NoWrap data type in Rust

no-wrap.rs

#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Copy, Clone)]
pub struct NoWrap<T>(T);

impl std::ops::Add for NoWrap<u8> {
    type Output = Option<Self>;

    fn add(self, rhs: Self) -> Self::Output {
        self.0.checked_add(rhs.0).map(|x| NoWrap(x))
    }
}

fn main() {
    let x: NoWrap<u8> = NoWrap(128u8);
    let y: NoWrap<u8> = NoWrap(1u8);
    assert_eq!(x + y, Some(NoWrap(129)));
    assert_eq!(x + x, None);
}