| // 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. |
| |
| trait TheTrait : TheSuperTrait<<Self as TheTrait>::Item> { |
| type Item; |
| } |
| |
| trait TheSuperTrait<T> { |
| fn get(&self) -> T; |
| } |
| |
| impl TheTrait for i32 { |
| type Item = u32; |
| } |
| |
| impl TheSuperTrait<u32> for i32 { |
| fn get(&self) -> u32 { |
| *self as u32 |
| } |
| } |
| |
| fn foo<T:TheTrait<Item=u32>>(t: &T) -> u32 { |
| t.get() |
| } |
| |
| fn main() { |
| foo::<i32>(&22); |
| } |