fn main() {}
fn test(condition: bool) -> u32 {
    let mut first = 33;
    let mut second = 99;

    // Only this can be modified
    // -------------------v
    if condition {
        let tmp = first;
        first = second;
        second = tmp;
    }
    // -------------------^

    // This would be an alternative, but the 'else' branch seems pointless
    let (first, second) = if condition {
        (second, first)
    } else {
        (first, second)
    };

    // This does not work
    //if condition {
    //    (first, second) = (second, first);
    //}

    first + second
}