2 //===--------------------------- __config ---------------------------------===//
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
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_CONFIG
11 #define _LIBCPP_CONFIG
13 #if defined(_MSC_VER) && !defined(__clang__)
14 # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
15 # define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
19 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
20 #pragma GCC system_header
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__)
32 # define _GNUC_VER_NEW 0
35 #define _LIBCPP_VERSION 10000
37 #ifndef _LIBCPP_ABI_VERSION
38 # define _LIBCPP_ABI_VERSION 1
41 #ifndef __STDC_HOSTED__
42 # define _LIBCPP_FREESTANDING
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
53 # define _LIBCPP_STD_VER 18 // current year, or date of c++2a ratification
55 #endif // _LIBCPP_STD_VER
58 # define _LIBCPP_OBJECT_FORMAT_ELF 1
59 #elif defined(__MACH__)
60 # define _LIBCPP_OBJECT_FORMAT_MACHO 1
62 # define _LIBCPP_OBJECT_FORMAT_COFF 1
63 #elif defined(__wasm__)
64 # define _LIBCPP_OBJECT_FORMAT_WASM 1
66 # error Unknown object file format
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
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 #elif _LIBCPP_ABI_VERSION == 1
106 # if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
107 // Enable compiling copies of now inline methods into the dylib to support
108 // applications compiled against older libraries. This is unnecessary with
109 // COFF dllexport semantics, since dllexport forces a non-inline definition
110 // of inline functions to be emitted anyway. Our own non-inline copy would
111 // conflict with the dllexport-emitted copy, so we disable it.
112 # define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
114 // Feature macros for disabling pre ABI v1 features. All of these options
116 # if defined(__FreeBSD__)
117 # define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
121 #ifdef _LIBCPP_TRIVIAL_PAIR_COPY_CTOR
122 #error "_LIBCPP_TRIVIAL_PAIR_COPY_CTOR" is no longer supported. \
123 use _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR instead
126 #define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
127 #define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)
129 #ifndef _LIBCPP_ABI_NAMESPACE
130 # define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)
133 #if __cplusplus < 201103L
134 #define _LIBCPP_CXX03_LANG
137 #ifndef __has_attribute
138 #define __has_attribute(__x) 0
141 #ifndef __has_builtin
142 #define __has_builtin(__x) 0
145 #ifndef __has_extension
146 #define __has_extension(__x) 0
149 #ifndef __has_feature
150 #define __has_feature(__x) 0
153 #ifndef __has_cpp_attribute
154 #define __has_cpp_attribute(__x) 0
157 // '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
158 // the compiler and '1' otherwise.
159 #ifndef __is_identifier
160 #define __is_identifier(__x) 1
163 #ifndef __has_declspec_attribute
164 #define __has_declspec_attribute(__x) 0
167 #define __has_keyword(__x) !(__is_identifier(__x))
169 #ifndef __has_include
170 #define __has_include(...) 0
173 #if defined(__clang__)
174 # define _LIBCPP_COMPILER_CLANG
175 # ifndef __apple_build_version__
176 # define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
178 #elif defined(__GNUC__)
179 # define _LIBCPP_COMPILER_GCC
180 #elif defined(_MSC_VER)
181 # define _LIBCPP_COMPILER_MSVC
182 #elif defined(__IBMCPP__)
183 # define _LIBCPP_COMPILER_IBM
186 #if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L
187 #error "libc++ does not support using GCC with C++03. Please enable C++11"
190 // FIXME: ABI detection should be done via compiler builtin macros. This
191 // is just a placeholder until Clang implements such macros. For now assume
192 // that Windows compilers pretending to be MSVC++ target the Microsoft ABI,
193 // and allow the user to explicitly specify the ABI to handle cases where this
194 // heuristic falls short.
195 #if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
196 # error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
197 #elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
198 # define _LIBCPP_ABI_ITANIUM
199 #elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
200 # define _LIBCPP_ABI_MICROSOFT
202 # if defined(_WIN32) && defined(_MSC_VER)
203 # define _LIBCPP_ABI_MICROSOFT
205 # define _LIBCPP_ABI_ITANIUM
209 #if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
210 # define _LIBCPP_ABI_VCRUNTIME
213 // Need to detect which libc we're using if we're on Linux.
214 #if defined(__linux__)
215 # include <features.h>
216 # if defined(__GLIBC_PREREQ)
217 # define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
219 # define _LIBCPP_GLIBC_PREREQ(a, b) 0
220 # endif // defined(__GLIBC_PREREQ)
221 #endif // defined(__linux__)
223 #ifdef __LITTLE_ENDIAN__
224 # if __LITTLE_ENDIAN__
225 # define _LIBCPP_LITTLE_ENDIAN
226 # endif // __LITTLE_ENDIAN__
227 #endif // __LITTLE_ENDIAN__
229 #ifdef __BIG_ENDIAN__
231 # define _LIBCPP_BIG_ENDIAN
232 # endif // __BIG_ENDIAN__
233 #endif // __BIG_ENDIAN__
235 #ifdef __BYTE_ORDER__
236 # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
237 # define _LIBCPP_LITTLE_ENDIAN
238 # elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
239 # define _LIBCPP_BIG_ENDIAN
240 # endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
241 #endif // __BYTE_ORDER__
244 # include <sys/endian.h>
245 # include <osreldate.h>
246 # if _BYTE_ORDER == _LITTLE_ENDIAN
247 # define _LIBCPP_LITTLE_ENDIAN
248 # else // _BYTE_ORDER == _LITTLE_ENDIAN
249 # define _LIBCPP_BIG_ENDIAN
250 # endif // _BYTE_ORDER == _LITTLE_ENDIAN
251 # ifndef __LONG_LONG_SUPPORTED
252 # define _LIBCPP_HAS_NO_LONG_LONG
253 # endif // __LONG_LONG_SUPPORTED
254 #endif // __FreeBSD__
257 # include <sys/endian.h>
258 # if _BYTE_ORDER == _LITTLE_ENDIAN
259 # define _LIBCPP_LITTLE_ENDIAN
260 # else // _BYTE_ORDER == _LITTLE_ENDIAN
261 # define _LIBCPP_BIG_ENDIAN
262 # endif // _BYTE_ORDER == _LITTLE_ENDIAN
266 # define _LIBCPP_WIN32API
267 # define _LIBCPP_LITTLE_ENDIAN
268 # define _LIBCPP_SHORT_WCHAR 1
269 // Both MinGW and native MSVC provide a "MSVC"-like environment
270 # define _LIBCPP_MSVCRT_LIKE
271 // If mingw not explicitly detected, assume using MS C runtime only if
272 // a MS compatibility version is specified.
273 # if defined(_MSC_VER) && !defined(__MINGW32__)
274 # define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
276 # if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
277 # define _LIBCPP_HAS_BITSCAN64
279 # define _LIBCPP_HAS_OPEN_WITH_WCHAR
280 # if defined(_LIBCPP_MSVCRT)
281 # define _LIBCPP_HAS_QUICK_EXIT
284 // Some CRT APIs are unavailable to store apps
285 # if defined(WINAPI_FAMILY)
286 # include <winapifamily.h>
287 # if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \
288 (!defined(WINAPI_PARTITION_SYSTEM) || \
289 !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM))
290 # define _LIBCPP_WINDOWS_STORE_APP
293 #endif // defined(_WIN32)
296 # include <sys/isa_defs.h>
297 # ifdef _LITTLE_ENDIAN
298 # define _LIBCPP_LITTLE_ENDIAN
300 # define _LIBCPP_BIG_ENDIAN
304 #if defined(__CloudABI__)
305 // Certain architectures provide arc4random(). Prefer using
306 // arc4random() over /dev/{u,}random to make it possible to obtain
307 // random data even when using sandboxing mechanisms such as chroots,
309 # define _LIBCPP_USING_ARC4_RANDOM
310 #elif defined(__Fuchsia__) || defined(__wasi__)
311 # define _LIBCPP_USING_GETENTROPY
312 #elif defined(__native_client__)
313 // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
314 // including accesses to the special files under /dev. C++11's
315 // std::random_device is instead exposed through a NaCl syscall.
316 # define _LIBCPP_USING_NACL_RANDOM
317 #elif defined(_LIBCPP_WIN32API)
318 # define _LIBCPP_USING_WIN32_RANDOM
320 # define _LIBCPP_USING_DEV_RANDOM
323 #if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
325 # if __BYTE_ORDER == __LITTLE_ENDIAN
326 # define _LIBCPP_LITTLE_ENDIAN
327 # elif __BYTE_ORDER == __BIG_ENDIAN
328 # define _LIBCPP_BIG_ENDIAN
329 # else // __BYTE_ORDER == __BIG_ENDIAN
330 # error unable to determine endian
332 #endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
334 #if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
335 # define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
337 # define _LIBCPP_NO_CFI
340 #if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
341 # if defined(__FreeBSD__)
342 # define _LIBCPP_HAS_ALIGNED_ALLOC
343 # define _LIBCPP_HAS_QUICK_EXIT
344 # define _LIBCPP_HAS_C11_FEATURES
345 # if __FreeBSD_version >= 1300064 || \
346 (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000)
347 # define _LIBCPP_HAS_TIMESPEC_GET
349 # elif defined(__BIONIC__)
350 # define _LIBCPP_HAS_C11_FEATURES
351 # if __ANDROID_API__ >= 21
352 # define _LIBCPP_HAS_QUICK_EXIT
354 # if __ANDROID_API__ >= 28
355 # define _LIBCPP_HAS_ALIGNED_ALLOC
357 # if __ANDROID_API__ >= 29
358 # define _LIBCPP_HAS_TIMESPEC_GET
360 # elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__)
361 # define _LIBCPP_HAS_ALIGNED_ALLOC
362 # define _LIBCPP_HAS_QUICK_EXIT
363 # define _LIBCPP_HAS_TIMESPEC_GET
364 # define _LIBCPP_HAS_C11_FEATURES
365 # elif defined(__linux__)
366 # if !defined(_LIBCPP_HAS_MUSL_LIBC)
367 # if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__)
368 # define _LIBCPP_HAS_QUICK_EXIT
370 # if _LIBCPP_GLIBC_PREREQ(2, 17)
371 # define _LIBCPP_HAS_ALIGNED_ALLOC
372 # define _LIBCPP_HAS_C11_FEATURES
373 # define _LIBCPP_HAS_TIMESPEC_GET
375 # else // defined(_LIBCPP_HAS_MUSL_LIBC)
376 # define _LIBCPP_HAS_ALIGNED_ALLOC
377 # define _LIBCPP_HAS_QUICK_EXIT
378 # define _LIBCPP_HAS_TIMESPEC_GET
379 # define _LIBCPP_HAS_C11_FEATURES
384 #ifndef _LIBCPP_CXX03_LANG
385 # define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
386 #elif defined(_LIBCPP_COMPILER_CLANG)
387 # define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
389 // This definition is potentially buggy, but it's only taken with GCC in C++03,
390 // which we barely support anyway. See llvm.org/PR39713
391 # define _LIBCPP_ALIGNOF(_Tp) __alignof(_Tp)
394 #define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
396 #if defined(_LIBCPP_COMPILER_CLANG)
398 // _LIBCPP_ALTERNATE_STRING_LAYOUT is an old name for
399 // _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT left here for backward compatibility.
400 #if (defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \
401 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)) || \
402 defined(_LIBCPP_ALTERNATE_STRING_LAYOUT)
403 #define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
406 #if __has_feature(cxx_alignas)
407 # define _ALIGNAS_TYPE(x) alignas(x)
408 # define _ALIGNAS(x) alignas(x)
410 # define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
411 # define _ALIGNAS(x) __attribute__((__aligned__(x)))
414 #if __cplusplus < 201103L
415 typedef __char16_t char16_t;
416 typedef __char32_t char32_t;
419 #if !(__has_feature(cxx_exceptions)) && !defined(_LIBCPP_NO_EXCEPTIONS)
420 #define _LIBCPP_NO_EXCEPTIONS
423 #if !(__has_feature(cxx_rtti)) && !defined(_LIBCPP_NO_RTTI)
424 #define _LIBCPP_NO_RTTI
427 #if !(__has_feature(cxx_strong_enums))
428 #define _LIBCPP_HAS_NO_STRONG_ENUMS
431 #if __has_feature(cxx_attributes)
432 # define _LIBCPP_NORETURN [[noreturn]]
434 # define _LIBCPP_NORETURN __attribute__ ((noreturn))
437 #if !(__has_feature(cxx_lambdas))
438 #define _LIBCPP_HAS_NO_LAMBDAS
441 #if !(__has_feature(cxx_nullptr))
442 # if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR)
443 # define nullptr __nullptr
445 # define _LIBCPP_HAS_NO_NULLPTR
449 #if !(__has_feature(cxx_rvalue_references))
450 #define _LIBCPP_HAS_NO_RVALUE_REFERENCES
453 #if !(__has_feature(cxx_auto_type))
454 #define _LIBCPP_HAS_NO_AUTO_TYPE
457 #if !(__has_feature(cxx_variadic_templates))
458 #define _LIBCPP_HAS_NO_VARIADICS
461 // Objective-C++ features (opt-in)
462 #if __has_feature(objc_arc)
463 #define _LIBCPP_HAS_OBJC_ARC
466 #if __has_feature(objc_arc_weak)
467 #define _LIBCPP_HAS_OBJC_ARC_WEAK
470 #if !(__has_feature(cxx_relaxed_constexpr))
471 #define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
474 #if !(__has_feature(cxx_variable_templates))
475 #define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
478 #if !(__has_feature(cxx_noexcept))
479 #define _LIBCPP_HAS_NO_NOEXCEPT
482 #if !defined(_LIBCPP_HAS_NO_ASAN) && !__has_feature(address_sanitizer)
483 #define _LIBCPP_HAS_NO_ASAN
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")))
491 #if __has_builtin(__builtin_launder)
492 #define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
495 #if !__is_identifier(__has_unique_object_representations)
496 #define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
499 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
501 // Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1
502 #if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 800) || \
503 (defined(__apple_build_version__) && __apple_build_version__ < 10010000)
504 #define _LIBCPP_HAS_NO_CXX20_CHRONO_LITERALS
507 #define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
509 #elif defined(_LIBCPP_COMPILER_GCC)
511 #define _ALIGNAS(x) __attribute__((__aligned__(x)))
512 #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
514 #define _LIBCPP_NORETURN __attribute__((noreturn))
516 #if !__EXCEPTIONS && !defined(_LIBCPP_NO_EXCEPTIONS)
517 #define _LIBCPP_NO_EXCEPTIONS
520 // Determine if GCC supports relaxed constexpr
521 #if !defined(__cpp_constexpr) || __cpp_constexpr < 201304L
522 #define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
525 // GCC 5 supports variable templates
526 #if !defined(__cpp_variable_templates) || __cpp_variable_templates < 201304L
527 #define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
530 #if !defined(_LIBCPP_HAS_NO_ASAN) && !defined(__SANITIZE_ADDRESS__)
531 #define _LIBCPP_HAS_NO_ASAN
535 #define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
539 #define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
542 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
544 #define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
546 #elif defined(_LIBCPP_COMPILER_MSVC)
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))
553 #error "MSVC versions prior to Visual Studio 2015 are not supported"
556 #define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
557 #define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
558 #define __alignof__ __alignof
559 #define _LIBCPP_NORETURN __declspec(noreturn)
560 #define _ALIGNAS(x) __declspec(align(x))
561 #define _ALIGNAS_TYPE(x) alignas(x)
565 #define _LIBCPP_HAS_NO_ASAN
567 #define _LIBCPP_ALWAYS_INLINE __forceinline
569 #define _LIBCPP_HAS_NO_VECTOR_EXTENSION
571 #define _LIBCPP_DISABLE_EXTENSION_WARNING
573 #elif defined(_LIBCPP_COMPILER_IBM)
575 #define _ALIGNAS(x) __attribute__((__aligned__(x)))
576 #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
577 #define _ATTRIBUTE(x) __attribute__((x))
578 #define _LIBCPP_NORETURN __attribute__((noreturn))
580 #define _LIBCPP_HAS_NO_UNICODE_CHARS
581 #define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
584 #define __MULTILOCALE_API
587 #define _LIBCPP_HAS_NO_ASAN
589 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
591 #define _LIBCPP_HAS_NO_VECTOR_EXTENSION
593 #define _LIBCPP_DISABLE_EXTENSION_WARNING
595 #endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM]
597 #if defined(_LIBCPP_OBJECT_FORMAT_COFF)
600 # define _LIBCPP_CRT_FUNC __declspec(dllimport)
602 # define _LIBCPP_CRT_FUNC
605 #if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
606 # define _LIBCPP_DLL_VIS
607 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
608 # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
609 # define _LIBCPP_OVERRIDABLE_FUNC_VIS
610 # define _LIBCPP_EXPORTED_FROM_ABI
611 #elif defined(_LIBCPP_BUILDING_LIBRARY)
612 # define _LIBCPP_DLL_VIS __declspec(dllexport)
613 # if defined(__MINGW32__)
614 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
615 # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
617 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
618 # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
620 # define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
621 # define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)
623 # define _LIBCPP_DLL_VIS __declspec(dllimport)
624 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
625 # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
626 # define _LIBCPP_OVERRIDABLE_FUNC_VIS
627 # define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)
630 #define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS
631 #define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
632 #define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
633 #define _LIBCPP_HIDDEN
634 #define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
635 #define _LIBCPP_TEMPLATE_VIS
636 #define _LIBCPP_ENUM_VIS
638 #endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
640 #ifndef _LIBCPP_HIDDEN
641 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
642 # define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
644 # define _LIBCPP_HIDDEN
648 #ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
649 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
650 // The inline should be removed once PR32114 is resolved
651 # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
653 # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
657 #ifndef _LIBCPP_FUNC_VIS
658 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
659 # define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
661 # define _LIBCPP_FUNC_VIS
665 #ifndef _LIBCPP_TYPE_VIS
666 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
667 # define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
669 # define _LIBCPP_TYPE_VIS
673 #ifndef _LIBCPP_TEMPLATE_VIS
674 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
675 # if __has_attribute(__type_visibility__)
676 # define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default")))
678 # define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default")))
681 # define _LIBCPP_TEMPLATE_VIS
685 #ifndef _LIBCPP_EXPORTED_FROM_ABI
686 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
687 # define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default")))
689 # define _LIBCPP_EXPORTED_FROM_ABI
693 #ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
694 #define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS
697 #ifndef _LIBCPP_EXCEPTION_ABI
698 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
699 # define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
701 # define _LIBCPP_EXCEPTION_ABI
705 #ifndef _LIBCPP_ENUM_VIS
706 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
707 # define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default")))
709 # define _LIBCPP_ENUM_VIS
713 #ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
714 # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
715 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default")))
717 # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
721 #ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
722 #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
725 #if __has_attribute(internal_linkage)
726 # define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage))
728 # define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE
731 #if __has_attribute(exclude_from_explicit_instantiation)
732 # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__))
734 // Try to approximate the effect of exclude_from_explicit_instantiation
735 // (which is that entities are not assumed to be provided by explicit
736 // template instantiations in the dylib) by always inlining those entities.
737 # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE
740 #ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU
741 # ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT
742 # define _LIBCPP_HIDE_FROM_ABI_PER_TU 0
744 # define _LIBCPP_HIDE_FROM_ABI_PER_TU 1
748 #ifndef _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT
749 # ifdef _LIBCPP_OBJECT_FORMAT_COFF // Windows binaries can't merge typeinfos.
750 # define _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT 0
752 // TODO: This isn't strictly correct on ELF platforms due to llvm.org/PR37398
753 // And we should consider defaulting to OFF.
754 # define _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT 1
758 #ifndef _LIBCPP_HIDE_FROM_ABI
759 # if _LIBCPP_HIDE_FROM_ABI_PER_TU
760 # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE
762 # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
766 #ifdef _LIBCPP_BUILDING_LIBRARY
767 # if _LIBCPP_ABI_VERSION > 1
768 # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
770 # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
773 # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
776 // Just so we can migrate to the new macros gradually.
777 #define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
779 // Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
780 #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
781 #define _LIBCPP_END_NAMESPACE_STD } }
782 #define _VSTD std::_LIBCPP_ABI_NAMESPACE
783 _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
785 #if _LIBCPP_STD_VER >= 17
786 #define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
787 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
789 #define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
790 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
793 #define _LIBCPP_END_NAMESPACE_FILESYSTEM \
794 _LIBCPP_END_NAMESPACE_STD } }
796 #define _VSTD_FS _VSTD::__fs::filesystem
798 #ifndef _LIBCPP_PREFERRED_OVERLOAD
799 # if __has_attribute(__enable_if__)
800 # define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, "")))
804 #ifndef _LIBCPP_HAS_NO_NOEXCEPT
805 # define _NOEXCEPT noexcept
806 # define _NOEXCEPT_(x) noexcept(x)
808 # define _NOEXCEPT throw()
809 # define _NOEXCEPT_(x)
812 #ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
813 typedef unsigned short char16_t;
814 typedef unsigned int char32_t;
815 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS
817 #ifndef __SIZEOF_INT128__
818 #define _LIBCPP_HAS_NO_INT128
821 #ifdef _LIBCPP_CXX03_LANG
822 # define static_assert(...) _Static_assert(__VA_ARGS__)
823 # define decltype(...) __decltype(__VA_ARGS__)
824 #endif // _LIBCPP_CXX03_LANG
826 #ifdef _LIBCPP_CXX03_LANG
827 # define _LIBCPP_CONSTEXPR
829 # define _LIBCPP_CONSTEXPR constexpr
832 #ifdef _LIBCPP_CXX03_LANG
833 # define _LIBCPP_DEFAULT {}
835 # define _LIBCPP_DEFAULT = default;
838 #ifdef _LIBCPP_CXX03_LANG
839 # define _LIBCPP_EQUAL_DELETE
841 # define _LIBCPP_EQUAL_DELETE = delete
845 # define _LIBCPP_NOALIAS __attribute__((__malloc__))
847 # define _LIBCPP_NOALIAS
850 #if __has_feature(cxx_explicit_conversions) || defined(__IBMCPP__) || \
851 (!defined(_LIBCPP_CXX03_LANG) && defined(__GNUC__)) // All supported GCC versions
852 # define _LIBCPP_EXPLICIT explicit
854 # define _LIBCPP_EXPLICIT
857 #if !__has_builtin(__builtin_operator_new) || !__has_builtin(__builtin_operator_delete)
858 #define _LIBCPP_HAS_NO_BUILTIN_OPERATOR_NEW_DELETE
861 #ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
862 # define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
863 # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
865 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \
866 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
867 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \
869 #else // _LIBCPP_HAS_NO_STRONG_ENUMS
870 # define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
871 # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
872 #endif // _LIBCPP_HAS_NO_STRONG_ENUMS
875 # if _LIBCPP_DEBUG == 0
876 # define _LIBCPP_DEBUG_LEVEL 1
877 # elif _LIBCPP_DEBUG == 1
878 # define _LIBCPP_DEBUG_LEVEL 2
880 # error Supported values for _LIBCPP_DEBUG are 0 and 1
882 # if !defined(_LIBCPP_BUILDING_LIBRARY)
883 # define _LIBCPP_EXTERN_TEMPLATE(...)
887 #ifndef _LIBCPP_DEBUG_LEVEL
888 # define _LIBCPP_DEBUG_LEVEL 0
891 #ifdef _LIBCPP_DISABLE_EXTERN_TEMPLATE
892 #define _LIBCPP_EXTERN_TEMPLATE(...)
893 #define _LIBCPP_EXTERN_TEMPLATE2(...)
896 #ifndef _LIBCPP_EXTERN_TEMPLATE
897 #define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
900 #ifndef _LIBCPP_EXTERN_TEMPLATE2
901 #define _LIBCPP_EXTERN_TEMPLATE2(...) extern template __VA_ARGS__;
904 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \
905 defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__)
906 #define _LIBCPP_LOCALE__L_EXTENSIONS 1
909 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
910 // Most unix variants have catopen. These are the specific ones that don't.
911 # if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION)
912 # define _LIBCPP_HAS_CATOPEN 1
917 #define _DECLARE_C99_LDBL_MATH 1
920 // If we are getting operator new from the MSVC CRT, then allocation overloads
921 // for align_val_t were added in 19.12, aka VS 2017 version 15.3.
922 #if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
923 # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
924 #elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
925 // We're deferring to Microsoft's STL to provide aligned new et al. We don't
926 // have it unless the language feature test macro is defined.
927 # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
930 #if defined(__APPLE__)
931 # if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
932 defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
933 # define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
935 #endif // defined(__APPLE__)
937 #if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \
938 (defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \
939 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606))
940 # define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
943 #if defined(__APPLE__) || defined(__FreeBSD__)
944 #define _LIBCPP_HAS_DEFAULTRUNELOCALE
947 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
948 #define _LIBCPP_WCTYPE_IS_MASK
951 #if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
952 #define _LIBCPP_NO_HAS_CHAR8_T
955 // Deprecation macros.
957 // Deprecations warnings are always enabled, except when users explicitly opt-out
958 // by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.
959 #if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
960 # if __has_attribute(deprecated)
961 # define _LIBCPP_DEPRECATED __attribute__ ((deprecated))
962 # elif _LIBCPP_STD_VER > 11
963 # define _LIBCPP_DEPRECATED [[deprecated]]
965 # define _LIBCPP_DEPRECATED
968 # define _LIBCPP_DEPRECATED
971 #if !defined(_LIBCPP_CXX03_LANG)
972 # define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
974 # define _LIBCPP_DEPRECATED_IN_CXX11
977 #if _LIBCPP_STD_VER >= 14
978 # define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
980 # define _LIBCPP_DEPRECATED_IN_CXX14
983 #if _LIBCPP_STD_VER >= 17
984 # define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
986 # define _LIBCPP_DEPRECATED_IN_CXX17
989 // Macros to enter and leave a state where deprecation warnings are suppressed.
990 #if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) && \
991 (defined(_LIBCPP_COMPILER_CLANG) || defined(_LIBCPP_COMPILER_GCC))
992 # define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
993 _Pragma("GCC diagnostic push") \
994 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"")
995 # define _LIBCPP_SUPPRESS_DEPRECATED_POP \
996 _Pragma("GCC diagnostic pop")
998 #if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH)
999 # define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
1000 # define _LIBCPP_SUPPRESS_DEPRECATED_POP
1003 #if _LIBCPP_STD_VER <= 11
1004 # define _LIBCPP_EXPLICIT_AFTER_CXX11
1006 # define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
1009 #if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1010 # define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
1012 # define _LIBCPP_CONSTEXPR_AFTER_CXX11
1015 #if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1016 # define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr
1018 # define _LIBCPP_CONSTEXPR_AFTER_CXX14
1021 #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1022 # define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr
1024 # define _LIBCPP_CONSTEXPR_AFTER_CXX17
1027 #if _LIBCPP_STD_VER > 17 && \
1028 !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) && \
1029 !defined(_LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED)
1030 # define _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED constexpr
1032 # define _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
1035 // The _LIBCPP_NODISCARD_ATTRIBUTE should only be used to define other
1036 // NODISCARD macros to the correct attribute.
1037 #if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC)
1038 # define _LIBCPP_NODISCARD_ATTRIBUTE [[nodiscard]]
1039 #elif defined(_LIBCPP_COMPILER_CLANG) && !defined(_LIBCPP_CXX03_LANG)
1040 # define _LIBCPP_NODISCARD_ATTRIBUTE [[clang::warn_unused_result]]
1042 // We can't use GCC's [[gnu::warn_unused_result]] and
1043 // __attribute__((warn_unused_result)), because GCC does not silence them via
1045 # define _LIBCPP_NODISCARD_ATTRIBUTE
1048 // _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not
1049 // specified as such as an extension.
1050 #if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
1051 # define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD_ATTRIBUTE
1053 # define _LIBCPP_NODISCARD_EXT
1056 #if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \
1057 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD))
1058 # define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD_ATTRIBUTE
1060 # define _LIBCPP_NODISCARD_AFTER_CXX17
1063 #if _LIBCPP_STD_VER > 14 && defined(__cpp_inline_variables) && (__cpp_inline_variables >= 201606L)
1064 # define _LIBCPP_INLINE_VAR inline
1066 # define _LIBCPP_INLINE_VAR
1069 #ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1070 # define _LIBCPP_EXPLICIT_MOVE(x) _VSTD::move(x)
1072 # define _LIBCPP_EXPLICIT_MOVE(x) (x)
1075 #ifndef _LIBCPP_CONSTEXPR_IF_NODEBUG
1076 #if defined(_LIBCPP_DEBUG) || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1077 #define _LIBCPP_CONSTEXPR_IF_NODEBUG
1079 #define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr
1083 #if __has_attribute(no_destroy)
1084 # define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__))
1086 # define _LIBCPP_NO_DESTROY
1089 #ifndef _LIBCPP_HAS_NO_ASAN
1090 _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
1091 const void *, const void *, const void *, const void *);
1094 // Try to find out if RTTI is disabled.
1095 // g++ and cl.exe have RTTI on by default and define a macro when it is.
1096 // g++ only defines the macro in 4.3.2 and onwards.
1097 #if !defined(_LIBCPP_NO_RTTI)
1098 # if defined(__GNUC__) && \
1099 ((__GNUC__ >= 5) || \
1100 (__GNUC__ == 4 && (__GNUC_MINOR__ >= 3 || __GNUC_PATCHLEVEL__ >= 2))) && \
1101 !defined(__GXX_RTTI)
1102 # define _LIBCPP_NO_RTTI
1103 # elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI)
1104 # define _LIBCPP_NO_RTTI
1108 #ifndef _LIBCPP_WEAK
1109 #define _LIBCPP_WEAK __attribute__((__weak__))
1113 #if !defined(_LIBCPP_HAS_NO_THREADS) && \
1114 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
1115 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \
1116 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
1117 # if defined(__FreeBSD__) || \
1118 defined(__wasi__) || \
1119 defined(__NetBSD__) || \
1120 defined(__linux__) || \
1121 defined(__GNU__) || \
1122 defined(__APPLE__) || \
1123 defined(__CloudABI__) || \
1124 defined(__sun__) || \
1125 (defined(__MINGW32__) && __has_include(<pthread.h>))
1126 # define _LIBCPP_HAS_THREAD_API_PTHREAD
1127 # elif defined(__Fuchsia__)
1128 # define _LIBCPP_HAS_THREAD_API_C11
1129 # elif defined(_LIBCPP_WIN32API)
1130 # define _LIBCPP_HAS_THREAD_API_WIN32
1132 # error "No thread API"
1133 # endif // _LIBCPP_HAS_THREAD_API
1134 #endif // _LIBCPP_HAS_NO_THREADS
1136 #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
1137 #if defined(__ANDROID__) && __ANDROID_API__ >= 30
1138 #define _LIBCPP_HAS_COND_CLOCKWAIT
1139 #elif defined(_LIBCPP_GLIBC_PREREQ)
1140 #if _LIBCPP_GLIBC_PREREQ(2, 30)
1141 #define _LIBCPP_HAS_COND_CLOCKWAIT
1146 #if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
1147 #error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
1148 _LIBCPP_HAS_NO_THREADS is not defined.
1151 #if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
1152 #error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
1153 _LIBCPP_HAS_NO_THREADS is defined.
1156 #if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
1157 #error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
1158 _LIBCPP_HAS_NO_THREADS is defined.
1161 #if defined(__STDCPP_THREADS__) && defined(_LIBCPP_HAS_NO_THREADS)
1162 #error _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set.
1165 #if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
1166 #define __STDCPP_THREADS__ 1
1169 // The glibc and Bionic implementation of pthreads implements
1170 // pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
1171 // mutexes have no destroy mechanism.
1173 // This optimization can't be performed on Apple platforms, where
1174 // pthread_mutex_destroy can allow the kernel to release resources.
1175 // See https://llvm.org/D64298 for details.
1177 // TODO(EricWF): Enable this optimization on Bionic after speaking to their
1178 // respective stakeholders.
1179 #if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \
1180 || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \
1181 || defined(_LIBCPP_HAS_THREAD_API_WIN32)
1182 # define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
1185 // Destroying a condvar is a nop on Windows.
1187 // This optimization can't be performed on Apple platforms, where
1188 // pthread_cond_destroy can allow the kernel to release resources.
1189 // See https://llvm.org/D64298 for details.
1191 // TODO(EricWF): This is potentially true for some pthread implementations
1193 #if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \
1194 defined(_LIBCPP_HAS_THREAD_API_WIN32)
1195 # define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
1198 // Systems that use capability-based security (FreeBSD with Capsicum,
1199 // Nuxi CloudABI) may only provide local filesystem access (using *at()).
1200 // Functions like open(), rename(), unlink() and stat() should not be
1201 // used, as they attempt to access the global filesystem namespace.
1203 #define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1206 // CloudABI is intended for running networked services. Processes do not
1207 // have standard input and output channels.
1209 #define _LIBCPP_HAS_NO_STDIN
1210 #define _LIBCPP_HAS_NO_STDOUT
1213 // Some systems do not provide gets() in their C library, for security reasons.
1214 #ifndef _LIBCPP_C_HAS_NO_GETS
1215 # if defined(_LIBCPP_MSVCRT) || \
1216 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043)
1217 # define _LIBCPP_C_HAS_NO_GETS
1221 #if defined(__BIONIC__) || defined(__CloudABI__) || \
1222 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC)
1223 #define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
1226 // Thread-unsafe functions such as strtok() and localtime()
1227 // are not available.
1229 #define _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
1232 #if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
1233 # define _LIBCPP_HAS_C_ATOMIC_IMP
1234 #elif defined(_LIBCPP_COMPILER_GCC)
1235 # define _LIBCPP_HAS_GCC_ATOMIC_IMP
1238 #if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \
1239 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \
1240 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)) \
1241 || defined(_LIBCPP_HAS_NO_THREADS)
1242 # define _LIBCPP_HAS_NO_ATOMIC_HEADER
1244 # ifndef _LIBCPP_ATOMIC_FLAG_TYPE
1245 # define _LIBCPP_ATOMIC_FLAG_TYPE bool
1247 # ifdef _LIBCPP_FREESTANDING
1248 # define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS
1252 #ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
1253 #define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
1256 #if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS)
1257 # if defined(__clang__) && __has_attribute(acquire_capability)
1258 // Work around the attribute handling in clang. When both __declspec and
1259 // __attribute__ are present, the processing goes awry preventing the definition
1261 # if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
1262 # define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
1267 #ifndef _LIBCPP_THREAD_SAFETY_ANNOTATION
1268 # ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
1269 # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x))
1271 # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
1273 #endif // _LIBCPP_THREAD_SAFETY_ANNOTATION
1275 #if __has_attribute(require_constant_initialization)
1276 # define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__))
1278 # define _LIBCPP_SAFE_STATIC
1281 #if !__has_builtin(__builtin_addressof) && _GNUC_VER < 700
1282 #define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF
1285 #if !__has_builtin(__builtin_is_constant_evaluated) && _GNUC_VER < 900
1286 #define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED
1289 #if !defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
1290 # if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION)
1291 # define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS
1295 #if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS)
1296 # define _LIBCPP_DIAGNOSE_WARNING(...) \
1297 __attribute__((diagnose_if(__VA_ARGS__, "warning")))
1298 # define _LIBCPP_DIAGNOSE_ERROR(...) \
1299 __attribute__((diagnose_if(__VA_ARGS__, "error")))
1301 # define _LIBCPP_DIAGNOSE_WARNING(...)
1302 # define _LIBCPP_DIAGNOSE_ERROR(...)
1305 // Use a function like macro to imply that it must be followed by a semicolon
1306 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
1307 # define _LIBCPP_FALLTHROUGH() [[fallthrough]]
1308 #elif __has_cpp_attribute(clang::fallthrough)
1309 # define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]]
1310 #elif __has_attribute(fallthrough) || _GNUC_VER >= 700
1311 # define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
1313 # define _LIBCPP_FALLTHROUGH() ((void)0)
1316 #if __has_attribute(__nodebug__)
1317 #define _LIBCPP_NODEBUG __attribute__((__nodebug__))
1319 #define _LIBCPP_NODEBUG
1322 #ifndef _LIBCPP_NODEBUG_TYPE
1323 #if __has_attribute(__nodebug__) && \
1324 (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 900)
1325 #define _LIBCPP_NODEBUG_TYPE __attribute__((nodebug))
1327 #define _LIBCPP_NODEBUG_TYPE
1329 #endif // !defined(_LIBCPP_NODEBUG_TYPE)
1331 #if defined(_LIBCPP_ABI_MICROSOFT) && \
1332 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases))
1333 # define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
1335 # define _LIBCPP_DECLSPEC_EMPTY_BASES
1338 #if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
1339 #define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
1340 #define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
1341 #define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
1342 #define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
1343 #endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
1345 #if !defined(__cpp_deduction_guides) || __cpp_deduction_guides < 201611
1346 #define _LIBCPP_HAS_NO_DEDUCTION_GUIDES
1349 #if !__has_keyword(__is_aggregate) && (_GNUC_VER_NEW < 7001)
1350 #define _LIBCPP_HAS_NO_IS_AGGREGATE
1353 #if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L
1354 #define _LIBCPP_HAS_NO_COROUTINES
1357 #if !defined(__cpp_impl_three_way_comparison) || __cpp_impl_three_way_comparison < 201907L
1358 #define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR
1361 // Decide whether to use availability macros.
1362 #if !defined(_LIBCPP_BUILDING_LIBRARY) && \
1363 !defined(_LIBCPP_DISABLE_AVAILABILITY) && \
1364 __has_feature(attribute_availability_with_strict) && \
1365 __has_feature(attribute_availability_in_templates) && \
1366 __has_extension(pragma_clang_attribute_external_declaration)
1368 # define _LIBCPP_USE_AVAILABILITY_APPLE
1372 // Define availability macros.
1373 #if defined(_LIBCPP_USE_AVAILABILITY_APPLE)
1374 # define _LIBCPP_AVAILABILITY_SHARED_MUTEX \
1375 __attribute__((availability(macosx,strict,introduced=10.12))) \
1376 __attribute__((availability(ios,strict,introduced=10.0))) \
1377 __attribute__((availability(tvos,strict,introduced=10.0))) \
1378 __attribute__((availability(watchos,strict,introduced=3.0)))
1379 # define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS \
1380 __attribute__((availability(macosx,strict,introduced=10.14))) \
1381 __attribute__((availability(ios,strict,introduced=12.0))) \
1382 __attribute__((availability(tvos,strict,introduced=12.0))) \
1383 __attribute__((availability(watchos,strict,introduced=5.0)))
1384 # define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS \
1385 _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1386 # define _LIBCPP_AVAILABILITY_BAD_ANY_CAST \
1387 _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1388 # define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS \
1389 __attribute__((availability(macosx,strict,introduced=10.12))) \
1390 __attribute__((availability(ios,strict,introduced=10.0))) \
1391 __attribute__((availability(tvos,strict,introduced=10.0))) \
1392 __attribute__((availability(watchos,strict,introduced=3.0)))
1393 # define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE \
1394 __attribute__((availability(macosx,strict,introduced=10.12))) \
1395 __attribute__((availability(ios,strict,introduced=10.0))) \
1396 __attribute__((availability(tvos,strict,introduced=10.0))) \
1397 __attribute__((availability(watchos,strict,introduced=3.0)))
1398 # define _LIBCPP_AVAILABILITY_FUTURE_ERROR \
1399 __attribute__((availability(ios,strict,introduced=6.0)))
1400 # define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE \
1401 __attribute__((availability(macosx,strict,introduced=10.9))) \
1402 __attribute__((availability(ios,strict,introduced=7.0)))
1403 # define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY \
1404 __attribute__((availability(macosx,strict,introduced=10.9))) \
1405 __attribute__((availability(ios,strict,introduced=7.0)))
1406 # define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR \
1407 __attribute__((availability(macosx,strict,introduced=10.9))) \
1408 __attribute__((availability(ios,strict,introduced=7.0)))
1409 # define _LIBCPP_AVAILABILITY_FILESYSTEM \
1410 __attribute__((availability(macosx,strict,introduced=10.15))) \
1411 __attribute__((availability(ios,strict,introduced=13.0))) \
1412 __attribute__((availability(tvos,strict,introduced=13.0))) \
1413 __attribute__((availability(watchos,strict,introduced=6.0)))
1414 # define _LIBCPP_AVAILABILITY_FILESYSTEM_PUSH \
1415 _Pragma("clang attribute push(__attribute__((availability(macosx,strict,introduced=10.15))), apply_to=any(function,record))") \
1416 _Pragma("clang attribute push(__attribute__((availability(ios,strict,introduced=13.0))), apply_to=any(function,record))") \
1417 _Pragma("clang attribute push(__attribute__((availability(tvos,strict,introduced=13.0))), apply_to=any(function,record))") \
1418 _Pragma("clang attribute push(__attribute__((availability(watchos,strict,introduced=6.0))), apply_to=any(function,record))")
1419 # define _LIBCPP_AVAILABILITY_FILESYSTEM_POP \
1420 _Pragma("clang attribute pop") \
1421 _Pragma("clang attribute pop") \
1422 _Pragma("clang attribute pop") \
1423 _Pragma("clang attribute pop")
1425 # define _LIBCPP_AVAILABILITY_SHARED_MUTEX
1426 # define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS
1427 # define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1428 # define _LIBCPP_AVAILABILITY_BAD_ANY_CAST
1429 # define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS
1430 # define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE
1431 # define _LIBCPP_AVAILABILITY_FUTURE_ERROR
1432 # define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE
1433 # define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY
1434 # define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
1435 # define _LIBCPP_AVAILABILITY_FILESYSTEM
1436 # define _LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
1437 # define _LIBCPP_AVAILABILITY_FILESYSTEM_POP
1440 // Define availability that depends on _LIBCPP_NO_EXCEPTIONS.
1441 #ifdef _LIBCPP_NO_EXCEPTIONS
1442 # define _LIBCPP_AVAILABILITY_FUTURE
1443 # define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
1444 # define _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS
1445 # define _LIBCPP_AVAILABILITY_THROW_BAD_VARIANT_ACCESS
1447 # define _LIBCPP_AVAILABILITY_FUTURE _LIBCPP_AVAILABILITY_FUTURE_ERROR
1448 # define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST _LIBCPP_AVAILABILITY_BAD_ANY_CAST
1449 # define _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1450 # define _LIBCPP_AVAILABILITY_THROW_BAD_VARIANT_ACCESS _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS
1453 // The stream API was dropped and re-added in the dylib shipped on macOS
1454 // and iOS. We can only assume the dylib to provide these definitions for
1455 // macosx >= 10.9 and ios >= 7.0. Otherwise, the definitions are available
1456 // from the headers, but not from the dylib. Explicit instantiation
1457 // declarations for streams exist conditionally to this; if we provide
1458 // an explicit instantiation declaration and we try to deploy to a dylib
1459 // that does not provide those symbols, we'll get a load-time error.
1460 #if !defined(_LIBCPP_BUILDING_LIBRARY) && \
1461 ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
1462 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1090) || \
1463 (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \
1464 __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 70000))
1465 # define _LIBCPP_DO_NOT_ASSUME_STREAMS_EXPLICIT_INSTANTIATION_IN_DYLIB
1468 #if defined(_LIBCPP_COMPILER_IBM)
1469 #define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO
1472 #if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
1473 # define _LIBCPP_PUSH_MACROS
1474 # define _LIBCPP_POP_MACROS
1476 // Don't warn about macro conflicts when we can restore them at the
1477 // end of the header.
1478 # ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
1479 # define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
1481 # if defined(_LIBCPP_COMPILER_MSVC)
1482 # define _LIBCPP_PUSH_MACROS \
1483 __pragma(push_macro("min")) \
1484 __pragma(push_macro("max"))
1485 # define _LIBCPP_POP_MACROS \
1486 __pragma(pop_macro("min")) \
1487 __pragma(pop_macro("max"))
1489 # define _LIBCPP_PUSH_MACROS \
1490 _Pragma("push_macro(\"min\")") \
1491 _Pragma("push_macro(\"max\")")
1492 # define _LIBCPP_POP_MACROS \
1493 _Pragma("pop_macro(\"min\")") \
1494 _Pragma("pop_macro(\"max\")")
1496 #endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
1498 #ifndef _LIBCPP_NO_AUTO_LINK
1499 # if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
1501 # pragma comment(lib, "c++.lib")
1503 # pragma comment(lib, "libc++.lib")
1505 # endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
1506 #endif // _LIBCPP_NO_AUTO_LINK
1508 #define _LIBCPP_UNUSED_VAR(x) ((void)(x))
1510 // Configures the fopen close-on-exec mode character, if any. This string will
1511 // be appended to any mode string used by fstream for fopen/fdopen.
1513 // Not all platforms support this, but it helps avoid fd-leaks on platforms that
1515 #if defined(__BIONIC__)
1516 # define _LIBCPP_FOPEN_CLOEXEC_MODE "e"
1518 # define _LIBCPP_FOPEN_CLOEXEC_MODE
1521 #endif // __cplusplus
1523 #endif // _LIBCPP_CONFIG