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// 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.
struct Pair { a: Box<int>, b: Box<int> }
pub fn main() {
let mut x = box Pair {a: box 10, b: box 20};
let x_internal = &mut *x;
match *x_internal {
Pair {a: ref mut a, b: ref mut _b} => {
assert!(**a == 10); *a = box 30; assert!(**a == 30);
}
}
}
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