#![allow(dead_code, deprecated, unused_variables, unused_mut)]
fn main() {
    assert_eq!(10u8.checked_signed_diff(2), Some(8));
    assert_eq!(2u8.checked_signed_diff(10), Some(- 8));
    assert_eq!(u8::MAX.checked_signed_diff(i8::MAX as u8), None);
    assert_eq!((i8::MAX as u8).checked_signed_diff(u8::MAX), Some(i8::MIN));
    assert_eq!((i8::MAX as u8 + 1).checked_signed_diff(0), None);
    assert_eq!(u8::MAX.checked_signed_diff(u8::MAX), Some(0));
}