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21 lines
674 B
Rust
21 lines
674 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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fn swap(f: |~[int]| -> ~[int]) -> ~[int] {
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let x = ~[1, 2, 3];
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f(x)
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}
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pub fn main() {
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let v = swap(|mut x| { x.push(4); x });
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let w = swap(|mut x| { x.push(4); x });
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assert_eq!(v, w);
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}
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