[libcxx-commits] [PATCH] D131495: [libc++] implement "pair" section of P2321R2 `zip`

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implement swap


- add constructors that takes non-const lvalue ref pair and const rvalue ref pair
- add const assignment operators
- add const swap member and non member

(note) the pair changes in `uses_allocator_construction_args` has not been implemented as the C++20 paper P0591r4 has not been implemented in libcxx


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D131495

Files:
  libcxx/docs/Status/ZipProjects.csv
  libcxx/include/__utility/pair.h
  libcxx/include/utility
  libcxx/test/std/utilities/utility/pairs/pairs.pair/assign_const_copy_convert.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.pair/assign_const_copy_pair.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.pair/assign_const_move_convert.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.pair/assign_const_move_pair.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.pair/ctor_pair_U_V_const_move.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.pair/ctor_pair_U_V_ref.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.pair/swap_member_const.pass.cpp
  libcxx/test/std/utilities/utility/pairs/pairs.spec/non_member_const_swap.pass.cpp

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