#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(nonzero_bitwise)]
use std::num::NonZero;
fn main() {
    test().unwrap();
}
fn test() -> Option<()> {
    let n = NonZero::new(0x12u8)?;
    let m = n.swap_bytes();
    assert_eq!(m, NonZero::new(0x12) ?);
    Some(())
}