44 lines
980 B
Rust
44 lines
980 B
Rust
// Copyright 2013 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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struct X {
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a: int
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}
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trait Changer {
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fn change(mut self) -> Self {
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self.set_to(55);
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self
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}
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fn change_again(mut ~self) -> ~Self {
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self.set_to(45);
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self
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}
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fn set_to(&mut self, a: int);
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}
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impl Changer for X {
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fn set_to(&mut self, a: int) {
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self.a = a;
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}
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}
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pub fn main() {
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let x = X { a: 32 };
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let new_x = x.change();
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assert_eq!(new_x.a, 55);
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let x = ~new_x;
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let new_x = x.change_again();
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assert_eq!(new_x.a, 45);
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}
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