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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CONFIG11#define _LIBCPP___CONFIG12 13#include <__config_site>14#include <__configuration/abi.h>15#include <__configuration/availability.h>16#include <__configuration/compiler.h>17#include <__configuration/experimental.h>18#include <__configuration/hardening.h>19#include <__configuration/language.h>20#include <__configuration/platform.h>21 22#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER23# pragma GCC system_header24#endif25 26#ifdef __cplusplus27 28// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html29 30// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.31// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is32// defined to XXYYZZ.33# define _LIBCPP_VERSION 22000034 35# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y36# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)37# define _LIBCPP_CONCAT3(X, Y, Z) _LIBCPP_CONCAT(X, _LIBCPP_CONCAT(Y, Z))38 39# if __STDC_HOSTED__ == 040# define _LIBCPP_FREESTANDING41# endif42 43# define _LIBCPP_TOSTRING2(x) #x44# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)45 46# ifndef __has_constexpr_builtin47# define __has_constexpr_builtin(x) 048# endif49 50// This checks wheter a Clang module is built51# ifndef __building_module52# define __building_module(...) 053# endif54 55// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by56// the compiler and '1' otherwise.57# ifndef __is_identifier58# define __is_identifier(__x) 159# endif60 61# ifndef __has_declspec_attribute62# define __has_declspec_attribute(__x) 063# endif64 65# define __has_keyword(__x) !(__is_identifier(__x))66 67# ifndef __has_warning68# define __has_warning(...) 069# endif70 71# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L72# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11"73# endif74 75# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)76# define _LIBCPP_ABI_VCRUNTIME77# endif78 79# if defined(__MVS__)80# include <features.h> // for __NATIVE_ASCII_F81# endif82 83# if defined(_WIN32)84# define _LIBCPP_WIN32API85# define _LIBCPP_SHORT_WCHAR 186// Both MinGW and native MSVC provide a "MSVC"-like environment87# define _LIBCPP_MSVCRT_LIKE88// If mingw not explicitly detected, assume using MS C runtime only if89// a MS compatibility version is specified.90# if defined(_MSC_VER) && !defined(__MINGW32__)91# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library92# endif93# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))94# define _LIBCPP_HAS_BITSCAN64 195# else96# define _LIBCPP_HAS_BITSCAN64 097# endif98# define _LIBCPP_HAS_OPEN_WITH_WCHAR 199# else100# define _LIBCPP_HAS_OPEN_WITH_WCHAR 0101# define _LIBCPP_HAS_BITSCAN64 0102# endif // defined(_WIN32)103 104# if defined(_AIX) && !defined(__64BIT__)105// The size of wchar is 2 byte on 32-bit mode on AIX.106# define _LIBCPP_SHORT_WCHAR 1107# endif108 109// Libc++ supports various implementations of std::random_device.110//111// _LIBCPP_USING_DEV_RANDOM112// Read entropy from the given file, by default `/dev/urandom`.113// If a token is provided, it is assumed to be the path to a file114// to read entropy from. This is the default behavior if nothing115// else is specified. This implementation requires storing state116// inside `std::random_device`.117//118// _LIBCPP_USING_ARC4_RANDOM119// Use arc4random(). This allows obtaining random data even when120// using sandboxing mechanisms. On some platforms like Apple, this121// is the recommended source of entropy for user-space programs.122// When this option is used, the token passed to `std::random_device`'s123// constructor *must* be "/dev/urandom" -- anything else is an error.124//125// _LIBCPP_USING_GETENTROPY126// Use getentropy().127// When this option is used, the token passed to `std::random_device`'s128// constructor *must* be "/dev/urandom" -- anything else is an error.129//130// _LIBCPP_USING_FUCHSIA_CPRNG131// Use Fuchsia's zx_cprng_draw() system call, which is specified to132// deliver high-quality entropy and cannot fail.133// When this option is used, the token passed to `std::random_device`'s134// constructor *must* be "/dev/urandom" -- anything else is an error.135//136// _LIBCPP_USING_WIN32_RANDOM137// Use rand_s(), for use on Windows.138// When this option is used, the token passed to `std::random_device`'s139// constructor *must* be "/dev/urandom" -- anything else is an error.140# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \141 defined(__DragonFly__)142# define _LIBCPP_USING_ARC4_RANDOM143# elif defined(__wasi__) || defined(__EMSCRIPTEN__)144# define _LIBCPP_USING_GETENTROPY145# elif defined(__Fuchsia__)146# define _LIBCPP_USING_FUCHSIA_CPRNG147# elif defined(_LIBCPP_WIN32API)148# define _LIBCPP_USING_WIN32_RANDOM149# else150# define _LIBCPP_USING_DEV_RANDOM151# endif152 153# ifndef _LIBCPP_CXX03_LANG154 155# define _LIBCPP_ALIGNOF(...) alignof(__VA_ARGS__)156# define _ALIGNAS_TYPE(x) alignas(x)157# define _ALIGNAS(x) alignas(x)158# define _NOEXCEPT noexcept159# define _NOEXCEPT_(...) noexcept(__VA_ARGS__)160# define _LIBCPP_CONSTEXPR constexpr161 162# else163 164# define _LIBCPP_ALIGNOF(...) _Alignof(__VA_ARGS__)165# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))166# define _ALIGNAS(x) __attribute__((__aligned__(x)))167# define nullptr __nullptr168# define _NOEXCEPT throw()169# define _NOEXCEPT_(...)170# define static_assert(...) _Static_assert(__VA_ARGS__)171# define decltype(...) __decltype(__VA_ARGS__)172# define _LIBCPP_CONSTEXPR173 174typedef __char16_t char16_t;175typedef __char32_t char32_t;176 177# endif178 179# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)180 181# if __has_extension(blocks) && defined(__APPLE__)182# define _LIBCPP_HAS_BLOCKS_RUNTIME 1183# else184# define _LIBCPP_HAS_BLOCKS_RUNTIME 0185# endif186 187# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))188 189# if defined(_LIBCPP_OBJECT_FORMAT_COFF)190 191# ifdef _DLL192# define _LIBCPP_CRT_FUNC __declspec(dllimport)193# else194# define _LIBCPP_CRT_FUNC195# endif196 197# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY))198# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS199# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS200# define _LIBCPP_OVERRIDABLE_FUNC_VIS201# define _LIBCPP_EXPORTED_FROM_ABI202# elif defined(_LIBCPP_BUILDING_LIBRARY)203# if defined(__MINGW32__)204# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __declspec(dllexport)205# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS206# else207# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS208# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS __declspec(dllexport)209# endif210# define _LIBCPP_OVERRIDABLE_FUNC_VIS __declspec(dllexport)211# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)212# else213# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __declspec(dllimport)214# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS215# define _LIBCPP_OVERRIDABLE_FUNC_VIS216# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)217# endif218 219# define _LIBCPP_HIDDEN220# define _LIBCPP_TEMPLATE_DATA_VIS221# define _LIBCPP_NAMESPACE_VISIBILITY222 223# else224 225# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)226# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis)))227# else228# define _LIBCPP_VISIBILITY(vis)229# endif230 231# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden")232# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default")233# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default")234# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default")235# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS236 237// TODO: Make this a proper customization point or remove the option to override it.238# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS239# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default")240# endif241 242# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)243# define _LIBCPP_NAMESPACE_VISIBILITY __attribute__((__type_visibility__("default")))244# elif !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)245# define _LIBCPP_NAMESPACE_VISIBILITY __attribute__((__visibility__("default")))246# else247# define _LIBCPP_NAMESPACE_VISIBILITY248# endif249 250# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)251 252# if __has_attribute(exclude_from_explicit_instantiation)253# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__))254# else255// Try to approximate the effect of exclude_from_explicit_instantiation256// (which is that entities are not assumed to be provided by explicit257// template instantiations in the dylib) by always inlining those entities.258# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE259# endif260 261# ifdef _LIBCPP_COMPILER_CLANG_BASED262# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push")263# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop")264# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str))265# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)266# elif defined(_LIBCPP_COMPILER_GCC)267# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push")268# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop")269# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)270# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str))271# else272# define _LIBCPP_DIAGNOSTIC_PUSH273# define _LIBCPP_DIAGNOSTIC_POP274# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)275# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)276# endif277 278// Macros to enter and leave a state where deprecation warnings are suppressed.279# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \280 _LIBCPP_DIAGNOSTIC_PUSH _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated") \281 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")282# define _LIBCPP_SUPPRESS_DEPRECATED_POP _LIBCPP_DIAGNOSTIC_POP283 284# if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST285# define _LIBCPP_HARDENING_SIG f286# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE287# define _LIBCPP_HARDENING_SIG s288# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG289# define _LIBCPP_HARDENING_SIG d290# else291# define _LIBCPP_HARDENING_SIG n // "none"292# endif293 294# if _LIBCPP_ASSERTION_SEMANTIC == _LIBCPP_ASSERTION_SEMANTIC_OBSERVE295# define _LIBCPP_ASSERTION_SEMANTIC_SIG o296# elif _LIBCPP_ASSERTION_SEMANTIC == _LIBCPP_ASSERTION_SEMANTIC_QUICK_ENFORCE297# define _LIBCPP_ASSERTION_SEMANTIC_SIG q298# elif _LIBCPP_ASSERTION_SEMANTIC == _LIBCPP_ASSERTION_SEMANTIC_ENFORCE299# define _LIBCPP_ASSERTION_SEMANTIC_SIG e300# else301# define _LIBCPP_ASSERTION_SEMANTIC_SIG i // `ignore`302# endif303 304# if !_LIBCPP_HAS_EXCEPTIONS305# define _LIBCPP_EXCEPTIONS_SIG n306# else307# define _LIBCPP_EXCEPTIONS_SIG e308# endif309 310# define _LIBCPP_ODR_SIGNATURE \311 _LIBCPP_CONCAT( \312 _LIBCPP_CONCAT(_LIBCPP_CONCAT(_LIBCPP_HARDENING_SIG, _LIBCPP_ASSERTION_SEMANTIC_SIG), _LIBCPP_EXCEPTIONS_SIG), \313 _LIBCPP_VERSION)314 315// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved316// on two levels:317// 1. The symbol is given hidden visibility, which ensures that users won't start exporting318// symbols from their dynamic library by means of using the libc++ headers. This ensures319// that those symbols stay private to the dynamic library in which it is defined.320//321// 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library.322// This ensures that no ODR violation can arise from mixing two TUs compiled with different323// versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the324// program contains two definitions of a function, the ODR requires them to be token-by-token325// equivalent, and the linker is allowed to pick either definition and discard the other one.326//327// For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled328// *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs329// compiled with different settings), the two definitions are both visible by the linker and they330// have the same name, but they have a meaningfully different implementation (one throws an exception331// and the other aborts the program). This violates the ODR and makes the program ill-formed, and in332// practice what will happen is that the linker will pick one of the definitions at random and will333// discard the other one. This can quite clearly lead to incorrect program behavior.334//335// A similar reasoning holds for many other properties that are ODR-affecting. Essentially any336// property that causes the code of a function to differ from the code in another configuration337// can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI338// tag, but we encode the ones that we think are most important: library version, exceptions, and339// hardening mode.340//341// Note that historically, solving this problem has been achieved in various ways, including342// force-inlining all functions or giving internal linkage to all functions. Both these previous343// solutions suffer from drawbacks that lead notably to code bloat.344//345// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend346// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library.347//348// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions349// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled350// name of a virtual function is part of its ABI, since some architectures like arm64e can sign351// the virtual function pointer in the vtable based on the mangled name of the function. Since352// we use an ABI tag that changes with each released version, the mangled name of the virtual353// function would change, which is incorrect. Note that it doesn't make much sense to change354// the implementation of a virtual function in an ABI-incompatible way in the first place,355// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable.356//357// The macro can be applied to record and enum types. When the tagged type is nested in358// a record this "parent" record needs to have the macro too. Another use case for applying359// this macro to records and unions is to apply an ABI tag to inline constexpr variables.360// This can be useful for inline variables that are implementation details which are expected361// to change in the future.362//363// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing364// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and365// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70.366# ifndef _LIBCPP_NO_ABI_TAG367# define _LIBCPP_HIDE_FROM_ABI \368 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \369 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_ODR_SIGNATURE))))370# else371# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION372# endif373# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION374 375# ifdef _LIBCPP_BUILDING_LIBRARY376# if _LIBCPP_ABI_VERSION > 1377# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI378# else379# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1380# endif381# else382# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI383# endif384 385// Clang modules take a significant compile time hit when pushing and popping diagnostics.386// Since all the headers are marked as system headers unless _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER is defined, we can387// simply disable this pushing and popping when _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER isn't defined.388# ifdef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER389# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \390 _LIBCPP_DIAGNOSTIC_PUSH \391 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++11-extensions") \392 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \393 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \394 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \395 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++23-extensions") \396 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \397 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \398 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \399 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++23-extensions")400# define _LIBCPP_POP_EXTENSION_DIAGNOSTICS _LIBCPP_DIAGNOSTIC_POP401# else402# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS403# define _LIBCPP_POP_EXTENSION_DIAGNOSTICS404# endif405 406// clang-format off407 408// The unversioned namespace is used when we want to be ABI compatible with other standard libraries in some way. There409// are two main categories where that's the case:410// - Historically, we have made exception types ABI compatible with libstdc++ to allow throwing them between libstdc++411// and libc++. This is not used anymore for new exception types, since there is no use-case for it anymore.412// - Types and functions which are used by the compiler are in the unversioned namespace, since the compiler has to know413// their mangling without the appropriate declaration in some cases.414// If it's not clear whether using the unversioned namespace is the correct thing to do, it's not. The versioned415// namespace (_LIBCPP_BEGIN_NAMESPACE_STD) should almost always be used.416# define _LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD \417 _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS namespace _LIBCPP_NAMESPACE_VISIBILITY std {418 419# define _LIBCPP_END_UNVERSIONED_NAMESPACE_STD } _LIBCPP_POP_EXTENSION_DIAGNOSTICS420 421# define _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD inline namespace _LIBCPP_ABI_NAMESPACE {422# define _LIBCPP_END_NAMESPACE_STD } _LIBCPP_END_UNVERSIONED_NAMESPACE_STD423 424// TODO: This should really be in the versioned namespace425#define _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL _LIBCPP_BEGIN_UNVERSIONED_NAMESPACE_STD namespace experimental {426#define _LIBCPP_END_NAMESPACE_EXPERIMENTAL } _LIBCPP_END_UNVERSIONED_NAMESPACE_STD427 428#define _LIBCPP_BEGIN_NAMESPACE_LFTS _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL inline namespace fundamentals_v1 {429#define _LIBCPP_END_NAMESPACE_LFTS } _LIBCPP_END_NAMESPACE_EXPERIMENTAL430 431#define _LIBCPP_BEGIN_NAMESPACE_LFTS_V2 _LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL inline namespace fundamentals_v2 {432#define _LIBCPP_END_NAMESPACE_LFTS_V2 } _LIBCPP_END_NAMESPACE_EXPERIMENTAL433 434#ifdef _LIBCPP_ABI_NO_FILESYSTEM_INLINE_NAMESPACE435# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD namespace filesystem {436# define _LIBCPP_END_NAMESPACE_FILESYSTEM } _LIBCPP_END_NAMESPACE_STD437#else438# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD \439 inline namespace __fs { namespace filesystem {440 441# define _LIBCPP_END_NAMESPACE_FILESYSTEM }} _LIBCPP_END_NAMESPACE_STD442#endif443 444// clang-format on445 446# if __has_attribute(__enable_if__)447# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, "")))448# endif449 450# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER)451# define _LIBCPP_HAS_INT128 0452# else453# define _LIBCPP_HAS_INT128 1454# endif455 456# ifdef _LIBCPP_CXX03_LANG457# define _LIBCPP_DECLARE_STRONG_ENUM(x) \458 struct _LIBCPP_EXPORTED_FROM_ABI x { \459 enum __lx460// clang-format off461# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \462 __lx __v_; \463 _LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \464 _LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \465 _LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \466 };467// clang-format on468 469# else // _LIBCPP_CXX03_LANG470# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x471# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)472# endif // _LIBCPP_CXX03_LANG473 474# ifdef __FreeBSD__475# define _DECLARE_C99_LDBL_MATH 1476# endif477 478// If we are getting operator new from the MSVC CRT, then allocation overloads479// for align_val_t were added in 19.12, aka VS 2017 version 15.3.480# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912481# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0482# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)483// We're deferring to Microsoft's STL to provide aligned new et al. We don't484// have it unless the language feature test macro is defined.485# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0486# elif defined(__MVS__)487# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 0488# else489# define _LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION 1490# endif491 492# if !_LIBCPP_HAS_LIBRARY_ALIGNED_ALLOCATION || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)493# define _LIBCPP_HAS_ALIGNED_ALLOCATION 0494# else495# define _LIBCPP_HAS_ALIGNED_ALLOCATION 1496# endif497 498# if defined(__APPLE__) || defined(__FreeBSD__)499# define _LIBCPP_WCTYPE_IS_MASK500# endif501 502# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)503# define _LIBCPP_HAS_CHAR8_T 0504# else505# define _LIBCPP_HAS_CHAR8_T 1506# endif507 508// Deprecation macros.509//510// Deprecations warnings are always enabled, except when users explicitly opt-out511// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.512# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)513# if __has_attribute(__deprecated__)514# define _LIBCPP_DEPRECATED __attribute__((__deprecated__))515# define _LIBCPP_DEPRECATED_(m) __attribute__((__deprecated__(m)))516# elif _LIBCPP_STD_VER >= 14517# define _LIBCPP_DEPRECATED [[deprecated]]518# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]]519# else520# define _LIBCPP_DEPRECATED521# define _LIBCPP_DEPRECATED_(m)522# endif523# else524# define _LIBCPP_DEPRECATED525# define _LIBCPP_DEPRECATED_(m)526# endif527 528// FIXME: using `#warning` causes diagnostics from system headers which include deprecated headers. This can only be529// enabled again once https://github.com/llvm/llvm-project/pull/168041 (or a similar feature) has landed, since that530// allows suppression in system headers.531# if defined(__DEPRECATED) && __DEPRECATED && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) && 0532# define _LIBCPP_DIAGNOSE_DEPRECATED_HEADERS 1533# else534# define _LIBCPP_DIAGNOSE_DEPRECATED_HEADERS 0535# endif536 537# if !defined(_LIBCPP_CXX03_LANG)538# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED539# else540# define _LIBCPP_DEPRECATED_IN_CXX11541# endif542 543# if _LIBCPP_STD_VER >= 14544# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED545# else546# define _LIBCPP_DEPRECATED_IN_CXX14547# endif548 549# if _LIBCPP_STD_VER >= 17550# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED551# else552# define _LIBCPP_DEPRECATED_IN_CXX17553# endif554 555# if _LIBCPP_STD_VER >= 20556# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED557# else558# define _LIBCPP_DEPRECATED_IN_CXX20559# endif560 561# if _LIBCPP_STD_VER >= 23562# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED563# else564# define _LIBCPP_DEPRECATED_IN_CXX23565# endif566 567# if _LIBCPP_STD_VER >= 26568# define _LIBCPP_DEPRECATED_IN_CXX26 _LIBCPP_DEPRECATED569# define _LIBCPP_DEPRECATED_IN_CXX26_(m) _LIBCPP_DEPRECATED_(m)570# else571# define _LIBCPP_DEPRECATED_IN_CXX26572# define _LIBCPP_DEPRECATED_IN_CXX26_(m)573# endif574 575# if _LIBCPP_HAS_CHAR8_T576# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED577# else578# define _LIBCPP_DEPRECATED_WITH_CHAR8_T579# endif580 581# if _LIBCPP_STD_VER <= 11582# define _LIBCPP_EXPLICIT_SINCE_CXX14583# else584# define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit585# endif586 587# if _LIBCPP_STD_VER >= 23588# define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit589# else590# define _LIBCPP_EXPLICIT_SINCE_CXX23591# endif592 593# if _LIBCPP_STD_VER >= 14594# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr595# else596# define _LIBCPP_CONSTEXPR_SINCE_CXX14597# endif598 599# if _LIBCPP_STD_VER >= 17600# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr601# else602# define _LIBCPP_CONSTEXPR_SINCE_CXX17603# endif604 605# if _LIBCPP_STD_VER >= 20606# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr607# else608# define _LIBCPP_CONSTEXPR_SINCE_CXX20609# endif610 611# if _LIBCPP_STD_VER >= 23612# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr613# else614# define _LIBCPP_CONSTEXPR_SINCE_CXX23615# endif616 617# if _LIBCPP_STD_VER >= 26618# define _LIBCPP_CONSTEXPR_SINCE_CXX26 constexpr619# else620# define _LIBCPP_CONSTEXPR_SINCE_CXX26621# endif622 623# ifndef _LIBCPP_WEAK624# define _LIBCPP_WEAK __attribute__((__weak__))625# endif626 627// Thread API628// clang-format off629# if _LIBCPP_HAS_THREADS && \630 !_LIBCPP_HAS_THREAD_API_PTHREAD && \631 !_LIBCPP_HAS_THREAD_API_WIN32 && \632 !_LIBCPP_HAS_THREAD_API_EXTERNAL633 634# if defined(__FreeBSD__) || \635 defined(__wasi__) || \636 defined(__NetBSD__) || \637 defined(__OpenBSD__) || \638 defined(__NuttX__) || \639 defined(__linux__) || \640 defined(__GNU__) || \641 defined(__APPLE__) || \642 defined(__MVS__) || \643 defined(_AIX) || \644 defined(__EMSCRIPTEN__)645// clang-format on646# undef _LIBCPP_HAS_THREAD_API_PTHREAD647# define _LIBCPP_HAS_THREAD_API_PTHREAD 1648# elif defined(__Fuchsia__)649// TODO(44575): Switch to C11 thread API when possible.650# undef _LIBCPP_HAS_THREAD_API_PTHREAD651# define _LIBCPP_HAS_THREAD_API_PTHREAD 1652# elif defined(_LIBCPP_WIN32API)653# undef _LIBCPP_HAS_THREAD_API_WIN32654# define _LIBCPP_HAS_THREAD_API_WIN32 1655# else656# error "No thread API"657# endif // _LIBCPP_HAS_THREAD_API658# endif // _LIBCPP_HAS_THREADS659 660# if !_LIBCPP_HAS_THREAD_API_PTHREAD661# define _LIBCPP_HAS_COND_CLOCKWAIT 0662# elif (defined(__ANDROID__) && __ANDROID_API__ >= 30) || _LIBCPP_GLIBC_PREREQ(2, 30)663# define _LIBCPP_HAS_COND_CLOCKWAIT 1664# else665# define _LIBCPP_HAS_COND_CLOCKWAIT 0666# endif667 668# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_PTHREAD669# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be true when _LIBCPP_HAS_THREADS is true.670# endif671 672# if !_LIBCPP_HAS_THREADS && _LIBCPP_HAS_THREAD_API_EXTERNAL673# error _LIBCPP_HAS_THREAD_API_EXTERNAL may only be true when _LIBCPP_HAS_THREADS is true.674# endif675 676# if !_LIBCPP_HAS_MONOTONIC_CLOCK && _LIBCPP_HAS_THREADS677# error _LIBCPP_HAS_MONOTONIC_CLOCK may only be false when _LIBCPP_HAS_THREADS is false.678# endif679 680# if _LIBCPP_HAS_THREADS && !defined(__STDCPP_THREADS__)681# define __STDCPP_THREADS__ 1682# endif683 684// The glibc and Bionic implementation of pthreads implements685// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32686// mutexes have no destroy mechanism.687//688// This optimization can't be performed on Apple platforms, where689// pthread_mutex_destroy can allow the kernel to release resources.690// See https://llvm.org/D64298 for details.691//692// TODO(EricWF): Enable this optimization on Bionic after speaking to their693// respective stakeholders.694// clang-format off695# if (_LIBCPP_HAS_THREAD_API_PTHREAD && defined(__GLIBC__)) || \696 (_LIBCPP_HAS_THREAD_API_C11 && defined(__Fuchsia__)) || \697 _LIBCPP_HAS_THREAD_API_WIN32698// clang-format on699# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1700# else701# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 0702# endif703 704// Destroying a condvar is a nop on Windows.705//706// This optimization can't be performed on Apple platforms, where707// pthread_cond_destroy can allow the kernel to release resources.708// See https://llvm.org/D64298 for details.709//710// TODO(EricWF): This is potentially true for some pthread implementations711// as well.712# if (_LIBCPP_HAS_THREAD_API_C11 && defined(__Fuchsia__)) || _LIBCPP_HAS_THREAD_API_WIN32713# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1714# else715# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 0716# endif717 718# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \719 _LIBCPP_HAS_MUSL_LIBC || defined(__OpenBSD__) || defined(__LLVM_LIBC__)720# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE721# endif722 723# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)724# define _LIBCPP_HAS_C_ATOMIC_IMP 1725# define _LIBCPP_HAS_GCC_ATOMIC_IMP 0726# define _LIBCPP_HAS_EXTERNAL_ATOMIC_IMP 0727# elif defined(_LIBCPP_COMPILER_GCC)728# define _LIBCPP_HAS_C_ATOMIC_IMP 0729# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1730# define _LIBCPP_HAS_EXTERNAL_ATOMIC_IMP 0731# endif732 733# if !_LIBCPP_HAS_C_ATOMIC_IMP && !_LIBCPP_HAS_GCC_ATOMIC_IMP && !_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP734# define _LIBCPP_HAS_ATOMIC_HEADER 0735# else736# define _LIBCPP_HAS_ATOMIC_HEADER 1737# ifndef _LIBCPP_ATOMIC_FLAG_TYPE738# define _LIBCPP_ATOMIC_FLAG_TYPE bool739# endif740# endif741 742# if __has_attribute(__no_thread_safety_analysis__)743# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((__no_thread_safety_analysis__))744# else745# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS746# endif747 748# if _LIBCPP_STD_VER >= 20749# define _LIBCPP_CONSTINIT constinit750# elif __has_attribute(__require_constant_initialization__)751# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__))752# else753# define _LIBCPP_CONSTINIT754# endif755 756# if defined(__CUDACC__) || defined(__CUDA_ARCH__) || defined(__CUDA_LIBDEVICE__)757// The CUDA SDK contains an unfortunate definition for the __noinline__ macro,758// which breaks the regular __attribute__((__noinline__)) syntax. Therefore,759// when compiling for CUDA we use the non-underscored version of the noinline760// attribute.761//762// This is a temporary workaround and we still expect the CUDA SDK team to solve763// this issue properly in the SDK headers.764//765// See https://github.com/llvm/llvm-project/pull/73838 for more details.766# define _LIBCPP_NOINLINE __attribute__((noinline))767# elif __has_attribute(__noinline__)768# define _LIBCPP_NOINLINE __attribute__((__noinline__))769# else770# define _LIBCPP_NOINLINE771# endif772 773// We often repeat things just for handling wide characters in the library.774// When wide characters are disabled, it can be useful to have a quick way of775// disabling it without having to resort to #if-#endif, which has a larger776// impact on readability.777# if !_LIBCPP_HAS_WIDE_CHARACTERS778# define _LIBCPP_IF_WIDE_CHARACTERS(...)779# else780# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__781# endif782 783// clang-format off784# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh\")") _Pragma("push_macro(\"move\")") _Pragma("push_macro(\"erase\")")785# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh\")") _Pragma("pop_macro(\"move\")") _Pragma("pop_macro(\"erase\")")786// clang-format on787 788# ifndef _LIBCPP_NO_AUTO_LINK789# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)790# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)791# pragma comment(lib, "c++.lib")792# else793# pragma comment(lib, "libc++.lib")794# endif795# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)796# endif // _LIBCPP_NO_AUTO_LINK797 798// Configures the fopen close-on-exec mode character, if any. This string will799// be appended to any mode string used by fstream for fopen/fdopen.800//801// Not all platforms support this, but it helps avoid fd-leaks on platforms that802// do.803# if defined(__BIONIC__)804# define _LIBCPP_FOPEN_CLOEXEC_MODE "e"805# else806# define _LIBCPP_FOPEN_CLOEXEC_MODE807# endif808 809# if __has_cpp_attribute(msvc::no_unique_address)810// MSVC implements [[no_unique_address]] as a silent no-op currently.811// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.)812// However, MSVC implements [[msvc::no_unique_address]] which does what813// [[no_unique_address]] is supposed to do, in general.814# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]815# else816# define _LIBCPP_NO_UNIQUE_ADDRESS [[__no_unique_address__]]817# endif818 819// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these820// functions is gradually being added to existing C libraries. The conditions821// below check for known C library versions and conditions under which these822// functions are declared by the C library.823//824// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if825// __cpp_char8_t is defined or if C2X extensions are enabled. Determining826// the latter depends on internal GNU libc details that are not appropriate827// to depend on here, so any declarations present when __cpp_char8_t is not828// defined are ignored.829# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t)830# define _LIBCPP_HAS_C8RTOMB_MBRTOC8 1831# else832# define _LIBCPP_HAS_C8RTOMB_MBRTOC8 0833# endif834 835// There are a handful of public standard library types that are intended to836// support CTAD but don't need any explicit deduction guides to do so. This837// macro is used to mark them as such, which suppresses the838// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code839// with these classes.840# if _LIBCPP_STD_VER >= 17841# ifdef _LIBCPP_COMPILER_CLANG_BASED842# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \843 template <class... _Tag> \844 [[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...>845# else846# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \847 template <class... _Tag> \848 ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...>849# endif850# else851# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "")852# endif853 854# if defined(__OBJC__) && defined(_LIBCPP_APPLE_CLANG_VER)855# define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS856# endif857 858# define _PSTL_PRAGMA(x) _Pragma(#x)859 860// Enable SIMD for compilers that support OpenMP 4.0861# if (defined(_OPENMP) && _OPENMP >= 201307)862 863# define _PSTL_UDR_PRESENT864# define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd)865# define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd)866# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM))867# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM))868# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM))869# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM))870 871// Declaration of reduction functor, where872// NAME - the name of the functor873// OP - type of the callable object with the reduction operation874// omp_in - refers to the local partial result875// omp_out - refers to the final value of the combiner operator876// omp_priv - refers to the private copy of the initial value877// omp_orig - refers to the original variable to be reduced878# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \879 _PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig))880 881# elif defined(_LIBCPP_COMPILER_CLANG_BASED)882 883# define _PSTL_PRAGMA_SIMD _Pragma("clang loop vectorize(enable) interleave(enable)")884# define _PSTL_PRAGMA_DECLARE_SIMD885# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)")886# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)")887# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM)888# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM)889# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP)890 891# else // (defined(_OPENMP) && _OPENMP >= 201307)892 893# define _PSTL_PRAGMA_SIMD894# define _PSTL_PRAGMA_DECLARE_SIMD895# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM)896# define _PSTL_PRAGMA_SIMD_SCAN(PRM)897# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM)898# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM)899# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP)900 901# endif // (defined(_OPENMP) && _OPENMP >= 201307)902 903# define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED904 905// Optional attributes - these are useful for a better QoI, but not required to be available906 907# define _LIBCPP_NOALIAS __attribute__((__malloc__))908# define _LIBCPP_NODEBUG [[__gnu__::__nodebug__]]909# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__)))910# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100)))911# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \912 __attribute__((__format__(archetype, format_string_index, first_format_arg_index)))913# define _LIBCPP_PACKED __attribute__((__packed__))914 915# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)916# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))917# else918# define _LIBCPP_NO_CFI919# endif920 921# if __has_attribute(__using_if_exists__)922# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__))923# else924# define _LIBCPP_USING_IF_EXISTS925# endif926 927# if __has_cpp_attribute(_Clang::__no_destroy__)928# define _LIBCPP_NO_DESTROY [[_Clang::__no_destroy__]]929# else930# define _LIBCPP_NO_DESTROY931# endif932 933# if __has_attribute(__diagnose_if__)934# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning")))935# else936# define _LIBCPP_DIAGNOSE_WARNING(...)937# endif938 939# if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_APPLE_CLANG_VER) && \940 (!defined(_LIBCPP_CLANG_VER) || _LIBCPP_CLANG_VER >= 2001)941# define _LIBCPP_DIAGNOSE_IF(...) __attribute__((__diagnose_if__(__VA_ARGS__)))942# else943# define _LIBCPP_DIAGNOSE_IF(...)944# endif945 946# define _LIBCPP_DIAGNOSE_NULLPTR_IF(condition, condition_description) \947 _LIBCPP_DIAGNOSE_IF( \948 condition, \949 "null passed to callee that requires a non-null argument" condition_description, \950 "warning", \951 "nonnull")952 953# if __has_cpp_attribute(_Clang::__lifetimebound__)954# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]]955# else956# define _LIBCPP_LIFETIMEBOUND957# endif958 959// This is to work around https://llvm.org/PR156809960# ifndef _LIBCPP_CXX03_LANG961# define _LIBCPP_CTOR_LIFETIMEBOUND _LIBCPP_LIFETIMEBOUND962# else963# define _LIBCPP_CTOR_LIFETIMEBOUND964# endif965 966# if __has_cpp_attribute(_Clang::__noescape__)967# define _LIBCPP_NOESCAPE [[_Clang::__noescape__]]968# else969# define _LIBCPP_NOESCAPE970# endif971 972# if __has_cpp_attribute(_Clang::__no_specializations__)973# define _LIBCPP_NO_SPECIALIZATIONS \974 [[_Clang::__no_specializations__("Users are not allowed to specialize this standard library entity")]]975# else976# define _LIBCPP_NO_SPECIALIZATIONS977# endif978 979# if __has_cpp_attribute(_Clang::__preferred_name__)980# define _LIBCPP_PREFERRED_NAME(x) [[_Clang::__preferred_name__(x)]]981# else982# define _LIBCPP_PREFERRED_NAME(x)983# endif984 985# if __has_cpp_attribute(_Clang::__scoped_lockable__)986# define _LIBCPP_SCOPED_LOCKABLE [[_Clang::__scoped_lockable__]]987# else988# define _LIBCPP_SCOPED_LOCKABLE989# endif990 991# if __has_cpp_attribute(_Clang::__capability__)992# define _LIBCPP_CAPABILITY(...) [[_Clang::__capability__(__VA_ARGS__)]]993# else994# define _LIBCPP_CAPABILITY(...)995# endif996 997# if __has_attribute(__acquire_capability__)998# define _LIBCPP_ACQUIRE_CAPABILITY(...) __attribute__((__acquire_capability__(__VA_ARGS__)))999# else1000# define _LIBCPP_ACQUIRE_CAPABILITY(...)1001# endif1002 1003# if __has_cpp_attribute(_Clang::__try_acquire_capability__)1004# define _LIBCPP_TRY_ACQUIRE_CAPABILITY(...) [[_Clang::__try_acquire_capability__(__VA_ARGS__)]]1005# else1006# define _LIBCPP_TRY_ACQUIRE_CAPABILITY(...)1007# endif1008 1009# if __has_cpp_attribute(_Clang::__acquire_shared_capability__)1010# define _LIBCPP_ACQUIRE_SHARED_CAPABILITY [[_Clang::__acquire_shared_capability__]]1011# else1012# define _LIBCPP_ACQUIRE_SHARED_CAPABILITY1013# endif1014 1015# if __has_cpp_attribute(_Clang::__try_acquire_shared_capability__)1016# define _LIBCPP_TRY_ACQUIRE_SHARED_CAPABILITY(...) [[_Clang::__try_acquire_shared_capability__(__VA_ARGS__)]]1017# else1018# define _LIBCPP_TRY_ACQUIRE_SHARED_CAPABILITY(...)1019# endif1020 1021# if __has_cpp_attribute(_Clang::__release_capability__)1022# define _LIBCPP_RELEASE_CAPABILITY [[_Clang::__release_capability__]]1023# else1024# define _LIBCPP_RELEASE_CAPABILITY1025# endif1026 1027# if __has_cpp_attribute(_Clang::__release_shared_capability__)1028# define _LIBCPP_RELEASE_SHARED_CAPABILITY [[_Clang::__release_shared_capability__]]1029# else1030# define _LIBCPP_RELEASE_SHARED_CAPABILITY1031# endif1032 1033# if __has_attribute(__requires_capability__)1034# define _LIBCPP_REQUIRES_CAPABILITY(...) __attribute__((__requires_capability__(__VA_ARGS__)))1035# else1036# define _LIBCPP_REQUIRES_CAPABILITY(...)1037# endif1038 1039# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases)1040# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)1041# else1042# define _LIBCPP_DECLSPEC_EMPTY_BASES1043# endif1044 1045// Allow for build-time disabling of unsigned integer sanitization1046# if __has_attribute(no_sanitize) && !defined(_LIBCPP_COMPILER_GCC)1047# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))1048# else1049# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK1050# endif1051 1052# if __has_feature(nullability)1053# define _LIBCPP_DIAGNOSE_NULLPTR _Nonnull1054# else1055# define _LIBCPP_DIAGNOSE_NULLPTR1056# endif1057 1058#endif // __cplusplus1059 1060#endif // _LIBCPP___CONFIG1061