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Include generics when lowering extern type

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This commit is contained in:
David Richey 2024-08-18 15:09:41 -05:00
parent fa00326247
commit e350bc2cf5
2 changed files with 21 additions and 5 deletions
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10
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_impl_trait_mode(ImplTraitLoweringMode::Opaque)
.with_type_param_mode(ParamLoweringMode::Variable); .with_type_param_mode(ParamLoweringMode::Variable);
let type_alias_data = db.type_alias_data(t); let type_alias_data = db.type_alias_data(t);
if type_alias_data.is_extern { let inner = if type_alias_data.is_extern {
Binders::empty(Interner, TyKind::Foreign(crate::to_foreign_def_id(t)).intern(Interner)) TyKind::Foreign(crate::to_foreign_def_id(t)).intern(Interner)
} else { } else {
let type_ref = &type_alias_data.type_ref; 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) };
} make_binders(db, &generics, inner)
} }
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] #[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
"#]],
);
}