[libcxx-commits] [libcxx] [libc++] Refactor key extraction for __hash_table and __tree (PR #154512)

[Louis Dionne via libcxx-commits]

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ldionne wrote:

Can you please make sure we have a test for a `std::set<std::pair<Foo, Bar>>` where we do `s.emplace(std::pair<Foo, Bar>(...))`? Same for `std::multiset` and `std::unordered_set`/`std::unordered_multiset`.

https://github.com/llvm/llvm-project/pull/154512