Make rand::seq::gen_index public ?

[AdrienPensart]

Hello,

in order to choose a random variant in an enum (with help of Peternator7/strum#297), I would like to use rand::seq::gen_index as index, as it would suppress the need for Option, Iterator, etc.

But it is not marked public.

Would it be possible ? I could just copy/paste it but maybe others need it.

[TheIronBorn]

What does gen_index provide for you that gen_range doesn't?

[dhardy]

We could, though it's not much code to copy+paste. Specifically for enum variants, you are surely never going to be sampling larger than u32::MAX anyway?

[AdrienPensart]

Yes only small usize values.

[dhardy]

So why not copy but simplify to only the 32-bit path?

Actually, can't you determine the number of variants and select an appropriate method at compile time?

[AdrienPensart]

I copy/pasted the function, thanks!