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#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// Define a key function for `bad_function_call` in the library, to centralize 78// its vtable and typeinfo to libc++ rather than having all other libraries 79// using that class define their own copies. 80# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 81// Override the default return value of exception::what() for 82// bad_function_call::what() with a string that is specific to 83// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break 84// because it changes the vtable layout of bad_function_call. 85# define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE 86// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 87# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 88// In C++20 and later, don't derive std::plus from std::binary_function, 89// nor std::negate from std::unary_function. 90# define _LIBCPP_ABI_NO_BINDER_BASES 91// Give reverse_iterator<T> one data member of type T, not two. 92// Also, in C++17 and later, don't derive iterator types from std::iterator. 93# define _LIBCPP_ABI_NO_ITERATOR_BASES 94// Use the smallest possible integer type to represent the index of the variant. 95// Previously libc++ used "unsigned int" exclusively. 96# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 97// Unstable attempt to provide a more optimized std::function 98# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 99// All the regex constants must be distinct and nonzero. 100# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 101// Use raw pointers, not wrapped ones, for std::span's iterator type. 102# define _LIBCPP_ABI_SPAN_POINTER_ITERATORS 103// Re-worked external template instantiations for std::string with a focus on 104// performance and fast-path inlining. 105# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 106// Enable clang::trivial_abi on std::unique_ptr. 107# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 108// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 109# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 110#elif _LIBCPP_ABI_VERSION == 1 111# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 112// Enable compiling copies of now inline methods into the dylib to support 113// applications compiled against older libraries. This is unnecessary with 114// COFF dllexport semantics, since dllexport forces a non-inline definition 115// of inline functions to be emitted anyway. Our own non-inline copy would 116// conflict with the dllexport-emitted copy, so we disable it. 117# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 118# endif 119// Feature macros for disabling pre ABI v1 features. All of these options 120// are deprecated. 121# if defined(__FreeBSD__) 122# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 123# endif 124#endif 125 126// By default, don't use a nullptr_t emulation type in C++03. 127// 128// This is technically an ABI break from previous releases, however it is 129// very unlikely to impact anyone. If a user is impacted by this break, 130// they can return to using the C++03 nullptr emulation by defining 131// _LIBCPP_ABI_USE_CXX03_NULLPTR_EMULATION. 132// 133// This switch will be removed entirely in favour of never providing a 134// C++03 emulation after one release. 135// 136// IMPORTANT: IF YOU ARE READING THIS AND YOU TURN THIS MACRO ON, PLEASE LEAVE 137// A COMMENT ON https://reviews.llvm.org/D109459 OR YOU WILL BE BROKEN 138// IN THE FUTURE WHEN WE REMOVE THE ABILITY TO USE THE C++03 EMULATION. 139#ifndef _LIBCPP_ABI_USE_CXX03_NULLPTR_EMULATION 140# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR 141#endif 142 143#if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2 144// Enable additional explicit instantiations of iostreams components. This 145// reduces the number of weak definitions generated in programs that use 146// iostreams by providing a single strong definition in the shared library. 147# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 148 149// Define a key function for `bad_function_call` in the library, to centralize 150// its vtable and typeinfo to libc++ rather than having all other libraries 151// using that class define their own copies. 152# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 153#endif 154 155#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y 156#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) 157 158#ifndef _LIBCPP_ABI_NAMESPACE 159# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION) 160#endif 161 162#if __cplusplus < 201103L 163#define _LIBCPP_CXX03_LANG 164#endif 165 166#ifndef __has_attribute 167#define __has_attribute(__x) 0 168#endif 169 170#ifndef __has_builtin 171#define __has_builtin(__x) 0 172#endif 173 174#ifndef __has_extension 175#define __has_extension(__x) 0 176#endif 177 178#ifndef __has_feature 179#define __has_feature(__x) 0 180#endif 181 182#ifndef __has_cpp_attribute 183#define __has_cpp_attribute(__x) 0 184#endif 185 186// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 187// the compiler and '1' otherwise. 188#ifndef __is_identifier 189#define __is_identifier(__x) 1 190#endif 191 192#ifndef __has_declspec_attribute 193#define __has_declspec_attribute(__x) 0 194#endif 195 196#define __has_keyword(__x) !(__is_identifier(__x)) 197 198#ifndef __has_include 199#define __has_include(...) 0 200#endif 201 202#if defined(__apple_build_version__) 203# define _LIBCPP_COMPILER_CLANG_BASED 204# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) 205#elif defined(__clang__) 206# define _LIBCPP_COMPILER_CLANG_BASED 207# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 208#elif defined(__GNUC__) 209# define _LIBCPP_COMPILER_GCC 210#elif defined(_MSC_VER) 211# define _LIBCPP_COMPILER_MSVC 212#elif defined(__IBMCPP__) 213# define _LIBCPP_COMPILER_IBM 214#endif 215 216#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L 217#error "libc++ does not support using GCC with C++03. Please enable C++11" 218#endif 219 220// FIXME: ABI detection should be done via compiler builtin macros. This 221// is just a placeholder until Clang implements such macros. For now assume 222// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 223// and allow the user to explicitly specify the ABI to handle cases where this 224// heuristic falls short. 225#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 226# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 227#elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 228# define _LIBCPP_ABI_ITANIUM 229#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 230# define _LIBCPP_ABI_MICROSOFT 231#else 232# if defined(_WIN32) && defined(_MSC_VER) 233# define _LIBCPP_ABI_MICROSOFT 234# else 235# define _LIBCPP_ABI_ITANIUM 236# endif 237#endif 238 239#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 240# define _LIBCPP_ABI_VCRUNTIME 241#endif 242 243// Need to detect which libc we're using if we're on Linux. 244#if defined(__linux__) 245# include <features.h> 246# if defined(__GLIBC_PREREQ) 247# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 248# else 249# define _LIBCPP_GLIBC_PREREQ(a, b) 0 250# endif // defined(__GLIBC_PREREQ) 251#endif // defined(__linux__) 252 253#ifdef __LITTLE_ENDIAN__ 254# if __LITTLE_ENDIAN__ 255# define _LIBCPP_LITTLE_ENDIAN 256# endif // __LITTLE_ENDIAN__ 257#endif // __LITTLE_ENDIAN__ 258 259#ifdef __BIG_ENDIAN__ 260# if __BIG_ENDIAN__ 261# define _LIBCPP_BIG_ENDIAN 262# endif // __BIG_ENDIAN__ 263#endif // __BIG_ENDIAN__ 264 265#ifdef __BYTE_ORDER__ 266# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 267# define _LIBCPP_LITTLE_ENDIAN 268# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 269# define _LIBCPP_BIG_ENDIAN 270# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 271#endif // __BYTE_ORDER__ 272 273#ifdef __FreeBSD__ 274# include <sys/endian.h> 275# include <osreldate.h> 276# if _BYTE_ORDER == _LITTLE_ENDIAN 277# define _LIBCPP_LITTLE_ENDIAN 278# else // _BYTE_ORDER == _LITTLE_ENDIAN 279# define _LIBCPP_BIG_ENDIAN 280# endif // _BYTE_ORDER == _LITTLE_ENDIAN 281#endif // __FreeBSD__ 282 283#if defined(__NetBSD__) || defined(__OpenBSD__) 284# include <sys/endian.h> 285# if _BYTE_ORDER == _LITTLE_ENDIAN 286# define _LIBCPP_LITTLE_ENDIAN 287# else // _BYTE_ORDER == _LITTLE_ENDIAN 288# define _LIBCPP_BIG_ENDIAN 289# endif // _BYTE_ORDER == _LITTLE_ENDIAN 290#endif // defined(__NetBSD__) || defined(__OpenBSD__) 291 292#if defined(_WIN32) 293# define _LIBCPP_WIN32API 294# define _LIBCPP_LITTLE_ENDIAN 295# define _LIBCPP_SHORT_WCHAR 1 296// Both MinGW and native MSVC provide a "MSVC"-like environment 297# define _LIBCPP_MSVCRT_LIKE 298// If mingw not explicitly detected, assume using MS C runtime only if 299// a MS compatibility version is specified. 300# if defined(_MSC_VER) && !defined(__MINGW32__) 301# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 302# endif 303# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 304# define _LIBCPP_HAS_BITSCAN64 305# endif 306# define _LIBCPP_HAS_OPEN_WITH_WCHAR 307# if defined(_LIBCPP_MSVCRT) 308# define _LIBCPP_HAS_QUICK_EXIT 309# endif 310 311// Some CRT APIs are unavailable to store apps 312# if defined(WINAPI_FAMILY) 313# include <winapifamily.h> 314# if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \ 315 (!defined(WINAPI_PARTITION_SYSTEM) || \ 316 !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM)) 317# define _LIBCPP_WINDOWS_STORE_APP 318# endif 319# endif 320#endif // defined(_WIN32) 321 322#ifdef __sun__ 323# include <sys/isa_defs.h> 324# ifdef _LITTLE_ENDIAN 325# define _LIBCPP_LITTLE_ENDIAN 326# else 327# define _LIBCPP_BIG_ENDIAN 328# endif 329#endif // __sun__ 330 331#if defined(_AIX) && !defined(__64BIT__) 332 // The size of wchar is 2 byte on 32-bit mode on AIX. 333# define _LIBCPP_SHORT_WCHAR 1 334#endif 335 336// Libc++ supports various implementations of std::random_device. 337// 338// _LIBCPP_USING_DEV_RANDOM 339// Read entropy from the given file, by default `/dev/urandom`. 340// If a token is provided, it is assumed to be the path to a file 341// to read entropy from. This is the default behavior if nothing 342// else is specified. This implementation requires storing state 343// inside `std::random_device`. 344// 345// _LIBCPP_USING_ARC4_RANDOM 346// Use arc4random(). This allows obtaining random data even when 347// using sandboxing mechanisms. On some platforms like Apple, this 348// is the recommended source of entropy for user-space programs. 349// When this option is used, the token passed to `std::random_device`'s 350// constructor *must* be "/dev/urandom" -- anything else is an error. 351// 352// _LIBCPP_USING_GETENTROPY 353// Use getentropy(). 354// When this option is used, the token passed to `std::random_device`'s 355// constructor *must* be "/dev/urandom" -- anything else is an error. 356// 357// _LIBCPP_USING_FUCHSIA_CPRNG 358// Use Fuchsia's zx_cprng_draw() system call, which is specified to 359// deliver high-quality entropy and cannot fail. 360// When this option is used, the token passed to `std::random_device`'s 361// constructor *must* be "/dev/urandom" -- anything else is an error. 362// 363// _LIBCPP_USING_NACL_RANDOM 364// NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 365// including accesses to the special files under `/dev`. This implementation 366// uses the NaCL syscall `nacl_secure_random_init()` to get entropy. 367// When this option is used, the token passed to `std::random_device`'s 368// constructor *must* be "/dev/urandom" -- anything else is an error. 369// 370// _LIBCPP_USING_WIN32_RANDOM 371// Use rand_s(), for use on Windows. 372// When this option is used, the token passed to `std::random_device`'s 373// constructor *must* be "/dev/urandom" -- anything else is an error. 374#if defined(__OpenBSD__) 375# define _LIBCPP_USING_ARC4_RANDOM 376#elif defined(__wasi__) 377# define _LIBCPP_USING_GETENTROPY 378#elif defined(__Fuchsia__) 379# define _LIBCPP_USING_FUCHSIA_CPRNG 380#elif defined(__native_client__) 381# define _LIBCPP_USING_NACL_RANDOM 382#elif defined(_LIBCPP_WIN32API) 383# define _LIBCPP_USING_WIN32_RANDOM 384#else 385# define _LIBCPP_USING_DEV_RANDOM 386#endif 387 388#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 389# include <endian.h> 390# if __BYTE_ORDER == __LITTLE_ENDIAN 391# define _LIBCPP_LITTLE_ENDIAN 392# elif __BYTE_ORDER == __BIG_ENDIAN 393# define _LIBCPP_BIG_ENDIAN 394# else // __BYTE_ORDER == __BIG_ENDIAN 395# error unable to determine endian 396# endif 397#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 398 399#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 400# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 401#else 402# define _LIBCPP_NO_CFI 403#endif 404 405// If the compiler supports using_if_exists, pretend we have those functions and they'll 406// be picked up if the C library provides them. 407// 408// TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists 409// for platforms that don't have a conforming C11 library, so we can drop this whole thing. 410#if __has_attribute(using_if_exists) 411# define _LIBCPP_HAS_TIMESPEC_GET 412# define _LIBCPP_HAS_QUICK_EXIT 413# define _LIBCPP_HAS_ALIGNED_ALLOC 414#else 415#if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L 416# if defined(__FreeBSD__) 417# define _LIBCPP_HAS_ALIGNED_ALLOC 418# define _LIBCPP_HAS_QUICK_EXIT 419# if __FreeBSD_version >= 1300064 || \ 420 (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000) 421# define _LIBCPP_HAS_TIMESPEC_GET 422# endif 423# elif defined(__BIONIC__) 424# if __ANDROID_API__ >= 21 425# define _LIBCPP_HAS_QUICK_EXIT 426# endif 427# if __ANDROID_API__ >= 28 428# define _LIBCPP_HAS_ALIGNED_ALLOC 429# endif 430# if __ANDROID_API__ >= 29 431# define _LIBCPP_HAS_TIMESPEC_GET 432# endif 433# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__) 434# define _LIBCPP_HAS_ALIGNED_ALLOC 435# define _LIBCPP_HAS_QUICK_EXIT 436# define _LIBCPP_HAS_TIMESPEC_GET 437# elif defined(__OpenBSD__) 438# define _LIBCPP_HAS_ALIGNED_ALLOC 439# define _LIBCPP_HAS_TIMESPEC_GET 440# elif defined(__linux__) 441# if !defined(_LIBCPP_HAS_MUSL_LIBC) 442# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__) 443# define _LIBCPP_HAS_QUICK_EXIT 444# endif 445# if _LIBCPP_GLIBC_PREREQ(2, 17) 446# define _LIBCPP_HAS_ALIGNED_ALLOC 447# define _LIBCPP_HAS_TIMESPEC_GET 448# endif 449# else // defined(_LIBCPP_HAS_MUSL_LIBC) 450# define _LIBCPP_HAS_ALIGNED_ALLOC 451# define _LIBCPP_HAS_QUICK_EXIT 452# define _LIBCPP_HAS_TIMESPEC_GET 453# endif 454# elif defined(_LIBCPP_MSVCRT) 455 // Using Microsoft's C Runtime library, not MinGW 456# define _LIBCPP_HAS_TIMESPEC_GET 457# elif defined(__APPLE__) 458 // timespec_get and aligned_alloc were introduced in macOS 10.15 and 459 // aligned releases 460# if ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500) || \ 461 (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ 462 (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ 463 (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000)) 464# define _LIBCPP_HAS_ALIGNED_ALLOC 465# define _LIBCPP_HAS_TIMESPEC_GET 466# endif 467# endif // __APPLE__ 468#endif 469#endif // __has_attribute(using_if_exists) 470 471#ifndef _LIBCPP_CXX03_LANG 472# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 473#elif defined(_LIBCPP_COMPILER_CLANG_BASED) 474# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 475#else 476# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 477#endif 478 479#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 480 481#if defined(_LIBCPP_COMPILER_CLANG_BASED) 482 483#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT) 484# error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead 485#endif 486#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 487 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 488# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 489#endif 490 491#if __has_feature(cxx_alignas) 492# define _ALIGNAS_TYPE(x) alignas(x) 493# define _ALIGNAS(x) alignas(x) 494#else 495# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 496# define _ALIGNAS(x) __attribute__((__aligned__(x))) 497#endif 498 499#if __cplusplus < 201103L 500typedef __char16_t char16_t; 501typedef __char32_t char32_t; 502#endif 503 504#if !__has_feature(cxx_exceptions) 505# define _LIBCPP_NO_EXCEPTIONS 506#endif 507 508#if !(__has_feature(cxx_strong_enums)) 509#define _LIBCPP_HAS_NO_STRONG_ENUMS 510#endif 511 512#if __has_feature(cxx_attributes) 513# define _LIBCPP_NORETURN [[noreturn]] 514#else 515# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 516#endif 517 518#if !(__has_feature(cxx_nullptr)) 519# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR) 520# define nullptr __nullptr 521# else 522# define _LIBCPP_HAS_NO_NULLPTR 523# endif 524#endif 525 526// Objective-C++ features (opt-in) 527#if __has_feature(objc_arc) 528#define _LIBCPP_HAS_OBJC_ARC 529#endif 530 531#if __has_feature(objc_arc_weak) 532#define _LIBCPP_HAS_OBJC_ARC_WEAK 533#endif 534 535#if __has_extension(blocks) 536# define _LIBCPP_HAS_EXTENSION_BLOCKS 537#endif 538 539#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 540# define _LIBCPP_HAS_BLOCKS_RUNTIME 541#endif 542 543#if !(__has_feature(cxx_noexcept)) 544#define _LIBCPP_HAS_NO_NOEXCEPT 545#endif 546 547#if !__has_feature(address_sanitizer) 548#define _LIBCPP_HAS_NO_ASAN 549#endif 550 551// Allow for build-time disabling of unsigned integer sanitization 552#if __has_attribute(no_sanitize) 553#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 554#endif 555 556#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 557 558#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 559 560#elif defined(_LIBCPP_COMPILER_GCC) 561 562#define _ALIGNAS(x) __attribute__((__aligned__(x))) 563#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 564 565#define _LIBCPP_NORETURN __attribute__((noreturn)) 566 567#if !defined(__EXCEPTIONS) 568# define _LIBCPP_NO_EXCEPTIONS 569#endif 570 571#if !defined(__SANITIZE_ADDRESS__) 572#define _LIBCPP_HAS_NO_ASAN 573#endif 574 575#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 576 577#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 578 579#elif defined(_LIBCPP_COMPILER_MSVC) 580 581#define _LIBCPP_TOSTRING2(x) #x 582#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 583#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 584 585#if _MSC_VER < 1900 586#error "MSVC versions prior to Visual Studio 2015 are not supported" 587#endif 588 589#define __alignof__ __alignof 590#define _LIBCPP_NORETURN __declspec(noreturn) 591#define _ALIGNAS(x) __declspec(align(x)) 592#define _ALIGNAS_TYPE(x) alignas(x) 593 594#define _LIBCPP_WEAK 595 596#define _LIBCPP_HAS_NO_ASAN 597 598#define _LIBCPP_ALWAYS_INLINE __forceinline 599 600#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 601 602#define _LIBCPP_DISABLE_EXTENSION_WARNING 603 604#elif defined(_LIBCPP_COMPILER_IBM) 605 606#define _ALIGNAS(x) __attribute__((__aligned__(x))) 607#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 608#define _ATTRIBUTE(x) __attribute__((x)) 609#define _LIBCPP_NORETURN __attribute__((noreturn)) 610 611#define _LIBCPP_HAS_NO_UNICODE_CHARS 612 613#if defined(_AIX) 614#define __MULTILOCALE_API 615#endif 616 617#define _LIBCPP_HAS_NO_ASAN 618 619#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 620 621#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 622 623#define _LIBCPP_DISABLE_EXTENSION_WARNING 624 625#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 626 627#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 628 629#ifdef _DLL 630# define _LIBCPP_CRT_FUNC __declspec(dllimport) 631#else 632# define _LIBCPP_CRT_FUNC 633#endif 634 635#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 636# define _LIBCPP_DLL_VIS 637# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 638# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 639# define _LIBCPP_OVERRIDABLE_FUNC_VIS 640# define _LIBCPP_EXPORTED_FROM_ABI 641#elif defined(_LIBCPP_BUILDING_LIBRARY) 642# define _LIBCPP_DLL_VIS __declspec(dllexport) 643# if defined(__MINGW32__) 644# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 645# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 646# else 647# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 648# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 649# endif 650# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 651# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 652#else 653# define _LIBCPP_DLL_VIS __declspec(dllimport) 654# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 655# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 656# define _LIBCPP_OVERRIDABLE_FUNC_VIS 657# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 658#endif 659 660#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 661#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 662#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 663#define _LIBCPP_HIDDEN 664#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 665#define _LIBCPP_TEMPLATE_VIS 666#define _LIBCPP_TEMPLATE_DATA_VIS 667#define _LIBCPP_ENUM_VIS 668 669#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 670 671#ifndef _LIBCPP_HIDDEN 672# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 673# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 674# else 675# define _LIBCPP_HIDDEN 676# endif 677#endif 678 679#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 680# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 681// The inline should be removed once PR32114 is resolved 682# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 683# else 684# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 685# endif 686#endif 687 688#ifndef _LIBCPP_FUNC_VIS 689# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 690# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 691# else 692# define _LIBCPP_FUNC_VIS 693# endif 694#endif 695 696#ifndef _LIBCPP_TYPE_VIS 697# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 698# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 699# else 700# define _LIBCPP_TYPE_VIS 701# endif 702#endif 703 704#ifndef _LIBCPP_TEMPLATE_VIS 705# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 706# if __has_attribute(__type_visibility__) 707# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 708# else 709# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 710# endif 711# else 712# define _LIBCPP_TEMPLATE_VIS 713# endif 714#endif 715 716#ifndef _LIBCPP_TEMPLATE_DATA_VIS 717# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 718# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default"))) 719# else 720# define _LIBCPP_TEMPLATE_DATA_VIS 721# endif 722#endif 723 724#ifndef _LIBCPP_EXPORTED_FROM_ABI 725# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 726# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 727# else 728# define _LIBCPP_EXPORTED_FROM_ABI 729# endif 730#endif 731 732#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 733#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 734#endif 735 736#ifndef _LIBCPP_EXCEPTION_ABI 737# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 738# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 739# else 740# define _LIBCPP_EXCEPTION_ABI 741# endif 742#endif 743 744#ifndef _LIBCPP_ENUM_VIS 745# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 746# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 747# else 748# define _LIBCPP_ENUM_VIS 749# endif 750#endif 751 752#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 753# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 754# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 755# else 756# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 757# endif 758#endif 759 760#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 761#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 762#endif 763 764#if __has_attribute(internal_linkage) 765# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 766#else 767# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 768#endif 769 770#if __has_attribute(exclude_from_explicit_instantiation) 771# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 772#else 773 // Try to approximate the effect of exclude_from_explicit_instantiation 774 // (which is that entities are not assumed to be provided by explicit 775 // template instantiations in the dylib) by always inlining those entities. 776# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 777#endif 778 779#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 780# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 781# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 782# else 783# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 784# endif 785#endif 786 787#ifndef _LIBCPP_HIDE_FROM_ABI 788# if _LIBCPP_HIDE_FROM_ABI_PER_TU 789# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 790# else 791# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 792# endif 793#endif 794 795#ifdef _LIBCPP_BUILDING_LIBRARY 796# if _LIBCPP_ABI_VERSION > 1 797# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 798# else 799# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 800# endif 801#else 802# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 803#endif 804 805// Just so we can migrate to the new macros gradually. 806#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 807 808// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 809#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 810#define _LIBCPP_END_NAMESPACE_STD } } 811#define _VSTD std::_LIBCPP_ABI_NAMESPACE 812_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 813 814#if _LIBCPP_STD_VER >= 17 815#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 816 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 817#else 818#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 819 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 820#endif 821 822#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 823 _LIBCPP_END_NAMESPACE_STD } } 824 825#define _VSTD_FS _VSTD::__fs::filesystem 826 827#if __has_attribute(__enable_if__) 828# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 829#endif 830 831#ifndef _LIBCPP_HAS_NO_NOEXCEPT 832# define _NOEXCEPT noexcept 833# define _NOEXCEPT_(x) noexcept(x) 834#else 835# define _NOEXCEPT throw() 836# define _NOEXCEPT_(x) 837#endif 838 839#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 840typedef unsigned short char16_t; 841typedef unsigned int char32_t; 842#endif 843 844#ifndef __SIZEOF_INT128__ 845#define _LIBCPP_HAS_NO_INT128 846#endif 847 848#ifdef _LIBCPP_CXX03_LANG 849# define static_assert(...) _Static_assert(__VA_ARGS__) 850# define decltype(...) __decltype(__VA_ARGS__) 851#endif // _LIBCPP_CXX03_LANG 852 853#ifdef _LIBCPP_CXX03_LANG 854# define _LIBCPP_CONSTEXPR 855#else 856# define _LIBCPP_CONSTEXPR constexpr 857#endif 858 859#ifndef __cpp_consteval 860# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 861#else 862# define _LIBCPP_CONSTEVAL consteval 863#endif 864 865#if !defined(__cpp_concepts) || __cpp_concepts < 201907L 866#define _LIBCPP_HAS_NO_CONCEPTS 867#endif 868 869#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_HAS_NO_CONCEPTS) 870#define _LIBCPP_HAS_NO_RANGES 871#endif 872 873#ifdef __GNUC__ 874# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 875#else 876# define _LIBCPP_NOALIAS 877#endif 878 879#if __has_attribute(using_if_exists) 880# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 881#else 882# define _LIBCPP_USING_IF_EXISTS 883#endif 884 885#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS 886# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 887# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 888 __lx __v_; \ 889 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 890 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 891 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 892 }; 893#else // _LIBCPP_HAS_NO_STRONG_ENUMS 894# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 895# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 896#endif // _LIBCPP_HAS_NO_STRONG_ENUMS 897 898// _LIBCPP_DEBUG potential values: 899// - undefined: No assertions. This is the default. 900// - 0: Basic assertions 901// - 1: Basic assertions + iterator validity checks + unspecified behavior randomization. 902# if !defined(_LIBCPP_DEBUG) 903# define _LIBCPP_DEBUG_LEVEL 0 904# elif _LIBCPP_DEBUG == 0 905# define _LIBCPP_DEBUG_LEVEL 1 906# elif _LIBCPP_DEBUG == 1 907# define _LIBCPP_DEBUG_LEVEL 2 908# else 909# error Supported values for _LIBCPP_DEBUG are 0 and 1 910# endif 911 912# if _LIBCPP_DEBUG_LEVEL >= 2 && !defined(_LIBCPP_CXX03_LANG) 913# define _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY 914# endif 915 916# if defined(_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY) 917# if defined(_LIBCPP_CXX03_LANG) 918# error Support for unspecified stability is only for C++11 and higher 919# endif 920# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 921 do { \ 922 if (!__builtin_is_constant_evaluated()) \ 923 _VSTD::shuffle(__first, __last, __libcpp_debug_randomizer()); \ 924 } while (false) 925# else 926# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 927 do { \ 928 } while (false) 929# endif 930 931// Libc++ allows disabling extern template instantiation declarations by 932// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE. 933// 934// Furthermore, when the Debug mode is enabled, we disable extern declarations 935// when building user code because we don't want to use the functions compiled 936// in the library, which might not have had the debug mode enabled when built. 937// However, some extern declarations need to be used, because code correctness 938// depends on it (several instances in <locale>). Those special declarations 939// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled 940// even when the debug mode is enabled. 941#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE) 942# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 943# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */ 944#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY) 945# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 946# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 947#else 948# define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 949# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 950#endif 951 952#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 953 defined(__sun__) || defined(__NetBSD__) 954#define _LIBCPP_LOCALE__L_EXTENSIONS 1 955#endif 956 957#ifdef __FreeBSD__ 958#define _DECLARE_C99_LDBL_MATH 1 959#endif 960 961// If we are getting operator new from the MSVC CRT, then allocation overloads 962// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 963#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 964# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 965#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 966 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 967 // have it unless the language feature test macro is defined. 968# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 969#elif defined(__MVS__) 970# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 971#endif 972 973#if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 974 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 975# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 976#endif 977 978#if defined(__APPLE__) || defined(__FreeBSD__) 979#define _LIBCPP_HAS_DEFAULTRUNELOCALE 980#endif 981 982#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 983#define _LIBCPP_WCTYPE_IS_MASK 984#endif 985 986#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 987#define _LIBCPP_HAS_NO_CHAR8_T 988#endif 989 990// Deprecation macros. 991// 992// Deprecations warnings are always enabled, except when users explicitly opt-out 993// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 994#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 995# if __has_attribute(deprecated) 996# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 997# elif _LIBCPP_STD_VER > 11 998# define _LIBCPP_DEPRECATED [[deprecated]] 999# else 1000# define _LIBCPP_DEPRECATED 1001# endif 1002#else 1003# define _LIBCPP_DEPRECATED 1004#endif 1005 1006#if !defined(_LIBCPP_CXX03_LANG) 1007# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 1008#else 1009# define _LIBCPP_DEPRECATED_IN_CXX11 1010#endif 1011 1012#if _LIBCPP_STD_VER >= 14 1013# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 1014#else 1015# define _LIBCPP_DEPRECATED_IN_CXX14 1016#endif 1017 1018#if _LIBCPP_STD_VER >= 17 1019# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 1020#else 1021# define _LIBCPP_DEPRECATED_IN_CXX17 1022#endif 1023 1024#if _LIBCPP_STD_VER > 17 1025# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 1026#else 1027# define _LIBCPP_DEPRECATED_IN_CXX20 1028#endif 1029 1030#if !defined(_LIBCPP_HAS_NO_CHAR8_T) 1031# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 1032#else 1033# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 1034#endif 1035 1036// Macros to enter and leave a state where deprecation warnings are suppressed. 1037#if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 1038# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 1039 _Pragma("GCC diagnostic push") \ 1040 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 1041 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 1042# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 1043 _Pragma("GCC diagnostic pop") 1044#else 1045# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1046# define _LIBCPP_SUPPRESS_DEPRECATED_POP 1047#endif 1048 1049#if _LIBCPP_STD_VER <= 11 1050# define _LIBCPP_EXPLICIT_AFTER_CXX11 1051#else 1052# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 1053#endif 1054 1055#if _LIBCPP_STD_VER > 11 1056# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 1057#else 1058# define _LIBCPP_CONSTEXPR_AFTER_CXX11 1059#endif 1060 1061#if _LIBCPP_STD_VER > 14 1062# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 1063#else 1064# define _LIBCPP_CONSTEXPR_AFTER_CXX14 1065#endif 1066 1067#if _LIBCPP_STD_VER > 17 1068# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 1069#else 1070# define _LIBCPP_CONSTEXPR_AFTER_CXX17 1071#endif 1072 1073#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 1074# define _LIBCPP_NODISCARD [[nodiscard]] 1075#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 1076# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 1077#else 1078// We can't use GCC's [[gnu::warn_unused_result]] and 1079// __attribute__((warn_unused_result)), because GCC does not silence them via 1080// (void) cast. 1081# define _LIBCPP_NODISCARD 1082#endif 1083 1084// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1085// specified as such as an extension. 1086#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1087# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1088#else 1089# define _LIBCPP_NODISCARD_EXT 1090#endif 1091 1092#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 1093 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 1094# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1095#else 1096# define _LIBCPP_NODISCARD_AFTER_CXX17 1097#endif 1098 1099#if __has_attribute(no_destroy) 1100# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1101#else 1102# define _LIBCPP_NO_DESTROY 1103#endif 1104 1105#ifndef _LIBCPP_HAS_NO_ASAN 1106extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container( 1107 const void *, const void *, const void *, const void *); 1108#endif 1109 1110// Try to find out if RTTI is disabled. 1111#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) 1112# define _LIBCPP_NO_RTTI 1113#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1114# define _LIBCPP_NO_RTTI 1115#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1116# define _LIBCPP_NO_RTTI 1117#endif 1118 1119#ifndef _LIBCPP_WEAK 1120#define _LIBCPP_WEAK __attribute__((__weak__)) 1121#endif 1122 1123// Thread API 1124#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1125 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1126 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1127 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1128# if defined(__FreeBSD__) || \ 1129 defined(__wasi__) || \ 1130 defined(__NetBSD__) || \ 1131 defined(__OpenBSD__) || \ 1132 defined(__NuttX__) || \ 1133 defined(__linux__) || \ 1134 defined(__GNU__) || \ 1135 defined(__APPLE__) || \ 1136 defined(__sun__) || \ 1137 defined(__MVS__) || \ 1138 defined(_AIX) 1139# define _LIBCPP_HAS_THREAD_API_PTHREAD 1140# elif defined(__Fuchsia__) 1141 // TODO(44575): Switch to C11 thread API when possible. 1142# define _LIBCPP_HAS_THREAD_API_PTHREAD 1143# elif defined(_LIBCPP_WIN32API) 1144# define _LIBCPP_HAS_THREAD_API_WIN32 1145# else 1146# error "No thread API" 1147# endif // _LIBCPP_HAS_THREAD_API 1148#endif // _LIBCPP_HAS_NO_THREADS 1149 1150#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1151#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1152#define _LIBCPP_HAS_COND_CLOCKWAIT 1153#elif defined(_LIBCPP_GLIBC_PREREQ) 1154#if _LIBCPP_GLIBC_PREREQ(2, 30) 1155#define _LIBCPP_HAS_COND_CLOCKWAIT 1156#endif 1157#endif 1158#endif 1159 1160#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1161#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1162 _LIBCPP_HAS_NO_THREADS is not defined. 1163#endif 1164 1165#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1166#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1167 _LIBCPP_HAS_NO_THREADS is defined. 1168#endif 1169 1170#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1171#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1172 _LIBCPP_HAS_NO_THREADS is defined. 1173#endif 1174 1175#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1176#define __STDCPP_THREADS__ 1 1177#endif 1178 1179// The glibc and Bionic implementation of pthreads implements 1180// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1181// mutexes have no destroy mechanism. 1182// 1183// This optimization can't be performed on Apple platforms, where 1184// pthread_mutex_destroy can allow the kernel to release resources. 1185// See https://llvm.org/D64298 for details. 1186// 1187// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1188// respective stakeholders. 1189#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1190 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1191 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1192# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1193#endif 1194 1195// Destroying a condvar is a nop on Windows. 1196// 1197// This optimization can't be performed on Apple platforms, where 1198// pthread_cond_destroy can allow the kernel to release resources. 1199// See https://llvm.org/D64298 for details. 1200// 1201// TODO(EricWF): This is potentially true for some pthread implementations 1202// as well. 1203#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1204 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1205# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1206#endif 1207 1208// Some systems do not provide gets() in their C library, for security reasons. 1209#if defined(_LIBCPP_MSVCRT) || \ 1210 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \ 1211 defined(__OpenBSD__) 1212# define _LIBCPP_C_HAS_NO_GETS 1213#endif 1214 1215#if defined(__BIONIC__) || defined(__NuttX__) || \ 1216 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) || \ 1217 defined(__MVS__) || defined(__OpenBSD__) 1218#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1219#endif 1220 1221#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1222# define _LIBCPP_HAS_C_ATOMIC_IMP 1223#elif defined(_LIBCPP_COMPILER_GCC) 1224# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1225#endif 1226 1227#if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1228 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1229 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1230# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1231#else 1232# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1233# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1234# endif 1235# ifdef _LIBCPP_FREESTANDING 1236# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1237# endif 1238#endif 1239 1240#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1241#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1242#endif 1243 1244#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1245# if defined(__clang__) && __has_attribute(acquire_capability) 1246// Work around the attribute handling in clang. When both __declspec and 1247// __attribute__ are present, the processing goes awry preventing the definition 1248// of the types. 1249# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1250# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1251# endif 1252# endif 1253#endif 1254 1255#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1256# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1257#else 1258# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1259#endif 1260 1261#if __has_attribute(require_constant_initialization) 1262# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__)) 1263#else 1264# define _LIBCPP_SAFE_STATIC 1265#endif 1266 1267#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1268# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1269 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1270# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1271 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1272#else 1273# define _LIBCPP_DIAGNOSE_WARNING(...) 1274# define _LIBCPP_DIAGNOSE_ERROR(...) 1275#endif 1276 1277// Use a function like macro to imply that it must be followed by a semicolon 1278#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 1279# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1280#elif __has_cpp_attribute(clang::fallthrough) 1281# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1282#elif __has_attribute(__fallthrough__) 1283# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1284#else 1285# define _LIBCPP_FALLTHROUGH() ((void)0) 1286#endif 1287 1288#if __has_attribute(__nodebug__) 1289#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1290#else 1291#define _LIBCPP_NODEBUG 1292#endif 1293 1294#if __has_attribute(__standalone_debug__) 1295#define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1296#else 1297#define _LIBCPP_STANDALONE_DEBUG 1298#endif 1299 1300#if __has_attribute(__preferred_name__) 1301#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1302#else 1303#define _LIBCPP_PREFERRED_NAME(x) 1304#endif 1305 1306// We often repeat things just for handling wide characters in the library. 1307// When wide characters are disabled, it can be useful to have a quick way of 1308// disabling it without having to resort to #if-#endif, which has a larger 1309// impact on readability. 1310#if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1311# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1312#else 1313# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1314#endif 1315 1316#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1317 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1318# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1319#else 1320# define _LIBCPP_DECLSPEC_EMPTY_BASES 1321#endif 1322 1323#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1324#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1325#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1326#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1327#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1328#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1329 1330#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1331#define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1332#define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1333#define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1334#define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1335#define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1336#endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1337 1338#if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1339#define _LIBCPP_HAS_NO_CXX20_COROUTINES 1340#endif 1341 1342#if defined(_LIBCPP_COMPILER_IBM) 1343#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1344#endif 1345 1346#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1347# define _LIBCPP_PUSH_MACROS 1348# define _LIBCPP_POP_MACROS 1349#else 1350 // Don't warn about macro conflicts when we can restore them at the 1351 // end of the header. 1352# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1353# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1354# endif 1355# if defined(_LIBCPP_COMPILER_MSVC) 1356# define _LIBCPP_PUSH_MACROS \ 1357 __pragma(push_macro("min")) \ 1358 __pragma(push_macro("max")) 1359# define _LIBCPP_POP_MACROS \ 1360 __pragma(pop_macro("min")) \ 1361 __pragma(pop_macro("max")) 1362# else 1363# define _LIBCPP_PUSH_MACROS \ 1364 _Pragma("push_macro(\"min\")") \ 1365 _Pragma("push_macro(\"max\")") 1366# define _LIBCPP_POP_MACROS \ 1367 _Pragma("pop_macro(\"min\")") \ 1368 _Pragma("pop_macro(\"max\")") 1369# endif 1370#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1371 1372#ifndef _LIBCPP_NO_AUTO_LINK 1373# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1374# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1375# pragma comment(lib, "c++.lib") 1376# else 1377# pragma comment(lib, "libc++.lib") 1378# endif 1379# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1380#endif // _LIBCPP_NO_AUTO_LINK 1381 1382// Configures the fopen close-on-exec mode character, if any. This string will 1383// be appended to any mode string used by fstream for fopen/fdopen. 1384// 1385// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1386// do. 1387#if defined(__BIONIC__) 1388# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1389#else 1390# define _LIBCPP_FOPEN_CLOEXEC_MODE 1391#endif 1392 1393// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1394// of functions used in cstdio may not be available for low API levels when 1395// using 64-bit file offsets on LP32. 1396#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1397#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1398#endif 1399 1400#if __has_attribute(init_priority) 1401 // TODO: Remove this once we drop support for building libc++ with old Clangs 1402# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1403 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1404# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1405# else 1406# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1407# endif 1408#else 1409# define _LIBCPP_INIT_PRIORITY_MAX 1410#endif 1411 1412#if defined(__GNUC__) || defined(__clang__) 1413 // The attribute uses 1-based indices for ordinary and static member functions. 1414 // The attribute uses 2-based indices for non-static member functions. 1415# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1416 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1417#else 1418# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1419#endif 1420 1421#endif // __cplusplus 1422 1423#endif // _LIBCPP_CONFIG 1424