| // 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. |
| |
| |
| trait Panda<T> { |
| fn chomp(&self, bamboo: &T) -> T; |
| } |
| |
| trait Add<RHS,Result>: Panda<RHS> { |
| fn add(&self, rhs: &RHS) -> Result; |
| } |
| |
| trait MyNum : Sized + Add<Self,Self> { } |
| |
| struct MyInt { val: isize } |
| |
| impl Panda<MyInt> for MyInt { |
| fn chomp(&self, bamboo: &MyInt) -> MyInt { |
| mi(self.val + bamboo.val) |
| } |
| } |
| |
| impl Add<MyInt, MyInt> for MyInt { |
| fn add(&self, other: &MyInt) -> MyInt { self.chomp(other) } |
| } |
| |
| impl MyNum for MyInt {} |
| |
| fn f<T:MyNum>(x: T, y: T) -> T { |
| return x.add(&y).chomp(&y); |
| } |
| |
| fn mi(v: isize) -> MyInt { MyInt { val: v } } |
| |
| pub fn main() { |
| let (x, y) = (mi(3), mi(5)); |
| let z = f(x, y); |
| assert_eq!(z.val, 13); |
| } |