| // 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. |
| |
| use std::mem::swap; |
| |
| pub fn main() { |
| let mut a: Vec<int> = vec!(0, 1, 2, 3, 4, 5, 6); |
| a.as_mut_slice().swap(2, 4); |
| assert_eq!(*a.get(2), 4); |
| assert_eq!(*a.get(4), 2); |
| let mut n = 42; |
| swap(&mut n, a.get_mut(0)); |
| assert_eq!(*a.get(0), 42); |
| assert_eq!(n, 0); |
| } |
