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#if defined(__OpenBSD__) 337 // Certain architectures provide arc4random(). Prefer using 338 // arc4random() over /dev/{u,}random to make it possible to obtain 339 // random data even when using sandboxing mechanisms such as chroots, 340 // Capsicum, etc. 341# define _LIBCPP_USING_ARC4_RANDOM 342#elif defined(__Fuchsia__) || defined(__wasi__) 343# define _LIBCPP_USING_GETENTROPY 344#elif defined(__native_client__) 345 // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 346 // including accesses to the special files under /dev. C++11's 347 // std::random_device is instead exposed through a NaCl syscall. 348# define _LIBCPP_USING_NACL_RANDOM 349#elif defined(_LIBCPP_WIN32API) 350# define _LIBCPP_USING_WIN32_RANDOM 351#else 352# define _LIBCPP_USING_DEV_RANDOM 353#endif 354 355#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 356# include <endian.h> 357# if __BYTE_ORDER == __LITTLE_ENDIAN 358# define _LIBCPP_LITTLE_ENDIAN 359# elif __BYTE_ORDER == __BIG_ENDIAN 360# define _LIBCPP_BIG_ENDIAN 361# else // __BYTE_ORDER == __BIG_ENDIAN 362# error unable to determine endian 363# endif 364#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 365 366#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 367# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 368#else 369# define _LIBCPP_NO_CFI 370#endif 371 372// If the compiler supports using_if_exists, pretend we have those functions and they'll 373// be picked up if the C library provides them. 374// 375// TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists 376// for platforms that don't have a conforming C11 library, so we can drop this whole thing. 377#if __has_attribute(using_if_exists) 378# define _LIBCPP_HAS_TIMESPEC_GET 379# define _LIBCPP_HAS_QUICK_EXIT 380# define _LIBCPP_HAS_ALIGNED_ALLOC 381#else 382#if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L 383# if defined(__FreeBSD__) 384# define _LIBCPP_HAS_ALIGNED_ALLOC 385# define _LIBCPP_HAS_QUICK_EXIT 386# if __FreeBSD_version >= 1300064 || \ 387 (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000) 388# define _LIBCPP_HAS_TIMESPEC_GET 389# endif 390# elif defined(__BIONIC__) 391# if __ANDROID_API__ >= 21 392# define _LIBCPP_HAS_QUICK_EXIT 393# endif 394# if __ANDROID_API__ >= 28 395# define _LIBCPP_HAS_ALIGNED_ALLOC 396# endif 397# if __ANDROID_API__ >= 29 398# define _LIBCPP_HAS_TIMESPEC_GET 399# endif 400# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__) 401# define _LIBCPP_HAS_ALIGNED_ALLOC 402# define _LIBCPP_HAS_QUICK_EXIT 403# define _LIBCPP_HAS_TIMESPEC_GET 404# elif defined(__OpenBSD__) 405# define _LIBCPP_HAS_ALIGNED_ALLOC 406# define _LIBCPP_HAS_TIMESPEC_GET 407# elif defined(__linux__) 408# if !defined(_LIBCPP_HAS_MUSL_LIBC) 409# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__) 410# define _LIBCPP_HAS_QUICK_EXIT 411# endif 412# if _LIBCPP_GLIBC_PREREQ(2, 17) 413# define _LIBCPP_HAS_ALIGNED_ALLOC 414# define _LIBCPP_HAS_TIMESPEC_GET 415# endif 416# else // defined(_LIBCPP_HAS_MUSL_LIBC) 417# define _LIBCPP_HAS_ALIGNED_ALLOC 418# define _LIBCPP_HAS_QUICK_EXIT 419# define _LIBCPP_HAS_TIMESPEC_GET 420# endif 421# elif defined(_LIBCPP_MSVCRT) 422 // Using Microsoft's C Runtime library, not MinGW 423# define _LIBCPP_HAS_TIMESPEC_GET 424# elif defined(__APPLE__) 425 // timespec_get and aligned_alloc were introduced in macOS 10.15 and 426 // aligned releases 427# if ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500) || \ 428 (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ 429 (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ 430 (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000)) 431# define _LIBCPP_HAS_ALIGNED_ALLOC 432# define _LIBCPP_HAS_TIMESPEC_GET 433# endif 434# endif // __APPLE__ 435#endif 436#endif // __has_attribute(using_if_exists) 437 438#ifndef _LIBCPP_CXX03_LANG 439# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 440#elif defined(_LIBCPP_COMPILER_CLANG_BASED) 441# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 442#else 443# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 444#endif 445 446#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 447 448#if defined(_LIBCPP_COMPILER_CLANG_BASED) 449 450#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT) 451# error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead 452#endif 453#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 454 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 455# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 456#endif 457 458#if __has_feature(cxx_alignas) 459# define _ALIGNAS_TYPE(x) alignas(x) 460# define _ALIGNAS(x) alignas(x) 461#else 462# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 463# define _ALIGNAS(x) __attribute__((__aligned__(x))) 464#endif 465 466#if __cplusplus < 201103L 467typedef __char16_t char16_t; 468typedef __char32_t char32_t; 469#endif 470 471#if !__has_feature(cxx_exceptions) 472# define _LIBCPP_NO_EXCEPTIONS 473#endif 474 475#if !(__has_feature(cxx_strong_enums)) 476#define _LIBCPP_HAS_NO_STRONG_ENUMS 477#endif 478 479#if __has_feature(cxx_attributes) 480# define _LIBCPP_NORETURN [[noreturn]] 481#else 482# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 483#endif 484 485#if !(__has_feature(cxx_nullptr)) 486# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR) 487# define nullptr __nullptr 488# else 489# define _LIBCPP_HAS_NO_NULLPTR 490# endif 491#endif 492 493// Objective-C++ features (opt-in) 494#if __has_feature(objc_arc) 495#define _LIBCPP_HAS_OBJC_ARC 496#endif 497 498#if __has_feature(objc_arc_weak) 499#define _LIBCPP_HAS_OBJC_ARC_WEAK 500#endif 501 502#if __has_extension(blocks) 503# define _LIBCPP_HAS_EXTENSION_BLOCKS 504#endif 505 506#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 507# define _LIBCPP_HAS_BLOCKS_RUNTIME 508#endif 509 510#if !(__has_feature(cxx_noexcept)) 511#define _LIBCPP_HAS_NO_NOEXCEPT 512#endif 513 514#if !__has_feature(address_sanitizer) 515#define _LIBCPP_HAS_NO_ASAN 516#endif 517 518// Allow for build-time disabling of unsigned integer sanitization 519#if __has_attribute(no_sanitize) 520#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 521#endif 522 523#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 524 525#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 526 527#elif defined(_LIBCPP_COMPILER_GCC) 528 529#define _ALIGNAS(x) __attribute__((__aligned__(x))) 530#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 531 532#define _LIBCPP_NORETURN __attribute__((noreturn)) 533 534#if !defined(__EXCEPTIONS) 535# define _LIBCPP_NO_EXCEPTIONS 536#endif 537 538#if !defined(__SANITIZE_ADDRESS__) 539#define _LIBCPP_HAS_NO_ASAN 540#endif 541 542#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 543 544#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 545 546#elif defined(_LIBCPP_COMPILER_MSVC) 547 548#define _LIBCPP_TOSTRING2(x) #x 549#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 550#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 551 552#if _MSC_VER < 1900 553#error "MSVC versions prior to Visual Studio 2015 are not supported" 554#endif 555 556#define __alignof__ __alignof 557#define _LIBCPP_NORETURN __declspec(noreturn) 558#define _ALIGNAS(x) __declspec(align(x)) 559#define _ALIGNAS_TYPE(x) alignas(x) 560 561#define _LIBCPP_WEAK 562 563#define _LIBCPP_HAS_NO_ASAN 564 565#define _LIBCPP_ALWAYS_INLINE __forceinline 566 567#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 568 569#define _LIBCPP_DISABLE_EXTENSION_WARNING 570 571#elif defined(_LIBCPP_COMPILER_IBM) 572 573#define _ALIGNAS(x) __attribute__((__aligned__(x))) 574#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 575#define _ATTRIBUTE(x) __attribute__((x)) 576#define _LIBCPP_NORETURN __attribute__((noreturn)) 577 578#define _LIBCPP_HAS_NO_UNICODE_CHARS 579 580#if defined(_AIX) 581#define __MULTILOCALE_API 582#endif 583 584#define _LIBCPP_HAS_NO_ASAN 585 586#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 587 588#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 589 590#define _LIBCPP_DISABLE_EXTENSION_WARNING 591 592#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 593 594#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 595 596#ifdef _DLL 597# define _LIBCPP_CRT_FUNC __declspec(dllimport) 598#else 599# define _LIBCPP_CRT_FUNC 600#endif 601 602#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 603# define _LIBCPP_DLL_VIS 604# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 605# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 606# define _LIBCPP_OVERRIDABLE_FUNC_VIS 607# define _LIBCPP_EXPORTED_FROM_ABI 608#elif defined(_LIBCPP_BUILDING_LIBRARY) 609# define _LIBCPP_DLL_VIS __declspec(dllexport) 610# if defined(__MINGW32__) 611# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 612# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 613# else 614# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 615# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 616# endif 617# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 618# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 619#else 620# define _LIBCPP_DLL_VIS __declspec(dllimport) 621# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 622# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 623# define _LIBCPP_OVERRIDABLE_FUNC_VIS 624# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 625#endif 626 627#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 628#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 629#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 630#define _LIBCPP_HIDDEN 631#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 632#define _LIBCPP_TEMPLATE_VIS 633#define _LIBCPP_TEMPLATE_DATA_VIS 634#define _LIBCPP_ENUM_VIS 635 636#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 637 638#ifndef _LIBCPP_HIDDEN 639# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 640# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 641# else 642# define _LIBCPP_HIDDEN 643# endif 644#endif 645 646#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 647# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 648// The inline should be removed once PR32114 is resolved 649# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 650# else 651# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 652# endif 653#endif 654 655#ifndef _LIBCPP_FUNC_VIS 656# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 657# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 658# else 659# define _LIBCPP_FUNC_VIS 660# endif 661#endif 662 663#ifndef _LIBCPP_TYPE_VIS 664# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 665# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 666# else 667# define _LIBCPP_TYPE_VIS 668# endif 669#endif 670 671#ifndef _LIBCPP_TEMPLATE_VIS 672# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 673# if __has_attribute(__type_visibility__) 674# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 675# else 676# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 677# endif 678# else 679# define _LIBCPP_TEMPLATE_VIS 680# endif 681#endif 682 683#ifndef _LIBCPP_TEMPLATE_DATA_VIS 684# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 685# define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default"))) 686# else 687# define _LIBCPP_TEMPLATE_DATA_VIS 688# endif 689#endif 690 691#ifndef _LIBCPP_EXPORTED_FROM_ABI 692# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 693# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 694# else 695# define _LIBCPP_EXPORTED_FROM_ABI 696# endif 697#endif 698 699#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 700#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 701#endif 702 703#ifndef _LIBCPP_EXCEPTION_ABI 704# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 705# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 706# else 707# define _LIBCPP_EXCEPTION_ABI 708# endif 709#endif 710 711#ifndef _LIBCPP_ENUM_VIS 712# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 713# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 714# else 715# define _LIBCPP_ENUM_VIS 716# endif 717#endif 718 719#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 720# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 721# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 722# else 723# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 724# endif 725#endif 726 727#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 728#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 729#endif 730 731#if __has_attribute(internal_linkage) 732# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 733#else 734# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 735#endif 736 737#if __has_attribute(exclude_from_explicit_instantiation) 738# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 739#else 740 // Try to approximate the effect of exclude_from_explicit_instantiation 741 // (which is that entities are not assumed to be provided by explicit 742 // template instantiations in the dylib) by always inlining those entities. 743# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 744#endif 745 746#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 747# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 748# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 749# else 750# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 751# endif 752#endif 753 754#ifndef _LIBCPP_HIDE_FROM_ABI 755# if _LIBCPP_HIDE_FROM_ABI_PER_TU 756# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 757# else 758# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 759# endif 760#endif 761 762#ifdef _LIBCPP_BUILDING_LIBRARY 763# if _LIBCPP_ABI_VERSION > 1 764# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 765# else 766# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 767# endif 768#else 769# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 770#endif 771 772// Just so we can migrate to the new macros gradually. 773#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 774 775// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 776#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 777#define _LIBCPP_END_NAMESPACE_STD } } 778#define _VSTD std::_LIBCPP_ABI_NAMESPACE 779_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 780 781#if _LIBCPP_STD_VER >= 17 782#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 783 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 784#else 785#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 786 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 787#endif 788 789#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 790 _LIBCPP_END_NAMESPACE_STD } } 791 792#define _VSTD_FS _VSTD::__fs::filesystem 793 794#if __has_attribute(__enable_if__) 795# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 796#endif 797 798#ifndef _LIBCPP_HAS_NO_NOEXCEPT 799# define _NOEXCEPT noexcept 800# define _NOEXCEPT_(x) noexcept(x) 801#else 802# define _NOEXCEPT throw() 803# define _NOEXCEPT_(x) 804#endif 805 806#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 807typedef unsigned short char16_t; 808typedef unsigned int char32_t; 809#endif 810 811#ifndef __SIZEOF_INT128__ 812#define _LIBCPP_HAS_NO_INT128 813#endif 814 815#ifdef _LIBCPP_CXX03_LANG 816# define static_assert(...) _Static_assert(__VA_ARGS__) 817# define decltype(...) __decltype(__VA_ARGS__) 818#endif // _LIBCPP_CXX03_LANG 819 820#ifdef _LIBCPP_CXX03_LANG 821# define _LIBCPP_CONSTEXPR 822#else 823# define _LIBCPP_CONSTEXPR constexpr 824#endif 825 826#ifndef __cpp_consteval 827# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 828#else 829# define _LIBCPP_CONSTEVAL consteval 830#endif 831 832#if !defined(__cpp_concepts) || __cpp_concepts < 201907L 833#define _LIBCPP_HAS_NO_CONCEPTS 834#endif 835 836#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_HAS_NO_CONCEPTS) 837#define _LIBCPP_HAS_NO_RANGES 838#endif 839 840#ifdef __GNUC__ 841# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 842#else 843# define _LIBCPP_NOALIAS 844#endif 845 846#if __has_attribute(using_if_exists) 847# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) 848#else 849# define _LIBCPP_USING_IF_EXISTS 850#endif 851 852#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS 853# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 854# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 855 __lx __v_; \ 856 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 857 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 858 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 859 }; 860#else // _LIBCPP_HAS_NO_STRONG_ENUMS 861# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 862# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 863#endif // _LIBCPP_HAS_NO_STRONG_ENUMS 864 865// _LIBCPP_DEBUG potential values: 866// - undefined: No assertions. This is the default. 867// - 0: Basic assertions 868// - 1: Basic assertions + iterator validity checks + unspecified behavior randomization. 869# if !defined(_LIBCPP_DEBUG) 870# define _LIBCPP_DEBUG_LEVEL 0 871# elif _LIBCPP_DEBUG == 0 872# define _LIBCPP_DEBUG_LEVEL 1 873# elif _LIBCPP_DEBUG == 1 874# define _LIBCPP_DEBUG_LEVEL 2 875# else 876# error Supported values for _LIBCPP_DEBUG are 0 and 1 877# endif 878 879# if _LIBCPP_DEBUG_LEVEL >= 2 && !defined(_LIBCPP_CXX03_LANG) 880# define _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY 881# endif 882 883# if defined(_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY) 884# if defined(_LIBCPP_CXX03_LANG) 885# error Support for unspecified stability is only for C++11 and higher 886# endif 887# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 888 do { \ 889 if (!__builtin_is_constant_evaluated()) \ 890 _VSTD::shuffle(__first, __last, __libcpp_debug_randomizer()); \ 891 } while (false) 892# else 893# define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ 894 do { \ 895 } while (false) 896# endif 897 898// Libc++ allows disabling extern template instantiation declarations by 899// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE. 900// 901// Furthermore, when the Debug mode is enabled, we disable extern declarations 902// when building user code because we don't want to use the functions compiled 903// in the library, which might not have had the debug mode enabled when built. 904// However, some extern declarations need to be used, because code correctness 905// depends on it (several instances in <locale>). Those special declarations 906// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled 907// even when the debug mode is enabled. 908#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE) 909# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 910# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */ 911#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY) 912# define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ 913# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 914#else 915# define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 916# define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; 917#endif 918 919#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 920 defined(__sun__) || defined(__NetBSD__) 921#define _LIBCPP_LOCALE__L_EXTENSIONS 1 922#endif 923 924#ifdef __FreeBSD__ 925#define _DECLARE_C99_LDBL_MATH 1 926#endif 927 928// If we are getting operator new from the MSVC CRT, then allocation overloads 929// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 930#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 931# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 932#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 933 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 934 // have it unless the language feature test macro is defined. 935# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 936#elif defined(__MVS__) 937# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 938#endif 939 940#if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 941 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) 942# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 943#endif 944 945#if defined(__APPLE__) || defined(__FreeBSD__) 946#define _LIBCPP_HAS_DEFAULTRUNELOCALE 947#endif 948 949#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 950#define _LIBCPP_WCTYPE_IS_MASK 951#endif 952 953#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 954#define _LIBCPP_HAS_NO_CHAR8_T 955#endif 956 957// Deprecation macros. 958// 959// Deprecations warnings are always enabled, except when users explicitly opt-out 960// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 961#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 962# if __has_attribute(deprecated) 963# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 964# elif _LIBCPP_STD_VER > 11 965# define _LIBCPP_DEPRECATED [[deprecated]] 966# else 967# define _LIBCPP_DEPRECATED 968# endif 969#else 970# define _LIBCPP_DEPRECATED 971#endif 972 973#if !defined(_LIBCPP_CXX03_LANG) 974# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 975#else 976# define _LIBCPP_DEPRECATED_IN_CXX11 977#endif 978 979#if _LIBCPP_STD_VER >= 14 980# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 981#else 982# define _LIBCPP_DEPRECATED_IN_CXX14 983#endif 984 985#if _LIBCPP_STD_VER >= 17 986# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 987#else 988# define _LIBCPP_DEPRECATED_IN_CXX17 989#endif 990 991#if _LIBCPP_STD_VER > 17 992# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 993#else 994# define _LIBCPP_DEPRECATED_IN_CXX20 995#endif 996 997#if !defined(_LIBCPP_HAS_NO_CHAR8_T) 998# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 999#else 1000# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 1001#endif 1002 1003// Macros to enter and leave a state where deprecation warnings are suppressed. 1004#if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) 1005# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 1006 _Pragma("GCC diagnostic push") \ 1007 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ 1008 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") 1009# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 1010 _Pragma("GCC diagnostic pop") 1011#else 1012# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1013# define _LIBCPP_SUPPRESS_DEPRECATED_POP 1014#endif 1015 1016#if _LIBCPP_STD_VER <= 11 1017# define _LIBCPP_EXPLICIT_AFTER_CXX11 1018#else 1019# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 1020#endif 1021 1022#if _LIBCPP_STD_VER > 11 1023# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 1024#else 1025# define _LIBCPP_CONSTEXPR_AFTER_CXX11 1026#endif 1027 1028#if _LIBCPP_STD_VER > 14 1029# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 1030#else 1031# define _LIBCPP_CONSTEXPR_AFTER_CXX14 1032#endif 1033 1034#if _LIBCPP_STD_VER > 17 1035# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 1036#else 1037# define _LIBCPP_CONSTEXPR_AFTER_CXX17 1038#endif 1039 1040#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 1041# define _LIBCPP_NODISCARD [[nodiscard]] 1042#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) 1043# define _LIBCPP_NODISCARD [[clang::warn_unused_result]] 1044#else 1045// We can't use GCC's [[gnu::warn_unused_result]] and 1046// __attribute__((warn_unused_result)), because GCC does not silence them via 1047// (void) cast. 1048# define _LIBCPP_NODISCARD 1049#endif 1050 1051// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1052// specified as such as an extension. 1053#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1054# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD 1055#else 1056# define _LIBCPP_NODISCARD_EXT 1057#endif 1058 1059#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 1060 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 1061# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD 1062#else 1063# define _LIBCPP_NODISCARD_AFTER_CXX17 1064#endif 1065 1066#if __has_attribute(no_destroy) 1067# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1068#else 1069# define _LIBCPP_NO_DESTROY 1070#endif 1071 1072#ifndef _LIBCPP_HAS_NO_ASAN 1073extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container( 1074 const void *, const void *, const void *, const void *); 1075#endif 1076 1077// Try to find out if RTTI is disabled. 1078#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) 1079# define _LIBCPP_NO_RTTI 1080#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1081# define _LIBCPP_NO_RTTI 1082#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1083# define _LIBCPP_NO_RTTI 1084#endif 1085 1086#ifndef _LIBCPP_WEAK 1087#define _LIBCPP_WEAK __attribute__((__weak__)) 1088#endif 1089 1090// Thread API 1091#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1092 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1093 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1094 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1095# if defined(__FreeBSD__) || \ 1096 defined(__wasi__) || \ 1097 defined(__NetBSD__) || \ 1098 defined(__OpenBSD__) || \ 1099 defined(__NuttX__) || \ 1100 defined(__linux__) || \ 1101 defined(__GNU__) || \ 1102 defined(__APPLE__) || \ 1103 defined(__sun__) || \ 1104 defined(__MVS__) || \ 1105 defined(_AIX) 1106# define _LIBCPP_HAS_THREAD_API_PTHREAD 1107# elif defined(__Fuchsia__) 1108 // TODO(44575): Switch to C11 thread API when possible. 1109# define _LIBCPP_HAS_THREAD_API_PTHREAD 1110# elif defined(_LIBCPP_WIN32API) 1111# define _LIBCPP_HAS_THREAD_API_WIN32 1112# else 1113# error "No thread API" 1114# endif // _LIBCPP_HAS_THREAD_API 1115#endif // _LIBCPP_HAS_NO_THREADS 1116 1117#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1118#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1119#define _LIBCPP_HAS_COND_CLOCKWAIT 1120#elif defined(_LIBCPP_GLIBC_PREREQ) 1121#if _LIBCPP_GLIBC_PREREQ(2, 30) 1122#define _LIBCPP_HAS_COND_CLOCKWAIT 1123#endif 1124#endif 1125#endif 1126 1127#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1128#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1129 _LIBCPP_HAS_NO_THREADS is not defined. 1130#endif 1131 1132#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1133#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1134 _LIBCPP_HAS_NO_THREADS is defined. 1135#endif 1136 1137#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1138#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1139 _LIBCPP_HAS_NO_THREADS is defined. 1140#endif 1141 1142#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1143#define __STDCPP_THREADS__ 1 1144#endif 1145 1146// The glibc and Bionic implementation of pthreads implements 1147// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1148// mutexes have no destroy mechanism. 1149// 1150// This optimization can't be performed on Apple platforms, where 1151// pthread_mutex_destroy can allow the kernel to release resources. 1152// See https://llvm.org/D64298 for details. 1153// 1154// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1155// respective stakeholders. 1156#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1157 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1158 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1159# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1160#endif 1161 1162// Destroying a condvar is a nop on Windows. 1163// 1164// This optimization can't be performed on Apple platforms, where 1165// pthread_cond_destroy can allow the kernel to release resources. 1166// See https://llvm.org/D64298 for details. 1167// 1168// TODO(EricWF): This is potentially true for some pthread implementations 1169// as well. 1170#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1171 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1172# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1173#endif 1174 1175// Some systems do not provide gets() in their C library, for security reasons. 1176#if defined(_LIBCPP_MSVCRT) || \ 1177 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \ 1178 defined(__OpenBSD__) 1179# define _LIBCPP_C_HAS_NO_GETS 1180#endif 1181 1182#if defined(__BIONIC__) || defined(__NuttX__) || \ 1183 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) || \ 1184 defined(__MVS__) || defined(__OpenBSD__) 1185#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1186#endif 1187 1188#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1189# define _LIBCPP_HAS_C_ATOMIC_IMP 1190#elif defined(_LIBCPP_COMPILER_GCC) 1191# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1192#endif 1193 1194#if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1195 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1196 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) 1197# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1198#else 1199# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1200# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1201# endif 1202# ifdef _LIBCPP_FREESTANDING 1203# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1204# endif 1205#endif 1206 1207#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1208#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1209#endif 1210 1211#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1212# if defined(__clang__) && __has_attribute(acquire_capability) 1213// Work around the attribute handling in clang. When both __declspec and 1214// __attribute__ are present, the processing goes awry preventing the definition 1215// of the types. 1216# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1217# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1218# endif 1219# endif 1220#endif 1221 1222#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1223# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1224#else 1225# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1226#endif 1227 1228#if __has_attribute(require_constant_initialization) 1229# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__)) 1230#else 1231# define _LIBCPP_SAFE_STATIC 1232#endif 1233 1234#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1235# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1236 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1237# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1238 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1239#else 1240# define _LIBCPP_DIAGNOSE_WARNING(...) 1241# define _LIBCPP_DIAGNOSE_ERROR(...) 1242#endif 1243 1244// Use a function like macro to imply that it must be followed by a semicolon 1245#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 1246# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1247#elif __has_cpp_attribute(clang::fallthrough) 1248# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1249#elif __has_attribute(__fallthrough__) 1250# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1251#else 1252# define _LIBCPP_FALLTHROUGH() ((void)0) 1253#endif 1254 1255#if __has_attribute(__nodebug__) 1256#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1257#else 1258#define _LIBCPP_NODEBUG 1259#endif 1260 1261#if __has_attribute(__standalone_debug__) 1262#define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) 1263#else 1264#define _LIBCPP_STANDALONE_DEBUG 1265#endif 1266 1267#if __has_attribute(__preferred_name__) 1268#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) 1269#else 1270#define _LIBCPP_PREFERRED_NAME(x) 1271#endif 1272 1273// We often repeat things just for handling wide characters in the library. 1274// When wide characters are disabled, it can be useful to have a quick way of 1275// disabling it without having to resort to #if-#endif, which has a larger 1276// impact on readability. 1277#if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) 1278# define _LIBCPP_IF_WIDE_CHARACTERS(...) 1279#else 1280# define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ 1281#endif 1282 1283#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1284 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1285# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1286#else 1287# define _LIBCPP_DECLSPEC_EMPTY_BASES 1288#endif 1289 1290#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1291#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1292#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1293#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1294#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1295#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1296 1297#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) 1298#define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS 1299#define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS 1300#define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS 1301#define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR 1302#define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS 1303#endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES 1304 1305#if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L 1306#define _LIBCPP_HAS_NO_CXX20_COROUTINES 1307#endif 1308 1309#if defined(_LIBCPP_COMPILER_IBM) 1310#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1311#endif 1312 1313#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1314# define _LIBCPP_PUSH_MACROS 1315# define _LIBCPP_POP_MACROS 1316#else 1317 // Don't warn about macro conflicts when we can restore them at the 1318 // end of the header. 1319# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1320# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1321# endif 1322# if defined(_LIBCPP_COMPILER_MSVC) 1323# define _LIBCPP_PUSH_MACROS \ 1324 __pragma(push_macro("min")) \ 1325 __pragma(push_macro("max")) 1326# define _LIBCPP_POP_MACROS \ 1327 __pragma(pop_macro("min")) \ 1328 __pragma(pop_macro("max")) 1329# else 1330# define _LIBCPP_PUSH_MACROS \ 1331 _Pragma("push_macro(\"min\")") \ 1332 _Pragma("push_macro(\"max\")") 1333# define _LIBCPP_POP_MACROS \ 1334 _Pragma("pop_macro(\"min\")") \ 1335 _Pragma("pop_macro(\"max\")") 1336# endif 1337#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1338 1339#ifndef _LIBCPP_NO_AUTO_LINK 1340# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1341# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 1342# pragma comment(lib, "c++.lib") 1343# else 1344# pragma comment(lib, "libc++.lib") 1345# endif 1346# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1347#endif // _LIBCPP_NO_AUTO_LINK 1348 1349// Configures the fopen close-on-exec mode character, if any. This string will 1350// be appended to any mode string used by fstream for fopen/fdopen. 1351// 1352// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1353// do. 1354#if defined(__BIONIC__) 1355# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1356#else 1357# define _LIBCPP_FOPEN_CLOEXEC_MODE 1358#endif 1359 1360// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1361// of functions used in cstdio may not be available for low API levels when 1362// using 64-bit file offsets on LP32. 1363#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1364#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1365#endif 1366 1367#if __has_attribute(init_priority) 1368 // TODO: Remove this once we drop support for building libc++ with old Clangs 1369# if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ 1370 (defined(__apple_build_version__) && __apple_build_version__ < 13000000) 1371# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1372# else 1373# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) 1374# endif 1375#else 1376# define _LIBCPP_INIT_PRIORITY_MAX 1377#endif 1378 1379#if defined(__GNUC__) || defined(__clang__) 1380 // The attribute uses 1-based indices for ordinary and static member functions. 1381 // The attribute uses 2-based indices for non-static member functions. 1382# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ 1383 __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) 1384#else 1385# define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ 1386#endif 1387 1388#endif // __cplusplus 1389 1390#endif // _LIBCPP_CONFIG 1391