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Avoid unnecessary pattern parse errors on ref box

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This commit is contained in:
Esteban Küber 2023-11-29 18:45:36 +00:00
parent cb0863475f
commit 88453aaccf
4 changed files with 5 additions and 27 deletions
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6
compiler/rustc_parse/src/parser/pat.rs
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@ -391,10 +391,10 @@ impl<'a> Parser<'a> {
self.parse_pat_ident_mut(syntax_loc)?
} else if self.eat_keyword(kw::Ref) {
if self.check_keyword(kw::Box) {
// Suggest `box ref` and quit parsing pattern to prevent series of
// misguided diagnostics from later stages of the compiler.
// Suggest `box ref`.
let span = self.prev_token.span.to(self.token.span);
return Err(self.sess.create_err(SwitchRefBoxOrder { span }));
self.bump();
self.sess.emit_err(SwitchRefBoxOrder { span });
}
// Parse ref ident @ pat / ref mut ident @ pat
let mutbl = self.parse_mutability();