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Recover from c++ style enum struct

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new error message: `enum` and `struct` are mutually exclusive
new suggestion: replace `enum struct` with `enum`
This commit is contained in:
Obei Sideg 2022-07-27 02:07:07 +03:00
parent c11207ec89
commit 254b89d209
1 changed files with 19 additions and 0 deletions
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19
compiler/rustc_parse/src/parser/item.rs
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@ -1216,6 +1216,25 @@ impl<'a> Parser<'a> {
/// Parses an enum declaration.
fn parse_item_enum(&mut self) -> PResult<'a, ItemInfo> {
if self.token.is_keyword(kw::Struct) {
let mut err = self.struct_span_err(
self.prev_token.span.to(self.token.span),
"`enum` and `struct` are mutually exclusive",
);
err.span_suggestion(
self.prev_token.span.to(self.token.span),
"replace `enum struct` with",
"enum",
Applicability::MachineApplicable,
);
if self.look_ahead(1, |t| t.is_ident()) {
self.bump();
err.emit();
} else {
return Err(err);
}
}
let id = self.parse_ident()?;
let mut generics = self.parse_generics()?;
generics.where_clause = self.parse_where_clause()?;