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-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___CONFIG 11#define _LIBCPP___CONFIG 12 13#include <__config_site> 14 15#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 16# pragma GCC system_header 17#endif 18 19#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 20# pragma clang deprecated( \ 21 _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES, \ 22 "_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES is deprecated in LLVM 18 and will be removed in LLVM 19") 23#endif 24#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) && !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 25# pragma clang deprecated( \ 26 _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES, \ 27 "_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES is deprecated in LLVM 18 and will be removed in LLVM 19") 28#endif 29 30#if defined(__apple_build_version__) 31// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403) 32# define _LIBCPP_COMPILER_CLANG_BASED 33# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 34#elif defined(__clang__) 35# define _LIBCPP_COMPILER_CLANG_BASED 36# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 37#elif defined(__GNUC__) 38# define _LIBCPP_COMPILER_GCC 39# define _LIBCPP_GCC_VER (__GNUC__ * 100 + __GNUC_MINOR__) 40#endif 41 42#ifdef __cplusplus 43 44// Warn if a compiler version is used that is not supported anymore 45// LLVM RELEASE Update the minimum compiler versions 46# if defined(_LIBCPP_CLANG_VER) 47# if _LIBCPP_CLANG_VER < 1600 48# warning "Libc++ only supports Clang 16 and later" 49# endif 50# elif defined(_LIBCPP_APPLE_CLANG_VER) 51# if _LIBCPP_APPLE_CLANG_VER < 1500 52# warning "Libc++ only supports AppleClang 15 and later" 53# endif 54# elif defined(_LIBCPP_GCC_VER) 55# if _LIBCPP_GCC_VER < 1300 56# warning "Libc++ only supports GCC 13 and later" 57# endif 58# endif 59 60// The attributes supported by clang are documented at https://clang.llvm.org/docs/AttributeReference.html 61 62// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM. 63// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is 64// defined to XXYYZZ. 65# define _LIBCPP_VERSION 190000 66 67# define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y 68# define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y) 69 70# if __STDC_HOSTED__ == 0 71# define _LIBCPP_FREESTANDING 72# endif 73 74// NOLINTBEGIN(libcpp-cpp-version-check) 75# ifndef _LIBCPP_STD_VER 76# if __cplusplus <= 201103L 77# define _LIBCPP_STD_VER 11 78# elif __cplusplus <= 201402L 79# define _LIBCPP_STD_VER 14 80# elif __cplusplus <= 201703L 81# define _LIBCPP_STD_VER 17 82# elif __cplusplus <= 202002L 83# define _LIBCPP_STD_VER 20 84# elif __cplusplus <= 202302L 85# define _LIBCPP_STD_VER 23 86# else 87// Expected release year of the next C++ standard 88# define _LIBCPP_STD_VER 26 89# endif 90# endif // _LIBCPP_STD_VER 91// NOLINTEND(libcpp-cpp-version-check) 92 93# if defined(__ELF__) 94# define _LIBCPP_OBJECT_FORMAT_ELF 1 95# elif defined(__MACH__) 96# define _LIBCPP_OBJECT_FORMAT_MACHO 1 97# elif defined(_WIN32) 98# define _LIBCPP_OBJECT_FORMAT_COFF 1 99# elif defined(__wasm__) 100# define _LIBCPP_OBJECT_FORMAT_WASM 1 101# elif defined(_AIX) 102# define _LIBCPP_OBJECT_FORMAT_XCOFF 1 103# else 104// ... add new file formats here ... 105# endif 106 107// ABI { 108 109# if _LIBCPP_ABI_VERSION >= 2 110// Change short string representation so that string data starts at offset 0, 111// improving its alignment in some cases. 112# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 113// Fix deque iterator type in order to support incomplete types. 114# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 115// Fix undefined behavior in how std::list stores its linked nodes. 116# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 117// Fix undefined behavior in how __tree stores its end and parent nodes. 118# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 119// Fix undefined behavior in how __hash_table stores its pointer types. 120# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 121# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 122# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 123// Define a key function for `bad_function_call` in the library, to centralize 124// its vtable and typeinfo to libc++ rather than having all other libraries 125// using that class define their own copies. 126# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 127// Override the default return value of exception::what() for 128// bad_function_call::what() with a string that is specific to 129// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 130// because it changes the vtable layout of bad_function_call. 131# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 132// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 133# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 134// Give reverse_iterator<T> one data member of type T, not two. 135// Also, in C++17 and later, don't derive iterator types from std::iterator. 136# define _LIBCPP_ABI_NO_ITERATOR_BASES 137// Use the smallest possible integer type to represent the index of the variant. 138// Previously libc++ used "unsigned int" exclusively. 139# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 140// Unstable attempt to provide a more optimized std::function 141# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 142// All the regex constants must be distinct and nonzero. 143# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 144// Re-worked external template instantiations for std::string with a focus on 145// performance and fast-path inlining. 146# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 147// Enable clang::trivial_abi on std::unique_ptr. 148# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 149// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 150# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 151// std::random_device holds some state when it uses an implementation that gets 152// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this 153// implementation to another one on a platform that has already shipped 154// std::random_device, one needs to retain the same object layout to remain ABI 155// compatible. This switch removes these workarounds for platforms that don't care 156// about ABI compatibility. 157# define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT 158// Don't export the legacy __basic_string_common class and its methods from the built library. 159# define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON 160// Don't export the legacy __vector_base_common class and its methods from the built library. 161# define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON 162// According to the Standard, `bitset::operator[] const` returns bool 163# define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL 164// Fix the implementation of CityHash used for std::hash<fundamental-type>. 165// This is an ABI break because `std::hash` will return a different result, 166// which means that hashing the same object in translation units built against 167// different versions of libc++ can return inconsistent results. This is especially 168// tricky since std::hash is used in the implementation of unordered containers. 169// 170// The incorrect implementation of CityHash has the problem that it drops some 171// bits on the floor. 172# define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION 173// Remove the base 10 implementation of std::to_chars from the dylib. 174// The implementation moved to the header, but we still export the symbols from 175// the dylib for backwards compatibility. 176# define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10 177// Define std::array/std::string_view iterators to be __wrap_iters instead of raw 178// pointers, which prevents people from relying on a non-portable implementation 179// detail. This is especially useful because enabling bounded iterators hardening 180// requires code not to make these assumptions. 181# define _LIBCPP_ABI_USE_WRAP_ITER_IN_STD_ARRAY 182# define _LIBCPP_ABI_USE_WRAP_ITER_IN_STD_STRING_VIEW 183# elif _LIBCPP_ABI_VERSION == 1 184# if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF)) 185// Enable compiling copies of now inline methods into the dylib to support 186// applications compiled against older libraries. This is unnecessary with 187// COFF dllexport semantics, since dllexport forces a non-inline definition 188// of inline functions to be emitted anyway. Our own non-inline copy would 189// conflict with the dllexport-emitted copy, so we disable it. For XCOFF, 190// the linker will take issue with the symbols in the shared object if the 191// weak inline methods get visibility (such as from -fvisibility-inlines-hidden), 192// so disable it. 193# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 194# endif 195// Feature macros for disabling pre ABI v1 features. All of these options 196// are deprecated. 197# if defined(__FreeBSD__) && __FreeBSD__ < 14 198# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 199# endif 200// For XCOFF linkers, we have problems if we see a weak hidden version of a symbol 201// in user code (like you get with -fvisibility-inlines-hidden) and then a strong def 202// in the library, so we need to always rely on the library version. 203# if defined(_AIX) 204# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 205# endif 206# endif 207 208# if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 209// Define a key function for `bad_function_call` in the library, to centralize 210// its vtable and typeinfo to libc++ rather than having all other libraries 211// using that class define their own copies. 212# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 213# endif 214 215// We had some bugs where we use [[no_unique_address]] together with construct_at, 216// which causes UB as the call on construct_at could write to overlapping subobjects 217// 218// https://github.com/llvm/llvm-project/issues/70506 219// https://github.com/llvm/llvm-project/issues/70494 220// 221// To fix the bug we had to change the ABI of some classes to remove [[no_unique_address]] under certain conditions. 222// The macro below is used for all classes whose ABI have changed as part of fixing these bugs. 223# define _LIBCPP_ABI_LLVM18_NO_UNIQUE_ADDRESS __attribute__((__abi_tag__("llvm18_nua"))) 224 225// Changes the iterator type of select containers (see below) to a bounded iterator that keeps track of whether it's 226// within the bounds of the original container and asserts it on every dereference. 227// 228// ABI impact: changes the iterator type of the relevant containers. 229// 230// Supported containers: 231// - `span`; 232// - `string_view`; 233// - `array`. 234// #define _LIBCPP_ABI_BOUNDED_ITERATORS 235 236// } ABI 237 238// HARDENING { 239 240// TODO(hardening): deprecate this in LLVM 19. 241// This is for backward compatibility -- make enabling `_LIBCPP_ENABLE_ASSERTIONS` (which predates hardening modes) 242// equivalent to setting the extensive mode. 243# ifdef _LIBCPP_ENABLE_ASSERTIONS 244# if _LIBCPP_ENABLE_ASSERTIONS != 0 && _LIBCPP_ENABLE_ASSERTIONS != 1 245# error "_LIBCPP_ENABLE_ASSERTIONS must be set to 0 or 1" 246# endif 247# if _LIBCPP_ENABLE_ASSERTIONS 248# define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_EXTENSIVE 249# endif 250# endif 251 252// The library provides the macro `_LIBCPP_HARDENING_MODE` which can be set to one of the following values: 253// 254// - `_LIBCPP_HARDENING_MODE_NONE`; 255// - `_LIBCPP_HARDENING_MODE_FAST`; 256// - `_LIBCPP_HARDENING_MODE_EXTENSIVE`; 257// - `_LIBCPP_HARDENING_MODE_DEBUG`. 258// 259// These values have the following effects: 260// 261// - `_LIBCPP_HARDENING_MODE_NONE` -- sets the hardening mode to "none" which disables all runtime hardening checks; 262// 263// - `_LIBCPP_HARDENING_MODE_FAST` -- sets that hardening mode to "fast". The fast mode enables security-critical checks 264// that can be done with relatively little runtime overhead in constant time; 265// 266// - `_LIBCPP_HARDENING_MODE_EXTENSIVE` -- sets the hardening mode to "extensive". The extensive mode is a superset of 267// the fast mode that additionally enables checks that are relatively cheap and prevent common types of logic errors 268// but are not necessarily security-critical; 269// 270// - `_LIBCPP_HARDENING_MODE_DEBUG` -- sets the hardening mode to "debug". The debug mode is a superset of the extensive 271// mode and enables all checks available in the library, including internal assertions. Checks that are part of the 272// debug mode can be very expensive and thus the debug mode is intended to be used for testing, not in production. 273 274// Inside the library, assertions are categorized so they can be cherry-picked based on the chosen hardening mode. These 275// macros are only for internal use -- users should only pick one of the high-level hardening modes described above. 276// 277// - `_LIBCPP_ASSERT_VALID_INPUT_RANGE` -- checks that ranges (whether expressed as an iterator pair, an iterator and 278// a sentinel, an iterator and a count, or a `std::range`) given as input to library functions are valid: 279// - the sentinel is reachable from the begin iterator; 280// - TODO(hardening): both iterators refer to the same container. 281// 282// - `_LIBCPP_ASSERT_VALID_ELEMENT_ACCESS` -- checks that any attempts to access a container element, whether through 283// the container object or through an iterator, are valid and do not attempt to go out of bounds or otherwise access 284// a non-existent element. For iterator checks to work, bounded iterators must be enabled in the ABI. Types like 285// `optional` and `function` are considered one-element containers for the purposes of this check. 286// 287// - `_LIBCPP_ASSERT_NON_NULL` -- checks that the pointer being dereferenced is not null. On most modern platforms zero 288// address does not refer to an actual location in memory, so a null pointer dereference would not compromize the 289// memory security of a program (however, it is still undefined behavior that can result in strange errors due to 290// compiler optimizations). 291// 292// - `_LIBCPP_ASSERT_NON_OVERLAPPING_RANGES` -- for functions that take several ranges as arguments, checks that the 293// given ranges do not overlap. 294// 295// - `_LIBCPP_ASSERT_VALID_DEALLOCATION` -- checks that an attempt to deallocate memory is valid (e.g. the given object 296// was allocated by the given allocator). Violating this category typically results in a memory leak. 297// 298// - `_LIBCPP_ASSERT_VALID_EXTERNAL_API_CALL` -- checks that a call to an external API doesn't fail in 299// an unexpected manner. This includes triggering documented cases of undefined behavior in an external library (like 300// attempting to unlock an unlocked mutex in pthreads). Any API external to the library falls under this category 301// (from system calls to compiler intrinsics). We generally don't expect these failures to compromize memory safety or 302// otherwise create an immediate security issue. 303// 304// - `_LIBCPP_ASSERT_COMPATIBLE_ALLOCATOR` -- checks any operations that exchange nodes between containers to make sure 305// the containers have compatible allocators. 306// 307// - `_LIBCPP_ASSERT_ARGUMENT_WITHIN_DOMAIN` -- checks that the given argument is within the domain of valid arguments 308// for the function. Violating this typically produces an incorrect result (e.g. the clamp algorithm returns the 309// original value without clamping it due to incorrect functors) or puts an object into an invalid state (e.g. 310// a string view where only a subset of elements is possible to access). This category is for assertions violating 311// which doesn't cause any immediate issues in the library -- whatever the consequences are, they will happen in the 312// user code. 313// 314// - `_LIBCPP_ASSERT_PEDANTIC` -- checks prerequisites which are imposed by the Standard, but violating which happens to 315// be benign in our implementation. 316// 317// - `_LIBCPP_ASSERT_SEMANTIC_REQUIREMENT` -- checks that the given argument satisfies the semantic requirements imposed 318// by the Standard. Typically, there is no simple way to completely prove that a semantic requirement is satisfied; 319// thus, this would often be a heuristic check and it might be quite expensive. 320// 321// - `_LIBCPP_ASSERT_INTERNAL` -- checks that internal invariants of the library hold. These assertions don't depend on 322// user input. 323// 324// - `_LIBCPP_ASSERT_UNCATEGORIZED` -- for assertions that haven't been properly classified yet. 325 326// clang-format off 327# define _LIBCPP_HARDENING_MODE_NONE (1 << 1) 328# define _LIBCPP_HARDENING_MODE_FAST (1 << 2) 329# define _LIBCPP_HARDENING_MODE_EXTENSIVE (1 << 4) // Deliberately not ordered. 330# define _LIBCPP_HARDENING_MODE_DEBUG (1 << 3) 331// clang-format on 332 333# ifndef _LIBCPP_HARDENING_MODE 334 335# ifndef _LIBCPP_HARDENING_MODE_DEFAULT 336# error _LIBCPP_HARDENING_MODE_DEFAULT is not defined. This definition should be set at configuration time in the \ 337`__config_site` header, please make sure your installation of libc++ is not broken. 338# endif 339 340# define _LIBCPP_HARDENING_MODE _LIBCPP_HARDENING_MODE_DEFAULT 341# endif 342 343# if _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_NONE && \ 344 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_FAST && \ 345 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_EXTENSIVE && \ 346 _LIBCPP_HARDENING_MODE != _LIBCPP_HARDENING_MODE_DEBUG 347# error _LIBCPP_HARDENING_MODE must be set to one of the following values: \ 348_LIBCPP_HARDENING_MODE_NONE, \ 349_LIBCPP_HARDENING_MODE_FAST, \ 350_LIBCPP_HARDENING_MODE_EXTENSIVE, \ 351_LIBCPP_HARDENING_MODE_DEBUG 352# endif 353 354// } HARDENING 355 356# define _LIBCPP_TOSTRING2(x) #x 357# define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 358 359// NOLINTNEXTLINE(libcpp-cpp-version-check) 360# if __cplusplus < 201103L 361# define _LIBCPP_CXX03_LANG 362# endif 363 364# ifndef __has_attribute 365# define __has_attribute(__x) 0 366# endif 367 368# ifndef __has_builtin 369# define __has_builtin(__x) 0 370# endif 371 372# ifndef __has_extension 373# define __has_extension(__x) 0 374# endif 375 376# ifndef __has_feature 377# define __has_feature(__x) 0 378# endif 379 380# ifndef __has_cpp_attribute 381# define __has_cpp_attribute(__x) 0 382# endif 383 384# ifndef __has_constexpr_builtin 385# define __has_constexpr_builtin(x) 0 386# endif 387 388// This checks wheter a Clang module is built 389# ifndef __building_module 390# define __building_module(...) 0 391# endif 392 393// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 394// the compiler and '1' otherwise. 395# ifndef __is_identifier 396# define __is_identifier(__x) 1 397# endif 398 399# ifndef __has_declspec_attribute 400# define __has_declspec_attribute(__x) 0 401# endif 402 403# define __has_keyword(__x) !(__is_identifier(__x)) 404 405# ifndef __has_include 406# define __has_include(...) 0 407# endif 408 409# ifndef __has_warning 410# define __has_warning(...) 0 411# endif 412 413# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L 414# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11" 415# endif 416 417// FIXME: ABI detection should be done via compiler builtin macros. This 418// is just a placeholder until Clang implements such macros. For now assume 419// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 420// and allow the user to explicitly specify the ABI to handle cases where this 421// heuristic falls short. 422# if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 423# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 424# elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 425# define _LIBCPP_ABI_ITANIUM 426# elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 427# define _LIBCPP_ABI_MICROSOFT 428# else 429# if defined(_WIN32) && defined(_MSC_VER) 430# define _LIBCPP_ABI_MICROSOFT 431# else 432# define _LIBCPP_ABI_ITANIUM 433# endif 434# endif 435 436# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 437# define _LIBCPP_ABI_VCRUNTIME 438# endif 439 440# if __has_feature(experimental_library) 441# ifndef _LIBCPP_ENABLE_EXPERIMENTAL 442# define _LIBCPP_ENABLE_EXPERIMENTAL 443# endif 444# endif 445 446// Incomplete features get their own specific disabling flags. This makes it 447// easier to grep for target specific flags once the feature is complete. 448# if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY) 449# define _LIBCPP_HAS_NO_INCOMPLETE_PSTL 450# define _LIBCPP_HAS_NO_EXPERIMENTAL_STOP_TOKEN 451# define _LIBCPP_HAS_NO_INCOMPLETE_TZDB 452# define _LIBCPP_HAS_NO_EXPERIMENTAL_SYNCSTREAM 453# endif 454 455// Need to detect which libc we're using if we're on Linux. 456# if defined(__linux__) 457# include <features.h> 458# if defined(__GLIBC_PREREQ) 459# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 460# else 461# define _LIBCPP_GLIBC_PREREQ(a, b) 0 462# endif // defined(__GLIBC_PREREQ) 463# endif // defined(__linux__) 464 465# if defined(__MVS__) 466# include <features.h> // for __NATIVE_ASCII_F 467# endif 468 469# ifndef __BYTE_ORDER__ 470# error \ 471 "Your compiler doesn't seem to define __BYTE_ORDER__, which is required by libc++ to know the endianness of your target platform" 472# endif 473 474# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 475# define _LIBCPP_LITTLE_ENDIAN 476# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 477# define _LIBCPP_BIG_ENDIAN 478# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 479 480# if defined(_WIN32) 481# define _LIBCPP_WIN32API 482# define _LIBCPP_SHORT_WCHAR 1 483// Both MinGW and native MSVC provide a "MSVC"-like environment 484# define _LIBCPP_MSVCRT_LIKE 485// If mingw not explicitly detected, assume using MS C runtime only if 486// a MS compatibility version is specified. 487# if defined(_MSC_VER) && !defined(__MINGW32__) 488# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 489# endif 490# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 491# define _LIBCPP_HAS_BITSCAN64 492# endif 493# define _LIBCPP_HAS_OPEN_WITH_WCHAR 494# endif // defined(_WIN32) 495 496# if defined(_AIX) && !defined(__64BIT__) 497// The size of wchar is 2 byte on 32-bit mode on AIX. 498# define _LIBCPP_SHORT_WCHAR 1 499# endif 500 501// Libc++ supports various implementations of std::random_device. 502// 503// _LIBCPP_USING_DEV_RANDOM 504// Read entropy from the given file, by default `/dev/urandom`. 505// If a token is provided, it is assumed to be the path to a file 506// to read entropy from. This is the default behavior if nothing 507// else is specified. This implementation requires storing state 508// inside `std::random_device`. 509// 510// _LIBCPP_USING_ARC4_RANDOM 511// Use arc4random(). This allows obtaining random data even when 512// using sandboxing mechanisms. On some platforms like Apple, this 513// is the recommended source of entropy for user-space programs. 514// When this option is used, the token passed to `std::random_device`'s 515// constructor *must* be "/dev/urandom" -- anything else is an error. 516// 517// _LIBCPP_USING_GETENTROPY 518// Use getentropy(). 519// When this option is used, the token passed to `std::random_device`'s 520// constructor *must* be "/dev/urandom" -- anything else is an error. 521// 522// _LIBCPP_USING_FUCHSIA_CPRNG 523// Use Fuchsia's zx_cprng_draw() system call, which is specified to 524// deliver high-quality entropy and cannot fail. 525// When this option is used, the token passed to `std::random_device`'s 526// constructor *must* be "/dev/urandom" -- anything else is an error. 527// 528// _LIBCPP_USING_NACL_RANDOM 529// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 530// including accesses to the special files under `/dev`. This implementation 531// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 532// When this option is used, the token passed to `std::random_device`'s 533// constructor *must* be "/dev/urandom" -- anything else is an error. 534// 535// _LIBCPP_USING_WIN32_RANDOM 536// Use rand_s(), for use on Windows. 537// When this option is used, the token passed to `std::random_device`'s 538// constructor *must* be "/dev/urandom" -- anything else is an error. 539# if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \ 540 defined(__DragonFly__) 541# define _LIBCPP_USING_ARC4_RANDOM 542# elif defined(__wasi__) || defined(__EMSCRIPTEN__) 543# define _LIBCPP_USING_GETENTROPY 544# elif defined(__Fuchsia__) 545# define _LIBCPP_USING_FUCHSIA_CPRNG 546# elif defined(__native_client__) 547# define _LIBCPP_USING_NACL_RANDOM 548# elif defined(_LIBCPP_WIN32API) 549# define _LIBCPP_USING_WIN32_RANDOM 550# else 551# define _LIBCPP_USING_DEV_RANDOM 552# endif 553 554# ifndef _LIBCPP_CXX03_LANG 555 556# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 557# define _ALIGNAS_TYPE(x) alignas(x) 558# define _ALIGNAS(x) alignas(x) 559# define _LIBCPP_NORETURN [[noreturn]] 560# define _NOEXCEPT noexcept 561# define _NOEXCEPT_(...) noexcept(__VA_ARGS__) 562# define _LIBCPP_CONSTEXPR constexpr 563 564# else 565 566# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 567# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 568# define _ALIGNAS(x) __attribute__((__aligned__(x))) 569# define _LIBCPP_NORETURN __attribute__((__noreturn__)) 570# define _LIBCPP_HAS_NO_NOEXCEPT 571# define nullptr __nullptr 572# define _NOEXCEPT throw() 573# define _NOEXCEPT_(...) 574# define static_assert(...) _Static_assert(__VA_ARGS__) 575# define decltype(...) __decltype(__VA_ARGS__) 576# define _LIBCPP_CONSTEXPR 577 578typedef __char16_t char16_t; 579typedef __char32_t char32_t; 580 581# endif 582 583# if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L 584# define _LIBCPP_HAS_NO_EXCEPTIONS 585# endif 586 587# define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 588 589# if defined(_LIBCPP_COMPILER_CLANG_BASED) 590 591# if defined(__APPLE__) 592# if defined(__i386__) || defined(__x86_64__) 593// use old string layout on x86_64 and i386 594# elif defined(__arm__) 595// use old string layout on arm (which does not include aarch64/arm64), except on watch ABIs 596# if defined(__ARM_ARCH_7K__) && __ARM_ARCH_7K__ >= 2 597# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 598# endif 599# else 600# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 601# endif 602# endif 603 604// Objective-C++ features (opt-in) 605# if __has_feature(objc_arc) 606# define _LIBCPP_HAS_OBJC_ARC 607# endif 608 609# if __has_feature(objc_arc_weak) 610# define _LIBCPP_HAS_OBJC_ARC_WEAK 611# endif 612 613# if __has_extension(blocks) 614# define _LIBCPP_HAS_EXTENSION_BLOCKS 615# endif 616 617# if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 618# define _LIBCPP_HAS_BLOCKS_RUNTIME 619# endif 620 621# if !__has_feature(address_sanitizer) 622# define _LIBCPP_HAS_NO_ASAN 623# endif 624 625# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 626 627# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 628 629# elif defined(_LIBCPP_COMPILER_GCC) 630 631# if !defined(__SANITIZE_ADDRESS__) 632# define _LIBCPP_HAS_NO_ASAN 633# endif 634 635# define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__)) 636 637# define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 638 639# endif // _LIBCPP_COMPILER_[CLANG|GCC] 640 641# if defined(_LIBCPP_OBJECT_FORMAT_COFF) 642 643# ifdef _DLL 644# define _LIBCPP_CRT_FUNC __declspec(dllimport) 645# else 646# define _LIBCPP_CRT_FUNC 647# endif 648 649# if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY)) 650# define _LIBCPP_DLL_VIS 651# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 652# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 653# define _LIBCPP_OVERRIDABLE_FUNC_VIS 654# define _LIBCPP_EXPORTED_FROM_ABI 655# elif defined(_LIBCPP_BUILDING_LIBRARY) 656# define _LIBCPP_DLL_VIS __declspec(dllexport) 657# if defined(__MINGW32__) 658# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 659# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 660# else 661# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 662# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 663# endif 664# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 665# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 666# else 667# define _LIBCPP_DLL_VIS __declspec(dllimport) 668# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 669# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 670# define _LIBCPP_OVERRIDABLE_FUNC_VIS 671# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 672# endif 673 674# define _LIBCPP_HIDDEN 675# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 676# define _LIBCPP_TEMPLATE_VIS 677# define _LIBCPP_TEMPLATE_DATA_VIS 678# define _LIBCPP_TYPE_VISIBILITY_DEFAULT 679 680# else 681 682# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 683# define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis))) 684# else 685# define _LIBCPP_VISIBILITY(vis) 686# endif 687 688# define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden") 689# define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default") 690# define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default") 691# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default") 692# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 693 694// TODO: Make this a proper customization point or remove the option to override it. 695# ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 696# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default") 697# endif 698 699# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 700// The inline should be removed once PR32114 is resolved 701# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 702# else 703# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 704# endif 705 706// GCC doesn't support the type_visibility attribute, so we have to keep the visibility attribute on templates 707# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && !__has_attribute(__type_visibility__) 708# define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default"))) 709# else 710# define _LIBCPP_TEMPLATE_VIS 711# endif 712 713# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 714# define _LIBCPP_TYPE_VISIBILITY_DEFAULT __attribute__((__type_visibility__("default"))) 715# else 716# define _LIBCPP_TYPE_VISIBILITY_DEFAULT 717# endif 718 719# endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 720 721# if __has_attribute(exclude_from_explicit_instantiation) 722# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__)) 723# else 724// Try to approximate the effect of exclude_from_explicit_instantiation 725// (which is that entities are not assumed to be provided by explicit 726// template instantiations in the dylib) by always inlining those entities. 727# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 728# endif 729 730# ifdef _LIBCPP_COMPILER_CLANG_BASED 731# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") 732# define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") 733# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) 734# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 735# elif defined(_LIBCPP_COMPILER_GCC) 736# define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") 737# define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") 738# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 739# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) 740# else 741# define _LIBCPP_DIAGNOSTIC_PUSH 742# define _LIBCPP_DIAGNOSTIC_POP 743# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) 744# define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) 745# endif 746 747# if _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_FAST 748# define _LIBCPP_HARDENING_SIG f 749# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_EXTENSIVE 750# define _LIBCPP_HARDENING_SIG s 751# elif _LIBCPP_HARDENING_MODE == _LIBCPP_HARDENING_MODE_DEBUG 752# define _LIBCPP_HARDENING_SIG d 753# else 754# define _LIBCPP_HARDENING_SIG n // "none" 755# endif 756 757# ifdef _LIBCPP_HAS_NO_EXCEPTIONS 758# define _LIBCPP_EXCEPTIONS_SIG n 759# else 760# define _LIBCPP_EXCEPTIONS_SIG e 761# endif 762 763# define _LIBCPP_ODR_SIGNATURE \ 764 _LIBCPP_CONCAT(_LIBCPP_CONCAT(_LIBCPP_HARDENING_SIG, _LIBCPP_EXCEPTIONS_SIG), _LIBCPP_VERSION) 765 766// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved 767// on two levels: 768// 1. The symbol is given hidden visibility, which ensures that users won't start exporting 769// symbols from their dynamic library by means of using the libc++ headers. This ensures 770// that those symbols stay private to the dynamic library in which it is defined. 771// 772// 2. The symbol is given an ABI tag that encodes the ODR-relevant properties of the library. 773// This ensures that no ODR violation can arise from mixing two TUs compiled with different 774// versions or configurations of libc++ (such as exceptions vs no-exceptions). Indeed, if the 775// program contains two definitions of a function, the ODR requires them to be token-by-token 776// equivalent, and the linker is allowed to pick either definition and discard the other one. 777// 778// For example, if a program contains a copy of `vector::at()` compiled with exceptions enabled 779// *and* a copy of `vector::at()` compiled with exceptions disabled (by means of having two TUs 780// compiled with different settings), the two definitions are both visible by the linker and they 781// have the same name, but they have a meaningfully different implementation (one throws an exception 782// and the other aborts the program). This violates the ODR and makes the program ill-formed, and in 783// practice what will happen is that the linker will pick one of the definitions at random and will 784// discard the other one. This can quite clearly lead to incorrect program behavior. 785// 786// A similar reasoning holds for many other properties that are ODR-affecting. Essentially any 787// property that causes the code of a function to differ from the code in another configuration 788// can be considered ODR-affecting. In practice, we don't encode all such properties in the ABI 789// tag, but we encode the ones that we think are most important: library version, exceptions, and 790// hardening mode. 791// 792// Note that historically, solving this problem has been achieved in various ways, including 793// force-inlining all functions or giving internal linkage to all functions. Both these previous 794// solutions suffer from drawbacks that lead notably to code bloat. 795// 796// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend 797// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library. 798// 799// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions 800// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled 801// name of a virtual function is part of its ABI, since some architectures like arm64e can sign 802// the virtual function pointer in the vtable based on the mangled name of the function. Since 803// we use an ABI tag that changes with each released version, the mangled name of the virtual 804// function would change, which is incorrect. Note that it doesn't make much sense to change 805// the implementation of a virtual function in an ABI-incompatible way in the first place, 806// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable. 807// 808// The macro can be applied to record and enum types. When the tagged type is nested in 809// a record this "parent" record needs to have the macro too. Another use case for applying 810// this macro to records and unions is to apply an ABI tag to inline constexpr variables. 811// This can be useful for inline variables that are implementation details which are expected 812// to change in the future. 813// 814// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing 815// the length of symbols with an ABI tag. In practice, we should remove the escape hatch and 816// use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70. 817# ifndef _LIBCPP_NO_ABI_TAG 818# define _LIBCPP_HIDE_FROM_ABI \ 819 _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION \ 820 __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_ODR_SIGNATURE)))) 821# else 822# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 823# endif 824# define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 825 826// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern 827// "C" function, as those lack mangling. 828# define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 829 830# ifdef _LIBCPP_BUILDING_LIBRARY 831# if _LIBCPP_ABI_VERSION > 1 832# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 833# else 834# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 835# endif 836# else 837# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 838# endif 839 840// TODO: Remove this workaround once we drop support for Clang 16 841#if __has_warning("-Wc++23-extensions") 842# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++23-extensions") 843#else 844# define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++2b-extensions") 845#endif 846 847// Clang modules take a significant compile time hit when pushing and popping diagnostics. 848// Since all the headers are marked as system headers in the modulemap, we can simply disable this 849// pushing and popping when building with clang modules. 850# if !__has_feature(modules) 851# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \ 852 _LIBCPP_DIAGNOSTIC_PUSH \ 853 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++11-extensions") \ 854 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \ 855 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \ 856 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \ 857 _LIBCPP_CLANG_DIAGNOSTIC_IGNORED_CXX23_EXTENSION \ 858 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++14-extensions") \ 859 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++17-extensions") \ 860 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++20-extensions") \ 861 _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++23-extensions") 862# define _LIBCPP_POP_EXTENSION_DIAGNOSTICS _LIBCPP_DIAGNOSTIC_POP 863# else 864# define _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS 865# define _LIBCPP_POP_EXTENSION_DIAGNOSTICS 866# endif 867 868// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 869// clang-format off 870# define _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_PUSH_EXTENSION_DIAGNOSTICS \ 871 namespace _LIBCPP_TYPE_VISIBILITY_DEFAULT std { \ 872 inline namespace _LIBCPP_ABI_NAMESPACE { 873# define _LIBCPP_END_NAMESPACE_STD }} _LIBCPP_POP_EXTENSION_DIAGNOSTICS 874 875# define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM _LIBCPP_BEGIN_NAMESPACE_STD \ 876 inline namespace __fs { namespace filesystem { 877 878# define _LIBCPP_END_NAMESPACE_FILESYSTEM }} _LIBCPP_END_NAMESPACE_STD 879// clang-format on 880 881# if __has_attribute(__enable_if__) 882# define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, ""))) 883# endif 884 885# if !defined(__SIZEOF_INT128__) || defined(_MSC_VER) 886# define _LIBCPP_HAS_NO_INT128 887# endif 888 889# ifdef _LIBCPP_CXX03_LANG 890# define _LIBCPP_DECLARE_STRONG_ENUM(x) \ 891 struct _LIBCPP_EXPORTED_FROM_ABI x { \ 892 enum __lx 893// clang-format off 894# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 895 __lx __v_; \ 896 _LIBCPP_HIDE_FROM_ABI x(__lx __v) : __v_(__v) {} \ 897 _LIBCPP_HIDE_FROM_ABI explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 898 _LIBCPP_HIDE_FROM_ABI operator int() const { return __v_; } \ 899 }; 900// clang-format on 901 902# else // _LIBCPP_CXX03_LANG 903# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class x 904# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 905# endif // _LIBCPP_CXX03_LANG 906 907# if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__NetBSD__) 908# define _LIBCPP_LOCALE__L_EXTENSIONS 1 909# endif 910 911# ifdef __FreeBSD__ 912# define _DECLARE_C99_LDBL_MATH 1 913# endif 914 915// If we are getting operator new from the MSVC CRT, then allocation overloads 916// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 917# if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 918# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 919# elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 920// We're deferring to Microsoft's STL to provide aligned new et al. We don't 921// have it unless the language feature test macro is defined. 922# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 923# elif defined(__MVS__) 924# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 925# endif 926 927# if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 928# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 929# endif 930 931// It is not yet possible to use aligned_alloc() on all Apple platforms since 932// 10.15 was the first version to ship an implementation of aligned_alloc(). 933# if defined(__APPLE__) 934# if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ 935 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500) 936# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 937# endif 938# elif defined(__ANDROID__) && __ANDROID_API__ < 28 939// Android only provides aligned_alloc when targeting API 28 or higher. 940# define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC 941# endif 942 943# if defined(__APPLE__) || defined(__FreeBSD__) 944# define _LIBCPP_HAS_DEFAULTRUNELOCALE 945# endif 946 947# if defined(__APPLE__) || defined(__FreeBSD__) 948# define _LIBCPP_WCTYPE_IS_MASK 949# endif 950 951# if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 952# define _LIBCPP_HAS_NO_CHAR8_T 953# endif 954 955// Deprecation macros. 956// 957// Deprecations warnings are always enabled, except when users explicitly opt-out 958// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 959# if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 960# if __has_attribute(__deprecated__) 961# define _LIBCPP_DEPRECATED __attribute__((__deprecated__)) 962# define _LIBCPP_DEPRECATED_(m) __attribute__((__deprecated__(m))) 963# elif _LIBCPP_STD_VER >= 14 964# define _LIBCPP_DEPRECATED [[deprecated]] 965# define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]] 966# else 967# define _LIBCPP_DEPRECATED 968# define _LIBCPP_DEPRECATED_(m) 969# endif 970# else 971# define _LIBCPP_DEPRECATED 972# define _LIBCPP_DEPRECATED_(m) 973# endif 974 975# if !defined(_LIBCPP_CXX03_LANG) 976# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 977# else 978# define _LIBCPP_DEPRECATED_IN_CXX11 979# endif 980 981# if _LIBCPP_STD_VER >= 14 982# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 983# else 984# define _LIBCPP_DEPRECATED_IN_CXX14 985# endif 986 987# if _LIBCPP_STD_VER >= 17 988# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 989# else 990# define _LIBCPP_DEPRECATED_IN_CXX17 991# endif 992 993# if _LIBCPP_STD_VER >= 20 994# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 995# else 996# define _LIBCPP_DEPRECATED_IN_CXX20 997# endif 998 999# if _LIBCPP_STD_VER >= 23 1000# define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED 1001# else 1002# define _LIBCPP_DEPRECATED_IN_CXX23 1003# endif 1004 1005# if _LIBCPP_STD_VER >= 26 1006# define _LIBCPP_DEPRECATED_IN_CXX26 _LIBCPP_DEPRECATED 1007# else 1008# define _LIBCPP_DEPRECATED_IN_CXX26 1009# endif 1010 1011# if !defined(_LIBCPP_HAS_NO_CHAR8_T) 1012# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 1013# else 1014# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 1015# endif 1016 1017// Macros to enter and leave a state where deprecation warnings are suppressed. 1018# if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 1019# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 1020 _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 1021 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 1022# define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop") 1023# else 1024# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1025# define _LIBCPP_SUPPRESS_DEPRECATED_POP 1026# endif 1027 1028# if _LIBCPP_STD_VER <= 11 1029# define _LIBCPP_EXPLICIT_SINCE_CXX14 1030# else 1031# define _LIBCPP_EXPLICIT_SINCE_CXX14 explicit 1032# endif 1033 1034# if _LIBCPP_STD_VER >= 23 1035# define _LIBCPP_EXPLICIT_SINCE_CXX23 explicit 1036# else 1037# define _LIBCPP_EXPLICIT_SINCE_CXX23 1038# endif 1039 1040# if _LIBCPP_STD_VER >= 14 1041# define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr 1042# else 1043# define _LIBCPP_CONSTEXPR_SINCE_CXX14 1044# endif 1045 1046# if _LIBCPP_STD_VER >= 17 1047# define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr 1048# else 1049# define _LIBCPP_CONSTEXPR_SINCE_CXX17 1050# endif 1051 1052# if _LIBCPP_STD_VER >= 20 1053# define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr 1054# else 1055# define _LIBCPP_CONSTEXPR_SINCE_CXX20 1056# endif 1057 1058# if _LIBCPP_STD_VER >= 23 1059# define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr 1060# else 1061# define _LIBCPP_CONSTEXPR_SINCE_CXX23 1062# endif 1063 1064# ifndef _LIBCPP_HAS_NO_ASAN 1065extern "C" _LIBCPP_EXPORTED_FROM_ABI void 1066__sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*); 1067extern "C" _LIBCPP_EXPORTED_FROM_ABI void __sanitizer_annotate_double_ended_contiguous_container( 1068 const void*, const void*, const void*, const void*, const void*, const void*); 1069extern "C" _LIBCPP_EXPORTED_FROM_ABI int 1070__sanitizer_verify_double_ended_contiguous_container(const void*, const void*, const void*, const void*); 1071# endif 1072 1073// Try to find out if RTTI is disabled. 1074# if !defined(__cpp_rtti) || __cpp_rtti < 199711L 1075# define _LIBCPP_HAS_NO_RTTI 1076# endif 1077 1078# ifndef _LIBCPP_WEAK 1079# define _LIBCPP_WEAK __attribute__((__weak__)) 1080# endif 1081 1082// Thread API 1083// clang-format off 1084# if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1085 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1086 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1087 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1088 1089# if defined(__FreeBSD__) || \ 1090 defined(__wasi__) || \ 1091 defined(__NetBSD__) || \ 1092 defined(__OpenBSD__) || \ 1093 defined(__NuttX__) || \ 1094 defined(__linux__) || \ 1095 defined(__GNU__) || \ 1096 defined(__APPLE__) || \ 1097 defined(__MVS__) || \ 1098 defined(_AIX) || \ 1099 defined(__EMSCRIPTEN__) 1100// clang-format on 1101# define _LIBCPP_HAS_THREAD_API_PTHREAD 1102# elif defined(__Fuchsia__) 1103// TODO(44575): Switch to C11 thread API when possible. 1104# define _LIBCPP_HAS_THREAD_API_PTHREAD 1105# elif defined(_LIBCPP_WIN32API) 1106# define _LIBCPP_HAS_THREAD_API_WIN32 1107# else 1108# error "No thread API" 1109# endif // _LIBCPP_HAS_THREAD_API 1110# endif // _LIBCPP_HAS_NO_THREADS 1111 1112# if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1113# if defined(__ANDROID__) && __ANDROID_API__ >= 30 1114# define _LIBCPP_HAS_COND_CLOCKWAIT 1115# elif defined(_LIBCPP_GLIBC_PREREQ) 1116# if _LIBCPP_GLIBC_PREREQ(2, 30) 1117# define _LIBCPP_HAS_COND_CLOCKWAIT 1118# endif 1119# endif 1120# endif 1121 1122# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1123# error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1124 _LIBCPP_HAS_NO_THREADS is not defined. 1125# endif 1126 1127# if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1128# error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1129 _LIBCPP_HAS_NO_THREADS is defined. 1130# endif 1131 1132# if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1133# error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1134 _LIBCPP_HAS_NO_THREADS is defined. 1135# endif 1136 1137# if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1138# define __STDCPP_THREADS__ 1 1139# endif 1140 1141// The glibc and Bionic implementation of pthreads implements 1142// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1143// mutexes have no destroy mechanism. 1144// 1145// This optimization can't be performed on Apple platforms, where 1146// pthread_mutex_destroy can allow the kernel to release resources. 1147// See https://llvm.org/D64298 for details. 1148// 1149// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1150// respective stakeholders. 1151// clang-format off 1152# if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) || \ 1153 (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1154 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1155// clang-format on 1156# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1157# endif 1158 1159// Destroying a condvar is a nop on Windows. 1160// 1161// This optimization can't be performed on Apple platforms, where 1162// pthread_cond_destroy can allow the kernel to release resources. 1163// See https://llvm.org/D64298 for details. 1164// 1165// TODO(EricWF): This is potentially true for some pthread implementations 1166// as well. 1167# if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1168# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1169# endif 1170 1171# if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) || \ 1172 defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) 1173# define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1174# endif 1175 1176# if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1177# define _LIBCPP_HAS_C_ATOMIC_IMP 1178# elif defined(_LIBCPP_COMPILER_GCC) 1179# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1180# endif 1181 1182# if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1183 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1184# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1185# else 1186# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1187# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1188# endif 1189# endif 1190 1191# if defined(__FreeBSD__) && defined(__clang__) && __has_attribute(__no_thread_safety_analysis__) 1192# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS __attribute__((__no_thread_safety_analysis__)) 1193# else 1194# define _LIBCPP_NO_THREAD_SAFETY_ANALYSIS 1195# endif 1196 1197# if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1198# if defined(__clang__) && __has_attribute(acquire_capability) 1199// Work around the attribute handling in clang. When both __declspec and 1200// __attribute__ are present, the processing goes awry preventing the definition 1201// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus 1202// combining the two does work. 1203# if !defined(_MSC_VER) 1204# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1205# endif 1206# endif 1207# endif 1208 1209# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1210# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1211# else 1212# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1213# endif 1214 1215# if _LIBCPP_STD_VER >= 20 1216# define _LIBCPP_CONSTINIT constinit 1217# elif __has_attribute(__require_constant_initialization__) 1218# define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) 1219# else 1220# define _LIBCPP_CONSTINIT 1221# endif 1222 1223# if defined(__CUDACC__) || defined(__CUDA_ARCH__) || defined(__CUDA_LIBDEVICE__) 1224// The CUDA SDK contains an unfortunate definition for the __noinline__ macro, 1225// which breaks the regular __attribute__((__noinline__)) syntax. Therefore, 1226// when compiling for CUDA we use the non-underscored version of the noinline 1227// attribute. 1228// 1229// This is a temporary workaround and we still expect the CUDA SDK team to solve 1230// this issue properly in the SDK headers. 1231// 1232// See https://github.com/llvm/llvm-project/pull/73838 for more details. 1233# define _LIBCPP_NOINLINE __attribute__((noinline)) 1234# elif __has_attribute(__noinline__) 1235# define _LIBCPP_NOINLINE __attribute__((__noinline__)) 1236# else 1237# define _LIBCPP_NOINLINE 1238# endif 1239 1240// We often repeat things just for handling wide characters in the library. 1241// When wide characters are disabled, it can be useful to have a quick way of 1242// disabling it without having to resort to #if-#endif, which has a larger 1243// impact on readability. 1244# if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1245# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1246# else 1247# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1248# endif 1249 1250# if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1251# define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1252# define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1253# define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1254# define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1255# define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION 1256# endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1257 1258# if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1259# define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1260# define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1261# define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1262# define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1263# endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1264 1265// clang-format off 1266# define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")") _Pragma("push_macro(\"refresh\")") _Pragma("push_macro(\"move\")") _Pragma("push_macro(\"erase\")") 1267# define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")") _Pragma("pop_macro(\"refresh\")") _Pragma("pop_macro(\"move\")") _Pragma("pop_macro(\"erase\")") 1268// clang-format on 1269 1270# ifndef _LIBCPP_NO_AUTO_LINK 1271# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1272# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1273# pragma comment(lib, "c++.lib") 1274# else 1275# pragma comment(lib, "libc++.lib") 1276# endif 1277# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1278# endif // _LIBCPP_NO_AUTO_LINK 1279 1280// Configures the fopen close-on-exec mode character, if any. This string will 1281// be appended to any mode string used by fstream for fopen/fdopen. 1282// 1283// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1284// do. 1285# if defined(__BIONIC__) 1286# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1287# else 1288# define _LIBCPP_FOPEN_CLOEXEC_MODE 1289# endif 1290 1291# if __has_cpp_attribute(msvc::no_unique_address) 1292// MSVC implements [[no_unique_address]] as a silent no-op currently. 1293// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) 1294// However, MSVC implements [[msvc::no_unique_address]] which does what 1295// [[no_unique_address]] is supposed to do, in general. 1296 1297// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or 1298// [[msvc::no_unique_address]] though. If/when it does implement 1299// [[msvc::no_unique_address]], this should be preferred though. 1300# define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] 1301# elif __has_cpp_attribute(no_unique_address) 1302# define _LIBCPP_NO_UNIQUE_ADDRESS [[__no_unique_address__]] 1303# else 1304# define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ 1305// Note that this can be replaced by #error as soon as clang-cl 1306// implements msvc::no_unique_address, since there should be no C++20 1307// compiler that doesn't support one of the two attributes at that point. 1308// We generally don't want to use this macro outside of C++20-only code, 1309// because using it conditionally in one language version only would make 1310// the ABI inconsistent. 1311# endif 1312 1313// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these 1314// functions is gradually being added to existing C libraries. The conditions 1315// below check for known C library versions and conditions under which these 1316// functions are declared by the C library. 1317# define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1318// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if 1319// __cpp_char8_t is defined or if C2X extensions are enabled. Determining 1320// the latter depends on internal GNU libc details that are not appropriate 1321// to depend on here, so any declarations present when __cpp_char8_t is not 1322// defined are ignored. 1323# if defined(_LIBCPP_GLIBC_PREREQ) 1324# if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t) 1325# undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8 1326# endif 1327# endif 1328 1329// There are a handful of public standard library types that are intended to 1330// support CTAD but don't need any explicit deduction guides to do so. This 1331// macro is used to mark them as such, which suppresses the 1332// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code 1333// with these classes. 1334# if _LIBCPP_STD_VER >= 17 1335# ifdef _LIBCPP_COMPILER_CLANG_BASED 1336# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) \ 1337 template <class... _Tag> \ 1338 [[maybe_unused]] _ClassName(typename _Tag::__allow_ctad...)->_ClassName<_Tag...> 1339# else 1340# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(ClassName) \ 1341 template <class... _Tag> \ 1342 ClassName(typename _Tag::__allow_ctad...)->ClassName<_Tag...> 1343# endif 1344# else 1345# define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "") 1346# endif 1347 1348// TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use 1349// compiler intrinsics in the Objective-C++ mode. 1350# ifdef __OBJC__ 1351# define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS 1352# endif 1353 1354# define _PSTL_PRAGMA(x) _Pragma(#x) 1355 1356// Enable SIMD for compilers that support OpenMP 4.0 1357# if (defined(_OPENMP) && _OPENMP >= 201307) 1358 1359# define _PSTL_UDR_PRESENT 1360# define _PSTL_PRAGMA_SIMD _PSTL_PRAGMA(omp simd) 1361# define _PSTL_PRAGMA_DECLARE_SIMD _PSTL_PRAGMA(omp declare simd) 1362# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _PSTL_PRAGMA(omp simd reduction(PRM)) 1363# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _PSTL_PRAGMA(omp simd reduction(inscan, PRM)) 1364# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan inclusive(PRM)) 1365# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) _PSTL_PRAGMA(omp scan exclusive(PRM)) 1366 1367// Declaration of reduction functor, where 1368// NAME - the name of the functor 1369// OP - type of the callable object with the reduction operation 1370// omp_in - refers to the local partial result 1371// omp_out - refers to the final value of the combiner operator 1372// omp_priv - refers to the private copy of the initial value 1373// omp_orig - refers to the original variable to be reduced 1374# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) \ 1375 _PSTL_PRAGMA(omp declare reduction(NAME:OP : omp_out(omp_in)) initializer(omp_priv = omp_orig)) 1376 1377# elif defined(_LIBCPP_COMPILER_CLANG_BASED) 1378 1379# define _PSTL_PRAGMA_SIMD _Pragma("clang loop vectorize(enable) interleave(enable)") 1380# define _PSTL_PRAGMA_DECLARE_SIMD 1381# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") 1382# define _PSTL_PRAGMA_SIMD_SCAN(PRM) _Pragma("clang loop vectorize(enable) interleave(enable)") 1383# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1384# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1385# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1386 1387# else // (defined(_OPENMP) && _OPENMP >= 201307) 1388 1389# define _PSTL_PRAGMA_SIMD 1390# define _PSTL_PRAGMA_DECLARE_SIMD 1391# define _PSTL_PRAGMA_SIMD_REDUCTION(PRM) 1392# define _PSTL_PRAGMA_SIMD_SCAN(PRM) 1393# define _PSTL_PRAGMA_SIMD_INCLUSIVE_SCAN(PRM) 1394# define _PSTL_PRAGMA_SIMD_EXCLUSIVE_SCAN(PRM) 1395# define _PSTL_PRAGMA_DECLARE_REDUCTION(NAME, OP) 1396 1397# endif // (defined(_OPENMP) && _OPENMP >= 201307) 1398 1399# define _PSTL_USE_NONTEMPORAL_STORES_IF_ALLOWED 1400 1401// Optional attributes - these are useful for a better QoI, but not required to be available 1402 1403# if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 1404# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 1405# else 1406# define _LIBCPP_NO_CFI 1407# endif 1408 1409# if __has_attribute(__malloc__) 1410# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 1411# else 1412# define _LIBCPP_NOALIAS 1413# endif 1414 1415# if __has_attribute(__using_if_exists__) 1416# define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__)) 1417# else 1418# define _LIBCPP_USING_IF_EXISTS 1419# endif 1420 1421# if __has_cpp_attribute(nodiscard) 1422# define _LIBCPP_NODISCARD [[__nodiscard__]] 1423# else 1424// We can't use GCC's [[gnu::warn_unused_result]] and 1425// __attribute__((warn_unused_result)), because GCC does not silence them via 1426// (void) cast. 1427# define _LIBCPP_NODISCARD 1428# endif 1429 1430// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1431// specified as such as an extension. 1432# if !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1433# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1434# else 1435# define _LIBCPP_NODISCARD_EXT 1436# endif 1437 1438# if _LIBCPP_STD_VER >= 20 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1439# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1440# else 1441# define _LIBCPP_NODISCARD_AFTER_CXX17 1442# endif 1443 1444# if __has_attribute(__no_destroy__) 1445# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1446# else 1447# define _LIBCPP_NO_DESTROY 1448# endif 1449 1450# if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1451# define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning"))) 1452# else 1453# define _LIBCPP_DIAGNOSE_WARNING(...) 1454# endif 1455 1456// Use a function like macro to imply that it must be followed by a semicolon 1457# if __has_cpp_attribute(fallthrough) 1458# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1459# elif __has_attribute(__fallthrough__) 1460# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1461# else 1462# define _LIBCPP_FALLTHROUGH() ((void)0) 1463# endif 1464 1465# if __has_cpp_attribute(_Clang::__lifetimebound__) 1466# define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]] 1467# else 1468# define _LIBCPP_LIFETIMEBOUND 1469# endif 1470 1471# if __has_attribute(__nodebug__) 1472# define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1473# else 1474# define _LIBCPP_NODEBUG 1475# endif 1476 1477# if __has_attribute(__standalone_debug__) 1478# define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1479# else 1480# define _LIBCPP_STANDALONE_DEBUG 1481# endif 1482 1483# if __has_attribute(__preferred_name__) 1484# define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1485# else 1486# define _LIBCPP_PREFERRED_NAME(x) 1487# endif 1488 1489# if __has_attribute(__no_sanitize__) 1490# define _LIBCPP_NO_SANITIZE(...) __attribute__((__no_sanitize__(__VA_ARGS__))) 1491# else 1492# define _LIBCPP_NO_SANITIZE(...) 1493# endif 1494 1495# if __has_attribute(__init_priority__) 1496# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100))) 1497# else 1498# define _LIBCPP_INIT_PRIORITY_MAX 1499# endif 1500 1501# if __has_attribute(__format__) 1502// The attribute uses 1-based indices for ordinary and static member functions. 1503// The attribute uses 2-based indices for non-static member functions. 1504# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1505 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1506# else 1507# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1508# endif 1509 1510# if __has_attribute(__packed__) 1511# define _LIBCPP_PACKED __attribute__((__packed__)) 1512# else 1513# define _LIBCPP_PACKED 1514# endif 1515 1516# if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases) 1517# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1518# else 1519# define _LIBCPP_DECLSPEC_EMPTY_BASES 1520# endif 1521 1522// Allow for build-time disabling of unsigned integer sanitization 1523# if __has_attribute(no_sanitize) && !defined(_LIBCPP_COMPILER_GCC) 1524# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 1525# else 1526# define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1527# endif 1528 1529// Clang-18 has support for deducing this, but it does not set the FTM. 1530# if defined(__cpp_explicit_this_parameter) || (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 1800) 1531# define _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER 1532# endif 1533 1534#endif // __cplusplus 1535 1536#endif // _LIBCPP___CONFIG 1537