rust/tests/ui/swap.rs

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// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// 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.
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#![warn(clippy::all)]
#![allow(clippy::blacklisted_name, unused_assignments)]
struct Foo(u32);
fn array() {
let mut foo = [1, 2];
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let temp = foo[0];
foo[0] = foo[1];
foo[1] = temp;
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foo.swap(0, 1);
}
fn slice() {
let foo = &mut [1, 2];
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let temp = foo[0];
foo[0] = foo[1];
foo[1] = temp;
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foo.swap(0, 1);
}
fn vec() {
let mut foo = vec![1, 2];
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let temp = foo[0];
foo[0] = foo[1];
foo[1] = temp;
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foo.swap(0, 1);
}
fn main() {
array();
slice();
vec();
let mut a = 42;
let mut b = 1337;
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a = b;
b = a;
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; let t = a;
a = b;
b = t;
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let mut c = Foo(42);
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c.0 = a;
a = c.0;
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; let t = c.0;
c.0 = a;
a = t;
}