src/test/run-pass/assign-assign.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 // Issue 483 - Assignment expressions result in nil
  12 fn test_assign() {
  13     let mut x: int;
  14     let y: () = x = 10;
  15     assert_eq!(x, 10);
  16     assert_eq!(y, ());
  17     let mut z = x = 11;
  18     assert_eq!(x, 11);
  19     assert_eq!(z, ());
  20     z = x = 12;
  21     assert_eq!(x, 12);
  22     assert_eq!(z, ());
  23 }
  24
  25 fn test_assign_op() {
  26     let mut x: int = 0;
  27     let y: () = x += 10;
  28     assert_eq!(x, 10);
  29     assert_eq!(y, ());
  30     let mut z = x += 11;
  31     assert_eq!(x, 21);
  32     assert_eq!(z, ());
  33     z = x += 12;
  34     assert_eq!(x, 33);
  35     assert_eq!(z, ());
  36 }
  37
  38 pub fn main() { test_assign(); test_assign_op(); }