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Rollup merge of #95200 - TaKO8Ki:cancel-not-emitted-error-when-parsing-generic-arg, r=oli-obk

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Cancel a not emitted error after parsing const generic args

closes #95163
This commit is contained in:
Dylan DPC 2022-03-22 19:07:36 +01:00 committed by GitHub
commit 5d3dfb446f
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3 changed files with 21 additions and 4 deletions
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8
compiler/rustc_parse/src/parser/path.rs
View File

@ -630,11 +630,15 @@ impl<'a> Parser<'a> {
Ok(ty) => GenericArg::Type(ty),
Err(err) => {
if is_const_fn {
if let Ok(expr) = (*snapshot).parse_expr_res(Restrictions::CONST_EXPR, None)
{
match (*snapshot).parse_expr_res(Restrictions::CONST_EXPR, None) {
Ok(expr) => {
self.restore_snapshot(snapshot);
return Ok(Some(self.dummy_const_arg_needs_braces(err, expr.span)));
}
Err(err) => {
err.cancel();
}
}
}
// Try to recover from possible `const` arg without braces.
return self.recover_const_arg(start, err).map(Some);

5
src/test/ui/const-generics/ice-const-generic-function-return-ty.rs Normal file
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@ -0,0 +1,5 @@
// #95163
fn return_ty() -> impl Into<<() as Reexported;
//~^ ERROR expected one of `(`, `::`, `<`, or `>`, found `;`
fn main() {}

8
src/test/ui/const-generics/ice-const-generic-function-return-ty.stderr Normal file
View File

@ -0,0 +1,8 @@
error: expected one of `(`, `::`, `<`, or `>`, found `;`
--> $DIR/ice-const-generic-function-return-ty.rs:2:46
|
LL | fn return_ty() -> impl Into<<() as Reexported;
| ^ expected one of `(`, `::`, `<`, or `>`
error: aborting due to previous error