| // Copyright 2012-2014 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. |
| |
| |
| |
| fn f(arg: &mut A) { |
| arg.a = 100; |
| } |
| |
| #[derive(Copy, Clone)] |
| struct A { a: isize } |
| |
| pub fn main() { |
| let mut x = A {a: 10}; |
| f(&mut x); |
| assert_eq!(x.a, 100); |
| x.a = 20; |
| let mut y = x; |
| f(&mut y); |
| assert_eq!(x.a, 20); |
| } |
