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llvm · Jan 12, 2025 · e36bc1c · e36bc1c
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commit e36bc1c
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Showing 6 changed files with 128 additions and 2 deletions.
diff --git a/libcxx/docs/FeatureTestMacroTable.rst b/libcxx/docs/FeatureTestMacroTable.rst
@@ -404,10 +404,10 @@ Status
     ---------------------------------------------------------- -----------------
     **C++26**
     ----------------------------------------------------------------------------
-    ``__cpp_lib_associative_heterogeneous_insertion``          *unimplemented*
-    ---------------------------------------------------------- -----------------
     ``__cpp_lib_aligned_accessor``                             ``202411L``
     ---------------------------------------------------------- -----------------
+    ``__cpp_lib_associative_heterogeneous_insertion``          *unimplemented*
+    ---------------------------------------------------------- -----------------
     ``__cpp_lib_atomic_min_max``                               *unimplemented*
     ---------------------------------------------------------- -----------------
     ``__cpp_lib_bind_front``                                   ``202306L``

diff --git a/libcxx/include/version b/libcxx/include/version
@@ -16,6 +16,7 @@
 Macro name                                              Value   Headers
 __cpp_lib_adaptor_iterator_pair_constructor             202106L <queue> <stack>
 __cpp_lib_addressof_constexpr                           201603L <memory>
+__cpp_lib_aligned_accessor                              202411L <mdspan>
 __cpp_lib_allocate_at_least                             202302L <memory>
 __cpp_lib_allocator_traits_is_always_equal              201411L <deque> <forward_list> <list>
                                                                 <map> <memory> <scoped_allocator>
@@ -145,6 +146,7 @@ __cpp_lib_is_nothrow_convertible                        201806L <type_traits>
 __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_sufficiently_aligned                       202411L <memory>
 __cpp_lib_is_swappable                                  201603L <type_traits>
 __cpp_lib_is_virtual_base_of                            202406L <type_traits>
 __cpp_lib_is_within_lifetime                            202306L <type_traits>
@@ -523,6 +525,7 @@ __cpp_lib_void_t                                        201411L <type_traits>
 #endif
 
 #if _LIBCPP_STD_VER >= 26
+# define __cpp_lib_aligned_accessor                     202411L
 // # define __cpp_lib_associative_heterogeneous_insertion  202306L
 // # define __cpp_lib_atomic_min_max                       202403L
 # undef  __cpp_lib_bind_front
@@ -551,6 +554,7 @@ __cpp_lib_void_t                                        201411L <type_traits>
 // # define __cpp_lib_generate_random                      202403L
 // # define __cpp_lib_hazard_pointer                       202306L
 // # define __cpp_lib_inplace_vector                       202406L
+# define __cpp_lib_is_sufficiently_aligned              202411L
 # if __has_builtin(__builtin_is_virtual_base_of)
 #   define __cpp_lib_is_virtual_base_of                 202406L
 # endif

diff --git a/...td/language.support/support.limits/support.limits.general/mdspan.version.compile.pass.cpp b/...td/language.support/support.limits/support.limits.general/mdspan.version.compile.pass.cpp
@@ -16,6 +16,7 @@
 // Test the feature test macros defined by <mdspan>
 
 /*  Constant                         Value
+    __cpp_lib_aligned_accessor       202411L [C++26]
     __cpp_lib_freestanding_mdspan    202311L [C++26]
     __cpp_lib_mdspan                 202207L [C++23]
                                      202406L [C++26]
@@ -27,6 +28,10 @@
 
 #if TEST_STD_VER < 14
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_freestanding_mdspan
 #   error "__cpp_lib_freestanding_mdspan should not be defined before c++26"
 # endif
@@ -41,6 +46,10 @@
 
 #elif TEST_STD_VER == 14
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_freestanding_mdspan
 #   error "__cpp_lib_freestanding_mdspan should not be defined before c++26"
 # endif
@@ -55,6 +64,10 @@
 
 #elif TEST_STD_VER == 17
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_freestanding_mdspan
 #   error "__cpp_lib_freestanding_mdspan should not be defined before c++26"
 # endif
@@ -69,6 +82,10 @@
 
 #elif TEST_STD_VER == 20
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_freestanding_mdspan
 #   error "__cpp_lib_freestanding_mdspan should not be defined before c++26"
 # endif
@@ -83,6 +100,10 @@
 
 #elif TEST_STD_VER == 23
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_freestanding_mdspan
 #   error "__cpp_lib_freestanding_mdspan should not be defined before c++26"
 # endif
@@ -100,6 +121,13 @@
 
 #elif TEST_STD_VER > 23
 
+# ifndef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should be defined in c++26"
+# endif
+# if __cpp_lib_aligned_accessor != 202411L
+#   error "__cpp_lib_aligned_accessor should have the value 202411L in c++26"
+# endif
+
 # if !defined(_LIBCPP_VERSION)
 #   ifndef __cpp_lib_freestanding_mdspan
 #     error "__cpp_lib_freestanding_mdspan should be defined in c++26"

diff --git a/...td/language.support/support.limits/support.limits.general/memory.version.compile.pass.cpp b/...td/language.support/support.limits/support.limits.general/memory.version.compile.pass.cpp
@@ -25,6 +25,7 @@
     __cpp_lib_constexpr_memory                    201811L [C++20]
                                                   202202L [C++23]
     __cpp_lib_enable_shared_from_this             201603L [C++17]
+    __cpp_lib_is_sufficiently_aligned             202411L [C++26]
     __cpp_lib_make_unique                         201304L [C++14]
     __cpp_lib_out_ptr                             202106L [C++23]
                                                   202311L [C++26]
@@ -78,6 +79,10 @@
 #   error "__cpp_lib_enable_shared_from_this should not be defined before c++17"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_make_unique
 #   error "__cpp_lib_make_unique should not be defined before c++14"
 # endif
@@ -152,6 +157,10 @@
 #   error "__cpp_lib_enable_shared_from_this should not be defined before c++17"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_make_unique
 #   error "__cpp_lib_make_unique should be defined in c++14"
 # endif
@@ -241,6 +250,10 @@
 #   error "__cpp_lib_enable_shared_from_this should have the value 201603L in c++17"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_make_unique
 #   error "__cpp_lib_make_unique should be defined in c++17"
 # endif
@@ -351,6 +364,10 @@
 #   error "__cpp_lib_enable_shared_from_this should have the value 201603L in c++20"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_make_unique
 #   error "__cpp_lib_make_unique should be defined in c++20"
 # endif
@@ -473,6 +490,10 @@
 #   error "__cpp_lib_enable_shared_from_this should have the value 201603L in c++23"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_make_unique
 #   error "__cpp_lib_make_unique should be defined in c++23"
 # endif
@@ -598,6 +619,13 @@
 #   error "__cpp_lib_enable_shared_from_this should have the value 201603L in c++26"
 # endif
 
+# ifndef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should be defined in c++26"
+# endif
+# if __cpp_lib_is_sufficiently_aligned != 202411L
+#   error "__cpp_lib_is_sufficiently_aligned should have the value 202411L in c++26"
+# endif
+
 # ifndef __cpp_lib_make_unique
 #   error "__cpp_lib_make_unique should be defined in c++26"
 # endif

diff --git a/...d/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp b/...d/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
@@ -18,6 +18,7 @@
 /*  Constant                                                Value
     __cpp_lib_adaptor_iterator_pair_constructor             202106L [C++23]
     __cpp_lib_addressof_constexpr                           201603L [C++17]
+    __cpp_lib_aligned_accessor                              202411L [C++26]
     __cpp_lib_allocate_at_least                             202302L [C++23]
     __cpp_lib_allocator_traits_is_always_equal              201411L [C++17]
     __cpp_lib_any                                           201606L [C++17]
@@ -132,6 +133,7 @@
     __cpp_lib_is_null_pointer                               201309L [C++14]
     __cpp_lib_is_pointer_interconvertible                   201907L [C++20]
     __cpp_lib_is_scoped_enum                                202011L [C++23]
+    __cpp_lib_is_sufficiently_aligned                       202411L [C++26]
     __cpp_lib_is_swappable                                  201603L [C++17]
     __cpp_lib_is_virtual_base_of                            202406L [C++26]
     __cpp_lib_is_within_lifetime                            202306L [C++26]
@@ -264,6 +266,10 @@
 #   error "__cpp_lib_addressof_constexpr should not be defined before c++17"
 # endif
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_allocate_at_least
 #   error "__cpp_lib_allocate_at_least should not be defined before c++23"
 # endif
@@ -704,6 +710,10 @@
 #   error "__cpp_lib_is_scoped_enum should not be defined before c++23"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_is_swappable
 #   error "__cpp_lib_is_swappable should not be defined before c++17"
 # endif
@@ -1126,6 +1136,10 @@
 #   error "__cpp_lib_addressof_constexpr should not be defined before c++17"
 # endif
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_allocate_at_least
 #   error "__cpp_lib_allocate_at_least should not be defined before c++23"
 # endif
@@ -1590,6 +1604,10 @@
 #   error "__cpp_lib_is_scoped_enum should not be defined before c++23"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_is_swappable
 #   error "__cpp_lib_is_swappable should not be defined before c++17"
 # endif
@@ -2063,6 +2081,10 @@
 #   error "__cpp_lib_addressof_constexpr should have the value 201603L in c++17"
 # endif
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_allocate_at_least
 #   error "__cpp_lib_allocate_at_least should not be defined before c++23"
 # endif
@@ -2611,6 +2633,10 @@
 #   error "__cpp_lib_is_scoped_enum should not be defined before c++23"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_is_swappable
 #   error "__cpp_lib_is_swappable should be defined in c++17"
 # endif
@@ -3195,6 +3221,10 @@
 #   error "__cpp_lib_addressof_constexpr should have the value 201603L in c++20"
 # endif
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifdef __cpp_lib_allocate_at_least
 #   error "__cpp_lib_allocate_at_least should not be defined before c++23"
 # endif
@@ -3914,6 +3944,10 @@
 #   error "__cpp_lib_is_scoped_enum should not be defined before c++23"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_is_swappable
 #   error "__cpp_lib_is_swappable should be defined in c++20"
 # endif
@@ -4594,6 +4628,10 @@
 #   error "__cpp_lib_addressof_constexpr should have the value 201603L in c++23"
 # endif
 
+# ifdef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_allocate_at_least
 #   error "__cpp_lib_allocate_at_least should be defined in c++23"
 # endif
@@ -5388,6 +5426,10 @@
 #   error "__cpp_lib_is_scoped_enum should have the value 202011L in c++23"
 # endif
 
+# ifdef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should not be defined before c++26"
+# endif
+
 # ifndef __cpp_lib_is_swappable
 #   error "__cpp_lib_is_swappable should be defined in c++23"
 # endif
@@ -6215,6 +6257,13 @@
 #   error "__cpp_lib_addressof_constexpr should have the value 201603L in c++26"
 # endif
 
+# ifndef __cpp_lib_aligned_accessor
+#   error "__cpp_lib_aligned_accessor should be defined in c++26"
+# endif
+# if __cpp_lib_aligned_accessor != 202411L
+#   error "__cpp_lib_aligned_accessor should have the value 202411L in c++26"
+# endif
+
 # ifndef __cpp_lib_allocate_at_least
 #   error "__cpp_lib_allocate_at_least should be defined in c++26"
 # endif
@@ -7201,6 +7250,13 @@
 #   error "__cpp_lib_is_scoped_enum should have the value 202011L in c++26"
 # endif
 
+# ifndef __cpp_lib_is_sufficiently_aligned
+#   error "__cpp_lib_is_sufficiently_aligned should be defined in c++26"
+# endif
+# if __cpp_lib_is_sufficiently_aligned != 202411L
+#   error "__cpp_lib_is_sufficiently_aligned should have the value 202411L in c++26"
+# endif
+
 # ifndef __cpp_lib_is_swappable
 #   error "__cpp_lib_is_swappable should be defined in c++26"
 # endif

diff --git a/libcxx/utils/generate_feature_test_macro_components.py b/libcxx/utils/generate_feature_test_macro_components.py
@@ -89,6 +89,11 @@ def add_version_header(tc):
             "values": {"c++17": 201603},
             "headers": ["memory"],
         },
+        {
+            "name": "__cpp_lib_aligned_accessor",
+            "values": {"c++26": 202411},
+            "headers": ["mdspan"],
+        },
         {
             "name": "__cpp_lib_allocate_at_least",
             "values": {
@@ -781,6 +786,11 @@ def add_version_header(tc):
             "values": {"c++23": 202011},
             "headers": ["type_traits"],
         },
+        {
+            "name": "__cpp_lib_is_sufficiently_aligned",
+            "values": {"c++26": 202411},
+            "headers": ["memory"],
+        },
         {
             "name": "__cpp_lib_is_swappable",
             "values": {"c++17": 201603},