[libc++] Update status after the St. Louis meeting. (#97951)

This updates:
- The status tables
- Feature test macros
- New headers for modules

libcxx/docs/FeatureTestMacroTable.rst

@@ -402,6 +402,8 @@ Status
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_bitset``                                       ``202306L``
     ---------------------------------------------------------- -----------------
+    ``__cpp_lib_constexpr_new``                                *unimplemented*
+    ---------------------------------------------------------- -----------------
     ``__cpp_lib_constrained_equality``                         *unimplemented*
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_copyable_function``                            *unimplemented*
@@ -436,12 +438,20 @@ Status
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_hazard_pointer``                               *unimplemented*
     ---------------------------------------------------------- -----------------
+    ``__cpp_lib_inplace_vector``                               *unimplemented*
+    ---------------------------------------------------------- -----------------
+    ``__cpp_lib_is_virtual_base_of``                           *unimplemented*
+    ---------------------------------------------------------- -----------------
     ``__cpp_lib_is_within_lifetime``                           *unimplemented*
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_linalg``                                       *unimplemented*
     ---------------------------------------------------------- -----------------
+    ``__cpp_lib_optional_range_support``                       *unimplemented*
+    ---------------------------------------------------------- -----------------
     ``__cpp_lib_out_ptr``                                      *unimplemented*
     ---------------------------------------------------------- -----------------
+    ``__cpp_lib_philox_engine``                                *unimplemented*
+    ---------------------------------------------------------- -----------------
     ``__cpp_lib_ranges_concat``                                *unimplemented*
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_ratio``                                        ``202306L``
@@ -452,6 +462,8 @@ Status
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_saturation_arithmetic``                        ``202311L``
     ---------------------------------------------------------- -----------------
+    ``__cpp_lib_senders``                                      *unimplemented*
+    ---------------------------------------------------------- -----------------
     ``__cpp_lib_smart_ptr_owner_equality``                     *unimplemented*
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_span_at``                                      ``202311L``

libcxx/docs/Status/Cxx2c.rst

@@ -42,6 +42,7 @@ Paper Status
    .. [#note-P2510R3] This paper is applied as DR against C++20. (MSVC STL and libstdc++ will do the same.)
    .. [#note-P3142R0] This paper is applied as DR against C++23. (MSVC STL and libstdc++ will do the same.)
    .. [#note-P2944R3] Implemented comparisons for ``reference_wrapper`` only.
+   .. [#note-P2422R1] Libc++ keeps the ``nodiscard`` attributes as a conforming extension.
 
 .. _issues-status-cxx2c:
 

libcxx/docs/Status/Cxx2cIssues.csv

@@ -62,7 +62,20 @@
 "`4053 <https://wg21.link/LWG4053>`__","Unary call to ``std::views::repeat`` does not decay the argument","Tokyo March 2024","|Complete|","19.0","|ranges|"
 "`4054 <https://wg21.link/LWG4054>`__","Repeating a ``repeat_view`` should repeat the view","Tokyo March 2024","|Complete|","19.0","|ranges|"
 "","","","","",""
+"`3944 <https://wg21.link/LWG3944>`__","Formatters converting sequences of ``char`` to sequences of ``wchar_t``","St. Louis June 2024","","","|format|"
+"`4060 <https://wg21.link/LWG4060>`__","``submdspan`` preconditions do not forbid creating invalid pointer","St. Louis June 2024","","",""
+"`4061 <https://wg21.link/LWG4061>`__","Should ``std::basic_format_context`` be default-constructible/copyable/movable?","St. Louis June 2024","","","|format|"
+"`4071 <https://wg21.link/LWG4071>`__","``reference_wrapper`` comparisons are not SFINAE-friendly","St. Louis June 2024","|Complete|","19.0",""
+"`4074 <https://wg21.link/LWG4074>`__","``compatible-joinable-ranges`` is underconstrained","St. Louis June 2024","","","|ranges|"
+"`4076 <https://wg21.link/LWG4076>`__","``concat_view`` should be freestanding","St. Louis June 2024","","",""
+"`4079 <https://wg21.link/LWG4079>`__","Missing Preconditions in ``concat_view::iterator``\`s conversion constructor","St. Louis June 2024","","","|ranges|"
+"`4082 <https://wg21.link/LWG4082>`__","``views::concat(r)`` is well-formed when ``r`` is an ``output_range``","St. Louis June 2024","","","|ranges|"
+"`4083 <https://wg21.link/LWG4083>`__","``views::as_rvalue`` should reject non-input ranges","St. Louis June 2024","","","|ranges|"
+"`4096 <https://wg21.link/LWG4096>`__","``views::iota(views::iota(0))`` should be rejected","St. Louis June 2024","","","|ranges|"
+"`4098 <https://wg21.link/LWG4098>`__","``views::adjacent<0>`` should reject non-forward ranges","St. Louis June 2024","","","|ranges|"
+"`4105 <https://wg21.link/LWG4105>`__","``ranges::ends_with``\`s Returns misses difference casting","St. Louis June 2024","","","|ranges|"
+"`4106 <https://wg21.link/LWG4106>`__","``basic_format_args`` should not be default-constructible","St. Louis June 2024","","","|format|"
+"","","","","",""
 "`3343 <https://wg21.link/LWG3343>`__","Ordering of calls to ``unlock()`` and ``notify_all()`` in Effects element of ``notify_all_at_thread_exit()`` should be reversed","Not Yet Adopted","|Complete|","16.0",""
 "XXXX","","The sys_info range should be affected by save","Not Yet Adopted","|Complete|","19.0"
-"`4071 <https://wg21.link/LWG4071>`__","","``reference_wrapper`` comparisons are not SFINAE-friendly","Not Yet Adopted","|Complete|","19.0"
 "","","","","",""

libcxx/docs/Status/Cxx2cPapers.csv

@@ -63,3 +63,16 @@
 "`P2642R6 <https://wg21.link/P2642R6>`__","LWG","Padded ``mdspan`` layouts","Tokyo March 2024","","",""
 "`P3029R1 <https://wg21.link/P3029R1>`__","LWG","Better ``mdspan``'s CTAD","Tokyo March 2024","|Complete|","19.0",""
 "","","","","","",""
+"`P2747R2 <https://wg21.link/P2747R2>`__","CWG","``constexpr`` placement new","St. Louis June 2024","","",""
+"`P2997R1 <https://wg21.link/P2997R1>`__","LWG","Removing the common reference requirement from the indirectly invocable concepts","St. Louis June 2024","","",""
+"`P2389R2 <https://wg21.link/P2389R2>`__","LWG","``dextents`` Index Type Parameter","St. Louis June 2024","","",""
+"`P3168R2 <https://wg21.link/P3168R2>`__","LWG","Give ``std::optional`` Range Support","St. Louis June 2024","","","|ranges|"
+"`P3217R0 <https://wg21.link/P3217R0>`__","LWG","Adjoints to 'Enabling list-initialization for algorithms': find_last","St. Louis June 2024","","",""
+"`P2985R0 <https://wg21.link/P2985R0>`__","LWG","A type trait for detecting virtual base classes","St. Louis June 2024","","",""
+"`P0843R14 <https://wg21.link/P0843R14>`__","LWG","``inplace_vector``","St. Louis June 2024","","",""
+"`P3235R3 <https://wg21.link/P3235R3>`__","LWG","``std::print`` more types faster with less memory","St. Louis June 2024","","","|format| |DR|"
+"`P2968R2 <https://wg21.link/P2968R2>`__","LWG","Make ``std::ignore`` a first-class object","St. Louis June 2024","","",""
+"`P2075R6 <https://wg21.link/P2075R6>`__","LWG","Philox as an extension of the C++ RNG engines","St. Louis June 2024","","",""
+"`P2422R1 <https://wg21.link/P2422R1>`__","LWG","Remove ``nodiscard`` annotations from the standard library specification","St. Louis June 2024","|Complete| [#note-P2422R1]_","19.0",""
+"`P2300R10 <https://wg21.link/P2300R10>`__","LWG","``std::execution``","St. Louis June 2024","","",""
+"","","","","","",""

libcxx/include/version

@@ -70,6 +70,7 @@ __cpp_lib_constexpr_functional                          201907L <functional>
 __cpp_lib_constexpr_iterator                            201811L <iterator>
 __cpp_lib_constexpr_memory                              202202L <memory>
                                                         201811L // C++20
+__cpp_lib_constexpr_new                                 202406L <new>
 __cpp_lib_constexpr_numeric                             201911L <numeric>
 __cpp_lib_constexpr_string                              201907L <string>
 __cpp_lib_constexpr_string_view                         201811L <string_view>
@@ -125,6 +126,7 @@ __cpp_lib_has_unique_object_representations             201606L <type_traits>
 __cpp_lib_hazard_pointer                                202306L <hazard_pointer>
 __cpp_lib_hypot                                         201603L <cmath>
 __cpp_lib_incomplete_container_elements                 201505L <forward_list> <list> <vector>
+__cpp_lib_inplace_vector                                202406L <inplace_vector>
 __cpp_lib_int_pow2                                      202002L <bit>
 __cpp_lib_integer_comparison_functions                  202002L <utility>
 __cpp_lib_integer_sequence                              201304L <utility>
@@ -143,6 +145,7 @@ __cpp_lib_is_null_pointer                               201309L <type_traits>
 __cpp_lib_is_pointer_interconvertible                   201907L <type_traits>
 __cpp_lib_is_scoped_enum                                202011L <type_traits>
 __cpp_lib_is_swappable                                  201603L <type_traits>
+__cpp_lib_is_virtual_base_of                            202406L <type_traits>
 __cpp_lib_is_within_lifetime                            202306L <type_traits>
 __cpp_lib_jthread                                       201911L <stop_token> <thread>
 __cpp_lib_latch                                         201907L <latch>
@@ -170,9 +173,11 @@ __cpp_lib_not_fn                                        201603L <functional>
 __cpp_lib_null_iterators                                201304L <iterator>
 __cpp_lib_optional                                      202110L <optional>
                                                         201606L // C++17
+__cpp_lib_optional_range_support                        202406L <optional>
 __cpp_lib_out_ptr                                       202311L <memory>
                                                         202106L // C++23
 __cpp_lib_parallel_algorithm                            201603L <algorithm> <numeric>
+__cpp_lib_philox_engine                                 202406L <random>
 __cpp_lib_polymorphic_allocator                         201902L <memory_resource>
 __cpp_lib_print                                         202207L <ostream> <print>
 __cpp_lib_quoted_string_io                              201304L <iomanip>
@@ -203,6 +208,7 @@ __cpp_lib_sample                                        201603L <algorithm>
 __cpp_lib_saturation_arithmetic                         202311L <numeric>
 __cpp_lib_scoped_lock                                   201703L <mutex>
 __cpp_lib_semaphore                                     201907L <semaphore>
+__cpp_lib_senders                                       202406L <execution>
 __cpp_lib_shared_mutex                                  201505L <shared_mutex>
 __cpp_lib_shared_ptr_arrays                             201707L <memory>
                                                         201611L // C++17
@@ -500,6 +506,7 @@ __cpp_lib_void_t                                        201411L <type_traits>
 # undef  __cpp_lib_bind_front
 # define __cpp_lib_bind_front                           202306L
 # define __cpp_lib_bitset                               202306L
+// # define __cpp_lib_constexpr_new                        202406L
 // # define __cpp_lib_constrained_equality                 202403L
 // # define __cpp_lib_copyable_function                    202306L
 // # define __cpp_lib_debugging                            202311L
@@ -519,15 +526,20 @@ __cpp_lib_void_t                                        201411L <type_traits>
 // # define __cpp_lib_function_ref                         202306L
 // # define __cpp_lib_generate_random                      202403L
 // # define __cpp_lib_hazard_pointer                       202306L
+// # define __cpp_lib_inplace_vector                       202406L
+// # define __cpp_lib_is_virtual_base_of                   202406L
 // # define __cpp_lib_is_within_lifetime                   202306L
 // # define __cpp_lib_linalg                               202311L
+// # define __cpp_lib_optional_range_support               202406L
 # undef  __cpp_lib_out_ptr
 // # define __cpp_lib_out_ptr                              202311L
+// # define __cpp_lib_philox_engine                        202406L
 // # define __cpp_lib_ranges_concat                        202403L
 # define __cpp_lib_ratio                                202306L
 // # define __cpp_lib_rcu                                  202306L
 # define __cpp_lib_reference_wrapper                    202403L
 # define __cpp_lib_saturation_arithmetic                202311L
+// # define __cpp_lib_senders                              202406L
 // # define __cpp_lib_smart_ptr_owner_equality             202306L
 # define __cpp_lib_span_at                              202311L
 # define __cpp_lib_span_initializer_list                202311L

libcxx/modules/std.compat.cppm.in

@@ -69,6 +69,9 @@ module;
 #  if __has_include(<hazard_pointer>)
 #    error "please update the header information for <hazard_pointer> in headers_not_available in utils/libcxx/header_information.py"
 #  endif // __has_include(<hazard_pointer>)
+#  if __has_include(<inplace_vector>)
+#    error "please update the header information for <inplace_vector> in headers_not_available in utils/libcxx/header_information.py"
+#  endif // __has_include(<inplace_vector>)
 #  if __has_include(<linalg>)
 #    error "please update the header information for <linalg> in headers_not_available in utils/libcxx/header_information.py"
 #  endif // __has_include(<linalg>)

libcxx/modules/std.cppm.in

@@ -191,6 +191,9 @@ module;
 #  if __has_include(<hazard_pointer>)
 #    error "please update the header information for <hazard_pointer> in headers_not_available in utils/libcxx/header_information.py"
 #  endif // __has_include(<hazard_pointer>)
+#  if __has_include(<inplace_vector>)
+#    error "please update the header information for <inplace_vector> in headers_not_available in utils/libcxx/header_information.py"
+#  endif // __has_include(<inplace_vector>)
 #  if __has_include(<linalg>)
 #    error "please update the header information for <linalg> in headers_not_available in utils/libcxx/header_information.py"
 #  endif // __has_include(<linalg>)

libcxx/test/std/language.support/support.limits/support.limits.general/execution.version.compile.pass.cpp

@@ -18,6 +18,7 @@
 /*  Constant               Value
     __cpp_lib_execution    201603L [C++17]
                            201902L [C++20]
+    __cpp_lib_senders      202406L [C++26]
 */
 
 #include <execution>
@@ -29,12 +30,20 @@
 #   error "__cpp_lib_execution should not be defined before c++17"
 # endif
 
+# ifdef __cpp_lib_senders
+#   error "__cpp_lib_senders should not be defined before c++26"
+# endif
+
 #elif TEST_STD_VER == 14
 
 # ifdef __cpp_lib_execution
 #   error "__cpp_lib_execution should not be defined before c++17"
 # endif
 
+# ifdef __cpp_lib_senders
+#   error "__cpp_lib_senders should not be defined before c++26"
+# endif
+
 #elif TEST_STD_VER == 17
 
 # if !defined(_LIBCPP_VERSION)
@@ -50,6 +59,10 @@
 #   endif
 # endif
 
+# ifdef __cpp_lib_senders
+#   error "__cpp_lib_senders should not be defined before c++26"
+# endif
+
 #elif TEST_STD_VER == 20
 
 # if !defined(_LIBCPP_VERSION)
@@ -65,6 +78,10 @@
 #   endif
 # endif
 
+# ifdef __cpp_lib_senders
+#   error "__cpp_lib_senders should not be defined before c++26"
+# endif
+
 #elif TEST_STD_VER == 23
 
 # if !defined(_LIBCPP_VERSION)
@@ -80,6 +97,10 @@
 #   endif
 # endif
 
+# ifdef __cpp_lib_senders
+#   error "__cpp_lib_senders should not be defined before c++26"
+# endif
+
 #elif TEST_STD_VER > 23
 
 # if !defined(_LIBCPP_VERSION)
@@ -95,5 +116,18 @@
 #   endif
 # endif
 
+# if !defined(_LIBCPP_VERSION)
+#   ifndef __cpp_lib_senders
+#     error "__cpp_lib_senders should be defined in c++26"
+#   endif
+#   if __cpp_lib_senders != 202406L
+#     error "__cpp_lib_senders should have the value 202406L in c++26"
+#   endif
+# else // _LIBCPP_VERSION
+#   ifdef __cpp_lib_senders
+#     error "__cpp_lib_senders should not be defined because it is unimplemented in libc++!"
+#   endif
+# endif
+
 #endif // TEST_STD_VER > 23
 

libcxx/test/std/language.support/support.limits/support.limits.general/new.version.compile.pass.cpp

@@ -16,6 +16,7 @@
 // Test the feature test macros defined by <new>
 
 /*  Constant                                Value
+    __cpp_lib_constexpr_new                 202406L [C++26]
     __cpp_lib_destroying_delete             201806L [C++20]
     __cpp_lib_hardware_interference_size    201703L [C++17]
     __cpp_lib_launder                       201606L [C++17]
@@ -26,6 +27,10 @@
 
 #if TEST_STD_VER < 14
 
+# ifdef __cpp_lib_constexpr_new
+#   error "__cpp_lib_constexpr_new should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_destroying_delete
 #   error "__cpp_lib_destroying_delete should not be defined before c++20"
 # endif
@@ -40,6 +45,10 @@
 
 #elif TEST_STD_VER == 14
 
+# ifdef __cpp_lib_constexpr_new
+#   error "__cpp_lib_constexpr_new should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_destroying_delete
 #   error "__cpp_lib_destroying_delete should not be defined before c++20"
 # endif
@@ -54,6 +63,10 @@
 
 #elif TEST_STD_VER == 17
 
+# ifdef __cpp_lib_constexpr_new
+#   error "__cpp_lib_constexpr_new should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_destroying_delete
 #   error "__cpp_lib_destroying_delete should not be defined before c++20"
 # endif
@@ -80,6 +93,10 @@
 
 #elif TEST_STD_VER == 20
 
+# ifdef __cpp_lib_constexpr_new
+#   error "__cpp_lib_constexpr_new should not be defined before c++26"
+# endif
+
 # if TEST_STD_VER > 17 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L
 #   ifndef __cpp_lib_destroying_delete
 #     error "__cpp_lib_destroying_delete should be defined in c++20"
@@ -115,6 +132,10 @@
 
 #elif TEST_STD_VER == 23
 
+# ifdef __cpp_lib_constexpr_new
+#   error "__cpp_lib_constexpr_new should not be defined before c++26"
+# endif
+
 # if TEST_STD_VER > 17 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L
 #   ifndef __cpp_lib_destroying_delete
 #     error "__cpp_lib_destroying_delete should be defined in c++23"
@@ -150,6 +171,19 @@
 
 #elif TEST_STD_VER > 23
 
+# if !defined(_LIBCPP_VERSION)
+#   ifndef __cpp_lib_constexpr_new
+#     error "__cpp_lib_constexpr_new should be defined in c++26"
+#   endif
+#   if __cpp_lib_constexpr_new != 202406L
+#     error "__cpp_lib_constexpr_new should have the value 202406L in c++26"
+#   endif
+# else // _LIBCPP_VERSION
+#   ifdef __cpp_lib_constexpr_new
+#     error "__cpp_lib_constexpr_new should not be defined because it is unimplemented in libc++!"
+#   endif
+# endif
+
 # if TEST_STD_VER > 17 && defined(__cpp_impl_destroying_delete) && __cpp_impl_destroying_delete >= 201806L
 #   ifndef __cpp_lib_destroying_delete
 #     error "__cpp_lib_destroying_delete should be defined in c++26"