| // 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. |
| |
| #![feature(associated_consts)] |
| |
| trait Foo { |
| const X: i32; |
| fn get_x() -> i32 { |
| Self::X |
| } |
| } |
| |
| struct Abc; |
| impl Foo for Abc { |
| const X: i32 = 11; |
| } |
| |
| struct Def; |
| impl Foo for Def { |
| const X: i32 = 97; |
| } |
| |
| fn sub<A: Foo, B: Foo>() -> i32 { |
| A::X - B::X |
| } |
| |
| fn main() { |
| assert_eq!(11, Abc::X); |
| assert_eq!(97, Def::X); |
| assert_eq!(11, Abc::get_x()); |
| assert_eq!(97, Def::get_x()); |
| assert_eq!(-86, sub::<Abc, Def>()); |
| assert_eq!(86, sub::<Def, Abc>()); |
| } |
