// -*- 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 #if defined(__apple_build_version__) // Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403) # 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 // _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 160006 # define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y # define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) // 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 # 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 // ... add new file formats here ... # endif # 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 // 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 // Give reverse_iterator 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 // 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 // Fix the implementation of CityHash used for std::hash. // This is an ABI break because `std::hash` will return a different result, // which means that hashing the same object in translation units built against // different versions of libc++ can return inconsistent results. This is especially // tricky since std::hash is used in the implementation of unordered containers. // // The incorrect implementation of CityHash has the problem that it drops some // bits on the floor. # define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION // 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. 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 # endif # 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 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_TOSTRING2(x) #x # define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) # 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 # 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(_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) # 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 # 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 # 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(__MVS__) # include // 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 # include # 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 # 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 # endif // defined(_WIN32) # ifdef __sun__ # include # 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 // 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_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 # 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 # ifndef _LIBCPP_CXX03_LANG # 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 # 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 !defined(__cpp_exceptions) || __cpp_exceptions < 199711L # define _LIBCPP_NO_EXCEPTIONS # endif # define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) # if defined(_LIBCPP_COMPILER_CLANG_BASED) # 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_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(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) # if !defined(__SANITIZE_ADDRESS__) # define _LIBCPP_HAS_NO_ASAN # endif # define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) # define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ # endif // _LIBCPP_COMPILER_[CLANG|GCC] # 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) || (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 // This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern // "C" function, as those lack mangling. # define _LIBCPP_HIDE_FROM_ABI_C _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_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. // clang-format off # define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { # define _LIBCPP_END_NAMESPACE_STD }} # define _VSTD std _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_BEGIN_NAMESPACE_FILESYSTEM \ _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { # endif # define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }} // clang-format on # define _VSTD_FS std::__fs::filesystem # if __has_attribute(__enable_if__) # define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) # endif # ifndef __SIZEOF_INT128__ # define _LIBCPP_HAS_NO_INT128 # endif # ifndef __cpp_consteval # define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR # else # define _LIBCPP_CONSTEVAL consteval # endif # if __has_attribute(__malloc__) # 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_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 # 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 # 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 // 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 # 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)) # 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 !defined(_LIBCPP_CXX03_LANG) # define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED # else # define _LIBCPP_DEPRECATED_IN_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 # 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 _LIBCPP_STD_VER >= 23 # define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED #else # define _LIBCPP_DEPRECATED_IN_CXX23 #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_SINCE_CXX14 constexpr # else # define _LIBCPP_CONSTEXPR_SINCE_CXX14 # 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. # if !defined(__cpp_rtti) || __cpp_rtti < 199711L # define _LIBCPP_HAS_NO_RTTI # endif # ifndef _LIBCPP_WEAK # define _LIBCPP_WEAK __attribute__((__weak__)) # endif // Thread API // 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(__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 # 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. // 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 // 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(__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. 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 # ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) # else # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) # endif # 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. Determining // the latter depends on internal GNU libc details that are not appropriate // to depend on here, so any declarations present when __cpp_char8_t is not // defined are ignored. # if defined(_LIBCPP_GLIBC_PREREQ) # if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) # undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 # endif # 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 \ _ClassName(typename _Tag::__allow_ctad...) -> _ClassName<_Tag...> #else # define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "") #endif // TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use // compiler intrinsics in the Objective-C++ mode. # ifdef __OBJC__ # define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS # endif #endif // __cplusplus #endif // _LIBCPP___CONFIG