1// -*- C++ -*- 2//===--------------------------- __config ---------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_CONFIG 11#define _LIBCPP_CONFIG 12 13#if defined(_MSC_VER) && !defined(__clang__) 14# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 16# endif 17#endif 18 19#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER 20#pragma GCC system_header 21#endif 22 23#ifdef __cplusplus 24 25#ifdef __GNUC__ 26# define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__) 27// The _GNUC_VER_NEW macro better represents the new GCC versioning scheme 28// introduced in GCC 5.0. 29# define _GNUC_VER_NEW (_GNUC_VER * 10 + __GNUC_PATCHLEVEL__) 30#else 31# define _GNUC_VER 0 32# define _GNUC_VER_NEW 0 33#endif 34 35#define _LIBCPP_VERSION 12000 36 37#ifndef _LIBCPP_ABI_VERSION 38# define _LIBCPP_ABI_VERSION 1 39#endif 40 41#if __STDC_HOSTED__ == 0 42# define _LIBCPP_FREESTANDING 43#endif 44 45#ifndef _LIBCPP_STD_VER 46# if __cplusplus <= 201103L 47# define _LIBCPP_STD_VER 11 48# elif __cplusplus <= 201402L 49# define _LIBCPP_STD_VER 14 50# elif __cplusplus <= 201703L 51# define _LIBCPP_STD_VER 17 52# else 53# define _LIBCPP_STD_VER 18 // current year, or date of c++2a ratification 54# endif 55#endif // _LIBCPP_STD_VER 56 57#if defined(__ELF__) 58# define _LIBCPP_OBJECT_FORMAT_ELF 1 59#elif defined(__MACH__) 60# define _LIBCPP_OBJECT_FORMAT_MACHO 1 61#elif defined(_WIN32) 62# define _LIBCPP_OBJECT_FORMAT_COFF 1 63#elif defined(__wasm__) 64# define _LIBCPP_OBJECT_FORMAT_WASM 1 65#else 66 // ... add new file formats here ... 67#endif 68 69#if defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2 70// Change short string representation so that string data starts at offset 0, 71// improving its alignment in some cases. 72# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 73// Fix deque iterator type in order to support incomplete types. 74# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE 75// Fix undefined behavior in how std::list stores its linked nodes. 76# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB 77// Fix undefined behavior in how __tree stores its end and parent nodes. 78# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB 79// Fix undefined behavior in how __hash_table stores its pointer types. 80# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB 81# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB 82# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE 83// Don't use a nullptr_t simulation type in C++03 instead using C++11 nullptr 84// provided under the alternate keyword __nullptr, which changes the mangling 85// of nullptr_t. This option is ABI incompatible with GCC in C++03 mode. 86# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR 87// Define the `pointer_safety` enum as a C++11 strongly typed enumeration 88// instead of as a class simulating an enum. If this option is enabled 89// `pointer_safety` and `get_pointer_safety()` will no longer be available 90// in C++03. 91# define _LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE 92// Define a key function for `bad_function_call` in the library, to centralize 93// its vtable and typeinfo to libc++ rather than having all other libraries 94// using that class define their own copies. 95# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 96// Enable optimized version of __do_get_(un)signed which avoids redundant copies. 97# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET 98// Use the smallest possible integer type to represent the index of the variant. 99// Previously libc++ used "unsigned int" exclusively. 100# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION 101// Unstable attempt to provide a more optimized std::function 102# define _LIBCPP_ABI_OPTIMIZED_FUNCTION 103// All the regex constants must be distinct and nonzero. 104# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO 105// Re-worked external template instantiations for std::string with a focus on 106// performance and fast-path inlining. 107# define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION 108// Enable clang::trivial_abi on std::unique_ptr. 109# define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI 110// Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr 111# define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI 112#elif _LIBCPP_ABI_VERSION == 1 113# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 114// Enable compiling copies of now inline methods into the dylib to support 115// applications compiled against older libraries. This is unnecessary with 116// COFF dllexport semantics, since dllexport forces a non-inline definition 117// of inline functions to be emitted anyway. Our own non-inline copy would 118// conflict with the dllexport-emitted copy, so we disable it. 119# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS 120# endif 121// Feature macros for disabling pre ABI v1 features. All of these options 122// are deprecated. 123# if defined(__FreeBSD__) 124# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR 125# endif 126#endif 127 128#if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2 129// Enable additional explicit instantiations of iostreams components. This 130// reduces the number of weak definitions generated in programs that use 131// iostreams by providing a single strong definition in the shared library. 132# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 133#endif 134 135#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y 136#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) 137 138#ifndef _LIBCPP_ABI_NAMESPACE 139# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION) 140#endif 141 142#if __cplusplus < 201103L 143#define _LIBCPP_CXX03_LANG 144#endif 145 146#ifndef __has_attribute 147#define __has_attribute(__x) 0 148#endif 149 150#ifndef __has_builtin 151#define __has_builtin(__x) 0 152#endif 153 154#ifndef __has_extension 155#define __has_extension(__x) 0 156#endif 157 158#ifndef __has_feature 159#define __has_feature(__x) 0 160#endif 161 162#ifndef __has_cpp_attribute 163#define __has_cpp_attribute(__x) 0 164#endif 165 166// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by 167// the compiler and '1' otherwise. 168#ifndef __is_identifier 169#define __is_identifier(__x) 1 170#endif 171 172#ifndef __has_declspec_attribute 173#define __has_declspec_attribute(__x) 0 174#endif 175 176#define __has_keyword(__x) !(__is_identifier(__x)) 177 178#ifndef __has_include 179#define __has_include(...) 0 180#endif 181 182#if defined(__clang__) 183# define _LIBCPP_COMPILER_CLANG 184# ifndef __apple_build_version__ 185# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) 186# endif 187#elif defined(__GNUC__) 188# define _LIBCPP_COMPILER_GCC 189#elif defined(_MSC_VER) 190# define _LIBCPP_COMPILER_MSVC 191#elif defined(__IBMCPP__) 192# define _LIBCPP_COMPILER_IBM 193#endif 194 195#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L 196#error "libc++ does not support using GCC with C++03. Please enable C++11" 197#endif 198 199// FIXME: ABI detection should be done via compiler builtin macros. This 200// is just a placeholder until Clang implements such macros. For now assume 201// that Windows compilers pretending to be MSVC++ target the Microsoft ABI, 202// and allow the user to explicitly specify the ABI to handle cases where this 203// heuristic falls short. 204#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) 205# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" 206#elif defined(_LIBCPP_ABI_FORCE_ITANIUM) 207# define _LIBCPP_ABI_ITANIUM 208#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) 209# define _LIBCPP_ABI_MICROSOFT 210#else 211# if defined(_WIN32) && defined(_MSC_VER) 212# define _LIBCPP_ABI_MICROSOFT 213# else 214# define _LIBCPP_ABI_ITANIUM 215# endif 216#endif 217 218#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) 219# define _LIBCPP_ABI_VCRUNTIME 220#endif 221 222// Need to detect which libc we're using if we're on Linux. 223#if defined(__linux__) 224# include <features.h> 225# if defined(__GLIBC_PREREQ) 226# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) 227# else 228# define _LIBCPP_GLIBC_PREREQ(a, b) 0 229# endif // defined(__GLIBC_PREREQ) 230#endif // defined(__linux__) 231 232#ifdef __LITTLE_ENDIAN__ 233# if __LITTLE_ENDIAN__ 234# define _LIBCPP_LITTLE_ENDIAN 235# endif // __LITTLE_ENDIAN__ 236#endif // __LITTLE_ENDIAN__ 237 238#ifdef __BIG_ENDIAN__ 239# if __BIG_ENDIAN__ 240# define _LIBCPP_BIG_ENDIAN 241# endif // __BIG_ENDIAN__ 242#endif // __BIG_ENDIAN__ 243 244#ifdef __BYTE_ORDER__ 245# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 246# define _LIBCPP_LITTLE_ENDIAN 247# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 248# define _LIBCPP_BIG_ENDIAN 249# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 250#endif // __BYTE_ORDER__ 251 252#ifdef __FreeBSD__ 253# include <sys/endian.h> 254# include <osreldate.h> 255# if _BYTE_ORDER == _LITTLE_ENDIAN 256# define _LIBCPP_LITTLE_ENDIAN 257# else // _BYTE_ORDER == _LITTLE_ENDIAN 258# define _LIBCPP_BIG_ENDIAN 259# endif // _BYTE_ORDER == _LITTLE_ENDIAN 260# ifndef __LONG_LONG_SUPPORTED 261# define _LIBCPP_HAS_NO_LONG_LONG 262# endif // __LONG_LONG_SUPPORTED 263#endif // __FreeBSD__ 264 265#ifdef __NetBSD__ 266# include <sys/endian.h> 267# if _BYTE_ORDER == _LITTLE_ENDIAN 268# define _LIBCPP_LITTLE_ENDIAN 269# else // _BYTE_ORDER == _LITTLE_ENDIAN 270# define _LIBCPP_BIG_ENDIAN 271# endif // _BYTE_ORDER == _LITTLE_ENDIAN 272#endif // __NetBSD__ 273 274#if defined(_WIN32) 275# define _LIBCPP_WIN32API 276# define _LIBCPP_LITTLE_ENDIAN 277# define _LIBCPP_SHORT_WCHAR 1 278// Both MinGW and native MSVC provide a "MSVC"-like environment 279# define _LIBCPP_MSVCRT_LIKE 280// If mingw not explicitly detected, assume using MS C runtime only if 281// a MS compatibility version is specified. 282# if defined(_MSC_VER) && !defined(__MINGW32__) 283# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library 284# endif 285# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) 286# define _LIBCPP_HAS_BITSCAN64 287# endif 288# define _LIBCPP_HAS_OPEN_WITH_WCHAR 289# if defined(_LIBCPP_MSVCRT) 290# define _LIBCPP_HAS_QUICK_EXIT 291# endif 292 293// Some CRT APIs are unavailable to store apps 294# if defined(WINAPI_FAMILY) 295# include <winapifamily.h> 296# if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \ 297 (!defined(WINAPI_PARTITION_SYSTEM) || \ 298 !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM)) 299# define _LIBCPP_WINDOWS_STORE_APP 300# endif 301# endif 302#endif // defined(_WIN32) 303 304#ifdef __sun__ 305# include <sys/isa_defs.h> 306# ifdef _LITTLE_ENDIAN 307# define _LIBCPP_LITTLE_ENDIAN 308# else 309# define _LIBCPP_BIG_ENDIAN 310# endif 311#endif // __sun__ 312 313#if defined(__CloudABI__) 314 // Certain architectures provide arc4random(). Prefer using 315 // arc4random() over /dev/{u,}random to make it possible to obtain 316 // random data even when using sandboxing mechanisms such as chroots, 317 // Capsicum, etc. 318# define _LIBCPP_USING_ARC4_RANDOM 319#elif defined(__Fuchsia__) || defined(__wasi__) 320# define _LIBCPP_USING_GETENTROPY 321#elif defined(__native_client__) 322 // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, 323 // including accesses to the special files under /dev. C++11's 324 // std::random_device is instead exposed through a NaCl syscall. 325# define _LIBCPP_USING_NACL_RANDOM 326#elif defined(_LIBCPP_WIN32API) 327# define _LIBCPP_USING_WIN32_RANDOM 328#else 329# define _LIBCPP_USING_DEV_RANDOM 330#endif 331 332#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 333# include <endian.h> 334# if __BYTE_ORDER == __LITTLE_ENDIAN 335# define _LIBCPP_LITTLE_ENDIAN 336# elif __BYTE_ORDER == __BIG_ENDIAN 337# define _LIBCPP_BIG_ENDIAN 338# else // __BYTE_ORDER == __BIG_ENDIAN 339# error unable to determine endian 340# endif 341#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) 342 343#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) 344# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) 345#else 346# define _LIBCPP_NO_CFI 347#endif 348 349#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L 350# if defined(__FreeBSD__) 351# define _LIBCPP_HAS_ALIGNED_ALLOC 352# define _LIBCPP_HAS_QUICK_EXIT 353# if __FreeBSD_version >= 1300064 || \ 354 (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000) 355# define _LIBCPP_HAS_TIMESPEC_GET 356# endif 357# elif defined(__BIONIC__) 358# if __ANDROID_API__ >= 21 359# define _LIBCPP_HAS_QUICK_EXIT 360# endif 361# if __ANDROID_API__ >= 28 362# define _LIBCPP_HAS_ALIGNED_ALLOC 363# endif 364# if __ANDROID_API__ >= 29 365# define _LIBCPP_HAS_TIMESPEC_GET 366# endif 367# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__) 368# define _LIBCPP_HAS_ALIGNED_ALLOC 369# define _LIBCPP_HAS_QUICK_EXIT 370# define _LIBCPP_HAS_TIMESPEC_GET 371# elif defined(__linux__) 372# if !defined(_LIBCPP_HAS_MUSL_LIBC) 373# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__) 374# define _LIBCPP_HAS_QUICK_EXIT 375# endif 376# if _LIBCPP_GLIBC_PREREQ(2, 17) 377# define _LIBCPP_HAS_ALIGNED_ALLOC 378# define _LIBCPP_HAS_TIMESPEC_GET 379# endif 380# else // defined(_LIBCPP_HAS_MUSL_LIBC) 381# define _LIBCPP_HAS_ALIGNED_ALLOC 382# define _LIBCPP_HAS_QUICK_EXIT 383# define _LIBCPP_HAS_TIMESPEC_GET 384# endif 385# elif defined(__APPLE__) 386 // timespec_get and aligned_alloc were introduced in macOS 10.15 and 387 // aligned releases 388# if (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500 || \ 389 __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000 || \ 390 __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000 || \ 391 __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000) 392# define _LIBCPP_HAS_ALIGNED_ALLOC 393# define _LIBCPP_HAS_TIMESPEC_GET 394# endif 395# endif // __APPLE__ 396#endif 397 398#ifndef _LIBCPP_CXX03_LANG 399# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) 400#elif defined(_LIBCPP_COMPILER_CLANG) 401# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) 402#else 403# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" 404#endif 405 406#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) 407 408#if defined(_LIBCPP_COMPILER_CLANG) 409 410#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT) 411# error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead 412#endif 413#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ 414 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) 415# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT 416#endif 417 418#if __has_feature(cxx_alignas) 419# define _ALIGNAS_TYPE(x) alignas(x) 420# define _ALIGNAS(x) alignas(x) 421#else 422# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 423# define _ALIGNAS(x) __attribute__((__aligned__(x))) 424#endif 425 426#if __cplusplus < 201103L 427typedef __char16_t char16_t; 428typedef __char32_t char32_t; 429#endif 430 431#if !__has_feature(cxx_exceptions) 432# define _LIBCPP_NO_EXCEPTIONS 433#endif 434 435#if !(__has_feature(cxx_strong_enums)) 436#define _LIBCPP_HAS_NO_STRONG_ENUMS 437#endif 438 439#if __has_feature(cxx_attributes) 440# define _LIBCPP_NORETURN [[noreturn]] 441#else 442# define _LIBCPP_NORETURN __attribute__ ((noreturn)) 443#endif 444 445#if !(__has_feature(cxx_nullptr)) 446# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR) 447# define nullptr __nullptr 448# else 449# define _LIBCPP_HAS_NO_NULLPTR 450# endif 451#endif 452 453// Objective-C++ features (opt-in) 454#if __has_feature(objc_arc) 455#define _LIBCPP_HAS_OBJC_ARC 456#endif 457 458#if __has_feature(objc_arc_weak) 459#define _LIBCPP_HAS_OBJC_ARC_WEAK 460#endif 461 462#if __has_extension(blocks) 463# define _LIBCPP_HAS_EXTENSION_BLOCKS 464#endif 465 466#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) 467# define _LIBCPP_HAS_BLOCKS_RUNTIME 468#endif 469 470#if !(__has_feature(cxx_relaxed_constexpr)) 471#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR 472#endif 473 474#if !(__has_feature(cxx_variable_templates)) 475#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 476#endif 477 478#if !(__has_feature(cxx_noexcept)) 479#define _LIBCPP_HAS_NO_NOEXCEPT 480#endif 481 482#if !defined(_LIBCPP_HAS_NO_ASAN) && !__has_feature(address_sanitizer) 483#define _LIBCPP_HAS_NO_ASAN 484#endif 485 486// Allow for build-time disabling of unsigned integer sanitization 487#if !defined(_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK) && __has_attribute(no_sanitize) 488#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) 489#endif 490 491#if __has_builtin(__builtin_launder) 492#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER 493#endif 494 495#if __has_builtin(__builtin_constant_p) 496#define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P 497#endif 498 499#if !__is_identifier(__has_unique_object_representations) 500#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS 501#endif 502 503#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 504 505// Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1 506#if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 800) || \ 507 (defined(__apple_build_version__) && __apple_build_version__ < 10010000) 508#define _LIBCPP_HAS_NO_CXX20_CHRONO_LITERALS 509#endif 510 511#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 512 513#elif defined(_LIBCPP_COMPILER_GCC) 514 515#define _ALIGNAS(x) __attribute__((__aligned__(x))) 516#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 517 518#define _LIBCPP_NORETURN __attribute__((noreturn)) 519 520#if !__EXCEPTIONS 521# define _LIBCPP_NO_EXCEPTIONS 522#endif 523 524// Determine if GCC supports relaxed constexpr 525#if !defined(__cpp_constexpr) || __cpp_constexpr < 201304L 526#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR 527#endif 528 529// GCC 5 supports variable templates 530#if !defined(__cpp_variable_templates) || __cpp_variable_templates < 201304L 531#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 532#endif 533 534#if !defined(_LIBCPP_HAS_NO_ASAN) && !defined(__SANITIZE_ADDRESS__) 535#define _LIBCPP_HAS_NO_ASAN 536#endif 537 538#if _GNUC_VER >= 700 539#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER 540#define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P 541#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS 542#endif 543 544#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 545 546#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ 547 548#elif defined(_LIBCPP_COMPILER_MSVC) 549 550#define _LIBCPP_TOSTRING2(x) #x 551#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) 552#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) 553 554#if _MSC_VER < 1900 555#error "MSVC versions prior to Visual Studio 2015 are not supported" 556#endif 557 558#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR 559#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 560#define __alignof__ __alignof 561#define _LIBCPP_NORETURN __declspec(noreturn) 562#define _ALIGNAS(x) __declspec(align(x)) 563#define _ALIGNAS_TYPE(x) alignas(x) 564 565#define _LIBCPP_WEAK 566 567#define _LIBCPP_HAS_NO_ASAN 568 569#define _LIBCPP_ALWAYS_INLINE __forceinline 570 571#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 572 573#define _LIBCPP_DISABLE_EXTENSION_WARNING 574 575#elif defined(_LIBCPP_COMPILER_IBM) 576 577#define _ALIGNAS(x) __attribute__((__aligned__(x))) 578#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) 579#define _ATTRIBUTE(x) __attribute__((x)) 580#define _LIBCPP_NORETURN __attribute__((noreturn)) 581 582#define _LIBCPP_HAS_NO_UNICODE_CHARS 583#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES 584 585#if defined(_AIX) 586#define __MULTILOCALE_API 587#endif 588 589#define _LIBCPP_HAS_NO_ASAN 590 591#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) 592 593#define _LIBCPP_HAS_NO_VECTOR_EXTENSION 594 595#define _LIBCPP_DISABLE_EXTENSION_WARNING 596 597#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] 598 599#if defined(_LIBCPP_OBJECT_FORMAT_COFF) 600 601#ifdef _DLL 602# define _LIBCPP_CRT_FUNC __declspec(dllimport) 603#else 604# define _LIBCPP_CRT_FUNC 605#endif 606 607#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 608# define _LIBCPP_DLL_VIS 609# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 610# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 611# define _LIBCPP_OVERRIDABLE_FUNC_VIS 612# define _LIBCPP_EXPORTED_FROM_ABI 613#elif defined(_LIBCPP_BUILDING_LIBRARY) 614# define _LIBCPP_DLL_VIS __declspec(dllexport) 615# if defined(__MINGW32__) 616# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 617# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 618# else 619# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 620# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS 621# endif 622# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS 623# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) 624#else 625# define _LIBCPP_DLL_VIS __declspec(dllimport) 626# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS 627# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 628# define _LIBCPP_OVERRIDABLE_FUNC_VIS 629# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) 630#endif 631 632#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS 633#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS 634#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS 635#define _LIBCPP_HIDDEN 636#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 637#define _LIBCPP_TEMPLATE_VIS 638#define _LIBCPP_ENUM_VIS 639 640#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) 641 642#ifndef _LIBCPP_HIDDEN 643# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 644# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) 645# else 646# define _LIBCPP_HIDDEN 647# endif 648#endif 649 650#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 651# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 652// The inline should be removed once PR32114 is resolved 653# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN 654# else 655# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS 656# endif 657#endif 658 659#ifndef _LIBCPP_FUNC_VIS 660# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 661# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) 662# else 663# define _LIBCPP_FUNC_VIS 664# endif 665#endif 666 667#ifndef _LIBCPP_TYPE_VIS 668# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 669# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) 670# else 671# define _LIBCPP_TYPE_VIS 672# endif 673#endif 674 675#ifndef _LIBCPP_TEMPLATE_VIS 676# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 677# if __has_attribute(__type_visibility__) 678# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) 679# else 680# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) 681# endif 682# else 683# define _LIBCPP_TEMPLATE_VIS 684# endif 685#endif 686 687#ifndef _LIBCPP_EXPORTED_FROM_ABI 688# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 689# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) 690# else 691# define _LIBCPP_EXPORTED_FROM_ABI 692# endif 693#endif 694 695#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS 696#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS 697#endif 698 699#ifndef _LIBCPP_EXCEPTION_ABI 700# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) 701# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) 702# else 703# define _LIBCPP_EXCEPTION_ABI 704# endif 705#endif 706 707#ifndef _LIBCPP_ENUM_VIS 708# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 709# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) 710# else 711# define _LIBCPP_ENUM_VIS 712# endif 713#endif 714 715#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 716# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) 717# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) 718# else 719# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS 720# endif 721#endif 722 723#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 724#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS 725#endif 726 727#if __has_attribute(internal_linkage) 728# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) 729#else 730# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE 731#endif 732 733#if __has_attribute(exclude_from_explicit_instantiation) 734# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) 735#else 736 // Try to approximate the effect of exclude_from_explicit_instantiation 737 // (which is that entities are not assumed to be provided by explicit 738 // template instantiations in the dylib) by always inlining those entities. 739# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE 740#endif 741 742#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU 743# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT 744# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 745# else 746# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 747# endif 748#endif 749 750#ifndef _LIBCPP_HIDE_FROM_ABI 751# if _LIBCPP_HIDE_FROM_ABI_PER_TU 752# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE 753# else 754# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION 755# endif 756#endif 757 758#ifdef _LIBCPP_BUILDING_LIBRARY 759# if _LIBCPP_ABI_VERSION > 1 760# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 761# else 762# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 763# endif 764#else 765# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI 766#endif 767 768// Just so we can migrate to the new macros gradually. 769#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI 770 771// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. 772#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { 773#define _LIBCPP_END_NAMESPACE_STD } } 774#define _VSTD std::_LIBCPP_ABI_NAMESPACE 775_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD 776 777#if _LIBCPP_STD_VER >= 17 778#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 779 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { 780#else 781#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ 782 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { 783#endif 784 785#define _LIBCPP_END_NAMESPACE_FILESYSTEM \ 786 _LIBCPP_END_NAMESPACE_STD } } 787 788#define _VSTD_FS _VSTD::__fs::filesystem 789 790#ifndef _LIBCPP_PREFERRED_OVERLOAD 791# if __has_attribute(__enable_if__) 792# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) 793# endif 794#endif 795 796#ifndef _LIBCPP_HAS_NO_NOEXCEPT 797# define _NOEXCEPT noexcept 798# define _NOEXCEPT_(x) noexcept(x) 799#else 800# define _NOEXCEPT throw() 801# define _NOEXCEPT_(x) 802#endif 803 804#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS 805typedef unsigned short char16_t; 806typedef unsigned int char32_t; 807#endif // _LIBCPP_HAS_NO_UNICODE_CHARS 808 809#ifndef __SIZEOF_INT128__ 810#define _LIBCPP_HAS_NO_INT128 811#endif 812 813#ifdef _LIBCPP_CXX03_LANG 814# define static_assert(...) _Static_assert(__VA_ARGS__) 815# define decltype(...) __decltype(__VA_ARGS__) 816#endif // _LIBCPP_CXX03_LANG 817 818#ifdef _LIBCPP_CXX03_LANG 819# define _LIBCPP_CONSTEXPR 820#else 821# define _LIBCPP_CONSTEXPR constexpr 822#endif 823 824#ifndef __cpp_consteval 825# define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR 826#else 827# define _LIBCPP_CONSTEVAL consteval 828#endif 829 830#ifdef _LIBCPP_CXX03_LANG 831# define _LIBCPP_DEFAULT {} 832#else 833# define _LIBCPP_DEFAULT = default; 834#endif 835 836#ifdef _LIBCPP_CXX03_LANG 837# define _LIBCPP_EQUAL_DELETE 838#else 839# define _LIBCPP_EQUAL_DELETE = delete 840#endif 841 842#ifdef __GNUC__ 843# define _LIBCPP_NOALIAS __attribute__((__malloc__)) 844#else 845# define _LIBCPP_NOALIAS 846#endif 847 848#if __has_feature(cxx_explicit_conversions) || defined(__IBMCPP__) || \ 849 (!defined(_LIBCPP_CXX03_LANG) && defined(__GNUC__)) // All supported GCC versions 850# define _LIBCPP_EXPLICIT explicit 851#else 852# define _LIBCPP_EXPLICIT 853#endif 854 855#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS 856# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx 857# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ 858 __lx __v_; \ 859 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ 860 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ 861 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ 862 }; 863#else // _LIBCPP_HAS_NO_STRONG_ENUMS 864# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x 865# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) 866#endif // _LIBCPP_HAS_NO_STRONG_ENUMS 867 868// _LIBCPP_DEBUG potential values: 869// - undefined: No assertions. This is the default. 870// - 0: Basic assertions 871// - 1: Basic assertions + iterator validity checks. 872#if !defined(_LIBCPP_DEBUG) 873# define _LIBCPP_DEBUG_LEVEL 0 874#elif _LIBCPP_DEBUG == 0 875# define _LIBCPP_DEBUG_LEVEL 1 876#elif _LIBCPP_DEBUG == 1 877# define _LIBCPP_DEBUG_LEVEL 2 878#else 879# error Supported values for _LIBCPP_DEBUG are 0 and 1 880#endif 881 882// _LIBCPP_DEBUG_LEVEL is always defined to one of [0, 1, 2] at this point 883#if _LIBCPP_DEBUG_LEVEL >= 1 884# define _LIBCPP_DISABLE_EXTERN_TEMPLATE 885#endif 886 887#ifdef _LIBCPP_DISABLE_EXTERN_TEMPLATE 888#define _LIBCPP_EXTERN_TEMPLATE(...) 889#endif 890 891#ifndef _LIBCPP_EXTERN_TEMPLATE 892#define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; 893#endif 894 895#ifndef _LIBCPP_EXTERN_TEMPLATE_DEFINE 896#define _LIBCPP_EXTERN_TEMPLATE_DEFINE(...) template __VA_ARGS__; 897#endif 898 899#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ 900 defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__) 901#define _LIBCPP_LOCALE__L_EXTENSIONS 1 902#endif 903 904#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__)) 905// Most unix variants have catopen. These are the specific ones that don't. 906# if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) 907# define _LIBCPP_HAS_CATOPEN 1 908# endif 909#endif 910 911#ifdef __FreeBSD__ 912#define _DECLARE_C99_LDBL_MATH 1 913#endif 914 915// If we are getting operator new from the MSVC CRT, then allocation overloads 916// for align_val_t were added in 19.12, aka VS 2017 version 15.3. 917#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 918# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 919#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) 920 // We're deferring to Microsoft's STL to provide aligned new et al. We don't 921 // have it unless the language feature test macro is defined. 922# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 923#elif defined(__MVS__) 924# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION 925#endif 926 927#if defined(__APPLE__) 928# if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \ 929 defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) 930# define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 931# endif 932#endif // defined(__APPLE__) 933 934#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \ 935 (defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ 936 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)) 937# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION 938#endif 939 940#if defined(__APPLE__) || defined(__FreeBSD__) 941#define _LIBCPP_HAS_DEFAULTRUNELOCALE 942#endif 943 944#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) 945#define _LIBCPP_WCTYPE_IS_MASK 946#endif 947 948#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) 949#define _LIBCPP_NO_HAS_CHAR8_T 950#endif 951 952// Deprecation macros. 953// 954// Deprecations warnings are always enabled, except when users explicitly opt-out 955// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. 956#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) 957# if __has_attribute(deprecated) 958# define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) 959# elif _LIBCPP_STD_VER > 11 960# define _LIBCPP_DEPRECATED [[deprecated]] 961# else 962# define _LIBCPP_DEPRECATED 963# endif 964#else 965# define _LIBCPP_DEPRECATED 966#endif 967 968#if !defined(_LIBCPP_CXX03_LANG) 969# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED 970#else 971# define _LIBCPP_DEPRECATED_IN_CXX11 972#endif 973 974#if _LIBCPP_STD_VER >= 14 975# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED 976#else 977# define _LIBCPP_DEPRECATED_IN_CXX14 978#endif 979 980#if _LIBCPP_STD_VER >= 17 981# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED 982#else 983# define _LIBCPP_DEPRECATED_IN_CXX17 984#endif 985 986#if _LIBCPP_STD_VER > 17 987# define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED 988#else 989# define _LIBCPP_DEPRECATED_IN_CXX20 990#endif 991 992#if !defined(_LIBCPP_NO_HAS_CHAR8_T) 993# define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED 994#else 995# define _LIBCPP_DEPRECATED_WITH_CHAR8_T 996#endif 997 998// Macros to enter and leave a state where deprecation warnings are suppressed. 999#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) && \ 1000 (defined(_LIBCPP_COMPILER_CLANG) || defined(_LIBCPP_COMPILER_GCC)) 1001# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ 1002 _Pragma("GCC diagnostic push") \ 1003 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") 1004# define _LIBCPP_SUPPRESS_DEPRECATED_POP \ 1005 _Pragma("GCC diagnostic pop") 1006#endif 1007#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) 1008# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1009# define _LIBCPP_SUPPRESS_DEPRECATED_POP 1010#endif 1011 1012#if _LIBCPP_STD_VER <= 11 1013# define _LIBCPP_EXPLICIT_AFTER_CXX11 1014#else 1015# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit 1016#endif 1017 1018#if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1019# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr 1020#else 1021# define _LIBCPP_CONSTEXPR_AFTER_CXX11 1022#endif 1023 1024#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1025# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr 1026#else 1027# define _LIBCPP_CONSTEXPR_AFTER_CXX14 1028#endif 1029 1030#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1031# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr 1032#else 1033# define _LIBCPP_CONSTEXPR_AFTER_CXX17 1034#endif 1035 1036// The _LIBCPP_NODISCARD_ATTRIBUTE should only be used to define other 1037// NODISCARD macros to the correct attribute. 1038#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) 1039# define _LIBCPP_NODISCARD_ATTRIBUTE [[nodiscard]] 1040#elif defined(_LIBCPP_COMPILER_CLANG) && !defined(_LIBCPP_CXX03_LANG) 1041# define _LIBCPP_NODISCARD_ATTRIBUTE [[clang::warn_unused_result]] 1042#else 1043// We can't use GCC's [[gnu::warn_unused_result]] and 1044// __attribute__((warn_unused_result)), because GCC does not silence them via 1045// (void) cast. 1046# define _LIBCPP_NODISCARD_ATTRIBUTE 1047#endif 1048 1049// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not 1050// specified as such as an extension. 1051#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) 1052# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD_ATTRIBUTE 1053#else 1054# define _LIBCPP_NODISCARD_EXT 1055#endif 1056 1057#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ 1058 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) 1059# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD_ATTRIBUTE 1060#else 1061# define _LIBCPP_NODISCARD_AFTER_CXX17 1062#endif 1063 1064#if _LIBCPP_STD_VER > 14 && defined(__cpp_inline_variables) && (__cpp_inline_variables >= 201606L) 1065# define _LIBCPP_INLINE_VAR inline 1066#else 1067# define _LIBCPP_INLINE_VAR 1068#endif 1069 1070#ifndef _LIBCPP_CONSTEXPR_IF_NODEBUG 1071#if defined(_LIBCPP_DEBUG) || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) 1072#define _LIBCPP_CONSTEXPR_IF_NODEBUG 1073#else 1074#define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr 1075#endif 1076#endif 1077 1078#if __has_attribute(no_destroy) 1079# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) 1080#else 1081# define _LIBCPP_NO_DESTROY 1082#endif 1083 1084#ifndef _LIBCPP_HAS_NO_ASAN 1085_LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container( 1086 const void *, const void *, const void *, const void *); 1087#endif 1088 1089// Try to find out if RTTI is disabled. 1090#if defined(_LIBCPP_COMPILER_CLANG) && !__has_feature(cxx_rtti) 1091# define _LIBCPP_NO_RTTI 1092#elif defined(__GNUC__) && !defined(__GXX_RTTI) 1093# define _LIBCPP_NO_RTTI 1094#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) 1095# define _LIBCPP_NO_RTTI 1096#endif 1097 1098#ifndef _LIBCPP_WEAK 1099#define _LIBCPP_WEAK __attribute__((__weak__)) 1100#endif 1101 1102// Thread API 1103#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 1104 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ 1105 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ 1106 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1107# if defined(__FreeBSD__) || \ 1108 defined(__wasi__) || \ 1109 defined(__NetBSD__) || \ 1110 defined(__NuttX__) || \ 1111 defined(__linux__) || \ 1112 defined(__GNU__) || \ 1113 defined(__APPLE__) || \ 1114 defined(__CloudABI__) || \ 1115 defined(__sun__) || \ 1116 defined(__MVS__) || \ 1117 (defined(__MINGW32__) && __has_include(<pthread.h>)) 1118# define _LIBCPP_HAS_THREAD_API_PTHREAD 1119# elif defined(__Fuchsia__) 1120 // TODO(44575): Switch to C11 thread API when possible. 1121# define _LIBCPP_HAS_THREAD_API_PTHREAD 1122# elif defined(_LIBCPP_WIN32API) 1123# define _LIBCPP_HAS_THREAD_API_WIN32 1124# else 1125# error "No thread API" 1126# endif // _LIBCPP_HAS_THREAD_API 1127#endif // _LIBCPP_HAS_NO_THREADS 1128 1129#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1130#if defined(__ANDROID__) && __ANDROID_API__ >= 30 1131#define _LIBCPP_HAS_COND_CLOCKWAIT 1132#elif defined(_LIBCPP_GLIBC_PREREQ) 1133#if _LIBCPP_GLIBC_PREREQ(2, 30) 1134#define _LIBCPP_HAS_COND_CLOCKWAIT 1135#endif 1136#endif 1137#endif 1138 1139#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) 1140#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ 1141 _LIBCPP_HAS_NO_THREADS is not defined. 1142#endif 1143 1144#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) 1145#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ 1146 _LIBCPP_HAS_NO_THREADS is defined. 1147#endif 1148 1149#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) 1150#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ 1151 _LIBCPP_HAS_NO_THREADS is defined. 1152#endif 1153 1154#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) 1155#define __STDCPP_THREADS__ 1 1156#endif 1157 1158// The glibc and Bionic implementation of pthreads implements 1159// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 1160// mutexes have no destroy mechanism. 1161// 1162// This optimization can't be performed on Apple platforms, where 1163// pthread_mutex_destroy can allow the kernel to release resources. 1164// See https://llvm.org/D64298 for details. 1165// 1166// TODO(EricWF): Enable this optimization on Bionic after speaking to their 1167// respective stakeholders. 1168#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ 1169 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ 1170 || defined(_LIBCPP_HAS_THREAD_API_WIN32) 1171# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION 1172#endif 1173 1174// Destroying a condvar is a nop on Windows. 1175// 1176// This optimization can't be performed on Apple platforms, where 1177// pthread_cond_destroy can allow the kernel to release resources. 1178// See https://llvm.org/D64298 for details. 1179// 1180// TODO(EricWF): This is potentially true for some pthread implementations 1181// as well. 1182#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ 1183 defined(_LIBCPP_HAS_THREAD_API_WIN32) 1184# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION 1185#endif 1186 1187// Systems that use capability-based security (FreeBSD with Capsicum, 1188// Nuxi CloudABI) may only provide local filesystem access (using *at()). 1189// Functions like open(), rename(), unlink() and stat() should not be 1190// used, as they attempt to access the global filesystem namespace. 1191#ifdef __CloudABI__ 1192#define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE 1193#endif 1194 1195// CloudABI is intended for running networked services. Processes do not 1196// have standard input and output channels. 1197#ifdef __CloudABI__ 1198#define _LIBCPP_HAS_NO_STDIN 1199#define _LIBCPP_HAS_NO_STDOUT 1200#endif 1201 1202// Some systems do not provide gets() in their C library, for security reasons. 1203#ifndef _LIBCPP_C_HAS_NO_GETS 1204# if defined(_LIBCPP_MSVCRT) || \ 1205 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) 1206# define _LIBCPP_C_HAS_NO_GETS 1207# endif 1208#endif 1209 1210#if defined(__BIONIC__) || defined(__CloudABI__) || defined(__NuttX__) || \ 1211 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) || \ 1212 defined(__MVS__) 1213#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE 1214#endif 1215 1216// Thread-unsafe functions such as strtok() and localtime() 1217// are not available. 1218#ifdef __CloudABI__ 1219#define _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS 1220#endif 1221 1222#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) 1223# define _LIBCPP_HAS_C_ATOMIC_IMP 1224#elif defined(_LIBCPP_COMPILER_GCC) 1225# define _LIBCPP_HAS_GCC_ATOMIC_IMP 1226#endif 1227 1228#if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ 1229 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ 1230 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)) \ 1231 || defined(_LIBCPP_HAS_NO_THREADS) 1232# define _LIBCPP_HAS_NO_ATOMIC_HEADER 1233#else 1234# ifndef _LIBCPP_ATOMIC_FLAG_TYPE 1235# define _LIBCPP_ATOMIC_FLAG_TYPE bool 1236# endif 1237# ifdef _LIBCPP_FREESTANDING 1238# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS 1239# endif 1240#endif 1241 1242#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1243#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 1244#endif 1245 1246#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) 1247# if defined(__clang__) && __has_attribute(acquire_capability) 1248// Work around the attribute handling in clang. When both __declspec and 1249// __attribute__ are present, the processing goes awry preventing the definition 1250// of the types. 1251# if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1252# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1253# endif 1254# endif 1255#endif 1256 1257#ifndef _LIBCPP_THREAD_SAFETY_ANNOTATION 1258# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS 1259# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) 1260# else 1261# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) 1262# endif 1263#endif // _LIBCPP_THREAD_SAFETY_ANNOTATION 1264 1265#if __has_attribute(require_constant_initialization) 1266# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__)) 1267#else 1268# define _LIBCPP_SAFE_STATIC 1269#endif 1270 1271#if !__has_builtin(__builtin_addressof) && _GNUC_VER < 700 1272#define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF 1273#endif 1274 1275#if !__has_builtin(__builtin_is_constant_evaluated) && _GNUC_VER < 900 1276#define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED 1277#endif 1278 1279#if !defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS) 1280# if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION) 1281# define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS 1282# endif 1283#endif 1284 1285#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) 1286# define _LIBCPP_DIAGNOSE_WARNING(...) \ 1287 __attribute__((diagnose_if(__VA_ARGS__, "warning"))) 1288# define _LIBCPP_DIAGNOSE_ERROR(...) \ 1289 __attribute__((diagnose_if(__VA_ARGS__, "error"))) 1290#else 1291# define _LIBCPP_DIAGNOSE_WARNING(...) 1292# define _LIBCPP_DIAGNOSE_ERROR(...) 1293#endif 1294 1295// Use a function like macro to imply that it must be followed by a semicolon 1296#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough) 1297# define _LIBCPP_FALLTHROUGH() [[fallthrough]] 1298#elif __has_cpp_attribute(clang::fallthrough) 1299# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] 1300#elif __has_attribute(fallthrough) || _GNUC_VER >= 700 1301# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) 1302#else 1303# define _LIBCPP_FALLTHROUGH() ((void)0) 1304#endif 1305 1306#if __has_attribute(__nodebug__) 1307#define _LIBCPP_NODEBUG __attribute__((__nodebug__)) 1308#else 1309#define _LIBCPP_NODEBUG 1310#endif 1311 1312#ifndef _LIBCPP_NODEBUG_TYPE 1313#if __has_attribute(__nodebug__) && \ 1314 (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 900) 1315#define _LIBCPP_NODEBUG_TYPE __attribute__((nodebug)) 1316#else 1317#define _LIBCPP_NODEBUG_TYPE 1318#endif 1319#endif // !defined(_LIBCPP_NODEBUG_TYPE) 1320 1321#if defined(_LIBCPP_ABI_MICROSOFT) && \ 1322 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) 1323# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) 1324#else 1325# define _LIBCPP_DECLSPEC_EMPTY_BASES 1326#endif 1327 1328#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) 1329#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR 1330#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS 1331#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE 1332#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS 1333#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES 1334 1335#if !defined(__cpp_deduction_guides) || __cpp_deduction_guides < 201611 1336#define _LIBCPP_HAS_NO_DEDUCTION_GUIDES 1337#endif 1338 1339#if !__has_keyword(__is_aggregate) && (_GNUC_VER_NEW < 7001) 1340#define _LIBCPP_HAS_NO_IS_AGGREGATE 1341#endif 1342 1343#if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L 1344#define _LIBCPP_HAS_NO_COROUTINES 1345#endif 1346 1347#if !defined(__cpp_impl_three_way_comparison) || __cpp_impl_three_way_comparison < 201907L 1348#define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR 1349#endif 1350 1351#if defined(_LIBCPP_COMPILER_IBM) 1352#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO 1353#endif 1354 1355#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1356# define _LIBCPP_PUSH_MACROS 1357# define _LIBCPP_POP_MACROS 1358#else 1359 // Don't warn about macro conflicts when we can restore them at the 1360 // end of the header. 1361# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1362# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS 1363# endif 1364# if defined(_LIBCPP_COMPILER_MSVC) 1365# define _LIBCPP_PUSH_MACROS \ 1366 __pragma(push_macro("min")) \ 1367 __pragma(push_macro("max")) 1368# define _LIBCPP_POP_MACROS \ 1369 __pragma(pop_macro("min")) \ 1370 __pragma(pop_macro("max")) 1371# else 1372# define _LIBCPP_PUSH_MACROS \ 1373 _Pragma("push_macro(\"min\")") \ 1374 _Pragma("push_macro(\"max\")") 1375# define _LIBCPP_POP_MACROS \ 1376 _Pragma("pop_macro(\"min\")") \ 1377 _Pragma("pop_macro(\"max\")") 1378# endif 1379#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) 1380 1381#ifndef _LIBCPP_NO_AUTO_LINK 1382# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1383# if defined(_DLL) 1384# pragma comment(lib, "c++.lib") 1385# else 1386# pragma comment(lib, "libc++.lib") 1387# endif 1388# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) 1389#endif // _LIBCPP_NO_AUTO_LINK 1390 1391#define _LIBCPP_UNUSED_VAR(x) ((void)(x)) 1392 1393// Configures the fopen close-on-exec mode character, if any. This string will 1394// be appended to any mode string used by fstream for fopen/fdopen. 1395// 1396// Not all platforms support this, but it helps avoid fd-leaks on platforms that 1397// do. 1398#if defined(__BIONIC__) 1399# define _LIBCPP_FOPEN_CLOEXEC_MODE "e" 1400#else 1401# define _LIBCPP_FOPEN_CLOEXEC_MODE 1402#endif 1403 1404#ifdef _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P 1405#define _LIBCPP_BUILTIN_CONSTANT_P(x) __builtin_constant_p(x) 1406#else 1407#define _LIBCPP_BUILTIN_CONSTANT_P(x) false 1408#endif 1409 1410// Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set 1411// of functions used in cstdio may not be available for low API levels when 1412// using 64-bit file offsets on LP32. 1413#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 1414#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS 1415#endif 1416 1417#if __has_attribute(init_priority) 1418# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) 1419#else 1420# define _LIBCPP_INIT_PRIORITY_MAX 1421#endif 1422 1423#endif // __cplusplus 1424 1425#endif // _LIBCPP_CONFIG 1426