[libcxx-commits] [libcxx] [libc++] Implement C++29 Bit Permutations P3104R6 (PR #217820)

[Hristo Hristov via libcxx-commits]

Zingam wrote:

> > The CI fails because of `_LIBCPP_STD_VER` being `29` is not valid yet, apparently just an `#if` check is enough to trigger that.
> 
> See #215820
> 
> You can skip the guards for now to get the CI green and add them, when they are available if you like. This won't land before C++29 support anyway.

@siradam7th C++29 support landed successfuĺly. Please rebase.

https://github.com/llvm/llvm-project/pull/217820