src/test/run-pass/exterior.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 #![allow(dead_code)]
  12
  13
  14 use std::cell::Cell;
  15
  16 #[derive(Copy, Clone)]
  17 struct Point {x: isize, y: isize, z: isize}
  18
  19 fn f(p: &Cell<Point>) {
  20     assert_eq!(p.get().z, 12);
  21     p.set(Point {x: 10, y: 11, z: 13});
  22     assert_eq!(p.get().z, 13);
  23 }
  24
  25 pub fn main() {
  26     let a: Point = Point {x: 10, y: 11, z: 12};
  27     let b: &Cell<Point> = &Cell::new(a);
  28     assert_eq!(b.get().z, 12);
  29     f(b);
  30     assert_eq!(a.z, 12);
  31     assert_eq!(b.get().z, 13);
  32 }