[libcxx-commits] [libcxx] [libc++] Add the __is_replaceable type trait (PR #132408)

[Mark de Wever via libcxx-commits]

https://github.com/mordante commented:

Thanks for doing this. Just curious did you do some benchmarks to see how much this performance this saves in our implementation?

In general looks good, some minor remarks.

https://github.com/llvm/llvm-project/pull/132408