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Stop failing eagerly, and collect all opaque types even if some are erroneous.

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This commit is contained in:
Oli Scherer 2023-06-15 15:40:31 +00:00
parent 326a9fa8e8
commit 41881aece2
3 changed files with 7 additions and 31 deletions
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18
compiler/rustc_ty_utils/src/opaque_types.rs
View File

@ -1,5 +1,4 @@
use rustc_data_structures::fx::FxHashSet;
use rustc_errors::ErrorGuaranteed;
use rustc_hir::{def::DefKind, def_id::LocalDefId};
use rustc_middle::query::Providers;
use rustc_middle::ty::util::{CheckRegions, NotUniqueParam};
@ -65,10 +64,9 @@ impl<'tcx> OpaqueTypeCollector<'tcx> {
}
impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for OpaqueTypeCollector<'tcx> {
type BreakTy = ErrorGuaranteed;
#[instrument(skip(self), ret, level = "trace")]
fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<ErrorGuaranteed> {
fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<!> {
t.super_visit_with(self)?;
match t.kind() {
ty::Alias(ty::Opaque, alias_ty) if alias_ty.def_id.is_local() => {
if !self.seen.insert(alias_ty.def_id.expect_local()) {
@ -91,24 +89,20 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for OpaqueTypeCollector<'tcx> {
trace!(?pred);
self.visit_spanned(span, pred);
}
ControlFlow::Continue(())
}
Err(NotUniqueParam::NotParam(arg)) => {
let err = self.tcx.sess.emit_err(NotParam {
self.tcx.sess.emit_err(NotParam {
arg,
span: self.span(),
opaque_span: self.tcx.def_span(alias_ty.def_id),
});
ControlFlow::Break(err)
}
Err(NotUniqueParam::DuplicateParam(arg)) => {
let err = self.tcx.sess.emit_err(DuplicateArg {
self.tcx.sess.emit_err(DuplicateArg {
arg,
span: self.span(),
opaque_span: self.tcx.def_span(alias_ty.def_id),
});
ControlFlow::Break(err)
}
}
}
@ -157,10 +151,10 @@ impl<'tcx> TypeVisitor<TyCtxt<'tcx>> for OpaqueTypeCollector<'tcx> {
}
}
}
t.super_visit_with(self)
}
_ => t.super_visit_with(self),
_ => {}
}
ControlFlow::Continue(())
}
}

1
tests/ui/type-alias-impl-trait/multi-error.rs
View File

@ -18,7 +18,6 @@ impl Foo for () {
//~^ ERROR non-defining opaque type use
((), ())
//~^ ERROR mismatched types
//~| ERROR mismatched types
}
}

19
tests/ui/type-alias-impl-trait/multi-error.stderr
View File

@ -27,23 +27,6 @@ note: this item must have the opaque type in its signature in order to be able t
LL | fn foo() -> (Self::Bar<u32>, Self::Baz) {
| ^^^
error[E0308]: mismatched types
--> $DIR/multi-error.rs:19:14
|
LL | type Baz = impl Sized;
| ---------- the expected opaque type
...
LL | ((), ())
| ^^ expected opaque type, found `()`
|
= note: expected opaque type `<() as Foo>::Baz`
found unit type `()`
note: this item must have the opaque type in its signature in order to be able to register hidden types
--> $DIR/multi-error.rs:17:8
|
LL | fn foo() -> (Self::Bar<u32>, Self::Baz) {
| ^^^
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0308`.