src/test/ui/run-pass/unique/unique-swap.rs

   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 // run-pass
  12 #![feature(box_syntax)]
  13
  14 use std::mem::swap;
  15
  16 pub fn main() {
  17     let mut i: Box<_> = box 100;
  18     let mut j: Box<_> = box 200;
  19     swap(&mut i, &mut j);
  20     assert_eq!(i, box 200);
  21     assert_eq!(j, box 100);
  22 }