> ISTR Rust implements a specialization on pointers Yes, and NonZeroU8 for Option<NonZeroU8> and friends: https://doc.rust-lang.org/std/num/struct.NonZeroU8.h

> ISTR Rust implements a specialization on pointers Yes, and NonZeroU8 for Option<NonZeroU8> and friends: https://doc.rust-lang.org/std/num/struct.NonZeroU8.html https://doc.rust-lang.org/std/num/struct.NonZeroU8.html