[libcxx-commits] [libcxx] [libc++] Implement `<bit>` parts of P3793R2 Better shifting (PR #219389)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 commented:

Basically looks good, just a few nits.

https://github.com/llvm/llvm-project/pull/219389