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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 | ||
c34b1796 | 11 | |
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12 | pub trait Add<RHS,Result> { |
13 | fn add(&self, rhs: &RHS) -> Result; | |
14 | } | |
15 | ||
16 | trait MyNum : Add<Self,Self> { } | |
17 | ||
c34b1796 | 18 | struct MyInt { val: isize } |
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19 | |
20 | impl Add<MyInt, MyInt> for MyInt { | |
21 | fn add(&self, other: &MyInt) -> MyInt { mi(self.val + other.val) } | |
22 | } | |
23 | ||
1a4d82fc | 24 | impl MyNum for MyInt {} |
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25 | |
26 | fn f<T:MyNum>(x: T, y: T) -> T { | |
27 | return x.add(&y); | |
28 | } | |
29 | ||
c34b1796 | 30 | fn mi(v: isize) -> MyInt { MyInt { val: v } } |
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31 | |
32 | pub fn main() { | |
33 | let (x, y) = (mi(3), mi(5)); | |
34 | let z = f(x, y); | |
35 | assert!(z.val == 8) | |
36 | } |