1 files changed, 487 insertions, 0 deletions
diff --git a/vendor/rowan/src/api.rs b/vendor/rowan/src/api.rs
new file mode 100644
index 000000000..605fcc50c
--- /dev/null
+++ b/vendor/rowan/src/api.rs
@@ -0,0 +1,487 @@
+use std::{borrow::Cow, fmt, iter, marker::PhantomData, ops::Range};
+
+use crate::{
+    cursor, green::GreenTokenData, Direction, GreenNode, GreenNodeData, GreenToken, NodeOrToken,
+    SyntaxKind, SyntaxText, TextRange, TextSize, TokenAtOffset, WalkEvent,
+};
+
+pub trait Language: Sized + Copy + fmt::Debug + Eq + Ord + std::hash::Hash {
+    type Kind: Sized + Copy + fmt::Debug + Eq + Ord + std::hash::Hash;
+
+    fn kind_from_raw(raw: SyntaxKind) -> Self::Kind;
+    fn kind_to_raw(kind: Self::Kind) -> SyntaxKind;
+}
+
+#[derive(Clone, PartialEq, Eq, Hash)]
+pub struct SyntaxNode<L: Language> {
+    raw: cursor::SyntaxNode,
+    _p: PhantomData<L>,
+}
+
+#[derive(Clone, PartialEq, Eq, Hash)]
+pub struct SyntaxToken<L: Language> {
+    raw: cursor::SyntaxToken,
+    _p: PhantomData<L>,
+}
+
+pub type SyntaxElement<L> = NodeOrToken<SyntaxNode<L>, SyntaxToken<L>>;
+
+impl<L: Language> fmt::Debug for SyntaxNode<L> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        if f.alternate() {
+            let mut level = 0;
+            for event in self.preorder_with_tokens() {
+                match event {
+                    WalkEvent::Enter(element) => {
+                        for _ in 0..level {
+                            write!(f, "  ")?;
+                        }
+                        match element {
+                            NodeOrToken::Node(node) => writeln!(f, "{:?}", node)?,
+                            NodeOrToken::Token(token) => writeln!(f, "{:?}", token)?,
+                        }
+                        level += 1;
+                    }
+                    WalkEvent::Leave(_) => level -= 1,
+                }
+            }
+            assert_eq!(level, 0);
+            Ok(())
+        } else {
+            write!(f, "{:?}@{:?}", self.kind(), self.text_range())
+        }
+    }
+}
+
+impl<L: Language> fmt::Display for SyntaxNode<L> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(&self.raw, f)
+    }
+}
+
+impl<L: Language> fmt::Debug for SyntaxToken<L> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}@{:?}", self.kind(), self.text_range())?;
+        if self.text().len() < 25 {
+            return write!(f, " {:?}", self.text());
+        }
+        let text = self.text();
+        for idx in 21..25 {
+            if text.is_char_boundary(idx) {
+                let text = format!("{} ...", &text[..idx]);
+                return write!(f, " {:?}", text);
+            }
+        }
+        unreachable!()
+    }
+}
+
+impl<L: Language> fmt::Display for SyntaxToken<L> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(&self.raw, f)
+    }
+}
+
+impl<L: Language> From<SyntaxNode<L>> for SyntaxElement<L> {
+    fn from(node: SyntaxNode<L>) -> SyntaxElement<L> {
+        NodeOrToken::Node(node)
+    }
+}
+
+impl<L: Language> From<SyntaxToken<L>> for SyntaxElement<L> {
+    fn from(token: SyntaxToken<L>) -> SyntaxElement<L> {
+        NodeOrToken::Token(token)
+    }
+}
+
+impl<L: Language> SyntaxNode<L> {
+    pub fn new_root(green: GreenNode) -> SyntaxNode<L> {
+        SyntaxNode::from(cursor::SyntaxNode::new_root(green))
+    }
+    /// Returns a green tree, equal to the green tree this node
+    /// belongs two, except with this node substitute. The complexity
+    /// of operation is proportional to the depth of the tree
+    pub fn replace_with(&self, replacement: GreenNode) -> GreenNode {
+        self.raw.replace_with(replacement)
+    }
+
+    pub fn kind(&self) -> L::Kind {
+        L::kind_from_raw(self.raw.kind())
+    }
+
+    pub fn text_range(&self) -> TextRange {
+        self.raw.text_range()
+    }
+
+    pub fn index(&self) -> usize {
+        self.raw.index()
+    }
+
+    pub fn text(&self) -> SyntaxText {
+        self.raw.text()
+    }
+
+    pub fn green(&self) -> Cow<'_, GreenNodeData> {
+        self.raw.green()
+    }
+
+    pub fn parent(&self) -> Option<SyntaxNode<L>> {
+        self.raw.parent().map(Self::from)
+    }
+
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+        self.raw.ancestors().map(SyntaxNode::from)
+    }
+
+    pub fn children(&self) -> SyntaxNodeChildren<L> {
+        SyntaxNodeChildren { raw: self.raw.children(), _p: PhantomData }
+    }
+
+    pub fn children_with_tokens(&self) -> SyntaxElementChildren<L> {
+        SyntaxElementChildren { raw: self.raw.children_with_tokens(), _p: PhantomData }
+    }
+
+    pub fn first_child(&self) -> Option<SyntaxNode<L>> {
+        self.raw.first_child().map(Self::from)
+    }
+    pub fn last_child(&self) -> Option<SyntaxNode<L>> {
+        self.raw.last_child().map(Self::from)
+    }
+
+    pub fn first_child_or_token(&self) -> Option<SyntaxElement<L>> {
+        self.raw.first_child_or_token().map(NodeOrToken::from)
+    }
+    pub fn last_child_or_token(&self) -> Option<SyntaxElement<L>> {
+        self.raw.last_child_or_token().map(NodeOrToken::from)
+    }
+
+    pub fn next_sibling(&self) -> Option<SyntaxNode<L>> {
+        self.raw.next_sibling().map(Self::from)
+    }
+    pub fn prev_sibling(&self) -> Option<SyntaxNode<L>> {
+        self.raw.prev_sibling().map(Self::from)
+    }
+
+    pub fn next_sibling_or_token(&self) -> Option<SyntaxElement<L>> {
+        self.raw.next_sibling_or_token().map(NodeOrToken::from)
+    }
+    pub fn prev_sibling_or_token(&self) -> Option<SyntaxElement<L>> {
+        self.raw.prev_sibling_or_token().map(NodeOrToken::from)
+    }
+
+    /// Return the leftmost token in the subtree of this node.
+    pub fn first_token(&self) -> Option<SyntaxToken<L>> {
+        self.raw.first_token().map(SyntaxToken::from)
+    }
+    /// Return the rightmost token in the subtree of this node.
+    pub fn last_token(&self) -> Option<SyntaxToken<L>> {
+        self.raw.last_token().map(SyntaxToken::from)
+    }
+
+    pub fn siblings(&self, direction: Direction) -> impl Iterator<Item = SyntaxNode<L>> {
+        self.raw.siblings(direction).map(SyntaxNode::from)
+    }
+
+    pub fn siblings_with_tokens(
+        &self,
+        direction: Direction,
+    ) -> impl Iterator<Item = SyntaxElement<L>> {
+        self.raw.siblings_with_tokens(direction).map(SyntaxElement::from)
+    }
+
+    pub fn descendants(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+        self.raw.descendants().map(SyntaxNode::from)
+    }
+
+    pub fn descendants_with_tokens(&self) -> impl Iterator<Item = SyntaxElement<L>> {
+        self.raw.descendants_with_tokens().map(NodeOrToken::from)
+    }
+
+    /// Traverse the subtree rooted at the current node (including the current
+    /// node) in preorder, excluding tokens.
+    pub fn preorder(&self) -> Preorder<L> {
+        Preorder { raw: self.raw.preorder(), _p: PhantomData }
+    }
+
+    /// Traverse the subtree rooted at the current node (including the current
+    /// node) in preorder, including tokens.
+    pub fn preorder_with_tokens(&self) -> PreorderWithTokens<L> {
+        PreorderWithTokens { raw: self.raw.preorder_with_tokens(), _p: PhantomData }
+    }
+
+    /// Find a token in the subtree corresponding to this node, which covers the offset.
+    /// Precondition: offset must be withing node's range.
+    pub fn token_at_offset(&self, offset: TextSize) -> TokenAtOffset<SyntaxToken<L>> {
+        self.raw.token_at_offset(offset).map(SyntaxToken::from)
+    }
+
+    /// Return the deepest node or token in the current subtree that fully
+    /// contains the range. If the range is empty and is contained in two leaf
+    /// nodes, either one can be returned. Precondition: range must be contained
+    /// withing the current node
+    pub fn covering_element(&self, range: TextRange) -> SyntaxElement<L> {
+        NodeOrToken::from(self.raw.covering_element(range))
+    }
+
+    /// Finds a [`SyntaxElement`] which intersects with a given `range`. If
+    /// there are several intersecting elements, any one can be returned.
+    ///
+    /// The method uses binary search internally, so it's complexity is
+    /// `O(log(N))` where `N = self.children_with_tokens().count()`.
+    pub fn child_or_token_at_range(&self, range: TextRange) -> Option<SyntaxElement<L>> {
+        self.raw.child_or_token_at_range(range).map(SyntaxElement::from)
+    }
+
+    /// Returns an independent copy of the subtree rooted at this node.
+    ///
+    /// The parent of the returned node will be `None`, the start offset will be
+    /// zero, but, otherwise, it'll be equivalent to the source node.
+    pub fn clone_subtree(&self) -> SyntaxNode<L> {
+        SyntaxNode::from(self.raw.clone_subtree())
+    }
+
+    pub fn clone_for_update(&self) -> SyntaxNode<L> {
+        SyntaxNode::from(self.raw.clone_for_update())
+    }
+
+    pub fn detach(&self) {
+        self.raw.detach()
+    }
+
+    pub fn splice_children(&self, to_delete: Range<usize>, to_insert: Vec<SyntaxElement<L>>) {
+        let to_insert = to_insert.into_iter().map(cursor::SyntaxElement::from).collect::<Vec<_>>();
+        self.raw.splice_children(to_delete, to_insert)
+    }
+}
+
+impl<L: Language> SyntaxToken<L> {
+    /// Returns a green tree, equal to the green tree this token
+    /// belongs two, except with this token substitute. The complexity
+    /// of operation is proportional to the depth of the tree
+    pub fn replace_with(&self, new_token: GreenToken) -> GreenNode {
+        self.raw.replace_with(new_token)
+    }
+
+    pub fn kind(&self) -> L::Kind {
+        L::kind_from_raw(self.raw.kind())
+    }
+
+    pub fn text_range(&self) -> TextRange {
+        self.raw.text_range()
+    }
+
+    pub fn index(&self) -> usize {
+        self.raw.index()
+    }
+
+    pub fn text(&self) -> &str {
+        self.raw.text()
+    }
+
+    pub fn green(&self) -> &GreenTokenData {
+        self.raw.green()
+    }
+
+    pub fn parent(&self) -> Option<SyntaxNode<L>> {
+        self.raw.parent().map(SyntaxNode::from)
+    }
+
+    /// Iterator over all the ancestors of this token excluding itself.
+    #[deprecated = "use `SyntaxToken::parent_ancestors` instead"]
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+        self.parent_ancestors()
+    }
+
+    /// Iterator over all the ancestors of this token excluding itself.
+    pub fn parent_ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+        self.raw.ancestors().map(SyntaxNode::from)
+    }
+
+    pub fn next_sibling_or_token(&self) -> Option<SyntaxElement<L>> {
+        self.raw.next_sibling_or_token().map(NodeOrToken::from)
+    }
+    pub fn prev_sibling_or_token(&self) -> Option<SyntaxElement<L>> {
+        self.raw.prev_sibling_or_token().map(NodeOrToken::from)
+    }
+
+    pub fn siblings_with_tokens(
+        &self,
+        direction: Direction,
+    ) -> impl Iterator<Item = SyntaxElement<L>> {
+        self.raw.siblings_with_tokens(direction).map(SyntaxElement::from)
+    }
+
+    /// Next token in the tree (i.e, not necessary a sibling).
+    pub fn next_token(&self) -> Option<SyntaxToken<L>> {
+        self.raw.next_token().map(SyntaxToken::from)
+    }
+    /// Previous token in the tree (i.e, not necessary a sibling).
+    pub fn prev_token(&self) -> Option<SyntaxToken<L>> {
+        self.raw.prev_token().map(SyntaxToken::from)
+    }
+
+    pub fn detach(&self) {
+        self.raw.detach()
+    }
+}
+
+impl<L: Language> SyntaxElement<L> {
+    pub fn text_range(&self) -> TextRange {
+        match self {
+            NodeOrToken::Node(it) => it.text_range(),
+            NodeOrToken::Token(it) => it.text_range(),
+        }
+    }
+
+    pub fn index(&self) -> usize {
+        match self {
+            NodeOrToken::Node(it) => it.index(),
+            NodeOrToken::Token(it) => it.index(),
+        }
+    }
+
+    pub fn kind(&self) -> L::Kind {
+        match self {
+            NodeOrToken::Node(it) => it.kind(),
+            NodeOrToken::Token(it) => it.kind(),
+        }
+    }
+
+    pub fn parent(&self) -> Option<SyntaxNode<L>> {
+        match self {
+            NodeOrToken::Node(it) => it.parent(),
+            NodeOrToken::Token(it) => it.parent(),
+        }
+    }
+
+    pub fn ancestors(&self) -> impl Iterator<Item = SyntaxNode<L>> {
+        let first = match self {
+            NodeOrToken::Node(it) => Some(it.clone()),
+            NodeOrToken::Token(it) => it.parent(),
+        };
+        iter::successors(first, SyntaxNode::parent)
+    }
+
+    pub fn next_sibling_or_token(&self) -> Option<SyntaxElement<L>> {
+        match self {
+            NodeOrToken::Node(it) => it.next_sibling_or_token(),
+            NodeOrToken::Token(it) => it.next_sibling_or_token(),
+        }
+    }
+    pub fn prev_sibling_or_token(&self) -> Option<SyntaxElement<L>> {
+        match self {
+            NodeOrToken::Node(it) => it.prev_sibling_or_token(),
+            NodeOrToken::Token(it) => it.prev_sibling_or_token(),
+        }
+    }
+    pub fn detach(&self) {
+        match self {
+            NodeOrToken::Node(it) => it.detach(),
+            NodeOrToken::Token(it) => it.detach(),
+        }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct SyntaxNodeChildren<L: Language> {
+    raw: cursor::SyntaxNodeChildren,
+    _p: PhantomData<L>,
+}
+
+impl<L: Language> Iterator for SyntaxNodeChildren<L> {
+    type Item = SyntaxNode<L>;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.raw.next().map(SyntaxNode::from)
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct SyntaxElementChildren<L: Language> {
+    raw: cursor::SyntaxElementChildren,
+    _p: PhantomData<L>,
+}
+
+impl<L: Language> Iterator for SyntaxElementChildren<L> {
+    type Item = SyntaxElement<L>;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.raw.next().map(NodeOrToken::from)
+    }
+}
+
+pub struct Preorder<L: Language> {
+    raw: cursor::Preorder,
+    _p: PhantomData<L>,
+}
+
+impl<L: Language> Preorder<L> {
+    pub fn skip_subtree(&mut self) {
+        self.raw.skip_subtree()
+    }
+}
+
+impl<L: Language> Iterator for Preorder<L> {
+    type Item = WalkEvent<SyntaxNode<L>>;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.raw.next().map(|it| it.map(SyntaxNode::from))
+    }
+}
+
+pub struct PreorderWithTokens<L: Language> {
+    raw: cursor::PreorderWithTokens,
+    _p: PhantomData<L>,
+}
+
+impl<L: Language> PreorderWithTokens<L> {
+    pub fn skip_subtree(&mut self) {
+        self.raw.skip_subtree()
+    }
+}
+
+impl<L: Language> Iterator for PreorderWithTokens<L> {
+    type Item = WalkEvent<SyntaxElement<L>>;
+    fn next(&mut self) -> Option<Self::Item> {
+        self.raw.next().map(|it| it.map(SyntaxElement::from))
+    }
+}
+
+impl<L: Language> From<cursor::SyntaxNode> for SyntaxNode<L> {
+    fn from(raw: cursor::SyntaxNode) -> SyntaxNode<L> {
+        SyntaxNode { raw, _p: PhantomData }
+    }
+}
+
+impl<L: Language> From<SyntaxNode<L>> for cursor::SyntaxNode {
+    fn from(node: SyntaxNode<L>) -> cursor::SyntaxNode {
+        node.raw
+    }
+}
+
+impl<L: Language> From<cursor::SyntaxToken> for SyntaxToken<L> {
+    fn from(raw: cursor::SyntaxToken) -> SyntaxToken<L> {
+        SyntaxToken { raw, _p: PhantomData }
+    }
+}
+
+impl<L: Language> From<SyntaxToken<L>> for cursor::SyntaxToken {
+    fn from(token: SyntaxToken<L>) -> cursor::SyntaxToken {
+        token.raw
+    }
+}
+
+impl<L: Language> From<cursor::SyntaxElement> for SyntaxElement<L> {
+    fn from(raw: cursor::SyntaxElement) -> SyntaxElement<L> {
+        match raw {
+            NodeOrToken::Node(it) => NodeOrToken::Node(it.into()),
+            NodeOrToken::Token(it) => NodeOrToken::Token(it.into()),
+        }
+    }
+}
+
+impl<L: Language> From<SyntaxElement<L>> for cursor::SyntaxElement {
+    fn from(element: SyntaxElement<L>) -> cursor::SyntaxElement {
+        match element {
+            NodeOrToken::Node(it) => NodeOrToken::Node(it.into()),
+            NodeOrToken::Token(it) => NodeOrToken::Token(it.into()),
+        }
+    }
+}