generate a function swaps two struct value

fn swap(left: &mut usize, right: &mut usize) {
    let temp = *left;
    *left = *right;
    *right = temp;
}

fn main() {
    let mut left = 1;
    let mut right = 2;
    swap(&mut left, &mut right);
    println!("left: {}, right: {}", left, right);
}