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Merge #5047

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5047: matching brace works for | in lambdas r=matklad a=matklad



bors r+
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Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>
This commit is contained in:
bors[bot] 2020-06-25 06:50:18 +00:00 committed by GitHub
commit fb70eb6e21
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1 changed files with 22 additions and 5 deletions
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27
crates/ra_ide/src/matching_brace.rs
View file

@ -1,8 +1,12 @@
use ra_syntax::{ast::AstNode, SourceFile, SyntaxKind, TextSize, T};
use ra_syntax::{
ast::{self, AstNode},
SourceFile, SyntaxKind, TextSize, T,
};
use test_utils::mark;
// Feature: Matching Brace
//
// If the cursor is on any brace (`<>(){}[]`) which is a part of a brace-pair,
// If the cursor is on any brace (`<>(){}[]||`) which is a part of a brace-pair,
// moves cursor to the matching brace. It uses the actual parser to determine
// braces, so it won't confuse generics with comparisons.
//
@ -13,8 +17,8 @@ use ra_syntax::{ast::AstNode, SourceFile, SyntaxKind, TextSize, T};
// |===
pub fn matching_brace(file: &SourceFile, offset: TextSize) -> Option<TextSize> {
const BRACES: &[SyntaxKind] =
&[T!['{'], T!['}'], T!['['], T![']'], T!['('], T![')'], T![<], T![>]];
let (brace_node, brace_idx) = file
&[T!['{'], T!['}'], T!['['], T![']'], T!['('], T![')'], T![<], T![>], T![|], T![|]];
let (brace_token, brace_idx) = file
.syntax()
.token_at_offset(offset)
.filter_map(|node| {
@ -22,7 +26,11 @@ pub fn matching_brace(file: &SourceFile, offset: TextSize) -> Option<TextSize> {
Some((node, idx))
})
.next()?;
let parent = brace_node.parent();
let parent = brace_token.parent();
if brace_token.kind() == T![|] && !ast::ParamList::can_cast(parent.kind()) {
mark::hit!(pipes_not_braces);
return None;
}
let matching_kind = BRACES[brace_idx ^ 1];
let matching_node = parent.children_with_tokens().find(|node| node.kind() == matching_kind)?;
Some(matching_node.text_range().start())
@ -48,5 +56,14 @@ mod tests {
}
do_check("struct Foo { a: i32, }<|>", "struct Foo <|>{ a: i32, }");
do_check("fn main() { |x: i32|<|> x * 2;}", "fn main() { <|>|x: i32| x * 2;}");
{
mark::check!(pipes_not_braces);
do_check(
"fn main() { match 92 { 1 | 2 |<|> 3 => 92 } }",
"fn main() { match 92 { 1 | 2 |<|> 3 => 92 } }",
);
}
}
}