| // 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. |
| |
| #[cfg(feature = "use_core")] |
| extern crate core; |
| |
| use std::cell::Cell; |
| |
| #[macro_use] |
| extern crate derivative; |
| |
| #[derive(Derivative)] |
| #[derivative(Copy, Clone)] |
| struct Point {x: isize, y: isize, z: isize} |
| |
| fn f(p: &Cell<Point>) { |
| assert_eq!(p.get().z, 12); |
| p.set(Point {x: 10, y: 11, z: 13}); |
| assert_eq!(p.get().z, 13); |
| } |
| |
| #[test] |
| fn main() { |
| let a: Point = Point {x: 10, y: 11, z: 12}; |
| let b: &Cell<Point> = &Cell::new(a); |
| assert_eq!(b.get().z, 12); |
| f(b); |
| assert_eq!(a.x, 10); |
| assert_eq!(a.y, 11); |
| assert_eq!(a.z, 12); |
| assert_eq!(b.get().x, 10); |
| assert_eq!(b.get().y, 11); |
| assert_eq!(b.get().z, 13); |
| } |
