| // 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. |
| |
| trait ToRef<'a> { |
| type Ref: 'a; |
| } |
| |
| impl<'a, U: 'a> ToRef<'a> for U { |
| type Ref = &'a U; |
| } |
| |
| fn example<'a, T>(value: &'a T) -> (<T as ToRef<'a>>::Ref, u32) { |
| (value, 0) |
| } |
| |
| fn main() { |
| example(&0); |
| } |
