1 files changed, 118 insertions, 0 deletions
diff --git a/vendor/logos-codegen/src/leaf.rs b/vendor/logos-codegen/src/leaf.rs
new file mode 100644
index 00000000..5e0b810e
--- /dev/null
+++ b/vendor/logos-codegen/src/leaf.rs
@@ -0,0 +1,118 @@
+use std::cmp::{Ord, Ordering};
+use std::fmt::{self, Debug, Display};
+
+use proc_macro2::{Span, TokenStream};
+use syn::{spanned::Spanned, Ident};
+
+use crate::graph::{Disambiguate, Node};
+use crate::util::MaybeVoid;
+
+#[derive(Clone)]
+pub struct Leaf<'t> {
+    pub ident: Option<&'t Ident>,
+    pub span: Span,
+    pub priority: usize,
+    pub field: MaybeVoid,
+    pub callback: Option<Callback>,
+}
+
+#[derive(Clone)]
+pub enum Callback {
+    Label(TokenStream),
+    Inline(Box<InlineCallback>),
+    Skip(Span),
+}
+
+#[derive(Clone)]
+pub struct InlineCallback {
+    pub arg: Ident,
+    pub body: TokenStream,
+    pub span: Span,
+}
+
+impl From<InlineCallback> for Callback {
+    fn from(inline: InlineCallback) -> Callback {
+        Callback::Inline(Box::new(inline))
+    }
+}
+
+impl Callback {
+    pub fn span(&self) -> Span {
+        match self {
+            Callback::Label(tokens) => tokens.span(),
+            Callback::Inline(inline) => inline.span,
+            Callback::Skip(span) => *span,
+        }
+    }
+}
+
+impl<'t> Leaf<'t> {
+    pub fn new(ident: &'t Ident, span: Span) -> Self {
+        Leaf {
+            ident: Some(ident),
+            span,
+            priority: 0,
+            field: MaybeVoid::Void,
+            callback: None,
+        }
+    }
+
+    pub fn new_skip(span: Span) -> Self {
+        Leaf {
+            ident: None,
+            span,
+            priority: 0,
+            field: MaybeVoid::Void,
+            callback: Some(Callback::Skip(span)),
+        }
+    }
+
+    pub fn callback(mut self, callback: Option<Callback>) -> Self {
+        self.callback = callback;
+        self
+    }
+
+    pub fn field(mut self, field: MaybeVoid) -> Self {
+        self.field = field;
+        self
+    }
+
+    pub fn priority(mut self, priority: usize) -> Self {
+        self.priority = priority;
+        self
+    }
+}
+
+impl Disambiguate for Leaf<'_> {
+    fn cmp(left: &Leaf, right: &Leaf) -> Ordering {
+        Ord::cmp(&left.priority, &right.priority)
+    }
+}
+
+impl<'t> From<Leaf<'t>> for Node<Leaf<'t>> {
+    fn from(leaf: Leaf<'t>) -> Self {
+        Node::Leaf(leaf)
+    }
+}
+
+impl Debug for Leaf<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "::{}", self)?;
+
+        match self.callback {
+            Some(Callback::Label(ref label)) => write!(f, " ({})", label),
+            Some(Callback::Inline(_)) => f.write_str(" (<inline>)"),
+            Some(Callback::Skip(_)) => f.write_str(" (<skip>)"),
+            None => Ok(()),
+        }
+    }
+}
+
+impl Display for Leaf<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self.ident {
+            Some(ident) => Display::fmt(ident, f),
+            None => f.write_str("<skip>"),
+        }
+    }
+}