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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// compile-pass
#![feature(specialization)]
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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