construct_tuple

macro_rules! construct_tuple {
    (0,$it:expr) => ();
    ($n:expr, $e:expr) => (
        $e,construct_tuple!($n-1,$e)
    );
}

#[test]
fn construct_tuple() {
    let t = (construct_tuple!(2,1u8),);
    assert_eq!(t,(1,1));
}