23 lines
757 B
Rust
23 lines
757 B
Rust
// Copyright 2012 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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use std::mem::swap;
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pub fn main() {
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let mut a: Vec<int> = vec!(0, 1, 2, 3, 4, 5, 6);
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a.as_mut_slice().swap(2, 4);
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assert_eq!(*a.get(2), 4);
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assert_eq!(*a.get(4), 2);
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let mut n = 42;
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swap(&mut n, a.get_mut(0));
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assert_eq!(*a.get(0), 42);
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assert_eq!(n, 0);
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}
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