src/test/ui/type-alias-impl-trait/bounds-are-checked-2.rs

   1 // Make sure that we check that impl trait types implement the traits that they
   2 // claim to.
   3
   4 #![feature(type_alias_impl_trait)]
   5
   6 type X<T> = impl Clone;
   7
   8 fn f<T: Clone>(t: T) -> X<T> {
   9     t
  10     //~^ ERROR the trait bound `T: Clone` is not satisfied
  11 }
  12
  13 fn g<T>(o: Option<X<T>>) -> Option<X<T>> {
  14     o.clone()
  15 }
  16
  17 fn main() {
  18     g(None::<X<&mut ()>>);
  19 }