[libcxx-commits] [libcxx] [libc++][C++26] P2562R1: `constexpr` Stable Sorting (PR #110320)

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PaulXiCao wrote:

This comment by Jiang An on the discord channel for reference:
> I think we may need to use std::__construct_at for older compilers. Once compiler versions that don't support constexpr placement-new are no longer supported, the workaround can be removed.

https://github.com/llvm/llvm-project/pull/110320