1// -*- C++ -*- 2//===--------------------------- __config ---------------------------------===// 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#if defined(_MSC_VER) && !defined(__clang__) 16# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 18# endif 19#endif 20 21#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 22#pragma GCC system_header 23#endif 24 25#ifdef __cplusplus 26 27#define _LIBCPP_VERSION 14000 28 29#ifndef _LIBCPP_ABI_VERSION 30# define _LIBCPP_ABI_VERSION 1 31#endif 32 33#if __STDC_HOSTED__ == 0 34# define _LIBCPP_FREESTANDING 35#endif 36 37#ifndef _LIBCPP_STD_VER 38# if __cplusplus <= 201103L 39# define _LIBCPP_STD_VER 11 40# elif __cplusplus <= 201402L 41# define _LIBCPP_STD_VER 14 42# elif __cplusplus <= 201703L 43# define _LIBCPP_STD_VER 17 44# elif __cplusplus <= 202002L 45# define _LIBCPP_STD_VER 20 46# else 47# define _LIBCPP_STD_VER 21 // current year, or date of c++2b ratification 48# endif 49#endif // _LIBCPP_STD_VER 50 51#if defined(__ELF__) 52# define _LIBCPP_OBJECT_FORMAT_ELF 1 53#elif defined(__MACH__) 54# define _LIBCPP_OBJECT_FORMAT_MACHO 1 55#elif defined(_WIN32) 56# define _LIBCPP_OBJECT_FORMAT_COFF 1 57#elif defined(__wasm__) 58# define _LIBCPP_OBJECT_FORMAT_WASM 1 59#else 60 // ... add new file formats here ... 61#endif 62 63#if defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2 64// Change short string representation so that string data starts at offset 0, 65// improving its alignment in some cases. 66# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 67// Fix deque iterator type in order to support incomplete types. 68# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 69// Fix undefined behavior in how std::list stores its linked nodes. 70# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 71// Fix undefined behavior in how __tree stores its end and parent nodes. 72# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 73// Fix undefined behavior in how __hash_table stores its pointer types. 74# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 75# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 76# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 77// Don't use a nullptr_t simulation type in C++03 instead using C++11 nullptr 78// provided under the alternate keyword __nullptr, which changes the mangling 79// of nullptr_t. This option is ABI incompatible with GCC in C++03 mode. 80# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR 81// Define a key function for `bad_function_call` in the library, to centralize 82// its vtable and typeinfo to libc++ rather than having all other libraries 83// using that class define their own copies. 84# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 85// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 86# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 87// In C++20 and later, don't derive std::plus from std::binary_function, 88// nor std::negate from std::unary_function. 89# define _LIBCPP_ABI_NO_BINDER_BASES 90// Give reverse_iterator<T> one data member of type T, not two. 91// Also, in C++17 and later, don't derive iterator types from std::iterator. 92# define _LIBCPP_ABI_NO_ITERATOR_BASES 93// Use the smallest possible integer type to represent the index of the variant. 94// Previously libc++ used "unsigned int" exclusively. 95# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 96// Unstable attempt to provide a more optimized std::function 97# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 98// All the regex constants must be distinct and nonzero. 99# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 100// Use raw pointers, not wrapped ones, for std::span's iterator type. 101# define _LIBCPP_ABI_SPAN_POINTER_ITERATORS 102// Re-worked external template instantiations for std::string with a focus on 103// performance and fast-path inlining. 104# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 105// Enable clang::trivial_abi on std::unique_ptr. 106# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 107// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 108# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 109#elif _LIBCPP_ABI_VERSION == 1 110# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 111// Enable compiling copies of now inline methods into the dylib to support 112// applications compiled against older libraries. This is unnecessary with 113// COFF dllexport semantics, since dllexport forces a non-inline definition 114// of inline functions to be emitted anyway. Our own non-inline copy would 115// conflict with the dllexport-emitted copy, so we disable it. 116# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 117# endif 118// Feature macros for disabling pre ABI v1 features. All of these options 119// are deprecated. 120# if defined(__FreeBSD__) 121# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 122# endif 123#endif 124 125#if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2 126// Enable additional explicit instantiations of iostreams components. This 127// reduces the number of weak definitions generated in programs that use 128// iostreams by providing a single strong definition in the shared library. 129# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 130#endif 131 132#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y 133#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) 134 135#ifndef _LIBCPP_ABI_NAMESPACE 136# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION) 137#endif 138 139#if __cplusplus < 201103L 140#define _LIBCPP_CXX03_LANG 141#endif 142 143#ifndef __has_attribute 144#define __has_attribute(__x) 0 145#endif 146 147#ifndef __has_builtin 148#define __has_builtin(__x) 0 149#endif 150 151#ifndef __has_extension 152#define __has_extension(__x) 0 153#endif 154 155#ifndef __has_feature 156#define __has_feature(__x) 0 157#endif 158 159#ifndef __has_cpp_attribute 160#define __has_cpp_attribute(__x) 0 161#endif 162 163// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 164// the compiler and '1' otherwise. 165#ifndef __is_identifier 166#define __is_identifier(__x) 1 167#endif 168 169#ifndef __has_declspec_attribute 170#define __has_declspec_attribute(__x) 0 171#endif 172 173#define __has_keyword(__x) !(__is_identifier(__x)) 174 175#ifndef __has_include 176#define __has_include(...) 0 177#endif 178 179#if defined(__apple_build_version__) 180# define _LIBCPP_COMPILER_CLANG_BASED 181# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 182#elif defined(__clang__) 183# define _LIBCPP_COMPILER_CLANG_BASED 184# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 185#elif defined(__GNUC__) 186# define _LIBCPP_COMPILER_GCC 187#elif defined(_MSC_VER) 188# define _LIBCPP_COMPILER_MSVC 189#elif defined(__IBMCPP__) 190# define _LIBCPP_COMPILER_IBM 191#endif 192 193#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L 194#error "libc++ does not support using GCC with C++03. Please enable C++11" 195#endif 196 197// FIXME: ABI detection should be done via compiler builtin macros. This 198// is just a placeholder until Clang implements such macros. For now assume 199// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 200// and allow the user to explicitly specify the ABI to handle cases where this 201// heuristic falls short. 202#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 203# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 204#elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 205# define _LIBCPP_ABI_ITANIUM 206#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 207# define _LIBCPP_ABI_MICROSOFT 208#else 209# if defined(_WIN32) && defined(_MSC_VER) 210# define _LIBCPP_ABI_MICROSOFT 211# else 212# define _LIBCPP_ABI_ITANIUM 213# endif 214#endif 215 216#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 217# define _LIBCPP_ABI_VCRUNTIME 218#endif 219 220// Need to detect which libc we're using if we're on Linux. 221#if defined(__linux__) 222# include <features.h> 223# if defined(__GLIBC_PREREQ) 224# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 225# else 226# define _LIBCPP_GLIBC_PREREQ(a, b) 0 227# endif // defined(__GLIBC_PREREQ) 228#endif // defined(__linux__) 229 230#ifdef __LITTLE_ENDIAN__ 231# if __LITTLE_ENDIAN__ 232# define _LIBCPP_LITTLE_ENDIAN 233# endif // __LITTLE_ENDIAN__ 234#endif // __LITTLE_ENDIAN__ 235 236#ifdef __BIG_ENDIAN__ 237# if __BIG_ENDIAN__ 238# define _LIBCPP_BIG_ENDIAN 239# endif // __BIG_ENDIAN__ 240#endif // __BIG_ENDIAN__ 241 242#ifdef __BYTE_ORDER__ 243# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 244# define _LIBCPP_LITTLE_ENDIAN 245# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 246# define _LIBCPP_BIG_ENDIAN 247# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 248#endif // __BYTE_ORDER__ 249 250#ifdef __FreeBSD__ 251# include <sys/endian.h> 252# include <osreldate.h> 253# if _BYTE_ORDER == _LITTLE_ENDIAN 254# define _LIBCPP_LITTLE_ENDIAN 255# else // _BYTE_ORDER == _LITTLE_ENDIAN 256# define _LIBCPP_BIG_ENDIAN 257# endif // _BYTE_ORDER == _LITTLE_ENDIAN 258#endif // __FreeBSD__ 259 260#if defined(__NetBSD__) || defined(__OpenBSD__) 261# include <sys/endian.h> 262# if _BYTE_ORDER == _LITTLE_ENDIAN 263# define _LIBCPP_LITTLE_ENDIAN 264# else // _BYTE_ORDER == _LITTLE_ENDIAN 265# define _LIBCPP_BIG_ENDIAN 266# endif // _BYTE_ORDER == _LITTLE_ENDIAN 267#endif // defined(__NetBSD__) || defined(__OpenBSD__) 268 269#if defined(_WIN32) 270# define _LIBCPP_WIN32API 271# define _LIBCPP_LITTLE_ENDIAN 272# define _LIBCPP_SHORT_WCHAR 1 273// Both MinGW and native MSVC provide a "MSVC"-like environment 274# define _LIBCPP_MSVCRT_LIKE 275// If mingw not explicitly detected, assume using MS C runtime only if 276// a MS compatibility version is specified. 277# if defined(_MSC_VER) && !defined(__MINGW32__) 278# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 279# endif 280# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 281# define _LIBCPP_HAS_BITSCAN64 282# endif 283# define _LIBCPP_HAS_OPEN_WITH_WCHAR 284# if defined(_LIBCPP_MSVCRT) 285# define _LIBCPP_HAS_QUICK_EXIT 286# endif 287 288// Some CRT APIs are unavailable to store apps 289# if defined(WINAPI_FAMILY) 290# include <winapifamily.h> 291# if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \ 292 (!defined(WINAPI_PARTITION_SYSTEM) || \ 293 !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM)) 294# define _LIBCPP_WINDOWS_STORE_APP 295# endif 296# endif 297#endif // defined(_WIN32) 298 299#ifdef __sun__ 300# include <sys/isa_defs.h> 301# ifdef _LITTLE_ENDIAN 302# define _LIBCPP_LITTLE_ENDIAN 303# else 304# define _LIBCPP_BIG_ENDIAN 305# endif 306#endif // __sun__ 307 308#if defined(_AIX) && !defined(__64BIT__) 309 // The size of wchar is 2 byte on 32-bit mode on AIX. 310# define _LIBCPP_SHORT_WCHAR 1 311#endif 312 313#if defined(__OpenBSD__) 314 // Certain architectures provide arc4random(). Prefer using 315 // arc4random() over /dev/{u,}random to make it possible to obtain 316 // random data even when using sandboxing mechanisms such as chroots, 317 // Capsicum, etc. 318# define _LIBCPP_USING_ARC4_RANDOM 319#elif defined(__Fuchsia__) || defined(__wasi__) 320# define _LIBCPP_USING_GETENTROPY 321#elif defined(__native_client__) 322 // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 323 // including accesses to the special files under /dev. C++11's 324 // std::random_device is instead exposed through a NaCl syscall. 325# define _LIBCPP_USING_NACL_RANDOM 326#elif defined(_LIBCPP_WIN32API) 327# define _LIBCPP_USING_WIN32_RANDOM 328#else 329# define _LIBCPP_USING_DEV_RANDOM 330#endif 331 332#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 333# include <endian.h> 334# if __BYTE_ORDER == __LITTLE_ENDIAN 335# define _LIBCPP_LITTLE_ENDIAN 336# elif __BYTE_ORDER == __BIG_ENDIAN 337# define _LIBCPP_BIG_ENDIAN 338# else // __BYTE_ORDER == __BIG_ENDIAN 339# error unable to determine endian 340# endif 341#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 342 343#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 344# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 345#else 346# define _LIBCPP_NO_CFI 347#endif 348 349// If the compiler supports using_if_exists, pretend we have those functions and they'll 350// be picked up if the C library provides them. 351// 352// TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists 353// for platforms that don't have a conforming C11 library, so we can drop this whole thing. 354#if __has_attribute(using_if_exists) 355# define _LIBCPP_HAS_TIMESPEC_GET 356# define _LIBCPP_HAS_QUICK_EXIT 357# define _LIBCPP_HAS_ALIGNED_ALLOC 358#else 359#if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L 360# if defined(__FreeBSD__) 361# define _LIBCPP_HAS_ALIGNED_ALLOC 362# define _LIBCPP_HAS_QUICK_EXIT 363# if __FreeBSD_version >= 1300064 || \ 364 (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000) 365# define _LIBCPP_HAS_TIMESPEC_GET 366# endif 367# elif defined(__BIONIC__) 368# if __ANDROID_API__ >= 21 369# define _LIBCPP_HAS_QUICK_EXIT 370# endif 371# if __ANDROID_API__ >= 28 372# define _LIBCPP_HAS_ALIGNED_ALLOC 373# endif 374# if __ANDROID_API__ >= 29 375# define _LIBCPP_HAS_TIMESPEC_GET 376# endif 377# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__) 378# define _LIBCPP_HAS_ALIGNED_ALLOC 379# define _LIBCPP_HAS_QUICK_EXIT 380# define _LIBCPP_HAS_TIMESPEC_GET 381# elif defined(__OpenBSD__) 382# define _LIBCPP_HAS_ALIGNED_ALLOC 383# define _LIBCPP_HAS_TIMESPEC_GET 384# elif defined(__linux__) 385# if !defined(_LIBCPP_HAS_MUSL_LIBC) 386# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__) 387# define _LIBCPP_HAS_QUICK_EXIT 388# endif 389# if _LIBCPP_GLIBC_PREREQ(2, 17) 390# define _LIBCPP_HAS_ALIGNED_ALLOC 391# define _LIBCPP_HAS_TIMESPEC_GET 392# endif 393# else // defined(_LIBCPP_HAS_MUSL_LIBC) 394# define _LIBCPP_HAS_ALIGNED_ALLOC 395# define _LIBCPP_HAS_QUICK_EXIT 396# define _LIBCPP_HAS_TIMESPEC_GET 397# endif 398# elif defined(_LIBCPP_MSVCRT) 399 // Using Microsoft's C Runtime library, not MinGW 400# define _LIBCPP_HAS_TIMESPEC_GET 401# elif defined(__APPLE__) 402 // timespec_get and aligned_alloc were introduced in macOS 10.15 and 403 // aligned releases 404# if ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500) || \ 405 (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ 406 (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ 407 (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000)) 408# define _LIBCPP_HAS_ALIGNED_ALLOC 409# define _LIBCPP_HAS_TIMESPEC_GET 410# endif 411# endif // __APPLE__ 412#endif 413#endif // __has_attribute(using_if_exists) 414 415#ifndef _LIBCPP_CXX03_LANG 416# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 417#elif defined(_LIBCPP_COMPILER_CLANG_BASED) 418# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 419#else 420# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 421#endif 422 423#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 424 425#if defined(_LIBCPP_COMPILER_CLANG_BASED) 426 427#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT) 428# error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead 429#endif 430#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 431 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 432# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 433#endif 434 435#if __has_feature(cxx_alignas) 436# define _ALIGNAS_TYPE(x) alignas(x) 437# define _ALIGNAS(x) alignas(x) 438#else 439# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 440# define _ALIGNAS(x) __attribute__((__aligned__(x))) 441#endif 442 443#if __cplusplus < 201103L 444typedef __char16_t char16_t; 445typedef __char32_t char32_t; 446#endif 447 448#if !__has_feature(cxx_exceptions) 449# define _LIBCPP_NO_EXCEPTIONS 450#endif 451 452#if !(__has_feature(cxx_strong_enums)) 453#define _LIBCPP_HAS_NO_STRONG_ENUMS 454#endif 455 456#if __has_feature(cxx_attributes) 457# define _LIBCPP_NORETURN [[noreturn]] 458#else 459# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 460#endif 461 462#if !(__has_feature(cxx_nullptr)) 463# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR) 464# define nullptr __nullptr 465# else 466# define _LIBCPP_HAS_NO_NULLPTR 467# endif 468#endif 469 470// Objective-C++ features (opt-in) 471#if __has_feature(objc_arc) 472#define _LIBCPP_HAS_OBJC_ARC 473#endif 474 475#if __has_feature(objc_arc_weak) 476#define _LIBCPP_HAS_OBJC_ARC_WEAK 477#endif 478 479#if __has_extension(blocks) 480# define _LIBCPP_HAS_EXTENSION_BLOCKS 481#endif 482 483#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 484# define _LIBCPP_HAS_BLOCKS_RUNTIME 485#endif 486 487#if !(__has_feature(cxx_noexcept)) 488#define _LIBCPP_HAS_NO_NOEXCEPT 489#endif 490 491#if !__has_feature(address_sanitizer) 492#define _LIBCPP_HAS_NO_ASAN 493#endif 494 495// Allow for build-time disabling of unsigned integer sanitization 496#if __has_attribute(no_sanitize) 497#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 498#endif 499 500#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 501 502#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 503 504#elif defined(_LIBCPP_COMPILER_GCC) 505 506#define _ALIGNAS(x) __attribute__((__aligned__(x))) 507#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 508 509#define _LIBCPP_NORETURN __attribute__((noreturn)) 510 511#if !defined(__EXCEPTIONS) 512# define _LIBCPP_NO_EXCEPTIONS 513#endif 514 515#if !defined(__SANITIZE_ADDRESS__) 516#define _LIBCPP_HAS_NO_ASAN 517#endif 518 519#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 520 521#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 522 523#elif defined(_LIBCPP_COMPILER_MSVC) 524 525#define _LIBCPP_TOSTRING2(x) #x 526#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 527#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 528 529#if _MSC_VER < 1900 530#error "MSVC versions prior to Visual Studio 2015 are not supported" 531#endif 532 533#define __alignof__ __alignof 534#define _LIBCPP_NORETURN __declspec(noreturn) 535#define _ALIGNAS(x) __declspec(align(x)) 536#define _ALIGNAS_TYPE(x) alignas(x) 537 538#define _LIBCPP_WEAK 539 540#define _LIBCPP_HAS_NO_ASAN 541 542#define _LIBCPP_ALWAYS_INLINE __forceinline 543 544#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 545 546#define _LIBCPP_DISABLE_EXTENSION_WARNING 547 548#elif defined(_LIBCPP_COMPILER_IBM) 549 550#define _ALIGNAS(x) __attribute__((__aligned__(x))) 551#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 552#define _ATTRIBUTE(x) __attribute__((x)) 553#define _LIBCPP_NORETURN __attribute__((noreturn)) 554 555#define _LIBCPP_HAS_NO_UNICODE_CHARS 556 557#if defined(_AIX) 558#define __MULTILOCALE_API 559#endif 560 561#define _LIBCPP_HAS_NO_ASAN 562 563#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 564 565#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 566 567#define _LIBCPP_DISABLE_EXTENSION_WARNING 568 569#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 570 571#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 572 573#ifdef _DLL 574# define _LIBCPP_CRT_FUNC __declspec(dllimport) 575#else 576# define _LIBCPP_CRT_FUNC 577#endif 578 579#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 580# define _LIBCPP_DLL_VIS 581# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 582# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 583# define _LIBCPP_OVERRIDABLE_FUNC_VIS 584# define _LIBCPP_EXPORTED_FROM_ABI 585#elif defined(_LIBCPP_BUILDING_LIBRARY) 586# define _LIBCPP_DLL_VIS __declspec(dllexport) 587# if defined(__MINGW32__) 588# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 589# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 590# else 591# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 592# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 593# endif 594# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 595# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 596#else 597# define _LIBCPP_DLL_VIS __declspec(dllimport) 598# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 599# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 600# define _LIBCPP_OVERRIDABLE_FUNC_VIS 601# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 602#endif 603 604#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 605#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 606#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 607#define _LIBCPP_HIDDEN 608#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 609#define _LIBCPP_TEMPLATE_VIS 610#define _LIBCPP_TEMPLATE_DATA_VIS 611#define _LIBCPP_ENUM_VIS 612 613#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 614 615#ifndef _LIBCPP_HIDDEN 616# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 617# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 618# else 619# define _LIBCPP_HIDDEN 620# endif 621#endif 622 623#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 624# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 625// The inline should be removed once PR32114 is resolved 626# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 627# else 628# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 629# endif 630#endif 631 632#ifndef _LIBCPP_FUNC_VIS 633# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 634# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 635# else 636# define _LIBCPP_FUNC_VIS 637# endif 638#endif 639 640#ifndef _LIBCPP_TYPE_VIS 641# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 642# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 643# else 644# define _LIBCPP_TYPE_VIS 645# endif 646#endif 647 648#ifndef _LIBCPP_TEMPLATE_VIS 649# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 650# if __has_attribute(__type_visibility__) 651# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 652# else 653# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 654# endif 655# else 656# define _LIBCPP_TEMPLATE_VIS 657# endif 658#endif 659 660#ifndef _LIBCPP_TEMPLATE_DATA_VIS 661# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 662# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default"))) 663# else 664# define _LIBCPP_TEMPLATE_DATA_VIS 665# endif 666#endif 667 668#ifndef _LIBCPP_EXPORTED_FROM_ABI 669# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 670# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 671# else 672# define _LIBCPP_EXPORTED_FROM_ABI 673# endif 674#endif 675 676#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 677#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 678#endif 679 680#ifndef _LIBCPP_EXCEPTION_ABI 681# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 682# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 683# else 684# define _LIBCPP_EXCEPTION_ABI 685# endif 686#endif 687 688#ifndef _LIBCPP_ENUM_VIS 689# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 690# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 691# else 692# define _LIBCPP_ENUM_VIS 693# endif 694#endif 695 696#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 697# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 698# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 699# else 700# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 701# endif 702#endif 703 704#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 705#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 706#endif 707 708#if __has_attribute(internal_linkage) 709# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 710#else 711# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 712#endif 713 714#if __has_attribute(exclude_from_explicit_instantiation) 715# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 716#else 717 // Try to approximate the effect of exclude_from_explicit_instantiation 718 // (which is that entities are not assumed to be provided by explicit 719 // template instantiations in the dylib) by always inlining those entities. 720# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 721#endif 722 723#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 724# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 725# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 726# else 727# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 728# endif 729#endif 730 731#ifndef _LIBCPP_HIDE_FROM_ABI 732# if _LIBCPP_HIDE_FROM_ABI_PER_TU 733# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 734# else 735# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 736# endif 737#endif 738 739#ifdef _LIBCPP_BUILDING_LIBRARY 740# if _LIBCPP_ABI_VERSION > 1 741# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 742# else 743# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 744# endif 745#else 746# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 747#endif 748 749// Just so we can migrate to the new macros gradually. 750#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 751 752// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 753#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 754#define _LIBCPP_END_NAMESPACE_STD } } 755#define _VSTD std::_LIBCPP_ABI_NAMESPACE 756_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 757 758#if _LIBCPP_STD_VER >= 17 759#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 760 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 761#else 762#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 763 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 764#endif 765 766#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 767 _LIBCPP_END_NAMESPACE_STD } } 768 769#define _VSTD_FS _VSTD::__fs::filesystem 770 771#if __has_attribute(__enable_if__) 772# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 773#endif 774 775#ifndef _LIBCPP_HAS_NO_NOEXCEPT 776# define _NOEXCEPT noexcept 777# define _NOEXCEPT_(x) noexcept(x) 778#else 779# define _NOEXCEPT throw() 780# define _NOEXCEPT_(x) 781#endif 782 783#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 784typedef unsigned short char16_t; 785typedef unsigned int char32_t; 786#endif 787 788#ifndef __SIZEOF_INT128__ 789#define _LIBCPP_HAS_NO_INT128 790#endif 791 792#ifdef _LIBCPP_CXX03_LANG 793# define static_assert(...) _Static_assert(__VA_ARGS__) 794# define decltype(...) __decltype(__VA_ARGS__) 795#endif // _LIBCPP_CXX03_LANG 796 797#ifdef _LIBCPP_CXX03_LANG 798# define _LIBCPP_CONSTEXPR 799#else 800# define _LIBCPP_CONSTEXPR constexpr 801#endif 802 803#ifndef __cpp_consteval 804# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 805#else 806# define _LIBCPP_CONSTEVAL consteval 807#endif 808 809#if !defined(__cpp_concepts) || __cpp_concepts < 201907L 810#define _LIBCPP_HAS_NO_CONCEPTS 811#endif 812 813#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_HAS_NO_CONCEPTS) 814#define _LIBCPP_HAS_NO_RANGES 815#endif 816 817#ifdef _LIBCPP_CXX03_LANG 818# define _LIBCPP_DEFAULT {} 819#else 820# define _LIBCPP_DEFAULT = default; 821#endif 822 823#ifdef __GNUC__ 824# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 825#else 826# define _LIBCPP_NOALIAS 827#endif 828 829#if __has_attribute(using_if_exists) 830# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 831#else 832# define _LIBCPP_USING_IF_EXISTS 833#endif 834 835#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS 836# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 837# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 838 __lx __v_; \ 839 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 840 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 841 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 842 }; 843#else // _LIBCPP_HAS_NO_STRONG_ENUMS 844# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 845# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 846#endif // _LIBCPP_HAS_NO_STRONG_ENUMS 847 848// _LIBCPP_DEBUG potential values: 849// - undefined: No assertions. This is the default. 850// - 0: Basic assertions 851// - 1: Basic assertions + iterator validity checks. 852#if !defined(_LIBCPP_DEBUG) 853# define _LIBCPP_DEBUG_LEVEL 0 854#elif _LIBCPP_DEBUG == 0 855# define _LIBCPP_DEBUG_LEVEL 1 856#elif _LIBCPP_DEBUG == 1 857# define _LIBCPP_DEBUG_LEVEL 2 858#else 859# error Supported values for _LIBCPP_DEBUG are 0 and 1 860#endif 861 862// Libc++ allows disabling extern template instantiation declarations by 863// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE. 864// 865// Furthermore, when the Debug mode is enabled, we disable extern declarations 866// when building user code because we don't want to use the functions compiled 867// in the library, which might not have had the debug mode enabled when built. 868// However, some extern declarations need to be used, because code correctness 869// depends on it (several instances in <locale>). Those special declarations 870// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled 871// even when the debug mode is enabled. 872#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE) 873# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 874# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */ 875#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY) 876# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 877# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 878#else 879# define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 880# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 881#endif 882 883#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 884 defined(__sun__) || defined(__NetBSD__) 885#define _LIBCPP_LOCALE__L_EXTENSIONS 1 886#endif 887 888#ifdef __FreeBSD__ 889#define _DECLARE_C99_LDBL_MATH 1 890#endif 891 892// If we are getting operator new from the MSVC CRT, then allocation overloads 893// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 894#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 895# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 896#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 897 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 898 // have it unless the language feature test macro is defined. 899# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 900#elif defined(__MVS__) 901# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 902#endif 903 904#if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 905 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 906# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 907#endif 908 909#if defined(__APPLE__) || defined(__FreeBSD__) 910#define _LIBCPP_HAS_DEFAULTRUNELOCALE 911#endif 912 913#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 914#define _LIBCPP_WCTYPE_IS_MASK 915#endif 916 917#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 918#define _LIBCPP_HAS_NO_CHAR8_T 919#endif 920 921// Deprecation macros. 922// 923// Deprecations warnings are always enabled, except when users explicitly opt-out 924// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 925#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 926# if __has_attribute(deprecated) 927# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 928# elif _LIBCPP_STD_VER > 11 929# define _LIBCPP_DEPRECATED [[deprecated]] 930# else 931# define _LIBCPP_DEPRECATED 932# endif 933#else 934# define _LIBCPP_DEPRECATED 935#endif 936 937#if !defined(_LIBCPP_CXX03_LANG) 938# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 939#else 940# define _LIBCPP_DEPRECATED_IN_CXX11 941#endif 942 943#if _LIBCPP_STD_VER >= 14 944# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 945#else 946# define _LIBCPP_DEPRECATED_IN_CXX14 947#endif 948 949#if _LIBCPP_STD_VER >= 17 950# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 951#else 952# define _LIBCPP_DEPRECATED_IN_CXX17 953#endif 954 955#if _LIBCPP_STD_VER > 17 956# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 957#else 958# define _LIBCPP_DEPRECATED_IN_CXX20 959#endif 960 961#if !defined(_LIBCPP_HAS_NO_CHAR8_T) 962# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 963#else 964# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 965#endif 966 967// Macros to enter and leave a state where deprecation warnings are suppressed. 968#if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 969# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 970 _Pragma("GCC diagnostic push") \ 971 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 972 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 973# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 974 _Pragma("GCC diagnostic pop") 975#else 976# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 977# define _LIBCPP_SUPPRESS_DEPRECATED_POP 978#endif 979 980#if _LIBCPP_STD_VER <= 11 981# define _LIBCPP_EXPLICIT_AFTER_CXX11 982#else 983# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 984#endif 985 986#if _LIBCPP_STD_VER > 11 987# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 988#else 989# define _LIBCPP_CONSTEXPR_AFTER_CXX11 990#endif 991 992#if _LIBCPP_STD_VER > 14 993# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 994#else 995# define _LIBCPP_CONSTEXPR_AFTER_CXX14 996#endif 997 998#if _LIBCPP_STD_VER > 17 999# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 1000#else 1001# define _LIBCPP_CONSTEXPR_AFTER_CXX17 1002#endif 1003 1004#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 1005# define _LIBCPP_NODISCARD [[nodiscard]] 1006#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 1007# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 1008#else 1009// We can't use GCC's [[gnu::warn_unused_result]] and 1010// __attribute__((warn_unused_result)), because GCC does not silence them via 1011// (void) cast. 1012# define _LIBCPP_NODISCARD 1013#endif 1014 1015// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1016// specified as such as an extension. 1017#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1018# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1019#else 1020# define _LIBCPP_NODISCARD_EXT 1021#endif 1022 1023#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 1024 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 1025# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1026#else 1027# define _LIBCPP_NODISCARD_AFTER_CXX17 1028#endif 1029 1030#if !defined(_LIBCPP_DEBUG) && _LIBCPP_STD_VER > 11 1031# define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr 1032#else 1033# define _LIBCPP_CONSTEXPR_IF_NODEBUG 1034#endif 1035 1036#if __has_attribute(no_destroy) 1037# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1038#else 1039# define _LIBCPP_NO_DESTROY 1040#endif 1041 1042#ifndef _LIBCPP_HAS_NO_ASAN 1043extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container( 1044 const void *, const void *, const void *, const void *); 1045#endif 1046 1047// Try to find out if RTTI is disabled. 1048#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) 1049# define _LIBCPP_NO_RTTI 1050#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1051# define _LIBCPP_NO_RTTI 1052#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1053# define _LIBCPP_NO_RTTI 1054#endif 1055 1056#ifndef _LIBCPP_WEAK 1057#define _LIBCPP_WEAK __attribute__((__weak__)) 1058#endif 1059 1060// Thread API 1061#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1062 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1063 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1064 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1065# if defined(__FreeBSD__) || \ 1066 defined(__wasi__) || \ 1067 defined(__NetBSD__) || \ 1068 defined(__OpenBSD__) || \ 1069 defined(__NuttX__) || \ 1070 defined(__linux__) || \ 1071 defined(__GNU__) || \ 1072 defined(__APPLE__) || \ 1073 defined(__sun__) || \ 1074 defined(__MVS__) || \ 1075 defined(_AIX) 1076# define _LIBCPP_HAS_THREAD_API_PTHREAD 1077# elif defined(__Fuchsia__) 1078 // TODO(44575): Switch to C11 thread API when possible. 1079# define _LIBCPP_HAS_THREAD_API_PTHREAD 1080# elif defined(_LIBCPP_WIN32API) 1081# define _LIBCPP_HAS_THREAD_API_WIN32 1082# else 1083# error "No thread API" 1084# endif // _LIBCPP_HAS_THREAD_API 1085#endif // _LIBCPP_HAS_NO_THREADS 1086 1087#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1088#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1089#define _LIBCPP_HAS_COND_CLOCKWAIT 1090#elif defined(_LIBCPP_GLIBC_PREREQ) 1091#if _LIBCPP_GLIBC_PREREQ(2, 30) 1092#define _LIBCPP_HAS_COND_CLOCKWAIT 1093#endif 1094#endif 1095#endif 1096 1097#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1098#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1099 _LIBCPP_HAS_NO_THREADS is not defined. 1100#endif 1101 1102#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1103#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1104 _LIBCPP_HAS_NO_THREADS is defined. 1105#endif 1106 1107#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1108#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1109 _LIBCPP_HAS_NO_THREADS is defined. 1110#endif 1111 1112#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1113#define __STDCPP_THREADS__ 1 1114#endif 1115 1116// The glibc and Bionic implementation of pthreads implements 1117// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1118// mutexes have no destroy mechanism. 1119// 1120// This optimization can't be performed on Apple platforms, where 1121// pthread_mutex_destroy can allow the kernel to release resources. 1122// See https://llvm.org/D64298 for details. 1123// 1124// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1125// respective stakeholders. 1126#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1127 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1128 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1129# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1130#endif 1131 1132// Destroying a condvar is a nop on Windows. 1133// 1134// This optimization can't be performed on Apple platforms, where 1135// pthread_cond_destroy can allow the kernel to release resources. 1136// See https://llvm.org/D64298 for details. 1137// 1138// TODO(EricWF): This is potentially true for some pthread implementations 1139// as well. 1140#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1141 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1142# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1143#endif 1144 1145// Some systems do not provide gets() in their C library, for security reasons. 1146#if defined(_LIBCPP_MSVCRT) || \ 1147 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \ 1148 defined(__OpenBSD__) 1149# define _LIBCPP_C_HAS_NO_GETS 1150#endif 1151 1152#if defined(__BIONIC__) || defined(__NuttX__) || \ 1153 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) || \ 1154 defined(__MVS__) || defined(__OpenBSD__) 1155#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1156#endif 1157 1158#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1159# define _LIBCPP_HAS_C_ATOMIC_IMP 1160#elif defined(_LIBCPP_COMPILER_GCC) 1161# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1162#endif 1163 1164#if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1165 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1166 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)) \ 1167 || defined(_LIBCPP_HAS_NO_THREADS) 1168# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1169#else 1170# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1171# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1172# endif 1173# ifdef _LIBCPP_FREESTANDING 1174# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1175# endif 1176#endif 1177 1178#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1179#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1180#endif 1181 1182#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1183# if defined(__clang__) && __has_attribute(acquire_capability) 1184// Work around the attribute handling in clang. When both __declspec and 1185// __attribute__ are present, the processing goes awry preventing the definition 1186// of the types. 1187# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1188# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1189# endif 1190# endif 1191#endif 1192 1193#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1194# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1195#else 1196# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1197#endif 1198 1199#if __has_attribute(require_constant_initialization) 1200# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__)) 1201#else 1202# define _LIBCPP_SAFE_STATIC 1203#endif 1204 1205#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1206# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1207 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1208# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1209 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1210#else 1211# define _LIBCPP_DIAGNOSE_WARNING(...) 1212# define _LIBCPP_DIAGNOSE_ERROR(...) 1213#endif 1214 1215// Use a function like macro to imply that it must be followed by a semicolon 1216#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 1217# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1218#elif __has_cpp_attribute(clang::fallthrough) 1219# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1220#elif __has_attribute(__fallthrough__) 1221# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1222#else 1223# define _LIBCPP_FALLTHROUGH() ((void)0) 1224#endif 1225 1226#if __has_attribute(__nodebug__) 1227#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1228#else 1229#define _LIBCPP_NODEBUG 1230#endif 1231 1232#if __has_attribute(__standalone_debug__) 1233#define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1234#else 1235#define _LIBCPP_STANDALONE_DEBUG 1236#endif 1237 1238#if __has_attribute(__preferred_name__) 1239#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1240#else 1241#define _LIBCPP_PREFERRED_NAME(x) 1242#endif 1243 1244// We often repeat things just for handling wide characters in the library. 1245// When wide characters are disabled, it can be useful to have a quick way of 1246// disabling it without having to resort to #if-#endif, which has a larger 1247// impact on readability. 1248#if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1249# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1250#else 1251# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1252#endif 1253 1254#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1255 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1256# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1257#else 1258# define _LIBCPP_DECLSPEC_EMPTY_BASES 1259#endif 1260 1261#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1262#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1263#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1264#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1265#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1266#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1267 1268#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1269#define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1270#define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1271#define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1272#define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1273#define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1274#endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1275 1276#if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L 1277#define _LIBCPP_HAS_NO_COROUTINES 1278#endif 1279 1280#if !defined(__cpp_impl_three_way_comparison) || __cpp_impl_three_way_comparison < 201907L 1281#define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR 1282#endif 1283 1284#if defined(_LIBCPP_COMPILER_IBM) 1285#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1286#endif 1287 1288#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1289# define _LIBCPP_PUSH_MACROS 1290# define _LIBCPP_POP_MACROS 1291#else 1292 // Don't warn about macro conflicts when we can restore them at the 1293 // end of the header. 1294# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1295# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1296# endif 1297# if defined(_LIBCPP_COMPILER_MSVC) 1298# define _LIBCPP_PUSH_MACROS \ 1299 __pragma(push_macro("min")) \ 1300 __pragma(push_macro("max")) 1301# define _LIBCPP_POP_MACROS \ 1302 __pragma(pop_macro("min")) \ 1303 __pragma(pop_macro("max")) 1304# else 1305# define _LIBCPP_PUSH_MACROS \ 1306 _Pragma("push_macro(\"min\")") \ 1307 _Pragma("push_macro(\"max\")") 1308# define _LIBCPP_POP_MACROS \ 1309 _Pragma("pop_macro(\"min\")") \ 1310 _Pragma("pop_macro(\"max\")") 1311# endif 1312#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1313 1314#ifndef _LIBCPP_NO_AUTO_LINK 1315# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1316# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1317# pragma comment(lib, "c++.lib") 1318# else 1319# pragma comment(lib, "libc++.lib") 1320# endif 1321# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1322#endif // _LIBCPP_NO_AUTO_LINK 1323 1324// Configures the fopen close-on-exec mode character, if any. This string will 1325// be appended to any mode string used by fstream for fopen/fdopen. 1326// 1327// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1328// do. 1329#if defined(__BIONIC__) 1330# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1331#else 1332# define _LIBCPP_FOPEN_CLOEXEC_MODE 1333#endif 1334 1335// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1336// of functions used in cstdio may not be available for low API levels when 1337// using 64-bit file offsets on LP32. 1338#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1339#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1340#endif 1341 1342#if __has_attribute(init_priority) 1343 // TODO: Remove this once we drop support for building libc++ with old Clangs 1344# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1345 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1346# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1347# else 1348# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1349# endif 1350#else 1351# define _LIBCPP_INIT_PRIORITY_MAX 1352#endif 1353 1354#if defined(__GNUC__) || defined(__clang__) 1355#define _LIBCPP_FORMAT_PRINTF(a, b) \ 1356 __attribute__((__format__(__printf__, a, b))) 1357#else 1358#define _LIBCPP_FORMAT_PRINTF(a, b) 1359#endif 1360 1361#endif // __cplusplus 1362 1363#endif // _LIBCPP_CONFIG 1364