| // Copyright 2015 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. |
| |
| // run-pass |
| #![allow(dead_code)] |
| |
| #![feature(specialization)] |
| |
| // Make sure we *can* project non-defaulted associated types |
| // cf compile-fail/specialization-default-projection.rs |
| |
| // First, do so without any use of specialization |
| |
| trait Foo { |
| type Assoc; |
| } |
| |
| impl<T> Foo for T { |
| type Assoc = (); |
| } |
| |
| fn generic_foo<T>() -> <T as Foo>::Assoc { |
| () |
| } |
| |
| // Next, allow for one layer of specialization |
| |
| trait Bar { |
| type Assoc; |
| } |
| |
| impl<T> Bar for T { |
| default type Assoc = (); |
| } |
| |
| impl<T: Clone> Bar for T { |
| type Assoc = u8; |
| } |
| |
| fn generic_bar_clone<T: Clone>() -> <T as Bar>::Assoc { |
| 0u8 |
| } |
| |
| fn main() { |
| } |