#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::num::NonZero;
fn main() {
    test().unwrap();
}
fn test() -> Option<()> {
    let two = NonZero::new(2u8)?;
    let three = NonZero::new(3u8)?;
    let four = NonZero::new(4u8)?;
    let max = NonZero::new(u8::MAX)?;
    assert_eq!(Some(two), two.checked_next_power_of_two());
    assert_eq!(Some(four), three.checked_next_power_of_two());
    assert_eq!(None, max.checked_next_power_of_two());
    Some(())
}