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Handle , to ; substitution in arg params

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This commit is contained in:
Esteban Kuber 2022-03-27 06:05:18 +00:00
parent 6874bd27f5
commit 157c67b7a8
4 changed files with 36 additions and 7 deletions
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17
compiler/rustc_parse/src/parser/path.rs
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@ -478,6 +478,23 @@ impl<'a> Parser<'a> {
while let Some(arg) = self.parse_angle_arg(ty_generics)? {
args.push(arg);
if !self.eat(&token::Comma) {
if self.token.kind == token::Semi
&& self.look_ahead(1, |t| t.is_ident() || t.is_lifetime())
{
// Add `>` to the list of expected tokens.
self.check(&token::Gt);
// Handle `,` to `;` substitution
let mut err = self.unexpected::<()>().unwrap_err();
self.bump();
err.span_suggestion_verbose(
self.prev_token.span.until(self.token.span),
"use a comma to separate type parameters",
", ".to_string(),
Applicability::MachineApplicable,
);
err.emit();
continue;
}
if !self.token.kind.should_end_const_arg() {
if self.handle_ambiguous_unbraced_const_arg(&mut args)? {
// We've managed to (partially) recover, so continue trying to parse