[llvm-branch-commits] [libcxx] release/23.x: [libc++] Opt `std::*set` out of map key extraction optimization (#220452) (PR #222641)

[Nikolas Klauser via llvm-branch-commits]

https://github.com/philnik777 approved this pull request.


https://github.com/llvm/llvm-project/pull/222641