Function std::mem::swap

pub fn swap<T>(x: &mut T, y: &mut T)

Swap the values at two mutable locations of the same type, without deinitializing or copying either one.

Examples

use std::mem;

let x = &mut 5;
let y = &mut 42;

mem::swap(x, y);

assert_eq!(42, *x);
assert_eq!(5, *y);