: - // d(v,u) <= d(v,v2) + w(v2,u) - for edge in g.edges(*v2) { - let u = edge.target(); - let w = edge.weight(); - if distances.contains_key(&u) && distances[&u] > dv2 + w { - return false; - } - } - } - true - } -} - -quickcheck! { - // checks that the distances computed by k'th shortest path is always greater or equal compared to their dijkstra computation - fn k_shortest_path_(g: Graph<u32, u32>, node: usize) -> bool { - if g.node_count() == 0 { - return true; - } - let v = node_index(node % g.node_count()); - let second_best_distances = k_shortest_path(&g, v, None, 2, |e| *e.weight()); - let dijkstra_distances = dijkstra(&g, v, None, |e| *e.weight()); - for v in second_best_distances.keys() { - if second_best_distances[&v] < dijkstra_distances[&v] { - return false; - } - } - true - } -} - -quickcheck! { - // checks floyd_warshall against dijkstra results - fn floyd_warshall_(g: Graph<u32, u32>) -> bool { - if g.node_count() == 0 { - return true; - } - - let fw_res = floyd_warshall(&g, |e| *e.weight()).unwrap(); - - for node1 in g.node_identifiers() { - let dijkstra_res = dijkstra(&g, node1, None, |e| *e.weight()); - - for node2 in g.node_identifiers() { - // if dijkstra found a path then the results must be same - if let Some(distance) = dijkstra_res.get(&node2) { - let floyd_distance = fw_res.get(&(node1, node2)).unwrap(); - if distance != floyd_distance { - return false; - } - } else { - // if there are no path between two nodes then floyd_warshall will return maximum value possible - if *fw_res.get(&(node1, node2)).unwrap() != u32::MAX { - return false; - } - } - } - } - true - } -} - -quickcheck! { - // checks that the complement of the complement is the same as the input if the input does not contain self-loops - fn complement_(g: Graph<u32, u32>, _node: usize) -> bool { - if g.node_count() == 0 { - return true; - } - for x in g.node_indices() { - if g.contains_edge(x, x) { - return true; - } - } - let mut complement_graph: Graph<u32, u32> = Graph::new(); - let mut result: Graph<u32, u32> = Graph::new(); - complement(&g, &mut complement_graph, 0); - complement(&complement_graph, &mut result, 0); - - for x in g.node_indices() { - for y in g.node_indices() { - if g.contains_edge(x, y) != result.contains_edge(x, y){ - return false; - } - } - } - true - } -} - -fn set<I>(iter: I) -> HashSet<I::Item> -where - I: IntoIterator, - I::Item: Hash + Eq, -{ - iter.into_iter().collect() -} - -quickcheck! { - fn dfs_visit(gr: Graph<(), ()>, node: usize) -> bool { - use petgraph::visit::{Visitable, VisitMap}; - use petgraph::visit::DfsEvent::*; - use petgraph::visit::{Time, depth_first_search}; - if gr.node_count() == 0 { - return true; - } - let start_node = node_index(node % gr.node_count()); - - let invalid_time = Time(!0); - let mut discover_time = vec![invalid_time; gr.node_count()]; - let mut finish_time = vec![invalid_time; gr.node_count()]; - let mut has_tree_edge = gr.visit_map(); - let mut edges = HashSet::new(); - depth_first_search(&gr, Some(start_node).into_iter().chain(gr.node_indices()), - |evt| { - match evt { - Discover(n, t) => discover_time[n.index()] = t, - Finish(n, t) => finish_time[n.index()] = t, - TreeEdge(u, v) => { - // v is an ancestor of u - assert!(has_tree_edge.visit(v), "Two tree edges to {:?}!", v); - assert!(discover_time[v.index()] == invalid_time); - assert!(discover_time[u.index()] != invalid_time); - assert!(finish_time[u.index()] == invalid_time); - edges.insert((u, v)); - } - BackEdge(u, v) => { - // u is an ancestor of v - assert!(discover_time[v.index()] != invalid_time); - assert!(finish_time[v.index()] == invalid_time); - edges.insert((u, v)); - } - CrossForwardEdge(u, v) => { - edges.insert((u, v)); - } - } - }); - assert!(discover_time.iter().all(|x| *x != invalid_time)); - assert!(finish_time.iter().all(|x| *x != invalid_time)); - assert_eq!(edges.len(), gr.edge_count()); - assert_eq!(edges, set(gr.edge_references().map(|e| (e.source(), e.target())))); - true - } -} - -quickcheck! { - fn test_bellman_ford(gr: Graph<(), f32>) -> bool { - let mut gr = gr; - for elt in gr.edge_weights_mut() { - *elt = elt.abs(); - } - if gr.node_count() == 0 { - return true; - } - for (i, start) in gr.node_indices().enumerate() { - if i >= 10 { break; } // testing all is too slow - bellman_ford(&gr, start).unwrap(); - } - true - } -} - -quickcheck! { - fn test_find_negative_cycle(gr: Graph<(), f32>) -> bool { - let gr = gr; - if gr.node_count() == 0 { - return true; - } - for (i, start) in gr.node_indices().enumerate() { - if i >= 10 { break; } // testing all is too slow - if let Some(path) = find_negative_cycle(&gr, start) { - assert!(path.len() >= 1); - } - } - true - } -} - -quickcheck! { - fn test_bellman_ford_undir(gr: Graph<(), f32, Undirected>) -> bool { - let mut gr = gr; - for elt in gr.edge_weights_mut() { - *elt = elt.abs(); - } - if gr.node_count() == 0 { - return true; - } - for (i, start) in gr.node_indices().enumerate() { - if i >= 10 { break; } // testing all is too slow - bellman_ford(&gr, start).unwrap(); - } - true - } -} - -defmac!(iter_eq a, b => a.eq(b)); -defmac!(nodes_eq ref a, ref b => a.node_references().eq(b.node_references())); -defmac!(edgew_eq ref a, ref b => a.edge_references().eq(b.edge_references())); -defmac!(edges_eq ref a, ref b => - iter_eq!( - a.edge_references().map(|e| (e.source(), e.target())), - b.edge_references().map(|e| (e.source(), e.target())))); - -quickcheck! { - fn test_di_from(gr1: DiGraph<i32, i32>) -> () { - let sgr = StableGraph::from(gr1.clone()); - let gr2 = Graph::from(sgr); - - assert!(nodes_eq!(&gr1, &gr2)); - assert!(edgew_eq!(&gr1, &gr2)); - assert!(edges_eq!(&gr1, &gr2)); - } - fn test_un_from(gr1: UnGraph<i32, i32>) -> () { - let sgr = StableGraph::from(gr1.clone()); - let gr2 = Graph::from(sgr); - - assert!(nodes_eq!(&gr1, &gr2)); - assert!(edgew_eq!(&gr1, &gr2)); - assert!(edges_eq!(&gr1, &gr2)); - } - - fn test_graph_from_stable_graph(gr1: StableDiGraph<usize, usize>) -> () { - let mut gr1 = gr1; - let gr2 = Graph::from(gr1.clone()); - - // renumber the stablegraph nodes and put the new index in the - // associated data - let mut index = 0; - for i in 0..gr1.node_bound() { - let ni = node_index(i); - if gr1.contains_node(ni) { - gr1[ni] = index; - index += 1; - } - } - if let Some(edge_bound) = gr1.edge_references().next_back() - .map(|ed| ed.id().index() + 1) - { - index = 0; - for i in 0..edge_bound { - let ni = edge_index(i); - if gr1.edge_weight(ni).is_some() { - gr1[ni] = index; - index += 1; - } - } - } - - assert_equal( - // Remap the stablegraph to compact indices - gr1.edge_references().map(|ed| (edge_index(*ed.weight()), gr1[ed.source()], gr1[ed.target()])), - gr2.edge_references().map(|ed| (ed.id(), ed.source().index(), ed.target().index())) - ); - } - - fn stable_di_graph_map_id(gr1: StableDiGraph<usize, usize>) -> () { - let gr2 = gr1.map(|_, &nw| nw, |_, &ew| ew); - assert!(nodes_eq!(&gr1, &gr2)); - assert!(edgew_eq!(&gr1, &gr2)); - assert!(edges_eq!(&gr1, &gr2)); - } - - fn stable_un_graph_map_id(gr1: StableUnGraph<usize, usize>) -> () { - let gr2 = gr1.map(|_, &nw| nw, |_, &ew| ew); - assert!(nodes_eq!(&gr1, &gr2)); - assert!(edgew_eq!(&gr1, &gr2)); - assert!(edges_eq!(&gr1, &gr2)); - } - - fn stable_di_graph_filter_map_id(gr1: StableDiGraph<usize, usize>) -> () { - let gr2 = gr1.filter_map(|_, &nw| Some(nw), |_, &ew| Some(ew)); - assert!(nodes_eq!(&gr1, &gr2)); - assert!(edgew_eq!(&gr1, &gr2)); - assert!(edges_eq!(&gr1, &gr2)); - } - - fn test_stable_un_graph_filter_map_id(gr1: StableUnGraph<usize, usize>) -> () { - let gr2 = gr1.filter_map(|_, &nw| Some(nw), |_, &ew| Some(ew)); - assert!(nodes_eq!(&gr1, &gr2)); - assert!(edgew_eq!(&gr1, &gr2)); - assert!(edges_eq!(&gr1, &gr2)); - } - - fn stable_di_graph_filter_map_remove(gr1: Small<StableDiGraph<i32, i32>>, - nodes: Vec<usize>, - edges: Vec<usize>) -> () - { - let gr2 = gr1.filter_map(|ix, &nw| { - if !nodes.contains(&ix.index()) { Some(nw) } else { None } - }, - |ix, &ew| { - if !edges.contains(&ix.index()) { Some(ew) } else { None } - }); - let check_nodes = &set(gr1.node_indices()) - &set(cloned(&nodes).map(node_index)); - let mut check_edges = &set(gr1.edge_indices()) - &set(cloned(&edges).map(edge_index)); - // remove all edges with endpoint in removed nodes - for edge in gr1.edge_references() { - if nodes.contains(&edge.source().index()) || - nodes.contains(&edge.target().index()) { - check_edges.remove(&edge.id()); - } - } - // assert maintained - for i in check_nodes { - assert_eq!(gr1[i], gr2[i]); - } - for i in check_edges { - assert_eq!(gr1[i], gr2[i]); - assert_eq!(gr1.edge_endpoints(i), gr2.edge_endpoints(i)); - } - - // assert removals - for i in nodes { - assert!(gr2.node_weight(node_index(i)).is_none()); - } - for i in edges { - assert!(gr2.edge_weight(edge_index(i)).is_none()); - } - } -} - -fn naive_closure_foreach<G, F>(g: G, mut f: F) -where - G: Visitable + IntoNeighbors + IntoNodeIdentifiers, - F: FnMut(G::NodeId, G::NodeId), -{ - let mut dfs = Dfs::empty(&g); - for i in g.node_identifiers() { - dfs.reset(&g); - dfs.move_to(i); - while let Some(nx) = dfs.next(&g) { - if i != nx { - f(i, nx); - } - } - } -} - -fn naive_closure<G>(g: G) -> Vec<(G::NodeId, G::NodeId)> -where - G: Visitable + IntoNodeIdentifiers + IntoNeighbors, -{ - let mut res = Vec::new(); - naive_closure_foreach(g, |a, b| res.push((a, b))); - res -} - -fn naive_closure_edgecount<G>(g: G) -> usize -where - G: Visitable + IntoNodeIdentifiers + IntoNeighbors, -{ - let mut res = 0; - naive_closure_foreach(g, |_, _| res += 1); - res -} - -quickcheck! { - fn test_tred(g: DAG<()>) -> bool { - let acyclic = g.0; - println!("acyclic graph {:#?}", &acyclic); - let toposort = toposort(&acyclic, None).unwrap(); - println!("Toposort:"); - for (new, old) in toposort.iter().enumerate() { - println!("{} -> {}", old.index(), new); - } - let (toposorted, revtopo): (petgraph::adj::List<(), usize>, _) = - petgraph::algo::tred::dag_to_toposorted_adjacency_list(&acyclic, &toposort); - println!("checking revtopo"); - for (i, ix) in toposort.iter().enumerate() { - assert_eq!(i, revtopo[ix.index()]); - } - println!("toposorted adjacency list: {:#?}", &toposorted); - let (tred, tclos) = petgraph::algo::tred::dag_transitive_reduction_closure(&toposorted); - println!("tred: {:#?}", &tred); - println!("tclos: {:#?}", &tclos); - if tred.node_count() != tclos.node_count() { - println!("Different node count"); - return false; - } - if acyclic.node_count() != tclos.node_count() { - println!("Different node count from original graph"); - return false; - } - // check the closure - let mut clos_edges: Vec<(_, _)> = tclos.edge_references().map(|i| (i.source(), i.target())).collect(); - clos_edges.sort(); - let mut tred_closure = naive_closure(&tred); - tred_closure.sort(); - if tred_closure != clos_edges { - println!("tclos is not the transitive closure of tred"); - return false - } - // check the transitive reduction is a transitive reduction - for i in tred.edge_references() { - let filtered = EdgeFiltered::from_fn(&tred, |edge| { - edge.source() !=i.source() || edge.target() != i.target() - }); - let new = naive_closure_edgecount(&filtered); - if new >= clos_edges.len() { - println!("when removing ({} -> {}) the transitive closure does not shrink", - i.source().index(), i.target().index()); - return false - } - } - // check that the transitive reduction is included in the original graph - for i in tred.edge_references() { - if acyclic.find_edge(toposort[i.source().index()], toposort[i.target().index()]).is_none() { - println!("tred is not included in the original graph"); - return false - } - } - println!("ok!"); - true - } -} - -quickcheck! { - fn greedy_fas_remaining_graph_is_acyclic(g: StableDiGraph<(), ()>) -> bool { - let mut g = g; - let fas: Vec<EdgeIndex> = greedy_feedback_arc_set(&g).map(|e| e.id()).collect(); - - for edge_id in fas { - g.remove_edge(edge_id); - } - - !is_cyclic_directed(&g) - } - - /// Assert that the size of the feedback arc set of a tournament does not exceed - /// **|E| / 2 - |V| / 6** - fn greedy_fas_performance_within_bound(t: Tournament<(), ()>) -> bool { - let Tournament(g) = t; - - let expected_bound = if g.node_count() < 2 { - 0 - } else { - ((g.edge_count() as f64) / 2.0 - (g.node_count() as f64) / 6.0) as usize - }; - - let fas_size = greedy_feedback_arc_set(&g).count(); - - fas_size <= expected_bound - } -} - -fn is_valid_matching<G: NodeIndexable>(m: &Matching<G>) -> bool { - // A set of edges is a matching if no two edges from the matching share an - // endpoint. - for (s1, t1) in m.edges() { - for (s2, t2) in m.edges() { - if s1 == s2 && t1 == t2 { - continue; - } - - if s1 == s2 || s1 == t2 || t1 == s2 || t1 == t2 { - // Two edges share an endpoint. - return false; - } - } - } - - true -} - -fn is_maximum_matching<G: NodeIndexable + IntoEdges + IntoNodeIdentifiers + Visitable>( - g: G, - m: &Matching<G>, -) -> bool { - // Berge's lemma: a matching is maximum iff there is no augmenting path (a - // path that starts and ends in unmatched vertices, and alternates between - // matched and unmatched edges). Thus if we find an augmenting path, the - // matching is not maximum. - // - // Start with an unmatched node and traverse the graph alternating matched - // and unmatched edges. If an unmatched node is found, then an augmenting - // path was found. - for unmatched in g.node_identifiers().filter(|u| !m.contains_node(*u)) { - let visited = &mut g.visit_map(); - let mut stack = Vec::new(); - - stack.push((unmatched, false)); - while let Some((u, do_matched_edges)) = stack.pop() { - if visited.visit(u) { - for e in g.edges(u) { - if e.source() == e.target() { - // Ignore self-loops. - continue; - } - - let is_matched = m.contains_edge(e.source(), e.target()); - - if do_matched_edges && is_matched || !do_matched_edges && !is_matched { - stack.push((e.target(), !do_matched_edges)); - - // Found another free node (other than the starting one) - // that is unmatched - an augmenting path. - if !is_matched && !m.contains_node(e.target()) && e.target() != unmatched { - return false; - } - } - } - } - } - } - - true -} - -fn is_perfect_matching<G: NodeCount + NodeIndexable>(g: G, m: &Matching<G>) -> bool { - // By definition. - g.node_count() % 2 == 0 && m.edges().count() == g.node_count() / 2 -} - -quickcheck! { - fn matching(g: Graph<(), (), Undirected>) -> bool { - let m1 = greedy_matching(&g); - let m2 = maximum_matching(&g); - - assert!(is_valid_matching(&m1), "greedy_matching returned an invalid matching"); - assert!(is_valid_matching(&m2), "maximum_matching returned an invalid matching"); - assert!(is_maximum_matching(&g, &m2), "maximum_matching returned a matching that is not maximum"); - assert_eq!(m1.is_perfect(), is_perfect_matching(&g, &m1), "greedy_matching incorrectly determined whether the matching is perfect"); - assert_eq!(m2.is_perfect(), is_perfect_matching(&g, &m2), "maximum_matching incorrectly determined whether the matching is perfect"); - - true - } - - fn matching_in_stable_graph(g: StableGraph<(), (), Undirected>) -> bool { - let m1 = greedy_matching(&g); - let m2 = maximum_matching(&g); - - assert!(is_valid_matching(&m1), "greedy_matching returned an invalid matching"); - assert!(is_valid_matching(&m2), "maximum_matching returned an invalid matching"); - assert!(is_maximum_matching(&g, &m2), "maximum_matching returned a matching that is not maximum"); - assert_eq!(m1.is_perfect(), is_perfect_matching(&g, &m1), "greedy_matching incorrectly determined whether the matching is perfect"); - assert_eq!(m2.is_perfect(), is_perfect_matching(&g, &m2), "maximum_matching incorrectly determined whether the matching is perfect"); - - true - } -} - -quickcheck! { - // The ranks are probabilities, - // as such they are positive and they should sum up to 1. - fn test_page_rank_proba(gr: Graph<(), f32>) -> bool { - if gr.node_count() == 0 { - return true; - } - let tol = 1e-10; - let ranks: Vec<f64> = page_rank(&gr, 0.85_f64, 5); - let at_least_one_neg_rank = ranks.iter().any(|rank| *rank < 0.); - let not_sumup_to_one = (ranks.iter().sum::<f64>() - 1.).abs() > tol; - if at_least_one_neg_rank | not_sumup_to_one{ - return false; - } - true - } -} - -fn sum_flows<N, F: std::iter::Sum + Copy>( - gr: &Graph<N, F>, - flows: &[F], - node: NodeIndex, - dir: Direction, -) -> F { - gr.edges_directed(node, dir) - .map(|edge| flows[EdgeIndexable::to_index(&gr, edge.id())]) - .sum::<F>() -} - -quickcheck! { - // 1. (Capacity) - // The flows should be <= capacities - // 2. (Flow conservation) - // For every internal node (i.e a node different from the - // source node and the destination (or sink) node), the sum - // of incoming flows (i.e flows of incoming edges) is equal - // to the sum of the outgoing flows (i.e flows of outgoing edges). - // 3. (Maximum flow) - // It is equal to the sum of the destination node incoming flows and - // also the sum of the outgoing flows of the source node. - fn test_ford_fulkerson_flows(gr: Graph<usize, u32>) -> bool { - if gr.node_count() <= 1 || gr.edge_count() == 0 { - return true; - } - let source = NodeIndex::from(0); - let destination = NodeIndex::from(gr.node_count() as u32 / 2); - let (max_flow, flows) = ford_fulkerson(&gr, source, destination); - let capacity_constraint = flows - .iter() - .enumerate() - .all(|(ix, flow)| flow <= gr.edge_weight(EdgeIndexable::from_index(&gr, ix)).unwrap()); - let flow_conservation_constraint = (0..gr.node_count()).all(|ix| { - let node = NodeIndexable::from_index(&gr, ix); - if (node != source) && (node != destination){ - sum_flows(&gr, &flows, node, Direction::Outgoing) - == sum_flows(&gr, &flows, node, Direction::Incoming) - } else {true} - }); - let max_flow_constaint = (sum_flows(&gr, &flows, source, Direction::Outgoing) == max_flow) - && (sum_flows(&gr, &flows, destination, Direction::Incoming) == max_flow); - return capacity_constraint && flow_conservation_constraint && max_flow_constaint; - } -} - -quickcheck! { - fn test_dynamic_toposort(g: DiGraph<(), ()>) -> bool { - use petgraph::acyclic::Acyclic; - use petgraph::data::{Build, Create}; - use petgraph::algo::toposort; - use std::collections::BTreeMap; - use std::iter; - - // We will re-build `g` from scratch, adding edges one by one. - let mut acylic_g = - Acyclic::<DiGraph<(), ()>>::with_capacity(g.node_count(), g.edge_count()); - let mut new_g = DiGraph::<(), ()>::new(); - - // This test is quite slow, so we bound the number of nodes. - const MAX_NODES: usize = 30; - let nodes: BTreeSet<_> = g.node_indices().take(MAX_NODES).collect(); - - // Add all nodes - let acyclic_nodes: BTreeMap<_, _> = nodes - .iter() - .zip(iter::repeat_with(|| acylic_g.add_node(()))) - .collect(); - let new_nodes: BTreeMap<_, _> = nodes - .iter() - .zip(iter::repeat_with(|| new_g.add_node(()))) - .collect(); - - // Now add edges one by one - for e in g.edge_indices() { - let (src, dst) = g.edge_endpoints(e).unwrap(); - if !nodes.contains(&src) || !nodes.contains(&dst) { - continue; - } - let new_g_backup = new_g.clone(); - - // Add the edge to the new graph - new_g.add_edge(new_nodes[&src], new_nodes[&dst], ()); - let is_dag_exp = toposort(&new_g, None).is_ok(); - - // Add the edge to the acyclic graph - let is_dag_dyn = acylic_g - .try_add_edge(acyclic_nodes[&src], acyclic_nodes[&dst], ()) - .is_ok(); - - // Check that both approaches agree on whether the graph is a DAG - assert_eq!(is_dag_exp, is_dag_dyn); - - if !is_dag_exp { - // Remove the edge that makes it non-acyclic - new_g = new_g_backup; - } - } - true - } -} - -fn is_proper_coloring<G>(g: G, coloring: &HashMap<G::NodeId, usize>) -> bool -where - G: IntoNodeIdentifiers + IntoEdges, - G::NodeId: Eq + Hash, -{ - for node in g.node_identifiers() { - for nbor in g.neighbors(node) { - if node != nbor && coloring[&node] == coloring[&nbor] { - return false; - } - } - } - return true; -} - -quickcheck! { - fn dsatur_coloring_quickcheck(g: Graph<(), (), Undirected>) -> bool { - let (coloring, _) = dsatur_coloring(&g); - assert!(is_proper_coloring(&g, &coloring), "dsatur_coloring returned a non proper coloring"); - true - } -} diff --git a/vendor/petgraph/tests/res/graph_1000n_1000e.txt b/vendor/petgraph/tests/res/graph_1000n_1000e.txt deleted file mode 100644 index 8983c778..00000000 --- a/vendor/petgraph/tests/res/graph_1000n_1000e.txt +++ /dev/null @@ -1,1000 +0,0 @@ -0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 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\ No newline at end of file diff --git a/vendor/petgraph/tests/stable_graph.rs b/vendor/petgraph/tests/stable_graph.rs deleted file mode 100644 index 48a7b88b..00000000 --- a/vendor/petgraph/tests/stable_graph.rs +++ /dev/null @@ -1,495 +0,0 @@ -#![cfg(feature = "stable_graph")] - -extern crate itertools; -extern crate petgraph; -#[macro_use] -extern crate defmac; - -use std::collections::HashSet; - -use itertools::assert_equal; -use petgraph::algo::{kosaraju_scc, min_spanning_tree, tarjan_scc}; -use petgraph::dot::Dot; -use petgraph::prelude::*; -use petgraph::stable_graph::edge_index as e; -use petgraph::stable_graph::node_index as n; -use petgraph::visit::{EdgeIndexable, IntoEdgeReferences, IntoNodeReferences, NodeIndexable}; -use petgraph::EdgeType; - -#[test] -fn node_indices() { - let mut g = StableGraph::<_, ()>::new(); - let a = g.add_node(0); - let b = g.add_node(1); - let c = g.add_node(2); - g.remove_node(b); - let mut iter = g.node_indices(); - assert_eq!(iter.next(), Some(a)); - assert_eq!(iter.next(), Some(c)); - assert_eq!(iter.next(), None); -} - -#[test] -fn node_bound() { - let mut g = StableGraph::<_, ()>::new(); - assert_eq!(g.node_bound(), g.node_count()); - for i in 0..10 { - g.add_node(i); - assert_eq!(g.node_bound(), g.node_count()); - } - let full_count = g.node_count(); - g.remove_node(n(0)); - g.remove_node(n(2)); - assert_eq!(g.node_bound(), full_count); - g.clear(); - assert_eq!(g.node_bound(), 0); -} - -#[test] -fn edge_bound() { - let mut g = StableGraph::<_, _>::new(); - assert_eq!(g.edge_bound(), g.edge_count()); - for i in 0..10 { - g.add_node(i); - } - for i in 0..9 { - g.add_edge(n(i), n(i + 1), i); - assert_eq!(g.edge_bound(), g.edge_count()); - } - let full_count = g.edge_count(); - g.remove_edge(e(0)); - g.remove_edge(e(2)); - assert_eq!(g.edge_bound(), full_count); - g.clear(); - assert_eq!(g.edge_bound(), 0); -} - -#[test] -fn clear_edges() { - let mut gr = scc_graph(); - gr.remove_node(n(1)); - gr.clear_edges(); - // check that we use the free list for the vacancies - assert_eq!(gr.add_node(()), n(1)); - assert_eq!(gr.add_node(()), n(4)); - assert!(gr.edge_references().next().is_none()); - assert!(gr.node_indices().all(|i| gr.neighbors(i).next().is_none())); -} - -fn assert_sccs_eq(mut res: Vec<Vec<NodeIndex>>, normalized: Vec<Vec<NodeIndex>>) { - // normalize the result and compare with the answer. - for scc in &mut res { - scc.sort(); - } - // sort by minimum element - res.sort_by(|v, w| v[0].cmp(&w[0])); - assert_eq!(res, normalized); -} - -fn scc_graph() -> StableGraph<(), ()> { - let mut gr: StableGraph<(), ()> = StableGraph::from_edges(&[ - (6, 0), - (0, 3), - (3, 6), - (8, 6), - (8, 2), - (2, 5), - (5, 8), - (7, 5), - (1, 7), - (7, 4), - (4, 1), - ]); - // make an identical replacement of n(4) and leave a hole - let x = gr.add_node(()); - gr.add_edge(n(7), x, ()); - gr.add_edge(x, n(1), ()); - gr.remove_node(n(4)); - gr -} - -#[test] -fn test_scc() { - let gr = scc_graph(); - println!("{:?}", gr); - - let x = n(gr.node_bound() - 1); - assert_sccs_eq( - kosaraju_scc(&gr), - vec![ - vec![n(0), n(3), n(6)], - vec![n(1), n(7), x], - vec![n(2), n(5), n(8)], - ], - ); -} - -#[test] -fn test_tarjan_scc() { - let gr = scc_graph(); - - let x = n(gr.node_bound() - 1); - assert_sccs_eq( - tarjan_scc(&gr), - vec![ - vec![n(0), n(3), n(6)], - vec![n(1), n(7), x], - vec![n(2), n(5), n(8)], - ], - ); -} - -fn make_graph<Ty>() -> StableGraph<(), i32, Ty> -where - Ty: EdgeType, -{ - let mut gr = StableGraph::default(); - let mut c = 0..; - let mut e = || -> i32 { c.next().unwrap() }; - gr.extend_with_edges(&[ - (6, 0, e()), - (0, 3, e()), - (3, 6, e()), - (8, 6, e()), - (8, 2, e()), - (2, 5, e()), - (5, 8, e()), - (7, 5, e()), - (1, 7, e()), - (7, 4, e()), - (8, 6, e()), // parallel edge - (4, 1, e()), - ]); - // make an identical replacement of n(4) and leave a hole - let x = gr.add_node(()); - gr.add_edge(n(7), x, e()); - gr.add_edge(x, n(1), e()); - gr.add_edge(x, x, e()); // make two self loops - let rm_self_loop = gr.add_edge(x, x, e()); - gr.add_edge(x, x, e()); - gr.remove_node(n(4)); - gr.remove_node(n(6)); - gr.remove_edge(rm_self_loop); - gr -} - -defmac!(edges ref gr, x => gr.edges(x).map(|r| (r.target(), *r.weight()))); - -#[test] -fn test_edges_directed() { - let gr = make_graph::<Directed>(); - let x = n(9); - assert_equal(edges!(&gr, x), vec![(x, 16), (x, 14), (n(1), 13)]); - assert_equal(edges!(&gr, n(0)), vec![(n(3), 1)]); - assert_equal(edges!(&gr, n(4)), vec![]); -} - -#[test] -fn test_edge_references() { - let gr = make_graph::<Directed>(); - assert_eq!(gr.edge_count(), gr.edge_references().count()); -} - -#[test] -fn test_edges_undirected() { - let gr = make_graph::<Undirected>(); - let x = n(9); - assert_equal( - edges!(&gr, x), - vec![(x, 16), (x, 14), (n(1), 13), (n(7), 12)], - ); - assert_equal(edges!(&gr, n(0)), vec![(n(3), 1)]); - assert_equal(edges!(&gr, n(4)), vec![]); -} - -#[test] -fn test_edge_iterators_directed() { - let gr = make_graph::<Directed>(); - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Outgoing), gr.edges(i)); - for edge in gr.edges_directed(i, Outgoing) { - assert_eq!( - edge.source(), - i, - "outgoing edges should have a fixed source" - ); - } - } - let mut incoming = vec![Vec::new(); gr.node_bound()]; - - for i in gr.node_indices() { - for j in gr.neighbors(i) { - incoming[j.index()].push(i); - } - } - - println!("{:#?}", gr); - for i in gr.node_indices() { - itertools::assert_equal( - gr.edges_directed(i, Incoming).map(|e| e.source()), - incoming[i.index()].iter().rev().cloned(), - ); - for edge in gr.edges_directed(i, Incoming) { - assert_eq!( - edge.target(), - i, - "incoming edges should have a fixed target" - ); - } - } -} - -#[test] -fn test_edge_iterators_undir() { - let gr = make_graph::<Undirected>(); - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Outgoing), gr.edges(i)); - for edge in gr.edges_directed(i, Outgoing) { - assert_eq!( - edge.source(), - i, - "outgoing edges should have a fixed source" - ); - } - } - for i in gr.node_indices() { - itertools::assert_equal(gr.edges_directed(i, Incoming), gr.edges(i)); - for edge in gr.edges_directed(i, Incoming) { - assert_eq!( - edge.target(), - i, - "incoming edges should have a fixed target" - ); - } - } -} - -#[test] -#[should_panic(expected = "is not a node")] -fn add_edge_vacant() { - let mut g = StableGraph::<_, _>::new(); - let a = g.add_node(0); - let b = g.add_node(1); - let _ = g.add_node(2); - let _ = g.remove_node(b); - g.add_edge(a, b, 1); -} - -#[test] -#[should_panic(expected = "is not a node")] -fn add_edge_oob() { - let mut g = StableGraph::<_, _>::new(); - let a = g.add_node(0); - let _ = g.add_node(1); - let _ = g.add_node(2); - g.add_edge(a, n(4), 1); -} - -#[test] -fn test_node_references() { - let gr = scc_graph(); - - itertools::assert_equal(gr.node_references().map(|(i, _)| i), gr.node_indices()); -} - -#[test] -fn iterators_undir() { - let mut g = StableUnGraph::<_, _>::default(); - let a = g.add_node(0); - let b = g.add_node(1); - let c = g.add_node(2); - let d = g.add_node(3); - g.extend_with_edges(&[(a, b, 1), (a, c, 2), (b, c, 3), (c, c, 4), (a, d, 5)]); - g.remove_node(b); - - itertools::assert_equal(g.neighbors(a), vec![d, c]); - itertools::assert_equal(g.neighbors(c), vec![c, a]); - itertools::assert_equal(g.neighbors(d), vec![a]); - - // the node that was removed - itertools::assert_equal(g.neighbors(b), vec![]); - - // remove one more - g.remove_node(c); - itertools::assert_equal(g.neighbors(c), vec![]); -} - -#[test] -fn iter_multi_edges() { - let mut gr = StableGraph::new(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - - let mut connecting_edges = HashSet::new(); - - gr.add_edge(a, a, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - gr.add_edge(a, c, ()); - gr.add_edge(c, b, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - gr.add_edge(b, a, ()); - - let mut iter = gr.edges_connecting(a, b); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - assert_eq!(None, iter.next()); - assert!(connecting_edges.is_empty()); -} - -#[test] -fn iter_multi_undirected_edges() { - let mut gr: StableUnGraph<_, _> = Default::default(); - let a = gr.add_node("a"); - let b = gr.add_node("b"); - let c = gr.add_node("c"); - - let mut connecting_edges = HashSet::new(); - - gr.add_edge(a, a, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - gr.add_edge(a, c, ()); - gr.add_edge(c, b, ()); - connecting_edges.insert(gr.add_edge(a, b, ())); - connecting_edges.insert(gr.add_edge(b, a, ())); - - let mut iter = gr.edges_connecting(a, b); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - let edge_id = iter.next().unwrap().id(); - assert!(connecting_edges.contains(&edge_id)); - connecting_edges.remove(&edge_id); - - assert_eq!(None, iter.next()); - assert!(connecting_edges.is_empty()); -} - -#[test] -fn dot() { - let mut gr = StableGraph::new(); - let a = gr.add_node("x"); - let b = gr.add_node("y"); - gr.add_edge(a, a, "10"); - gr.add_edge(a, b, "20"); - let dot_output = format!("{}", Dot::new(&gr)); - assert_eq!( - dot_output, - r#"digraph { - 0 [ label = "x" ] - 1 [ label = "y" ] - 0 -> 0 [ label = "10" ] - 0 -> 1 [ label = "20" ] -} -"# - ); -} - -defmac!(iter_eq a, b => a.eq(b)); -defmac!(nodes_eq ref a, ref b => a.node_references().eq(b.node_references())); -defmac!(edgew_eq ref a, ref b => a.edge_references().eq(b.edge_references())); -defmac!(edges_eq ref a, ref b => - iter_eq!( - a.edge_references().map(|e| (e.source(), e.target())), - b.edge_references().map(|e| (e.source(), e.target())))); - -#[test] -fn from() { - let mut gr1 = StableGraph::new(); - let a = gr1.add_node(1); - let b = gr1.add_node(2); - let c = gr1.add_node(3); - gr1.add_edge(a, a, 10); - gr1.add_edge(a, b, 20); - gr1.add_edge(b, c, 30); - gr1.add_edge(a, c, 40); - - let gr2 = Graph::from(gr1.clone()); - let gr3 = StableGraph::from(gr2); - assert!(nodes_eq!(&gr1, &gr3)); - assert!(edgew_eq!(&gr1, &gr3)); - assert!(edges_eq!(&gr1, &gr3)); - - gr1.remove_node(b); - - let gr4 = Graph::from(gr1); - let gr5 = StableGraph::from(gr4.clone()); - - let mut ans = StableGraph::new(); - let a = ans.add_node(1); - let c = ans.add_node(3); - ans.add_edge(a, a, 10); - ans.add_edge(a, c, 40); - - assert!(nodes_eq!(&gr4, &ans)); - assert!(edges_eq!(&gr4, &ans)); - - assert!(nodes_eq!(&gr5, &ans)); - assert!(edgew_eq!(&gr5, &ans)); - assert!(edges_eq!(&gr5, &ans)); -} - -use petgraph::data::FromElements; -use petgraph::stable_graph::StableGraph; - -#[test] -fn from_min_spanning_tree() { - let mut g = StableGraph::new(); - let mut nodes = Vec::new(); - for _ in 0..6 { - nodes.push(g.add_node(())); - } - let es = [(4, 5), (3, 4), (3, 5)]; - for &(a, b) in es.iter() { - g.add_edge(NodeIndex::new(a), NodeIndex::new(b), ()); - } - for &node in nodes.iter().take(3) { - let _ = g.remove_node(node); - } - let _ = StableGraph::<(), (), Undirected, usize>::from_elements(min_spanning_tree(&g)); -} - -#[test] -fn weights_mut_iterator() { - let mut gr = StableGraph::new(); - let a = gr.add_node(1); - let b = gr.add_node(2); - let c = gr.add_node(3); - let e1 = gr.add_edge(a, a, 10); - let e2 = gr.add_edge(a, b, 20); - let e3 = gr.add_edge(b, c, 30); - let e4 = gr.add_edge(a, c, 40); - - for n in gr.node_weights_mut() { - *n += 1; - } - assert_eq!(gr[a], 2); - assert_eq!(gr[b], 3); - assert_eq!(gr[c], 4); - - for e in gr.edge_weights_mut() { - *e -= 1; - } - assert_eq!(gr[e1], 9); - assert_eq!(gr[e2], 19); - assert_eq!(gr[e3], 29); - assert_eq!(gr[e4], 39); - - // test on deletion - gr.remove_node(b); - assert_eq!(gr.node_weights_mut().count(), gr.node_count()); - assert_eq!(gr.edge_weights_mut().count(), gr.edge_count()); -} diff --git a/vendor/petgraph/tests/unionfind.rs b/vendor/petgraph/tests/unionfind.rs deleted file mode 100644 index 8b54db76..00000000 --- a/vendor/petgraph/tests/unionfind.rs +++ /dev/null @@ -1,105 +0,0 @@ -extern crate petgraph; -extern crate rand; - -use petgraph::unionfind::UnionFind; -use rand::{thread_rng, ChaChaRng, Rng, SeedableRng}; -use std::collections::HashSet; - -#[test] -fn uf_test() { - let n = 8; - let mut u = UnionFind::new(n); - for i in 0..n { - assert_eq!(u.find(i), i); - assert_eq!(u.find_mut(i), i); - assert!(!u.union(i, i)); - } - - u.union(0, 1); - assert_eq!(u.find(0), u.find(1)); - u.union(1, 3); - u.union(1, 4); - u.union(4, 7); - assert_eq!(u.find(0), u.find(3)); - assert_eq!(u.find(1), u.find(3)); - assert!(u.find(0) != u.find(2)); - assert_eq!(u.find(7), u.find(0)); - u.union(5, 6); - assert_eq!(u.find(6), u.find(5)); - assert!(u.find(6) != u.find(7)); - - // check that there are now 3 disjoint sets - let set = (0..n).map(|i| u.find(i)).collect::<HashSet<_>>(); - assert_eq!(set.len(), 3); -} - -#[test] -fn uf_test_with_equiv() { - let n = 8; - let mut u = UnionFind::new(n); - for i in 0..n { - assert_eq!(u.find(i), i); - assert_eq!(u.find_mut(i), i); - assert!(u.equiv(i, i)); - } - - u.union(0, 1); - assert!(u.equiv(0, 1)); - u.union(1, 3); - u.union(1, 4); - u.union(4, 7); - assert!(u.equiv(0, 7)); - assert!(u.equiv(1, 3)); - assert!(!u.equiv(0, 2)); - assert!(u.equiv(7, 0)); - u.union(5, 6); - assert!(u.equiv(6, 5)); - assert!(!u.equiv(6, 7)); - - // check that there are now 3 disjoint sets - let set = (0..n).map(|i| u.find(i)).collect::<HashSet<_>>(); - assert_eq!(set.len(), 3); -} - -#[test] -fn uf_rand() { - let n = 1 << 14; - let mut rng = ChaChaRng::from_rng(thread_rng()).unwrap(); - let mut u = UnionFind::new(n); - for _ in 0..100 { - let a = rng.gen_range(0, n); - let b = rng.gen_range(0, n); - let ar = u.find(a); - let br = u.find(b); - assert_eq!(ar != br, u.union(a, b)); - } -} - -#[test] -fn uf_u8() { - let n = 256; - let mut rng = ChaChaRng::from_rng(thread_rng()).unwrap(); - let mut u = UnionFind::<u8>::new(n); - for _ in 0..(n * 8) { - let a = rng.gen(); - let b = rng.gen(); - let ar = u.find(a); - let br = u.find(b); - assert_eq!(ar != br, u.union(a, b)); - } -} - -#[test] -fn labeling() { - let mut u = UnionFind::<u32>::new(48); - for i in 0..24 { - u.union(i + 1, i); - } - for i in 25..47 { - u.union(i, i + 1); - } - u.union(23, 25); - u.union(24, 23); - let v = u.into_labeling(); - assert!(v.iter().all(|x| *x == v[0])); -} diff --git a/vendor/petgraph/tests/utils/mod.rs b/vendor/petgraph/tests/utils/mod.rs deleted file mode 100644 index 95b9b374..00000000 --- a/vendor/petgraph/tests/utils/mod.rs +++ /dev/null @@ -1,3 +0,0 @@ -mod qc; - -pub use self::qc::*; diff --git a/vendor/petgraph/tests/utils/qc.rs b/vendor/petgraph/tests/utils/qc.rs deleted file mode 100644 index acf22e2b..00000000 --- a/vendor/petgraph/tests/utils/qc.rs +++ /dev/null @@ -1,69 +0,0 @@ -use petgraph::{graph::DiGraph, graphmap::NodeTrait}; -use quickcheck::{Arbitrary, Gen, StdGen}; -use std::ops::Deref; - -#[derive(Copy, Clone, Debug)] -/// quickcheck Arbitrary adaptor - half the size of `T` on average -pub struct Small<T>(pub T); - -impl<T> Deref for Small<T> { - type Target = T; - fn deref(&self) -> &T { - &self.0 - } -} - -impl<T> Arbitrary for Small<T> -where - T: Arbitrary, -{ - fn arbitrary<G: Gen>(g: &mut G) -> Self { - let sz = g.size() / 2; - Small(T::arbitrary(&mut StdGen::new(g, sz))) - } - - fn shrink(&self) -> Box<dyn Iterator<Item = Self>> { - Box::new((**self).shrink().map(Small)) - } -} - -#[cfg(feature = "stable_graph")] -/// A directed graph where each pair of nodes has exactly one edge between them, and no loops. -#[derive(Clone, Debug)] -pub struct Tournament<N, E>(pub DiGraph<N, E>); - -/// `Arbitrary` for `Tournament` creates a graph with arbitrary node count, and exactly one edge of -/// arbitrary direction between each pair of nodes, and no loops. The average node count is reduced, -/// to mitigate the high edge count. -impl<N, E> Arbitrary for Tournament<N, E> -where - N: NodeTrait + Arbitrary, - E: Arbitrary, -{ - fn arbitrary<G: Gen>(g: &mut G) -> Self { - let nodes = usize::arbitrary(g) / 4; - if nodes == 0 { - return Tournament(DiGraph::with_capacity(0, 0)); - } - - let mut gr = DiGraph::new(); - for _ in 0..nodes { - gr.add_node(N::arbitrary(g)); - } - for i in gr.node_indices() { - for j in gr.node_indices() { - if i >= j { - continue; - } - let (source, target) = if bool::arbitrary(g) { (i, j) } else { (j, i) }; - gr.add_edge(source, target, E::arbitrary(g)); - } - } - Tournament(gr) - } - - fn shrink(&self) -> Box<dyn Iterator<Item = Self>> { - let Tournament(gr) = self; - Box::new(gr.shrink().map(Tournament)) - } -} |
