Import Cobalt 24.master.0.1032339
diff --git a/third_party/llvm-project/libcxx/include/__config b/third_party/llvm-project/libcxx/include/__config
index cb31a35..a5d54d4 100644
--- a/third_party/llvm-project/libcxx/include/__config
+++ b/third_party/llvm-project/libcxx/include/__config
@@ -1,15 +1,16 @@
// -*- C++ -*-
-//===--------------------------- __config ---------------------------------===//
+//===----------------------------------------------------------------------===//
//
-// The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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_CONFIG
-#define _LIBCPP_CONFIG
+#ifndef _LIBCPP___CONFIG
+#define _LIBCPP___CONFIG
+
+#include <__config_site>
#if defined(_MSC_VER) && !defined(__clang__)
# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -18,1362 +19,1227 @@
#endif
#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
-#pragma GCC system_header
+# pragma GCC system_header
+#endif
+
+#if defined(__apple_build_version__)
+# define _LIBCPP_COMPILER_CLANG_BASED
+# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000)
+#elif defined(__clang__)
+# define _LIBCPP_COMPILER_CLANG_BASED
+# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
+#elif defined(__GNUC__)
+# define _LIBCPP_COMPILER_GCC
#endif
#ifdef __cplusplus
-#ifdef __GNUC__
-# define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
-// The _GNUC_VER_NEW macro better represents the new GCC versioning scheme
-// introduced in GCC 5.0.
-# define _GNUC_VER_NEW (_GNUC_VER * 10 + __GNUC_PATCHLEVEL__)
-#else
-# define _GNUC_VER 0
-# define _GNUC_VER_NEW 0
-#endif
+// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
+// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 16.0.1 == 16.00.01), _LIBCPP_VERSION is
+// defined to XXYYZZ.
+# define _LIBCPP_VERSION 160000
-#define _LIBCPP_VERSION 7000
+# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
+# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
-#ifndef _LIBCPP_ABI_VERSION
-# ifdef __Fuchsia__
-# define _LIBCPP_ABI_VERSION 2
-# else
-# define _LIBCPP_ABI_VERSION 1
+// Valid C++ identifier that revs with every libc++ version. This can be used to
+// generate identifiers that must be unique for every released libc++ version.
+# define _LIBCPP_VERSIONED_IDENTIFIER _LIBCPP_CONCAT(v, _LIBCPP_VERSION)
+
+# if __STDC_HOSTED__ == 0
+# define _LIBCPP_FREESTANDING
# endif
-#endif
-#ifndef _LIBCPP_STD_VER
-# if __cplusplus <= 201103L
-# define _LIBCPP_STD_VER 11
-# elif __cplusplus <= 201402L
-# define _LIBCPP_STD_VER 14
-# elif __cplusplus <= 201703L
-# define _LIBCPP_STD_VER 17
+# ifndef _LIBCPP_STD_VER
+# if __cplusplus <= 201103L
+# define _LIBCPP_STD_VER 11
+# elif __cplusplus <= 201402L
+# define _LIBCPP_STD_VER 14
+# elif __cplusplus <= 201703L
+# define _LIBCPP_STD_VER 17
+# elif __cplusplus <= 202002L
+# define _LIBCPP_STD_VER 20
+# else
+// Expected release year of the next C++ standard
+# define _LIBCPP_STD_VER 23
+# endif
+# endif // _LIBCPP_STD_VER
+
+# if defined(__ELF__)
+# define _LIBCPP_OBJECT_FORMAT_ELF 1
+# elif defined(__MACH__)
+# define _LIBCPP_OBJECT_FORMAT_MACHO 1
+# elif defined(_WIN32)
+# define _LIBCPP_OBJECT_FORMAT_COFF 1
+# elif defined(__wasm__)
+# define _LIBCPP_OBJECT_FORMAT_WASM 1
+# elif defined(_AIX)
+# define _LIBCPP_OBJECT_FORMAT_XCOFF 1
# else
-# define _LIBCPP_STD_VER 18 // current year, or date of c++2a ratification
+// ... add new file formats here ...
# endif
-#endif // _LIBCPP_STD_VER
-#if defined(__ELF__)
-# define _LIBCPP_OBJECT_FORMAT_ELF 1
-#elif defined(__MACH__)
-# define _LIBCPP_OBJECT_FORMAT_MACHO 1
-#elif defined(_WIN32)
-# define _LIBCPP_OBJECT_FORMAT_COFF 1
-#elif defined(__wasm__)
-# define _LIBCPP_OBJECT_FORMAT_WASM 1
-#else
-# error Unknown object file format
-#endif
-
-#if defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2
+# if _LIBCPP_ABI_VERSION >= 2
// Change short string representation so that string data starts at offset 0,
// improving its alignment in some cases.
-# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
+# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
// Fix deque iterator type in order to support incomplete types.
-# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
+# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
// Fix undefined behavior in how std::list stores its linked nodes.
-# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB
+# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB
// Fix undefined behavior in how __tree stores its end and parent nodes.
-# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB
+# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB
// Fix undefined behavior in how __hash_table stores its pointer types.
-# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB
-# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB
-# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
-// Don't use a nullptr_t simulation type in C++03 instead using C++11 nullptr
-// provided under the alternate keyword __nullptr, which changes the mangling
-// of nullptr_t. This option is ABI incompatible with GCC in C++03 mode.
-# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR
-// Define the `pointer_safety` enum as a C++11 strongly typed enumeration
-// instead of as a class simulating an enum. If this option is enabled
-// `pointer_safety` and `get_pointer_safety()` will no longer be available
-// in C++03.
-# define _LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE
+# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB
+# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB
+# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
// Define a key function for `bad_function_call` in the library, to centralize
// its vtable and typeinfo to libc++ rather than having all other libraries
// using that class define their own copies.
-# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+// Override the default return value of exception::what() for
+// bad_function_call::what() with a string that is specific to
+// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break
+// because it changes the vtable layout of bad_function_call.
+# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE
// Enable optimized version of __do_get_(un)signed which avoids redundant copies.
-# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
+# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
+// Give reverse_iterator<T> one data member of type T, not two.
+// Also, in C++17 and later, don't derive iterator types from std::iterator.
+# define _LIBCPP_ABI_NO_ITERATOR_BASES
// Use the smallest possible integer type to represent the index of the variant.
-// Previously libc++ used "unsigned int" exclusivly.
-# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
-#elif _LIBCPP_ABI_VERSION == 1
-# if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
+// Previously libc++ used "unsigned int" exclusively.
+# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
+// Unstable attempt to provide a more optimized std::function
+# define _LIBCPP_ABI_OPTIMIZED_FUNCTION
+// All the regex constants must be distinct and nonzero.
+# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO
+// Re-worked external template instantiations for std::string with a focus on
+// performance and fast-path inlining.
+# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION
+// Enable clang::trivial_abi on std::unique_ptr.
+# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI
+// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr
+# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI
+// std::random_device holds some state when it uses an implementation that gets
+// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this
+// implementation to another one on a platform that has already shipped
+// std::random_device, one needs to retain the same object layout to remain ABI
+// compatible. This switch removes these workarounds for platforms that don't care
+// about ABI compatibility.
+# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT
+// Don't export the legacy __basic_string_common class and its methods from the built library.
+# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON
+// Don't export the legacy __vector_base_common class and its methods from the built library.
+# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON
+// According to the Standard, `bitset::operator[] const` returns bool
+# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL
+// Remove the base 10 implementation of std::to_chars from the dylib.
+// The implementation moved to the header, but we still export the symbols from
+// the dylib for backwards compatibility.
+# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
+# elif _LIBCPP_ABI_VERSION == 1
+# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF))
// Enable compiling copies of now inline methods into the dylib to support
// applications compiled against older libraries. This is unnecessary with
// COFF dllexport semantics, since dllexport forces a non-inline definition
// of inline functions to be emitted anyway. Our own non-inline copy would
-// conflict with the dllexport-emitted copy, so we disable it.
-# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
-# endif
+// conflict with the dllexport-emitted copy, so we disable it. For XCOFF,
+// the linker will take issue with the symbols in the shared object if the
+// weak inline methods get visibility (such as from -fvisibility-inlines-hidden),
+// so disable it.
+# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
+# endif
// Feature macros for disabling pre ABI v1 features. All of these options
// are deprecated.
-# if defined(__FreeBSD__)
-# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
+# if defined(__FreeBSD__)
+# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
+# endif
# endif
-#endif
-#ifdef _LIBCPP_TRIVIAL_PAIR_COPY_CTOR
-#error "_LIBCPP_TRIVIAL_PAIR_COPY_CTOR" is no longer supported. \
- use _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR instead
-#endif
+# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2
+// Enable additional explicit instantiations of iostreams components. This
+// reduces the number of weak definitions generated in programs that use
+// iostreams by providing a single strong definition in the shared library.
+# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
-#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
-#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)
+// Define a key function for `bad_function_call` in the library, to centralize
+// its vtable and typeinfo to libc++ rather than having all other libraries
+// using that class define their own copies.
+# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+# endif
-#define _LIBCPP_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)
+# define _LIBCPP_TOSTRING2(x) #x
+# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
-#if __cplusplus < 201103L
-#define _LIBCPP_CXX03_LANG
-#endif
+# if __cplusplus < 201103L
+# define _LIBCPP_CXX03_LANG
+# endif
-#ifndef __has_attribute
-#define __has_attribute(__x) 0
-#endif
+# ifndef __has_attribute
+# define __has_attribute(__x) 0
+# endif
-#ifndef __has_builtin
-#define __has_builtin(__x) 0
-#endif
+# ifndef __has_builtin
+# define __has_builtin(__x) 0
+# endif
-#ifndef __has_extension
-#define __has_extension(__x) 0
-#endif
+# ifndef __has_extension
+# define __has_extension(__x) 0
+# endif
-#ifndef __has_feature
-#define __has_feature(__x) 0
-#endif
+# ifndef __has_feature
+# define __has_feature(__x) 0
+# endif
-#ifndef __has_cpp_attribute
-#define __has_cpp_attribute(__x) 0
-#endif
+# ifndef __has_cpp_attribute
+# define __has_cpp_attribute(__x) 0
+# endif
+
+# ifndef __has_constexpr_builtin
+# define __has_constexpr_builtin(x) 0
+# endif
// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
// the compiler and '1' otherwise.
-#ifndef __is_identifier
-#define __is_identifier(__x) 1
-#endif
-
-#ifndef __has_declspec_attribute
-#define __has_declspec_attribute(__x) 0
-#endif
-
-#define __has_keyword(__x) !(__is_identifier(__x))
-
-#ifndef __has_include
-#define __has_include(...) 0
-#endif
-
-#if defined(__clang__)
-# define _LIBCPP_COMPILER_CLANG
-# ifndef __apple_build_version__
-# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
+# ifndef __is_identifier
+# define __is_identifier(__x) 1
# endif
-#elif defined(__GNUC__)
-# define _LIBCPP_COMPILER_GCC
-#elif defined(_MSC_VER)
-# define _LIBCPP_COMPILER_MSVC
-#elif defined(__IBMCPP__)
-# define _LIBCPP_COMPILER_IBM
-#endif
-#ifndef _LIBCPP_CLANG_VER
-#define _LIBCPP_CLANG_VER 0
-#endif
+# ifndef __has_declspec_attribute
+# define __has_declspec_attribute(__x) 0
+# endif
+
+# define __has_keyword(__x) !(__is_identifier(__x))
+
+# ifndef __has_include
+# define __has_include(...) 0
+# endif
+
+# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L
+# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11"
+# endif
// FIXME: ABI detection should be done via compiler builtin macros. This
// is just a placeholder until Clang implements such macros. For now assume
// that Windows compilers pretending to be MSVC++ target the Microsoft ABI,
// and allow the user to explicitly specify the ABI to handle cases where this
// heuristic falls short.
-#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
-# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
-#elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
-# define _LIBCPP_ABI_ITANIUM
-#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
-# define _LIBCPP_ABI_MICROSOFT
-#else
-# if defined(_WIN32) && defined(_MSC_VER)
+# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
+# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
+# elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
+# define _LIBCPP_ABI_ITANIUM
+# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
# define _LIBCPP_ABI_MICROSOFT
# else
-# define _LIBCPP_ABI_ITANIUM
+# if defined(_WIN32) && defined(_MSC_VER)
+# define _LIBCPP_ABI_MICROSOFT
+# else
+# define _LIBCPP_ABI_ITANIUM
+# endif
# endif
-#endif
+
+# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
+# define _LIBCPP_ABI_VCRUNTIME
+# endif
+
+# if __has_feature(experimental_library)
+# ifndef _LIBCPP_ENABLE_EXPERIMENTAL
+# define _LIBCPP_ENABLE_EXPERIMENTAL
+# endif
+# endif
+
+// Incomplete features get their own specific disabling flags. This makes it
+// easier to grep for target specific flags once the feature is complete.
+# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY)
+# define _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
+# endif
// Need to detect which libc we're using if we're on Linux.
-#if defined(__linux__)
-# include <features.h>
-# if defined(__GLIBC_PREREQ)
-# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
-# else
-# define _LIBCPP_GLIBC_PREREQ(a, b) 0
-# endif // defined(__GLIBC_PREREQ)
-#endif // defined(__linux__)
+# if defined(__linux__)
+# include <features.h>
+# if defined(__GLIBC_PREREQ)
+# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
+# else
+# define _LIBCPP_GLIBC_PREREQ(a, b) 0
+# endif // defined(__GLIBC_PREREQ)
+# endif // defined(__linux__)
-#ifdef __LITTLE_ENDIAN__
-# if __LITTLE_ENDIAN__
+# if defined(__MVS__)
+# include <features.h> // for __NATIVE_ASCII_F
+# endif
+
+# ifdef __LITTLE_ENDIAN__
+# if __LITTLE_ENDIAN__
+# define _LIBCPP_LITTLE_ENDIAN
+# endif // __LITTLE_ENDIAN__
+# endif // __LITTLE_ENDIAN__
+
+# ifdef __BIG_ENDIAN__
+# if __BIG_ENDIAN__
+# define _LIBCPP_BIG_ENDIAN
+# endif // __BIG_ENDIAN__
+# endif // __BIG_ENDIAN__
+
+# ifdef __BYTE_ORDER__
+# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+# define _LIBCPP_LITTLE_ENDIAN
+# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+# define _LIBCPP_BIG_ENDIAN
+# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+# endif // __BYTE_ORDER__
+
+# ifdef __FreeBSD__
+# include <sys/endian.h>
+# include <osreldate.h>
+# if _BYTE_ORDER == _LITTLE_ENDIAN
+# define _LIBCPP_LITTLE_ENDIAN
+# else // _BYTE_ORDER == _LITTLE_ENDIAN
+# define _LIBCPP_BIG_ENDIAN
+# endif // _BYTE_ORDER == _LITTLE_ENDIAN
+# endif // __FreeBSD__
+
+# if defined(__NetBSD__) || defined(__OpenBSD__)
+# include <sys/endian.h>
+# if _BYTE_ORDER == _LITTLE_ENDIAN
+# define _LIBCPP_LITTLE_ENDIAN
+# else // _BYTE_ORDER == _LITTLE_ENDIAN
+# define _LIBCPP_BIG_ENDIAN
+# endif // _BYTE_ORDER == _LITTLE_ENDIAN
+# endif // defined(__NetBSD__) || defined(__OpenBSD__)
+
+# if defined(_WIN32)
+# define _LIBCPP_WIN32API
# define _LIBCPP_LITTLE_ENDIAN
-# endif // __LITTLE_ENDIAN__
-#endif // __LITTLE_ENDIAN__
-
-#ifdef __BIG_ENDIAN__
-# if __BIG_ENDIAN__
-# define _LIBCPP_BIG_ENDIAN
-# endif // __BIG_ENDIAN__
-#endif // __BIG_ENDIAN__
-
-#ifdef __BYTE_ORDER__
-# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-# define _LIBCPP_LITTLE_ENDIAN
-# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-# define _LIBCPP_BIG_ENDIAN
-# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#endif // __BYTE_ORDER__
-
-#ifdef __FreeBSD__
-# include <sys/endian.h>
-# if _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN
-# else // _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_BIG_ENDIAN
-# endif // _BYTE_ORDER == _LITTLE_ENDIAN
-# ifndef __LONG_LONG_SUPPORTED
-# define _LIBCPP_HAS_NO_LONG_LONG
-# endif // __LONG_LONG_SUPPORTED
-#endif // __FreeBSD__
-
-#ifdef __NetBSD__
-# include <sys/endian.h>
-# if _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN
-# else // _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_BIG_ENDIAN
-# endif // _BYTE_ORDER == _LITTLE_ENDIAN
-# define _LIBCPP_HAS_QUICK_EXIT
-#endif // __NetBSD__
-
-#if defined(_WIN32)
-# define _LIBCPP_WIN32API
-# define _LIBCPP_LITTLE_ENDIAN
-# define _LIBCPP_SHORT_WCHAR 1
-// Both MinGW and native MSVC provide a "MSVC"-like enviroment
-# define _LIBCPP_MSVCRT_LIKE
+# define _LIBCPP_SHORT_WCHAR 1
+// Both MinGW and native MSVC provide a "MSVC"-like environment
+# define _LIBCPP_MSVCRT_LIKE
// If mingw not explicitly detected, assume using MS C runtime only if
// a MS compatibility version is specified.
-# if defined(_MSC_VER) && !defined(__MINGW32__)
-# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
-# endif
-# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
-# define _LIBCPP_HAS_BITSCAN64
-# endif
-# define _LIBCPP_HAS_OPEN_WITH_WCHAR
-# if defined(_LIBCPP_MSVCRT)
-# define _LIBCPP_HAS_QUICK_EXIT
-# endif
-
-// Some CRT APIs are unavailable to store apps
-# if defined(WINAPI_FAMILY)
-# include <winapifamily.h>
-# if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \
- (!defined(WINAPI_PARTITION_SYSTEM) || \
- !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM))
-# define _LIBCPP_WINDOWS_STORE_APP
+# if defined(_MSC_VER) && !defined(__MINGW32__)
+# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
# endif
+# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
+# define _LIBCPP_HAS_BITSCAN64
+# endif
+# define _LIBCPP_HAS_OPEN_WITH_WCHAR
+# endif // defined(_WIN32)
+
+# ifdef __sun__
+# include <sys/isa_defs.h>
+# ifdef _LITTLE_ENDIAN
+# define _LIBCPP_LITTLE_ENDIAN
+# else
+# define _LIBCPP_BIG_ENDIAN
+# endif
+# endif // __sun__
+
+# if defined(_AIX) && !defined(__64BIT__)
+// The size of wchar is 2 byte on 32-bit mode on AIX.
+# define _LIBCPP_SHORT_WCHAR 1
# endif
-#endif // defined(_WIN32)
-#ifdef __sun__
-# include <sys/isa_defs.h>
-# ifdef _LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN
-# else
-# define _LIBCPP_BIG_ENDIAN
-# endif
-#endif // __sun__
-
-#if defined(__CloudABI__)
- // Certain architectures provide arc4random(). Prefer using
- // arc4random() over /dev/{u,}random to make it possible to obtain
- // random data even when using sandboxing mechanisms such as chroots,
- // Capsicum, etc.
-# define _LIBCPP_USING_ARC4_RANDOM
-#elif defined(__Fuchsia__)
-# define _LIBCPP_USING_GETENTROPY
-#elif defined(__native_client__)
- // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
- // including accesses to the special files under /dev. C++11's
- // std::random_device is instead exposed through a NaCl syscall.
-# define _LIBCPP_USING_NACL_RANDOM
-#elif defined(_LIBCPP_WIN32API)
-# define _LIBCPP_USING_WIN32_RANDOM
-#else
-# define _LIBCPP_USING_DEV_RANDOM
-#endif
-
-#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
-# include <endian.h>
-# if __BYTE_ORDER == __LITTLE_ENDIAN
-# define _LIBCPP_LITTLE_ENDIAN
-# elif __BYTE_ORDER == __BIG_ENDIAN
-# define _LIBCPP_BIG_ENDIAN
-# else // __BYTE_ORDER == __BIG_ENDIAN
-# error unable to determine endian
-# endif
-#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
-
-#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
-# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
-#else
-# define _LIBCPP_NO_CFI
-#endif
-
-#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
-# if defined(__FreeBSD__)
-# define _LIBCPP_HAS_QUICK_EXIT
-# define _LIBCPP_HAS_C11_FEATURES
+// Libc++ supports various implementations of std::random_device.
+//
+// _LIBCPP_USING_DEV_RANDOM
+// Read entropy from the given file, by default `/dev/urandom`.
+// If a token is provided, it is assumed to be the path to a file
+// to read entropy from. This is the default behavior if nothing
+// else is specified. This implementation requires storing state
+// inside `std::random_device`.
+//
+// _LIBCPP_USING_ARC4_RANDOM
+// Use arc4random(). This allows obtaining random data even when
+// using sandboxing mechanisms. On some platforms like Apple, this
+// is the recommended source of entropy for user-space programs.
+// When this option is used, the token passed to `std::random_device`'s
+// constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_GETENTROPY
+// Use getentropy().
+// When this option is used, the token passed to `std::random_device`'s
+// constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_FUCHSIA_CPRNG
+// Use Fuchsia's zx_cprng_draw() system call, which is specified to
+// deliver high-quality entropy and cannot fail.
+// When this option is used, the token passed to `std::random_device`'s
+// constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_NACL_RANDOM
+// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
+// including accesses to the special files under `/dev`. This implementation
+// uses the NaCL syscall `nacl_secure_random_init()` to get entropy.
+// When this option is used, the token passed to `std::random_device`'s
+// constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_WIN32_RANDOM
+// Use rand_s(), for use on Windows.
+// When this option is used, the token passed to `std::random_device`'s
+// constructor *must* be "/dev/urandom" -- anything else is an error.
+# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
+ defined(__DragonFly__) || defined(__sun__)
+# define _LIBCPP_USING_ARC4_RANDOM
+# elif defined(__wasi__) || defined(__EMSCRIPTEN__)
+# define _LIBCPP_USING_GETENTROPY
# elif defined(__Fuchsia__)
-# define _LIBCPP_HAS_QUICK_EXIT
-# define _LIBCPP_HAS_TIMESPEC_GET
-# define _LIBCPP_HAS_C11_FEATURES
-# elif defined(__linux__)
-# if !defined(_LIBCPP_HAS_MUSL_LIBC)
-# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__)
-# define _LIBCPP_HAS_QUICK_EXIT
-# endif
-# if _LIBCPP_GLIBC_PREREQ(2, 17)
-# define _LIBCPP_HAS_C11_FEATURES
-# define _LIBCPP_HAS_TIMESPEC_GET
-# endif
-# else // defined(_LIBCPP_HAS_MUSL_LIBC)
-# define _LIBCPP_HAS_QUICK_EXIT
-# define _LIBCPP_HAS_TIMESPEC_GET
-# define _LIBCPP_HAS_C11_FEATURES
+# define _LIBCPP_USING_FUCHSIA_CPRNG
+# elif defined(__native_client__)
+# define _LIBCPP_USING_NACL_RANDOM
+# elif defined(_LIBCPP_WIN32API)
+# define _LIBCPP_USING_WIN32_RANDOM
+# else
+# define _LIBCPP_USING_DEV_RANDOM
+# endif
+
+# if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
+# include <endian.h>
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+# define _LIBCPP_LITTLE_ENDIAN
+# elif __BYTE_ORDER == __BIG_ENDIAN
+# define _LIBCPP_BIG_ENDIAN
+# else // __BYTE_ORDER == __BIG_ENDIAN
+# error unable to determine endian
# endif
-# endif // __linux__
-#endif
+# endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
-#if defined(_LIBCPP_COMPILER_CLANG)
+# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
+# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
+# else
+# define _LIBCPP_NO_CFI
+# endif
-// _LIBCPP_ALTERNATE_STRING_LAYOUT is an old name for
-// _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT left here for backward compatibility.
-#if (defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \
- (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)) || \
- defined(_LIBCPP_ALTERNATE_STRING_LAYOUT)
-#define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
-#endif
+# ifndef _LIBCPP_CXX03_LANG
-#if __has_feature(cxx_alignas)
-# define _ALIGNAS_TYPE(x) alignas(x)
-# define _ALIGNAS(x) alignas(x)
-#else
-# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
-# define _ALIGNAS(x) __attribute__((__aligned__(x)))
-#endif
+# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
+# define _ALIGNAS_TYPE(x) alignas(x)
+# define _ALIGNAS(x) alignas(x)
+# define _LIBCPP_NORETURN [[noreturn]]
+# define _NOEXCEPT noexcept
+# define _NOEXCEPT_(x) noexcept(x)
+# define _LIBCPP_CONSTEXPR constexpr
-#if __cplusplus < 201103L
+# else
+
+# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
+# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
+# define _ALIGNAS(x) __attribute__((__aligned__(x)))
+# define _LIBCPP_NORETURN __attribute__((__noreturn__))
+# define _LIBCPP_HAS_NO_NOEXCEPT
+# define nullptr __nullptr
+# define _NOEXCEPT throw()
+# define _NOEXCEPT_(x)
+# define static_assert(...) _Static_assert(__VA_ARGS__)
+# define decltype(...) __decltype(__VA_ARGS__)
+# define _LIBCPP_CONSTEXPR
+
typedef __char16_t char16_t;
typedef __char32_t char32_t;
-#endif
-#if !(__has_feature(cxx_exceptions)) && !defined(_LIBCPP_NO_EXCEPTIONS)
-#define _LIBCPP_NO_EXCEPTIONS
-#endif
-
-#if !(__has_feature(cxx_rtti)) && !defined(_LIBCPP_NO_RTTI)
-#define _LIBCPP_NO_RTTI
-#endif
-
-#if !(__has_feature(cxx_strong_enums))
-#define _LIBCPP_HAS_NO_STRONG_ENUMS
-#endif
-
-#if !(__has_feature(cxx_decltype))
-#define _LIBCPP_HAS_NO_DECLTYPE
-#endif
-
-#if __has_feature(cxx_attributes)
-# define _LIBCPP_NORETURN [[noreturn]]
-#else
-# define _LIBCPP_NORETURN __attribute__ ((noreturn))
-#endif
-
-#if !(__has_feature(cxx_lambdas))
-#define _LIBCPP_HAS_NO_LAMBDAS
-#endif
-
-#if !(__has_feature(cxx_nullptr))
-# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR)
-# define nullptr __nullptr
-# else
-# define _LIBCPP_HAS_NO_NULLPTR
# endif
-#endif
-#if !(__has_feature(cxx_rvalue_references))
-#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
-#endif
+# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L
+# define _LIBCPP_NO_EXCEPTIONS
+# endif
-#if !(__has_feature(cxx_auto_type))
-#define _LIBCPP_HAS_NO_AUTO_TYPE
-#endif
+# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
-#if !(__has_feature(cxx_variadic_templates))
-#define _LIBCPP_HAS_NO_VARIADICS
-#endif
+# if defined(_LIBCPP_COMPILER_CLANG_BASED)
-#if !(__has_feature(cxx_generalized_initializers))
-#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
-#endif
-
-#if __has_feature(is_base_of)
-#define _LIBCPP_HAS_IS_BASE_OF
-#endif
-
-#if __has_feature(is_final)
-#define _LIBCPP_HAS_IS_FINAL
-#endif
+# if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)
+# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
+# endif
// Objective-C++ features (opt-in)
-#if __has_feature(objc_arc)
-#define _LIBCPP_HAS_OBJC_ARC
-#endif
+# if __has_feature(objc_arc)
+# define _LIBCPP_HAS_OBJC_ARC
+# endif
-#if __has_feature(objc_arc_weak)
-#define _LIBCPP_HAS_OBJC_ARC_WEAK
-#endif
+# if __has_feature(objc_arc_weak)
+# define _LIBCPP_HAS_OBJC_ARC_WEAK
+# endif
-#if !(__has_feature(cxx_constexpr))
-#define _LIBCPP_HAS_NO_CONSTEXPR
-#endif
+# if __has_extension(blocks)
+# define _LIBCPP_HAS_EXTENSION_BLOCKS
+# endif
-#if !(__has_feature(cxx_relaxed_constexpr))
-#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
-#endif
+# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__)
+# define _LIBCPP_HAS_BLOCKS_RUNTIME
+# endif
-#if !(__has_feature(cxx_variable_templates))
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-#endif
-
-#if !(__has_feature(cxx_noexcept))
-#define _LIBCPP_HAS_NO_NOEXCEPT
-#endif
-
-#if __has_feature(underlying_type)
-#define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T)
-#endif
-
-#if __has_feature(is_literal)
-#define _LIBCPP_IS_LITERAL(T) __is_literal(T)
-#endif
-
-// Inline namespaces are available in Clang regardless of C++ dialect.
-#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
-#define _LIBCPP_END_NAMESPACE_STD } }
-#define _VSTD std::_LIBCPP_NAMESPACE
-
-namespace std {
- inline namespace _LIBCPP_NAMESPACE {
- }
-}
-
-#if !defined(_LIBCPP_HAS_NO_ASAN) && !__has_feature(address_sanitizer)
-#define _LIBCPP_HAS_NO_ASAN
-#endif
+# if !__has_feature(address_sanitizer)
+# define _LIBCPP_HAS_NO_ASAN
+# endif
// Allow for build-time disabling of unsigned integer sanitization
-#if !defined(_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK) && __has_attribute(no_sanitize)
-#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
-#endif
+# if __has_attribute(no_sanitize)
+# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
+# endif
-#if __has_builtin(__builtin_launder)
-#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
-#endif
+# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))
-#if !__is_identifier(__has_unique_object_representations)
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
-#endif
+# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
-#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
+# elif defined(_LIBCPP_COMPILER_GCC)
-#elif defined(_LIBCPP_COMPILER_GCC)
+# if !defined(__SANITIZE_ADDRESS__)
+# define _LIBCPP_HAS_NO_ASAN
+# endif
-#define _ALIGNAS(x) __attribute__((__aligned__(x)))
-#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
+# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))
-#define _LIBCPP_NORETURN __attribute__((noreturn))
+# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
-#if _GNUC_VER >= 407
-#define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T)
-#define _LIBCPP_IS_LITERAL(T) __is_literal_type(T)
-#define _LIBCPP_HAS_IS_FINAL
-#endif
+# endif // _LIBCPP_COMPILER_[CLANG|GCC]
-#if defined(__GNUC__) && _GNUC_VER >= 403
-#define _LIBCPP_HAS_IS_BASE_OF
-#endif
+# if defined(_LIBCPP_OBJECT_FORMAT_COFF)
-#if !__EXCEPTIONS && !defined(_LIBCPP_NO_EXCEPTIONS)
-#define _LIBCPP_NO_EXCEPTIONS
-#endif
-
-// constexpr was added to GCC in 4.6.
-#if _GNUC_VER < 406
-# define _LIBCPP_HAS_NO_CONSTEXPR
-// Can only use constexpr in c++11 mode.
-#elif !defined(__GXX_EXPERIMENTAL_CXX0X__) && __cplusplus < 201103L
-# define _LIBCPP_HAS_NO_CONSTEXPR
-#endif
-
-// Determine if GCC supports relaxed constexpr
-#if !defined(__cpp_constexpr) || __cpp_constexpr < 201304L
-#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
-#endif
-
-// GCC 5 will support variable templates
-#if !defined(__cpp_variable_templates) || __cpp_variable_templates < 201304L
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-#endif
-
-#ifndef __GXX_EXPERIMENTAL_CXX0X__
-
-#define _LIBCPP_HAS_NO_DECLTYPE
-#define _LIBCPP_HAS_NO_NULLPTR
-#define _LIBCPP_HAS_NO_UNICODE_CHARS
-#define _LIBCPP_HAS_NO_VARIADICS
-#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
-#define _LIBCPP_HAS_NO_STRONG_ENUMS
-#define _LIBCPP_HAS_NO_NOEXCEPT
-
-#else // __GXX_EXPERIMENTAL_CXX0X__
-
-#if _GNUC_VER < 403
-#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
-#endif
-
-
-#if _GNUC_VER < 404
-#define _LIBCPP_HAS_NO_DECLTYPE
-#define _LIBCPP_HAS_NO_UNICODE_CHARS
-#define _LIBCPP_HAS_NO_VARIADICS
-#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
-#endif // _GNUC_VER < 404
-
-#if _GNUC_VER < 406
-#define _LIBCPP_HAS_NO_NOEXCEPT
-#define _LIBCPP_HAS_NO_NULLPTR
-#endif
-
-#endif // __GXX_EXPERIMENTAL_CXX0X__
-
-#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_NAMESPACE {
-#define _LIBCPP_END_NAMESPACE_STD } }
-#define _VSTD std::_LIBCPP_NAMESPACE
-
-namespace std {
- inline namespace _LIBCPP_NAMESPACE {
- }
-}
-
-#if !defined(_LIBCPP_HAS_NO_ASAN) && !defined(__SANITIZE_ADDRESS__)
-#define _LIBCPP_HAS_NO_ASAN
-#endif
-
-#if _GNUC_VER >= 700
-#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
-#endif
-
-#if _GNUC_VER >= 700
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
-#endif
-
-#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
-
-#elif defined(_LIBCPP_COMPILER_MSVC)
-
-#define _LIBCPP_TOSTRING2(x) #x
-#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
-#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x))
-
-#if _MSC_VER < 1900
-#error "MSVC versions prior to Visual Studio 2015 are not supported"
-#endif
-
-#define _LIBCPP_HAS_IS_BASE_OF
-#define _LIBCPP_HAS_NO_CONSTEXPR
-#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-#define _LIBCPP_HAS_NO_NOEXCEPT
-#define __alignof__ __alignof
-#define _LIBCPP_NORETURN __declspec(noreturn)
-#define _ALIGNAS(x) __declspec(align(x))
-#define _ALIGNAS_TYPE(x) alignas(x)
-#define _LIBCPP_HAS_NO_VARIADICS
-
-#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {
-#define _LIBCPP_END_NAMESPACE_STD }
-#define _VSTD std
-
-namespace std {
-}
-
-#define _LIBCPP_WEAK
-
-#define _LIBCPP_HAS_NO_ASAN
-
-#define _LIBCPP_ALWAYS_INLINE __forceinline
-
-#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
-
-#elif defined(_LIBCPP_COMPILER_IBM)
-
-#define _ALIGNAS(x) __attribute__((__aligned__(x)))
-#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
-#define _ATTRIBUTE(x) __attribute__((x))
-#define _LIBCPP_NORETURN __attribute__((noreturn))
-
-#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
-#define _LIBCPP_HAS_NO_NOEXCEPT
-#define _LIBCPP_HAS_NO_NULLPTR
-#define _LIBCPP_HAS_NO_UNICODE_CHARS
-#define _LIBCPP_HAS_IS_BASE_OF
-#define _LIBCPP_HAS_IS_FINAL
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-
-#if defined(_AIX)
-#define __MULTILOCALE_API
-#endif
-
-#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
-#define _LIBCPP_END_NAMESPACE_STD } }
-#define _VSTD std::_LIBCPP_NAMESPACE
-
-namespace std {
- inline namespace _LIBCPP_NAMESPACE {
- }
-}
-
-#define _LIBCPP_HAS_NO_ASAN
-
-#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
-
-#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
-
-#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM]
-
-#if _LIBCPP_STD_VER >= 17
-#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
- _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
-#else
-#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
- _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
-#endif
-
-#define _LIBCPP_END_NAMESPACE_FILESYSTEM \
- _LIBCPP_END_NAMESPACE_STD } }
-
-#define _VSTD_FS _VSTD::__fs::filesystem
-
-
-#if defined(_LIBCPP_OBJECT_FORMAT_COFF)
-
-#ifdef _DLL
-# define _LIBCPP_CRT_FUNC __declspec(dllimport)
-#else
-# define _LIBCPP_CRT_FUNC
-#endif
-
-#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# define _LIBCPP_DLL_VIS
-# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-# define _LIBCPP_OVERRIDABLE_FUNC_VIS
-#elif defined(_LIBCPP_BUILDING_LIBRARY)
-# define _LIBCPP_DLL_VIS __declspec(dllexport)
-# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
-# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
-#else
-# define _LIBCPP_DLL_VIS __declspec(dllimport)
-# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
-# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-# define _LIBCPP_OVERRIDABLE_FUNC_VIS
-#endif
-
-#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS
-#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
-#define _LIBCPP_EXTERN_VIS _LIBCPP_DLL_VIS
-#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
-#define _LIBCPP_HIDDEN
-#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
-#define _LIBCPP_TEMPLATE_VIS
-#define _LIBCPP_ENUM_VIS
-
-#if defined(_LIBCPP_COMPILER_MSVC)
-# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __forceinline
-#else
-# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__ ((__always_inline__))
-#endif
-
-#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
-
-#ifndef _LIBCPP_HIDDEN
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
-# else
-# define _LIBCPP_HIDDEN
-# endif
-#endif
-
-#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-// The inline should be removed once PR32114 is resolved
-# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
-# else
-# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
-# endif
-#endif
-
-#ifndef _LIBCPP_FUNC_VIS
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
-# else
-# define _LIBCPP_FUNC_VIS
-# endif
-#endif
-
-#ifndef _LIBCPP_TYPE_VIS
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
-# else
-# define _LIBCPP_TYPE_VIS
-# endif
-#endif
-
-#ifndef _LIBCPP_TEMPLATE_VIS
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# if __has_attribute(__type_visibility__)
-# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default")))
+# ifdef _DLL
+# define _LIBCPP_CRT_FUNC __declspec(dllimport)
# else
-# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default")))
+# define _LIBCPP_CRT_FUNC
+# endif
+
+# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY))
+# define _LIBCPP_DLL_VIS
+# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
+# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+# define _LIBCPP_OVERRIDABLE_FUNC_VIS
+# define _LIBCPP_EXPORTED_FROM_ABI
+# elif defined(_LIBCPP_BUILDING_LIBRARY)
+# define _LIBCPP_DLL_VIS __declspec(dllexport)
+# if defined(__MINGW32__)
+# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
+# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+# else
+# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
+# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
+# endif
+# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
+# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)
+# else
+# define _LIBCPP_DLL_VIS __declspec(dllimport)
+# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
+# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+# define _LIBCPP_OVERRIDABLE_FUNC_VIS
+# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)
+# endif
+
+# define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS
+# define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
+# define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
+# define _LIBCPP_HIDDEN
+# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
+# define _LIBCPP_TEMPLATE_VIS
+# define _LIBCPP_TEMPLATE_DATA_VIS
+# define _LIBCPP_ENUM_VIS
+
+# else
+
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis)))
+# else
+# define _LIBCPP_VISIBILITY(vis)
+# endif
+
+# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden")
+# define _LIBCPP_FUNC_VIS _LIBCPP_VISIBILITY("default")
+# define _LIBCPP_TYPE_VIS _LIBCPP_VISIBILITY("default")
+# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default")
+# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default")
+# define _LIBCPP_EXCEPTION_ABI _LIBCPP_VISIBILITY("default")
+# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default")
+# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+
+// TODO: Make this a proper customization point or remove the option to override it.
+# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
+# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default")
+# endif
+
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+// The inline should be removed once PR32114 is resolved
+# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
+# else
+# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
+# endif
+
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+# if __has_attribute(__type_visibility__)
+# define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default")))
+# else
+# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default")))
+# endif
+# else
+# define _LIBCPP_TEMPLATE_VIS
+# endif
+
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
+# define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default")))
+# else
+# define _LIBCPP_ENUM_VIS
+# endif
+
+# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
+
+# if __has_attribute(exclude_from_explicit_instantiation)
+# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__))
+# else
+// Try to approximate the effect of exclude_from_explicit_instantiation
+// (which is that entities are not assumed to be provided by explicit
+// template instantiations in the dylib) by always inlining those entities.
+# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE
+# endif
+
+// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved
+// on two levels:
+// 1. The symbol is given hidden visibility, which ensures that users won't start exporting
+// symbols from their dynamic library by means of using the libc++ headers. This ensures
+// that those symbols stay private to the dynamic library in which it is defined.
+//
+// 2. The symbol is given an ABI tag that changes with each version of libc++. This ensures
+// that no ODR violation can arise from mixing two TUs compiled with different versions
+// of libc++ where we would have changed the definition of a symbol. If the symbols shared
+// the same name, the ODR would require that their definitions be token-by-token equivalent,
+// which basically prevents us from being able to make any change to any function in our
+// headers. Using this ABI tag ensures that the symbol name is "bumped" artificially at
+// each release, which lets us change the definition of these symbols at our leisure.
+// Note that historically, this has been achieved in various ways, including force-inlining
+// all functions or giving internal linkage to all functions. Both these (previous) solutions
+// suffer from drawbacks that lead notably to code bloat.
+//
+// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend
+// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library.
+//
+// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions
+// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled
+// name of a virtual function is part of its ABI, since some architectures like arm64e can sign
+// the virtual function pointer in the vtable based on the mangled name of the function. Since
+// we use an ABI tag that changes with each released version, the mangled name of the virtual
+// function would change, which is incorrect. Note that it doesn't make much sense to change
+// the implementation of a virtual function in an ABI-incompatible way in the first place,
+// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable.
+//
+// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing
+// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and
+// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70.
+# ifndef _LIBCPP_NO_ABI_TAG
+# define _LIBCPP_HIDE_FROM_ABI \
+ _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \
+ __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER))))
+# else
+# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
+# endif
+# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
+
+# ifdef _LIBCPP_BUILDING_LIBRARY
+# if _LIBCPP_ABI_VERSION > 1
+# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
+# else
+# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
# endif
# else
-# define _LIBCPP_TEMPLATE_VIS
+# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
# endif
-#endif
-#ifndef _LIBCPP_EXTERN_VIS
-#define _LIBCPP_EXTERN_VIS
-#endif
+// Just so we can migrate to the new macros gradually.
+# define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
-#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
-#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS
-#endif
+// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
+// clang-format off
+# define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
+# define _LIBCPP_END_NAMESPACE_STD }}
+# define _VSTD std
-#ifndef _LIBCPP_EXCEPTION_ABI
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
+_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
+
+# if _LIBCPP_STD_VER > 14
+# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
+ _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
# else
-# define _LIBCPP_EXCEPTION_ABI
+# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
+ _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
# endif
-#endif
-#ifndef _LIBCPP_ENUM_VIS
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
-# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default")))
-# else
-# define _LIBCPP_ENUM_VIS
-# endif
-#endif
+# define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }}
+// clang-format on
-#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
-# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default")))
-# else
-# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-# endif
-#endif
+# define _VSTD_FS std::__fs::filesystem
-#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#endif
-
-#if __has_attribute(internal_linkage)
-# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage))
-#else
-# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE
-#endif
-
-#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU
-# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT
-# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0
-# else
-# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1
-# endif
-#endif
-
-#ifndef _LIBCPP_HIDE_FROM_ABI
-# if _LIBCPP_HIDE_FROM_ABI_PER_TU
-# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE
-# else
-# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_ALWAYS_INLINE
-# endif
-#endif
-
-// Just so we can migrate to _LIBCPP_HIDE_FROM_ABI gradually.
-#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
-
-#ifndef _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY
-# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__((__visibility__("default"), __always_inline__))
-# else
-# define _LIBCPP_EXTERN_TEMPLATE_INLINE_VISIBILITY __attribute__((__always_inline__))
-# endif
-#endif
-
-#ifndef _LIBCPP_PREFERRED_OVERLOAD
# if __has_attribute(__enable_if__)
-# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, "")))
+# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, "")))
# endif
-#endif
-#ifndef _LIBCPP_HAS_NO_NOEXCEPT
-# define _NOEXCEPT noexcept
-# define _NOEXCEPT_(x) noexcept(x)
-#else
-# define _NOEXCEPT throw()
-# define _NOEXCEPT_(x)
-#endif
-
-#if defined(_LIBCPP_DEBUG_USE_EXCEPTIONS)
-# if !defined(_LIBCPP_DEBUG)
-# error cannot use _LIBCPP_DEBUG_USE_EXCEPTIONS unless _LIBCPP_DEBUG is defined
+# ifndef __SIZEOF_INT128__
+# define _LIBCPP_HAS_NO_INT128
# endif
-# ifdef _LIBCPP_HAS_NO_NOEXCEPT
-# define _NOEXCEPT_DEBUG
-# define _NOEXCEPT_DEBUG_(x)
+
+# ifndef __cpp_consteval
+# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR
# else
-# define _NOEXCEPT_DEBUG noexcept(false)
-# define _NOEXCEPT_DEBUG_(x) noexcept(false)
+# define _LIBCPP_CONSTEVAL consteval
# endif
-#else
-# define _NOEXCEPT_DEBUG _NOEXCEPT
-# define _NOEXCEPT_DEBUG_(x) _NOEXCEPT_(x)
-#endif
-#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
-typedef unsigned short char16_t;
-typedef unsigned int char32_t;
-#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
-
-#ifndef __SIZEOF_INT128__
-#define _LIBCPP_HAS_NO_INT128
-#endif
-
-#ifdef _LIBCPP_CXX03_LANG
-# if __has_extension(c_static_assert)
-# define static_assert(__b, __m) _Static_assert(__b, __m)
+# if __has_attribute(__malloc__)
+# define _LIBCPP_NOALIAS __attribute__((__malloc__))
# else
-extern "C++" {
-template <bool> struct __static_assert_test;
-template <> struct __static_assert_test<true> {};
-template <unsigned> struct __static_assert_check {};
-}
-# define static_assert(__b, __m) \
- typedef __static_assert_check<sizeof(__static_assert_test<(__b)>)> \
- _LIBCPP_CONCAT(__t, __LINE__)
-# endif // __has_extension(c_static_assert)
-#endif // _LIBCPP_CXX03_LANG
+# define _LIBCPP_NOALIAS
+# endif
-#ifdef _LIBCPP_HAS_NO_DECLTYPE
-// GCC 4.6 provides __decltype in all standard modes.
-# if __has_keyword(__decltype) || _LIBCPP_CLANG_VER >= 304 || _GNUC_VER >= 406
-# define decltype(__x) __decltype(__x)
+# if __has_attribute(__using_if_exists__)
+# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__))
# else
-# define decltype(__x) __typeof__(__x)
+# define _LIBCPP_USING_IF_EXISTS
# endif
-#endif
-#ifdef _LIBCPP_HAS_NO_CONSTEXPR
-# define _LIBCPP_CONSTEXPR
-#else
-# define _LIBCPP_CONSTEXPR constexpr
-#endif
+# ifdef _LIBCPP_CXX03_LANG
+# define _LIBCPP_DECLARE_STRONG_ENUM(x) \
+ struct _LIBCPP_TYPE_VIS x { \
+ enum __lx
+// clang-format off
+# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
+ __lx __v_; \
+ _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \
+ _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
+ _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; } \
+ };
+// clang-format on
-#ifdef _LIBCPP_CXX03_LANG
-# define _LIBCPP_DEFAULT {}
-#else
-# define _LIBCPP_DEFAULT = default;
-#endif
+# else // _LIBCPP_CXX03_LANG
+# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
+# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
+# endif // _LIBCPP_CXX03_LANG
-#ifdef _LIBCPP_CXX03_LANG
-# define _LIBCPP_EQUAL_DELETE
-#else
-# define _LIBCPP_EQUAL_DELETE = delete
-#endif
-
-#ifdef __GNUC__
-# define _NOALIAS __attribute__((__malloc__))
-#else
-# define _NOALIAS
-#endif
-
-#if __has_feature(cxx_explicit_conversions) || defined(__IBMCPP__) || \
- (!defined(_LIBCPP_CXX03_LANG) && defined(__GNUC__)) // All supported GCC versions
-# define _LIBCPP_EXPLICIT explicit
-#else
-# define _LIBCPP_EXPLICIT
-#endif
-
-#if !__has_builtin(__builtin_operator_new) || !__has_builtin(__builtin_operator_delete)
-#define _LIBCPP_HAS_NO_BUILTIN_OPERATOR_NEW_DELETE
-#endif
-
-#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
-# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
-# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
- __lx __v_; \
- _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \
- _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
- _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \
- };
-#else // _LIBCPP_HAS_NO_STRONG_ENUMS
-# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
-# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
-#endif // _LIBCPP_HAS_NO_STRONG_ENUMS
-
-#ifdef _LIBCPP_DEBUG
-# if _LIBCPP_DEBUG == 0
-# define _LIBCPP_DEBUG_LEVEL 1
-# elif _LIBCPP_DEBUG == 1
-# define _LIBCPP_DEBUG_LEVEL 2
-# else
-# error Supported values for _LIBCPP_DEBUG are 0 and 1
+# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) || \
+ defined(__NetBSD__)
+# define _LIBCPP_LOCALE__L_EXTENSIONS 1
# endif
-# if !defined(_LIBCPP_BUILDING_LIBRARY)
-# define _LIBCPP_EXTERN_TEMPLATE(...)
+
+# ifdef __FreeBSD__
+# define _DECLARE_C99_LDBL_MATH 1
# endif
-#endif
-
-#ifdef _LIBCPP_DISABLE_EXTERN_TEMPLATE
-#define _LIBCPP_EXTERN_TEMPLATE(...)
-#define _LIBCPP_EXTERN_TEMPLATE2(...)
-#endif
-
-#ifndef _LIBCPP_EXTERN_TEMPLATE
-#define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
-#endif
-
-#ifndef _LIBCPP_EXTERN_TEMPLATE2
-#define _LIBCPP_EXTERN_TEMPLATE2(...) extern template __VA_ARGS__;
-#endif
-
-#if defined(__APPLE__) && defined(__LP64__) && !defined(__x86_64__)
-#define _LIBCPP_NONUNIQUE_RTTI_BIT (1ULL << 63)
-#endif
-
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \
- defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__)
-#define _LIBCPP_LOCALE__L_EXTENSIONS 1
-#endif
-
-#include "starboard/configuration.h"
-#if !SB_IS(EVERGREEN)
-#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
-// Most unix variants have catopen. These are the specific ones that don't.
-# if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION)
-# define _LIBCPP_HAS_CATOPEN 1
-# endif
-#endif
-#endif // !SB_IS(EVERGREEN)
-
-#ifdef __FreeBSD__
-#define _DECLARE_C99_LDBL_MATH 1
-#endif
// If we are getting operator new from the MSVC CRT, then allocation overloads
// for align_val_t were added in 19.12, aka VS 2017 version 15.3.
-#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
-#define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
-#endif
-
-#if defined(__APPLE__)
-# if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
- defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
-# define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
+# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
+# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
+// We're deferring to Microsoft's STL to provide aligned new et al. We don't
+// have it unless the language feature test macro is defined.
+# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
+# elif defined(__MVS__)
+# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
# endif
-# if defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
-# if __MAC_OS_X_VERSION_MIN_REQUIRED < 1060
-# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
+
+# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
+# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
+# endif
+
+// It is not yet possible to use aligned_alloc() on all Apple platforms since
+// 10.15 was the first version to ship an implementation of aligned_alloc().
+# if defined(__APPLE__)
+# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
+ __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500)
+# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC
# endif
+# elif defined(__ANDROID__) && __ANDROID_API__ < 28
+// Android only provides aligned_alloc when targeting API 28 or higher.
+# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC
# endif
-#endif // defined(__APPLE__)
-#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \
- !defined(_LIBCPP_BUILDING_LIBRARY) && \
- (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
-# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
-#endif
+# if defined(__APPLE__) || defined(__FreeBSD__)
+# define _LIBCPP_HAS_DEFAULTRUNELOCALE
+# endif
-#if defined(__APPLE__) || defined(__FreeBSD__)
-#define _LIBCPP_HAS_DEFAULTRUNELOCALE
-#endif
+# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
+# define _LIBCPP_WCTYPE_IS_MASK
+# endif
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
-#define _LIBCPP_WCTYPE_IS_MASK
-#endif
+# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
+# define _LIBCPP_HAS_NO_CHAR8_T
+# endif
-#if _LIBCPP_STD_VER > 11
-# define _LIBCPP_DEPRECATED [[deprecated]]
-#else
-# define _LIBCPP_DEPRECATED
-#endif
+// Deprecation macros.
+//
+// Deprecations warnings are always enabled, except when users explicitly opt-out
+// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.
+# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
+# if __has_attribute(deprecated)
+# define _LIBCPP_DEPRECATED __attribute__((deprecated))
+# define _LIBCPP_DEPRECATED_(m) __attribute__((deprecated(m)))
+# elif _LIBCPP_STD_VER > 11
+# define _LIBCPP_DEPRECATED [[deprecated]]
+# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]]
+# else
+# define _LIBCPP_DEPRECATED
+# define _LIBCPP_DEPRECATED_(m)
+# endif
+# else
+# define _LIBCPP_DEPRECATED
+# define _LIBCPP_DEPRECATED_(m)
+# endif
-#if _LIBCPP_STD_VER <= 11
-# define _LIBCPP_EXPLICIT_AFTER_CXX11
-# define _LIBCPP_DEPRECATED_AFTER_CXX11
-#else
-# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
-# define _LIBCPP_DEPRECATED_AFTER_CXX11 [[deprecated]]
-#endif
+# if !defined(_LIBCPP_CXX03_LANG)
+# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
+# else
+# define _LIBCPP_DEPRECATED_IN_CXX11
+# endif
-#if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
-#else
-# define _LIBCPP_CONSTEXPR_AFTER_CXX11
-#endif
+# if _LIBCPP_STD_VER > 11
+# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
+# else
+# define _LIBCPP_DEPRECATED_IN_CXX14
+# endif
-#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr
-#else
-# define _LIBCPP_CONSTEXPR_AFTER_CXX14
-#endif
+# if _LIBCPP_STD_VER > 14
+# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
+# else
+# define _LIBCPP_DEPRECATED_IN_CXX17
+# endif
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr
-#else
-# define _LIBCPP_CONSTEXPR_AFTER_CXX17
-#endif
+# if _LIBCPP_STD_VER > 17
+# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED
+# else
+# define _LIBCPP_DEPRECATED_IN_CXX20
+# endif
-#if __has_cpp_attribute(nodiscard) && _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17)
-# define _LIBCPP_NODISCARD_AFTER_CXX17 [[nodiscard]]
-#else
-# define _LIBCPP_NODISCARD_AFTER_CXX17
-#endif
+# if !defined(_LIBCPP_HAS_NO_CHAR8_T)
+# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED
+# else
+# define _LIBCPP_DEPRECATED_WITH_CHAR8_T
+# endif
-#if _LIBCPP_STD_VER > 14 && defined(__cpp_inline_variables) && (__cpp_inline_variables >= 201606L)
-# define _LIBCPP_INLINE_VAR inline
-#else
-# define _LIBCPP_INLINE_VAR
-#endif
+// Macros to enter and leave a state where deprecation warnings are suppressed.
+# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC)
+# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
+ _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \
+ _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop")
+# else
+# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+# define _LIBCPP_SUPPRESS_DEPRECATED_POP
+# endif
-#ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-# define _LIBCPP_EXPLICIT_MOVE(x) _VSTD::move(x)
-#else
-# define _LIBCPP_EXPLICIT_MOVE(x) (x)
-#endif
+# if _LIBCPP_STD_VER <= 11
+# define _LIBCPP_EXPLICIT_AFTER_CXX11
+# else
+# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
+# endif
-#ifndef _LIBCPP_CONSTEXPR_IF_NODEBUG
-#if defined(_LIBCPP_DEBUG) || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-#define _LIBCPP_CONSTEXPR_IF_NODEBUG
-#else
-#define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr
-#endif
-#endif
+# if _LIBCPP_STD_VER > 11
+# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr
+# else
+# define _LIBCPP_CONSTEXPR_SINCE_CXX14
+# endif
-#ifndef _LIBCPP_HAS_NO_ASAN
-_LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
- const void *, const void *, const void *, const void *);
-#endif
+# if _LIBCPP_STD_VER > 14
+# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr
+# else
+# define _LIBCPP_CONSTEXPR_SINCE_CXX17
+# endif
+
+# if _LIBCPP_STD_VER > 17
+# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr
+# else
+# define _LIBCPP_CONSTEXPR_SINCE_CXX20
+# endif
+
+# if _LIBCPP_STD_VER > 20
+# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr
+# else
+# define _LIBCPP_CONSTEXPR_SINCE_CXX23
+# endif
+
+# if __has_cpp_attribute(nodiscard)
+# define _LIBCPP_NODISCARD [[nodiscard]]
+# else
+// We can't use GCC's [[gnu::warn_unused_result]] and
+// __attribute__((warn_unused_result)), because GCC does not silence them via
+// (void) cast.
+# define _LIBCPP_NODISCARD
+# endif
+
+// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not
+// specified as such as an extension.
+# if !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
+# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD
+# else
+# define _LIBCPP_NODISCARD_EXT
+# endif
+
+# if _LIBCPP_STD_VER > 17 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
+# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD
+# else
+# define _LIBCPP_NODISCARD_AFTER_CXX17
+# endif
+
+# if __has_attribute(__no_destroy__)
+# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__))
+# else
+# define _LIBCPP_NO_DESTROY
+# endif
+
+# ifndef _LIBCPP_HAS_NO_ASAN
+ extern "C" _LIBCPP_FUNC_VIS void
+ __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*);
+# endif
// Try to find out if RTTI is disabled.
-// g++ and cl.exe have RTTI on by default and define a macro when it is.
-// g++ only defines the macro in 4.3.2 and onwards.
-#if !defined(_LIBCPP_NO_RTTI)
-# if defined(__GNUC__) && \
- ((__GNUC__ >= 5) || \
- (__GNUC__ == 4 && (__GNUC_MINOR__ >= 3 || __GNUC_PATCHLEVEL__ >= 2))) && \
- !defined(__GXX_RTTI)
-# define _LIBCPP_NO_RTTI
-# elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI)
+# if !defined(__cpp_rtti) || __cpp_rtti < 199711L
# define _LIBCPP_NO_RTTI
# endif
-#endif
-#ifndef _LIBCPP_WEAK
-#define _LIBCPP_WEAK __attribute__((__weak__))
-#endif
+# ifndef _LIBCPP_WEAK
+# define _LIBCPP_WEAK __attribute__((__weak__))
+# endif
// Thread API
-#if !defined(_LIBCPP_HAS_NO_THREADS) && \
- !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
- !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \
- !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
-# if defined(__FreeBSD__) || \
- defined(__Fuchsia__) || \
- defined(__NetBSD__) || \
- defined(__linux__) || \
- defined(__APPLE__) || \
- defined(__CloudABI__) || \
- defined(__sun__) || \
- (defined(__MINGW32__) && __has_include(<pthread.h>))
-# define _LIBCPP_HAS_THREAD_API_PTHREAD
-# elif defined(_LIBCPP_WIN32API)
-# define _LIBCPP_HAS_THREAD_API_WIN32
-# else
-# error "No thread API"
-# endif // _LIBCPP_HAS_THREAD_API
-#endif // _LIBCPP_HAS_NO_THREADS
+// clang-format off
+# if !defined(_LIBCPP_HAS_NO_THREADS) && \
+ !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
+ !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \
+ !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
-#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
-#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
+# if defined(__FreeBSD__) || \
+ defined(__wasi__) || \
+ defined(__NetBSD__) || \
+ defined(__OpenBSD__) || \
+ defined(__NuttX__) || \
+ defined(__linux__) || \
+ defined(__GNU__) || \
+ defined(__APPLE__) || \
+ defined(__sun__) || \
+ defined(__MVS__) || \
+ defined(_AIX) || \
+ defined(__EMSCRIPTEN__)
+// clang-format on
+# define _LIBCPP_HAS_THREAD_API_PTHREAD
+# elif defined(__Fuchsia__)
+// TODO(44575): Switch to C11 thread API when possible.
+# define _LIBCPP_HAS_THREAD_API_PTHREAD
+# elif defined(_LIBCPP_WIN32API)
+# define _LIBCPP_HAS_THREAD_API_WIN32
+# else
+# error "No thread API"
+# endif // _LIBCPP_HAS_THREAD_API
+# endif // _LIBCPP_HAS_NO_THREADS
+
+# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
+# if defined(__ANDROID__) && __ANDROID_API__ >= 30
+# define _LIBCPP_HAS_COND_CLOCKWAIT
+# elif defined(_LIBCPP_GLIBC_PREREQ)
+# if _LIBCPP_GLIBC_PREREQ(2, 30)
+# define _LIBCPP_HAS_COND_CLOCKWAIT
+# endif
+# endif
+# endif
+
+# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
+# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
_LIBCPP_HAS_NO_THREADS is not defined.
-#endif
+# endif
-#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
-#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
+# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
+# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
_LIBCPP_HAS_NO_THREADS is defined.
-#endif
+# endif
-#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
-#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
+# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
+# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
_LIBCPP_HAS_NO_THREADS is defined.
-#endif
+# endif
-// Systems that use capability-based security (FreeBSD with Capsicum,
-// Nuxi CloudABI) may only provide local filesystem access (using *at()).
-// Functions like open(), rename(), unlink() and stat() should not be
-// used, as they attempt to access the global filesystem namespace.
-#ifdef __CloudABI__
-#define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
-#endif
+# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
+# define __STDCPP_THREADS__ 1
+# endif
-// CloudABI is intended for running networked services. Processes do not
-// have standard input and output channels.
-#ifdef __CloudABI__
-#define _LIBCPP_HAS_NO_STDIN
-#define _LIBCPP_HAS_NO_STDOUT
-#endif
+// The glibc and Bionic implementation of pthreads implements
+// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
+// mutexes have no destroy mechanism.
+//
+// This optimization can't be performed on Apple platforms, where
+// pthread_mutex_destroy can allow the kernel to release resources.
+// See https://llvm.org/D64298 for details.
+//
+// TODO(EricWF): Enable this optimization on Bionic after speaking to their
+// respective stakeholders.
+// clang-format off
+# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \
+ (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \
+ defined(_LIBCPP_HAS_THREAD_API_WIN32)
+// clang-format on
+# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
+# endif
-#if defined(__BIONIC__) || defined(__CloudABI__) || \
- defined(__Fuchsia__) || defined(_LIBCPP_HAS_MUSL_LIBC)
-#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
-#endif
+// Destroying a condvar is a nop on Windows.
+//
+// This optimization can't be performed on Apple platforms, where
+// pthread_cond_destroy can allow the kernel to release resources.
+// See https://llvm.org/D64298 for details.
+//
+// TODO(EricWF): This is potentially true for some pthread implementations
+// as well.
+# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32)
+# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
+# endif
-// Thread-unsafe functions such as strtok() and localtime()
-// are not available.
-#ifdef __CloudABI__
-#define _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
-#endif
+// Some systems do not provide gets() in their C library, for security reasons.
+# if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__)
+# define _LIBCPP_C_HAS_NO_GETS
+# endif
-#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
-# define _LIBCPP_HAS_C_ATOMIC_IMP
-#elif _GNUC_VER > 407
-# define _LIBCPP_HAS_GCC_ATOMIC_IMP
-#endif
+# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \
+ defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__)
+# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
+# endif
-#if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP)) \
- || defined(_LIBCPP_HAS_NO_THREADS)
-#define _LIBCPP_HAS_NO_ATOMIC_HEADER
-#endif
+# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
+# define _LIBCPP_HAS_C_ATOMIC_IMP
+# elif defined(_LIBCPP_COMPILER_GCC)
+# define _LIBCPP_HAS_GCC_ATOMIC_IMP
+# endif
-#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
-#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
-#endif
+# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \
+ !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)
+# define _LIBCPP_HAS_NO_ATOMIC_HEADER
+# else
+# ifndef _LIBCPP_ATOMIC_FLAG_TYPE
+# define _LIBCPP_ATOMIC_FLAG_TYPE bool
+# endif
+# ifdef _LIBCPP_FREESTANDING
+# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS
+# endif
+# endif
-#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS)
-# if defined(__clang__) && __has_attribute(acquire_capability)
+# ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
+# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
+# endif
+
+# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS)
+# if defined(__clang__) && __has_attribute(acquire_capability)
// Work around the attribute handling in clang. When both __declspec and
// __attribute__ are present, the processing goes awry preventing the definition
-// of the types.
-# if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
-# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
+// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus
+// combining the two does work.
+# if !defined(_MSC_VER)
+# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
+# endif
# endif
# endif
-#endif
-#if __has_attribute(require_constant_initialization)
-# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__))
-#else
-# define _LIBCPP_SAFE_STATIC
-#endif
-
-#if !__has_builtin(__builtin_addressof) && _GNUC_VER < 700
-#define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF
-#endif
-
-#if !defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
-# if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION)
-# define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS
-# endif
-#endif
-
-#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS)
-# define _LIBCPP_DIAGNOSE_WARNING(...) \
- __attribute__((diagnose_if(__VA_ARGS__, "warning")))
-# define _LIBCPP_DIAGNOSE_ERROR(...) \
- __attribute__((diagnose_if(__VA_ARGS__, "error")))
-#else
-# define _LIBCPP_DIAGNOSE_WARNING(...)
-# define _LIBCPP_DIAGNOSE_ERROR(...)
-#endif
-
-#if __has_attribute(fallthough) || _GNUC_VER >= 700
-// Use a function like macro to imply that it must be followed by a semicolon
-# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
-#else
-# define _LIBCPP_FALLTHROUGH() ((void)0)
-#endif
-
-#if defined(_LIBCPP_ABI_MICROSOFT) && \
- (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases))
-# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
-#else
-# define _LIBCPP_DECLSPEC_EMPTY_BASES
-#endif
-
-#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
-#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
-#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
-#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
-#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
-#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
-
-#if !defined(__cpp_deduction_guides) || __cpp_deduction_guides < 201611
-#define _LIBCPP_HAS_NO_DEDUCTION_GUIDES
-#endif
-
-#if !__has_keyword(__is_aggregate) && (_GNUC_VER_NEW < 7001)
-#define _LIBCPP_HAS_NO_IS_AGGREGATE
-#endif
-
-#if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L
-#define _LIBCPP_HAS_NO_COROUTINES
-#endif
-
-// FIXME: Correct this macro when either (A) a feature test macro for the
-// spaceship operator is provided, or (B) a compiler provides a complete
-// implementation.
-#define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR
-
-// Decide whether to use availability macros.
-#if !defined(_LIBCPP_BUILDING_LIBRARY) && \
- !defined(_LIBCPP_DISABLE_AVAILABILITY) && \
- __has_feature(attribute_availability_with_strict) && \
- __has_feature(attribute_availability_in_templates)
-# ifdef __APPLE__
-# define _LIBCPP_USE_AVAILABILITY_APPLE
-# endif
-#endif
-
-// Define availability macros.
-#if defined(_LIBCPP_USE_AVAILABILITY_APPLE)
-# define _LIBCPP_AVAILABILITY_SHARED_MUTEX \
- __attribute__((availability(macosx,strict,introduced=10.12))) \
- __attribute__((availability(ios,strict,introduced=10.0))) \
- __attribute__((availability(tvos,strict,introduced=10.0))) \
- __attribute__((availability(watchos,strict,introduced=3.0)))
-# define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS __attribute__((unavailable))
-# define _LIBCPP_AVAILABILITY_BAD_ARRAY_LENGTH __attribute__((unavailable))
-# define _LIBCPP_AVAILABILITY_BAD_ANY_CAST __attribute__((unavailable))
-# define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS \
- __attribute__((availability(macosx,strict,introduced=10.12))) \
- __attribute__((availability(ios,strict,introduced=10.0))) \
- __attribute__((availability(tvos,strict,introduced=10.0))) \
- __attribute__((availability(watchos,strict,introduced=3.0)))
-# define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE \
- __attribute__((availability(macosx,strict,introduced=10.12))) \
- __attribute__((availability(ios,strict,introduced=10.0))) \
- __attribute__((availability(tvos,strict,introduced=10.0))) \
- __attribute__((availability(watchos,strict,introduced=3.0)))
-# define _LIBCPP_AVAILABILITY_FUTURE_ERROR \
- __attribute__((availability(ios,strict,introduced=6.0)))
-# define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE \
- __attribute__((availability(macosx,strict,introduced=10.9))) \
- __attribute__((availability(ios,strict,introduced=7.0)))
-# define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY \
- __attribute__((availability(macosx,strict,introduced=10.9))) \
- __attribute__((availability(ios,strict,introduced=7.0)))
-# define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR \
- __attribute__((availability(macosx,strict,introduced=10.9))) \
- __attribute__((availability(ios,strict,introduced=7.0)))
-#else
-# define _LIBCPP_AVAILABILITY_SHARED_MUTEX
-# define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
-# define _LIBCPP_AVAILABILITY_BAD_ARRAY_LENGTH
-# define _LIBCPP_AVAILABILITY_BAD_ANY_CAST
-# define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS
-# define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE
-# define _LIBCPP_AVAILABILITY_FUTURE_ERROR
-# define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE
-# define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY
-# define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
-#endif
-
-// Define availability that depends on _LIBCPP_NO_EXCEPTIONS.
-#ifdef _LIBCPP_NO_EXCEPTIONS
-# define _LIBCPP_AVAILABILITY_DYNARRAY
-# define _LIBCPP_AVAILABILITY_FUTURE
-# define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
-#else
-# define _LIBCPP_AVAILABILITY_DYNARRAY _LIBCPP_AVAILABILITY_BAD_ARRAY_LENGTH
-# define _LIBCPP_AVAILABILITY_FUTURE _LIBCPP_AVAILABILITY_FUTURE_ERROR
-# define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST \
- _LIBCPP_AVAILABILITY_BAD_ANY_CAST
-#endif
-
-// Availability of stream API in the dylib got dropped and re-added. The
-// extern template should effectively be available at:
-// availability(macosx,introduced=10.9)
-// availability(ios,introduced=7.0)
-#if defined(_LIBCPP_USE_AVAILABILITY_APPLE) && \
- ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1090) || \
- (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 70000))
-#define _LIBCPP_AVAILABILITY_NO_STREAMS_EXTERN_TEMPLATE
-#endif
-
-#if defined(_LIBCPP_COMPILER_IBM)
-#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO
-#endif
-
-#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
-# define _LIBCPP_PUSH_MACROS
-# define _LIBCPP_POP_MACROS
-#else
- // Don't warn about macro conflicts when we can restore them at the
- // end of the header.
-# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
-# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
-# endif
-# if defined(_LIBCPP_COMPILER_MSVC)
-# define _LIBCPP_PUSH_MACROS \
- __pragma(push_macro("min")) \
- __pragma(push_macro("max"))
-# define _LIBCPP_POP_MACROS \
- __pragma(pop_macro("min")) \
- __pragma(pop_macro("max"))
+# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
+# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x))
# else
-# define _LIBCPP_PUSH_MACROS \
- _Pragma("push_macro(\"min\")") \
- _Pragma("push_macro(\"max\")")
-# define _LIBCPP_POP_MACROS \
- _Pragma("pop_macro(\"min\")") \
- _Pragma("pop_macro(\"max\")")
+# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
# endif
-#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
-#ifndef _LIBCPP_NO_AUTO_LINK
-# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
-# if defined(_DLL)
-# pragma comment(lib, "c++.lib")
-# else
-# pragma comment(lib, "libc++.lib")
+# if _LIBCPP_STD_VER > 17
+# define _LIBCPP_CONSTINIT constinit
+# elif __has_attribute(__require_constant_initialization__)
+# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__))
+# else
+# define _LIBCPP_CONSTINIT
+# endif
+
+# if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS)
+# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning")))
+# else
+# define _LIBCPP_DIAGNOSE_WARNING(...)
+# endif
+
+// Use a function like macro to imply that it must be followed by a semicolon
+# if __has_cpp_attribute(fallthrough)
+# define _LIBCPP_FALLTHROUGH() [[fallthrough]]
+# elif __has_attribute(__fallthrough__)
+# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
+# else
+# define _LIBCPP_FALLTHROUGH() ((void)0)
+# endif
+
+# if __has_cpp_attribute(_Clang::__lifetimebound__)
+# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]]
+# else
+# define _LIBCPP_LIFETIMEBOUND
+# endif
+
+# if __has_attribute(__nodebug__)
+# define _LIBCPP_NODEBUG __attribute__((__nodebug__))
+# else
+# define _LIBCPP_NODEBUG
+# endif
+
+# if __has_attribute(__standalone_debug__)
+# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__))
+# else
+# define _LIBCPP_STANDALONE_DEBUG
+# endif
+
+# if __has_attribute(__preferred_name__)
+# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x)))
+# else
+# define _LIBCPP_PREFERRED_NAME(x)
+# endif
+
+// We often repeat things just for handling wide characters in the library.
+// When wide characters are disabled, it can be useful to have a quick way of
+// disabling it without having to resort to #if-#endif, which has a larger
+// impact on readability.
+# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
+# define _LIBCPP_IF_WIDE_CHARACTERS(...)
+# else
+# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__
+# endif
+
+# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases)
+# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
+# else
+# define _LIBCPP_DECLSPEC_EMPTY_BASES
+# endif
+
+# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
+# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
+# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
+# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
+# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
+# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION
+# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
+
+# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES)
+# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS
+# define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION
+# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS
+# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
+# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR
+# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS
+# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES
+
+# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")")
+# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")")
+
+# ifndef _LIBCPP_NO_AUTO_LINK
+# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
+# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+# pragma comment(lib, "c++.lib")
+# else
+# pragma comment(lib, "libc++.lib")
+# endif
+# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
+# endif // _LIBCPP_NO_AUTO_LINK
+
+// Configures the fopen close-on-exec mode character, if any. This string will
+// be appended to any mode string used by fstream for fopen/fdopen.
+//
+// Not all platforms support this, but it helps avoid fd-leaks on platforms that
+// do.
+# if defined(__BIONIC__)
+# define _LIBCPP_FOPEN_CLOEXEC_MODE "e"
+# else
+# define _LIBCPP_FOPEN_CLOEXEC_MODE
+# endif
+
+// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set
+// of functions used in cstdio may not be available for low API levels when
+// using 64-bit file offsets on LP32.
+# if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24
+# define _LIBCPP_HAS_NO_FGETPOS_FSETPOS
+# endif
+
+# if __has_attribute(__init_priority__)
+# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100)))
+# else
+# define _LIBCPP_INIT_PRIORITY_MAX
+# endif
+
+# if __has_attribute(__format__)
+// The attribute uses 1-based indices for ordinary and static member functions.
+// The attribute uses 2-based indices for non-static member functions.
+# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \
+ __attribute__((__format__(archetype, format_string_index, first_format_arg_index)))
+# else
+# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */
+# endif
+
+# if __has_cpp_attribute(msvc::no_unique_address)
+// MSVC implements [[no_unique_address]] as a silent no-op currently.
+// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.)
+// However, MSVC implements [[msvc::no_unique_address]] which does what
+// [[no_unique_address]] is supposed to do, in general.
+
+// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or
+// [[msvc::no_unique_address]] though. If/when it does implement
+// [[msvc::no_unique_address]], this should be preferred though.
+# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
+# elif __has_cpp_attribute(no_unique_address)
+# define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]]
+# else
+# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */
+// Note that this can be replaced by #error as soon as clang-cl
+// implements msvc::no_unique_address, since there should be no C++20
+// compiler that doesn't support one of the two attributes at that point.
+// We generally don't want to use this macro outside of C++20-only code,
+// because using it conditionally in one language version only would make
+// the ABI inconsistent.
+# endif
+
+# ifdef _LIBCPP_COMPILER_CLANG_BASED
+# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push")
+# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop")
+# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str))
+# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)
+# elif defined(_LIBCPP_COMPILER_GCC)
+# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push")
+# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop")
+# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)
+# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str))
+# else
+# define _LIBCPP_DIAGNOSTIC_PUSH
+# define _LIBCPP_DIAGNOSTIC_POP
+# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)
+# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)
+# endif
+
+# if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC)
+# define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)")
+# define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)")
+# else
+# define _LIBCPP_PACKED_BYTE_FOR_AIX /* empty */
+# define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */
+# endif
+
+# if __has_attribute(__packed__)
+# define _LIBCPP_PACKED __attribute__((__packed__))
+# else
+# define _LIBCPP_PACKED
+# endif
+
+// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these
+// functions is gradually being added to existing C libraries. The conditions
+// below check for known C library versions and conditions under which these
+// functions are declared by the C library.
+# define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8
+// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if
+// __cpp_char8_t is defined or if C2X extensions are enabled. Unfortunately,
+// determining the latter depends on internal GNU libc details. If the
+// __cpp_char8_t feature test macro is not defined, then a char8_t typedef
+// will be declared as well.
+# if defined(_LIBCPP_GLIBC_PREREQ) && defined(__GLIBC_USE)
+# if _LIBCPP_GLIBC_PREREQ(2, 36) && (defined(__cpp_char8_t) || __GLIBC_USE(ISOC2X))
+# undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8
# endif
-# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
-#endif // _LIBCPP_NO_AUTO_LINK
+# endif
+
+// There are a handful of public standard library types that are intended to
+// support CTAD but don't need any explicit deduction guides to do so. This
+// macro is used to mark them as such, which suppresses the
+// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code
+// with these classes.
+#if _LIBCPP_STD_VER >= 17
+# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \
+ template <class ..._Tag> \
+ _ClassName(typename _Tag::__allow_ctad...) -> _ClassName<_Tag...>
+#else
+# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "")
+#endif
#endif // __cplusplus
-#endif // _LIBCPP_CONFIG
+#endif // _LIBCPP___CONFIG
