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1 | // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
11 | pub trait Add<RHS,Result> { | |
12 | fn add(&self, rhs: &RHS) -> Result; | |
13 | } | |
14 | ||
15 | trait MyNum : Add<Self,Self> { } | |
16 | ||
17 | struct MyInt { val: int } | |
18 | ||
19 | impl Add<MyInt, MyInt> for MyInt { | |
20 | fn add(&self, other: &MyInt) -> MyInt { mi(self.val + other.val) } | |
21 | } | |
22 | ||
23 | impl MyNum for MyInt; | |
24 | ||
25 | fn f<T:MyNum>(x: T, y: T) -> T { | |
26 | return x.add(&y); | |
27 | } | |
28 | ||
29 | fn mi(v: int) -> MyInt { MyInt { val: v } } | |
30 | ||
31 | pub fn main() { | |
32 | let (x, y) = (mi(3), mi(5)); | |
33 | let z = f(x, y); | |
34 | assert!(z.val == 8) | |
35 | } | |
36 |