tests/ui/specialization/issue-35376.rs

   1 // check-pass
   2 #![feature(specialization)]
   3 //~^ WARN the feature `specialization` is incomplete
   4
   5 fn main() {}
   6
   7 pub trait Alpha<T> { }
   8
   9 pub trait Beta {
  10     type Event;
  11 }
  12
  13 pub trait Delta {
  14     type Handle;
  15     fn process(&self);
  16 }
  17
  18 pub struct Parent<A, T>(A, T);
  19
  20 impl<A, T> Delta for Parent<A, T>
  21 where A: Alpha<T::Handle>,
  22       T: Delta,
  23       T::Handle: Beta<Event = <Handle as Beta>::Event> {
  24     type Handle = Handle;
  25     default fn process(&self) {
  26         unimplemented!()
  27     }
  28 }
  29
  30 impl<A, T> Delta for Parent<A, T>
  31 where A: Alpha<T::Handle> + Alpha<Handle>,
  32       T: Delta,
  33       T::Handle: Beta<Event = <Handle as Beta>::Event> {
  34       fn process(&self) {
  35         unimplemented!()
  36       }
  37 }
  38
  39 pub struct Handle;
  40
  41 impl Beta for Handle {
  42     type Event = ();
  43 }