| // Copyright 2014 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. |
| |
| // Test that we can overload the `+` operator for points so that two |
| // points can be added, and a point can be added to an integer. |
| |
| use std::ops; |
| |
| #[derive(Debug,PartialEq,Eq)] |
| struct Point { |
| x: isize, |
| y: isize |
| } |
| |
| impl ops::Add for Point { |
| type Output = Point; |
| |
| fn add(self, other: Point) -> Point { |
| Point {x: self.x + other.x, y: self.y + other.y} |
| } |
| } |
| |
| impl ops::Add<isize> for Point { |
| type Output = Point; |
| |
| fn add(self, other: isize) -> Point { |
| Point {x: self.x + other, |
| y: self.y + other} |
| } |
| } |
| |
| pub fn main() { |
| let mut p = Point {x: 10, y: 20}; |
| p = p + Point {x: 101, y: 102}; |
| assert_eq!(p, Point {x: 111, y: 122}); |
| p = p + 1; |
| assert_eq!(p, Point {x: 112, y: 123}); |
| } |