diff options
Diffstat (limited to 'src/test/ui/lint/lint-ctypes-73251-2.rs')
-rw-r--r-- | src/test/ui/lint/lint-ctypes-73251-2.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/lint/lint-ctypes-73251-2.rs b/src/test/ui/lint/lint-ctypes-73251-2.rs new file mode 100644 index 000000000..df71a9457 --- /dev/null +++ b/src/test/ui/lint/lint-ctypes-73251-2.rs @@ -0,0 +1,39 @@ +#![feature(type_alias_impl_trait)] +#![deny(improper_ctypes)] + +pub trait TraitA { + type Assoc; +} + +impl TraitA for u32 { + type Assoc = u32; +} + +pub trait TraitB { + type Assoc; +} + +impl<T> TraitB for T +where + T: TraitA, +{ + type Assoc = <T as TraitA>::Assoc; +} + +type AliasA = impl TraitA<Assoc = u32>; + +type AliasB = impl TraitB<Assoc = AliasA>; + +fn use_of_a() -> AliasA { + 3 +} + +fn use_of_b() -> AliasB { + 3 +} + +extern "C" { + pub fn lint_me() -> <AliasB as TraitB>::Assoc; //~ ERROR: uses type `AliasA` +} + +fn main() {} |