I don't think the mechanics of being able to convey a niche are stable/developer... | Hacker News

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		dwattttt on Nov 24, 2024 \| parent \| context \| favorite \| on: Rust's Two Kinds of 'Assert' Make for Better Code I don't think the mechanics of being able to convey a niche are stable/developer-accessible, but NonZero is a type provided by the standard library: https://doc.rust-lang.org/std/num/struct.NonZero.html An example of the niche optimisations is in that link; if a 32bit number is NonZero, you can put that in an Option, and your Option<NonZero<u32>> will be the same size as a normal u32.

phamilton on Nov 25, 2024 [–]

An interesting project for niche types: https://github.com/rick-de-water/nonany

It's not perfect but does allow some flexibility.

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