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review comments: account for generics

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This commit is contained in:
Esteban Küber 2023-01-08 20:51:40 +00:00
parent 147c9bf4d5
commit c6f322bf30
5 changed files with 44 additions and 8 deletions
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8
compiler/rustc_hir_analysis/src/astconv/mod.rs
View File

@ -2147,8 +2147,12 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
.is_accessible_from(self.item_def_id(), tcx)
&& tcx.all_impls(*trait_def_id)
.any(|impl_def_id| {
let trait_ref = tcx.impl_trait_ref(impl_def_id);
trait_ref.map_or(false, |impl_| {
let trait_ref = tcx.bound_impl_trait_ref(impl_def_id);
trait_ref.map_or(false, |trait_ref| {
let impl_ = trait_ref.subst(
tcx,
infcx.fresh_substs_for_item(span, impl_def_id),
);
infcx
.can_eq(
param_env,

14
tests/ui/associated-item/ambiguous-associated-type-with-generics.fixed Normal file
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@ -0,0 +1,14 @@
// run-rustfix
trait Trait<A> {}
trait Assoc {
type Ty;
}
impl<A> Assoc for dyn Trait<A> {
type Ty = i32;
}
fn main() {
let _x: <dyn Trait<i32> as Assoc>::Ty; //~ ERROR ambiguous associated type
}

14
tests/ui/associated-item/ambiguous-associated-type-with-generics.rs Normal file
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@ -0,0 +1,14 @@
// run-rustfix
trait Trait<A> {}
trait Assoc {
type Ty;
}
impl<A> Assoc for dyn Trait<A> {
type Ty = i32;
}
fn main() {
let _x: <dyn Trait<i32>>::Ty; //~ ERROR ambiguous associated type
}

9
tests/ui/associated-item/ambiguous-associated-type-with-generics.stderr Normal file
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@ -0,0 +1,9 @@
error[E0223]: ambiguous associated type
--> $DIR/ambiguous-associated-type-with-generics.rs:13:13
|
LL | let _x: <dyn Trait<i32>>::Ty;
| ^^^^^^^^^^^^^^^^^^^^ help: use the fully-qualified path: `<dyn Trait<i32> as Assoc>::Ty`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0223`.

7
tests/ui/did_you_mean/bad-assoc-ty.stderr
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@ -147,12 +147,7 @@ error[E0223]: ambiguous associated type
--> $DIR/bad-assoc-ty.rs:33:10
|
LL | type H = Fn(u8) -> (u8)::Output;
| ^^^^^^^^^^^^^^^^^^^^^^
|
help: if there were a trait named `Example` with associated type `Output` implemented for `(dyn Fn(u8) -> u8 + 'static)`, you could use the fully-qualified path
|
LL | type H = <(dyn Fn(u8) -> u8 + 'static) as Example>::Output;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| ^^^^^^^^^^^^^^^^^^^^^^ help: use the fully-qualified path: `<(dyn Fn(u8) -> u8 + 'static) as IntoFuture>::Output`
error[E0223]: ambiguous associated type
--> $DIR/bad-assoc-ty.rs:39:19