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use number_traits::Num;


#[inline]
pub fn add<'a, 'b, T: Copy + Num>(out: &'a mut [T; 4], a: &'b [T; 4], b: &'b [T; 4]) ->  &'a mut [T; 4] {
    out[0] = a[0] + b[0];
    out[1] = a[1] + b[1];
    out[2] = a[2] + b[2];
    out[3] = a[3] + b[3];
    out
}
#[test]
fn test_add() {
    let mut v = [0, 0, 0, 0];
    add(&mut v, &[1, 1, 1, 1], &[1, 1, 1, 1]);
    assert!(v[0] == 2);
    assert!(v[1] == 2);
    assert!(v[2] == 2);
    assert!(v[3] == 2);
}

#[inline]
pub fn sadd<'a, 'b, T: Copy + Num>(out: &'a mut [T; 4], a: &'b [T; 4], s: T) ->  &'a mut [T; 4] {
    out[0] = a[0] + s;
    out[1] = a[1] + s;
    out[2] = a[2] + s;
    out[3] = a[3] + s;
    out
}
#[test]
fn test_sadd() {
    let mut v = [0, 0, 0, 0];
    sadd(&mut v, &[0, 0, 0, 0], 1);
    assert!(v[0] == 1);
    assert!(v[1] == 1);
    assert!(v[2] == 1);
    assert!(v[3] == 1);
}