src/test/ui/lint/lint-ctypes-73249-3.rs

   1 #![feature(type_alias_impl_trait)]
   2 #![deny(improper_ctypes)]
   3
   4 pub trait Baz { }
   5
   6 impl Baz for u32 { }
   7
   8 type Qux = impl Baz;
   9
  10 fn assign() -> Qux { 3 }
  11
  12 #[repr(C)]
  13 pub struct A {
  14     x: Qux,
  15 }
  16
  17 extern "C" {
  18     pub fn lint_me() -> A; //~ ERROR: uses type `impl Baz`
  19 }
  20
  21 fn main() {}