Tracking issue for `.trailing_ones()` + `leading_ones()`

[yoshuawuyts]

This is a tracking issue for the feature leading_trailing_ones which adds trailing_ones and leading_ones to all primitive integer types. (trailing_zeros and leading_zeros already existed before.)

TODO:

• Merge implementation Add leading_ones and trailing_ones methods to the primitive integer types #68165
• Adjust documentation (see instructions on rustc-guide)
• Stabilization PR (see instructions on rustc-guide)

Unresolved questions

• none so far?

Implementation History

• Initial implementation Add leading_ones and trailing_ones methods to the primitive integer types #68165
• Stabilization PR stabilize leading_trailing_ones #73032

[nagisa]

Lets repurpose this into a tracking issue so that you would have stuff to put into the tracking issue in the PR...

[SimonSapin]

Closing since #55715 did not land. Feel free to reopen if/when it does.

[crlf0710]

Now that here's another PR(#68165), maybe we should reopen this issue? @SimonSapin @nagisa

[djc]

So we've had this for a while now, and it would be nice to stabilize. Seems pretty simple. Libs team folks?