1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
12 #![feature(specialization)]
16 pub trait Alpha<T> { }
27 pub struct Parent<A, T>(A, T);
29 impl<A, T> Delta for Parent<A, T>
30 where A: Alpha<T::Handle>,
32 T::Handle: Beta<Event = <Handle as Beta>::Event> {
34 default fn process(&self) {
39 impl<A, T> Delta for Parent<A, T>
40 where A: Alpha<T::Handle> + Alpha<Handle>,
42 T::Handle: Beta<Event = <Handle as Beta>::Event> {
50 impl Beta for Handle {