src/test/ui/generic-associated-types/gat-in-trait-path.rs

   1 #![feature(generic_associated_types)]
   2   //~^ WARNING: the feature `generic_associated_types` is incomplete
   3 #![feature(associated_type_defaults)]
   4
   5 trait Foo {
   6     type A<'a> where Self: 'a;
   7 }
   8
   9 struct Fooy;
  10
  11 impl Foo for Fooy {
  12     type A<'a> = &'a ();
  13 }
  14
  15 #[derive(Clone)]
  16 struct Fooer<T>(T);
  17
  18 impl<T> Foo for Fooer<T> {
  19     type A<'x> where T: 'x = &'x ();
  20 }
  21
  22 fn f(_arg : Box<dyn for<'a> Foo<A<'a> = &'a ()>>) {}
  23 //~^ the trait `Foo` cannot be made into an object
  24
  25
  26 fn main() {
  27   let foo = Fooer(5);
  28   f(Box::new(foo));
  29 }