rust/src/test/run-pass/expr-copy.rs
2013-03-29 16:39:08 -07:00

28 lines
705 B
Rust

// 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.
// xfail-fast
fn f(arg: &mut A) {
arg.a = 100;
}
struct A { a: int }
pub fn main() {
let mut x = A {a: 10};
f(&mut x);
assert!(x.a == 100);
x.a = 20;
let mut y = copy x;
f(&mut y);
assert!(x.a == 20);
}