Yeah, you’d need to do something like accept an enum that is either &mut [u8] or &mut [MaybeUninit<u8>], and make a couple of impl From<>’s so callers can .int

Yeah, you’d need to do something like accept an enum that is either &mut [u8] or &mut [MaybeUninit<u8>], and make a couple of impl From<>’s so callers can .into() whatever they want to pass… But I don’t think this is really a shortcoming, so much as a simple consequence of strong typing. If you want take “whatever” as a parameter, you have to spell out the types that satisfy it, whether it’s via a trait, or an enum with specific variants, etc. You don’t get to just cast things to void and hope for the best, and still call the result safe.