#![allow(dead_code, deprecated, unused_variables, unused_mut)] use std::num::NonZero; fn main() { test().unwrap(); } fn test() -> Option<()> { let one = NonZero::new(1u8)?; let two = NonZero::new(2u8)?; let four = NonZero::new(4u8)?; assert_eq!(one.midpoint(four), two); assert_eq!(four.midpoint(one), two); Some(()) }