src/test/ui/issues/issue-20763-2.rs

   1 // build-pass (FIXME(62277): could be check-pass?)
   2 #![allow(dead_code)]
   3 // pretty-expanded FIXME #23616
   4
   5 trait T0 {
   6     type O;
   7     fn dummy(&self) { }
   8 }
   9
  10 struct S<A>(A);
  11 impl<A> T0 for S<A> { type O = A; }
  12
  13 trait T1: T0 {
  14     // this looks okay but as we see below, `f` is unusable
  15     fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool;
  16 }
  17
  18 // complains about mismatched types: <S<A> as T0>::O vs. A
  19 impl<A> T1 for S<A>
  20 {
  21     fn m0<F: Fn(<Self as T0>::O) -> bool>(self, f: F) -> bool { f(self.0) }
  22 }
  23
  24 fn main() { }