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[libc++] Bump __cpp_lib_constexpr_algorithms for P2562R1 in C++26 #132075

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Merged
merged 2 commits into from
Mar 20, 2025
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[libc++] Bump __cpp_lib_constexpr_algorithms for P2562R1 in C++26 #132075

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c68c4ad
[libc++] Bump `__cpp_lib_constexpr_algorithms` for P2562R1 in C++26
frederick-vs-ja Mar 19, 2025
5339a98
Address @mordante's review comments
frederick-vs-ja Mar 19, 2025
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2 changes: 2 additions & 0 deletions libcxx/docs/FeatureTestMacroTable.rst
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Expand Up @@ -416,6 +416,8 @@ Status
---------------------------------------------------------- -----------------
``__cpp_lib_bitset`` ``202306L``
---------------------------------------------------------- -----------------
``__cpp_lib_constexpr_algorithms`` ``202306L``
---------------------------------------------------------- -----------------
``__cpp_lib_constexpr_new`` ``202406L``
---------------------------------------------------------- -----------------
``__cpp_lib_constrained_equality`` *unimplemented*
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1 change: 1 addition & 0 deletions libcxx/docs/ReleaseNotes/21.rst
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Expand Up @@ -42,6 +42,7 @@ Implemented Papers
- P0767R1: Deprecate POD (`Github <https://github.com/llvm/llvm-project/issues/104013>`__)
- P1361R2: Integration of chrono with text formatting (`Github <https://github.com/llvm/llvm-project/issues/100014>`__)
- P2255R2: A type trait to detect reference binding to temporary (implemented the type traits only) (`Github <https://github.com/llvm/llvm-project/issues/105180>`__)
- P2562R1: `constexpr`` Stable Sorting (`Github <https://github.com/llvm/llvm-project/issues/105360>`__`)

Improvements and New Features
-----------------------------
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2 changes: 1 addition & 1 deletion libcxx/docs/Status/Cxx2cPapers.csv
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Expand Up @@ -2,7 +2,7 @@
"`P2497R0 <https://wg21.link/P2497R0>`__","Testing for success or failure of ``<charconv>`` functions","2023-06 (Varna)","|Complete|","18",""
"`P2592R3 <https://wg21.link/P2592R3>`__","Hashing support for ``std::chrono`` value classes","2023-06 (Varna)","","",""
"`P2587R3 <https://wg21.link/P2587R3>`__","``to_string`` or not ``to_string``","2023-06 (Varna)","","",""
"`P2562R1 <https://wg21.link/P2562R1>`__","``constexpr`` Stable Sorting","2023-06 (Varna)","|Partial|","20",""
"`P2562R1 <https://wg21.link/P2562R1>`__","``constexpr`` Stable Sorting","2023-06 (Varna)","|Complete|","21",""
"`P2545R4 <https://wg21.link/P2545R4>`__","Read-Copy Update (RCU)","2023-06 (Varna)","","",""
"`P2530R3 <https://wg21.link/P2530R3>`__","Hazard Pointers for C++26","2023-06 (Varna)","","",""
"`P2538R1 <https://wg21.link/P2538R1>`__","ADL-proof ``std::projected``","2023-06 (Varna)","|Complete|","18",""
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5 changes: 4 additions & 1 deletion libcxx/include/version
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Expand Up @@ -60,7 +60,8 @@ __cpp_lib_chrono_udls 201304L <chrono>
__cpp_lib_clamp 201603L <algorithm>
__cpp_lib_complex_udls 201309L <complex>
__cpp_lib_concepts 202002L <concepts>
__cpp_lib_constexpr_algorithms 201806L <algorithm> <utility>
__cpp_lib_constexpr_algorithms 202306L <algorithm> <utility>
201806L // C++20
__cpp_lib_constexpr_bitset 202207L <bitset>
__cpp_lib_constexpr_charconv 202207L <charconv>
__cpp_lib_constexpr_cmath 202202L <cmath> <cstdlib>
Expand Down Expand Up @@ -536,6 +537,8 @@ __cpp_lib_void_t 201411L <type_traits>
# undef __cpp_lib_bind_front
# define __cpp_lib_bind_front 202306L
# define __cpp_lib_bitset 202306L
# undef __cpp_lib_constexpr_algorithms
# define __cpp_lib_constexpr_algorithms 202306L
# if !defined(_LIBCPP_ABI_VCRUNTIME)
# define __cpp_lib_constexpr_new 202406L
# endif
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5 changes: 3 additions & 2 deletions ...language.support/support.limits/support.limits.general/algorithm.version.compile.pass.cpp
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Expand Up @@ -18,6 +18,7 @@
/* Constant Value
__cpp_lib_clamp 201603L [C++17]
__cpp_lib_constexpr_algorithms 201806L [C++20]
202306L [C++26]
__cpp_lib_default_template_type_for_algorithm_values 202403L [C++26]
__cpp_lib_freestanding_algorithm 202311L [C++26]
__cpp_lib_parallel_algorithm 201603L [C++17]
Expand Down Expand Up @@ -380,8 +381,8 @@
# ifndef __cpp_lib_constexpr_algorithms
# error "__cpp_lib_constexpr_algorithms should be defined in c++26"
# endif
# if __cpp_lib_constexpr_algorithms != 201806L
# error "__cpp_lib_constexpr_algorithms should have the value 201806L in c++26"
# if __cpp_lib_constexpr_algorithms != 202306L
# error "__cpp_lib_constexpr_algorithms should have the value 202306L in c++26"
# endif

# if !defined(_LIBCPP_VERSION)
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5 changes: 3 additions & 2 deletions ...d/language.support/support.limits/support.limits.general/utility.version.compile.pass.cpp
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Expand Up @@ -18,6 +18,7 @@
/* Constant Value
__cpp_lib_as_const 201510L [C++17]
__cpp_lib_constexpr_algorithms 201806L [C++20]
202306L [C++26]
__cpp_lib_constexpr_utility 201811L [C++20]
__cpp_lib_constrained_equality 202403L [C++26]
__cpp_lib_exchange_function 201304L [C++14]
Expand Down Expand Up @@ -407,8 +408,8 @@
# ifndef __cpp_lib_constexpr_algorithms
# error "__cpp_lib_constexpr_algorithms should be defined in c++26"
# endif
# if __cpp_lib_constexpr_algorithms != 201806L
# error "__cpp_lib_constexpr_algorithms should have the value 201806L in c++26"
# if __cpp_lib_constexpr_algorithms != 202306L
# error "__cpp_lib_constexpr_algorithms should have the value 202306L in c++26"
# endif

# ifndef __cpp_lib_constexpr_utility
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5 changes: 3 additions & 2 deletions ...d/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
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Expand Up @@ -56,6 +56,7 @@
__cpp_lib_complex_udls 201309L [C++14]
__cpp_lib_concepts 202002L [C++20]
__cpp_lib_constexpr_algorithms 201806L [C++20]
202306L [C++26]
__cpp_lib_constexpr_bitset 202207L [C++23]
__cpp_lib_constexpr_charconv 202207L [C++23]
__cpp_lib_constexpr_cmath 202202L [C++23]
Expand Down Expand Up @@ -6565,8 +6566,8 @@
# ifndef __cpp_lib_constexpr_algorithms
# error "__cpp_lib_constexpr_algorithms should be defined in c++26"
# endif
# if __cpp_lib_constexpr_algorithms != 201806L
# error "__cpp_lib_constexpr_algorithms should have the value 201806L in c++26"
# if __cpp_lib_constexpr_algorithms != 202306L
# error "__cpp_lib_constexpr_algorithms should have the value 202306L in c++26"
# endif

# ifndef __cpp_lib_constexpr_bitset
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2 changes: 1 addition & 1 deletion libcxx/utils/generate_feature_test_macro_components.py
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Expand Up @@ -320,7 +320,7 @@ def add_version_header(tc):
"name": "__cpp_lib_constexpr_algorithms",
"values": {
"c++20": 201806,
# "c++26": 202306, # P2562R1 constexpr Stable Sorting
"c++26": 202306, # P2562R1 constexpr Stable Sorting
},
"headers": ["algorithm", "utility"],
},
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