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Auto merge of #17925 - darichey:issue-17767, r=Veykril

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Include generics when lowering extern type

Fixes #17767
This commit is contained in:
bors 2024-08-19 07:20:55 +00:00
commit ba973db72a
2 changed files with 21 additions and 5 deletions
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8
crates/hir-ty/src/lower.rs
View file

@ -1976,13 +1976,13 @@ fn type_for_type_alias(db: &dyn HirDatabase, t: TypeAliasId) -> Binders<Ty> {
.with_impl_trait_mode(ImplTraitLoweringMode::Opaque)
.with_type_param_mode(ParamLoweringMode::Variable);
let type_alias_data = db.type_alias_data(t);
if type_alias_data.is_extern {
Binders::empty(Interner, TyKind::Foreign(crate::to_foreign_def_id(t)).intern(Interner))
let inner = if type_alias_data.is_extern {
TyKind::Foreign(crate::to_foreign_def_id(t)).intern(Interner)
} else {
let type_ref = &type_alias_data.type_ref;
let inner = ctx.lower_ty(type_ref.as_deref().unwrap_or(&TypeRef::Error));
ctx.lower_ty(type_ref.as_deref().unwrap_or(&TypeRef::Error))
};
make_binders(db, &generics, inner)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]

16
crates/hir-ty/src/tests/regression.rs
View file

@ -2195,3 +2195,19 @@ impl<'a, T: Deref<Target = impl Trait>> Struct<'a, T> {
"#]],
);
}
#[test]
fn issue_17767() {
check_infer(
r#"
extern "C" {
type Foo<T>;
}
fn f() -> Foo {}
"#,
expect![[r#"
47..49 '{}': Foo
"#]],
);
}