bjoernager/rust
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Improve error message

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This commit is contained in:
Michael Goulet 2024-06-27 13:07:03 -04:00
parent e8445818d4
commit 32c8bfdb11
8 changed files with 66 additions and 11 deletions
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8
compiler/rustc_parse/src/parser/ty.rs
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@ -989,7 +989,10 @@ impl<'a> Parser<'a> {
leading_token: &Token,
) -> PResult<'a, GenericBound> {
let (mut lifetime_defs, binder_span) = self.parse_late_bound_lifetime_defs()?;
let modifiers_lo = self.token.span;
let modifiers = self.parse_trait_bound_modifiers()?;
let modifiers_span = modifiers_lo.to(self.prev_token.span);
// Recover erroneous lifetime bound with modifiers or binder.
// e.g. `T: for<'a> 'a` or `T: ~const 'a`.
@ -998,6 +1001,11 @@ impl<'a> Parser<'a> {
return self.parse_generic_lt_bound(lo, has_parens);
}
if let (more_lifetime_defs, Some(binder_span)) = self.parse_late_bound_lifetime_defs()? {
lifetime_defs.extend(more_lifetime_defs);
self.dcx().emit_err(errors::BinderBeforeModifiers { binder_span, modifiers_span });
}
let mut path = if self.token.is_keyword(kw::Fn)
&& self.look_ahead(1, |tok| tok.kind == TokenKind::OpenDelim(Delimiter::Parenthesis))
&& let Some(path) = self.recover_path_from_fn()