#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    let n = !(u8::MAX >> 2);
    assert_eq!(n.leading_ones(), 2);
    let zero = 0u8;
    assert_eq!(zero.leading_ones(), 0);
    let max = u8::MAX;
    assert_eq!(max.leading_ones(), 8);
}