#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let v = [1, -2, 3, -4, 5, -6];
    {
        let (left, right) = v.split_at_checked(0).unwrap();
        assert_eq!(left, []);
        assert_eq!(right, [1, - 2, 3, - 4, 5, - 6]);
    }
    {
        let (left, right) = v.split_at_checked(2).unwrap();
        assert_eq!(left, [1, - 2]);
        assert_eq!(right, [3, - 4, 5, - 6]);
    }
    {
        let (left, right) = v.split_at_checked(6).unwrap();
        assert_eq!(left, [1, - 2, 3, - 4, 5, - 6]);
        assert_eq!(right, []);
    }
    assert_eq!(None, v.split_at_checked(7));
}