// 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. use std::cmp::Eq; pub trait MyNum : Add + Sub + Mul + Eq { } pub struct MyInt { val: int } impl Add for MyInt { fn add(&self, other: &MyInt) -> MyInt { mi(self.val + other.val) } } impl Sub for MyInt { fn sub(&self, other: &MyInt) -> MyInt { mi(self.val - other.val) } } impl Mul for MyInt { fn mul(&self, other: &MyInt) -> MyInt { mi(self.val * other.val) } } impl Eq for MyInt { fn eq(&self, other: &MyInt) -> bool { self.val == other.val } fn ne(&self, other: &MyInt) -> bool { !self.eq(other) } } impl MyNum for MyInt {} fn mi(v: int) -> MyInt { MyInt { val: v } }