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use number_traits::Num;

#[inline]
pub fn add<'a, T: Copy + Num>(out: &'a mut [T; 2], a: &[T; 2], b: &[T; 2]) -> &'a mut [T; 2] {
    out[0] = a[0] + b[0];
    out[1] = a[1] + b[1];
    out
}
#[test]
fn test_add() {
    let mut v = [0, 0];
    add(&mut v, &[1, 1], &[1, 1]);
    assert!(v[0] == 2);
    assert!(v[1] == 2);
}

#[inline]
pub fn sadd<'a, T: Copy + Num>(out: &'a mut [T; 2], a: &[T; 2], s: T) -> &'a mut [T; 2] {
    out[0] = a[0] + s;
    out[1] = a[1] + s;
    out
}
#[test]
fn test_sadd() {
    let mut v = [0, 0];
    sadd(&mut v, &[0, 0], 1);
    assert!(v[0] == 1);
    assert!(v[1] == 1);
}