bjoernager/rust
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Use TokenKind::similar_tokens()

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This commit is contained in:
Fabian Wolff 2021-10-04 22:13:00 +02:00
parent cf19131cb3
commit 079c075f24
2 changed files with 5 additions and 1 deletions
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1
compiler/rustc_ast/src/token.rs
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@ -295,6 +295,7 @@ impl TokenKind {
match *self { match *self {
Comma => Some(vec![Dot, Lt, Semi]), Comma => Some(vec![Dot, Lt, Semi]),
Semi => Some(vec![Colon, Comma]), Semi => Some(vec![Colon, Comma]),
FatArrow => Some(vec![Eq, RArrow]),
_ => None, _ => None,
} }
} }

5
compiler/rustc_parse/src/parser/expr.rs
View file

@ -2324,7 +2324,10 @@ impl<'a> Parser<'a> {
let arrow_span = this.token.span; let arrow_span = this.token.span;
if let Err(mut err) = this.expect(&token::FatArrow) { if let Err(mut err) = this.expect(&token::FatArrow) {
// We might have a `=>` -> `=` or `->` typo (issue #89396). // We might have a `=>` -> `=` or `->` typo (issue #89396).
if let token::Eq | token::RArrow = this.token.kind { if TokenKind::FatArrow
.similar_tokens()
.map_or(false, |similar_tokens| similar_tokens.contains(&this.token.kind))
{
err.span_suggestion( err.span_suggestion(
this.token.span, this.token.span,
"try using a fat arrow here", "try using a fat arrow here",