#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    assert_eq!(0_u8.wrapping_neg(), 0);
    assert_eq!(u8::MAX.wrapping_neg(), 1);
    assert_eq!(13_u8.wrapping_neg(), (! 13) + 1);
    assert_eq!(42_u8.wrapping_neg(), ! (42 - 1));
}