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(std::__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(__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 2351template <class _Tp, class _Up, class = void> 2352struct __common_type2_imp {}; 2353 2354template <class _Tp, class _Up> 2355struct __common_type2_imp<_Tp, _Up, 2356 typename __void_t<decltype( 2357 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2358 )>::type> 2359{ 2360 typedef _LIBCPP_NODEBUG_TYPE typename decay<decltype( 2361 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2362 )>::type type; 2363}; 2364 2365template <class, class = void> 2366struct __common_type_impl {}; 2367 2368// Clang provides variadic templates in C++03 as an extension. 2369#if !defined(_LIBCPP_CXX03_LANG) || defined(__clang__) 2370# define _LIBCPP_OPTIONAL_PACK(...) , __VA_ARGS__ 2371template <class... Tp> 2372struct __common_types; 2373template <class... _Tp> 2374struct _LIBCPP_TEMPLATE_VIS common_type; 2375#else 2376# define _LIBCPP_OPTIONAL_PACK(...) 2377struct __no_arg; 2378template <class _Tp, class _Up, class = __no_arg> 2379struct __common_types; 2380template <class _Tp = __no_arg, class _Up = __no_arg, class _Vp = __no_arg, 2381 class _Unused = __no_arg> 2382struct common_type { 2383 static_assert(sizeof(_Unused) == 0, 2384 "common_type accepts at most 3 arguments in C++03"); 2385}; 2386#endif // _LIBCPP_CXX03_LANG 2387 2388template <class _Tp, class _Up> 2389struct __common_type_impl< 2390 __common_types<_Tp, _Up>, 2391 typename __void_t<typename common_type<_Tp, _Up>::type>::type> 2392{ 2393 typedef typename common_type<_Tp, _Up>::type type; 2394}; 2395 2396template <class _Tp, class _Up, class _Vp _LIBCPP_OPTIONAL_PACK(class... _Rest)> 2397struct __common_type_impl< 2398 __common_types<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)>, 2399 typename __void_t<typename common_type<_Tp, _Up>::type>::type> 2400 : __common_type_impl<__common_types<typename common_type<_Tp, _Up>::type, 2401 _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> > { 2402}; 2403 2404// bullet 1 - sizeof...(Tp) == 0 2405 2406template <> 2407struct _LIBCPP_TEMPLATE_VIS common_type<> {}; 2408 2409// bullet 2 - sizeof...(Tp) == 1 2410 2411template <class _Tp> 2412struct _LIBCPP_TEMPLATE_VIS common_type<_Tp> 2413 : public common_type<_Tp, _Tp> {}; 2414 2415// bullet 3 - sizeof...(Tp) == 2 2416 2417template <class _Tp, class _Up> 2418struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, _Up> 2419 : conditional< 2420 _IsSame<_Tp, typename decay<_Tp>::type>::value && _IsSame<_Up, typename decay<_Up>::type>::value, 2421 __common_type2_imp<_Tp, _Up>, 2422 common_type<typename decay<_Tp>::type, typename decay<_Up>::type> 2423 >::type 2424{}; 2425 2426// bullet 4 - sizeof...(Tp) > 2 2427 2428template <class _Tp, class _Up, class _Vp _LIBCPP_OPTIONAL_PACK(class... _Rest)> 2429struct _LIBCPP_TEMPLATE_VIS 2430 common_type<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> 2431 : __common_type_impl< 2432 __common_types<_Tp, _Up, _Vp _LIBCPP_OPTIONAL_PACK(_Rest...)> > {}; 2433 2434#undef _LIBCPP_OPTIONAL_PACK 2435 2436#if _LIBCPP_STD_VER > 11 2437template <class ..._Tp> using common_type_t = typename common_type<_Tp...>::type; 2438#endif 2439 2440// is_assignable 2441 2442template<typename, typename _Tp> struct __select_2nd { typedef _LIBCPP_NODEBUG_TYPE _Tp type; }; 2443 2444#if __has_keyword(__is_assignable) 2445 2446template<class _Tp, class _Up> 2447struct _LIBCPP_TEMPLATE_VIS is_assignable : _BoolConstant<__is_assignable(_Tp, _Up)> { }; 2448 2449#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2450template <class _Tp, class _Arg> 2451_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_assignable_v = __is_assignable(_Tp, _Arg); 2452#endif 2453 2454#else // __has_keyword(__is_assignable) 2455 2456template <class _Tp, class _Arg> 2457typename __select_2nd<decltype((_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>())), true_type>::type 2458__is_assignable_test(int); 2459 2460template <class, class> 2461false_type __is_assignable_test(...); 2462 2463 2464template <class _Tp, class _Arg, bool = is_void<_Tp>::value || is_void<_Arg>::value> 2465struct __is_assignable_imp 2466 : public decltype((_VSTD::__is_assignable_test<_Tp, _Arg>(0))) {}; 2467 2468template <class _Tp, class _Arg> 2469struct __is_assignable_imp<_Tp, _Arg, true> 2470 : public false_type 2471{ 2472}; 2473 2474template <class _Tp, class _Arg> 2475struct is_assignable 2476 : public __is_assignable_imp<_Tp, _Arg> {}; 2477 2478#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2479template <class _Tp, class _Arg> 2480_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_assignable_v 2481 = is_assignable<_Tp, _Arg>::value; 2482#endif 2483 2484#endif // __has_keyword(__is_assignable) 2485 2486// is_copy_assignable 2487 2488template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_copy_assignable 2489 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 2490 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 2491 2492#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2493template <class _Tp> 2494_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_assignable_v 2495 = is_copy_assignable<_Tp>::value; 2496#endif 2497 2498// is_move_assignable 2499 2500template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_move_assignable 2501 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 2502 typename add_rvalue_reference<_Tp>::type> {}; 2503 2504#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2505template <class _Tp> 2506_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_assignable_v 2507 = is_move_assignable<_Tp>::value; 2508#endif 2509 2510// is_destructible 2511 2512#if __has_keyword(__is_destructible) 2513 2514template<class _Tp> 2515struct _LIBCPP_TEMPLATE_VIS is_destructible : _BoolConstant<__is_destructible(_Tp)> { }; 2516 2517#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2518template <class _Tp> 2519_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_destructible_v = __is_destructible(_Tp); 2520#endif 2521 2522#else // __has_keyword(__is_destructible) 2523 2524// if it's a reference, return true 2525// if it's a function, return false 2526// if it's void, return false 2527// if it's an array of unknown bound, return false 2528// Otherwise, return "std::declval<_Up&>().~_Up()" is well-formed 2529// where _Up is remove_all_extents<_Tp>::type 2530 2531template <class> 2532struct __is_destructible_apply { typedef int type; }; 2533 2534template <typename _Tp> 2535struct __is_destructor_wellformed { 2536 template <typename _Tp1> 2537 static char __test ( 2538 typename __is_destructible_apply<decltype(_VSTD::declval<_Tp1&>().~_Tp1())>::type 2539 ); 2540 2541 template <typename _Tp1> 2542 static __two __test (...); 2543 2544 static const bool value = sizeof(__test<_Tp>(12)) == sizeof(char); 2545}; 2546 2547template <class _Tp, bool> 2548struct __destructible_imp; 2549 2550template <class _Tp> 2551struct __destructible_imp<_Tp, false> 2552 : public _VSTD::integral_constant<bool, 2553 __is_destructor_wellformed<typename _VSTD::remove_all_extents<_Tp>::type>::value> {}; 2554 2555template <class _Tp> 2556struct __destructible_imp<_Tp, true> 2557 : public _VSTD::true_type {}; 2558 2559template <class _Tp, bool> 2560struct __destructible_false; 2561 2562template <class _Tp> 2563struct __destructible_false<_Tp, false> : public __destructible_imp<_Tp, _VSTD::is_reference<_Tp>::value> {}; 2564 2565template <class _Tp> 2566struct __destructible_false<_Tp, true> : public _VSTD::false_type {}; 2567 2568template <class _Tp> 2569struct is_destructible 2570 : public __destructible_false<_Tp, _VSTD::is_function<_Tp>::value> {}; 2571 2572template <class _Tp> 2573struct is_destructible<_Tp[]> 2574 : public _VSTD::false_type {}; 2575 2576template <> 2577struct is_destructible<void> 2578 : public _VSTD::false_type {}; 2579 2580#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2581template <class _Tp> 2582_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_destructible_v 2583 = is_destructible<_Tp>::value; 2584#endif 2585 2586#endif // __has_keyword(__is_destructible) 2587 2588// move 2589 2590template <class _Tp> 2591inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2592typename remove_reference<_Tp>::type&& 2593move(_Tp&& __t) _NOEXCEPT 2594{ 2595 typedef _LIBCPP_NODEBUG_TYPE typename remove_reference<_Tp>::type _Up; 2596 return static_cast<_Up&&>(__t); 2597} 2598 2599template <class _Tp> 2600inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2601_Tp&& 2602forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT 2603{ 2604 return static_cast<_Tp&&>(__t); 2605} 2606 2607template <class _Tp> 2608inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2609_Tp&& 2610forward(typename remove_reference<_Tp>::type&& __t) _NOEXCEPT 2611{ 2612 static_assert(!is_lvalue_reference<_Tp>::value, 2613 "can not forward an rvalue as an lvalue"); 2614 return static_cast<_Tp&&>(__t); 2615} 2616 2617template <class _Tp> 2618inline _LIBCPP_INLINE_VISIBILITY 2619typename decay<_Tp>::type 2620__decay_copy(_Tp&& __t) 2621{ 2622 return _VSTD::forward<_Tp>(__t); 2623} 2624 2625template <class _MP, bool _IsMemberFunctionPtr, bool _IsMemberObjectPtr> 2626struct __member_pointer_traits_imp 2627{ 2628}; 2629 2630template <class _Rp, class _Class, class ..._Param> 2631struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...), true, false> 2632{ 2633 typedef _Class _ClassType; 2634 typedef _Rp _ReturnType; 2635 typedef _Rp (_FnType) (_Param...); 2636}; 2637 2638template <class _Rp, class _Class, class ..._Param> 2639struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...), true, false> 2640{ 2641 typedef _Class _ClassType; 2642 typedef _Rp _ReturnType; 2643 typedef _Rp (_FnType) (_Param..., ...); 2644}; 2645 2646template <class _Rp, class _Class, class ..._Param> 2647struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const, true, false> 2648{ 2649 typedef _Class const _ClassType; 2650 typedef _Rp _ReturnType; 2651 typedef _Rp (_FnType) (_Param...); 2652}; 2653 2654template <class _Rp, class _Class, class ..._Param> 2655struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const, true, false> 2656{ 2657 typedef _Class const _ClassType; 2658 typedef _Rp _ReturnType; 2659 typedef _Rp (_FnType) (_Param..., ...); 2660}; 2661 2662template <class _Rp, class _Class, class ..._Param> 2663struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile, true, false> 2664{ 2665 typedef _Class volatile _ClassType; 2666 typedef _Rp _ReturnType; 2667 typedef _Rp (_FnType) (_Param...); 2668}; 2669 2670template <class _Rp, class _Class, class ..._Param> 2671struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile, true, false> 2672{ 2673 typedef _Class volatile _ClassType; 2674 typedef _Rp _ReturnType; 2675 typedef _Rp (_FnType) (_Param..., ...); 2676}; 2677 2678template <class _Rp, class _Class, class ..._Param> 2679struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile, true, false> 2680{ 2681 typedef _Class const volatile _ClassType; 2682 typedef _Rp _ReturnType; 2683 typedef _Rp (_FnType) (_Param...); 2684}; 2685 2686template <class _Rp, class _Class, class ..._Param> 2687struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile, true, false> 2688{ 2689 typedef _Class const volatile _ClassType; 2690 typedef _Rp _ReturnType; 2691 typedef _Rp (_FnType) (_Param..., ...); 2692}; 2693 2694#if __has_feature(cxx_reference_qualified_functions) || defined(_LIBCPP_COMPILER_GCC) 2695 2696template <class _Rp, class _Class, class ..._Param> 2697struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &, true, false> 2698{ 2699 typedef _Class& _ClassType; 2700 typedef _Rp _ReturnType; 2701 typedef _Rp (_FnType) (_Param...); 2702}; 2703 2704template <class _Rp, class _Class, class ..._Param> 2705struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &, true, false> 2706{ 2707 typedef _Class& _ClassType; 2708 typedef _Rp _ReturnType; 2709 typedef _Rp (_FnType) (_Param..., ...); 2710}; 2711 2712template <class _Rp, class _Class, class ..._Param> 2713struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&, true, false> 2714{ 2715 typedef _Class const& _ClassType; 2716 typedef _Rp _ReturnType; 2717 typedef _Rp (_FnType) (_Param...); 2718}; 2719 2720template <class _Rp, class _Class, class ..._Param> 2721struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&, true, false> 2722{ 2723 typedef _Class const& _ClassType; 2724 typedef _Rp _ReturnType; 2725 typedef _Rp (_FnType) (_Param..., ...); 2726}; 2727 2728template <class _Rp, class _Class, class ..._Param> 2729struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&, true, false> 2730{ 2731 typedef _Class volatile& _ClassType; 2732 typedef _Rp _ReturnType; 2733 typedef _Rp (_FnType) (_Param...); 2734}; 2735 2736template <class _Rp, class _Class, class ..._Param> 2737struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&, true, false> 2738{ 2739 typedef _Class volatile& _ClassType; 2740 typedef _Rp _ReturnType; 2741 typedef _Rp (_FnType) (_Param..., ...); 2742}; 2743 2744template <class _Rp, class _Class, class ..._Param> 2745struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&, true, false> 2746{ 2747 typedef _Class const volatile& _ClassType; 2748 typedef _Rp _ReturnType; 2749 typedef _Rp (_FnType) (_Param...); 2750}; 2751 2752template <class _Rp, class _Class, class ..._Param> 2753struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&, true, false> 2754{ 2755 typedef _Class const volatile& _ClassType; 2756 typedef _Rp _ReturnType; 2757 typedef _Rp (_FnType) (_Param..., ...); 2758}; 2759 2760template <class _Rp, class _Class, class ..._Param> 2761struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &&, true, false> 2762{ 2763 typedef _Class&& _ClassType; 2764 typedef _Rp _ReturnType; 2765 typedef _Rp (_FnType) (_Param...); 2766}; 2767 2768template <class _Rp, class _Class, class ..._Param> 2769struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &&, true, false> 2770{ 2771 typedef _Class&& _ClassType; 2772 typedef _Rp _ReturnType; 2773 typedef _Rp (_FnType) (_Param..., ...); 2774}; 2775 2776template <class _Rp, class _Class, class ..._Param> 2777struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&&, true, false> 2778{ 2779 typedef _Class const&& _ClassType; 2780 typedef _Rp _ReturnType; 2781 typedef _Rp (_FnType) (_Param...); 2782}; 2783 2784template <class _Rp, class _Class, class ..._Param> 2785struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&&, true, false> 2786{ 2787 typedef _Class const&& _ClassType; 2788 typedef _Rp _ReturnType; 2789 typedef _Rp (_FnType) (_Param..., ...); 2790}; 2791 2792template <class _Rp, class _Class, class ..._Param> 2793struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&&, true, false> 2794{ 2795 typedef _Class volatile&& _ClassType; 2796 typedef _Rp _ReturnType; 2797 typedef _Rp (_FnType) (_Param...); 2798}; 2799 2800template <class _Rp, class _Class, class ..._Param> 2801struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&&, true, false> 2802{ 2803 typedef _Class volatile&& _ClassType; 2804 typedef _Rp _ReturnType; 2805 typedef _Rp (_FnType) (_Param..., ...); 2806}; 2807 2808template <class _Rp, class _Class, class ..._Param> 2809struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&&, true, false> 2810{ 2811 typedef _Class const volatile&& _ClassType; 2812 typedef _Rp _ReturnType; 2813 typedef _Rp (_FnType) (_Param...); 2814}; 2815 2816template <class _Rp, class _Class, class ..._Param> 2817struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&&, true, false> 2818{ 2819 typedef _Class const volatile&& _ClassType; 2820 typedef _Rp _ReturnType; 2821 typedef _Rp (_FnType) (_Param..., ...); 2822}; 2823 2824#endif // __has_feature(cxx_reference_qualified_functions) || defined(_LIBCPP_COMPILER_GCC) 2825 2826 2827template <class _Rp, class _Class> 2828struct __member_pointer_traits_imp<_Rp _Class::*, false, true> 2829{ 2830 typedef _Class _ClassType; 2831 typedef _Rp _ReturnType; 2832}; 2833 2834template <class _MP> 2835struct __member_pointer_traits 2836 : public __member_pointer_traits_imp<typename remove_cv<_MP>::type, 2837 is_member_function_pointer<_MP>::value, 2838 is_member_object_pointer<_MP>::value> 2839{ 2840// typedef ... _ClassType; 2841// typedef ... _ReturnType; 2842// typedef ... _FnType; 2843}; 2844 2845 2846template <class _DecayedFp> 2847struct __member_pointer_class_type {}; 2848 2849template <class _Ret, class _ClassType> 2850struct __member_pointer_class_type<_Ret _ClassType::*> { 2851 typedef _ClassType type; 2852}; 2853 2854// result_of 2855 2856template <class _Callable> class result_of; 2857 2858#ifdef _LIBCPP_HAS_NO_VARIADICS 2859 2860template <class _Fn, bool, bool> 2861class __result_of 2862{ 2863}; 2864 2865template <class _Fn> 2866class __result_of<_Fn(), true, false> 2867{ 2868public: 2869 typedef decltype(declval<_Fn>()()) type; 2870}; 2871 2872template <class _Fn, class _A0> 2873class __result_of<_Fn(_A0), true, false> 2874{ 2875public: 2876 typedef decltype(declval<_Fn>()(declval<_A0>())) type; 2877}; 2878 2879template <class _Fn, class _A0, class _A1> 2880class __result_of<_Fn(_A0, _A1), true, false> 2881{ 2882public: 2883 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>())) type; 2884}; 2885 2886template <class _Fn, class _A0, class _A1, class _A2> 2887class __result_of<_Fn(_A0, _A1, _A2), true, false> 2888{ 2889public: 2890 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>(), declval<_A2>())) type; 2891}; 2892 2893template <class _MP, class _Tp, bool _IsMemberFunctionPtr> 2894struct __result_of_mp; 2895 2896// member function pointer 2897 2898template <class _MP, class _Tp> 2899struct __result_of_mp<_MP, _Tp, true> 2900 : public __identity<typename __member_pointer_traits<_MP>::_ReturnType> 2901{ 2902}; 2903 2904// member data pointer 2905 2906template <class _MP, class _Tp, bool> 2907struct __result_of_mdp; 2908 2909template <class _Rp, class _Class, class _Tp> 2910struct __result_of_mdp<_Rp _Class::*, _Tp, false> 2911{ 2912 typedef typename __apply_cv<decltype(*_VSTD::declval<_Tp>()), _Rp>::type& type; 2913}; 2914 2915template <class _Rp, class _Class, class _Tp> 2916struct __result_of_mdp<_Rp _Class::*, _Tp, true> 2917{ 2918 typedef typename __apply_cv<_Tp, _Rp>::type& type; 2919}; 2920 2921template <class _Rp, class _Class, class _Tp> 2922struct __result_of_mp<_Rp _Class::*, _Tp, false> 2923 : public __result_of_mdp<_Rp _Class::*, _Tp, 2924 is_base_of<_Class, typename remove_reference<_Tp>::type>::value> 2925{ 2926}; 2927 2928 2929 2930template <class _Fn, class _Tp> 2931class __result_of<_Fn(_Tp), false, true> // _Fn must be member pointer 2932 : public __result_of_mp<typename remove_reference<_Fn>::type, 2933 _Tp, 2934 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2935{ 2936}; 2937 2938template <class _Fn, class _Tp, class _A0> 2939class __result_of<_Fn(_Tp, _A0), false, true> // _Fn must be member pointer 2940 : public __result_of_mp<typename remove_reference<_Fn>::type, 2941 _Tp, 2942 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2943{ 2944}; 2945 2946template <class _Fn, class _Tp, class _A0, class _A1> 2947class __result_of<_Fn(_Tp, _A0, _A1), false, true> // _Fn must be member pointer 2948 : public __result_of_mp<typename remove_reference<_Fn>::type, 2949 _Tp, 2950 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2951{ 2952}; 2953 2954template <class _Fn, class _Tp, class _A0, class _A1, class _A2> 2955class __result_of<_Fn(_Tp, _A0, _A1, _A2), false, true> // _Fn must be member pointer 2956 : public __result_of_mp<typename remove_reference<_Fn>::type, 2957 _Tp, 2958 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2959{ 2960}; 2961 2962// result_of 2963 2964template <class _Fn> 2965class _LIBCPP_TEMPLATE_VIS result_of<_Fn()> 2966 : public __result_of<_Fn(), 2967 is_class<typename remove_reference<_Fn>::type>::value || 2968 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 2969 is_member_pointer<typename remove_reference<_Fn>::type>::value 2970 > 2971{ 2972}; 2973 2974template <class _Fn, class _A0> 2975class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0)> 2976 : public __result_of<_Fn(_A0), 2977 is_class<typename remove_reference<_Fn>::type>::value || 2978 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 2979 is_member_pointer<typename remove_reference<_Fn>::type>::value 2980 > 2981{ 2982}; 2983 2984template <class _Fn, class _A0, class _A1> 2985class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0, _A1)> 2986 : public __result_of<_Fn(_A0, _A1), 2987 is_class<typename remove_reference<_Fn>::type>::value || 2988 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 2989 is_member_pointer<typename remove_reference<_Fn>::type>::value 2990 > 2991{ 2992}; 2993 2994template <class _Fn, class _A0, class _A1, class _A2> 2995class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0, _A1, _A2)> 2996 : public __result_of<_Fn(_A0, _A1, _A2), 2997 is_class<typename remove_reference<_Fn>::type>::value || 2998 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 2999 is_member_pointer<typename remove_reference<_Fn>::type>::value 3000 > 3001{ 3002}; 3003 3004#endif // _LIBCPP_HAS_NO_VARIADICS 3005 3006// template <class T, class... Args> struct is_constructible; 3007 3008namespace __is_construct 3009{ 3010struct __nat {}; 3011} 3012 3013#if !defined(_LIBCPP_CXX03_LANG) && (!__has_feature(is_constructible) || \ 3014 defined(_LIBCPP_TESTING_FALLBACK_IS_CONSTRUCTIBLE)) 3015 3016template <class _Tp, class... _Args> 3017struct __libcpp_is_constructible; 3018 3019template <class _To, class _From> 3020struct __is_invalid_base_to_derived_cast { 3021 static_assert(is_reference<_To>::value, "Wrong specialization"); 3022 using _RawFrom = __uncvref_t<_From>; 3023 using _RawTo = __uncvref_t<_To>; 3024 static const bool value = _And< 3025 _IsNotSame<_RawFrom, _RawTo>, 3026 is_base_of<_RawFrom, _RawTo>, 3027 _Not<__libcpp_is_constructible<_RawTo, _From>> 3028 >::value; 3029}; 3030 3031template <class _To, class _From> 3032struct __is_invalid_lvalue_to_rvalue_cast : false_type { 3033 static_assert(is_reference<_To>::value, "Wrong specialization"); 3034}; 3035 3036template <class _ToRef, class _FromRef> 3037struct __is_invalid_lvalue_to_rvalue_cast<_ToRef&&, _FromRef&> { 3038 using _RawFrom = __uncvref_t<_FromRef>; 3039 using _RawTo = __uncvref_t<_ToRef>; 3040 static const bool value = _And< 3041 _Not<is_function<_RawTo>>, 3042 _Or< 3043 _IsSame<_RawFrom, _RawTo>, 3044 is_base_of<_RawTo, _RawFrom>> 3045 >::value; 3046}; 3047 3048struct __is_constructible_helper 3049{ 3050 template <class _To> 3051 static void __eat(_To); 3052 3053 // This overload is needed to work around a Clang bug that disallows 3054 // static_cast<T&&>(e) for non-reference-compatible types. 3055 // Example: static_cast<int&&>(declval<double>()); 3056 // NOTE: The static_cast implementation below is required to support 3057 // classes with explicit conversion operators. 3058 template <class _To, class _From, 3059 class = decltype(__eat<_To>(_VSTD::declval<_From>()))> 3060 static true_type __test_cast(int); 3061 3062 template <class _To, class _From, 3063 class = decltype(static_cast<_To>(_VSTD::declval<_From>()))> 3064 static integral_constant<bool, 3065 !__is_invalid_base_to_derived_cast<_To, _From>::value && 3066 !__is_invalid_lvalue_to_rvalue_cast<_To, _From>::value 3067 > __test_cast(long); 3068 3069 template <class, class> 3070 static false_type __test_cast(...); 3071 3072 template <class _Tp, class ..._Args, 3073 class = decltype(_Tp(_VSTD::declval<_Args>()...))> 3074 static true_type __test_nary(int); 3075 template <class _Tp, class...> 3076 static false_type __test_nary(...); 3077 3078 template <class _Tp, class _A0, class = decltype(::new _Tp(_VSTD::declval<_A0>()))> 3079 static is_destructible<_Tp> __test_unary(int); 3080 template <class, class> 3081 static false_type __test_unary(...); 3082}; 3083 3084template <class _Tp, bool = is_void<_Tp>::value> 3085struct __is_default_constructible 3086 : decltype(__is_constructible_helper::__test_nary<_Tp>(0)) 3087{}; 3088 3089template <class _Tp> 3090struct __is_default_constructible<_Tp, true> : false_type {}; 3091 3092template <class _Tp> 3093struct __is_default_constructible<_Tp[], false> : false_type {}; 3094 3095template <class _Tp, size_t _Nx> 3096struct __is_default_constructible<_Tp[_Nx], false> 3097 : __is_default_constructible<typename remove_all_extents<_Tp>::type> {}; 3098 3099template <class _Tp, class... _Args> 3100struct __libcpp_is_constructible 3101{ 3102 static_assert(sizeof...(_Args) > 1, "Wrong specialization"); 3103 typedef decltype(__is_constructible_helper::__test_nary<_Tp, _Args...>(0)) 3104 type; 3105}; 3106 3107template <class _Tp> 3108struct __libcpp_is_constructible<_Tp> : __is_default_constructible<_Tp> {}; 3109 3110template <class _Tp, class _A0> 3111struct __libcpp_is_constructible<_Tp, _A0> 3112 : public decltype(__is_constructible_helper::__test_unary<_Tp, _A0>(0)) 3113{}; 3114 3115template <class _Tp, class _A0> 3116struct __libcpp_is_constructible<_Tp&, _A0> 3117 : public decltype(__is_constructible_helper:: 3118 __test_cast<_Tp&, _A0>(0)) 3119{}; 3120 3121template <class _Tp, class _A0> 3122struct __libcpp_is_constructible<_Tp&&, _A0> 3123 : public decltype(__is_constructible_helper:: 3124 __test_cast<_Tp&&, _A0>(0)) 3125{}; 3126 3127#endif 3128 3129#if __has_feature(is_constructible) 3130template <class _Tp, class ..._Args> 3131struct _LIBCPP_TEMPLATE_VIS is_constructible 3132 : public integral_constant<bool, __is_constructible(_Tp, _Args...)> 3133 {}; 3134#else 3135template <class _Tp, class... _Args> 3136struct _LIBCPP_TEMPLATE_VIS is_constructible 3137 : public __libcpp_is_constructible<_Tp, _Args...>::type {}; 3138#endif 3139 3140#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3141template <class _Tp, class ..._Args> 3142_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_constructible_v 3143 = is_constructible<_Tp, _Args...>::value; 3144#endif 3145 3146// is_default_constructible 3147 3148template <class _Tp> 3149struct _LIBCPP_TEMPLATE_VIS is_default_constructible 3150 : public is_constructible<_Tp> 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_default_constructible_v 3156 = is_default_constructible<_Tp>::value; 3157#endif 3158 3159#ifndef _LIBCPP_CXX03_LANG 3160// First of all, we can't implement this check in C++03 mode because the {} 3161// default initialization syntax isn't valid. 3162// Second, we implement the trait in a funny manner with two defaulted template 3163// arguments to workaround Clang's PR43454. 3164template <class _Tp> 3165void __test_implicit_default_constructible(_Tp); 3166 3167template <class _Tp, class = void, bool = is_default_constructible<_Tp>::value> 3168struct __is_implicitly_default_constructible 3169 : false_type 3170{ }; 3171 3172template <class _Tp> 3173struct __is_implicitly_default_constructible<_Tp, decltype(__test_implicit_default_constructible<_Tp const&>({})), true> 3174 : true_type 3175{ }; 3176 3177template <class _Tp> 3178struct __is_implicitly_default_constructible<_Tp, decltype(__test_implicit_default_constructible<_Tp const&>({})), false> 3179 : false_type 3180{ }; 3181#endif // !C++03 3182 3183// is_copy_constructible 3184 3185template <class _Tp> 3186struct _LIBCPP_TEMPLATE_VIS is_copy_constructible 3187 : public is_constructible<_Tp, 3188 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3189 3190#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3191template <class _Tp> 3192_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_constructible_v 3193 = is_copy_constructible<_Tp>::value; 3194#endif 3195 3196// is_move_constructible 3197 3198template <class _Tp> 3199struct _LIBCPP_TEMPLATE_VIS is_move_constructible 3200 : public is_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3201 {}; 3202 3203#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3204template <class _Tp> 3205_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_constructible_v 3206 = is_move_constructible<_Tp>::value; 3207#endif 3208 3209// is_trivially_constructible 3210 3211#if __has_feature(is_trivially_constructible) || _GNUC_VER >= 501 3212 3213template <class _Tp, class... _Args> 3214struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3215 : integral_constant<bool, __is_trivially_constructible(_Tp, _Args...)> 3216{ 3217}; 3218 3219#else // !__has_feature(is_trivially_constructible) 3220 3221template <class _Tp, class... _Args> 3222struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3223 : false_type 3224{ 3225}; 3226 3227template <class _Tp> 3228struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp> 3229#if __has_feature(has_trivial_constructor) || defined(_LIBCPP_COMPILER_GCC) 3230 : integral_constant<bool, __has_trivial_constructor(_Tp)> 3231#else 3232 : integral_constant<bool, is_scalar<_Tp>::value> 3233#endif 3234{ 3235}; 3236 3237template <class _Tp> 3238struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&&> 3239 : integral_constant<bool, is_scalar<_Tp>::value> 3240{ 3241}; 3242 3243template <class _Tp> 3244struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, const _Tp&> 3245 : integral_constant<bool, is_scalar<_Tp>::value> 3246{ 3247}; 3248 3249template <class _Tp> 3250struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&> 3251 : integral_constant<bool, is_scalar<_Tp>::value> 3252{ 3253}; 3254 3255#endif // !__has_feature(is_trivially_constructible) 3256 3257 3258#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3259template <class _Tp, class... _Args> 3260_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_constructible_v 3261 = is_trivially_constructible<_Tp, _Args...>::value; 3262#endif 3263 3264// is_trivially_default_constructible 3265 3266template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_default_constructible 3267 : public is_trivially_constructible<_Tp> 3268 {}; 3269 3270#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3271template <class _Tp> 3272_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_default_constructible_v 3273 = is_trivially_default_constructible<_Tp>::value; 3274#endif 3275 3276// is_trivially_copy_constructible 3277 3278template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copy_constructible 3279 : public is_trivially_constructible<_Tp, typename add_lvalue_reference<const _Tp>::type> 3280 {}; 3281 3282#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3283template <class _Tp> 3284_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copy_constructible_v 3285 = is_trivially_copy_constructible<_Tp>::value; 3286#endif 3287 3288// is_trivially_move_constructible 3289 3290template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_move_constructible 3291 : public is_trivially_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3292 {}; 3293 3294#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3295template <class _Tp> 3296_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_move_constructible_v 3297 = is_trivially_move_constructible<_Tp>::value; 3298#endif 3299 3300// is_trivially_assignable 3301 3302#if __has_feature(is_trivially_assignable) || _GNUC_VER >= 501 3303 3304template <class _Tp, class _Arg> 3305struct is_trivially_assignable 3306 : integral_constant<bool, __is_trivially_assignable(_Tp, _Arg)> 3307{ 3308}; 3309 3310#else // !__has_feature(is_trivially_assignable) 3311 3312template <class _Tp, class _Arg> 3313struct is_trivially_assignable 3314 : public false_type {}; 3315 3316template <class _Tp> 3317struct is_trivially_assignable<_Tp&, _Tp> 3318 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3319 3320template <class _Tp> 3321struct is_trivially_assignable<_Tp&, _Tp&> 3322 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3323 3324template <class _Tp> 3325struct is_trivially_assignable<_Tp&, const _Tp&> 3326 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3327 3328template <class _Tp> 3329struct is_trivially_assignable<_Tp&, _Tp&&> 3330 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3331 3332#endif // !__has_feature(is_trivially_assignable) 3333 3334#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3335template <class _Tp, class _Arg> 3336_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_assignable_v 3337 = is_trivially_assignable<_Tp, _Arg>::value; 3338#endif 3339 3340// is_trivially_copy_assignable 3341 3342template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copy_assignable 3343 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 3344 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3345 3346#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3347template <class _Tp> 3348_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copy_assignable_v 3349 = is_trivially_copy_assignable<_Tp>::value; 3350#endif 3351 3352// is_trivially_move_assignable 3353 3354template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_move_assignable 3355 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 3356 typename add_rvalue_reference<_Tp>::type> 3357 {}; 3358 3359#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3360template <class _Tp> 3361_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_move_assignable_v 3362 = is_trivially_move_assignable<_Tp>::value; 3363#endif 3364 3365// is_trivially_destructible 3366 3367#if __has_keyword(__is_trivially_destructible) 3368 3369template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3370 : public integral_constant<bool, __is_trivially_destructible(_Tp)> {}; 3371 3372#elif __has_feature(has_trivial_destructor) || defined(_LIBCPP_COMPILER_GCC) 3373 3374template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3375 : public integral_constant<bool, is_destructible<_Tp>::value && __has_trivial_destructor(_Tp)> {}; 3376 3377#else 3378 3379template <class _Tp> struct __libcpp_trivial_destructor 3380 : public integral_constant<bool, is_scalar<_Tp>::value || 3381 is_reference<_Tp>::value> {}; 3382 3383template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3384 : public __libcpp_trivial_destructor<typename remove_all_extents<_Tp>::type> {}; 3385 3386template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible<_Tp[]> 3387 : public false_type {}; 3388 3389#endif 3390 3391#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3392template <class _Tp> 3393_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_destructible_v 3394 = is_trivially_destructible<_Tp>::value; 3395#endif 3396 3397// is_nothrow_constructible 3398 3399#if __has_keyword(__is_nothrow_constructible) 3400 3401template <class _Tp, class... _Args> 3402struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3403 : public integral_constant<bool, __is_nothrow_constructible(_Tp, _Args...)> {}; 3404 3405#else 3406 3407template <bool, bool, class _Tp, class... _Args> struct __libcpp_is_nothrow_constructible; 3408 3409template <class _Tp, class... _Args> 3410struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/false, _Tp, _Args...> 3411 : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> 3412{ 3413}; 3414 3415template <class _Tp> 3416void __implicit_conversion_to(_Tp) noexcept { } 3417 3418template <class _Tp, class _Arg> 3419struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/true, _Tp, _Arg> 3420 : public integral_constant<bool, noexcept(__implicit_conversion_to<_Tp>(declval<_Arg>()))> 3421{ 3422}; 3423 3424template <class _Tp, bool _IsReference, class... _Args> 3425struct __libcpp_is_nothrow_constructible</*is constructible*/false, _IsReference, _Tp, _Args...> 3426 : public false_type 3427{ 3428}; 3429 3430template <class _Tp, class... _Args> 3431struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3432 : __libcpp_is_nothrow_constructible<is_constructible<_Tp, _Args...>::value, is_reference<_Tp>::value, _Tp, _Args...> 3433{ 3434}; 3435 3436template <class _Tp, size_t _Ns> 3437struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp[_Ns]> 3438 : __libcpp_is_nothrow_constructible<is_constructible<_Tp>::value, is_reference<_Tp>::value, _Tp> 3439{ 3440}; 3441 3442#endif // _LIBCPP_HAS_NO_NOEXCEPT 3443 3444 3445#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3446template <class _Tp, class ..._Args> 3447_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_constructible_v 3448 = is_nothrow_constructible<_Tp, _Args...>::value; 3449#endif 3450 3451// is_nothrow_default_constructible 3452 3453template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_default_constructible 3454 : public is_nothrow_constructible<_Tp> 3455 {}; 3456 3457#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3458template <class _Tp> 3459_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_default_constructible_v 3460 = is_nothrow_default_constructible<_Tp>::value; 3461#endif 3462 3463// is_nothrow_copy_constructible 3464 3465template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_constructible 3466 : public is_nothrow_constructible<_Tp, 3467 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3468 3469#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3470template <class _Tp> 3471_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_copy_constructible_v 3472 = is_nothrow_copy_constructible<_Tp>::value; 3473#endif 3474 3475// is_nothrow_move_constructible 3476 3477template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_constructible 3478 : public is_nothrow_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3479 {}; 3480 3481#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3482template <class _Tp> 3483_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_move_constructible_v 3484 = is_nothrow_move_constructible<_Tp>::value; 3485#endif 3486 3487// is_nothrow_assignable 3488 3489#if __has_keyword(__is_nothrow_assignable) 3490 3491template <class _Tp, class _Arg> 3492struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable 3493 : public integral_constant<bool, __is_nothrow_assignable(_Tp, _Arg)> {}; 3494 3495#else 3496 3497template <bool, class _Tp, class _Arg> struct __libcpp_is_nothrow_assignable; 3498 3499template <class _Tp, class _Arg> 3500struct __libcpp_is_nothrow_assignable<false, _Tp, _Arg> 3501 : public false_type 3502{ 3503}; 3504 3505template <class _Tp, class _Arg> 3506struct __libcpp_is_nothrow_assignable<true, _Tp, _Arg> 3507 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>()) > 3508{ 3509}; 3510 3511template <class _Tp, class _Arg> 3512struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable 3513 : public __libcpp_is_nothrow_assignable<is_assignable<_Tp, _Arg>::value, _Tp, _Arg> 3514{ 3515}; 3516 3517#endif // _LIBCPP_HAS_NO_NOEXCEPT 3518 3519#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3520template <class _Tp, class _Arg> 3521_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_assignable_v 3522 = is_nothrow_assignable<_Tp, _Arg>::value; 3523#endif 3524 3525// is_nothrow_copy_assignable 3526 3527template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_assignable 3528 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 3529 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3530 3531#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3532template <class _Tp> 3533_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_copy_assignable_v 3534 = is_nothrow_copy_assignable<_Tp>::value; 3535#endif 3536 3537// is_nothrow_move_assignable 3538 3539template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_assignable 3540 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 3541 typename add_rvalue_reference<_Tp>::type> 3542 {}; 3543 3544#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3545template <class _Tp> 3546_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_move_assignable_v 3547 = is_nothrow_move_assignable<_Tp>::value; 3548#endif 3549 3550// is_nothrow_destructible 3551 3552#if !defined(_LIBCPP_CXX03_LANG) 3553 3554template <bool, class _Tp> struct __libcpp_is_nothrow_destructible; 3555 3556template <class _Tp> 3557struct __libcpp_is_nothrow_destructible<false, _Tp> 3558 : public false_type 3559{ 3560}; 3561 3562template <class _Tp> 3563struct __libcpp_is_nothrow_destructible<true, _Tp> 3564 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>().~_Tp()) > 3565{ 3566}; 3567 3568template <class _Tp> 3569struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 3570 : public __libcpp_is_nothrow_destructible<is_destructible<_Tp>::value, _Tp> 3571{ 3572}; 3573 3574template <class _Tp, size_t _Ns> 3575struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[_Ns]> 3576 : public is_nothrow_destructible<_Tp> 3577{ 3578}; 3579 3580template <class _Tp> 3581struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&> 3582 : public true_type 3583{ 3584}; 3585 3586template <class _Tp> 3587struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&&> 3588 : public true_type 3589{ 3590}; 3591 3592#else 3593 3594template <class _Tp> struct __libcpp_nothrow_destructor 3595 : public integral_constant<bool, is_scalar<_Tp>::value || 3596 is_reference<_Tp>::value> {}; 3597 3598template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 3599 : public __libcpp_nothrow_destructor<typename remove_all_extents<_Tp>::type> {}; 3600 3601template <class _Tp> 3602struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[]> 3603 : public false_type {}; 3604 3605#endif 3606 3607#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3608template <class _Tp> 3609_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_destructible_v 3610 = is_nothrow_destructible<_Tp>::value; 3611#endif 3612 3613// is_pod 3614 3615#if __has_feature(is_pod) || defined(_LIBCPP_COMPILER_GCC) 3616 3617template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod 3618 : public integral_constant<bool, __is_pod(_Tp)> {}; 3619 3620#else 3621 3622template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod 3623 : public integral_constant<bool, is_trivially_default_constructible<_Tp>::value && 3624 is_trivially_copy_constructible<_Tp>::value && 3625 is_trivially_copy_assignable<_Tp>::value && 3626 is_trivially_destructible<_Tp>::value> {}; 3627 3628#endif 3629 3630#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3631template <class _Tp> 3632_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pod_v 3633 = is_pod<_Tp>::value; 3634#endif 3635 3636// is_literal_type; 3637 3638template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_literal_type 3639 : public integral_constant<bool, __is_literal_type(_Tp)> 3640 {}; 3641 3642#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3643template <class _Tp> 3644_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_literal_type_v 3645 = is_literal_type<_Tp>::value; 3646#endif 3647 3648// is_standard_layout; 3649 3650template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_standard_layout 3651#if __has_feature(is_standard_layout) || defined(_LIBCPP_COMPILER_GCC) 3652 : public integral_constant<bool, __is_standard_layout(_Tp)> 3653#else 3654 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 3655#endif 3656 {}; 3657 3658#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3659template <class _Tp> 3660_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_standard_layout_v 3661 = is_standard_layout<_Tp>::value; 3662#endif 3663 3664// is_trivially_copyable; 3665 3666template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copyable 3667#if __has_feature(is_trivially_copyable) 3668 : public integral_constant<bool, __is_trivially_copyable(_Tp)> 3669#elif _GNUC_VER >= 501 3670 : public integral_constant<bool, !is_volatile<_Tp>::value && __is_trivially_copyable(_Tp)> 3671#else 3672 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 3673#endif 3674 {}; 3675 3676#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3677template <class _Tp> 3678_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copyable_v 3679 = is_trivially_copyable<_Tp>::value; 3680#endif 3681 3682// is_trivial; 3683 3684template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivial 3685#if __has_feature(is_trivial) || defined(_LIBCPP_COMPILER_GCC) 3686 : public integral_constant<bool, __is_trivial(_Tp)> 3687#else 3688 : integral_constant<bool, is_trivially_copyable<_Tp>::value && 3689 is_trivially_default_constructible<_Tp>::value> 3690#endif 3691 {}; 3692 3693#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3694template <class _Tp> 3695_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivial_v 3696 = is_trivial<_Tp>::value; 3697#endif 3698 3699template <class _Tp> struct __is_reference_wrapper_impl : public false_type {}; 3700template <class _Tp> struct __is_reference_wrapper_impl<reference_wrapper<_Tp> > : public true_type {}; 3701template <class _Tp> struct __is_reference_wrapper 3702 : public __is_reference_wrapper_impl<typename remove_cv<_Tp>::type> {}; 3703 3704#ifndef _LIBCPP_CXX03_LANG 3705 3706template <class _Fp, class _A0, 3707 class _DecayFp = typename decay<_Fp>::type, 3708 class _DecayA0 = typename decay<_A0>::type, 3709 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3710using __enable_if_bullet1 = typename enable_if 3711 < 3712 is_member_function_pointer<_DecayFp>::value 3713 && is_base_of<_ClassT, _DecayA0>::value 3714 >::type; 3715 3716template <class _Fp, class _A0, 3717 class _DecayFp = typename decay<_Fp>::type, 3718 class _DecayA0 = typename decay<_A0>::type> 3719using __enable_if_bullet2 = typename enable_if 3720 < 3721 is_member_function_pointer<_DecayFp>::value 3722 && __is_reference_wrapper<_DecayA0>::value 3723 >::type; 3724 3725template <class _Fp, class _A0, 3726 class _DecayFp = typename decay<_Fp>::type, 3727 class _DecayA0 = typename decay<_A0>::type, 3728 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3729using __enable_if_bullet3 = typename enable_if 3730 < 3731 is_member_function_pointer<_DecayFp>::value 3732 && !is_base_of<_ClassT, _DecayA0>::value 3733 && !__is_reference_wrapper<_DecayA0>::value 3734 >::type; 3735 3736template <class _Fp, class _A0, 3737 class _DecayFp = typename decay<_Fp>::type, 3738 class _DecayA0 = typename decay<_A0>::type, 3739 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3740using __enable_if_bullet4 = typename enable_if 3741 < 3742 is_member_object_pointer<_DecayFp>::value 3743 && is_base_of<_ClassT, _DecayA0>::value 3744 >::type; 3745 3746template <class _Fp, class _A0, 3747 class _DecayFp = typename decay<_Fp>::type, 3748 class _DecayA0 = typename decay<_A0>::type> 3749using __enable_if_bullet5 = typename enable_if 3750 < 3751 is_member_object_pointer<_DecayFp>::value 3752 && __is_reference_wrapper<_DecayA0>::value 3753 >::type; 3754 3755template <class _Fp, class _A0, 3756 class _DecayFp = typename decay<_Fp>::type, 3757 class _DecayA0 = typename decay<_A0>::type, 3758 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 3759using __enable_if_bullet6 = typename enable_if 3760 < 3761 is_member_object_pointer<_DecayFp>::value 3762 && !is_base_of<_ClassT, _DecayA0>::value 3763 && !__is_reference_wrapper<_DecayA0>::value 3764 >::type; 3765 3766// __invoke forward declarations 3767 3768// fall back - none of the bullets 3769 3770#define _LIBCPP_INVOKE_RETURN(...) \ 3771 noexcept(noexcept(__VA_ARGS__)) -> decltype(__VA_ARGS__) \ 3772 { return __VA_ARGS__; } 3773 3774template <class ..._Args> 3775auto __invoke(__any, _Args&& ...__args) -> __nat; 3776 3777template <class ..._Args> 3778auto __invoke_constexpr(__any, _Args&& ...__args) -> __nat; 3779 3780// bullets 1, 2 and 3 3781 3782template <class _Fp, class _A0, class ..._Args, 3783 class = __enable_if_bullet1<_Fp, _A0>> 3784inline _LIBCPP_INLINE_VISIBILITY 3785auto 3786__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3787_LIBCPP_INVOKE_RETURN((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) 3788 3789template <class _Fp, class _A0, class ..._Args, 3790 class = __enable_if_bullet1<_Fp, _A0>> 3791inline _LIBCPP_INLINE_VISIBILITY 3792_LIBCPP_CONSTEXPR auto 3793__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3794_LIBCPP_INVOKE_RETURN((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) 3795 3796template <class _Fp, class _A0, class ..._Args, 3797 class = __enable_if_bullet2<_Fp, _A0>> 3798inline _LIBCPP_INLINE_VISIBILITY 3799auto 3800__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3801_LIBCPP_INVOKE_RETURN((__a0.get().*__f)(_VSTD::forward<_Args>(__args)...)) 3802 3803template <class _Fp, class _A0, class ..._Args, 3804 class = __enable_if_bullet2<_Fp, _A0>> 3805inline _LIBCPP_INLINE_VISIBILITY 3806_LIBCPP_CONSTEXPR auto 3807__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3808_LIBCPP_INVOKE_RETURN((__a0.get().*__f)(_VSTD::forward<_Args>(__args)...)) 3809 3810template <class _Fp, class _A0, class ..._Args, 3811 class = __enable_if_bullet3<_Fp, _A0>> 3812inline _LIBCPP_INLINE_VISIBILITY 3813auto 3814__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3815_LIBCPP_INVOKE_RETURN(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) 3816 3817template <class _Fp, class _A0, class ..._Args, 3818 class = __enable_if_bullet3<_Fp, _A0>> 3819inline _LIBCPP_INLINE_VISIBILITY 3820_LIBCPP_CONSTEXPR auto 3821__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 3822_LIBCPP_INVOKE_RETURN(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) 3823 3824// bullets 4, 5 and 6 3825 3826template <class _Fp, class _A0, 3827 class = __enable_if_bullet4<_Fp, _A0>> 3828inline _LIBCPP_INLINE_VISIBILITY 3829auto 3830__invoke(_Fp&& __f, _A0&& __a0) 3831_LIBCPP_INVOKE_RETURN(_VSTD::forward<_A0>(__a0).*__f) 3832 3833template <class _Fp, class _A0, 3834 class = __enable_if_bullet4<_Fp, _A0>> 3835inline _LIBCPP_INLINE_VISIBILITY 3836_LIBCPP_CONSTEXPR auto 3837__invoke_constexpr(_Fp&& __f, _A0&& __a0) 3838_LIBCPP_INVOKE_RETURN(_VSTD::forward<_A0>(__a0).*__f) 3839 3840template <class _Fp, class _A0, 3841 class = __enable_if_bullet5<_Fp, _A0>> 3842inline _LIBCPP_INLINE_VISIBILITY 3843auto 3844__invoke(_Fp&& __f, _A0&& __a0) 3845_LIBCPP_INVOKE_RETURN(__a0.get().*__f) 3846 3847template <class _Fp, class _A0, 3848 class = __enable_if_bullet5<_Fp, _A0>> 3849inline _LIBCPP_INLINE_VISIBILITY 3850_LIBCPP_CONSTEXPR auto 3851__invoke_constexpr(_Fp&& __f, _A0&& __a0) 3852_LIBCPP_INVOKE_RETURN(__a0.get().*__f) 3853 3854template <class _Fp, class _A0, 3855 class = __enable_if_bullet6<_Fp, _A0>> 3856inline _LIBCPP_INLINE_VISIBILITY 3857auto 3858__invoke(_Fp&& __f, _A0&& __a0) 3859_LIBCPP_INVOKE_RETURN((*_VSTD::forward<_A0>(__a0)).*__f) 3860 3861template <class _Fp, class _A0, 3862 class = __enable_if_bullet6<_Fp, _A0>> 3863inline _LIBCPP_INLINE_VISIBILITY 3864_LIBCPP_CONSTEXPR auto 3865__invoke_constexpr(_Fp&& __f, _A0&& __a0) 3866_LIBCPP_INVOKE_RETURN((*_VSTD::forward<_A0>(__a0)).*__f) 3867 3868// bullet 7 3869 3870template <class _Fp, class ..._Args> 3871inline _LIBCPP_INLINE_VISIBILITY 3872auto 3873__invoke(_Fp&& __f, _Args&& ...__args) 3874_LIBCPP_INVOKE_RETURN(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) 3875 3876template <class _Fp, class ..._Args> 3877inline _LIBCPP_INLINE_VISIBILITY 3878_LIBCPP_CONSTEXPR auto 3879__invoke_constexpr(_Fp&& __f, _Args&& ...__args) 3880_LIBCPP_INVOKE_RETURN(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) 3881 3882#undef _LIBCPP_INVOKE_RETURN 3883 3884// __invokable 3885template <class _Ret, class _Fp, class ..._Args> 3886struct __invokable_r 3887{ 3888 template <class _XFp, class ..._XArgs> 3889 static auto __try_call(int) -> decltype( 3890 _VSTD::__invoke(_VSTD::declval<_XFp>(), _VSTD::declval<_XArgs>()...)); 3891 template <class _XFp, class ..._XArgs> 3892 static __nat __try_call(...); 3893 3894 // FIXME: Check that _Ret, _Fp, and _Args... are all complete types, cv void, 3895 // or incomplete array types as required by the standard. 3896 using _Result = decltype(__try_call<_Fp, _Args...>(0)); 3897 3898 using type = 3899 typename conditional< 3900 _IsNotSame<_Result, __nat>::value, 3901 typename conditional< 3902 is_void<_Ret>::value, 3903 true_type, 3904 is_convertible<_Result, _Ret> 3905 >::type, 3906 false_type 3907 >::type; 3908 static const bool value = type::value; 3909}; 3910template <class _Fp, class ..._Args> 3911using __invokable = __invokable_r<void, _Fp, _Args...>; 3912 3913template <bool _IsInvokable, bool _IsCVVoid, class _Ret, class _Fp, class ..._Args> 3914struct __nothrow_invokable_r_imp { 3915 static const bool value = false; 3916}; 3917 3918template <class _Ret, class _Fp, class ..._Args> 3919struct __nothrow_invokable_r_imp<true, false, _Ret, _Fp, _Args...> 3920{ 3921 typedef __nothrow_invokable_r_imp _ThisT; 3922 3923 template <class _Tp> 3924 static void __test_noexcept(_Tp) noexcept; 3925 3926 static const bool value = noexcept(_ThisT::__test_noexcept<_Ret>( 3927 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...))); 3928}; 3929 3930template <class _Ret, class _Fp, class ..._Args> 3931struct __nothrow_invokable_r_imp<true, true, _Ret, _Fp, _Args...> 3932{ 3933 static const bool value = noexcept( 3934 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...)); 3935}; 3936 3937template <class _Ret, class _Fp, class ..._Args> 3938using __nothrow_invokable_r = 3939 __nothrow_invokable_r_imp< 3940 __invokable_r<_Ret, _Fp, _Args...>::value, 3941 is_void<_Ret>::value, 3942 _Ret, _Fp, _Args... 3943 >; 3944 3945template <class _Fp, class ..._Args> 3946using __nothrow_invokable = 3947 __nothrow_invokable_r_imp< 3948 __invokable<_Fp, _Args...>::value, 3949 true, void, _Fp, _Args... 3950 >; 3951 3952template <class _Fp, class ..._Args> 3953struct __invoke_of 3954 : public enable_if< 3955 __invokable<_Fp, _Args...>::value, 3956 typename __invokable_r<void, _Fp, _Args...>::_Result> 3957{ 3958}; 3959 3960// result_of 3961 3962template <class _Fp, class ..._Args> 3963class _LIBCPP_TEMPLATE_VIS result_of<_Fp(_Args...)> 3964 : public __invoke_of<_Fp, _Args...> 3965{ 3966}; 3967 3968#if _LIBCPP_STD_VER > 11 3969template <class _Tp> using result_of_t = typename result_of<_Tp>::type; 3970#endif 3971 3972#if _LIBCPP_STD_VER > 14 3973 3974// invoke_result 3975 3976template <class _Fn, class... _Args> 3977struct _LIBCPP_TEMPLATE_VIS invoke_result 3978 : __invoke_of<_Fn, _Args...> 3979{ 3980}; 3981 3982template <class _Fn, class... _Args> 3983using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; 3984 3985// is_invocable 3986 3987template <class _Fn, class ..._Args> 3988struct _LIBCPP_TEMPLATE_VIS is_invocable 3989 : integral_constant<bool, __invokable<_Fn, _Args...>::value> {}; 3990 3991template <class _Ret, class _Fn, class ..._Args> 3992struct _LIBCPP_TEMPLATE_VIS is_invocable_r 3993 : integral_constant<bool, __invokable_r<_Ret, _Fn, _Args...>::value> {}; 3994 3995template <class _Fn, class ..._Args> 3996_LIBCPP_INLINE_VAR constexpr bool is_invocable_v 3997 = is_invocable<_Fn, _Args...>::value; 3998 3999template <class _Ret, class _Fn, class ..._Args> 4000_LIBCPP_INLINE_VAR constexpr bool is_invocable_r_v 4001 = is_invocable_r<_Ret, _Fn, _Args...>::value; 4002 4003// is_nothrow_invocable 4004 4005template <class _Fn, class ..._Args> 4006struct _LIBCPP_TEMPLATE_VIS is_nothrow_invocable 4007 : integral_constant<bool, __nothrow_invokable<_Fn, _Args...>::value> {}; 4008 4009template <class _Ret, class _Fn, class ..._Args> 4010struct _LIBCPP_TEMPLATE_VIS is_nothrow_invocable_r 4011 : integral_constant<bool, __nothrow_invokable_r<_Ret, _Fn, _Args...>::value> {}; 4012 4013template <class _Fn, class ..._Args> 4014_LIBCPP_INLINE_VAR constexpr bool is_nothrow_invocable_v 4015 = is_nothrow_invocable<_Fn, _Args...>::value; 4016 4017template <class _Ret, class _Fn, class ..._Args> 4018_LIBCPP_INLINE_VAR constexpr bool is_nothrow_invocable_r_v 4019 = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value; 4020 4021#endif // _LIBCPP_STD_VER > 14 4022 4023#endif // !defined(_LIBCPP_CXX03_LANG) 4024 4025template <class _Tp> struct __is_swappable; 4026template <class _Tp> struct __is_nothrow_swappable; 4027 4028// swap, swap_ranges 4029 4030template <class _ForwardIterator1, class _ForwardIterator2> 4031inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4032_ForwardIterator2 4033swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2); 4034 4035template <class _Tp> 4036inline _LIBCPP_INLINE_VISIBILITY 4037#ifndef _LIBCPP_CXX03_LANG 4038typename enable_if 4039< 4040 is_move_constructible<_Tp>::value && 4041 is_move_assignable<_Tp>::value 4042>::type 4043#else 4044void 4045#endif 4046_LIBCPP_CONSTEXPR_AFTER_CXX17 4047swap(_Tp& __x, _Tp& __y) _NOEXCEPT_(is_nothrow_move_constructible<_Tp>::value && 4048 is_nothrow_move_assignable<_Tp>::value) 4049{ 4050 _Tp __t(_VSTD::move(__x)); 4051 __x = _VSTD::move(__y); 4052 __y = _VSTD::move(__t); 4053} 4054 4055template<class _Tp, size_t _Np> 4056inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4057typename enable_if< 4058 __is_swappable<_Tp>::value 4059>::type 4060swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np]) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value) 4061{ 4062 _VSTD::swap_ranges(__a, __a + _Np, __b); 4063} 4064 4065template <class _ForwardIterator1, class _ForwardIterator2> 4066inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4067_ForwardIterator2 4068swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) 4069{ 4070 for(; __first1 != __last1; ++__first1, (void) ++__first2) 4071 swap(*__first1, *__first2); 4072 return __first2; 4073} 4074 4075// iter_swap 4076 4077template <class _ForwardIterator1, class _ForwardIterator2> 4078inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 4079void 4080iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) 4081 // _NOEXCEPT_(_NOEXCEPT_(swap(*__a, *__b))) 4082 _NOEXCEPT_(_NOEXCEPT_(swap(*_VSTD::declval<_ForwardIterator1>(), 4083 *_VSTD::declval<_ForwardIterator2>()))) 4084{ 4085 swap(*__a, *__b); 4086} 4087 4088// __swappable 4089 4090namespace __detail 4091{ 4092// ALL generic swap overloads MUST already have a declaration available at this point. 4093 4094template <class _Tp, class _Up = _Tp, 4095 bool _NotVoid = !is_void<_Tp>::value && !is_void<_Up>::value> 4096struct __swappable_with 4097{ 4098 template <class _LHS, class _RHS> 4099 static decltype(swap(_VSTD::declval<_LHS>(), _VSTD::declval<_RHS>())) 4100 __test_swap(int); 4101 template <class, class> 4102 static __nat __test_swap(long); 4103 4104 // Extra parens are needed for the C++03 definition of decltype. 4105 typedef decltype((__test_swap<_Tp, _Up>(0))) __swap1; 4106 typedef decltype((__test_swap<_Up, _Tp>(0))) __swap2; 4107 4108 static const bool value = _IsNotSame<__swap1, __nat>::value 4109 && _IsNotSame<__swap2, __nat>::value; 4110}; 4111 4112template <class _Tp, class _Up> 4113struct __swappable_with<_Tp, _Up, false> : false_type {}; 4114 4115template <class _Tp, class _Up = _Tp, bool _Swappable = __swappable_with<_Tp, _Up>::value> 4116struct __nothrow_swappable_with { 4117 static const bool value = 4118#ifndef _LIBCPP_HAS_NO_NOEXCEPT 4119 noexcept(swap(_VSTD::declval<_Tp>(), _VSTD::declval<_Up>())) 4120 && noexcept(swap(_VSTD::declval<_Up>(), _VSTD::declval<_Tp>())); 4121#else 4122 false; 4123#endif 4124}; 4125 4126template <class _Tp, class _Up> 4127struct __nothrow_swappable_with<_Tp, _Up, false> : false_type {}; 4128 4129} // __detail 4130 4131template <class _Tp> 4132struct __is_swappable 4133 : public integral_constant<bool, __detail::__swappable_with<_Tp&>::value> 4134{ 4135}; 4136 4137template <class _Tp> 4138struct __is_nothrow_swappable 4139 : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp&>::value> 4140{ 4141}; 4142 4143#if _LIBCPP_STD_VER > 14 4144 4145template <class _Tp, class _Up> 4146struct _LIBCPP_TEMPLATE_VIS is_swappable_with 4147 : public integral_constant<bool, __detail::__swappable_with<_Tp, _Up>::value> 4148{ 4149}; 4150 4151template <class _Tp> 4152struct _LIBCPP_TEMPLATE_VIS is_swappable 4153 : public conditional< 4154 __is_referenceable<_Tp>::value, 4155 is_swappable_with< 4156 typename add_lvalue_reference<_Tp>::type, 4157 typename add_lvalue_reference<_Tp>::type>, 4158 false_type 4159 >::type 4160{ 4161}; 4162 4163template <class _Tp, class _Up> 4164struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable_with 4165 : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp, _Up>::value> 4166{ 4167}; 4168 4169template <class _Tp> 4170struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable 4171 : public conditional< 4172 __is_referenceable<_Tp>::value, 4173 is_nothrow_swappable_with< 4174 typename add_lvalue_reference<_Tp>::type, 4175 typename add_lvalue_reference<_Tp>::type>, 4176 false_type 4177 >::type 4178{ 4179}; 4180 4181template <class _Tp, class _Up> 4182_LIBCPP_INLINE_VAR constexpr bool is_swappable_with_v 4183 = is_swappable_with<_Tp, _Up>::value; 4184 4185template <class _Tp> 4186_LIBCPP_INLINE_VAR constexpr bool is_swappable_v 4187 = is_swappable<_Tp>::value; 4188 4189template <class _Tp, class _Up> 4190_LIBCPP_INLINE_VAR constexpr bool is_nothrow_swappable_with_v 4191 = is_nothrow_swappable_with<_Tp, _Up>::value; 4192 4193template <class _Tp> 4194_LIBCPP_INLINE_VAR constexpr bool is_nothrow_swappable_v 4195 = is_nothrow_swappable<_Tp>::value; 4196 4197#endif // _LIBCPP_STD_VER > 14 4198 4199template <class _Tp, bool = is_enum<_Tp>::value> struct __underlying_type_impl; 4200 4201template <class _Tp> 4202struct __underlying_type_impl<_Tp, false> {}; 4203 4204template <class _Tp> 4205struct __underlying_type_impl<_Tp, true> 4206{ 4207 typedef __underlying_type(_Tp) type; 4208}; 4209 4210template <class _Tp> 4211struct underlying_type : __underlying_type_impl<_Tp, is_enum<_Tp>::value> {}; 4212 4213#if _LIBCPP_STD_VER > 11 4214template <class _Tp> using underlying_type_t = typename underlying_type<_Tp>::type; 4215#endif 4216 4217template <class _Tp, bool = is_enum<_Tp>::value> 4218struct __sfinae_underlying_type 4219{ 4220 typedef typename underlying_type<_Tp>::type type; 4221 typedef decltype(((type)1) + 0) __promoted_type; 4222}; 4223 4224template <class _Tp> 4225struct __sfinae_underlying_type<_Tp, false> {}; 4226 4227inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4228int __convert_to_integral(int __val) { return __val; } 4229 4230inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4231unsigned __convert_to_integral(unsigned __val) { return __val; } 4232 4233inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4234long __convert_to_integral(long __val) { return __val; } 4235 4236inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4237unsigned long __convert_to_integral(unsigned long __val) { return __val; } 4238 4239inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4240long long __convert_to_integral(long long __val) { return __val; } 4241 4242inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4243unsigned long long __convert_to_integral(unsigned long long __val) {return __val; } 4244 4245template<typename _Fp> 4246inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4247typename enable_if<is_floating_point<_Fp>::value, long long>::type 4248 __convert_to_integral(_Fp __val) { return __val; } 4249 4250#ifndef _LIBCPP_HAS_NO_INT128 4251inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4252__int128_t __convert_to_integral(__int128_t __val) { return __val; } 4253 4254inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4255__uint128_t __convert_to_integral(__uint128_t __val) { return __val; } 4256#endif 4257 4258template <class _Tp> 4259inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4260typename __sfinae_underlying_type<_Tp>::__promoted_type 4261__convert_to_integral(_Tp __val) { return __val; } 4262 4263#ifndef _LIBCPP_CXX03_LANG 4264 4265template <class _Tp> 4266struct __has_operator_addressof_member_imp 4267{ 4268 template <class _Up> 4269 static auto __test(int) 4270 -> typename __select_2nd<decltype(_VSTD::declval<_Up>().operator&()), true_type>::type; 4271 template <class> 4272 static auto __test(long) -> false_type; 4273 4274 static const bool value = decltype(__test<_Tp>(0))::value; 4275}; 4276 4277template <class _Tp> 4278struct __has_operator_addressof_free_imp 4279{ 4280 template <class _Up> 4281 static auto __test(int) 4282 -> typename __select_2nd<decltype(operator&(_VSTD::declval<_Up>())), true_type>::type; 4283 template <class> 4284 static auto __test(long) -> false_type; 4285 4286 static const bool value = decltype(__test<_Tp>(0))::value; 4287}; 4288 4289template <class _Tp> 4290struct __has_operator_addressof 4291 : public integral_constant<bool, __has_operator_addressof_member_imp<_Tp>::value 4292 || __has_operator_addressof_free_imp<_Tp>::value> 4293{}; 4294 4295#endif // _LIBCPP_CXX03_LANG 4296 4297#if _LIBCPP_STD_VER > 14 4298 4299template <class...> using void_t = void; 4300 4301template <class... _Args> 4302struct conjunction : _And<_Args...> {}; 4303template<class... _Args> 4304_LIBCPP_INLINE_VAR constexpr bool conjunction_v 4305 = conjunction<_Args...>::value; 4306 4307template <class... _Args> 4308struct disjunction : _Or<_Args...> {}; 4309template<class... _Args> 4310_LIBCPP_INLINE_VAR constexpr bool disjunction_v 4311 = disjunction<_Args...>::value; 4312 4313template <class _Tp> 4314struct negation : _Not<_Tp> {}; 4315template<class _Tp> 4316_LIBCPP_INLINE_VAR constexpr bool negation_v 4317 = negation<_Tp>::value; 4318#endif // _LIBCPP_STD_VER > 14 4319 4320// These traits are used in __tree and __hash_table 4321#ifndef _LIBCPP_CXX03_LANG 4322struct __extract_key_fail_tag {}; 4323struct __extract_key_self_tag {}; 4324struct __extract_key_first_tag {}; 4325 4326template <class _ValTy, class _Key, 4327 class _RawValTy = typename __unconstref<_ValTy>::type> 4328struct __can_extract_key 4329 : conditional<_IsSame<_RawValTy, _Key>::value, __extract_key_self_tag, 4330 __extract_key_fail_tag>::type {}; 4331 4332template <class _Pair, class _Key, class _First, class _Second> 4333struct __can_extract_key<_Pair, _Key, pair<_First, _Second>> 4334 : conditional<_IsSame<typename remove_const<_First>::type, _Key>::value, 4335 __extract_key_first_tag, __extract_key_fail_tag>::type {}; 4336 4337// __can_extract_map_key uses true_type/false_type instead of the tags. 4338// It returns true if _Key != _ContainerValueTy (the container is a map not a set) 4339// and _ValTy == _Key. 4340template <class _ValTy, class _Key, class _ContainerValueTy, 4341 class _RawValTy = typename __unconstref<_ValTy>::type> 4342struct __can_extract_map_key 4343 : integral_constant<bool, _IsSame<_RawValTy, _Key>::value> {}; 4344 4345// This specialization returns __extract_key_fail_tag for non-map containers 4346// because _Key == _ContainerValueTy 4347template <class _ValTy, class _Key, class _RawValTy> 4348struct __can_extract_map_key<_ValTy, _Key, _Key, _RawValTy> 4349 : false_type {}; 4350 4351#endif 4352 4353#ifndef _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED 4354#if _LIBCPP_STD_VER > 17 4355_LIBCPP_INLINE_VISIBILITY 4356inline constexpr bool is_constant_evaluated() noexcept { 4357 return __builtin_is_constant_evaluated(); 4358} 4359#endif 4360 4361inline _LIBCPP_CONSTEXPR 4362bool __libcpp_is_constant_evaluated() _NOEXCEPT { return __builtin_is_constant_evaluated(); } 4363#else 4364inline _LIBCPP_CONSTEXPR 4365bool __libcpp_is_constant_evaluated() _NOEXCEPT { return false; } 4366#endif 4367 4368template <class _CharT> 4369using _IsCharLikeType = _And<is_standard_layout<_CharT>, is_trivial<_CharT> >; 4370 4371_LIBCPP_END_NAMESPACE_STD 4372 4373#if _LIBCPP_STD_VER > 14 4374// std::byte 4375namespace std // purposefully not versioned 4376{ 4377 4378 4379} 4380#endif 4381 4382#endif // _LIBCPP_TYPE_TRAITS 4383