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//@ check-pass
#![feature(specialization)]
//~^ WARN the feature `specialization` is incomplete
fn main() {}
pub trait Alpha<T> { }
pub trait Beta {
type Event;
}
pub trait Delta {
type Handle;
fn process(&self);
}
pub struct Parent<A, T>(A, T);
impl<A, T> Delta for Parent<A, T>
where A: Alpha<T::Handle>,
T: Delta,
T::Handle: Beta<Event = <Handle as Beta>::Event> {
type Handle = Handle;
default fn process(&self) {
unimplemented!()
}
}
impl<A, T> Delta for Parent<A, T>
where A: Alpha<T::Handle> + Alpha<Handle>,
T: Delta,
T::Handle: Beta<Event = <Handle as Beta>::Event> {
fn process(&self) {
unimplemented!()
}
}
pub struct Handle;
impl Beta for Handle {
type Event = ();
}
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