Update libcxx to 2 Apr 2024 239236b8c2154aa49e98bc7ed774a7d2712edf50

```
[libc++] Remove pair dependency (#85621)
[libc++] Simplify the implementation of <stddef.h> (#86843)
Update the "Current Status" section of the website to be current. (#84507)
[libc++] Optimize the two range overload of mismatch (#86853)
[libc++] Refactor __tuple_like and __pair_like (#85206)
[libc++][test] Improves src include paths. (#86864)
[libc++] Document guidelines for applying [[nodiscard]] (#84000)
[libc++] Optimize the std::mismatch tail (#83440)
[libc++] Remove <queue> and <stack> includes from <format> (#85520)
[libc++] Switch FreeBSD to C++26 (#86658)
[libc++] Fix one case in saturate_cast.pass.cpp for 64-bit on z/OS (#86724)
[libc++][test] Remove tests that testing std::variant<T&> (#84222)
[libc++] <experimental/simd> Reduce types for template parameter U in tests (#83781)
[libc++] Switch FreeBSD CI job to Clang 17 (#86320)
[libc++][CI] Updates the documentation. (#85264)
[libc++][format] Adds ABI tags to inline constexpr variables. (#86293)
[libc++][test] Fix race condition in condition_variable_any tests (#84788)
[libc++] Vectorize mismatch (#73255)
[libc++] Don't push and pop extensions diagnostics when using clang modules (#85917)
[libc++][ranges] use `static operator()` for C++23 ranges (#86052)
[libc++] Implement LWG3528 (`make_from_tuple` can perform (the equivalent of) a C-style cast) (#85263)
[libc++] Remove macros for keeping std::allocator members and void specialization after C++20 (#85806)
[libc++] Deprecates std::errc constants. (#80542)
[libcxx] [cmake] Fix cmake_path(ABSOLUTE_PATH) for empty CMAKE_INSTALL_PREFIX
[libc++][CI] Reenables the module tests. (#85799)
[libc++][ranges] remove `__workaround_52970` (#85683)
[libc++][ranges] LWG3715: `view_interface::empty` is overconstrained (#85004)
[libcxx] [modules] Fix relative paths with absolute LIBCXX_INSTALL_MODULES_DIR (#85756)
[libc++][format] Fixes nested concept evaluation. (#85548)
[libc++][CMake] Removes LIBCXX_ENABLE_CLANG_TIDY. (#85262)
[libc++] Remove __unconstrained_reverse_iterator (#85582)
[libc++] Simplify the implementation of remove_reference (#85207)
[libcxx][test] Create feature host-can-create-symlinks (#82204)
[libc++] Use __is_scoped_enum for the implementation of is_scoped_enum if it's available (#85580)
[libc++] Add missing hide-from-ABI annotations on virtual functions (#85439)
[libc++] Optimize ranges::fill{,_n} for vector<bool>::iterator (#84642)
[libc++] Add <locale> include in <chrono> (#85521)
[libc++] Remove <locale> includes from <format> (#85478)
[libc++] P2602R2 Poison Pills are Too Toxic (#74534)
[libc++] Fixes run-buildbot-container. (#84644)
[libc++] Add [[nodiscard]] to static numeric limit functions (#83748)
 Rework Modules CMake to be (more) idiomatic. (#84936)
[libc++] Enables TZDB tests. (#82108)
[libc++] Remove a few includes from <__functional/hash.h> (#83254)
[libc++] Implements filebuf unbuffered. (#76629)
[libc++][CI] Updates the version number of the latest release.
[libc++] Remove <tuple> include from <__format/concepts.h> (#80214)
[runtimes] Prefer -fvisibility-global-new-delete=force-hidden (#84917)
[libc++] Fix tests on musl (#85085)
[libc++] Remove _LIBCPP_ENABLE_NARROWING_CONVERSIONS_IN_VARIANT (#83928)
[libcxx] Fix incorrect type in the has-1024-bit-atomics feature test (#84904)
[libc++] Improves UB handling in ios_base destructor. (#76525)
[libc++][CI] Installs tzdata package in Docker. (#84643)
[libc++][TZDB] Fixes parsing interleaved rules. (#84808)
[libc++][hardening] Check bounds on arithmetic in __bounded_iter (#78876)
[libc++][hardening] Add iterator validity checks on unordered containers (#80230)
[libc++][hardening] Reclassify string_view(ptr, len)'s size assertion (#79297)
[libc++] Re-enable the clang_modules_include test for Objective-C++ (#66801)
[libc++] Remove XFAIL for SIMD in optimized build (#84767)
[libcxx] Update 128-bit-atomics feature test (#83841)
[libc++] Only forward-declare ABI-functions in exception_ptr.h if they are meant to be used (#84707)
[libc++][test] Don't include `test_format_context.h` in `parse.pass.cpp` (#83734)
[libc++] Add missing include in test (#84579)
[libc++] Remove <tuple> from <variant> (#83183)
[RFC][libc++] Reworks clang-tidy selection. (#81362)
[libc++] Remove <array> include from <span> (#83742)
[libc++][format] Updates LWG3462 status. (#80550)
[libc++][format] Update LWG3701 status. (#80545)
[libc++][test] Fix MSVC warning C4127 in `array.cons/initialization.pass.cpp` (#79793)
[libc++] Simplify the std::pair constructor overload set (#81448)
[libc++] Allow the use of extensions in the implementation (#79532)
[libc++] Don't build against libcxxrt by default on FreeBSD (#84484)
Actually disable the module generation tests.
[libc++] Disable module_std and module_std_compat tests
[libc++] Enable availability based on the compiler instead of __has_extension (#84065)
[libc++] Fixes time formatter test output for Linux on PowerPC (#75526)
[libc++] Remove unused includes from __type_traits/is_convertible.h (#83747)
```
commit_hash:171258d93ab92f516dfb1789300677a164e63219

19 files changed, 18 insertions, 65 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/concepts.h b/contrib/libs/cxxsupp/libcxx/include/__format/concepts.h
index 299c5f40ee3..13380e9b91a 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/concepts.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/concepts.h
@@ -13,12 +13,14 @@
 #include <__concepts/same_as.h>
 #include <__concepts/semiregular.h>
 #include <__config>
-#include <__format/format_fwd.h>
 #include <__format/format_parse_context.h>
+#include <__fwd/format.h>
+#include <__fwd/tuple.h>
+#include <__tuple/tuple_size.h>
 #include <__type_traits/is_specialization.h>
 #include <__type_traits/remove_const.h>
+#include <__type_traits/remove_reference.h>
 #include <__utility/pair.h>
-#include <tuple>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/container_adaptor.h b/contrib/libs/cxxsupp/libcxx/include/__format/container_adaptor.h
index ec806ef16bf..9f49ca03bf4 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/container_adaptor.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/container_adaptor.h
@@ -18,11 +18,11 @@
 #include <__format/concepts.h>
 #include <__format/formatter.h>
 #include <__format/range_default_formatter.h>
+#include <__fwd/queue.h>
+#include <__fwd/stack.h>
 #include <__ranges/ref_view.h>
 #include <__type_traits/is_const.h>
 #include <__type_traits/maybe_const.h>
-#include <queue>
-#include <stack>
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/escaped_output_table.h b/contrib/libs/cxxsupp/libcxx/include/__format/escaped_output_table.h
index 495a2fbc7b0..e9f4a6e4f63 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/escaped_output_table.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/escaped_output_table.h
@@ -110,7 +110,7 @@ namespace __escaped_output_table {
 /// - bits [0, 10] The size of the range, allowing 2048 elements.
 /// - bits [11, 31] The lower bound code point of the range. The upper bound of
 ///   the range is lower bound + size.
-inline constexpr uint32_t __entries[893] = {
+_LIBCPP_HIDE_FROM_ABI inline constexpr uint32_t __entries[893] = {
     0x00000020,
     0x0003f821,
     0x00056800,
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/extended_grapheme_cluster_table.h b/contrib/libs/cxxsupp/libcxx/include/__format/extended_grapheme_cluster_table.h
index 9616dfecd60..48581d8a5dd 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/extended_grapheme_cluster_table.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/extended_grapheme_cluster_table.h
@@ -125,7 +125,7 @@ enum class __property : uint8_t {
 /// following benchmark.
 /// libcxx/benchmarks/std_format_spec_string_unicode.bench.cpp
 // clang-format off
-inline constexpr uint32_t __entries[1496] = {
+_LIBCPP_HIDE_FROM_ABI inline constexpr uint32_t __entries[1496] = {
     0x00000091,
     0x00005005,
     0x00005811,
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/format_arg.h b/contrib/libs/cxxsupp/libcxx/include/__format/format_arg.h
index b786ac3b362..4924e5fb325 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/format_arg.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/format_arg.h
@@ -14,9 +14,9 @@
 #include <__concepts/arithmetic.h>
 #include <__config>
 #include <__format/concepts.h>
-#include <__format/format_fwd.h>
 #include <__format/format_parse_context.h>
 #include <__functional/invoke.h>
+#include <__fwd/format.h>
 #include <__memory/addressof.h>
 #include <__type_traits/conditional.h>
 #include <__utility/forward.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/format_arg_store.h b/contrib/libs/cxxsupp/libcxx/include/__format/format_arg_store.h
index 066cd369eb8..23a599e9957 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/format_arg_store.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/format_arg_store.h
@@ -151,7 +151,7 @@ consteval __arg_t __determine_arg_t() {
 // The overload for not formattable types allows triggering the static
 // assertion below.
 template <class _Context, class _Tp>
-  requires(!__formattable<_Tp, typename _Context::char_type>)
+  requires(!__formattable_with<_Tp, _Context>)
 consteval __arg_t __determine_arg_t() {
   return __arg_t::__none;
 }
@@ -165,7 +165,6 @@ _LIBCPP_HIDE_FROM_ABI basic_format_arg<_Context> __create_format_arg(_Tp& __valu
   using _Dp               = remove_const_t<_Tp>;
   constexpr __arg_t __arg = __determine_arg_t<_Context, _Dp>();
   static_assert(__arg != __arg_t::__none, "the supplied type is not formattable");
-
   static_assert(__formattable_with<_Tp, _Context>);
 
   // Not all types can be used to directly initialize the
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/format_args.h b/contrib/libs/cxxsupp/libcxx/include/__format/format_args.h
index 9e0afecc0ae..a5fde36a298 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/format_args.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/format_args.h
@@ -10,11 +10,10 @@
 #ifndef _LIBCPP___FORMAT_FORMAT_ARGS_H
 #define _LIBCPP___FORMAT_FORMAT_ARGS_H
 
-#include <__availability>
 #include <__config>
 #include <__format/format_arg.h>
 #include <__format/format_arg_store.h>
-#include <__format/format_fwd.h>
+#include <__fwd/format.h>
 #include <cstddef>
 #include <cstdint>
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/format_context.h b/contrib/libs/cxxsupp/libcxx/include/__format/format_context.h
index 68dcdb49d3a..087d4bf289b 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/format_context.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/format_context.h
@@ -10,7 +10,6 @@
 #ifndef _LIBCPP___FORMAT_FORMAT_CONTEXT_H
 #define _LIBCPP___FORMAT_FORMAT_CONTEXT_H
 
-#include <__availability>
 #include <__concepts/same_as.h>
 #include <__config>
 #include <__format/buffer.h>
@@ -18,7 +17,7 @@
 #include <__format/format_arg_store.h>
 #include <__format/format_args.h>
 #include <__format/format_error.h>
-#include <__format/format_fwd.h>
+#include <__fwd/format.h>
 #include <__iterator/back_insert_iterator.h>
 #include <__iterator/concepts.h>
 #include <__memory/addressof.h>
@@ -27,7 +26,7 @@
 #include <cstddef>
 
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
-#  include <locale>
+#  include <__locale>
 #  include <optional>
 #endif
 
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/format_functions.h b/contrib/libs/cxxsupp/libcxx/include/__format/format_functions.h
index 3ee53539f4e..c7810140105 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/format_functions.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/format_functions.h
@@ -41,7 +41,7 @@
 #include <string_view>
 
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
-#  include <locale>
+#  include <__locale>
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/format_fwd.h b/contrib/libs/cxxsupp/libcxx/include/__format/format_fwd.h
deleted file mode 100644
index 120b2fc8d47..00000000000
--- a/contrib/libs/cxxsupp/libcxx/include/__format/format_fwd.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___FORMAT_FORMAT_FWD_H
-#define _LIBCPP___FORMAT_FORMAT_FWD_H
-
-#include <__availability>
-#include <__config>
-#include <__iterator/concepts.h>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#if _LIBCPP_STD_VER >= 20
-
-template <class _Context>
-class _LIBCPP_TEMPLATE_VIS basic_format_arg;
-
-template <class _OutIt, class _CharT>
-  requires output_iterator<_OutIt, const _CharT&>
-class _LIBCPP_TEMPLATE_VIS basic_format_context;
-
-template <class _Tp, class _CharT = char>
-struct _LIBCPP_TEMPLATE_VIS formatter;
-
-#endif //_LIBCPP_STD_VER >= 20
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // _LIBCPP___FORMAT_FORMAT_FWD_H
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter.h
index 079befc5bd9..e2f418f936e 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter.h
@@ -10,9 +10,8 @@
 #ifndef _LIBCPP___FORMAT_FORMATTER_H
 #define _LIBCPP___FORMAT_FORMATTER_H
 
-#include <__availability>
 #include <__config>
-#include <__format/format_fwd.h>
+#include <__fwd/format.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_bool.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_bool.h
index 5e3daff7b3d..17dc69541e8 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_bool.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_bool.h
@@ -12,7 +12,6 @@
 
 #include <__algorithm/copy.h>
 #include <__assert>
-#include <__availability>
 #include <__config>
 #include <__format/concepts.h>
 #include <__format/format_parse_context.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_char.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_char.h
index 3358d422252..d33e84368a7 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_char.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_char.h
@@ -10,7 +10,6 @@
 #ifndef _LIBCPP___FORMAT_FORMATTER_CHAR_H
 #define _LIBCPP___FORMAT_FORMATTER_CHAR_H
 
-#include <__availability>
 #include <__concepts/same_as.h>
 #include <__config>
 #include <__format/concepts.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_floating_point.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_floating_point.h
index f01d323efff..1d94cc349c0 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_floating_point.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_floating_point.h
@@ -39,7 +39,7 @@
 #include <cstddef>
 
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
-#  include <locale>
+#  include <__locale>
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_integer.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_integer.h
index d57082b3881..41400f00478 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_integer.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_integer.h
@@ -10,7 +10,6 @@
 #ifndef _LIBCPP___FORMAT_FORMATTER_INTEGER_H
 #define _LIBCPP___FORMAT_FORMATTER_INTEGER_H
 
-#include <__availability>
 #include <__concepts/arithmetic.h>
 #include <__config>
 #include <__format/concepts.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_pointer.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_pointer.h
index 3373996ec3d..6941343efd9 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_pointer.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_pointer.h
@@ -10,7 +10,6 @@
 #ifndef _LIBCPP___FORMAT_FORMATTER_POINTER_H
 #define _LIBCPP___FORMAT_FORMATTER_POINTER_H
 
-#include <__availability>
 #include <__config>
 #include <__format/concepts.h>
 #include <__format/format_parse_context.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_string.h b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_string.h
index d1ccfb9b5f7..347439fc8df 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/formatter_string.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/formatter_string.h
@@ -10,7 +10,6 @@
 #ifndef _LIBCPP___FORMAT_FORMATTER_STRING_H
 #define _LIBCPP___FORMAT_FORMATTER_STRING_H
 
-#include <__availability>
 #include <__config>
 #include <__format/concepts.h>
 #include <__format/format_parse_context.h>
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/parser_std_format_spec.h b/contrib/libs/cxxsupp/libcxx/include/__format/parser_std_format_spec.h
index a4b47abff40..9818f37b518 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/parser_std_format_spec.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/parser_std_format_spec.h
@@ -129,8 +129,7 @@ _LIBCPP_HIDE_FROM_ABI constexpr uint32_t __substitute_arg_id(basic_format_arg<_C
 ///
 /// They default to false so when a new field is added it needs to be opted in
 /// explicitly.
-// TODO FMT Use an ABI tag for this struct.
-struct __fields {
+struct _LIBCPP_HIDE_FROM_ABI __fields {
   uint16_t __sign_                 : 1 {false};
   uint16_t __alternate_form_       : 1 {false};
   uint16_t __zero_padding_         : 1 {false};
diff --git a/contrib/libs/cxxsupp/libcxx/include/__format/width_estimation_table.h b/contrib/libs/cxxsupp/libcxx/include/__format/width_estimation_table.h
index cfb488975d5..6309483367f 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__format/width_estimation_table.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__format/width_estimation_table.h
@@ -119,7 +119,7 @@ namespace __width_estimation_table {
 /// - bits [0, 13] The size of the range, allowing 16384 elements.
 /// - bits [14, 31] The lower bound code point of the range. The upper bound of
 ///   the range is lower bound + size.
-inline constexpr uint32_t __entries[108] = {
+_LIBCPP_HIDE_FROM_ABI inline constexpr uint32_t __entries[108] = {
     0x0440005f /* 00001100 - 0000115f [   96] */, //
     0x08c68001 /* 0000231a - 0000231b [    2] */, //
     0x08ca4001 /* 00002329 - 0000232a [    2] */, //