1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_ANY 11#define _LIBCPP_ANY 12 13/* 14 any synopsis 15 16namespace std { 17 18 class bad_any_cast : public bad_cast 19 { 20 public: 21 virtual const char* what() const noexcept; 22 }; 23 24 class any 25 { 26 public: 27 28 // 6.3.1 any construct/destruct 29 any() noexcept; 30 31 any(const any& other); 32 any(any&& other) noexcept; 33 34 template <class ValueType> 35 any(ValueType&& value); 36 37 ~any(); 38 39 // 6.3.2 any assignments 40 any& operator=(const any& rhs); 41 any& operator=(any&& rhs) noexcept; 42 43 template <class ValueType> 44 any& operator=(ValueType&& rhs); 45 46 // 6.3.3 any modifiers 47 template <class ValueType, class... Args> 48 decay_t<ValueType>& emplace(Args&&... args); 49 template <class ValueType, class U, class... Args> 50 decay_t<ValueType>& emplace(initializer_list<U>, Args&&...); 51 void reset() noexcept; 52 void swap(any& rhs) noexcept; 53 54 // 6.3.4 any observers 55 bool has_value() const noexcept; 56 const type_info& type() const noexcept; 57 }; 58 59 // 6.4 Non-member functions 60 void swap(any& x, any& y) noexcept; 61 62 template <class T, class ...Args> 63 any make_any(Args&& ...args); 64 template <class T, class U, class ...Args> 65 any make_any(initializer_list<U>, Args&& ...args); 66 67 template<class ValueType> 68 ValueType any_cast(const any& operand); 69 template<class ValueType> 70 ValueType any_cast(any& operand); 71 template<class ValueType> 72 ValueType any_cast(any&& operand); 73 74 template<class ValueType> 75 const ValueType* any_cast(const any* operand) noexcept; 76 template<class ValueType> 77 ValueType* any_cast(any* operand) noexcept; 78 79} // namespace std 80 81*/ 82 83#include <__config> 84#include <__memory/allocator.h> 85#include <__memory/allocator_destructor.h> 86#include <__memory/allocator_traits.h> 87#include <__memory/unique_ptr.h> 88#include <__type_traits/add_cv_quals.h> 89#include <__type_traits/add_pointer.h> 90#include <__type_traits/aligned_storage.h> 91#include <__type_traits/conditional.h> 92#include <__type_traits/decay.h> 93#include <__type_traits/enable_if.h> 94#include <__type_traits/is_constructible.h> 95#include <__type_traits/is_function.h> 96#include <__type_traits/is_nothrow_constructible.h> 97#include <__type_traits/is_reference.h> 98#include <__type_traits/is_same.h> 99#include <__type_traits/is_void.h> 100#include <__type_traits/remove_cv.h> 101#include <__type_traits/remove_cvref.h> 102#include <__type_traits/remove_reference.h> 103#include <__utility/forward.h> 104#include <__utility/in_place.h> 105#include <__utility/move.h> 106#include <__utility/unreachable.h> 107#include <__verbose_abort> 108#include <initializer_list> 109#include <typeinfo> 110#include <version> 111 112#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 113# pragma GCC system_header 114#endif 115 116_LIBCPP_PUSH_MACROS 117#include <__undef_macros> 118 119namespace std { 120class _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_AVAILABILITY_BAD_ANY_CAST bad_any_cast : public bad_cast { 121public: 122 const char* what() const _NOEXCEPT override; 123}; 124} // namespace std 125 126_LIBCPP_BEGIN_NAMESPACE_STD 127 128#if _LIBCPP_STD_VER >= 17 129 130[[noreturn]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST void __throw_bad_any_cast() { 131# if _LIBCPP_HAS_EXCEPTIONS 132 throw bad_any_cast(); 133# else 134 _LIBCPP_VERBOSE_ABORT("bad_any_cast was thrown in -fno-exceptions mode"); 135# endif 136} 137 138// Forward declarations 139class _LIBCPP_TEMPLATE_VIS any; 140 141template <class _ValueType> 142_LIBCPP_HIDE_FROM_ABI add_pointer_t<add_const_t<_ValueType>> any_cast(any const*) _NOEXCEPT; 143 144template <class _ValueType> 145_LIBCPP_HIDE_FROM_ABI add_pointer_t<_ValueType> any_cast(any*) _NOEXCEPT; 146 147namespace __any_imp { 148_LIBCPP_SUPPRESS_DEPRECATED_PUSH 149using _Buffer = aligned_storage_t<3 * sizeof(void*), alignof(void*)>; 150_LIBCPP_SUPPRESS_DEPRECATED_POP 151 152template <class _Tp> 153using _IsSmallObject = 154 integral_constant<bool, 155 sizeof(_Tp) <= sizeof(_Buffer) && alignof(_Buffer) % alignof(_Tp) == 0 && 156 is_nothrow_move_constructible<_Tp>::value >; 157 158enum class _Action { _Destroy, _Copy, _Move, _Get, _TypeInfo }; 159 160template <class _Tp> 161struct _SmallHandler; 162template <class _Tp> 163struct _LargeHandler; 164 165template <class _Tp> 166struct _LIBCPP_TEMPLATE_VIS __unique_typeinfo { 167 static constexpr int __id = 0; 168}; 169 170template <class _Tp> 171inline _LIBCPP_HIDE_FROM_ABI constexpr const void* __get_fallback_typeid() { 172 return &__unique_typeinfo<remove_cv_t<remove_reference_t<_Tp>>>::__id; 173} 174 175template <class _Tp> 176inline _LIBCPP_HIDE_FROM_ABI bool __compare_typeid(type_info const* __id, const void* __fallback_id) { 177# if _LIBCPP_HAS_RTTI 178 if (__id && *__id == typeid(_Tp)) 179 return true; 180# endif 181 return !__id && __fallback_id == __any_imp::__get_fallback_typeid<_Tp>(); 182} 183 184template <class _Tp> 185using _Handler = conditional_t< _IsSmallObject<_Tp>::value, _SmallHandler<_Tp>, _LargeHandler<_Tp>>; 186 187} // namespace __any_imp 188 189class _LIBCPP_TEMPLATE_VIS any { 190public: 191 // construct/destruct 192 _LIBCPP_HIDE_FROM_ABI constexpr any() _NOEXCEPT : __h_(nullptr) {} 193 194 _LIBCPP_HIDE_FROM_ABI any(any const& __other) : __h_(nullptr) { 195 if (__other.__h_) 196 __other.__call(_Action::_Copy, this); 197 } 198 199 _LIBCPP_HIDE_FROM_ABI any(any&& __other) _NOEXCEPT : __h_(nullptr) { 200 if (__other.__h_) 201 __other.__call(_Action::_Move, this); 202 } 203 204 template < class _ValueType, 205 class _Tp = decay_t<_ValueType>, 206 class = enable_if_t< !is_same<_Tp, any>::value && !__is_inplace_type<_ValueType>::value && 207 is_copy_constructible<_Tp>::value> > 208 _LIBCPP_HIDE_FROM_ABI any(_ValueType&& __value); 209 210 template <class _ValueType, 211 class... _Args, 212 class _Tp = decay_t<_ValueType>, 213 class = enable_if_t< is_constructible<_Tp, _Args...>::value && is_copy_constructible<_Tp>::value > > 214 _LIBCPP_HIDE_FROM_ABI explicit any(in_place_type_t<_ValueType>, _Args&&... __args); 215 216 template <class _ValueType, 217 class _Up, 218 class... _Args, 219 class _Tp = decay_t<_ValueType>, 220 class = enable_if_t< is_constructible<_Tp, initializer_list<_Up>&, _Args...>::value && 221 is_copy_constructible<_Tp>::value> > 222 _LIBCPP_HIDE_FROM_ABI explicit any(in_place_type_t<_ValueType>, initializer_list<_Up>, _Args&&... __args); 223 224 _LIBCPP_HIDE_FROM_ABI ~any() { this->reset(); } 225 226 // assignments 227 _LIBCPP_HIDE_FROM_ABI any& operator=(any const& __rhs) { 228 any(__rhs).swap(*this); 229 return *this; 230 } 231 232 _LIBCPP_HIDE_FROM_ABI any& operator=(any&& __rhs) _NOEXCEPT { 233 any(std::move(__rhs)).swap(*this); 234 return *this; 235 } 236 237 template < class _ValueType, 238 class _Tp = decay_t<_ValueType>, 239 class = enable_if_t< !is_same<_Tp, any>::value && is_copy_constructible<_Tp>::value> > 240 _LIBCPP_HIDE_FROM_ABI any& operator=(_ValueType&& __rhs); 241 242 template <class _ValueType, 243 class... _Args, 244 class _Tp = decay_t<_ValueType>, 245 class = enable_if_t< is_constructible<_Tp, _Args...>::value && is_copy_constructible<_Tp>::value> > 246 _LIBCPP_HIDE_FROM_ABI _Tp& emplace(_Args&&...); 247 248 template <class _ValueType, 249 class _Up, 250 class... _Args, 251 class _Tp = decay_t<_ValueType>, 252 class = enable_if_t< is_constructible<_Tp, initializer_list<_Up>&, _Args...>::value && 253 is_copy_constructible<_Tp>::value> > 254 _LIBCPP_HIDE_FROM_ABI _Tp& emplace(initializer_list<_Up>, _Args&&...); 255 256 // 6.3.3 any modifiers 257 _LIBCPP_HIDE_FROM_ABI void reset() _NOEXCEPT { 258 if (__h_) 259 this->__call(_Action::_Destroy); 260 } 261 262 _LIBCPP_HIDE_FROM_ABI void swap(any& __rhs) _NOEXCEPT; 263 264 // 6.3.4 any observers 265 _LIBCPP_HIDE_FROM_ABI bool has_value() const _NOEXCEPT { return __h_ != nullptr; } 266 267# if _LIBCPP_HAS_RTTI 268 _LIBCPP_HIDE_FROM_ABI const type_info& type() const _NOEXCEPT { 269 if (__h_) { 270 return *static_cast<type_info const*>(this->__call(_Action::_TypeInfo)); 271 } else { 272 return typeid(void); 273 } 274 } 275# endif 276 277private: 278 typedef __any_imp::_Action _Action; 279 using _HandleFuncPtr = void* (*)(_Action, any const*, any*, const type_info*, const void* __fallback_info); 280 281 union _Storage { 282 _LIBCPP_HIDE_FROM_ABI constexpr _Storage() : __ptr(nullptr) {} 283 void* __ptr; 284 __any_imp::_Buffer __buf; 285 }; 286 287 _LIBCPP_HIDE_FROM_ABI void* 288 __call(_Action __a, any* __other = nullptr, type_info const* __info = nullptr, const void* __fallback_info = nullptr) 289 const { 290 return __h_(__a, this, __other, __info, __fallback_info); 291 } 292 293 _LIBCPP_HIDE_FROM_ABI void* __call( 294 _Action __a, any* __other = nullptr, type_info const* __info = nullptr, const void* __fallback_info = nullptr) { 295 return __h_(__a, this, __other, __info, __fallback_info); 296 } 297 298 template <class> 299 friend struct __any_imp::_SmallHandler; 300 template <class> 301 friend struct __any_imp::_LargeHandler; 302 303 template <class _ValueType> 304 friend add_pointer_t<add_const_t<_ValueType>> any_cast(any const*) _NOEXCEPT; 305 306 template <class _ValueType> 307 friend add_pointer_t<_ValueType> any_cast(any*) _NOEXCEPT; 308 309 _HandleFuncPtr __h_ = nullptr; 310 _Storage __s_; 311}; 312 313namespace __any_imp { 314template <class _Tp> 315struct _LIBCPP_TEMPLATE_VIS _SmallHandler { 316 _LIBCPP_HIDE_FROM_ABI static void* 317 __handle(_Action __act, any const* __this, any* __other, type_info const* __info, const void* __fallback_info) { 318 switch (__act) { 319 case _Action::_Destroy: 320 __destroy(const_cast<any&>(*__this)); 321 return nullptr; 322 case _Action::_Copy: 323 __copy(*__this, *__other); 324 return nullptr; 325 case _Action::_Move: 326 __move(const_cast<any&>(*__this), *__other); 327 return nullptr; 328 case _Action::_Get: 329 return __get(const_cast<any&>(*__this), __info, __fallback_info); 330 case _Action::_TypeInfo: 331 return __type_info(); 332 } 333 __libcpp_unreachable(); 334 } 335 336 template <class... _Args> 337 _LIBCPP_HIDE_FROM_ABI static _Tp& __create(any& __dest, _Args&&... __args) { 338 typedef allocator<_Tp> _Alloc; 339 typedef allocator_traits<_Alloc> _ATraits; 340 _Alloc __a; 341 _Tp* __ret = static_cast<_Tp*>(static_cast<void*>(&__dest.__s_.__buf)); 342 _ATraits::construct(__a, __ret, std::forward<_Args>(__args)...); 343 __dest.__h_ = &_SmallHandler::__handle; 344 return *__ret; 345 } 346 347private: 348 _LIBCPP_HIDE_FROM_ABI static void __destroy(any& __this) { 349 typedef allocator<_Tp> _Alloc; 350 typedef allocator_traits<_Alloc> _ATraits; 351 _Alloc __a; 352 _Tp* __p = static_cast<_Tp*>(static_cast<void*>(&__this.__s_.__buf)); 353 _ATraits::destroy(__a, __p); 354 __this.__h_ = nullptr; 355 } 356 357 _LIBCPP_HIDE_FROM_ABI static void __copy(any const& __this, any& __dest) { 358 _SmallHandler::__create(__dest, *static_cast<_Tp const*>(static_cast<void const*>(&__this.__s_.__buf))); 359 } 360 361 _LIBCPP_HIDE_FROM_ABI static void __move(any& __this, any& __dest) { 362 _SmallHandler::__create(__dest, std::move(*static_cast<_Tp*>(static_cast<void*>(&__this.__s_.__buf)))); 363 __destroy(__this); 364 } 365 366 _LIBCPP_HIDE_FROM_ABI static void* __get(any& __this, type_info const* __info, const void* __fallback_id) { 367 if (__any_imp::__compare_typeid<_Tp>(__info, __fallback_id)) 368 return static_cast<void*>(&__this.__s_.__buf); 369 return nullptr; 370 } 371 372 _LIBCPP_HIDE_FROM_ABI static void* __type_info() { 373# if _LIBCPP_HAS_RTTI 374 return const_cast<void*>(static_cast<void const*>(&typeid(_Tp))); 375# else 376 return nullptr; 377# endif 378 } 379}; 380 381template <class _Tp> 382struct _LIBCPP_TEMPLATE_VIS _LargeHandler { 383 _LIBCPP_HIDE_FROM_ABI static void* 384 __handle(_Action __act, any const* __this, any* __other, type_info const* __info, void const* __fallback_info) { 385 switch (__act) { 386 case _Action::_Destroy: 387 __destroy(const_cast<any&>(*__this)); 388 return nullptr; 389 case _Action::_Copy: 390 __copy(*__this, *__other); 391 return nullptr; 392 case _Action::_Move: 393 __move(const_cast<any&>(*__this), *__other); 394 return nullptr; 395 case _Action::_Get: 396 return __get(const_cast<any&>(*__this), __info, __fallback_info); 397 case _Action::_TypeInfo: 398 return __type_info(); 399 } 400 __libcpp_unreachable(); 401 } 402 403 template <class... _Args> 404 _LIBCPP_HIDE_FROM_ABI static _Tp& __create(any& __dest, _Args&&... __args) { 405 typedef allocator<_Tp> _Alloc; 406 typedef allocator_traits<_Alloc> _ATraits; 407 typedef __allocator_destructor<_Alloc> _Dp; 408 _Alloc __a; 409 unique_ptr<_Tp, _Dp> __hold(_ATraits::allocate(__a, 1), _Dp(__a, 1)); 410 _Tp* __ret = __hold.get(); 411 _ATraits::construct(__a, __ret, std::forward<_Args>(__args)...); 412 __dest.__s_.__ptr = __hold.release(); 413 __dest.__h_ = &_LargeHandler::__handle; 414 return *__ret; 415 } 416 417private: 418 _LIBCPP_HIDE_FROM_ABI static void __destroy(any& __this) { 419 typedef allocator<_Tp> _Alloc; 420 typedef allocator_traits<_Alloc> _ATraits; 421 _Alloc __a; 422 _Tp* __p = static_cast<_Tp*>(__this.__s_.__ptr); 423 _ATraits::destroy(__a, __p); 424 _ATraits::deallocate(__a, __p, 1); 425 __this.__h_ = nullptr; 426 } 427 428 _LIBCPP_HIDE_FROM_ABI static void __copy(any const& __this, any& __dest) { 429 _LargeHandler::__create(__dest, *static_cast<_Tp const*>(__this.__s_.__ptr)); 430 } 431 432 _LIBCPP_HIDE_FROM_ABI static void __move(any& __this, any& __dest) { 433 __dest.__s_.__ptr = __this.__s_.__ptr; 434 __dest.__h_ = &_LargeHandler::__handle; 435 __this.__h_ = nullptr; 436 } 437 438 _LIBCPP_HIDE_FROM_ABI static void* __get(any& __this, type_info const* __info, void const* __fallback_info) { 439 if (__any_imp::__compare_typeid<_Tp>(__info, __fallback_info)) 440 return static_cast<void*>(__this.__s_.__ptr); 441 return nullptr; 442 } 443 444 _LIBCPP_HIDE_FROM_ABI static void* __type_info() { 445# if _LIBCPP_HAS_RTTI 446 return const_cast<void*>(static_cast<void const*>(&typeid(_Tp))); 447# else 448 return nullptr; 449# endif 450 } 451}; 452 453} // namespace __any_imp 454 455template <class _ValueType, class _Tp, class> 456any::any(_ValueType&& __v) : __h_(nullptr) { 457 __any_imp::_Handler<_Tp>::__create(*this, std::forward<_ValueType>(__v)); 458} 459 460template <class _ValueType, class... _Args, class _Tp, class> 461any::any(in_place_type_t<_ValueType>, _Args&&... __args) { 462 __any_imp::_Handler<_Tp>::__create(*this, std::forward<_Args>(__args)...); 463} 464 465template <class _ValueType, class _Up, class... _Args, class _Tp, class> 466any::any(in_place_type_t<_ValueType>, initializer_list<_Up> __il, _Args&&... __args) { 467 __any_imp::_Handler<_Tp>::__create(*this, __il, std::forward<_Args>(__args)...); 468} 469 470template <class _ValueType, class, class> 471inline _LIBCPP_HIDE_FROM_ABI any& any::operator=(_ValueType&& __v) { 472 any(std::forward<_ValueType>(__v)).swap(*this); 473 return *this; 474} 475 476template <class _ValueType, class... _Args, class _Tp, class> 477inline _LIBCPP_HIDE_FROM_ABI _Tp& any::emplace(_Args&&... __args) { 478 reset(); 479 return __any_imp::_Handler<_Tp>::__create(*this, std::forward<_Args>(__args)...); 480} 481 482template <class _ValueType, class _Up, class... _Args, class _Tp, class> 483inline _LIBCPP_HIDE_FROM_ABI _Tp& any::emplace(initializer_list<_Up> __il, _Args&&... __args) { 484 reset(); 485 return __any_imp::_Handler<_Tp>::__create(*this, __il, std::forward<_Args>(__args)...); 486} 487 488inline _LIBCPP_HIDE_FROM_ABI void any::swap(any& __rhs) _NOEXCEPT { 489 if (this == &__rhs) 490 return; 491 if (__h_ && __rhs.__h_) { 492 any __tmp; 493 __rhs.__call(_Action::_Move, &__tmp); 494 this->__call(_Action::_Move, &__rhs); 495 __tmp.__call(_Action::_Move, this); 496 } else if (__h_) { 497 this->__call(_Action::_Move, &__rhs); 498 } else if (__rhs.__h_) { 499 __rhs.__call(_Action::_Move, this); 500 } 501} 502 503// 6.4 Non-member functions 504 505inline _LIBCPP_HIDE_FROM_ABI void swap(any& __lhs, any& __rhs) _NOEXCEPT { __lhs.swap(__rhs); } 506 507template <class _Tp, class... _Args> 508inline _LIBCPP_HIDE_FROM_ABI any make_any(_Args&&... __args) { 509 return any(in_place_type<_Tp>, std::forward<_Args>(__args)...); 510} 511 512template <class _Tp, class _Up, class... _Args> 513inline _LIBCPP_HIDE_FROM_ABI any make_any(initializer_list<_Up> __il, _Args&&... __args) { 514 return any(in_place_type<_Tp>, __il, std::forward<_Args>(__args)...); 515} 516 517template <class _ValueType> 518inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST _ValueType any_cast(any const& __v) { 519 using _RawValueType = __remove_cvref_t<_ValueType>; 520 static_assert(is_constructible<_ValueType, _RawValueType const&>::value, 521 "ValueType is required to be a const lvalue reference " 522 "or a CopyConstructible type"); 523 auto __tmp = std::any_cast<add_const_t<_RawValueType>>(&__v); 524 if (__tmp == nullptr) 525 __throw_bad_any_cast(); 526 return static_cast<_ValueType>(*__tmp); 527} 528 529template <class _ValueType> 530inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST _ValueType any_cast(any& __v) { 531 using _RawValueType = __remove_cvref_t<_ValueType>; 532 static_assert(is_constructible<_ValueType, _RawValueType&>::value, 533 "ValueType is required to be an lvalue reference " 534 "or a CopyConstructible type"); 535 auto __tmp = std::any_cast<_RawValueType>(&__v); 536 if (__tmp == nullptr) 537 __throw_bad_any_cast(); 538 return static_cast<_ValueType>(*__tmp); 539} 540 541template <class _ValueType> 542inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST _ValueType any_cast(any&& __v) { 543 using _RawValueType = __remove_cvref_t<_ValueType>; 544 static_assert(is_constructible<_ValueType, _RawValueType>::value, 545 "ValueType is required to be an rvalue reference " 546 "or a CopyConstructible type"); 547 auto __tmp = std::any_cast<_RawValueType>(&__v); 548 if (__tmp == nullptr) 549 __throw_bad_any_cast(); 550 return static_cast<_ValueType>(std::move(*__tmp)); 551} 552 553template <class _ValueType> 554inline _LIBCPP_HIDE_FROM_ABI add_pointer_t<add_const_t<_ValueType>> any_cast(any const* __any) _NOEXCEPT { 555 static_assert(!is_void_v<_ValueType>, "_ValueType may not be void."); 556 static_assert(!is_reference<_ValueType>::value, "_ValueType may not be a reference."); 557 return std::any_cast<_ValueType>(const_cast<any*>(__any)); 558} 559 560template <class _RetType> 561inline _LIBCPP_HIDE_FROM_ABI _RetType __pointer_or_func_cast(void* __p, /*IsFunction*/ false_type) noexcept { 562 return static_cast<_RetType>(__p); 563} 564 565template <class _RetType> 566inline _LIBCPP_HIDE_FROM_ABI _RetType __pointer_or_func_cast(void*, /*IsFunction*/ true_type) noexcept { 567 return nullptr; 568} 569 570template <class _ValueType> 571_LIBCPP_HIDE_FROM_ABI add_pointer_t<_ValueType> any_cast(any* __any) _NOEXCEPT { 572 using __any_imp::_Action; 573 static_assert(!is_void_v<_ValueType>, "_ValueType may not be void."); 574 static_assert(!is_reference<_ValueType>::value, "_ValueType may not be a reference."); 575 typedef add_pointer_t<_ValueType> _ReturnType; 576 if (__any && __any->__h_) { 577 void* __p = __any->__call( 578 _Action::_Get, 579 nullptr, 580# if _LIBCPP_HAS_RTTI 581 &typeid(_ValueType), 582# else 583 nullptr, 584# endif 585 __any_imp::__get_fallback_typeid<_ValueType>()); 586 return std::__pointer_or_func_cast<_ReturnType>(__p, is_function<_ValueType>{}); 587 } 588 return nullptr; 589} 590 591#endif // _LIBCPP_STD_VER >= 17 592 593_LIBCPP_END_NAMESPACE_STD 594 595_LIBCPP_POP_MACROS 596 597#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17 598# include <chrono> 599#endif 600 601#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 602# include <atomic> 603# include <concepts> 604# include <cstdlib> 605# include <iosfwd> 606# include <iterator> 607# include <memory> 608# include <stdexcept> 609# include <type_traits> 610# include <variant> 611#endif 612 613#endif // _LIBCPP_ANY 614