llvm-project

4ed8f38e - [libc++][pair] P2944R3: Constrain `std::pair`'s equality operator (#136672)

[libc++][pair] P2944R3: Constrain `std::pair`'s equality operator (#136672) Implements https://wg21.link/P2944R3 (partially): - [pairs.spec](https://eel.is/c++draft/pairs.spec) Related issues: - Related to #105424 - Related to #118135 - PR https://github.com/llvm/llvm-project/pull/135759 - PR https://github.com/llvm/llvm-project/pull/117664 Closes: [#136763](https://github.com/llvm/llvm-project/issues/136763) # References - https://eel.is/c++draft/concept.booleantestable - https://eel.is/c++draft/concept.equalitycomparable --------- Co-authored-by: Hristo Hristov <zingam@outlook.com> Co-authored-by: Nikolas Klauser <nikolasklauser@berlin.de>