nonzero! macro is not (yet) zero cost

[rukai]

Looking at the output of cargo asm on my application I can see function calls being generated from the nonzero macro

We could possibly add an #[inline(always)] but I dont think that will necessarily be enough, there might be more logic included.
To ensure it is actually zero cost we will need to make the macro generate code within a const context via rust-lang/rust#76001 once that is stabilized.

[antifuchs]

...oh noooo. Thanks for finding this & bringing it up!

Inlining sounds reasonable. Don't think we can do a const block in any case, because it needs to call a trait method, so until those can be const, I think inlining will be the best we can do. /:

I'd be happy to merge a PR & roll a release with this.