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llvm-capstone/libcxx/include/__config
Louis Dionne a34f246899 [libc++][ABI BREAK] Do not use the C++03 emulation for std::nullptr_t by default 
We only support Clangs that implement nullptr as an extension in C++03 mode,
and we don't support GCC in C++03 mode. Hence, this patch disables the
use of the std::nullptr_t emulation in C++03 mode by default. Doing that
is technically an ABI break since it changes the mangling for std::nullptr_t.
However:

(1) The only affected users are those compiling in C++03 mode that have
    std::nullptr_t as part of their ABI, which should be reasonably rare.

(2) Those users already have a lingering problem in that their code will
    be incompatible in C++03 and C++11 modes because of that very ABI break.
    Hence, the only users that could really be inconvenienced about this
    change is those that planned on compiling in C++03 mode forever - for
    other users, we're just breaking them now instead of letting them break
    themselves later on when they try to upgrade to C++11.

(3) The ABI break will cause a linker error since the mangling changed,
    and will not result in an obscure runtime error.

Furthermore, if anyone is broken by this, they can define the
_LIBCPP_ABI_USE_CXX03_NULLPTR_EMULATION macro to return to the
previous behavior. We will then remove that macro after shipping
this for one release if we haven't seen widespread issues.

Concretely, the motivation for making this change is to make our own ABI
consistent in C++03 and C++11 modes and to remove complexity around the
definition of nullptr.

Furthermore, we could investigate making nullptr a keyword in C++03 mode
as a Clang extension -- I don't think that would break anyone, since
libc++ already defines nullptr as a macro to something else. Only users
that do not use libc++ and compile in C++03 mode could potentially be
broken by that.

Differential Revision: https://reviews.llvm.org/D109459
2021-11-30 06:01:45 -05:00

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// -*- 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_CONFIG
#define _LIBCPP_CONFIG
#include <__config_site>
#if defined(_MSC_VER) && !defined(__clang__)
# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
# endif
#endif
#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
#pragma GCC system_header
#endif
#ifdef __cplusplus
#define _LIBCPP_VERSION 14000
#ifndef _LIBCPP_ABI_VERSION
# define _LIBCPP_ABI_VERSION 1
#endif
#if __STDC_HOSTED__ == 0
# define _LIBCPP_FREESTANDING
#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
# elif __cplusplus <= 202002L
# define _LIBCPP_STD_VER 20
# else
# define _LIBCPP_STD_VER 21 // current year, or date of c++2b ratification
# 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
// ... add new file formats here ...
#endif
#if defined(_LIBCPP_ABI_UNSTABLE) || _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
// Fix deque iterator type in order to support incomplete types.
# 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
// Fix undefined behavior in how __tree stores its end and parent nodes.
# 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
// 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
// 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
// In C++20 and later, don't derive std::plus from std::binary_function,
// nor std::negate from std::unary_function.
# define _LIBCPP_ABI_NO_BINDER_BASES
// 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" 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
// Use raw pointers, not wrapped ones, for std::span's iterator type.
# define _LIBCPP_ABI_SPAN_POINTER_ITERATORS
// 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
#elif _LIBCPP_ABI_VERSION == 1
# if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
// 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
// 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
# endif
#endif
// By default, don't use a nullptr_t emulation type in C++03.
//
// This is technically an ABI break from previous releases, however it is
// very unlikely to impact anyone. If a user is impacted by this break,
// they can return to using the C++03 nullptr emulation by defining
// _LIBCPP_ABI_USE_CXX03_NULLPTR_EMULATION.
//
// This switch will be removed entirely in favour of never providing a
// C++03 emulation after one release.
//
// IMPORTANT: IF YOU ARE READING THIS AND YOU TURN THIS MACRO ON, PLEASE LEAVE
// A COMMENT ON https://reviews.llvm.org/D109459 OR YOU WILL BE BROKEN
// IN THE FUTURE WHEN WE REMOVE THE ABILITY TO USE THE C++03 EMULATION.
#ifndef _LIBCPP_ABI_USE_CXX03_NULLPTR_EMULATION
# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR
#endif
#if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ABI_UNSTABLE) || _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 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_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)
#ifndef _LIBCPP_ABI_NAMESPACE
# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)
#endif
#if __cplusplus < 201103L
#define _LIBCPP_CXX03_LANG
#endif
#ifndef __has_attribute
#define __has_attribute(__x) 0
#endif
#ifndef __has_builtin
#define __has_builtin(__x) 0
#endif
#ifndef __has_extension
#define __has_extension(__x) 0
#endif
#ifndef __has_feature
#define __has_feature(__x) 0
#endif
#ifndef __has_cpp_attribute
#define __has_cpp_attribute(__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(__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
#elif defined(_MSC_VER)
# define _LIBCPP_COMPILER_MSVC
#elif defined(__IBMCPP__)
# define _LIBCPP_COMPILER_IBM
#endif
#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L
#error "libc++ does not support using GCC with C++03. 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)
# define _LIBCPP_ABI_MICROSOFT
# else
# define _LIBCPP_ABI_ITANIUM
# endif
#endif
#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
# define _LIBCPP_ABI_VCRUNTIME
#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__)
#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
# 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
# endif
# 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(_AIX) && !defined(__64BIT__)
// The size of wchar is 2 byte on 32-bit mode on AIX.
# define _LIBCPP_SHORT_WCHAR 1
#endif
#if defined(__OpenBSD__)
// 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__) || defined(__wasi__)
# 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 the compiler supports using_if_exists, pretend we have those functions and they'll
// be picked up if the C library provides them.
//
// TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists
// for platforms that don't have a conforming C11 library, so we can drop this whole thing.
#if __has_attribute(using_if_exists)
# define _LIBCPP_HAS_TIMESPEC_GET
# define _LIBCPP_HAS_QUICK_EXIT
# define _LIBCPP_HAS_ALIGNED_ALLOC
#else
#if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L
# if defined(__FreeBSD__)
# define _LIBCPP_HAS_ALIGNED_ALLOC
# define _LIBCPP_HAS_QUICK_EXIT
# if __FreeBSD_version >= 1300064 || \
(__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000)
# define _LIBCPP_HAS_TIMESPEC_GET
# endif
# elif defined(__BIONIC__)
# if __ANDROID_API__ >= 21
# define _LIBCPP_HAS_QUICK_EXIT
# endif
# if __ANDROID_API__ >= 28
# define _LIBCPP_HAS_ALIGNED_ALLOC
# endif
# if __ANDROID_API__ >= 29
# define _LIBCPP_HAS_TIMESPEC_GET
# endif
# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__)
# define _LIBCPP_HAS_ALIGNED_ALLOC
# define _LIBCPP_HAS_QUICK_EXIT
# define _LIBCPP_HAS_TIMESPEC_GET
# elif defined(__OpenBSD__)
# define _LIBCPP_HAS_ALIGNED_ALLOC
# define _LIBCPP_HAS_TIMESPEC_GET
# 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_ALIGNED_ALLOC
# define _LIBCPP_HAS_TIMESPEC_GET
# endif
# else // defined(_LIBCPP_HAS_MUSL_LIBC)
# define _LIBCPP_HAS_ALIGNED_ALLOC
# define _LIBCPP_HAS_QUICK_EXIT
# define _LIBCPP_HAS_TIMESPEC_GET
# endif
# elif defined(_LIBCPP_MSVCRT)
// Using Microsoft's C Runtime library, not MinGW
# define _LIBCPP_HAS_TIMESPEC_GET
# elif defined(__APPLE__)
// timespec_get and aligned_alloc were introduced in macOS 10.15 and
// aligned releases
# if ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500) || \
(defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000) || \
(defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000) || \
(defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000))
# define _LIBCPP_HAS_ALIGNED_ALLOC
# define _LIBCPP_HAS_TIMESPEC_GET
# endif
# endif // __APPLE__
#endif
#endif // __has_attribute(using_if_exists)
#ifndef _LIBCPP_CXX03_LANG
# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
#elif defined(_LIBCPP_COMPILER_CLANG_BASED)
# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
#else
# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang"
#endif
#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
#if defined(_LIBCPP_COMPILER_CLANG_BASED)
#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT)
# error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead
#endif
#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \
(!defined(__arm__) || __ARM_ARCH_7K__ >= 2)
# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
#endif
#if __has_feature(cxx_alignas)
# define _ALIGNAS_TYPE(x) alignas(x)
# define _ALIGNAS(x) alignas(x)
#else
# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
# define _ALIGNAS(x) __attribute__((__aligned__(x)))
#endif
#if __cplusplus < 201103L
typedef __char16_t char16_t;
typedef __char32_t char32_t;
#endif
#if !__has_feature(cxx_exceptions)
# define _LIBCPP_NO_EXCEPTIONS
#endif
#if !(__has_feature(cxx_strong_enums))
#define _LIBCPP_HAS_NO_STRONG_ENUMS
#endif
#if __has_feature(cxx_attributes)
# define _LIBCPP_NORETURN [[noreturn]]
#else
# define _LIBCPP_NORETURN __attribute__ ((noreturn))
#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
// Objective-C++ features (opt-in)
#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_extension(blocks)
# define _LIBCPP_HAS_EXTENSION_BLOCKS
#endif
#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__)
# define _LIBCPP_HAS_BLOCKS_RUNTIME
#endif
#if !(__has_feature(cxx_noexcept))
#define _LIBCPP_HAS_NO_NOEXCEPT
#endif
#if !__has_feature(address_sanitizer)
#define _LIBCPP_HAS_NO_ASAN
#endif
// Allow for build-time disabling of unsigned integer sanitization
#if __has_attribute(no_sanitize)
#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
#endif
#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
#elif defined(_LIBCPP_COMPILER_GCC)
#define _ALIGNAS(x) __attribute__((__aligned__(x)))
#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
#define _LIBCPP_NORETURN __attribute__((noreturn))
#if !defined(__EXCEPTIONS)
# define _LIBCPP_NO_EXCEPTIONS
#endif
#if !defined(__SANITIZE_ADDRESS__)
#define _LIBCPP_HAS_NO_ASAN
#endif
#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
#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 __alignof__ __alignof
#define _LIBCPP_NORETURN __declspec(noreturn)
#define _ALIGNAS(x) __declspec(align(x))
#define _ALIGNAS_TYPE(x) alignas(x)
#define _LIBCPP_WEAK
#define _LIBCPP_HAS_NO_ASAN
#define _LIBCPP_ALWAYS_INLINE __forceinline
#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
#define _LIBCPP_DISABLE_EXTENSION_WARNING
#elif defined(_LIBCPP_COMPILER_IBM)
#define _ALIGNAS(x) __attribute__((__aligned__(x)))
#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
#define _ATTRIBUTE(x) __attribute__((x))
#define _LIBCPP_NORETURN __attribute__((noreturn))
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#if defined(_AIX)
#define __MULTILOCALE_API
#endif
#define _LIBCPP_HAS_NO_ASAN
#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
#define _LIBCPP_DISABLE_EXTENSION_WARNING
#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM]
#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
# 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
#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")))
# else
# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default")))
# endif
# else
# define _LIBCPP_TEMPLATE_VIS
# endif
#endif
#ifndef _LIBCPP_TEMPLATE_DATA_VIS
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default")))
# else
# define _LIBCPP_TEMPLATE_DATA_VIS
# endif
#endif
#ifndef _LIBCPP_EXPORTED_FROM_ABI
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default")))
# else
# define _LIBCPP_EXPORTED_FROM_ABI
# endif
#endif
#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS
#endif
#ifndef _LIBCPP_EXCEPTION_ABI
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
# else
# define _LIBCPP_EXCEPTION_ABI
# 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
#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default")))
# else
# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
# endif
#endif
#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
#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
#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_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
# endif
#endif
#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_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
#endif
// Just so we can migrate to the new macros gradually.
#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
#define _LIBCPP_END_NAMESPACE_STD } }
#define _VSTD std::_LIBCPP_ABI_NAMESPACE
_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
#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 __has_attribute(__enable_if__)
# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, "")))
#endif
#ifndef _LIBCPP_HAS_NO_NOEXCEPT
# define _NOEXCEPT noexcept
# define _NOEXCEPT_(x) noexcept(x)
#else
# define _NOEXCEPT throw()
# define _NOEXCEPT_(x)
#endif
#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
typedef unsigned short char16_t;
typedef unsigned int char32_t;
#endif
#ifndef __SIZEOF_INT128__
#define _LIBCPP_HAS_NO_INT128
#endif
#ifdef _LIBCPP_CXX03_LANG
# define static_assert(...) _Static_assert(__VA_ARGS__)
# define decltype(...) __decltype(__VA_ARGS__)
#endif // _LIBCPP_CXX03_LANG
#ifdef _LIBCPP_CXX03_LANG
# define _LIBCPP_CONSTEXPR
#else
# define _LIBCPP_CONSTEXPR constexpr
#endif
#ifndef __cpp_consteval
# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR
#else
# define _LIBCPP_CONSTEVAL consteval
#endif
#if !defined(__cpp_concepts) || __cpp_concepts < 201907L
#define _LIBCPP_HAS_NO_CONCEPTS
#endif
#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_HAS_NO_CONCEPTS)
#define _LIBCPP_HAS_NO_RANGES
#endif
#ifdef _LIBCPP_CXX03_LANG
# define _LIBCPP_DEFAULT {}
#else
# define _LIBCPP_DEFAULT = default;
#endif
#ifdef __GNUC__
# define _LIBCPP_NOALIAS __attribute__((__malloc__))
#else
# define _LIBCPP_NOALIAS
#endif
#if __has_attribute(using_if_exists)
# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists))
#else
# define _LIBCPP_USING_IF_EXISTS
#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
// _LIBCPP_DEBUG potential values:
// - undefined: No assertions. This is the default.
// - 0: Basic assertions
// - 1: Basic assertions + iterator validity checks + unspecified behavior randomization.
# if !defined(_LIBCPP_DEBUG)
# define _LIBCPP_DEBUG_LEVEL 0
# elif _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
# endif
# if _LIBCPP_DEBUG_LEVEL >= 2 && !defined(_LIBCPP_CXX03_LANG)
# define _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY
# endif
# if defined(_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY)
# if defined(_LIBCPP_CXX03_LANG)
# error Support for unspecified stability is only for C++11 and higher
# endif
# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \
do { \
if (!__builtin_is_constant_evaluated()) \
_VSTD::shuffle(__first, __last, __libcpp_debug_randomizer()); \
} while (false)
# else
# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \
do { \
} while (false)
# endif
// Libc++ allows disabling extern template instantiation declarations by
// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE.
//
// Furthermore, when the Debug mode is enabled, we disable extern declarations
// when building user code because we don't want to use the functions compiled
// in the library, which might not have had the debug mode enabled when built.
// However, some extern declarations need to be used, because code correctness
// depends on it (several instances in <locale>). Those special declarations
// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled
// even when the debug mode is enabled.
#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE)
# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */
# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */
#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY)
# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */
# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__;
#else
# define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__;
#endif
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \
defined(__sun__) || defined(__NetBSD__)
#define _LIBCPP_LOCALE__L_EXTENSIONS 1
#endif
#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_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(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \
(!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__) || defined(__sun__)
#define _LIBCPP_WCTYPE_IS_MASK
#endif
#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
#define _LIBCPP_HAS_NO_CHAR8_T
#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))
# elif _LIBCPP_STD_VER > 11
# define _LIBCPP_DEPRECATED [[deprecated]]
# else
# define _LIBCPP_DEPRECATED
# endif
#else
# define _LIBCPP_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 >= 14
# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
#else
# define _LIBCPP_DEPRECATED_IN_CXX14
#endif
#if _LIBCPP_STD_VER >= 17
# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
#else
# define _LIBCPP_DEPRECATED_IN_CXX17
#endif
#if _LIBCPP_STD_VER > 17
# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED
#else
# define _LIBCPP_DEPRECATED_IN_CXX20
#endif
#if !defined(_LIBCPP_HAS_NO_CHAR8_T)
# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED
#else
# define _LIBCPP_DEPRECATED_WITH_CHAR8_T
#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
#if _LIBCPP_STD_VER <= 11
# define _LIBCPP_EXPLICIT_AFTER_CXX11
#else
# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
#endif
#if _LIBCPP_STD_VER > 11
# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
#else
# define _LIBCPP_CONSTEXPR_AFTER_CXX11
#endif
#if _LIBCPP_STD_VER > 14
# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr
#else
# define _LIBCPP_CONSTEXPR_AFTER_CXX14
#endif
#if _LIBCPP_STD_VER > 17
# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr
#else
# define _LIBCPP_CONSTEXPR_AFTER_CXX17
#endif
#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC)
# define _LIBCPP_NODISCARD [[nodiscard]]
#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG)
# define _LIBCPP_NODISCARD [[clang::warn_unused_result]]
#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_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD
#else
# define _LIBCPP_NODISCARD_EXT
#endif
#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \
(_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD))
# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD
#else
# define _LIBCPP_NODISCARD_AFTER_CXX17
#endif
#if !defined(_LIBCPP_DEBUG) && _LIBCPP_STD_VER > 11
# define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr
#else
# define _LIBCPP_CONSTEXPR_IF_NODEBUG
#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.
#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti)
# define _LIBCPP_NO_RTTI
#elif defined(__GNUC__) && !defined(__GXX_RTTI)
# define _LIBCPP_NO_RTTI
#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI)
# define _LIBCPP_NO_RTTI
#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(__wasi__) || \
defined(__NetBSD__) || \
defined(__OpenBSD__) || \
defined(__NuttX__) || \
defined(__linux__) || \
defined(__GNU__) || \
defined(__APPLE__) || \
defined(__sun__) || \
defined(__MVS__) || \
defined(_AIX)
# 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
#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
#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
#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
#define __STDCPP_THREADS__ 1
#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.
#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \
|| (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \
|| defined(_LIBCPP_HAS_THREAD_API_WIN32)
# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
#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
// 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 defined(__BIONIC__) || defined(__NuttX__) || \
defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) || \
defined(__MVS__) || defined(__OpenBSD__)
#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
#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
#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
#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
# endif
# endif
#endif
#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x))
#else
# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
#endif
#if __has_attribute(require_constant_initialization)
# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__))
#else
# define _LIBCPP_SAFE_STATIC
#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
// Use a function like macro to imply that it must be followed by a semicolon
#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
# define _LIBCPP_FALLTHROUGH() [[fallthrough]]
#elif __has_cpp_attribute(clang::fallthrough)
# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]]
#elif __has_attribute(__fallthrough__)
# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
#else
# define _LIBCPP_FALLTHROUGH() ((void)0)
#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) && \
(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_BINDERS
#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
#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_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
#if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L
#define _LIBCPP_HAS_NO_CXX20_COROUTINES
#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"))
# 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\")")
# 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(_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)
// TODO: Remove this once we drop support for building libc++ with old Clangs
# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \
(defined(__apple_build_version__) && __apple_build_version__ < 13000000)
# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101)))
# else
# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100)))
# endif
#else
# define _LIBCPP_INIT_PRIORITY_MAX
#endif
#if defined(__GNUC__) || defined(__clang__)
// 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
#endif // __cplusplus
#endif // _LIBCPP_CONFIG
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