[all-commits] [llvm/llvm-project] 053a71: [libc++] Implement part of P2562R1: constexpr `ran...

[A. Jiang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 053a714adda3e1d3d506f417c7fbc6eb3fa75405
      https://github.com/llvm/llvm-project/commit/053a714adda3e1d3d506f417c7fbc6eb3fa75405
  Author: A. Jiang <de34 at live.cn>
  Date:   2025-03-20 (Thu, 20 Mar 2025)

  Changed paths:
    M libcxx/include/__algorithm/ranges_inplace_merge.h
    M libcxx/include/algorithm
    M libcxx/test/libcxx/algorithms/ranges_robust_against_copying_comparators.pass.cpp
    M libcxx/test/libcxx/algorithms/ranges_robust_against_copying_projections.pass.cpp
    M libcxx/test/std/algorithms/alg.sorting/alg.merge/ranges_inplace_merge.pass.cpp
    M libcxx/test/std/algorithms/ranges_robust_against_dangling.pass.cpp
    M libcxx/test/std/algorithms/ranges_robust_against_omitting_invoke.pass.cpp
    M libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp
    M libcxx/test/std/algorithms/robust_against_adl_on_new.pass.cpp

  Log Message:
  -----------
  [libc++] Implement part of P2562R1: constexpr `ranges::inplace_merge` (#131947)

Drive-by changes:
- Consistently mark `std::__inplace_merge::__inplace_merge_impl`
`_LIBCPP_CONSTEXPR_SINCE_CXX26`.
- This function template is only called by other functions that becomes
constexpr since C++26, and it itself calls `std::__inplace_merge` that
is constexpr since C++26.
- Unblock related test coverage in constant evaluation for
`stable_partition`, `ranges::stable_sort`, `std::stable_sort`,
`std::stable_partition`, and `std::inplace_merge`.



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