28 lines
709 B
Rust
28 lines
709 B
Rust
// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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fn f(arg: &mut A) {
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arg.a = 100;
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}
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#[derive(Copy)]
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struct A { a: int }
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pub fn main() {
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let mut x = A {a: 10};
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f(&mut x);
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assert_eq!(x.a, 100);
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x.a = 20;
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let mut y = x;
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f(&mut y);
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assert_eq!(x.a, 20);
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}
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