1// -*- C++ -*- 2//===------------------------ type_traits ---------------------------------===// 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_TYPE_TRAITS 11#define _LIBCPP_TYPE_TRAITS 12 13/* 14 type_traits synopsis 15 16namespace std 17{ 18 19 // helper class: 20 template <class T, T v> struct integral_constant; 21 typedef integral_constant<bool, true> true_type; // C++11 22 typedef integral_constant<bool, false> false_type; // C++11 23 24 template <bool B> // C++14 25 using bool_constant = integral_constant<bool, B>; // C++14 26 typedef bool_constant<true> true_type; // C++14 27 typedef bool_constant<false> false_type; // C++14 28 29 // helper traits 30 template <bool, class T = void> struct enable_if; 31 template <bool, class T, class F> struct conditional; 32 33 // Primary classification traits: 34 template <class T> struct is_void; 35 template <class T> struct is_null_pointer; // C++14 36 template <class T> struct is_integral; 37 template <class T> struct is_floating_point; 38 template <class T> struct is_array; 39 template <class T> struct is_pointer; 40 template <class T> struct is_lvalue_reference; 41 template <class T> struct is_rvalue_reference; 42 template <class T> struct is_member_object_pointer; 43 template <class T> struct is_member_function_pointer; 44 template <class T> struct is_enum; 45 template <class T> struct is_union; 46 template <class T> struct is_class; 47 template <class T> struct is_function; 48 49 // Secondary classification traits: 50 template <class T> struct is_reference; 51 template <class T> struct is_arithmetic; 52 template <class T> struct is_fundamental; 53 template <class T> struct is_member_pointer; 54 template <class T> struct is_scalar; 55 template <class T> struct is_object; 56 template <class T> struct is_compound; 57 58 // Const-volatile properties and transformations: 59 template <class T> struct is_const; 60 template <class T> struct is_volatile; 61 template <class T> struct remove_const; 62 template <class T> struct remove_volatile; 63 template <class T> struct remove_cv; 64 template <class T> struct add_const; 65 template <class T> struct add_volatile; 66 template <class T> struct add_cv; 67 68 // Reference transformations: 69 template <class T> struct remove_reference; 70 template <class T> struct add_lvalue_reference; 71 template <class T> struct add_rvalue_reference; 72 73 // Pointer transformations: 74 template <class T> struct remove_pointer; 75 template <class T> struct add_pointer; 76 77 template<class T> struct type_identity; // C++20 78 template<class T> 79 using type_identity_t = typename type_identity<T>::type; // C++20 80 81 // Integral properties: 82 template <class T> struct is_signed; 83 template <class T> struct is_unsigned; 84 template <class T> struct make_signed; 85 template <class T> struct make_unsigned; 86 87 // Array properties and transformations: 88 template <class T> struct rank; 89 template <class T, unsigned I = 0> struct extent; 90 template <class T> struct remove_extent; 91 template <class T> struct remove_all_extents; 92 93 template <class T> struct is_bounded_array; // C++20 94 template <class T> struct is_unbounded_array; // C++20 95 96 // Member introspection: 97 template <class T> struct is_pod; 98 template <class T> struct is_trivial; 99 template <class T> struct is_trivially_copyable; 100 template <class T> struct is_standard_layout; 101 template <class T> struct is_literal_type; 102 template <class T> struct is_empty; 103 template <class T> struct is_polymorphic; 104 template <class T> struct is_abstract; 105 template <class T> struct is_final; // C++14 106 template <class T> struct is_aggregate; // C++17 107 108 template <class T, class... Args> struct is_constructible; 109 template <class T> struct is_default_constructible; 110 template <class T> struct is_copy_constructible; 111 template <class T> struct is_move_constructible; 112 template <class T, class U> struct is_assignable; 113 template <class T> struct is_copy_assignable; 114 template <class T> struct is_move_assignable; 115 template <class T, class U> struct is_swappable_with; // C++17 116 template <class T> struct is_swappable; // C++17 117 template <class T> struct is_destructible; 118 119 template <class T, class... Args> struct is_trivially_constructible; 120 template <class T> struct is_trivially_default_constructible; 121 template <class T> struct is_trivially_copy_constructible; 122 template <class T> struct is_trivially_move_constructible; 123 template <class T, class U> struct is_trivially_assignable; 124 template <class T> struct is_trivially_copy_assignable; 125 template <class T> struct is_trivially_move_assignable; 126 template <class T> struct is_trivially_destructible; 127 128 template <class T, class... Args> struct is_nothrow_constructible; 129 template <class T> struct is_nothrow_default_constructible; 130 template <class T> struct is_nothrow_copy_constructible; 131 template <class T> struct is_nothrow_move_constructible; 132 template <class T, class U> struct is_nothrow_assignable; 133 template <class T> struct is_nothrow_copy_assignable; 134 template <class T> struct is_nothrow_move_assignable; 135 template <class T, class U> struct is_nothrow_swappable_with; // C++17 136 template <class T> struct is_nothrow_swappable; // C++17 137 template <class T> struct is_nothrow_destructible; 138 139 template <class T> struct has_virtual_destructor; 140 141 template<class T> struct has_unique_object_representations; // C++17 142 143 // Relationships between types: 144 template <class T, class U> struct is_same; 145 template <class Base, class Derived> struct is_base_of; 146 147 template <class From, class To> struct is_convertible; 148 template <typename From, typename To> struct is_nothrow_convertible; // C++20 149 template <typename From, typename To> inline constexpr bool is_nothrow_convertible_v; // C++20 150 151 template <class Fn, class... ArgTypes> struct is_invocable; 152 template <class R, class Fn, class... ArgTypes> struct is_invocable_r; 153 154 template <class Fn, class... ArgTypes> struct is_nothrow_invocable; 155 template <class R, class Fn, class... ArgTypes> struct is_nothrow_invocable_r; 156 157 // Alignment properties and transformations: 158 template <class T> struct alignment_of; 159 template <size_t Len, size_t Align = most_stringent_alignment_requirement> 160 struct aligned_storage; 161 template <size_t Len, class... Types> struct aligned_union; 162 template <class T> struct remove_cvref; // C++20 163 164 template <class T> struct decay; 165 template <class... T> struct common_type; 166 template <class T> struct underlying_type; 167 template <class> class result_of; // undefined 168 template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; 169 template <class Fn, class... ArgTypes> struct invoke_result; // C++17 170 171 // const-volatile modifications: 172 template <class T> 173 using remove_const_t = typename remove_const<T>::type; // C++14 174 template <class T> 175 using remove_volatile_t = typename remove_volatile<T>::type; // C++14 176 template <class T> 177 using remove_cv_t = typename remove_cv<T>::type; // C++14 178 template <class T> 179 using add_const_t = typename add_const<T>::type; // C++14 180 template <class T> 181 using add_volatile_t = typename add_volatile<T>::type; // C++14 182 template <class T> 183 using add_cv_t = typename add_cv<T>::type; // C++14 184 185 // reference modifications: 186 template <class T> 187 using remove_reference_t = typename remove_reference<T>::type; // C++14 188 template <class T> 189 using add_lvalue_reference_t = typename add_lvalue_reference<T>::type; // C++14 190 template <class T> 191 using add_rvalue_reference_t = typename add_rvalue_reference<T>::type; // C++14 192 193 // sign modifications: 194 template <class T> 195 using make_signed_t = typename make_signed<T>::type; // C++14 196 template <class T> 197 using make_unsigned_t = typename make_unsigned<T>::type; // C++14 198 199 // array modifications: 200 template <class T> 201 using remove_extent_t = typename remove_extent<T>::type; // C++14 202 template <class T> 203 using remove_all_extents_t = typename remove_all_extents<T>::type; // C++14 204 205 template <class T> 206 inline constexpr bool is_bounded_array_v 207 = is_bounded_array<T>::value; // C++20 208 inline constexpr bool is_unbounded_array_v 209 = is_unbounded_array<T>::value; // C++20 210 211 // pointer modifications: 212 template <class T> 213 using remove_pointer_t = typename remove_pointer<T>::type; // C++14 214 template <class T> 215 using add_pointer_t = typename add_pointer<T>::type; // C++14 216 217 // other transformations: 218 template <size_t Len, std::size_t Align=default-alignment> 219 using aligned_storage_t = typename aligned_storage<Len,Align>::type; // C++14 220 template <std::size_t Len, class... Types> 221 using aligned_union_t = typename aligned_union<Len,Types...>::type; // C++14 222 template <class T> 223 using remove_cvref_t = typename remove_cvref<T>::type; // C++20 224 template <class T> 225 using decay_t = typename decay<T>::type; // C++14 226 template <bool b, class T=void> 227 using enable_if_t = typename enable_if<b,T>::type; // C++14 228 template <bool b, class T, class F> 229 using conditional_t = typename conditional<b,T,F>::type; // C++14 230 template <class... T> 231 using common_type_t = typename common_type<T...>::type; // C++14 232 template <class T> 233 using underlying_type_t = typename underlying_type<T>::type; // C++14 234 template <class T> 235 using result_of_t = typename result_of<T>::type; // C++14 236 template <class Fn, class... ArgTypes> 237 using invoke_result_t = typename invoke_result<Fn, ArgTypes...>::type; // C++17 238 239 template <class...> 240 using void_t = void; // C++17 241 242 // See C++14 20.10.4.1, primary type categories 243 template <class T> inline constexpr bool is_void_v 244 = is_void<T>::value; // C++17 245 template <class T> inline constexpr bool is_null_pointer_v 246 = is_null_pointer<T>::value; // C++17 247 template <class T> inline constexpr bool is_integral_v 248 = is_integral<T>::value; // C++17 249 template <class T> inline constexpr bool is_floating_point_v 250 = is_floating_point<T>::value; // C++17 251 template <class T> inline constexpr bool is_array_v 252 = is_array<T>::value; // C++17 253 template <class T> inline constexpr bool is_pointer_v 254 = is_pointer<T>::value; // C++17 255 template <class T> inline constexpr bool is_lvalue_reference_v 256 = is_lvalue_reference<T>::value; // C++17 257 template <class T> inline constexpr bool is_rvalue_reference_v 258 = is_rvalue_reference<T>::value; // C++17 259 template <class T> inline constexpr bool is_member_object_pointer_v 260 = is_member_object_pointer<T>::value; // C++17 261 template <class T> inline constexpr bool is_member_function_pointer_v 262 = is_member_function_pointer<T>::value; // C++17 263 template <class T> inline constexpr bool is_enum_v 264 = is_enum<T>::value; // C++17 265 template <class T> inline constexpr bool is_union_v 266 = is_union<T>::value; // C++17 267 template <class T> inline constexpr bool is_class_v 268 = is_class<T>::value; // C++17 269 template <class T> inline constexpr bool is_function_v 270 = is_function<T>::value; // C++17 271 272 // See C++14 20.10.4.2, composite type categories 273 template <class T> inline constexpr bool is_reference_v 274 = is_reference<T>::value; // C++17 275 template <class T> inline constexpr bool is_arithmetic_v 276 = is_arithmetic<T>::value; // C++17 277 template <class T> inline constexpr bool is_fundamental_v 278 = is_fundamental<T>::value; // C++17 279 template <class T> inline constexpr bool is_object_v 280 = is_object<T>::value; // C++17 281 template <class T> inline constexpr bool is_scalar_v 282 = is_scalar<T>::value; // C++17 283 template <class T> inline constexpr bool is_compound_v 284 = is_compound<T>::value; // C++17 285 template <class T> inline constexpr bool is_member_pointer_v 286 = is_member_pointer<T>::value; // C++17 287 288 // See C++14 20.10.4.3, type properties 289 template <class T> inline constexpr bool is_const_v 290 = is_const<T>::value; // C++17 291 template <class T> inline constexpr bool is_volatile_v 292 = is_volatile<T>::value; // C++17 293 template <class T> inline constexpr bool is_trivial_v 294 = is_trivial<T>::value; // C++17 295 template <class T> inline constexpr bool is_trivially_copyable_v 296 = is_trivially_copyable<T>::value; // C++17 297 template <class T> inline constexpr bool is_standard_layout_v 298 = is_standard_layout<T>::value; // C++17 299 template <class T> inline constexpr bool is_pod_v 300 = is_pod<T>::value; // C++17 301 template <class T> inline constexpr bool is_literal_type_v 302 = is_literal_type<T>::value; // C++17 303 template <class T> inline constexpr bool is_empty_v 304 = is_empty<T>::value; // C++17 305 template <class T> inline constexpr bool is_polymorphic_v 306 = is_polymorphic<T>::value; // C++17 307 template <class T> inline constexpr bool is_abstract_v 308 = is_abstract<T>::value; // C++17 309 template <class T> inline constexpr bool is_final_v 310 = is_final<T>::value; // C++17 311 template <class T> inline constexpr bool is_aggregate_v 312 = is_aggregate<T>::value; // C++17 313 template <class T> inline constexpr bool is_signed_v 314 = is_signed<T>::value; // C++17 315 template <class T> inline constexpr bool is_unsigned_v 316 = is_unsigned<T>::value; // C++17 317 template <class T, class... Args> inline constexpr bool is_constructible_v 318 = is_constructible<T, Args...>::value; // C++17 319 template <class T> inline constexpr bool is_default_constructible_v 320 = is_default_constructible<T>::value; // C++17 321 template <class T> inline constexpr bool is_copy_constructible_v 322 = is_copy_constructible<T>::value; // C++17 323 template <class T> inline constexpr bool is_move_constructible_v 324 = is_move_constructible<T>::value; // C++17 325 template <class T, class U> inline constexpr bool is_assignable_v 326 = is_assignable<T, U>::value; // C++17 327 template <class T> inline constexpr bool is_copy_assignable_v 328 = is_copy_assignable<T>::value; // C++17 329 template <class T> inline constexpr bool is_move_assignable_v 330 = is_move_assignable<T>::value; // C++17 331 template <class T, class U> inline constexpr bool is_swappable_with_v 332 = is_swappable_with<T, U>::value; // C++17 333 template <class T> inline constexpr bool is_swappable_v 334 = is_swappable<T>::value; // C++17 335 template <class T> inline constexpr bool is_destructible_v 336 = is_destructible<T>::value; // C++17 337 template <class T, class... Args> inline constexpr bool is_trivially_constructible_v 338 = is_trivially_constructible<T, Args...>::value; // C++17 339 template <class T> inline constexpr bool is_trivially_default_constructible_v 340 = is_trivially_default_constructible<T>::value; // C++17 341 template <class T> inline constexpr bool is_trivially_copy_constructible_v 342 = is_trivially_copy_constructible<T>::value; // C++17 343 template <class T> inline constexpr bool is_trivially_move_constructible_v 344 = is_trivially_move_constructible<T>::value; // C++17 345 template <class T, class U> inline constexpr bool is_trivially_assignable_v 346 = is_trivially_assignable<T, U>::value; // C++17 347 template <class T> inline constexpr bool is_trivially_copy_assignable_v 348 = is_trivially_copy_assignable<T>::value; // C++17 349 template <class T> inline constexpr bool is_trivially_move_assignable_v 350 = is_trivially_move_assignable<T>::value; // C++17 351 template <class T> inline constexpr bool is_trivially_destructible_v 352 = is_trivially_destructible<T>::value; // C++17 353 template <class T, class... Args> inline constexpr bool is_nothrow_constructible_v 354 = is_nothrow_constructible<T, Args...>::value; // C++17 355 template <class T> inline constexpr bool is_nothrow_default_constructible_v 356 = is_nothrow_default_constructible<T>::value; // C++17 357 template <class T> inline constexpr bool is_nothrow_copy_constructible_v 358 = is_nothrow_copy_constructible<T>::value; // C++17 359 template <class T> inline constexpr bool is_nothrow_move_constructible_v 360 = is_nothrow_move_constructible<T>::value; // C++17 361 template <class T, class U> inline constexpr bool is_nothrow_assignable_v 362 = is_nothrow_assignable<T, U>::value; // C++17 363 template <class T> inline constexpr bool is_nothrow_copy_assignable_v 364 = is_nothrow_copy_assignable<T>::value; // C++17 365 template <class T> inline constexpr bool is_nothrow_move_assignable_v 366 = is_nothrow_move_assignable<T>::value; // C++17 367 template <class T, class U> inline constexpr bool is_nothrow_swappable_with_v 368 = is_nothrow_swappable_with<T, U>::value; // C++17 369 template <class T> inline constexpr bool is_nothrow_swappable_v 370 = is_nothrow_swappable<T>::value; // C++17 371 template <class T> inline constexpr bool is_nothrow_destructible_v 372 = is_nothrow_destructible<T>::value; // C++17 373 template <class T> inline constexpr bool has_virtual_destructor_v 374 = has_virtual_destructor<T>::value; // C++17 375 template<class T> inline constexpr bool has_unique_object_representations_v // C++17 376 = has_unique_object_representations<T>::value; 377 378 // See C++14 20.10.5, type property queries 379 template <class T> inline constexpr size_t alignment_of_v 380 = alignment_of<T>::value; // C++17 381 template <class T> inline constexpr size_t rank_v 382 = rank<T>::value; // C++17 383 template <class T, unsigned I = 0> inline constexpr size_t extent_v 384 = extent<T, I>::value; // C++17 385 386 // See C++14 20.10.6, type relations 387 template <class T, class U> inline constexpr bool is_same_v 388 = is_same<T, U>::value; // C++17 389 template <class Base, class Derived> inline constexpr bool is_base_of_v 390 = is_base_of<Base, Derived>::value; // C++17 391 template <class From, class To> inline constexpr bool is_convertible_v 392 = is_convertible<From, To>::value; // C++17 393 template <class Fn, class... ArgTypes> inline constexpr bool is_invocable_v 394 = is_invocable<Fn, ArgTypes...>::value; // C++17 395 template <class R, class Fn, class... ArgTypes> inline constexpr bool is_invocable_r_v 396 = is_invocable_r<R, Fn, ArgTypes...>::value; // C++17 397 template <class Fn, class... ArgTypes> inline constexpr bool is_nothrow_invocable_v 398 = is_nothrow_invocable<Fn, ArgTypes...>::value; // C++17 399 template <class R, class Fn, class... ArgTypes> inline constexpr bool is_nothrow_invocable_r_v 400 = is_nothrow_invocable_r<R, Fn, ArgTypes...>::value; // C++17 401 402 // [meta.logical], logical operator traits: 403 template<class... B> struct conjunction; // C++17 404 template<class... B> 405 inline constexpr bool conjunction_v = conjunction<B...>::value; // C++17 406 template<class... B> struct disjunction; // C++17 407 template<class... B> 408 inline constexpr bool disjunction_v = disjunction<B...>::value; // C++17 409 template<class B> struct negation; // C++17 410 template<class B> 411 inline constexpr bool negation_v = negation<B>::value; // C++17 412 413} 414 415*/ 416#include <__config> 417#include <cstddef> 418#include <version> 419 420#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 421#pragma GCC system_header 422#endif 423 424_LIBCPP_BEGIN_NAMESPACE_STD 425 426template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS pair; 427template <class _Tp> class _LIBCPP_TEMPLATE_VIS reference_wrapper; 428template <class _Tp> struct _LIBCPP_TEMPLATE_VIS hash; 429 430template <class _Tp, _Tp __v> 431struct _LIBCPP_TEMPLATE_VIS integral_constant 432{ 433 static _LIBCPP_CONSTEXPR const _Tp value = __v; 434 typedef _Tp value_type; 435 typedef integral_constant type; 436 _LIBCPP_INLINE_VISIBILITY 437 _LIBCPP_CONSTEXPR operator value_type() const _NOEXCEPT {return value;} 438#if _LIBCPP_STD_VER > 11 439 _LIBCPP_INLINE_VISIBILITY 440 constexpr value_type operator ()() const _NOEXCEPT {return value;} 441#endif 442}; 443 444template <class _Tp, _Tp __v> 445_LIBCPP_CONSTEXPR const _Tp integral_constant<_Tp, __v>::value; 446 447#if _LIBCPP_STD_VER > 14 448template <bool __b> 449using bool_constant = integral_constant<bool, __b>; 450#define _LIBCPP_BOOL_CONSTANT(__b) bool_constant<(__b)> 451#else 452#define _LIBCPP_BOOL_CONSTANT(__b) integral_constant<bool,(__b)> 453#endif 454 455typedef _LIBCPP_BOOL_CONSTANT(true) true_type; 456typedef _LIBCPP_BOOL_CONSTANT(false) false_type; 457 458template <bool _Val> 459using _BoolConstant _LIBCPP_NODEBUG_TYPE = integral_constant<bool, _Val>; 460 461template <bool> struct _MetaBase; 462template <> 463struct _MetaBase<true> { 464 template <class _Tp, class _Up> 465 using _SelectImpl _LIBCPP_NODEBUG_TYPE = _Tp; 466 template <template <class...> class _FirstFn, template <class...> class, class ..._Args> 467 using _SelectApplyImpl _LIBCPP_NODEBUG_TYPE = _FirstFn<_Args...>; 468 template <class _First, class...> 469 using _FirstImpl _LIBCPP_NODEBUG_TYPE = _First; 470 template <class, class _Second, class...> 471 using _SecondImpl _LIBCPP_NODEBUG_TYPE = _Second; 472 template <class _Tp = void> 473 using _EnableIfImpl _LIBCPP_NODEBUG_TYPE = _Tp; 474 template <class _Result, class _First, class ..._Rest> 475 using _OrImpl _LIBCPP_NODEBUG_TYPE = typename _MetaBase<_First::value != true && sizeof...(_Rest) != 0>::template _OrImpl<_First, _Rest...>; 476 template <class _Result, class _First, class ..._Rest> 477 using _AndImpl _LIBCPP_NODEBUG_TYPE = typename _MetaBase<_First::value == true && sizeof...(_Rest) != 0>::template _AndImpl<_First, _Rest...>; 478}; 479 480template <> 481struct _MetaBase<false> { 482 template <class _Tp, class _Up> 483 using _SelectImpl _LIBCPP_NODEBUG_TYPE = _Up; 484 template <template <class...> class, template <class...> class _SecondFn, class ..._Args> 485 using _SelectApplyImpl _LIBCPP_NODEBUG_TYPE = _SecondFn<_Args...>; 486 template <class _Result, class ...> 487 using _OrImpl _LIBCPP_NODEBUG_TYPE = _Result; 488 template <class _Result, class ...> 489 using _AndImpl _LIBCPP_NODEBUG_TYPE = _Result; 490}; 491template <bool _Cond, class _Ret = void> 492using _EnableIf _LIBCPP_NODEBUG_TYPE = typename _MetaBase<_Cond>::template _EnableIfImpl<_Ret>; 493template <bool _Cond, class _IfRes, class _ElseRes> 494using _If _LIBCPP_NODEBUG_TYPE = typename _MetaBase<_Cond>::template _SelectImpl<_IfRes, _ElseRes>; 495template <class ..._Rest> 496using _Or _LIBCPP_NODEBUG_TYPE = typename _MetaBase< sizeof...(_Rest) != 0 >::template _OrImpl<false_type, _Rest...>; 497template <class ..._Rest> 498using _And _LIBCPP_NODEBUG_TYPE = typename _MetaBase< sizeof...(_Rest) != 0 >::template _AndImpl<true_type, _Rest...>; 499template <class _Pred> 500struct _Not : _BoolConstant<!_Pred::value> {}; 501template <class ..._Args> 502using _FirstType _LIBCPP_NODEBUG_TYPE = typename _MetaBase<(sizeof...(_Args) >= 1)>::template _FirstImpl<_Args...>; 503template <class ..._Args> 504using _SecondType _LIBCPP_NODEBUG_TYPE = typename _MetaBase<(sizeof...(_Args) >= 2)>::template _SecondImpl<_Args...>; 505 506template <template <class...> class _Func, class ..._Args> 507struct _Lazy : _Func<_Args...> {}; 508 509// Member detector base 510 511template <template <class...> class _Templ, class ..._Args, class = _Templ<_Args...> > 512true_type __sfinae_test_impl(int); 513template <template <class...> class, class ...> 514false_type __sfinae_test_impl(...); 515 516template <template <class ...> class _Templ, class ..._Args> 517using _IsValidExpansion _LIBCPP_NODEBUG_TYPE = decltype(__sfinae_test_impl<_Templ, _Args...>(0)); 518 519template <class> 520struct __void_t { typedef void type; }; 521 522template <class _Tp> 523struct __identity { typedef _Tp type; }; 524 525template <class _Tp, bool> 526struct _LIBCPP_TEMPLATE_VIS __dependent_type : public _Tp {}; 527 528 529template <bool _Bp, class _If, class _Then> 530 struct _LIBCPP_TEMPLATE_VIS conditional {typedef _If type;}; 531template <class _If, class _Then> 532 struct _LIBCPP_TEMPLATE_VIS conditional<false, _If, _Then> {typedef _Then type;}; 533 534#if _LIBCPP_STD_VER > 11 535template <bool _Bp, class _If, class _Then> using conditional_t = typename conditional<_Bp, _If, _Then>::type; 536#endif 537 538template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {}; 539template <class _Tp> struct _LIBCPP_TEMPLATE_VIS enable_if<true, _Tp> {typedef _Tp type;}; 540 541#if _LIBCPP_STD_VER > 11 542template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp, _Tp>::type; 543#endif 544 545// is_same 546 547#if __has_keyword(__is_same) 548 549template <class _Tp, class _Up> 550struct _LIBCPP_TEMPLATE_VIS is_same : _BoolConstant<__is_same(_Tp, _Up)> { }; 551 552#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 553template <class _Tp, class _Up> 554_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_same_v = __is_same(_Tp, _Up); 555#endif 556 557#else 558 559template <class _Tp, class _Up> struct _LIBCPP_TEMPLATE_VIS is_same : public false_type {}; 560template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_same<_Tp, _Tp> : public true_type {}; 561 562#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 563template <class _Tp, class _Up> 564_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_same_v 565 = is_same<_Tp, _Up>::value; 566#endif 567 568#endif // __is_same 569 570template <class _Tp, class _Up> 571using _IsSame = _BoolConstant< 572#ifdef __clang__ 573 __is_same(_Tp, _Up) 574#else 575 _VSTD::is_same<_Tp, _Up>::value 576#endif 577>; 578 579template <class _Tp, class _Up> 580using _IsNotSame = _BoolConstant< 581#ifdef __clang__ 582 !__is_same(_Tp, _Up) 583#else 584 !_VSTD::is_same<_Tp, _Up>::value 585#endif 586>; 587 588 589template <class _Tp> 590using __test_for_primary_template = _EnableIf< 591 _IsSame<_Tp, typename _Tp::__primary_template>::value 592 >; 593template <class _Tp> 594using __is_primary_template = _IsValidExpansion< 595 __test_for_primary_template, _Tp 596 >; 597 598// addressof 599#ifndef _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF 600 601template <class _Tp> 602inline _LIBCPP_CONSTEXPR_AFTER_CXX14 603_LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY 604_Tp* 605addressof(_Tp& __x) _NOEXCEPT 606{ 607 return __builtin_addressof(__x); 608} 609 610#else 611 612template <class _Tp> 613inline _LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY 614_Tp* 615addressof(_Tp& __x) _NOEXCEPT 616{ 617 return reinterpret_cast<_Tp *>( 618 const_cast<char *>(&reinterpret_cast<const volatile char &>(__x))); 619} 620 621#endif // _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF 622 623#if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF) 624// Objective-C++ Automatic Reference Counting uses qualified pointers 625// that require special addressof() signatures. When 626// _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler 627// itself is providing these definitions. Otherwise, we provide them. 628template <class _Tp> 629inline _LIBCPP_INLINE_VISIBILITY 630__strong _Tp* 631addressof(__strong _Tp& __x) _NOEXCEPT 632{ 633 return &__x; 634} 635 636#ifdef _LIBCPP_HAS_OBJC_ARC_WEAK 637template <class _Tp> 638inline _LIBCPP_INLINE_VISIBILITY 639__weak _Tp* 640addressof(__weak _Tp& __x) _NOEXCEPT 641{ 642 return &__x; 643} 644#endif 645 646template <class _Tp> 647inline _LIBCPP_INLINE_VISIBILITY 648__autoreleasing _Tp* 649addressof(__autoreleasing _Tp& __x) _NOEXCEPT 650{ 651 return &__x; 652} 653 654template <class _Tp> 655inline _LIBCPP_INLINE_VISIBILITY 656__unsafe_unretained _Tp* 657addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT 658{ 659 return &__x; 660} 661#endif 662 663#if !defined(_LIBCPP_CXX03_LANG) 664template <class _Tp> _Tp* addressof(const _Tp&&) noexcept = delete; 665#endif 666 667struct __two {char __lx[2];}; 668 669// helper class: 670 671// is_const 672 673#if __has_keyword(__is_const) 674 675template <class _Tp> 676struct _LIBCPP_TEMPLATE_VIS is_const : _BoolConstant<__is_const(_Tp)> { }; 677 678#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 679template <class _Tp> 680_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_const_v = __is_const(_Tp); 681#endif 682 683#else 684 685template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const : public false_type {}; 686template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const<_Tp const> : public true_type {}; 687 688#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 689template <class _Tp> 690_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_const_v 691 = is_const<_Tp>::value; 692#endif 693 694#endif // __has_keyword(__is_const) 695 696// is_volatile 697 698#if __has_keyword(__is_volatile) 699 700template <class _Tp> 701struct _LIBCPP_TEMPLATE_VIS is_volatile : _BoolConstant<__is_volatile(_Tp)> { }; 702 703#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 704template <class _Tp> 705_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_volatile_v = __is_volatile(_Tp); 706#endif 707 708#else 709 710template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile : public false_type {}; 711template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile<_Tp volatile> : public true_type {}; 712 713#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 714template <class _Tp> 715_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_volatile_v 716 = is_volatile<_Tp>::value; 717#endif 718 719#endif // __has_keyword(__is_volatile) 720 721// remove_const 722 723#if __has_keyword(__remove_const) 724 725template <class _Tp> 726struct _LIBCPP_TEMPLATE_VIS remove_const {typedef __remove_const(_Tp) type;}; 727 728#if _LIBCPP_STD_VER > 11 729template <class _Tp> using remove_const_t = __remove_const(_Tp); 730#endif 731 732#else 733 734template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const {typedef _Tp type;}; 735template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const<const _Tp> {typedef _Tp type;}; 736#if _LIBCPP_STD_VER > 11 737template <class _Tp> using remove_const_t = typename remove_const<_Tp>::type; 738#endif 739 740#endif // __has_keyword(__remove_const) 741 742// remove_volatile 743 744#if __has_keyword(__remove_volatile) 745 746template <class _Tp> 747struct _LIBCPP_TEMPLATE_VIS remove_volatile {typedef __remove_volatile(_Tp) type;}; 748 749#if _LIBCPP_STD_VER > 11 750template <class _Tp> using remove_volatile_t = __remove_volatile(_Tp); 751#endif 752 753#else 754 755template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile {typedef _Tp type;}; 756template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile<volatile _Tp> {typedef _Tp type;}; 757#if _LIBCPP_STD_VER > 11 758template <class _Tp> using remove_volatile_t = typename remove_volatile<_Tp>::type; 759#endif 760 761#endif // __has_keyword(__remove_volatile) 762 763// remove_cv 764 765#if __has_keyword(__remove_cv) 766 767template <class _Tp> 768struct _LIBCPP_TEMPLATE_VIS remove_cv {typedef __remove_cv(_Tp) type;}; 769 770#if _LIBCPP_STD_VER > 11 771template <class _Tp> using remove_cv_t = __remove_cv(_Tp); 772#endif 773 774#else 775 776template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_cv 777{typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;}; 778#if _LIBCPP_STD_VER > 11 779template <class _Tp> using remove_cv_t = typename remove_cv<_Tp>::type; 780#endif 781 782#endif // __has_keyword(__remove_cv) 783 784// is_void 785 786#if __has_keyword(__is_void) 787 788template <class _Tp> 789struct _LIBCPP_TEMPLATE_VIS is_void : _BoolConstant<__is_void(_Tp)> { }; 790 791#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 792template <class _Tp> 793_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_void_v = __is_void(_Tp); 794#endif 795 796#else 797 798template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_void 799 : public is_same<typename remove_cv<_Tp>::type, void> {}; 800 801#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 802template <class _Tp> 803_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_void_v 804 = is_void<_Tp>::value; 805#endif 806 807#endif // __has_keyword(__is_void) 808 809// __is_nullptr_t 810 811template <class _Tp> struct __is_nullptr_t_impl : public false_type {}; 812template <> struct __is_nullptr_t_impl<nullptr_t> : public true_type {}; 813 814template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __is_nullptr_t 815 : public __is_nullptr_t_impl<typename remove_cv<_Tp>::type> {}; 816 817#if _LIBCPP_STD_VER > 11 818template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_null_pointer 819 : public __is_nullptr_t_impl<typename remove_cv<_Tp>::type> {}; 820 821#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 822template <class _Tp> 823_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_null_pointer_v 824 = is_null_pointer<_Tp>::value; 825#endif 826#endif // _LIBCPP_STD_VER > 11 827 828// is_integral 829 830#if __has_keyword(__is_integral) 831 832template <class _Tp> 833struct _LIBCPP_TEMPLATE_VIS is_integral : _BoolConstant<__is_integral(_Tp)> { }; 834 835#if _LIBCPP_STD_VER > 14 836template <class _Tp> 837_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_integral_v = __is_integral(_Tp); 838#endif 839 840#else 841 842template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_integral 843 : public _BoolConstant<__libcpp_is_integral<typename remove_cv<_Tp>::type>::value> {}; 844 845#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 846template <class _Tp> 847_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_integral_v 848 = is_integral<_Tp>::value; 849#endif 850 851#endif // __has_keyword(__is_integral) 852 853// is_floating_point 854 855template <class _Tp> struct __libcpp_is_floating_point : public false_type {}; 856template <> struct __libcpp_is_floating_point<float> : public true_type {}; 857template <> struct __libcpp_is_floating_point<double> : public true_type {}; 858template <> struct __libcpp_is_floating_point<long double> : public true_type {}; 859 860template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_floating_point 861 : public __libcpp_is_floating_point<typename remove_cv<_Tp>::type> {}; 862 863#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 864template <class _Tp> 865_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_floating_point_v 866 = is_floating_point<_Tp>::value; 867#endif 868 869// is_array 870 871#if __has_keyword(__is_array) 872 873template <class _Tp> 874struct _LIBCPP_TEMPLATE_VIS is_array : _BoolConstant<__is_array(_Tp)> { }; 875 876#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 877template <class _Tp> 878_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_array_v = __is_array(_Tp); 879#endif 880 881#else 882 883template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_array 884 : public false_type {}; 885template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[]> 886 : public true_type {}; 887template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[_Np]> 888 : public true_type {}; 889 890#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 891template <class _Tp> 892_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_array_v 893 = is_array<_Tp>::value; 894#endif 895 896#endif // __has_keyword(__is_array) 897 898// is_pointer 899 900// In clang 10.0.0 and earlier __is_pointer didn't work with Objective-C types. 901#if __has_keyword(__is_pointer) && _LIBCPP_CLANG_VER > 1000 902 903template<class _Tp> 904struct _LIBCPP_TEMPLATE_VIS is_pointer : _BoolConstant<__is_pointer(_Tp)> { }; 905 906#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 907template <class _Tp> 908_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pointer_v = __is_pointer(_Tp); 909#endif 910 911#else // __has_keyword(__is_pointer) 912 913template <class _Tp> struct __libcpp_is_pointer : public false_type {}; 914template <class _Tp> struct __libcpp_is_pointer<_Tp*> : public true_type {}; 915 916template <class _Tp> struct __libcpp_remove_objc_qualifiers { typedef _Tp type; }; 917#if defined(_LIBCPP_HAS_OBJC_ARC) 918template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __strong> { typedef _Tp type; }; 919template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __weak> { typedef _Tp type; }; 920template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __autoreleasing> { typedef _Tp type; }; 921template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __unsafe_unretained> { typedef _Tp type; }; 922#endif 923 924template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pointer 925 : public __libcpp_is_pointer<typename __libcpp_remove_objc_qualifiers<typename remove_cv<_Tp>::type>::type> {}; 926 927#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 928template <class _Tp> 929_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pointer_v 930 = is_pointer<_Tp>::value; 931#endif 932 933#endif // __has_keyword(__is_pointer) 934 935// is_reference 936 937#if __has_keyword(__is_lvalue_reference) && \ 938 __has_keyword(__is_rvalue_reference) && \ 939 __has_keyword(__is_reference) 940 941template<class _Tp> 942struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference : _BoolConstant<__is_lvalue_reference(_Tp)> { }; 943 944template<class _Tp> 945struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference : _BoolConstant<__is_rvalue_reference(_Tp)> { }; 946 947template<class _Tp> 948struct _LIBCPP_TEMPLATE_VIS is_reference : _BoolConstant<__is_reference(_Tp)> { }; 949 950#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 951template <class _Tp> 952_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_reference_v = __is_reference(_Tp); 953 954template <class _Tp> 955_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_lvalue_reference_v = __is_lvalue_reference(_Tp); 956 957template <class _Tp> 958_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_rvalue_reference_v = __is_rvalue_reference(_Tp); 959#endif 960 961#else // __has_keyword(__is_lvalue_reference) && etc... 962 963template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference : public false_type {}; 964template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference<_Tp&> : public true_type {}; 965 966template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference : public false_type {}; 967template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference<_Tp&&> : public true_type {}; 968 969template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference : public false_type {}; 970template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&> : public true_type {}; 971template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&&> : public true_type {}; 972 973#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 974template <class _Tp> 975_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_reference_v 976 = is_reference<_Tp>::value; 977 978template <class _Tp> 979_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_lvalue_reference_v 980 = is_lvalue_reference<_Tp>::value; 981 982template <class _Tp> 983_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_rvalue_reference_v 984 = is_rvalue_reference<_Tp>::value; 985#endif 986 987#endif // __has_keyword(__is_lvalue_reference) && etc... 988 989// is_union 990 991#if __has_feature(is_union) || defined(_LIBCPP_COMPILER_GCC) 992 993template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union 994 : public integral_constant<bool, __is_union(_Tp)> {}; 995 996#else 997 998template <class _Tp> struct __libcpp_union : public false_type {}; 999template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union 1000 : public __libcpp_union<typename remove_cv<_Tp>::type> {}; 1001 1002#endif 1003 1004#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1005template <class _Tp> 1006_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_union_v 1007 = is_union<_Tp>::value; 1008#endif 1009 1010// is_class 1011 1012#if __has_feature(is_class) || defined(_LIBCPP_COMPILER_GCC) 1013 1014template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class 1015 : public integral_constant<bool, __is_class(_Tp)> {}; 1016 1017#else 1018 1019namespace __is_class_imp 1020{ 1021template <class _Tp> char __test(int _Tp::*); 1022template <class _Tp> __two __test(...); 1023} 1024 1025template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class 1026 : public integral_constant<bool, sizeof(__is_class_imp::__test<_Tp>(0)) == 1 && !is_union<_Tp>::value> {}; 1027 1028#endif 1029 1030#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1031template <class _Tp> 1032_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_class_v 1033 = is_class<_Tp>::value; 1034#endif 1035 1036// is_function 1037 1038template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_function 1039 : public _BoolConstant< 1040#ifdef __clang__ 1041 __is_function(_Tp) 1042#else 1043 !(is_reference<_Tp>::value || is_const<const _Tp>::value) 1044#endif 1045 > {}; 1046 1047 1048#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1049template <class _Tp> 1050_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_function_v 1051 = is_function<_Tp>::value; 1052#endif 1053 1054template <class _Tp> struct __libcpp_is_member_pointer { 1055 enum { 1056 __is_member = false, 1057 __is_func = false, 1058 __is_obj = false 1059 }; 1060}; 1061template <class _Tp, class _Up> struct __libcpp_is_member_pointer<_Tp _Up::*> { 1062 enum { 1063 __is_member = true, 1064 __is_func = is_function<_Tp>::value, 1065 __is_obj = !__is_func, 1066 }; 1067}; 1068 1069#if __has_keyword(__is_member_function_pointer) 1070 1071template<class _Tp> 1072struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer 1073 : _BoolConstant<__is_member_function_pointer(_Tp)> { }; 1074 1075#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1076template <class _Tp> 1077_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_function_pointer_v 1078 = __is_member_function_pointer(_Tp); 1079#endif 1080 1081#else // __has_keyword(__is_member_function_pointer) 1082 1083template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer 1084 : public _BoolConstant< __libcpp_is_member_pointer<typename remove_cv<_Tp>::type>::__is_func > {}; 1085 1086#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1087template <class _Tp> 1088_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_function_pointer_v 1089 = is_member_function_pointer<_Tp>::value; 1090#endif 1091 1092#endif // __has_keyword(__is_member_function_pointer) 1093 1094// is_member_pointer 1095 1096#if __has_keyword(__is_member_pointer) 1097 1098template<class _Tp> 1099struct _LIBCPP_TEMPLATE_VIS is_member_pointer : _BoolConstant<__is_member_pointer(_Tp)> { }; 1100 1101#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1102template <class _Tp> 1103_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_pointer_v = __is_member_pointer(_Tp); 1104#endif 1105 1106#else // __has_keyword(__is_member_pointer) 1107 1108template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_pointer 1109 : public _BoolConstant< __libcpp_is_member_pointer<typename remove_cv<_Tp>::type>::__is_member > {}; 1110 1111#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1112template <class _Tp> 1113_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_pointer_v 1114 = is_member_pointer<_Tp>::value; 1115#endif 1116 1117#endif // __has_keyword(__is_member_pointer) 1118 1119// is_member_object_pointer 1120 1121#if __has_keyword(__is_member_object_pointer) 1122 1123template<class _Tp> 1124struct _LIBCPP_TEMPLATE_VIS is_member_object_pointer 1125 : _BoolConstant<__is_member_object_pointer(_Tp)> { }; 1126 1127#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1128template <class _Tp> 1129_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_object_pointer_v 1130 = __is_member_object_pointer(_Tp); 1131#endif 1132 1133#else // __has_keyword(__is_member_object_pointer) 1134 1135template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_object_pointer 1136 : public _BoolConstant< __libcpp_is_member_pointer<typename remove_cv<_Tp>::type>::__is_obj > {}; 1137 1138#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1139template <class _Tp> 1140_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_object_pointer_v 1141 = is_member_object_pointer<_Tp>::value; 1142#endif 1143 1144#endif // __has_keyword(__is_member_object_pointer) 1145 1146// is_enum 1147 1148#if __has_feature(is_enum) || defined(_LIBCPP_COMPILER_GCC) 1149 1150template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum 1151 : public integral_constant<bool, __is_enum(_Tp)> {}; 1152 1153#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1154template <class _Tp> 1155_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_enum_v = __is_enum(_Tp); 1156#endif 1157 1158#else 1159 1160template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum 1161 : public integral_constant<bool, !is_void<_Tp>::value && 1162 !is_integral<_Tp>::value && 1163 !is_floating_point<_Tp>::value && 1164 !is_array<_Tp>::value && 1165 !is_pointer<_Tp>::value && 1166 !is_reference<_Tp>::value && 1167 !is_member_pointer<_Tp>::value && 1168 !is_union<_Tp>::value && 1169 !is_class<_Tp>::value && 1170 !is_function<_Tp>::value > {}; 1171 1172#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1173template <class _Tp> 1174_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_enum_v 1175 = is_enum<_Tp>::value; 1176#endif 1177 1178#endif // __has_feature(is_enum) || defined(_LIBCPP_COMPILER_GCC) 1179 1180// is_arithmetic 1181 1182 1183template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_arithmetic 1184 : public integral_constant<bool, is_integral<_Tp>::value || 1185 is_floating_point<_Tp>::value> {}; 1186 1187#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1188template <class _Tp> 1189_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_arithmetic_v 1190 = is_arithmetic<_Tp>::value; 1191#endif 1192 1193// is_fundamental 1194 1195// In clang 9 and lower, this builtin did not work for nullptr_t. Additionally, in C++03 mode, 1196// nullptr isn't defined by the compiler so, this builtin won't work. 1197#if __has_keyword(__is_fundamental) && _LIBCPP_CLANG_VER > 900 && !defined(_LIBCPP_CXX03_LANG) 1198 1199template<class _Tp> 1200struct _LIBCPP_TEMPLATE_VIS is_fundamental : _BoolConstant<__is_fundamental(_Tp)> { }; 1201 1202#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1203template <class _Tp> 1204_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_fundamental_v = __is_fundamental(_Tp); 1205#endif 1206 1207#else // __has_keyword(__is_fundamental) 1208 1209template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_fundamental 1210 : public integral_constant<bool, is_void<_Tp>::value || 1211 __is_nullptr_t<_Tp>::value || 1212 is_arithmetic<_Tp>::value> {}; 1213 1214#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1215template <class _Tp> 1216_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_fundamental_v 1217 = is_fundamental<_Tp>::value; 1218#endif 1219 1220#endif // __has_keyword(__is_fundamental) 1221 1222// is_scalar 1223 1224// >= 11 because in C++03 nullptr isn't actually nullptr 1225#if __has_keyword(__is_scalar) && !defined(_LIBCPP_CXX03_LANG) 1226 1227template<class _Tp> 1228struct _LIBCPP_TEMPLATE_VIS is_scalar : _BoolConstant<__is_scalar(_Tp)> { }; 1229 1230#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1231template <class _Tp> 1232_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_scalar_v = __is_scalar(_Tp); 1233#endif 1234 1235#else // __has_keyword(__is_scalar) 1236 1237template <class _Tp> struct __is_block : false_type {}; 1238#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) 1239template <class _Rp, class ..._Args> struct __is_block<_Rp (^)(_Args...)> : true_type {}; 1240#endif 1241 1242template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_scalar 1243 : public integral_constant<bool, is_arithmetic<_Tp>::value || 1244 is_member_pointer<_Tp>::value || 1245 is_pointer<_Tp>::value || 1246 __is_nullptr_t<_Tp>::value || 1247 __is_block<_Tp>::value || 1248 is_enum<_Tp>::value > {}; 1249 1250template <> struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {}; 1251 1252#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1253template <class _Tp> 1254_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_scalar_v 1255 = is_scalar<_Tp>::value; 1256#endif 1257 1258#endif // __has_keyword(__is_scalar) 1259 1260// is_object 1261 1262#if __has_keyword(__is_object) 1263 1264template<class _Tp> 1265struct _LIBCPP_TEMPLATE_VIS is_object : _BoolConstant<__is_object(_Tp)> { }; 1266 1267#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1268template <class _Tp> 1269_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_object_v = __is_object(_Tp); 1270#endif 1271 1272#else // __has_keyword(__is_object) 1273 1274template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_object 1275 : public integral_constant<bool, is_scalar<_Tp>::value || 1276 is_array<_Tp>::value || 1277 is_union<_Tp>::value || 1278 is_class<_Tp>::value > {}; 1279 1280#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1281template <class _Tp> 1282_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_object_v 1283 = is_object<_Tp>::value; 1284#endif 1285 1286#endif // __has_keyword(__is_object) 1287 1288// is_compound 1289 1290// >= 11 because in C++03 nullptr isn't actually nullptr 1291#if __has_keyword(__is_compound) && !defined(_LIBCPP_CXX03_LANG) 1292 1293template<class _Tp> 1294struct _LIBCPP_TEMPLATE_VIS is_compound : _BoolConstant<__is_compound(_Tp)> { }; 1295 1296#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1297template <class _Tp> 1298_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_compound_v = __is_compound(_Tp); 1299#endif 1300 1301#else // __has_keyword(__is_compound) 1302 1303template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_compound 1304 : public integral_constant<bool, !is_fundamental<_Tp>::value> {}; 1305 1306#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1307template <class _Tp> 1308_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_compound_v 1309 = is_compound<_Tp>::value; 1310#endif 1311 1312#endif // __has_keyword(__is_compound) 1313 1314// __is_referenceable [defns.referenceable] 1315 1316struct __is_referenceable_impl { 1317 template <class _Tp> static _Tp& __test(int); 1318 template <class _Tp> static __two __test(...); 1319}; 1320 1321template <class _Tp> 1322struct __is_referenceable : integral_constant<bool, 1323 _IsNotSame<decltype(__is_referenceable_impl::__test<_Tp>(0)), __two>::value> {}; 1324 1325 1326// add_const 1327 1328template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_const { 1329 typedef _LIBCPP_NODEBUG_TYPE const _Tp type; 1330}; 1331 1332#if _LIBCPP_STD_VER > 11 1333template <class _Tp> using add_const_t = typename add_const<_Tp>::type; 1334#endif 1335 1336// add_volatile 1337 1338template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_volatile { 1339 typedef _LIBCPP_NODEBUG_TYPE volatile _Tp type; 1340}; 1341 1342#if _LIBCPP_STD_VER > 11 1343template <class _Tp> using add_volatile_t = typename add_volatile<_Tp>::type; 1344#endif 1345 1346// add_cv 1347template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_cv { 1348 typedef _LIBCPP_NODEBUG_TYPE const volatile _Tp type; 1349}; 1350 1351#if _LIBCPP_STD_VER > 11 1352template <class _Tp> using add_cv_t = typename add_cv<_Tp>::type; 1353#endif 1354 1355// remove_reference 1356 1357#if __has_keyword(__remove_reference) 1358 1359template<class _Tp> 1360struct _LIBCPP_TEMPLATE_VIS remove_reference { typedef __remove_reference(_Tp) type; }; 1361 1362#else // __has_keyword(__remove_reference) 1363 1364template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1365template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1366template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&&> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1367 1368#if _LIBCPP_STD_VER > 11 1369template <class _Tp> using remove_reference_t = typename remove_reference<_Tp>::type; 1370#endif 1371 1372#endif // __has_keyword(__remove_reference) 1373 1374// add_lvalue_reference 1375 1376template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_lvalue_reference_impl { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; 1377template <class _Tp > struct __add_lvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG_TYPE _Tp& type; }; 1378 1379template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_lvalue_reference 1380{typedef _LIBCPP_NODEBUG_TYPE typename __add_lvalue_reference_impl<_Tp>::type type;}; 1381 1382#if _LIBCPP_STD_VER > 11 1383template <class _Tp> using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; 1384#endif 1385 1386template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_rvalue_reference_impl { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; 1387template <class _Tp > struct __add_rvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG_TYPE _Tp&& type; }; 1388 1389template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_rvalue_reference 1390{typedef _LIBCPP_NODEBUG_TYPE typename __add_rvalue_reference_impl<_Tp>::type type;}; 1391 1392#if _LIBCPP_STD_VER > 11 1393template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; 1394#endif 1395 1396// Suppress deprecation notice for volatile-qualified return type resulting 1397// from volatile-qualified types _Tp. 1398_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1399template <class _Tp> _Tp&& __declval(int); 1400template <class _Tp> _Tp __declval(long); 1401_LIBCPP_SUPPRESS_DEPRECATED_POP 1402 1403template <class _Tp> 1404decltype(_VSTD::__declval<_Tp>(0)) 1405declval() _NOEXCEPT; 1406 1407// __uncvref 1408 1409template <class _Tp> 1410struct __uncvref { 1411 typedef _LIBCPP_NODEBUG_TYPE typename remove_cv<typename remove_reference<_Tp>::type>::type type; 1412}; 1413 1414template <class _Tp> 1415struct __unconstref { 1416 typedef _LIBCPP_NODEBUG_TYPE typename remove_const<typename remove_reference<_Tp>::type>::type type; 1417}; 1418 1419#ifndef _LIBCPP_CXX03_LANG 1420template <class _Tp> 1421using __uncvref_t _LIBCPP_NODEBUG_TYPE = typename __uncvref<_Tp>::type; 1422#endif 1423 1424// __is_same_uncvref 1425 1426template <class _Tp, class _Up> 1427struct __is_same_uncvref : _IsSame<typename __uncvref<_Tp>::type, 1428 typename __uncvref<_Up>::type> {}; 1429 1430#if _LIBCPP_STD_VER > 17 1431// remove_cvref - same as __uncvref 1432template <class _Tp> 1433struct remove_cvref : public __uncvref<_Tp> {}; 1434 1435template <class _Tp> using remove_cvref_t = typename remove_cvref<_Tp>::type; 1436#endif 1437 1438 1439struct __any 1440{ 1441 __any(...); 1442}; 1443 1444// remove_pointer 1445 1446template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1447template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1448template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1449template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1450template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1451 1452#if _LIBCPP_STD_VER > 11 1453template <class _Tp> using remove_pointer_t = typename remove_pointer<_Tp>::type; 1454#endif 1455 1456// add_pointer 1457 1458template <class _Tp, 1459 bool = __is_referenceable<_Tp>::value || 1460 _IsSame<typename remove_cv<_Tp>::type, void>::value> 1461struct __add_pointer_impl 1462 {typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type* type;}; 1463template <class _Tp> struct __add_pointer_impl<_Tp, false> 1464 {typedef _LIBCPP_NODEBUG_TYPE _Tp type;}; 1465 1466template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_pointer 1467 {typedef _LIBCPP_NODEBUG_TYPE typename __add_pointer_impl<_Tp>::type type;}; 1468 1469#if _LIBCPP_STD_VER > 11 1470template <class _Tp> using add_pointer_t = typename add_pointer<_Tp>::type; 1471#endif 1472 1473// type_identity 1474#if _LIBCPP_STD_VER > 17 1475template<class _Tp> struct type_identity { typedef _Tp type; }; 1476template<class _Tp> using type_identity_t = typename type_identity<_Tp>::type; 1477#endif 1478 1479// is_signed 1480 1481// In clang 9 and earlier, this builtin did not work for floating points or enums 1482#if __has_keyword(__is_signed) && _LIBCPP_CLANG_VER > 900 1483 1484template<class _Tp> 1485struct _LIBCPP_TEMPLATE_VIS is_signed : _BoolConstant<__is_signed(_Tp)> { }; 1486 1487#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1488template <class _Tp> 1489_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_signed_v = __is_signed(_Tp); 1490#endif 1491 1492#else // __has_keyword(__is_signed) 1493 1494template <class _Tp, bool = is_integral<_Tp>::value> 1495struct __libcpp_is_signed_impl : public _LIBCPP_BOOL_CONSTANT(_Tp(-1) < _Tp(0)) {}; 1496 1497template <class _Tp> 1498struct __libcpp_is_signed_impl<_Tp, false> : public true_type {}; // floating point 1499 1500template <class _Tp, bool = is_arithmetic<_Tp>::value> 1501struct __libcpp_is_signed : public __libcpp_is_signed_impl<_Tp> {}; 1502 1503template <class _Tp> struct __libcpp_is_signed<_Tp, false> : public false_type {}; 1504 1505template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_signed : public __libcpp_is_signed<_Tp> {}; 1506 1507#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1508template <class _Tp> 1509_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_signed_v 1510 = is_signed<_Tp>::value; 1511#endif 1512 1513#endif // __has_keyword(__is_signed) 1514 1515// is_unsigned 1516 1517#if __has_keyword(__is_unsigned) 1518 1519template<class _Tp> 1520struct _LIBCPP_TEMPLATE_VIS is_unsigned : _BoolConstant<__is_unsigned(_Tp)> { }; 1521 1522#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1523template <class _Tp> 1524_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_unsigned_v = __is_unsigned(_Tp); 1525#endif 1526 1527#else // __has_keyword(__is_unsigned) 1528 1529template <class _Tp, bool = is_integral<_Tp>::value> 1530struct __libcpp_is_unsigned_impl : public _LIBCPP_BOOL_CONSTANT(_Tp(0) < _Tp(-1)) {}; 1531 1532template <class _Tp> 1533struct __libcpp_is_unsigned_impl<_Tp, false> : public false_type {}; // floating point 1534 1535template <class _Tp, bool = is_arithmetic<_Tp>::value> 1536struct __libcpp_is_unsigned : public __libcpp_is_unsigned_impl<_Tp> {}; 1537 1538template <class _Tp> struct __libcpp_is_unsigned<_Tp, false> : public false_type {}; 1539 1540template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unsigned : public __libcpp_is_unsigned<_Tp> {}; 1541 1542#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1543template <class _Tp> 1544_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_unsigned_v 1545 = is_unsigned<_Tp>::value; 1546#endif 1547 1548#endif // __has_keyword(__is_unsigned) 1549 1550// rank 1551 1552template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank 1553 : public integral_constant<size_t, 0> {}; 1554template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[]> 1555 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 1556template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[_Np]> 1557 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 1558 1559#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1560template <class _Tp> 1561_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t rank_v 1562 = rank<_Tp>::value; 1563#endif 1564 1565// extent 1566 1567#if __has_keyword(__array_extent) 1568 1569template<class _Tp, size_t _Dim = 0> 1570struct _LIBCPP_TEMPLATE_VIS extent 1571 : integral_constant<size_t, __array_extent(_Tp, _Dim)> { }; 1572 1573#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1574template <class _Tp, unsigned _Ip = 0> 1575_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t extent_v = __array_extent(_Tp, _Ip); 1576#endif 1577 1578#else // __has_keyword(__array_extent) 1579 1580template <class _Tp, unsigned _Ip = 0> struct _LIBCPP_TEMPLATE_VIS extent 1581 : public integral_constant<size_t, 0> {}; 1582template <class _Tp> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[], 0> 1583 : public integral_constant<size_t, 0> {}; 1584template <class _Tp, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[], _Ip> 1585 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 1586template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], 0> 1587 : public integral_constant<size_t, _Np> {}; 1588template <class _Tp, size_t _Np, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], _Ip> 1589 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 1590 1591#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1592template <class _Tp, unsigned _Ip = 0> 1593_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t extent_v 1594 = extent<_Tp, _Ip>::value; 1595#endif 1596 1597#endif // __has_keyword(__array_extent) 1598 1599// remove_extent 1600 1601template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent 1602 {typedef _Tp type;}; 1603template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[]> 1604 {typedef _Tp type;}; 1605template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[_Np]> 1606 {typedef _Tp type;}; 1607 1608#if _LIBCPP_STD_VER > 11 1609template <class _Tp> using remove_extent_t = typename remove_extent<_Tp>::type; 1610#endif 1611 1612// remove_all_extents 1613 1614template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents 1615 {typedef _Tp type;}; 1616template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[]> 1617 {typedef typename remove_all_extents<_Tp>::type type;}; 1618template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[_Np]> 1619 {typedef typename remove_all_extents<_Tp>::type type;}; 1620 1621#if _LIBCPP_STD_VER > 11 1622template <class _Tp> using remove_all_extents_t = typename remove_all_extents<_Tp>::type; 1623#endif 1624 1625#if _LIBCPP_STD_VER > 17 1626// is_bounded_array 1627 1628template <class> struct _LIBCPP_TEMPLATE_VIS is_bounded_array : false_type {}; 1629template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_bounded_array<_Tp[_Np]> : true_type {}; 1630 1631template <class _Tp> 1632_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR 1633bool is_bounded_array_v = is_bounded_array<_Tp>::value; 1634 1635// is_unbounded_array 1636 1637template <class> struct _LIBCPP_TEMPLATE_VIS is_unbounded_array : false_type {}; 1638template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unbounded_array<_Tp[]> : true_type {}; 1639 1640template <class _Tp> 1641_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR 1642bool is_unbounded_array_v = is_unbounded_array<_Tp>::value; 1643#endif 1644 1645// decay 1646 1647template <class _Up, bool> 1648struct __decay { 1649 typedef _LIBCPP_NODEBUG_TYPE typename remove_cv<_Up>::type type; 1650}; 1651 1652template <class _Up> 1653struct __decay<_Up, true> { 1654public: 1655 typedef _LIBCPP_NODEBUG_TYPE typename conditional 1656 < 1657 is_array<_Up>::value, 1658 typename remove_extent<_Up>::type*, 1659 typename conditional 1660 < 1661 is_function<_Up>::value, 1662 typename add_pointer<_Up>::type, 1663 typename remove_cv<_Up>::type 1664 >::type 1665 >::type type; 1666}; 1667 1668template <class _Tp> 1669struct _LIBCPP_TEMPLATE_VIS decay 1670{ 1671private: 1672 typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type _Up; 1673public: 1674 typedef _LIBCPP_NODEBUG_TYPE typename __decay<_Up, __is_referenceable<_Up>::value>::type type; 1675}; 1676 1677#if _LIBCPP_STD_VER > 11 1678template <class _Tp> using decay_t = typename decay<_Tp>::type; 1679#endif 1680 1681// is_abstract 1682 1683template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_abstract 1684 : public integral_constant<bool, __is_abstract(_Tp)> {}; 1685 1686#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1687template <class _Tp> 1688_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_abstract_v 1689 = is_abstract<_Tp>::value; 1690#endif 1691 1692// is_final 1693 1694template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1695__libcpp_is_final : public integral_constant<bool, __is_final(_Tp)> {}; 1696 1697#if _LIBCPP_STD_VER > 11 1698template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1699is_final : public integral_constant<bool, __is_final(_Tp)> {}; 1700#endif 1701 1702#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1703template <class _Tp> 1704_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_final_v 1705 = is_final<_Tp>::value; 1706#endif 1707 1708// is_aggregate 1709#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_IS_AGGREGATE) 1710 1711template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1712is_aggregate : public integral_constant<bool, __is_aggregate(_Tp)> {}; 1713 1714#if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1715template <class _Tp> 1716_LIBCPP_INLINE_VAR constexpr bool is_aggregate_v 1717 = is_aggregate<_Tp>::value; 1718#endif 1719 1720#endif // _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_IS_AGGREGATE) 1721 1722// is_base_of 1723 1724template <class _Bp, class _Dp> 1725struct _LIBCPP_TEMPLATE_VIS is_base_of 1726 : public integral_constant<bool, __is_base_of(_Bp, _Dp)> {}; 1727 1728#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1729template <class _Bp, class _Dp> 1730_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_base_of_v 1731 = is_base_of<_Bp, _Dp>::value; 1732#endif 1733 1734// is_convertible 1735 1736#if __has_feature(is_convertible_to) && !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK) 1737 1738template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS is_convertible 1739 : public integral_constant<bool, __is_convertible_to(_T1, _T2)> {}; 1740 1741#else // __has_feature(is_convertible_to) 1742 1743namespace __is_convertible_imp 1744{ 1745template <class _Tp> void __test_convert(_Tp); 1746 1747template <class _From, class _To, class = void> 1748struct __is_convertible_test : public false_type {}; 1749 1750template <class _From, class _To> 1751struct __is_convertible_test<_From, _To, 1752 decltype(_VSTD::__is_convertible_imp::__test_convert<_To>(_VSTD::declval<_From>()))> : public true_type 1753{}; 1754 1755template <class _Tp, bool _IsArray = is_array<_Tp>::value, 1756 bool _IsFunction = is_function<_Tp>::value, 1757 bool _IsVoid = is_void<_Tp>::value> 1758 struct __is_array_function_or_void {enum {value = 0};}; 1759template <class _Tp> struct __is_array_function_or_void<_Tp, true, false, false> {enum {value = 1};}; 1760template <class _Tp> struct __is_array_function_or_void<_Tp, false, true, false> {enum {value = 2};}; 1761template <class _Tp> struct __is_array_function_or_void<_Tp, false, false, true> {enum {value = 3};}; 1762} 1763 1764template <class _Tp, 1765 unsigned = __is_convertible_imp::__is_array_function_or_void<typename remove_reference<_Tp>::type>::value> 1766struct __is_convertible_check 1767{ 1768 static const size_t __v = 0; 1769}; 1770 1771template <class _Tp> 1772struct __is_convertible_check<_Tp, 0> 1773{ 1774 static const size_t __v = sizeof(_Tp); 1775}; 1776 1777template <class _T1, class _T2, 1778 unsigned _T1_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T1>::value, 1779 unsigned _T2_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T2>::value> 1780struct __is_convertible 1781 : public integral_constant<bool, 1782 __is_convertible_imp::__is_convertible_test<_T1, _T2>::value 1783 > 1784{}; 1785 1786template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 1> : public false_type {}; 1787template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 1> : public false_type {}; 1788template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 1> : public false_type {}; 1789template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 1> : public false_type {}; 1790 1791template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 2> : public false_type {}; 1792template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 2> : public false_type {}; 1793template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 2> : public false_type {}; 1794template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 2> : public false_type {}; 1795 1796template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 3> : public false_type {}; 1797template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 3> : public false_type {}; 1798template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 3> : public false_type {}; 1799template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 3> : public true_type {}; 1800 1801template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS is_convertible 1802 : public __is_convertible<_T1, _T2> 1803{ 1804 static const size_t __complete_check1 = __is_convertible_check<_T1>::__v; 1805 static const size_t __complete_check2 = __is_convertible_check<_T2>::__v; 1806}; 1807 1808#endif // __has_feature(is_convertible_to) 1809 1810#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1811template <class _From, class _To> 1812_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_convertible_v 1813 = is_convertible<_From, _To>::value; 1814#endif 1815 1816// is_nothrow_convertible 1817 1818#if _LIBCPP_STD_VER > 17 1819 1820template <typename _Tp> 1821static void __test_noexcept(_Tp) noexcept; 1822 1823template<typename _Fm, typename _To> 1824static bool_constant<noexcept(_VSTD::__test_noexcept<_To>(declval<_Fm>()))> 1825__is_nothrow_convertible_test(); 1826 1827template <typename _Fm, typename _To> 1828struct __is_nothrow_convertible_helper: decltype(__is_nothrow_convertible_test<_Fm, _To>()) 1829{ }; 1830 1831template <typename _Fm, typename _To> 1832struct is_nothrow_convertible : _Or< 1833 _And<is_void<_To>, is_void<_Fm>>, 1834 _Lazy<_And, is_convertible<_Fm, _To>, __is_nothrow_convertible_helper<_Fm, _To>> 1835>::type { }; 1836 1837template <typename _Fm, typename _To> 1838inline constexpr bool is_nothrow_convertible_v = is_nothrow_convertible<_Fm, _To>::value; 1839 1840#endif // _LIBCPP_STD_VER > 17 1841 1842// is_empty 1843 1844#if __has_feature(is_empty) || defined(_LIBCPP_COMPILER_GCC) 1845 1846template <class _Tp> 1847struct _LIBCPP_TEMPLATE_VIS is_empty 1848 : public integral_constant<bool, __is_empty(_Tp)> {}; 1849 1850#else // __has_feature(is_empty) 1851 1852template <class _Tp> 1853struct __is_empty1 1854 : public _Tp 1855{ 1856 double __lx; 1857}; 1858 1859struct __is_empty2 1860{ 1861 double __lx; 1862}; 1863 1864template <class _Tp, bool = is_class<_Tp>::value> 1865struct __libcpp_empty : public integral_constant<bool, sizeof(__is_empty1<_Tp>) == sizeof(__is_empty2)> {}; 1866 1867template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {}; 1868 1869template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_empty : public __libcpp_empty<_Tp> {}; 1870 1871#endif // __has_feature(is_empty) 1872 1873#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1874template <class _Tp> 1875_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_empty_v 1876 = is_empty<_Tp>::value; 1877#endif 1878 1879// is_polymorphic 1880 1881#if __has_feature(is_polymorphic) || defined(_LIBCPP_COMPILER_MSVC) 1882 1883template <class _Tp> 1884struct _LIBCPP_TEMPLATE_VIS is_polymorphic 1885 : public integral_constant<bool, __is_polymorphic(_Tp)> {}; 1886 1887#else 1888 1889template<typename _Tp> char &__is_polymorphic_impl( 1890 typename enable_if<sizeof((_Tp*)dynamic_cast<const volatile void*>(declval<_Tp*>())) != 0, 1891 int>::type); 1892template<typename _Tp> __two &__is_polymorphic_impl(...); 1893 1894template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_polymorphic 1895 : public integral_constant<bool, sizeof(__is_polymorphic_impl<_Tp>(0)) == 1> {}; 1896 1897#endif // __has_feature(is_polymorphic) 1898 1899#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1900template <class _Tp> 1901_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_polymorphic_v 1902 = is_polymorphic<_Tp>::value; 1903#endif 1904 1905// has_virtual_destructor 1906 1907#if __has_feature(has_virtual_destructor) || defined(_LIBCPP_COMPILER_GCC) 1908 1909template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor 1910 : public integral_constant<bool, __has_virtual_destructor(_Tp)> {}; 1911 1912#else 1913 1914template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor 1915 : public false_type {}; 1916 1917#endif 1918 1919#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1920template <class _Tp> 1921_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool has_virtual_destructor_v 1922 = has_virtual_destructor<_Tp>::value; 1923#endif 1924 1925// has_unique_object_representations 1926 1927#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS) 1928 1929template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_unique_object_representations 1930 : public integral_constant<bool, 1931 __has_unique_object_representations(remove_cv_t<remove_all_extents_t<_Tp>>)> {}; 1932 1933#if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1934template <class _Tp> 1935_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool has_unique_object_representations_v 1936 = has_unique_object_representations<_Tp>::value; 1937#endif 1938 1939#endif 1940 1941// alignment_of 1942 1943template <class _Tp> struct _LIBCPP_TEMPLATE_VIS alignment_of 1944 : public integral_constant<size_t, _LIBCPP_ALIGNOF(_Tp)> {}; 1945 1946#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1947template <class _Tp> 1948_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t alignment_of_v 1949 = alignment_of<_Tp>::value; 1950#endif 1951 1952// aligned_storage 1953 1954template <class _Hp, class _Tp> 1955struct __type_list 1956{ 1957 typedef _Hp _Head; 1958 typedef _Tp _Tail; 1959}; 1960 1961struct __nat 1962{ 1963#ifndef _LIBCPP_CXX03_LANG 1964 __nat() = delete; 1965 __nat(const __nat&) = delete; 1966 __nat& operator=(const __nat&) = delete; 1967 ~__nat() = delete; 1968#endif 1969}; 1970 1971template <class _Tp> 1972struct __align_type 1973{ 1974 static const size_t value = _LIBCPP_PREFERRED_ALIGNOF(_Tp); 1975 typedef _Tp type; 1976}; 1977 1978struct __struct_double {long double __lx;}; 1979struct __struct_double4 {double __lx[4];}; 1980 1981typedef 1982 __type_list<__align_type<unsigned char>, 1983 __type_list<__align_type<unsigned short>, 1984 __type_list<__align_type<unsigned int>, 1985 __type_list<__align_type<unsigned long>, 1986 __type_list<__align_type<unsigned long long>, 1987 __type_list<__align_type<double>, 1988 __type_list<__align_type<long double>, 1989 __type_list<__align_type<__struct_double>, 1990 __type_list<__align_type<__struct_double4>, 1991 __type_list<__align_type<int*>, 1992 __nat 1993 > > > > > > > > > > __all_types; 1994 1995template <size_t _Align> 1996struct _ALIGNAS(_Align) __fallback_overaligned {}; 1997 1998template <class _TL, size_t _Align> struct __find_pod; 1999 2000template <class _Hp, size_t _Align> 2001struct __find_pod<__type_list<_Hp, __nat>, _Align> 2002{ 2003 typedef typename conditional< 2004 _Align == _Hp::value, 2005 typename _Hp::type, 2006 __fallback_overaligned<_Align> 2007 >::type type; 2008}; 2009 2010template <class _Hp, class _Tp, size_t _Align> 2011struct __find_pod<__type_list<_Hp, _Tp>, _Align> 2012{ 2013 typedef typename conditional< 2014 _Align == _Hp::value, 2015 typename _Hp::type, 2016 typename __find_pod<_Tp, _Align>::type 2017 >::type type; 2018}; 2019 2020template <class _TL, size_t _Len> struct __find_max_align; 2021 2022template <class _Hp, size_t _Len> 2023struct __find_max_align<__type_list<_Hp, __nat>, _Len> : public integral_constant<size_t, _Hp::value> {}; 2024 2025template <size_t _Len, size_t _A1, size_t _A2> 2026struct __select_align 2027{ 2028private: 2029 static const size_t __min = _A2 < _A1 ? _A2 : _A1; 2030 static const size_t __max = _A1 < _A2 ? _A2 : _A1; 2031public: 2032 static const size_t value = _Len < __max ? __min : __max; 2033}; 2034 2035template <class _Hp, class _Tp, size_t _Len> 2036struct __find_max_align<__type_list<_Hp, _Tp>, _Len> 2037 : public integral_constant<size_t, __select_align<_Len, _Hp::value, __find_max_align<_Tp, _Len>::value>::value> {}; 2038 2039template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value> 2040struct _LIBCPP_TEMPLATE_VIS aligned_storage 2041{ 2042 typedef typename __find_pod<__all_types, _Align>::type _Aligner; 2043 union type 2044 { 2045 _Aligner __align; 2046 unsigned char __data[(_Len + _Align - 1)/_Align * _Align]; 2047 }; 2048}; 2049 2050#if _LIBCPP_STD_VER > 11 2051template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value> 2052 using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; 2053#endif 2054 2055#define _CREATE_ALIGNED_STORAGE_SPECIALIZATION(n) \ 2056template <size_t _Len>\ 2057struct _LIBCPP_TEMPLATE_VIS aligned_storage<_Len, n>\ 2058{\ 2059 struct _ALIGNAS(n) type\ 2060 {\ 2061 unsigned char __lx[(_Len + n - 1)/n * n];\ 2062 };\ 2063} 2064 2065_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1); 2066_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2); 2067_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4); 2068_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x8); 2069_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x10); 2070_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x20); 2071_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x40); 2072_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x80); 2073_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x100); 2074_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x200); 2075_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x400); 2076_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800); 2077_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000); 2078_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000); 2079// PE/COFF does not support alignment beyond 8192 (=0x2000) 2080#if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 2081_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000); 2082#endif // !defined(_LIBCPP_OBJECT_FORMAT_COFF) 2083 2084#undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION 2085 2086 2087// aligned_union 2088 2089template <size_t _I0, size_t ..._In> 2090struct __static_max; 2091 2092template <size_t _I0> 2093struct __static_max<_I0> 2094{ 2095 static const size_t value = _I0; 2096}; 2097 2098template <size_t _I0, size_t _I1, size_t ..._In> 2099struct __static_max<_I0, _I1, _In...> 2100{ 2101 static const size_t value = _I0 >= _I1 ? __static_max<_I0, _In...>::value : 2102 __static_max<_I1, _In...>::value; 2103}; 2104 2105template <size_t _Len, class _Type0, class ..._Types> 2106struct aligned_union 2107{ 2108 static const size_t alignment_value = __static_max<_LIBCPP_PREFERRED_ALIGNOF(_Type0), 2109 _LIBCPP_PREFERRED_ALIGNOF(_Types)...>::value; 2110 static const size_t __len = __static_max<_Len, sizeof(_Type0), 2111 sizeof(_Types)...>::value; 2112 typedef typename aligned_storage<__len, alignment_value>::type type; 2113}; 2114 2115#if _LIBCPP_STD_VER > 11 2116template <size_t _Len, class ..._Types> using aligned_union_t = typename aligned_union<_Len, _Types...>::type; 2117#endif 2118 2119template <class _Tp> 2120struct __numeric_type 2121{ 2122 static void __test(...); 2123 static float __test(float); 2124 static double __test(char); 2125 static double __test(int); 2126 static double __test(unsigned); 2127 static double __test(long); 2128 static double __test(unsigned long); 2129 static double __test(long long); 2130 static double __test(unsigned long long); 2131 static double __test(double); 2132 static long double __test(long double); 2133 2134 typedef decltype(__test(declval<_Tp>())) type; 2135 static const bool value = _IsNotSame<type, void>::value; 2136}; 2137 2138template <> 2139struct __numeric_type<void> 2140{ 2141 static const bool value = true; 2142}; 2143 2144// __promote 2145 2146template <class _A1, class _A2 = void, class _A3 = void, 2147 bool = __numeric_type<_A1>::value && 2148 __numeric_type<_A2>::value && 2149 __numeric_type<_A3>::value> 2150class __promote_imp 2151{ 2152public: 2153 static const bool value = false; 2154}; 2155 2156template <class _A1, class _A2, class _A3> 2157class __promote_imp<_A1, _A2, _A3, true> 2158{ 2159private: 2160 typedef typename __promote_imp<_A1>::type __type1; 2161 typedef typename __promote_imp<_A2>::type __type2; 2162 typedef typename __promote_imp<_A3>::type __type3; 2163public: 2164 typedef decltype(__type1() + __type2() + __type3()) type; 2165 static const bool value = true; 2166}; 2167 2168template <class _A1, class _A2> 2169class __promote_imp<_A1, _A2, void, true> 2170{ 2171private: 2172 typedef typename __promote_imp<_A1>::type __type1; 2173 typedef typename __promote_imp<_A2>::type __type2; 2174public: 2175 typedef decltype(__type1() + __type2()) type; 2176 static const bool value = true; 2177}; 2178 2179template <class _A1> 2180class __promote_imp<_A1, void, void, true> 2181{ 2182public: 2183 typedef typename __numeric_type<_A1>::type type; 2184 static const bool value = true; 2185}; 2186 2187template <class _A1, class _A2 = void, class _A3 = void> 2188class __promote : public __promote_imp<_A1, _A2, _A3> {}; 2189 2190// make_signed / make_unsigned 2191 2192typedef 2193 __type_list<signed char, 2194 __type_list<signed short, 2195 __type_list<signed int, 2196 __type_list<signed long, 2197 __type_list<signed long long, 2198#ifndef _LIBCPP_HAS_NO_INT128 2199 __type_list<__int128_t, 2200#endif 2201 __nat 2202#ifndef _LIBCPP_HAS_NO_INT128 2203 > 2204#endif 2205 > > > > > __signed_types; 2206 2207typedef 2208 __type_list<unsigned char, 2209 __type_list<unsigned short, 2210 __type_list<unsigned int, 2211 __type_list<unsigned long, 2212 __type_list<unsigned long long, 2213#ifndef _LIBCPP_HAS_NO_INT128 2214 __type_list<__uint128_t, 2215#endif 2216 __nat 2217#ifndef _LIBCPP_HAS_NO_INT128 2218 > 2219#endif 2220 > > > > > __unsigned_types; 2221 2222template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> struct __find_first; 2223 2224template <class _Hp, class _Tp, size_t _Size> 2225struct __find_first<__type_list<_Hp, _Tp>, _Size, true> 2226{ 2227 typedef _LIBCPP_NODEBUG_TYPE _Hp type; 2228}; 2229 2230template <class _Hp, class _Tp, size_t _Size> 2231struct __find_first<__type_list<_Hp, _Tp>, _Size, false> 2232{ 2233 typedef _LIBCPP_NODEBUG_TYPE typename __find_first<_Tp, _Size>::type type; 2234}; 2235 2236template <class _Tp, class _Up, bool = is_const<typename remove_reference<_Tp>::type>::value, 2237 bool = is_volatile<typename remove_reference<_Tp>::type>::value> 2238struct __apply_cv 2239{ 2240 typedef _LIBCPP_NODEBUG_TYPE _Up type; 2241}; 2242 2243template <class _Tp, class _Up> 2244struct __apply_cv<_Tp, _Up, true, false> 2245{ 2246 typedef _LIBCPP_NODEBUG_TYPE const _Up type; 2247}; 2248 2249template <class _Tp, class _Up> 2250struct __apply_cv<_Tp, _Up, false, true> 2251{ 2252 typedef volatile _Up type; 2253}; 2254 2255template <class _Tp, class _Up> 2256struct __apply_cv<_Tp, _Up, true, true> 2257{ 2258 typedef const volatile _Up type; 2259}; 2260 2261template <class _Tp, class _Up> 2262struct __apply_cv<_Tp&, _Up, false, false> 2263{ 2264 typedef _Up& type; 2265}; 2266 2267template <class _Tp, class _Up> 2268struct __apply_cv<_Tp&, _Up, true, false> 2269{ 2270 typedef const _Up& type; 2271}; 2272 2273template <class _Tp, class _Up> 2274struct __apply_cv<_Tp&, _Up, false, true> 2275{ 2276 typedef volatile _Up& type; 2277}; 2278 2279template <class _Tp, class _Up> 2280struct __apply_cv<_Tp&, _Up, true, true> 2281{ 2282 typedef const volatile _Up& type; 2283}; 2284 2285template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 2286struct __make_signed {}; 2287 2288template <class _Tp> 2289struct __make_signed<_Tp, true> 2290{ 2291 typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; 2292}; 2293 2294template <> struct __make_signed<bool, true> {}; 2295template <> struct __make_signed< signed short, true> {typedef short type;}; 2296template <> struct __make_signed<unsigned short, true> {typedef short type;}; 2297template <> struct __make_signed< signed int, true> {typedef int type;}; 2298template <> struct __make_signed<unsigned int, true> {typedef int type;}; 2299template <> struct __make_signed< signed long, true> {typedef long type;}; 2300template <> struct __make_signed<unsigned long, true> {typedef long type;}; 2301template <> struct __make_signed< signed long long, true> {typedef long long type;}; 2302template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; 2303#ifndef _LIBCPP_HAS_NO_INT128 2304template <> struct __make_signed<__int128_t, true> {typedef __int128_t type;}; 2305template <> struct __make_signed<__uint128_t, true> {typedef __int128_t type;}; 2306#endif 2307 2308template <class _Tp> 2309struct _LIBCPP_TEMPLATE_VIS make_signed 2310{ 2311 typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; 2312}; 2313 2314#if _LIBCPP_STD_VER > 11 2315template <class _Tp> using make_signed_t = typename make_signed<_Tp>::type; 2316#endif 2317 2318template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 2319struct __make_unsigned {}; 2320 2321template <class _Tp> 2322struct __make_unsigned<_Tp, true> 2323{ 2324 typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type; 2325}; 2326 2327template <> struct __make_unsigned<bool, true> {}; 2328template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;}; 2329template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;}; 2330template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;}; 2331template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;}; 2332template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;}; 2333template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;}; 2334template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;}; 2335template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;}; 2336#ifndef _LIBCPP_HAS_NO_INT128 2337template <> struct __make_unsigned<__int128_t, true> {typedef __uint128_t type;}; 2338template <> struct __make_unsigned<__uint128_t, true> {typedef __uint128_t type;}; 2339#endif 2340 2341template <class _Tp> 2342struct _LIBCPP_TEMPLATE_VIS make_unsigned 2343{ 2344 typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type; 2345}; 2346 2347#if _LIBCPP_STD_VER > 11 2348template <class _Tp> using make_unsigned_t = typename make_unsigned<_Tp>::type; 2349#endif 2350 2351#if _LIBCPP_STD_VER > 14 2352template <class...> using void_t = void; 2353#endif 2354 2355#if _LIBCPP_STD_VER > 17 2356// Let COND_RES(X, Y) be: 2357template <class _Tp, class _Up> 2358using __cond_type = decltype(false ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>()); 2359 2360template <class _Tp, class _Up, class = void> 2361struct __common_type3 {}; 2362 2363// sub-bullet 4 - "if COND_RES(CREF(D1), CREF(D2)) denotes a type..." 2364template <class _Tp, class _Up> 2365struct __common_type3<_Tp, _Up, void_t<__cond_type<const _Tp&, const _Up&>>> 2366{ 2367 using type = remove_cvref_t<__cond_type<const _Tp&, const _Up&>>; 2368}; 2369 2370template <class _Tp, class _Up, class = void> 2371struct __common_type2_imp : __common_type3<_Tp, _Up> {}; 2372#else 2373template <class _Tp, class _Up, class = void> 2374struct __common_type2_imp {}; 2375#endif 2376 2377// sub-bullet 3 - "if decay_t<decltype(false ? declval<D1>() : declval<D2>())> ..." 2378template <class _Tp, class _Up> 2379struct __common_type2_imp<_Tp, _Up, 2380 typename __void_t<decltype( 2381 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2382 )>::type> 2383{ 2384 typedef _LIBCPP_NODEBUG_TYPE typename decay<decltype( 2385 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2386 )>::type type; 2387}; 2388 2389template <class, class = void> 2390struct __common_type_impl {}; 2391 2392// Clang provides variadic templates in C++03 as an extension. 2393#if !defined(_LIBCPP_CXX03_LANG) || defined(__clang__) 2394# define _LIBCPP_OPTIONAL_PACK(...) , __VA_ARGS__ 2395template <class... Tp> 2396struct __common_types; 2397template <class... _Tp> 2398struct _LIBCPP_TEMPLATE_VIS common_type; 2399#else 2400# define _LIBCPP_OPTIONAL_PACK(...) 2401struct __no_arg; 2402template <class _Tp, class _Up, class = __no_arg> 2403struct __common_types; 2404template <class _Tp = __no_arg, class _Up = __no_arg, class _Vp = __no_arg, 2405 class _Unused = __no_arg> 2406struct common_type { 2407 static_assert(sizeof(_Unused) == 0, 2408 "common_type accepts at most 3 arguments in C++03"); 2409}; 2410#endif // _LIBCPP_CXX03_LANG 2411 2412template <class _Tp, class _Up> 2413struct __common_type_impl< 2414 __common_types<_Tp, _Up>, 2415 typename __void_t<typename common_type<_Tp, _Up>::type>::type> 2416{ 2417 typedef typename common_type<_Tp, _Up>::type type; 2418}; 2419 2420template <class _Tp, class _Up, class _Vp _LIBCPP_OPTIONAL_PACK(class... _Rest)> 2421struct __common_type_impl< 2422 __common_types<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)>, 2423 typename __void_t<typename common_type<_Tp, _Up>::type>::type> 2424 : __common_type_impl<__common_types<typename common_type<_Tp, _Up>::type, 2425 _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> > { 2426}; 2427 2428// bullet 1 - sizeof...(Tp) == 0 2429 2430template <> 2431struct _LIBCPP_TEMPLATE_VIS common_type<> {}; 2432 2433// bullet 2 - sizeof...(Tp) == 1 2434 2435template <class _Tp> 2436struct _LIBCPP_TEMPLATE_VIS common_type<_Tp> 2437 : public common_type<_Tp, _Tp> {}; 2438 2439// bullet 3 - sizeof...(Tp) == 2 2440 2441// sub-bullet 1 - "If is_same_v<T1, D1> is false or ..." 2442template <class _Tp, class _Up> 2443struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, _Up> 2444 : conditional< 2445 _IsSame<_Tp, typename decay<_Tp>::type>::value && _IsSame<_Up, typename decay<_Up>::type>::value, 2446 __common_type2_imp<_Tp, _Up>, 2447 common_type<typename decay<_Tp>::type, typename decay<_Up>::type> 2448 >::type 2449{}; 2450 2451// bullet 4 - sizeof...(Tp) > 2 2452 2453template <class _Tp, class _Up, class _Vp _LIBCPP_OPTIONAL_PACK(class... _Rest)> 2454struct _LIBCPP_TEMPLATE_VIS 2455 common_type<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> 2456 : __common_type_impl< 2457 __common_types<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> > {}; 2458 2459#undef _LIBCPP_OPTIONAL_PACK 2460 2461#if _LIBCPP_STD_VER > 11 2462template <class ..._Tp> using common_type_t = typename common_type<_Tp...>::type; 2463#endif 2464 2465// is_assignable 2466 2467template<typename, typename _Tp> struct __select_2nd { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; 2468 2469#if __has_keyword(__is_assignable) 2470 2471template<class _Tp, class _Up> 2472struct _LIBCPP_TEMPLATE_VIS is_assignable : _BoolConstant<__is_assignable(_Tp, _Up)> { }; 2473 2474#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2475template <class _Tp, class _Arg> 2476_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_assignable_v = __is_assignable(_Tp, _Arg); 2477#endif 2478 2479#else // __has_keyword(__is_assignable) 2480 2481template <class _Tp, class _Arg> 2482typename __select_2nd<decltype((_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>())), true_type>::type 2483__is_assignable_test(int); 2484 2485template <class, class> 2486false_type __is_assignable_test(...); 2487 2488 2489template <class _Tp, class _Arg, bool = is_void<_Tp>::value || is_void<_Arg>::value> 2490struct __is_assignable_imp 2491 : public decltype((_VSTD::__is_assignable_test<_Tp, _Arg>(0))) {}; 2492 2493template <class _Tp, class _Arg> 2494struct __is_assignable_imp<_Tp, _Arg, true> 2495 : public false_type 2496{ 2497}; 2498 2499template <class _Tp, class _Arg> 2500struct is_assignable 2501 : public __is_assignable_imp<_Tp, _Arg> {}; 2502 2503#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2504template <class _Tp, class _Arg> 2505_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_assignable_v 2506 = is_assignable<_Tp, _Arg>::value; 2507#endif 2508 2509#endif // __has_keyword(__is_assignable) 2510 2511// is_copy_assignable 2512 2513template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_copy_assignable 2514 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 2515 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 2516 2517#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2518template <class _Tp> 2519_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_assignable_v 2520 = is_copy_assignable<_Tp>::value; 2521#endif 2522 2523// is_move_assignable 2524 2525template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_move_assignable 2526 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 2527 typename add_rvalue_reference<_Tp>::type> {}; 2528 2529#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2530template <class _Tp> 2531_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_assignable_v 2532 = is_move_assignable<_Tp>::value; 2533#endif 2534 2535// is_destructible 2536 2537#if __has_keyword(__is_destructible) 2538 2539template<class _Tp> 2540struct _LIBCPP_TEMPLATE_VIS is_destructible : _BoolConstant<__is_destructible(_Tp)> { }; 2541 2542#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2543template <class _Tp> 2544_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_destructible_v = __is_destructible(_Tp); 2545#endif 2546 2547#else // __has_keyword(__is_destructible) 2548 2549// if it's a reference, return true 2550// if it's a function, return false 2551// if it's void, return false 2552// if it's an array of unknown bound, return false 2553// Otherwise, return "declval<_Up&>().~_Up()" is well-formed 2554// where _Up is remove_all_extents<_Tp>::type 2555 2556template <class> 2557struct __is_destructible_apply { typedef int type; }; 2558 2559template <typename _Tp> 2560struct __is_destructor_wellformed { 2561 template <typename _Tp1> 2562 static char __test ( 2563 typename __is_destructible_apply<decltype(_VSTD::declval<_Tp1&>().~_Tp1())>::type 2564 ); 2565 2566 template <typename _Tp1> 2567 static __two __test (...); 2568 2569 static const bool value = sizeof(__test<_Tp>(12)) == sizeof(char); 2570}; 2571 2572template <class _Tp, bool> 2573struct __destructible_imp; 2574 2575template <class _Tp> 2576struct __destructible_imp<_Tp, false> 2577 : public _VSTD::integral_constant<bool, 2578 __is_destructor_wellformed<typename _VSTD::remove_all_extents<_Tp>::type>::value> {}; 2579 2580template <class _Tp> 2581struct __destructible_imp<_Tp, true> 2582 : public _VSTD::true_type {}; 2583 2584template <class _Tp, bool> 2585struct __destructible_false; 2586 2587template <class _Tp> 2588struct __destructible_false<_Tp, false> : public __destructible_imp<_Tp, _VSTD::is_reference<_Tp>::value> {}; 2589 2590template <class _Tp> 2591struct __destructible_false<_Tp, true> : public _VSTD::false_type {}; 2592 2593template <class _Tp> 2594struct is_destructible 2595 : public __destructible_false<_Tp, _VSTD::is_function<_Tp>::value> {}; 2596 2597template <class _Tp> 2598struct is_destructible<_Tp[]> 2599 : public _VSTD::false_type {}; 2600 2601template <> 2602struct is_destructible<void> 2603 : public _VSTD::false_type {}; 2604 2605#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2606template <class _Tp> 2607_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_destructible_v 2608 = is_destructible<_Tp>::value; 2609#endif 2610 2611#endif // __has_keyword(__is_destructible) 2612 2613// move 2614 2615template <class _Tp> 2616inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2617typename remove_reference<_Tp>::type&& 2618move(_Tp&& __t) _NOEXCEPT 2619{ 2620 typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type _Up; 2621 return static_cast<_Up&&>(__t); 2622} 2623 2624template <class _Tp> 2625inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2626_Tp&& 2627forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT 2628{ 2629 return static_cast<_Tp&&>(__t); 2630} 2631 2632template <class _Tp> 2633inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2634_Tp&& 2635forward(typename remove_reference<_Tp>::type&& __t) _NOEXCEPT 2636{ 2637 static_assert(!is_lvalue_reference<_Tp>::value, 2638 "can not forward an rvalue as an lvalue"); 2639 return static_cast<_Tp&&>(__t); 2640} 2641 2642template <class _Tp> 2643inline _LIBCPP_INLINE_VISIBILITY 2644typename decay<_Tp>::type 2645__decay_copy(_Tp&& __t) 2646{ 2647 return _VSTD::forward<_Tp>(__t); 2648} 2649 2650template <class _MP, bool _IsMemberFunctionPtr, bool _IsMemberObjectPtr> 2651struct __member_pointer_traits_imp 2652{ 2653}; 2654 2655template <class _Rp, class _Class, class ..._Param> 2656struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...), true, false> 2657{ 2658 typedef _Class _ClassType; 2659 typedef _Rp _ReturnType; 2660 typedef _Rp (_FnType) (_Param...); 2661}; 2662 2663template <class _Rp, class _Class, class ..._Param> 2664struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...), true, false> 2665{ 2666 typedef _Class _ClassType; 2667 typedef _Rp _ReturnType; 2668 typedef _Rp (_FnType) (_Param..., ...); 2669}; 2670 2671template <class _Rp, class _Class, class ..._Param> 2672struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const, true, false> 2673{ 2674 typedef _Class const _ClassType; 2675 typedef _Rp _ReturnType; 2676 typedef _Rp (_FnType) (_Param...); 2677}; 2678 2679template <class _Rp, class _Class, class ..._Param> 2680struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const, true, false> 2681{ 2682 typedef _Class const _ClassType; 2683 typedef _Rp _ReturnType; 2684 typedef _Rp (_FnType) (_Param..., ...); 2685}; 2686 2687template <class _Rp, class _Class, class ..._Param> 2688struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile, true, false> 2689{ 2690 typedef _Class volatile _ClassType; 2691 typedef _Rp _ReturnType; 2692 typedef _Rp (_FnType) (_Param...); 2693}; 2694 2695template <class _Rp, class _Class, class ..._Param> 2696struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile, true, false> 2697{ 2698 typedef _Class volatile _ClassType; 2699 typedef _Rp _ReturnType; 2700 typedef _Rp (_FnType) (_Param..., ...); 2701}; 2702 2703template <class _Rp, class _Class, class ..._Param> 2704struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile, true, false> 2705{ 2706 typedef _Class const volatile _ClassType; 2707 typedef _Rp _ReturnType; 2708 typedef _Rp (_FnType) (_Param...); 2709}; 2710 2711template <class _Rp, class _Class, class ..._Param> 2712struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile, true, false> 2713{ 2714 typedef _Class const volatile _ClassType; 2715 typedef _Rp _ReturnType; 2716 typedef _Rp (_FnType) (_Param..., ...); 2717}; 2718 2719#if __has_feature(cxx_reference_qualified_functions) || defined(_LIBCPP_COMPILER_GCC) 2720 2721template <class _Rp, class _Class, class ..._Param> 2722struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &, true, false> 2723{ 2724 typedef _Class& _ClassType; 2725 typedef _Rp _ReturnType; 2726 typedef _Rp (_FnType) (_Param...); 2727}; 2728 2729template <class _Rp, class _Class, class ..._Param> 2730struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &, true, false> 2731{ 2732 typedef _Class& _ClassType; 2733 typedef _Rp _ReturnType; 2734 typedef _Rp (_FnType) (_Param..., ...); 2735}; 2736 2737template <class _Rp, class _Class, class ..._Param> 2738struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&, true, false> 2739{ 2740 typedef _Class const& _ClassType; 2741 typedef _Rp _ReturnType; 2742 typedef _Rp (_FnType) (_Param...); 2743}; 2744 2745template <class _Rp, class _Class, class ..._Param> 2746struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&, true, false> 2747{ 2748 typedef _Class const& _ClassType; 2749 typedef _Rp _ReturnType; 2750 typedef _Rp (_FnType) (_Param..., ...); 2751}; 2752 2753template <class _Rp, class _Class, class ..._Param> 2754struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&, true, false> 2755{ 2756 typedef _Class volatile& _ClassType; 2757 typedef _Rp _ReturnType; 2758 typedef _Rp (_FnType) (_Param...); 2759}; 2760 2761template <class _Rp, class _Class, class ..._Param> 2762struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&, true, false> 2763{ 2764 typedef _Class volatile& _ClassType; 2765 typedef _Rp _ReturnType; 2766 typedef _Rp (_FnType) (_Param..., ...); 2767}; 2768 2769template <class _Rp, class _Class, class ..._Param> 2770struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&, true, false> 2771{ 2772 typedef _Class const volatile& _ClassType; 2773 typedef _Rp _ReturnType; 2774 typedef _Rp (_FnType) (_Param...); 2775}; 2776 2777template <class _Rp, class _Class, class ..._Param> 2778struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&, true, false> 2779{ 2780 typedef _Class const volatile& _ClassType; 2781 typedef _Rp _ReturnType; 2782 typedef _Rp (_FnType) (_Param..., ...); 2783}; 2784 2785template <class _Rp, class _Class, class ..._Param> 2786struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &&, true, false> 2787{ 2788 typedef _Class&& _ClassType; 2789 typedef _Rp _ReturnType; 2790 typedef _Rp (_FnType) (_Param...); 2791}; 2792 2793template <class _Rp, class _Class, class ..._Param> 2794struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &&, true, false> 2795{ 2796 typedef _Class&& _ClassType; 2797 typedef _Rp _ReturnType; 2798 typedef _Rp (_FnType) (_Param..., ...); 2799}; 2800 2801template <class _Rp, class _Class, class ..._Param> 2802struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&&, true, false> 2803{ 2804 typedef _Class const&& _ClassType; 2805 typedef _Rp _ReturnType; 2806 typedef _Rp (_FnType) (_Param...); 2807}; 2808 2809template <class _Rp, class _Class, class ..._Param> 2810struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&&, true, false> 2811{ 2812 typedef _Class const&& _ClassType; 2813 typedef _Rp _ReturnType; 2814 typedef _Rp (_FnType) (_Param..., ...); 2815}; 2816 2817template <class _Rp, class _Class, class ..._Param> 2818struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&&, true, false> 2819{ 2820 typedef _Class volatile&& _ClassType; 2821 typedef _Rp _ReturnType; 2822 typedef _Rp (_FnType) (_Param...); 2823}; 2824 2825template <class _Rp, class _Class, class ..._Param> 2826struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&&, true, false> 2827{ 2828 typedef _Class volatile&& _ClassType; 2829 typedef _Rp _ReturnType; 2830 typedef _Rp (_FnType) (_Param..., ...); 2831}; 2832 2833template <class _Rp, class _Class, class ..._Param> 2834struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&&, true, false> 2835{ 2836 typedef _Class const volatile&& _ClassType; 2837 typedef _Rp _ReturnType; 2838 typedef _Rp (_FnType) (_Param...); 2839}; 2840 2841template <class _Rp, class _Class, class ..._Param> 2842struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&&, true, false> 2843{ 2844 typedef _Class const volatile&& _ClassType; 2845 typedef _Rp _ReturnType; 2846 typedef _Rp (_FnType) (_Param..., ...); 2847}; 2848 2849#endif // __has_feature(cxx_reference_qualified_functions) || defined(_LIBCPP_COMPILER_GCC) 2850 2851 2852template <class _Rp, class _Class> 2853struct __member_pointer_traits_imp<_Rp _Class::*, false, true> 2854{ 2855 typedef _Class _ClassType; 2856 typedef _Rp _ReturnType; 2857}; 2858 2859template <class _MP> 2860struct __member_pointer_traits 2861 : public __member_pointer_traits_imp<typename remove_cv<_MP>::type, 2862 is_member_function_pointer<_MP>::value, 2863 is_member_object_pointer<_MP>::value> 2864{ 2865// typedef ... _ClassType; 2866// typedef ... _ReturnType; 2867// typedef ... _FnType; 2868}; 2869 2870 2871template <class _DecayedFp> 2872struct __member_pointer_class_type {}; 2873 2874template <class _Ret, class _ClassType> 2875struct __member_pointer_class_type<_Ret _ClassType::*> { 2876 typedef _ClassType type; 2877}; 2878 2879// template <class T, class... Args> struct is_constructible; 2880 2881#if defined(_LIBCPP_COMPILER_GCC) && _GNUC_VER_NEW >= 10000 2882# define _LIBCPP_GCC_SUPPORTS_IS_CONSTRUCTIBLE 2883#endif 2884 2885#if !defined(_LIBCPP_CXX03_LANG) && !__has_feature(is_constructible) && !defined(_LIBCPP_GCC_SUPPORTS_IS_CONSTRUCTIBLE) 2886 2887template <class _Tp, class... _Args> 2888struct __libcpp_is_constructible; 2889 2890template <class _To, class _From> 2891struct __is_invalid_base_to_derived_cast { 2892 static_assert(is_reference<_To>::value, "Wrong specialization"); 2893 using _RawFrom = __uncvref_t<_From>; 2894 using _RawTo = __uncvref_t<_To>; 2895 static const bool value = _And< 2896 _IsNotSame<_RawFrom, _RawTo>, 2897 is_base_of<_RawFrom, _RawTo>, 2898 _Not<__libcpp_is_constructible<_RawTo, _From>> 2899 >::value; 2900}; 2901 2902template <class _To, class _From> 2903struct __is_invalid_lvalue_to_rvalue_cast : false_type { 2904 static_assert(is_reference<_To>::value, "Wrong specialization"); 2905}; 2906 2907template <class _ToRef, class _FromRef> 2908struct __is_invalid_lvalue_to_rvalue_cast<_ToRef&&, _FromRef&> { 2909 using _RawFrom = __uncvref_t<_FromRef>; 2910 using _RawTo = __uncvref_t<_ToRef>; 2911 static const bool value = _And< 2912 _Not<is_function<_RawTo>>, 2913 _Or< 2914 _IsSame<_RawFrom, _RawTo>, 2915 is_base_of<_RawTo, _RawFrom>> 2916 >::value; 2917}; 2918 2919struct __is_constructible_helper 2920{ 2921 template <class _To> 2922 static void __eat(_To); 2923 2924 // This overload is needed to work around a Clang bug that disallows 2925 // static_cast<T&&>(e) for non-reference-compatible types. 2926 // Example: static_cast<int&&>(declval<double>()); 2927 // NOTE: The static_cast implementation below is required to support 2928 // classes with explicit conversion operators. 2929 template <class _To, class _From, 2930 class = decltype(__eat<_To>(_VSTD::declval<_From>()))> 2931 static true_type __test_cast(int); 2932 2933 template <class _To, class _From, 2934 class = decltype(static_cast<_To>(_VSTD::declval<_From>()))> 2935 static integral_constant<bool, 2936 !__is_invalid_base_to_derived_cast<_To, _From>::value && 2937 !__is_invalid_lvalue_to_rvalue_cast<_To, _From>::value 2938 > __test_cast(long); 2939 2940 template <class, class> 2941 static false_type __test_cast(...); 2942 2943 template <class _Tp, class ..._Args, 2944 class = decltype(_Tp(_VSTD::declval<_Args>()...))> 2945 static true_type __test_nary(int); 2946 template <class _Tp, class...> 2947 static false_type __test_nary(...); 2948 2949 template <class _Tp, class _A0, class = decltype(::new _Tp(_VSTD::declval<_A0>()))> 2950 static is_destructible<_Tp> __test_unary(int); 2951 template <class, class> 2952 static false_type __test_unary(...); 2953}; 2954 2955template <class _Tp, bool = is_void<_Tp>::value> 2956struct __is_default_constructible 2957 : decltype(__is_constructible_helper::__test_nary<_Tp>(0)) 2958{}; 2959 2960template <class _Tp> 2961struct __is_default_constructible<_Tp, true> : false_type {}; 2962 2963template <class _Tp> 2964struct __is_default_constructible<_Tp[], false> : false_type {}; 2965 2966template <class _Tp, size_t _Nx> 2967struct __is_default_constructible<_Tp[_Nx], false> 2968 : __is_default_constructible<typename remove_all_extents<_Tp>::type> {}; 2969 2970template <class _Tp, class... _Args> 2971struct __libcpp_is_constructible 2972{ 2973 static_assert(sizeof...(_Args) > 1, "Wrong specialization"); 2974 typedef decltype(__is_constructible_helper::__test_nary<_Tp, _Args...>(0)) 2975 type; 2976}; 2977 2978template <class _Tp> 2979struct __libcpp_is_constructible<_Tp> : __is_default_constructible<_Tp> {}; 2980 2981template <class _Tp, class _A0> 2982struct __libcpp_is_constructible<_Tp, _A0> 2983 : public decltype(__is_constructible_helper::__test_unary<_Tp, _A0>(0)) 2984{}; 2985 2986template <class _Tp, class _A0> 2987struct __libcpp_is_constructible<_Tp&, _A0> 2988 : public decltype(__is_constructible_helper:: 2989 __test_cast<_Tp&, _A0>(0)) 2990{}; 2991 2992template <class _Tp, class _A0> 2993struct __libcpp_is_constructible<_Tp&&, _A0> 2994 : public decltype(__is_constructible_helper:: 2995 __test_cast<_Tp&&, _A0>(0)) 2996{}; 2997 2998#endif 2999 3000#if __has_feature(is_constructible) || defined(_LIBCPP_GCC_SUPPORTS_IS_CONSTRUCTIBLE) 3001template <class _Tp, class ..._Args> 3002struct _LIBCPP_TEMPLATE_VIS is_constructible 3003 : public integral_constant<bool, __is_constructible(_Tp, _Args...)> 3004 {}; 3005#else 3006template <class _Tp, class... _Args> 3007struct _LIBCPP_TEMPLATE_VIS is_constructible 3008 : public __libcpp_is_constructible<_Tp, _Args...>::type {}; 3009#endif 3010 3011#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3012template <class _Tp, class ..._Args> 3013_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_constructible_v 3014 = is_constructible<_Tp, _Args...>::value; 3015#endif 3016 3017// is_default_constructible 3018 3019template <class _Tp> 3020struct _LIBCPP_TEMPLATE_VIS is_default_constructible 3021 : public is_constructible<_Tp> 3022 {}; 3023 3024#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3025template <class _Tp> 3026_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_default_constructible_v 3027 = is_default_constructible<_Tp>::value; 3028#endif 3029 3030#ifndef _LIBCPP_CXX03_LANG 3031// First of all, we can't implement this check in C++03 mode because the {} 3032// default initialization syntax isn't valid. 3033// Second, we implement the trait in a funny manner with two defaulted template 3034// arguments to workaround Clang's PR43454. 3035template <class _Tp> 3036void __test_implicit_default_constructible(_Tp); 3037 3038template <class _Tp, class = void, bool = is_default_constructible<_Tp>::value> 3039struct __is_implicitly_default_constructible 3040 : false_type 3041{ }; 3042 3043template <class _Tp> 3044struct __is_implicitly_default_constructible<_Tp, decltype(__test_implicit_default_constructible<_Tp const&>({})), true> 3045 : true_type 3046{ }; 3047 3048template <class _Tp> 3049struct __is_implicitly_default_constructible<_Tp, decltype(__test_implicit_default_constructible<_Tp const&>({})), false> 3050 : false_type 3051{ }; 3052#endif // !C++03 3053 3054// is_copy_constructible 3055 3056template <class _Tp> 3057struct _LIBCPP_TEMPLATE_VIS is_copy_constructible 3058 : public is_constructible<_Tp, 3059 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3060 3061#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3062template <class _Tp> 3063_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_constructible_v 3064 = is_copy_constructible<_Tp>::value; 3065#endif 3066 3067// is_move_constructible 3068 3069template <class _Tp> 3070struct _LIBCPP_TEMPLATE_VIS is_move_constructible 3071 : public is_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3072 {}; 3073 3074#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3075template <class _Tp> 3076_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_constructible_v 3077 = is_move_constructible<_Tp>::value; 3078#endif 3079 3080// is_trivially_constructible 3081 3082#if __has_feature(is_trivially_constructible) || _GNUC_VER >= 501 3083 3084template <class _Tp, class... _Args> 3085struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3086 : integral_constant<bool, __is_trivially_constructible(_Tp, _Args...)> 3087{ 3088}; 3089 3090#else // !__has_feature(is_trivially_constructible) 3091 3092template <class _Tp, class... _Args> 3093struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3094 : false_type 3095{ 3096}; 3097 3098template <class _Tp> 3099struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp> 3100#if __has_feature(has_trivial_constructor) || defined(_LIBCPP_COMPILER_GCC) 3101 : integral_constant<bool, __has_trivial_constructor(_Tp)> 3102#else 3103 : integral_constant<bool, is_scalar<_Tp>::value> 3104#endif 3105{ 3106}; 3107 3108template <class _Tp> 3109struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&&> 3110 : integral_constant<bool, is_scalar<_Tp>::value> 3111{ 3112}; 3113 3114template <class _Tp> 3115struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, const _Tp&> 3116 : integral_constant<bool, is_scalar<_Tp>::value> 3117{ 3118}; 3119 3120template <class _Tp> 3121struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&> 3122 : integral_constant<bool, is_scalar<_Tp>::value> 3123{ 3124}; 3125 3126#endif // !__has_feature(is_trivially_constructible) 3127 3128 3129#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3130template <class _Tp, class... _Args> 3131_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_constructible_v 3132 = is_trivially_constructible<_Tp, _Args...>::value; 3133#endif 3134 3135// is_trivially_default_constructible 3136 3137template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_default_constructible 3138 : public is_trivially_constructible<_Tp> 3139 {}; 3140 3141#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3142template <class _Tp> 3143_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_default_constructible_v 3144 = is_trivially_default_constructible<_Tp>::value; 3145#endif 3146 3147// is_trivially_copy_constructible 3148 3149template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copy_constructible 3150 : public is_trivially_constructible<_Tp, typename add_lvalue_reference<const _Tp>::type> 3151 {}; 3152 3153#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3154template <class _Tp> 3155_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copy_constructible_v 3156 = is_trivially_copy_constructible<_Tp>::value; 3157#endif 3158 3159// is_trivially_move_constructible 3160 3161template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_move_constructible 3162 : public is_trivially_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3163 {}; 3164 3165#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3166template <class _Tp> 3167_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_move_constructible_v 3168 = is_trivially_move_constructible<_Tp>::value; 3169#endif 3170 3171// is_trivially_assignable 3172 3173#if __has_feature(is_trivially_assignable) || _GNUC_VER >= 501 3174 3175template <class _Tp, class _Arg> 3176struct is_trivially_assignable 3177 : integral_constant<bool, __is_trivially_assignable(_Tp, _Arg)> 3178{ 3179}; 3180 3181#else // !__has_feature(is_trivially_assignable) 3182 3183template <class _Tp, class _Arg> 3184struct is_trivially_assignable 3185 : public false_type {}; 3186 3187template <class _Tp> 3188struct is_trivially_assignable<_Tp&, _Tp> 3189 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3190 3191template <class _Tp> 3192struct is_trivially_assignable<_Tp&, _Tp&> 3193 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3194 3195template <class _Tp> 3196struct is_trivially_assignable<_Tp&, const _Tp&> 3197 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3198 3199template <class _Tp> 3200struct is_trivially_assignable<_Tp&, _Tp&&> 3201 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3202 3203#endif // !__has_feature(is_trivially_assignable) 3204 3205#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3206template <class _Tp, class _Arg> 3207_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_assignable_v 3208 = is_trivially_assignable<_Tp, _Arg>::value; 3209#endif 3210 3211// is_trivially_copy_assignable 3212 3213template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copy_assignable 3214 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 3215 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3216 3217#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3218template <class _Tp> 3219_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copy_assignable_v 3220 = is_trivially_copy_assignable<_Tp>::value; 3221#endif 3222 3223// is_trivially_move_assignable 3224 3225template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_move_assignable 3226 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 3227 typename add_rvalue_reference<_Tp>::type> 3228 {}; 3229 3230#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3231template <class _Tp> 3232_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_move_assignable_v 3233 = is_trivially_move_assignable<_Tp>::value; 3234#endif 3235 3236// is_trivially_destructible 3237 3238#if __has_keyword(__is_trivially_destructible) 3239 3240template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3241 : public integral_constant<bool, __is_trivially_destructible(_Tp)> {}; 3242 3243#elif __has_feature(has_trivial_destructor) || defined(_LIBCPP_COMPILER_GCC) 3244 3245template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3246 : public integral_constant<bool, is_destructible<_Tp>::value && __has_trivial_destructor(_Tp)> {}; 3247 3248#else 3249 3250template <class _Tp> struct __libcpp_trivial_destructor 3251 : public integral_constant<bool, is_scalar<_Tp>::value || 3252 is_reference<_Tp>::value> {}; 3253 3254template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3255 : public __libcpp_trivial_destructor<typename remove_all_extents<_Tp>::type> {}; 3256 3257template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible<_Tp[]> 3258 : public false_type {}; 3259 3260#endif 3261 3262#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3263template <class _Tp> 3264_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_destructible_v 3265 = is_trivially_destructible<_Tp>::value; 3266#endif 3267 3268// is_nothrow_constructible 3269 3270#if __has_keyword(__is_nothrow_constructible) 3271 3272template <class _Tp, class... _Args> 3273struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3274 : public integral_constant<bool, __is_nothrow_constructible(_Tp, _Args...)> {}; 3275 3276#else 3277 3278template <bool, bool, class _Tp, class... _Args> struct __libcpp_is_nothrow_constructible; 3279 3280template <class _Tp, class... _Args> 3281struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/false, _Tp, _Args...> 3282 : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> 3283{ 3284}; 3285 3286template <class _Tp> 3287void __implicit_conversion_to(_Tp) noexcept { } 3288 3289template <class _Tp, class _Arg> 3290struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/true, _Tp, _Arg> 3291 : public integral_constant<bool, noexcept(_VSTD::__implicit_conversion_to<_Tp>(declval<_Arg>()))> 3292{ 3293}; 3294 3295template <class _Tp, bool _IsReference, class... _Args> 3296struct __libcpp_is_nothrow_constructible</*is constructible*/false, _IsReference, _Tp, _Args...> 3297 : public false_type 3298{ 3299}; 3300 3301template <class _Tp, class... _Args> 3302struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3303 : __libcpp_is_nothrow_constructible<is_constructible<_Tp, _Args...>::value, is_reference<_Tp>::value, _Tp, _Args...> 3304{ 3305}; 3306 3307template <class _Tp, size_t _Ns> 3308struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp[_Ns]> 3309 : __libcpp_is_nothrow_constructible<is_constructible<_Tp>::value, is_reference<_Tp>::value, _Tp> 3310{ 3311}; 3312 3313#endif // _LIBCPP_HAS_NO_NOEXCEPT 3314 3315 3316#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3317template <class _Tp, class ..._Args> 3318_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_constructible_v 3319 = is_nothrow_constructible<_Tp, _Args...>::value; 3320#endif 3321 3322// is_nothrow_default_constructible 3323 3324template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_default_constructible 3325 : public is_nothrow_constructible<_Tp> 3326 {}; 3327 3328#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3329template <class _Tp> 3330_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_default_constructible_v 3331 = is_nothrow_default_constructible<_Tp>::value; 3332#endif 3333 3334// is_nothrow_copy_constructible 3335 3336template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_constructible 3337 : public is_nothrow_constructible<_Tp, 3338 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3339 3340#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3341template <class _Tp> 3342_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_copy_constructible_v 3343 = is_nothrow_copy_constructible<_Tp>::value; 3344#endif 3345 3346// is_nothrow_move_constructible 3347 3348template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_constructible 3349 : public is_nothrow_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3350 {}; 3351 3352#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3353template <class _Tp> 3354_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_move_constructible_v 3355 = is_nothrow_move_constructible<_Tp>::value; 3356#endif 3357 3358// is_nothrow_assignable 3359 3360#if __has_keyword(__is_nothrow_assignable) 3361 3362template <class _Tp, class _Arg> 3363struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable 3364 : public integral_constant<bool, __is_nothrow_assignable(_Tp, _Arg)> {}; 3365 3366#else 3367 3368template <bool, class _Tp, class _Arg> struct __libcpp_is_nothrow_assignable; 3369 3370template <class _Tp, class _Arg> 3371struct __libcpp_is_nothrow_assignable<false, _Tp, _Arg> 3372 : public false_type 3373{ 3374}; 3375 3376template <class _Tp, class _Arg> 3377struct __libcpp_is_nothrow_assignable<true, _Tp, _Arg> 3378 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>()) > 3379{ 3380}; 3381 3382template <class _Tp, class _Arg> 3383struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable 3384 : public __libcpp_is_nothrow_assignable<is_assignable<_Tp, _Arg>::value, _Tp, _Arg> 3385{ 3386}; 3387 3388#endif // _LIBCPP_HAS_NO_NOEXCEPT 3389 3390#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3391template <class _Tp, class _Arg> 3392_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_assignable_v 3393 = is_nothrow_assignable<_Tp, _Arg>::value; 3394#endif 3395 3396// is_nothrow_copy_assignable 3397 3398template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_assignable 3399 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 3400 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3401 3402#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3403template <class _Tp> 3404_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_copy_assignable_v 3405 = is_nothrow_copy_assignable<_Tp>::value; 3406#endif 3407 3408// is_nothrow_move_assignable 3409 3410template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_assignable 3411 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 3412 typename add_rvalue_reference<_Tp>::type> 3413 {}; 3414 3415#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3416template <class _Tp> 3417_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_move_assignable_v 3418 = is_nothrow_move_assignable<_Tp>::value; 3419#endif 3420 3421// is_nothrow_destructible 3422 3423#if !defined(_LIBCPP_CXX03_LANG) 3424 3425template <bool, class _Tp> struct __libcpp_is_nothrow_destructible; 3426 3427template <class _Tp> 3428struct __libcpp_is_nothrow_destructible<false, _Tp> 3429 : public false_type 3430{ 3431}; 3432 3433template <class _Tp> 3434struct __libcpp_is_nothrow_destructible<true, _Tp> 3435 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>().~_Tp()) > 3436{ 3437}; 3438 3439template <class _Tp> 3440struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 3441 : public __libcpp_is_nothrow_destructible<is_destructible<_Tp>::value, _Tp> 3442{ 3443}; 3444 3445template <class _Tp, size_t _Ns> 3446struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[_Ns]> 3447 : public is_nothrow_destructible<_Tp> 3448{ 3449}; 3450 3451template <class _Tp> 3452struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&> 3453 : public true_type 3454{ 3455}; 3456 3457template <class _Tp> 3458struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&&> 3459 : public true_type 3460{ 3461}; 3462 3463#else 3464 3465template <class _Tp> struct __libcpp_nothrow_destructor 3466 : public integral_constant<bool, is_scalar<_Tp>::value || 3467 is_reference<_Tp>::value> {}; 3468 3469template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 3470 : public __libcpp_nothrow_destructor<typename remove_all_extents<_Tp>::type> {}; 3471 3472template <class _Tp> 3473struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[]> 3474 : public false_type {}; 3475 3476#endif 3477 3478#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3479template <class _Tp> 3480_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_destructible_v 3481 = is_nothrow_destructible<_Tp>::value; 3482#endif 3483 3484// is_pod 3485 3486#if __has_feature(is_pod) || defined(_LIBCPP_COMPILER_GCC) 3487 3488template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod 3489 : public integral_constant<bool, __is_pod(_Tp)> {}; 3490 3491#else 3492 3493template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod 3494 : public integral_constant<bool, is_trivially_default_constructible<_Tp>::value && 3495 is_trivially_copy_constructible<_Tp>::value && 3496 is_trivially_copy_assignable<_Tp>::value && 3497 is_trivially_destructible<_Tp>::value> {}; 3498 3499#endif 3500 3501#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3502template <class _Tp> 3503_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pod_v 3504 = is_pod<_Tp>::value; 3505#endif 3506 3507// is_literal_type; 3508 3509template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_literal_type 3510 : public integral_constant<bool, __is_literal_type(_Tp)> 3511 {}; 3512 3513#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3514template <class _Tp> 3515_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_literal_type_v 3516 = is_literal_type<_Tp>::value; 3517#endif 3518 3519// is_standard_layout; 3520 3521template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_standard_layout 3522#if __has_feature(is_standard_layout) || defined(_LIBCPP_COMPILER_GCC) 3523 : public integral_constant<bool, __is_standard_layout(_Tp)> 3524#else 3525 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 3526#endif 3527 {}; 3528 3529#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3530template <class _Tp> 3531_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_standard_layout_v 3532 = is_standard_layout<_Tp>::value; 3533#endif 3534 3535// is_trivially_copyable; 3536 3537template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copyable 3538#if __has_feature(is_trivially_copyable) 3539 : public integral_constant<bool, __is_trivially_copyable(_Tp)> 3540#elif _GNUC_VER >= 501 3541 : public integral_constant<bool, !is_volatile<_Tp>::value && __is_trivially_copyable(_Tp)> 3542#else 3543 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 3544#endif 3545 {}; 3546 3547#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3548template <class _Tp> 3549_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copyable_v 3550 = is_trivially_copyable<_Tp>::value; 3551#endif 3552 3553// is_trivial; 3554 3555template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivial 3556#if __has_feature(is_trivial) || defined(_LIBCPP_COMPILER_GCC) 3557 : public integral_constant<bool, __is_trivial(_Tp)> 3558#else 3559 : integral_constant<bool, is_trivially_copyable<_Tp>::value && 3560 is_trivially_default_constructible<_Tp>::value> 3561#endif 3562 {}; 3563 3564#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3565template <class _Tp> 3566_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivial_v 3567 = is_trivial<_Tp>::value; 3568#endif 3569 3570template <class _Tp> struct __is_reference_wrapper_impl : public false_type {}; 3571template <class _Tp> struct __is_reference_wrapper_impl<reference_wrapper<_Tp> > : public true_type {}; 3572template <class _Tp> struct __is_reference_wrapper 3573 : public __is_reference_wrapper_impl<typename remove_cv<_Tp>::type> {}; 3574 3575#ifndef _LIBCPP_CXX03_LANG 3576 3577template <class _Fp, class _A0, 3578 class _DecayFp = typename decay<_Fp>::type, 3579 class _DecayA0 = typename decay<_A0>::type, 3580 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3581using __enable_if_bullet1 = typename enable_if 3582 < 3583 is_member_function_pointer<_DecayFp>::value 3584 && is_base_of<_ClassT, _DecayA0>::value 3585 >::type; 3586 3587template <class _Fp, class _A0, 3588 class _DecayFp = typename decay<_Fp>::type, 3589 class _DecayA0 = typename decay<_A0>::type> 3590using __enable_if_bullet2 = typename enable_if 3591 < 3592 is_member_function_pointer<_DecayFp>::value 3593 && __is_reference_wrapper<_DecayA0>::value 3594 >::type; 3595 3596template <class _Fp, class _A0, 3597 class _DecayFp = typename decay<_Fp>::type, 3598 class _DecayA0 = typename decay<_A0>::type, 3599 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3600using __enable_if_bullet3 = typename enable_if 3601 < 3602 is_member_function_pointer<_DecayFp>::value 3603 && !is_base_of<_ClassT, _DecayA0>::value 3604 && !__is_reference_wrapper<_DecayA0>::value 3605 >::type; 3606 3607template <class _Fp, class _A0, 3608 class _DecayFp = typename decay<_Fp>::type, 3609 class _DecayA0 = typename decay<_A0>::type, 3610 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3611using __enable_if_bullet4 = typename enable_if 3612 < 3613 is_member_object_pointer<_DecayFp>::value 3614 && is_base_of<_ClassT, _DecayA0>::value 3615 >::type; 3616 3617template <class _Fp, class _A0, 3618 class _DecayFp = typename decay<_Fp>::type, 3619 class _DecayA0 = typename decay<_A0>::type> 3620using __enable_if_bullet5 = typename enable_if 3621 < 3622 is_member_object_pointer<_DecayFp>::value 3623 && __is_reference_wrapper<_DecayA0>::value 3624 >::type; 3625 3626template <class _Fp, class _A0, 3627 class _DecayFp = typename decay<_Fp>::type, 3628 class _DecayA0 = typename decay<_A0>::type, 3629 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3630using __enable_if_bullet6 = typename enable_if 3631 < 3632 is_member_object_pointer<_DecayFp>::value 3633 && !is_base_of<_ClassT, _DecayA0>::value 3634 && !__is_reference_wrapper<_DecayA0>::value 3635 >::type; 3636 3637// __invoke forward declarations 3638 3639// fall back - none of the bullets 3640 3641#define _LIBCPP_INVOKE_RETURN(...) \ 3642 noexcept(noexcept(__VA_ARGS__)) -> decltype(__VA_ARGS__) \ 3643 { return __VA_ARGS__; } 3644 3645template <class ..._Args> 3646auto __invoke(__any, _Args&& ...__args) -> __nat; 3647 3648template <class ..._Args> 3649auto __invoke_constexpr(__any, _Args&& ...__args) -> __nat; 3650 3651// bullets 1, 2 and 3 3652 3653template <class _Fp, class _A0, class ..._Args, 3654 class = __enable_if_bullet1<_Fp, _A0>> 3655inline _LIBCPP_INLINE_VISIBILITY 3656auto 3657__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3658_LIBCPP_INVOKE_RETURN((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) 3659 3660template <class _Fp, class _A0, class ..._Args, 3661 class = __enable_if_bullet1<_Fp, _A0>> 3662inline _LIBCPP_INLINE_VISIBILITY 3663_LIBCPP_CONSTEXPR auto 3664__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3665_LIBCPP_INVOKE_RETURN((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) 3666 3667template <class _Fp, class _A0, class ..._Args, 3668 class = __enable_if_bullet2<_Fp, _A0>> 3669inline _LIBCPP_INLINE_VISIBILITY 3670auto 3671__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3672_LIBCPP_INVOKE_RETURN((__a0.get().*__f)(_VSTD::forward<_Args>(__args)...)) 3673 3674template <class _Fp, class _A0, class ..._Args, 3675 class = __enable_if_bullet2<_Fp, _A0>> 3676inline _LIBCPP_INLINE_VISIBILITY 3677_LIBCPP_CONSTEXPR auto 3678__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3679_LIBCPP_INVOKE_RETURN((__a0.get().*__f)(_VSTD::forward<_Args>(__args)...)) 3680 3681template <class _Fp, class _A0, class ..._Args, 3682 class = __enable_if_bullet3<_Fp, _A0>> 3683inline _LIBCPP_INLINE_VISIBILITY 3684auto 3685__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3686_LIBCPP_INVOKE_RETURN(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) 3687 3688template <class _Fp, class _A0, class ..._Args, 3689 class = __enable_if_bullet3<_Fp, _A0>> 3690inline _LIBCPP_INLINE_VISIBILITY 3691_LIBCPP_CONSTEXPR auto 3692__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3693_LIBCPP_INVOKE_RETURN(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) 3694 3695// bullets 4, 5 and 6 3696 3697template <class _Fp, class _A0, 3698 class = __enable_if_bullet4<_Fp, _A0>> 3699inline _LIBCPP_INLINE_VISIBILITY 3700auto 3701__invoke(_Fp&& __f, _A0&& __a0) 3702_LIBCPP_INVOKE_RETURN(_VSTD::forward<_A0>(__a0).*__f) 3703 3704template <class _Fp, class _A0, 3705 class = __enable_if_bullet4<_Fp, _A0>> 3706inline _LIBCPP_INLINE_VISIBILITY 3707_LIBCPP_CONSTEXPR auto 3708__invoke_constexpr(_Fp&& __f, _A0&& __a0) 3709_LIBCPP_INVOKE_RETURN(_VSTD::forward<_A0>(__a0).*__f) 3710 3711template <class _Fp, class _A0, 3712 class = __enable_if_bullet5<_Fp, _A0>> 3713inline _LIBCPP_INLINE_VISIBILITY 3714auto 3715__invoke(_Fp&& __f, _A0&& __a0) 3716_LIBCPP_INVOKE_RETURN(__a0.get().*__f) 3717 3718template <class _Fp, class _A0, 3719 class = __enable_if_bullet5<_Fp, _A0>> 3720inline _LIBCPP_INLINE_VISIBILITY 3721_LIBCPP_CONSTEXPR auto 3722__invoke_constexpr(_Fp&& __f, _A0&& __a0) 3723_LIBCPP_INVOKE_RETURN(__a0.get().*__f) 3724 3725template <class _Fp, class _A0, 3726 class = __enable_if_bullet6<_Fp, _A0>> 3727inline _LIBCPP_INLINE_VISIBILITY 3728auto 3729__invoke(_Fp&& __f, _A0&& __a0) 3730_LIBCPP_INVOKE_RETURN((*_VSTD::forward<_A0>(__a0)).*__f) 3731 3732template <class _Fp, class _A0, 3733 class = __enable_if_bullet6<_Fp, _A0>> 3734inline _LIBCPP_INLINE_VISIBILITY 3735_LIBCPP_CONSTEXPR auto 3736__invoke_constexpr(_Fp&& __f, _A0&& __a0) 3737_LIBCPP_INVOKE_RETURN((*_VSTD::forward<_A0>(__a0)).*__f) 3738 3739// bullet 7 3740 3741template <class _Fp, class ..._Args> 3742inline _LIBCPP_INLINE_VISIBILITY 3743auto 3744__invoke(_Fp&& __f, _Args&& ...__args) 3745_LIBCPP_INVOKE_RETURN(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) 3746 3747template <class _Fp, class ..._Args> 3748inline _LIBCPP_INLINE_VISIBILITY 3749_LIBCPP_CONSTEXPR auto 3750__invoke_constexpr(_Fp&& __f, _Args&& ...__args) 3751_LIBCPP_INVOKE_RETURN(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) 3752 3753#undef _LIBCPP_INVOKE_RETURN 3754 3755// __invokable 3756template <class _Ret, class _Fp, class ..._Args> 3757struct __invokable_r 3758{ 3759 template <class _XFp, class ..._XArgs> 3760 static auto __try_call(int) -> decltype( 3761 _VSTD::__invoke(_VSTD::declval<_XFp>(), _VSTD::declval<_XArgs>()...)); 3762 template <class _XFp, class ..._XArgs> 3763 static __nat __try_call(...); 3764 3765 // FIXME: Check that _Ret, _Fp, and _Args... are all complete types, cv void, 3766 // or incomplete array types as required by the standard. 3767 using _Result = decltype(__try_call<_Fp, _Args...>(0)); 3768 3769 using type = 3770 typename conditional< 3771 _IsNotSame<_Result, __nat>::value, 3772 typename conditional< 3773 is_void<_Ret>::value, 3774 true_type, 3775 is_convertible<_Result, _Ret> 3776 >::type, 3777 false_type 3778 >::type; 3779 static const bool value = type::value; 3780}; 3781template <class _Fp, class ..._Args> 3782using __invokable = __invokable_r<void, _Fp, _Args...>; 3783 3784template <bool _IsInvokable, bool _IsCVVoid, class _Ret, class _Fp, class ..._Args> 3785struct __nothrow_invokable_r_imp { 3786 static const bool value = false; 3787}; 3788 3789template <class _Ret, class _Fp, class ..._Args> 3790struct __nothrow_invokable_r_imp<true, false, _Ret, _Fp, _Args...> 3791{ 3792 typedef __nothrow_invokable_r_imp _ThisT; 3793 3794 template <class _Tp> 3795 static void __test_noexcept(_Tp) noexcept; 3796 3797 static const bool value = noexcept(_ThisT::__test_noexcept<_Ret>( 3798 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...))); 3799}; 3800 3801template <class _Ret, class _Fp, class ..._Args> 3802struct __nothrow_invokable_r_imp<true, true, _Ret, _Fp, _Args...> 3803{ 3804 static const bool value = noexcept( 3805 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...)); 3806}; 3807 3808template <class _Ret, class _Fp, class ..._Args> 3809using __nothrow_invokable_r = 3810 __nothrow_invokable_r_imp< 3811 __invokable_r<_Ret, _Fp, _Args...>::value, 3812 is_void<_Ret>::value, 3813 _Ret, _Fp, _Args... 3814 >; 3815 3816template <class _Fp, class ..._Args> 3817using __nothrow_invokable = 3818 __nothrow_invokable_r_imp< 3819 __invokable<_Fp, _Args...>::value, 3820 true, void, _Fp, _Args... 3821 >; 3822 3823template <class _Fp, class ..._Args> 3824struct __invoke_of 3825 : public enable_if< 3826 __invokable<_Fp, _Args...>::value, 3827 typename __invokable_r<void, _Fp, _Args...>::_Result> 3828{ 3829}; 3830 3831#endif // _LIBCPP_CXX03_LANG 3832 3833// result_of 3834 3835template <class _Callable> class result_of; 3836 3837#ifndef _LIBCPP_CXX03_LANG 3838 3839template <class _Fp, class ..._Args> 3840class _LIBCPP_TEMPLATE_VIS result_of<_Fp(_Args...)> 3841 : public __invoke_of<_Fp, _Args...> 3842{ 3843}; 3844 3845#else // C++03 3846 3847template <class _Fn, bool, bool> 3848class __result_of 3849{ 3850}; 3851 3852template <class _Fn, class ..._Args> 3853class __result_of<_Fn(_Args...), true, false> 3854{ 3855public: 3856 typedef decltype(declval<_Fn>()(declval<_Args>()...)) type; 3857}; 3858 3859template <class _MP, class _Tp, bool _IsMemberFunctionPtr> 3860struct __result_of_mp; 3861 3862// member function pointer 3863 3864template <class _MP, class _Tp> 3865struct __result_of_mp<_MP, _Tp, true> 3866 : public __identity<typename __member_pointer_traits<_MP>::_ReturnType> 3867{ 3868}; 3869 3870// member data pointer 3871 3872template <class _MP, class _Tp, bool> 3873struct __result_of_mdp; 3874 3875template <class _Rp, class _Class, class _Tp> 3876struct __result_of_mdp<_Rp _Class::*, _Tp, false> 3877{ 3878 typedef typename __apply_cv<decltype(*_VSTD::declval<_Tp>()), _Rp>::type& type; 3879}; 3880 3881template <class _Rp, class _Class, class _Tp> 3882struct __result_of_mdp<_Rp _Class::*, _Tp, true> 3883{ 3884 typedef typename __apply_cv<_Tp, _Rp>::type& type; 3885}; 3886 3887template <class _Rp, class _Class, class _Tp> 3888struct __result_of_mp<_Rp _Class::*, _Tp, false> 3889 : public __result_of_mdp<_Rp _Class::*, _Tp, 3890 is_base_of<_Class, typename remove_reference<_Tp>::type>::value> 3891{ 3892}; 3893 3894template <class _Fn, class _Tp> 3895class __result_of<_Fn(_Tp), false, true> // _Fn must be member pointer 3896 : public __result_of_mp<typename remove_reference<_Fn>::type, 3897 _Tp, 3898 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 3899{ 3900}; 3901 3902template <class _Fn, class _Tp, class ..._Args> 3903class __result_of<_Fn(_Tp, _Args...), false, true> // _Fn must be member pointer 3904 : public __result_of_mp<typename remove_reference<_Fn>::type, 3905 _Tp, 3906 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 3907{ 3908}; 3909 3910template <class _Fn, class ..._Args> 3911class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_Args...)> 3912 : public __result_of<_Fn(_Args...), 3913 is_class<typename remove_reference<_Fn>::type>::value || 3914 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 3915 is_member_pointer<typename remove_reference<_Fn>::type>::value 3916 > 3917{ 3918}; 3919 3920#endif // C++03 3921 3922#if _LIBCPP_STD_VER > 11 3923template <class _Tp> using result_of_t = typename result_of<_Tp>::type; 3924#endif 3925 3926#if _LIBCPP_STD_VER > 14 3927 3928// invoke_result 3929 3930template <class _Fn, class... _Args> 3931struct _LIBCPP_TEMPLATE_VIS invoke_result 3932 : __invoke_of<_Fn, _Args...> 3933{ 3934}; 3935 3936template <class _Fn, class... _Args> 3937using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; 3938 3939// is_invocable 3940 3941template <class _Fn, class ..._Args> 3942struct _LIBCPP_TEMPLATE_VIS is_invocable 3943 : integral_constant<bool, __invokable<_Fn, _Args...>::value> {}; 3944 3945template <class _Ret, class _Fn, class ..._Args> 3946struct _LIBCPP_TEMPLATE_VIS is_invocable_r 3947 : integral_constant<bool, __invokable_r<_Ret, _Fn, _Args...>::value> {}; 3948 3949template <class _Fn, class ..._Args> 3950_LIBCPP_INLINE_VAR constexpr bool is_invocable_v 3951 = is_invocable<_Fn, _Args...>::value; 3952 3953template <class _Ret, class _Fn, class ..._Args> 3954_LIBCPP_INLINE_VAR constexpr bool is_invocable_r_v 3955 = is_invocable_r<_Ret, _Fn, _Args...>::value; 3956 3957// is_nothrow_invocable 3958 3959template <class _Fn, class ..._Args> 3960struct _LIBCPP_TEMPLATE_VIS is_nothrow_invocable 3961 : integral_constant<bool, __nothrow_invokable<_Fn, _Args...>::value> {}; 3962 3963template <class _Ret, class _Fn, class ..._Args> 3964struct _LIBCPP_TEMPLATE_VIS is_nothrow_invocable_r 3965 : integral_constant<bool, __nothrow_invokable_r<_Ret, _Fn, _Args...>::value> {}; 3966 3967template <class _Fn, class ..._Args> 3968_LIBCPP_INLINE_VAR constexpr bool is_nothrow_invocable_v 3969 = is_nothrow_invocable<_Fn, _Args...>::value; 3970 3971template <class _Ret, class _Fn, class ..._Args> 3972_LIBCPP_INLINE_VAR constexpr bool is_nothrow_invocable_r_v 3973 = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value; 3974 3975#endif // _LIBCPP_STD_VER > 14 3976 3977template <class _Tp> struct __is_swappable; 3978template <class _Tp> struct __is_nothrow_swappable; 3979 3980// swap, swap_ranges 3981 3982template <class _ForwardIterator1, class _ForwardIterator2> 3983inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 3984_ForwardIterator2 3985swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2); 3986 3987template <class _Tp> 3988inline _LIBCPP_INLINE_VISIBILITY 3989#ifndef _LIBCPP_CXX03_LANG 3990typename enable_if 3991< 3992 is_move_constructible<_Tp>::value && 3993 is_move_assignable<_Tp>::value 3994>::type 3995#else 3996void 3997#endif 3998_LIBCPP_CONSTEXPR_AFTER_CXX17 3999swap(_Tp& __x, _Tp& __y) _NOEXCEPT_(is_nothrow_move_constructible<_Tp>::value && 4000 is_nothrow_move_assignable<_Tp>::value) 4001{ 4002 _Tp __t(_VSTD::move(__x)); 4003 __x = _VSTD::move(__y); 4004 __y = _VSTD::move(__t); 4005} 4006 4007template<class _Tp, size_t _Np> 4008inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4009typename enable_if< 4010 __is_swappable<_Tp>::value 4011>::type 4012swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np]) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value) 4013{ 4014 _VSTD::swap_ranges(__a, __a + _Np, __b); 4015} 4016 4017template <class _ForwardIterator1, class _ForwardIterator2> 4018inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4019_ForwardIterator2 4020swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) 4021{ 4022 for(; __first1 != __last1; ++__first1, (void) ++__first2) 4023 swap(*__first1, *__first2); 4024 return __first2; 4025} 4026 4027// iter_swap 4028 4029template <class _ForwardIterator1, class _ForwardIterator2> 4030inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4031void 4032iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) 4033 // _NOEXCEPT_(_NOEXCEPT_(swap(*__a, *__b))) 4034 _NOEXCEPT_(_NOEXCEPT_(swap(*_VSTD::declval<_ForwardIterator1>(), 4035 *_VSTD::declval<_ForwardIterator2>()))) 4036{ 4037 swap(*__a, *__b); 4038} 4039 4040// __swappable 4041 4042namespace __detail 4043{ 4044// ALL generic swap overloads MUST already have a declaration available at this point. 4045 4046template <class _Tp, class _Up = _Tp, 4047 bool _NotVoid = !is_void<_Tp>::value && !is_void<_Up>::value> 4048struct __swappable_with 4049{ 4050 template <class _LHS, class _RHS> 4051 static decltype(swap(_VSTD::declval<_LHS>(), _VSTD::declval<_RHS>())) 4052 __test_swap(int); 4053 template <class, class> 4054 static __nat __test_swap(long); 4055 4056 // Extra parens are needed for the C++03 definition of decltype. 4057 typedef decltype((__test_swap<_Tp, _Up>(0))) __swap1; 4058 typedef decltype((__test_swap<_Up, _Tp>(0))) __swap2; 4059 4060 static const bool value = _IsNotSame<__swap1, __nat>::value 4061 && _IsNotSame<__swap2, __nat>::value; 4062}; 4063 4064template <class _Tp, class _Up> 4065struct __swappable_with<_Tp, _Up, false> : false_type {}; 4066 4067template <class _Tp, class _Up = _Tp, bool _Swappable = __swappable_with<_Tp, _Up>::value> 4068struct __nothrow_swappable_with { 4069 static const bool value = 4070#ifndef _LIBCPP_HAS_NO_NOEXCEPT 4071 noexcept(swap(_VSTD::declval<_Tp>(), _VSTD::declval<_Up>())) 4072 && noexcept(swap(_VSTD::declval<_Up>(), _VSTD::declval<_Tp>())); 4073#else 4074 false; 4075#endif 4076}; 4077 4078template <class _Tp, class _Up> 4079struct __nothrow_swappable_with<_Tp, _Up, false> : false_type {}; 4080 4081} // __detail 4082 4083template <class _Tp> 4084struct __is_swappable 4085 : public integral_constant<bool, __detail::__swappable_with<_Tp&>::value> 4086{ 4087}; 4088 4089template <class _Tp> 4090struct __is_nothrow_swappable 4091 : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp&>::value> 4092{ 4093}; 4094 4095#if _LIBCPP_STD_VER > 14 4096 4097template <class _Tp, class _Up> 4098struct _LIBCPP_TEMPLATE_VIS is_swappable_with 4099 : public integral_constant<bool, __detail::__swappable_with<_Tp, _Up>::value> 4100{ 4101}; 4102 4103template <class _Tp> 4104struct _LIBCPP_TEMPLATE_VIS is_swappable 4105 : public conditional< 4106 __is_referenceable<_Tp>::value, 4107 is_swappable_with< 4108 typename add_lvalue_reference<_Tp>::type, 4109 typename add_lvalue_reference<_Tp>::type>, 4110 false_type 4111 >::type 4112{ 4113}; 4114 4115template <class _Tp, class _Up> 4116struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable_with 4117 : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp, _Up>::value> 4118{ 4119}; 4120 4121template <class _Tp> 4122struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable 4123 : public conditional< 4124 __is_referenceable<_Tp>::value, 4125 is_nothrow_swappable_with< 4126 typename add_lvalue_reference<_Tp>::type, 4127 typename add_lvalue_reference<_Tp>::type>, 4128 false_type 4129 >::type 4130{ 4131}; 4132 4133template <class _Tp, class _Up> 4134_LIBCPP_INLINE_VAR constexpr bool is_swappable_with_v 4135 = is_swappable_with<_Tp, _Up>::value; 4136 4137template <class _Tp> 4138_LIBCPP_INLINE_VAR constexpr bool is_swappable_v 4139 = is_swappable<_Tp>::value; 4140 4141template <class _Tp, class _Up> 4142_LIBCPP_INLINE_VAR constexpr bool is_nothrow_swappable_with_v 4143 = is_nothrow_swappable_with<_Tp, _Up>::value; 4144 4145template <class _Tp> 4146_LIBCPP_INLINE_VAR constexpr bool is_nothrow_swappable_v 4147 = is_nothrow_swappable<_Tp>::value; 4148 4149#endif // _LIBCPP_STD_VER > 14 4150 4151template <class _Tp, bool = is_enum<_Tp>::value> struct __underlying_type_impl; 4152 4153template <class _Tp> 4154struct __underlying_type_impl<_Tp, false> {}; 4155 4156template <class _Tp> 4157struct __underlying_type_impl<_Tp, true> 4158{ 4159 typedef __underlying_type(_Tp) type; 4160}; 4161 4162template <class _Tp> 4163struct underlying_type : __underlying_type_impl<_Tp, is_enum<_Tp>::value> {}; 4164 4165#if _LIBCPP_STD_VER > 11 4166template <class _Tp> using underlying_type_t = typename underlying_type<_Tp>::type; 4167#endif 4168 4169template <class _Tp, bool = is_enum<_Tp>::value> 4170struct __sfinae_underlying_type 4171{ 4172 typedef typename underlying_type<_Tp>::type type; 4173 typedef decltype(((type)1) + 0) __promoted_type; 4174}; 4175 4176template <class _Tp> 4177struct __sfinae_underlying_type<_Tp, false> {}; 4178 4179inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4180int __convert_to_integral(int __val) { return __val; } 4181 4182inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4183unsigned __convert_to_integral(unsigned __val) { return __val; } 4184 4185inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4186long __convert_to_integral(long __val) { return __val; } 4187 4188inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4189unsigned long __convert_to_integral(unsigned long __val) { return __val; } 4190 4191inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4192long long __convert_to_integral(long long __val) { return __val; } 4193 4194inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4195unsigned long long __convert_to_integral(unsigned long long __val) {return __val; } 4196 4197template<typename _Fp> 4198inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4199typename enable_if<is_floating_point<_Fp>::value, long long>::type 4200 __convert_to_integral(_Fp __val) { return __val; } 4201 4202#ifndef _LIBCPP_HAS_NO_INT128 4203inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4204__int128_t __convert_to_integral(__int128_t __val) { return __val; } 4205 4206inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4207__uint128_t __convert_to_integral(__uint128_t __val) { return __val; } 4208#endif 4209 4210template <class _Tp> 4211inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4212typename __sfinae_underlying_type<_Tp>::__promoted_type 4213__convert_to_integral(_Tp __val) { return __val; } 4214 4215#ifndef _LIBCPP_CXX03_LANG 4216 4217template <class _Tp> 4218struct __has_operator_addressof_member_imp 4219{ 4220 template <class _Up> 4221 static auto __test(int) 4222 -> typename __select_2nd<decltype(_VSTD::declval<_Up>().operator&()), true_type>::type; 4223 template <class> 4224 static auto __test(long) -> false_type; 4225 4226 static const bool value = decltype(__test<_Tp>(0))::value; 4227}; 4228 4229template <class _Tp> 4230struct __has_operator_addressof_free_imp 4231{ 4232 template <class _Up> 4233 static auto __test(int) 4234 -> typename __select_2nd<decltype(operator&(_VSTD::declval<_Up>())), true_type>::type; 4235 template <class> 4236 static auto __test(long) -> false_type; 4237 4238 static const bool value = decltype(__test<_Tp>(0))::value; 4239}; 4240 4241template <class _Tp> 4242struct __has_operator_addressof 4243 : public integral_constant<bool, __has_operator_addressof_member_imp<_Tp>::value 4244 || __has_operator_addressof_free_imp<_Tp>::value> 4245{}; 4246 4247#endif // _LIBCPP_CXX03_LANG 4248 4249#if _LIBCPP_STD_VER > 14 4250 4251template <class... _Args> 4252struct conjunction : _And<_Args...> {}; 4253template<class... _Args> 4254_LIBCPP_INLINE_VAR constexpr bool conjunction_v 4255 = conjunction<_Args...>::value; 4256 4257template <class... _Args> 4258struct disjunction : _Or<_Args...> {}; 4259template<class... _Args> 4260_LIBCPP_INLINE_VAR constexpr bool disjunction_v 4261 = disjunction<_Args...>::value; 4262 4263template <class _Tp> 4264struct negation : _Not<_Tp> {}; 4265template<class _Tp> 4266_LIBCPP_INLINE_VAR constexpr bool negation_v 4267 = negation<_Tp>::value; 4268#endif // _LIBCPP_STD_VER > 14 4269 4270// These traits are used in __tree and __hash_table 4271struct __extract_key_fail_tag {}; 4272struct __extract_key_self_tag {}; 4273struct __extract_key_first_tag {}; 4274 4275template <class _ValTy, class _Key, 4276 class _RawValTy = typename __unconstref<_ValTy>::type> 4277struct __can_extract_key 4278 : conditional<_IsSame<_RawValTy, _Key>::value, __extract_key_self_tag, 4279 __extract_key_fail_tag>::type {}; 4280 4281template <class _Pair, class _Key, class _First, class _Second> 4282struct __can_extract_key<_Pair, _Key, pair<_First, _Second> > 4283 : conditional<_IsSame<typename remove_const<_First>::type, _Key>::value, 4284 __extract_key_first_tag, __extract_key_fail_tag>::type {}; 4285 4286// __can_extract_map_key uses true_type/false_type instead of the tags. 4287// It returns true if _Key != _ContainerValueTy (the container is a map not a set) 4288// and _ValTy == _Key. 4289template <class _ValTy, class _Key, class _ContainerValueTy, 4290 class _RawValTy = typename __unconstref<_ValTy>::type> 4291struct __can_extract_map_key 4292 : integral_constant<bool, _IsSame<_RawValTy, _Key>::value> {}; 4293 4294// This specialization returns __extract_key_fail_tag for non-map containers 4295// because _Key == _ContainerValueTy 4296template <class _ValTy, class _Key, class _RawValTy> 4297struct __can_extract_map_key<_ValTy, _Key, _Key, _RawValTy> 4298 : false_type {}; 4299 4300#ifndef _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED 4301#if _LIBCPP_STD_VER > 17 4302_LIBCPP_INLINE_VISIBILITY 4303inline constexpr bool is_constant_evaluated() noexcept { 4304 return __builtin_is_constant_evaluated(); 4305} 4306#endif 4307 4308inline _LIBCPP_CONSTEXPR 4309bool __libcpp_is_constant_evaluated() _NOEXCEPT { return __builtin_is_constant_evaluated(); } 4310#else 4311inline _LIBCPP_CONSTEXPR 4312bool __libcpp_is_constant_evaluated() _NOEXCEPT { return false; } 4313#endif 4314 4315template <class _CharT> 4316using _IsCharLikeType = _And<is_standard_layout<_CharT>, is_trivial<_CharT> >; 4317 4318_LIBCPP_END_NAMESPACE_STD 4319 4320#if _LIBCPP_STD_VER > 14 4321// std::byte 4322namespace std // purposefully not versioned 4323{ 4324 4325 4326} 4327#endif 4328 4329#endif // _LIBCPP_TYPE_TRAITS 4330