| // Copyright 2012 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. |
| |
| pub trait MyEq {} |
| |
| pub trait MyNum { |
| fn from_int(isize) -> Self; |
| } |
| |
| pub trait NumExt: MyEq + MyNum { } |
| |
| struct S { v: isize } |
| |
| impl MyEq for S { } |
| |
| impl MyNum for S { |
| fn from_int(i: isize) -> S { |
| S { |
| v: i |
| } |
| } |
| } |
| |
| impl NumExt for S { } |
| |
| fn greater_than_one<T:NumExt>() -> T { MyNum::from_int(1) } |
| |
| pub fn main() { |
| let v: S = greater_than_one(); |
| assert_eq!(v.v, 1); |
| } |
