leading_ones and trailing_ones missing for PrimInt

[StephanvanSchaik]

It seems like the leading_ones() and trailing_ones() functions are missing for the PrimInt trait. However, I am not entirely sure why as the leading_zeros() and trailing_zeros() seem to be available.

While I could invert the bit representation and use the trailing_zeros() function for now, it would be convenient if I could just use the trailing_ones() function instead.

[cuviper]

That's just history -- the _zeros functions have existed since Rust 1.0, but the _ones functions were only stabilized in 1.46.0. (I'm not sure when they were first added unstable.)

While I could invert the bit representation and use the trailing_zeros() function for now, it would be convenient if I could just use the trailing_ones() function instead.

That's exactly what the standard library functions do, literally (!self).trailing_zeros(), but we could also add those with the same default implementation in PrimInt.

[cuviper]

Actually, #205 already added these -- I just haven't published a new version yet.

[StephanvanSchaik]

Thanks for the clarification!

Is there any roadmap of when a new release of the num-traits crate will be published? I think that otherwise the issue is pretty much solved for me then.

[cuviper]

I finally published that a couple days ago in 0.2.15.