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-rw-r--r--vendor/indexmap/src/set/slice.rs379
1 files changed, 0 insertions, 379 deletions
diff --git a/vendor/indexmap/src/set/slice.rs b/vendor/indexmap/src/set/slice.rs
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index faa9041a..00000000
--- a/vendor/indexmap/src/set/slice.rs
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@@ -1,379 +0,0 @@
-use super::{Bucket, Entries, IndexSet, IntoIter, Iter};
-use crate::util::{slice_eq, try_simplify_range};
-
-use alloc::boxed::Box;
-use alloc::vec::Vec;
-use core::cmp::Ordering;
-use core::fmt;
-use core::hash::{Hash, Hasher};
-use core::ops::{self, Bound, Index, RangeBounds};
-
-/// A dynamically-sized slice of values in an [`IndexSet`].
-///
-/// This supports indexed operations much like a `[T]` slice,
-/// but not any hashed operations on the values.
-///
-/// Unlike `IndexSet`, `Slice` does consider the order for [`PartialEq`]
-/// and [`Eq`], and it also implements [`PartialOrd`], [`Ord`], and [`Hash`].
-#[repr(transparent)]
-pub struct Slice<T> {
- pub(crate) entries: [Bucket<T>],
-}
-
-// SAFETY: `Slice<T>` is a transparent wrapper around `[Bucket<T>]`,
-// and reference lifetimes are bound together in function signatures.
-#[allow(unsafe_code)]
-impl<T> Slice<T> {
- pub(super) const fn from_slice(entries: &[Bucket<T>]) -> &Self {
- unsafe { &*(entries as *const [Bucket<T>] as *const Self) }
- }
-
- pub(super) fn from_boxed(entries: Box<[Bucket<T>]>) -> Box<Self> {
- unsafe { Box::from_raw(Box::into_raw(entries) as *mut Self) }
- }
-
- fn into_boxed(self: Box<Self>) -> Box<[Bucket<T>]> {
- unsafe { Box::from_raw(Box::into_raw(self) as *mut [Bucket<T>]) }
- }
-}
-
-impl<T> Slice<T> {
- pub(crate) fn into_entries(self: Box<Self>) -> Vec<Bucket<T>> {
- self.into_boxed().into_vec()
- }
-
- /// Returns an empty slice.
- pub const fn new<'a>() -> &'a Self {
- Self::from_slice(&[])
- }
-
- /// Return the number of elements in the set slice.
- pub const fn len(&self) -> usize {
- self.entries.len()
- }
-
- /// Returns true if the set slice contains no elements.
- pub const fn is_empty(&self) -> bool {
- self.entries.is_empty()
- }
-
- /// Get a value by index.
- ///
- /// Valid indices are `0 <= index < self.len()`.
- pub fn get_index(&self, index: usize) -> Option<&T> {
- self.entries.get(index).map(Bucket::key_ref)
- }
-
- /// Returns a slice of values in the given range of indices.
- ///
- /// Valid indices are `0 <= index < self.len()`.
- pub fn get_range<R: RangeBounds<usize>>(&self, range: R) -> Option<&Self> {
- let range = try_simplify_range(range, self.entries.len())?;
- self.entries.get(range).map(Self::from_slice)
- }
-
- /// Get the first value.
- pub fn first(&self) -> Option<&T> {
- self.entries.first().map(Bucket::key_ref)
- }
-
- /// Get the last value.
- pub fn last(&self) -> Option<&T> {
- self.entries.last().map(Bucket::key_ref)
- }
-
- /// Divides one slice into two at an index.
- ///
- /// ***Panics*** if `index > len`.
- pub fn split_at(&self, index: usize) -> (&Self, &Self) {
- let (first, second) = self.entries.split_at(index);
- (Self::from_slice(first), Self::from_slice(second))
- }
-
- /// Returns the first value and the rest of the slice,
- /// or `None` if it is empty.
- pub fn split_first(&self) -> Option<(&T, &Self)> {
- if let [first, rest @ ..] = &self.entries {
- Some((&first.key, Self::from_slice(rest)))
- } else {
- None
- }
- }
-
- /// Returns the last value and the rest of the slice,
- /// or `None` if it is empty.
- pub fn split_last(&self) -> Option<(&T, &Self)> {
- if let [rest @ .., last] = &self.entries {
- Some((&last.key, Self::from_slice(rest)))
- } else {
- None
- }
- }
-
- /// Return an iterator over the values of the set slice.
- pub fn iter(&self) -> Iter<'_, T> {
- Iter::new(&self.entries)
- }
-
- /// Search over a sorted set for a value.
- ///
- /// Returns the position where that value is present, or the position where it can be inserted
- /// to maintain the sort. See [`slice::binary_search`] for more details.
- ///
- /// Computes in **O(log(n))** time, which is notably less scalable than looking the value up in
- /// the set this is a slice from using [`IndexSet::get_index_of`], but this can also position
- /// missing values.
- pub fn binary_search(&self, x: &T) -> Result<usize, usize>
- where
- T: Ord,
- {
- self.binary_search_by(|p| p.cmp(x))
- }
-
- /// Search over a sorted set with a comparator function.
- ///
- /// Returns the position where that value is present, or the position where it can be inserted
- /// to maintain the sort. See [`slice::binary_search_by`] for more details.
- ///
- /// Computes in **O(log(n))** time.
- #[inline]
- pub fn binary_search_by<'a, F>(&'a self, mut f: F) -> Result<usize, usize>
- where
- F: FnMut(&'a T) -> Ordering,
- {
- self.entries.binary_search_by(move |a| f(&a.key))
- }
-
- /// Search over a sorted set with an extraction function.
- ///
- /// Returns the position where that value is present, or the position where it can be inserted
- /// to maintain the sort. See [`slice::binary_search_by_key`] for more details.
- ///
- /// Computes in **O(log(n))** time.
- #[inline]
- pub fn binary_search_by_key<'a, B, F>(&'a self, b: &B, mut f: F) -> Result<usize, usize>
- where
- F: FnMut(&'a T) -> B,
- B: Ord,
- {
- self.binary_search_by(|k| f(k).cmp(b))
- }
-
- /// Returns the index of the partition point of a sorted set according to the given predicate
- /// (the index of the first element of the second partition).
- ///
- /// See [`slice::partition_point`] for more details.
- ///
- /// Computes in **O(log(n))** time.
- #[must_use]
- pub fn partition_point<P>(&self, mut pred: P) -> usize
- where
- P: FnMut(&T) -> bool,
- {
- self.entries.partition_point(move |a| pred(&a.key))
- }
-}
-
-impl<'a, T> IntoIterator for &'a Slice<T> {
- type IntoIter = Iter<'a, T>;
- type Item = &'a T;
-
- fn into_iter(self) -> Self::IntoIter {
- self.iter()
- }
-}
-
-impl<T> IntoIterator for Box<Slice<T>> {
- type IntoIter = IntoIter<T>;
- type Item = T;
-
- fn into_iter(self) -> Self::IntoIter {
- IntoIter::new(self.into_entries())
- }
-}
-
-impl<T> Default for &'_ Slice<T> {
- fn default() -> Self {
- Slice::from_slice(&[])
- }
-}
-
-impl<T> Default for Box<Slice<T>> {
- fn default() -> Self {
- Slice::from_boxed(Box::default())
- }
-}
-
-impl<T: Clone> Clone for Box<Slice<T>> {
- fn clone(&self) -> Self {
- Slice::from_boxed(self.entries.to_vec().into_boxed_slice())
- }
-}
-
-impl<T: Copy> From<&Slice<T>> for Box<Slice<T>> {
- fn from(slice: &Slice<T>) -> Self {
- Slice::from_boxed(Box::from(&slice.entries))
- }
-}
-
-impl<T: fmt::Debug> fmt::Debug for Slice<T> {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- f.debug_list().entries(self).finish()
- }
-}
-
-impl<T, U> PartialEq<Slice<U>> for Slice<T>
-where
- T: PartialEq<U>,
-{
- fn eq(&self, other: &Slice<U>) -> bool {
- slice_eq(&self.entries, &other.entries, |b1, b2| b1.key == b2.key)
- }
-}
-
-impl<T, U> PartialEq<[U]> for Slice<T>
-where
- T: PartialEq<U>,
-{
- fn eq(&self, other: &[U]) -> bool {
- slice_eq(&self.entries, other, |b, o| b.key == *o)
- }
-}
-
-impl<T, U> PartialEq<Slice<U>> for [T]
-where
- T: PartialEq<U>,
-{
- fn eq(&self, other: &Slice<U>) -> bool {
- slice_eq(self, &other.entries, |o, b| *o == b.key)
- }
-}
-
-impl<T, U, const N: usize> PartialEq<[U; N]> for Slice<T>
-where
- T: PartialEq<U>,
-{
- fn eq(&self, other: &[U; N]) -> bool {
- <Self as PartialEq<[U]>>::eq(self, other)
- }
-}
-
-impl<T, const N: usize, U> PartialEq<Slice<U>> for [T; N]
-where
- T: PartialEq<U>,
-{
- fn eq(&self, other: &Slice<U>) -> bool {
- <[T] as PartialEq<Slice<U>>>::eq(self, other)
- }
-}
-
-impl<T: Eq> Eq for Slice<T> {}
-
-impl<T: PartialOrd> PartialOrd for Slice<T> {
- fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
- self.iter().partial_cmp(other)
- }
-}
-
-impl<T: Ord> Ord for Slice<T> {
- fn cmp(&self, other: &Self) -> Ordering {
- self.iter().cmp(other)
- }
-}
-
-impl<T: Hash> Hash for Slice<T> {
- fn hash<H: Hasher>(&self, state: &mut H) {
- self.len().hash(state);
- for value in self {
- value.hash(state);
- }
- }
-}
-
-impl<T> Index<usize> for Slice<T> {
- type Output = T;
-
- fn index(&self, index: usize) -> &Self::Output {
- &self.entries[index].key
- }
-}
-
-// We can't have `impl<I: RangeBounds<usize>> Index<I>` because that conflicts with `Index<usize>`.
-// Instead, we repeat the implementations for all the core range types.
-macro_rules! impl_index {
- ($($range:ty),*) => {$(
- impl<T, S> Index<$range> for IndexSet<T, S> {
- type Output = Slice<T>;
-
- fn index(&self, range: $range) -> &Self::Output {
- Slice::from_slice(&self.as_entries()[range])
- }
- }
-
- impl<T> Index<$range> for Slice<T> {
- type Output = Self;
-
- fn index(&self, range: $range) -> &Self::Output {
- Slice::from_slice(&self.entries[range])
- }
- }
- )*}
-}
-impl_index!(
- ops::Range<usize>,
- ops::RangeFrom<usize>,
- ops::RangeFull,
- ops::RangeInclusive<usize>,
- ops::RangeTo<usize>,
- ops::RangeToInclusive<usize>,
- (Bound<usize>, Bound<usize>)
-);
-
-#[cfg(test)]
-mod tests {
- use super::*;
-
- #[test]
- fn slice_index() {
- fn check(vec_slice: &[i32], set_slice: &Slice<i32>, sub_slice: &Slice<i32>) {
- assert_eq!(set_slice as *const _, sub_slice as *const _);
- itertools::assert_equal(vec_slice, set_slice);
- }
-
- let vec: Vec<i32> = (0..10).map(|i| i * i).collect();
- let set: IndexSet<i32> = vec.iter().cloned().collect();
- let slice = set.as_slice();
-
- // RangeFull
- check(&vec[..], &set[..], &slice[..]);
-
- for i in 0usize..10 {
- // Index
- assert_eq!(vec[i], set[i]);
- assert_eq!(vec[i], slice[i]);
-
- // RangeFrom
- check(&vec[i..], &set[i..], &slice[i..]);
-
- // RangeTo
- check(&vec[..i], &set[..i], &slice[..i]);
-
- // RangeToInclusive
- check(&vec[..=i], &set[..=i], &slice[..=i]);
-
- // (Bound<usize>, Bound<usize>)
- let bounds = (Bound::Excluded(i), Bound::Unbounded);
- check(&vec[i + 1..], &set[bounds], &slice[bounds]);
-
- for j in i..=10 {
- // Range
- check(&vec[i..j], &set[i..j], &slice[i..j]);
- }
-
- for j in i..10 {
- // RangeInclusive
- check(&vec[i..=j], &set[i..=j], &slice[i..=j]);
- }
- }
- }
-}
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