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internal: Migrate remove_unused_param assist to SyntaxEditor

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This commit is contained in:
Giga Bowser 2024-12-04 19:55:16 -05:00
parent 93c9f06870
commit f155aef64d
3 changed files with 71 additions and 17 deletions
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24
crates/syntax/src/algo.rs
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@ -3,8 +3,8 @@
use itertools::Itertools;
use crate::{
AstNode, Direction, NodeOrToken, SyntaxElement, SyntaxKind, SyntaxNode, SyntaxToken, TextRange,
TextSize,
syntax_editor::Element, AstNode, Direction, NodeOrToken, SyntaxElement, SyntaxKind, SyntaxNode,
SyntaxToken, TextRange, TextSize,
};
/// Returns ancestors of the node at the offset, sorted by length. This should
@ -89,6 +89,26 @@ pub fn least_common_ancestor(u: &SyntaxNode, v: &SyntaxNode) -> Option<SyntaxNod
Some(res)
}
pub fn least_common_ancestor_element(u: impl Element, v: impl Element) -> Option<SyntaxNode> {
let u = u.syntax_element();
let v = v.syntax_element();
if u == v {
return match u {
NodeOrToken::Node(node) => Some(node),
NodeOrToken::Token(token) => token.parent(),
};
}
let u_depth = u.ancestors().count();
let v_depth = v.ancestors().count();
let keep = u_depth.min(v_depth);
let u_candidates = u.ancestors().skip(u_depth - keep);
let v_candidates = v.ancestors().skip(v_depth - keep);
let (res, _) = u_candidates.zip(v_candidates).find(|(x, y)| x == y)?;
Some(res)
}
pub fn neighbor<T: AstNode>(me: &T, direction: Direction) -> Option<T> {
me.syntax().siblings(direction).skip(1).find_map(T::cast)
}