1// -*- C++ -*- 2//===------------------------ type_traits ---------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is dual licensed under the MIT and the University of Illinois Open 7// Source Licenses. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_TYPE_TRAITS 12#define _LIBCPP_TYPE_TRAITS 13 14/* 15 type_traits synopsis 16 17namespace std 18{ 19 20 // helper class: 21 template <class T, T v> struct integral_constant; 22 typedef integral_constant<bool, true> true_type; // C++11 23 typedef integral_constant<bool, false> false_type; // C++11 24 25 template <bool B> // C++14 26 using bool_constant = integral_constant<bool, B>; // C++14 27 typedef bool_constant<true> true_type; // C++14 28 typedef bool_constant<false> false_type; // C++14 29 30 // helper traits 31 template <bool, class T = void> struct enable_if; 32 template <bool, class T, class F> struct conditional; 33 34 // Primary classification traits: 35 template <class T> struct is_void; 36 template <class T> struct is_null_pointer; // C++14 37 template <class T> struct is_integral; 38 template <class T> struct is_floating_point; 39 template <class T> struct is_array; 40 template <class T> struct is_pointer; 41 template <class T> struct is_lvalue_reference; 42 template <class T> struct is_rvalue_reference; 43 template <class T> struct is_member_object_pointer; 44 template <class T> struct is_member_function_pointer; 45 template <class T> struct is_enum; 46 template <class T> struct is_union; 47 template <class T> struct is_class; 48 template <class T> struct is_function; 49 50 // Secondary classification traits: 51 template <class T> struct is_reference; 52 template <class T> struct is_arithmetic; 53 template <class T> struct is_fundamental; 54 template <class T> struct is_member_pointer; 55 template <class T> struct is_scalar; 56 template <class T> struct is_object; 57 template <class T> struct is_compound; 58 59 // Const-volatile properties and transformations: 60 template <class T> struct is_const; 61 template <class T> struct is_volatile; 62 template <class T> struct remove_const; 63 template <class T> struct remove_volatile; 64 template <class T> struct remove_cv; 65 template <class T> struct add_const; 66 template <class T> struct add_volatile; 67 template <class T> struct add_cv; 68 69 // Reference transformations: 70 template <class T> struct remove_reference; 71 template <class T> struct add_lvalue_reference; 72 template <class T> struct add_rvalue_reference; 73 74 // Pointer transformations: 75 template <class T> struct remove_pointer; 76 template <class T> struct add_pointer; 77 78 template<class T> struct type_identity; // C++20 79 template<class T> 80 using type_identity_t = typename type_identity<T>::type; // C++20 81 82 // Integral properties: 83 template <class T> struct is_signed; 84 template <class T> struct is_unsigned; 85 template <class T> struct make_signed; 86 template <class T> struct make_unsigned; 87 88 // Array properties and transformations: 89 template <class T> struct rank; 90 template <class T, unsigned I = 0> struct extent; 91 template <class T> struct remove_extent; 92 template <class T> struct remove_all_extents; 93 94 // Member introspection: 95 template <class T> struct is_pod; 96 template <class T> struct is_trivial; 97 template <class T> struct is_trivially_copyable; 98 template <class T> struct is_standard_layout; 99 template <class T> struct is_literal_type; 100 template <class T> struct is_empty; 101 template <class T> struct is_polymorphic; 102 template <class T> struct is_abstract; 103 template <class T> struct is_final; // C++14 104 template <class T> struct is_aggregate; // C++17 105 106 template <class T, class... Args> struct is_constructible; 107 template <class T> struct is_default_constructible; 108 template <class T> struct is_copy_constructible; 109 template <class T> struct is_move_constructible; 110 template <class T, class U> struct is_assignable; 111 template <class T> struct is_copy_assignable; 112 template <class T> struct is_move_assignable; 113 template <class T, class U> struct is_swappable_with; // C++17 114 template <class T> struct is_swappable; // C++17 115 template <class T> struct is_destructible; 116 117 template <class T, class... Args> struct is_trivially_constructible; 118 template <class T> struct is_trivially_default_constructible; 119 template <class T> struct is_trivially_copy_constructible; 120 template <class T> struct is_trivially_move_constructible; 121 template <class T, class U> struct is_trivially_assignable; 122 template <class T> struct is_trivially_copy_assignable; 123 template <class T> struct is_trivially_move_assignable; 124 template <class T> struct is_trivially_destructible; 125 126 template <class T, class... Args> struct is_nothrow_constructible; 127 template <class T> struct is_nothrow_default_constructible; 128 template <class T> struct is_nothrow_copy_constructible; 129 template <class T> struct is_nothrow_move_constructible; 130 template <class T, class U> struct is_nothrow_assignable; 131 template <class T> struct is_nothrow_copy_assignable; 132 template <class T> struct is_nothrow_move_assignable; 133 template <class T, class U> struct is_nothrow_swappable_with; // C++17 134 template <class T> struct is_nothrow_swappable; // C++17 135 template <class T> struct is_nothrow_destructible; 136 137 template <class T> struct has_virtual_destructor; 138 139 template<class T> struct has_unique_object_representations; // C++17 140 141 // Relationships between types: 142 template <class T, class U> struct is_same; 143 template <class Base, class Derived> struct is_base_of; 144 template <class From, class To> struct is_convertible; 145 146 template <class Fn, class... ArgTypes> struct is_invocable; 147 template <class R, class Fn, class... ArgTypes> struct is_invocable_r; 148 149 template <class Fn, class... ArgTypes> struct is_nothrow_invocable; 150 template <class R, class Fn, class... ArgTypes> struct is_nothrow_invocable_r; 151 152 // Alignment properties and transformations: 153 template <class T> struct alignment_of; 154 template <size_t Len, size_t Align = most_stringent_alignment_requirement> 155 struct aligned_storage; 156 template <size_t Len, class... Types> struct aligned_union; 157 template <class T> struct remove_cvref; // C++20 158 159 template <class T> struct decay; 160 template <class... T> struct common_type; 161 template <class T> struct underlying_type; 162 template <class> class result_of; // undefined 163 template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; 164 template <class Fn, class... ArgTypes> struct invoke_result; // C++17 165 166 // const-volatile modifications: 167 template <class T> 168 using remove_const_t = typename remove_const<T>::type; // C++14 169 template <class T> 170 using remove_volatile_t = typename remove_volatile<T>::type; // C++14 171 template <class T> 172 using remove_cv_t = typename remove_cv<T>::type; // C++14 173 template <class T> 174 using add_const_t = typename add_const<T>::type; // C++14 175 template <class T> 176 using add_volatile_t = typename add_volatile<T>::type; // C++14 177 template <class T> 178 using add_cv_t = typename add_cv<T>::type; // C++14 179 180 // reference modifications: 181 template <class T> 182 using remove_reference_t = typename remove_reference<T>::type; // C++14 183 template <class T> 184 using add_lvalue_reference_t = typename add_lvalue_reference<T>::type; // C++14 185 template <class T> 186 using add_rvalue_reference_t = typename add_rvalue_reference<T>::type; // C++14 187 188 // sign modifications: 189 template <class T> 190 using make_signed_t = typename make_signed<T>::type; // C++14 191 template <class T> 192 using make_unsigned_t = typename make_unsigned<T>::type; // C++14 193 194 // array modifications: 195 template <class T> 196 using remove_extent_t = typename remove_extent<T>::type; // C++14 197 template <class T> 198 using remove_all_extents_t = typename remove_all_extents<T>::type; // C++14 199 200 // pointer modifications: 201 template <class T> 202 using remove_pointer_t = typename remove_pointer<T>::type; // C++14 203 template <class T> 204 using add_pointer_t = typename add_pointer<T>::type; // C++14 205 206 // other transformations: 207 template <size_t Len, std::size_t Align=default-alignment> 208 using aligned_storage_t = typename aligned_storage<Len,Align>::type; // C++14 209 template <std::size_t Len, class... Types> 210 using aligned_union_t = typename aligned_union<Len,Types...>::type; // C++14 211 template <class T> 212 using remove_cvref_t = typename remove_cvref<T>::type; // C++20 213 template <class T> 214 using decay_t = typename decay<T>::type; // C++14 215 template <bool b, class T=void> 216 using enable_if_t = typename enable_if<b,T>::type; // C++14 217 template <bool b, class T, class F> 218 using conditional_t = typename conditional<b,T,F>::type; // C++14 219 template <class... T> 220 using common_type_t = typename common_type<T...>::type; // C++14 221 template <class T> 222 using underlying_type_t = typename underlying_type<T>::type; // C++14 223 template <class T> 224 using result_of_t = typename result_of<T>::type; // C++14 225 template <class Fn, class... ArgTypes> 226 using invoke_result_t = typename invoke_result<Fn, ArgTypes...>::type; // C++17 227 228 template <class...> 229 using void_t = void; // C++17 230 231 // See C++14 20.10.4.1, primary type categories 232 template <class T> inline constexpr bool is_void_v 233 = is_void<T>::value; // C++17 234 template <class T> inline constexpr bool is_null_pointer_v 235 = is_null_pointer<T>::value; // C++17 236 template <class T> inline constexpr bool is_integral_v 237 = is_integral<T>::value; // C++17 238 template <class T> inline constexpr bool is_floating_point_v 239 = is_floating_point<T>::value; // C++17 240 template <class T> inline constexpr bool is_array_v 241 = is_array<T>::value; // C++17 242 template <class T> inline constexpr bool is_pointer_v 243 = is_pointer<T>::value; // C++17 244 template <class T> inline constexpr bool is_lvalue_reference_v 245 = is_lvalue_reference<T>::value; // C++17 246 template <class T> inline constexpr bool is_rvalue_reference_v 247 = is_rvalue_reference<T>::value; // C++17 248 template <class T> inline constexpr bool is_member_object_pointer_v 249 = is_member_object_pointer<T>::value; // C++17 250 template <class T> inline constexpr bool is_member_function_pointer_v 251 = is_member_function_pointer<T>::value; // C++17 252 template <class T> inline constexpr bool is_enum_v 253 = is_enum<T>::value; // C++17 254 template <class T> inline constexpr bool is_union_v 255 = is_union<T>::value; // C++17 256 template <class T> inline constexpr bool is_class_v 257 = is_class<T>::value; // C++17 258 template <class T> inline constexpr bool is_function_v 259 = is_function<T>::value; // C++17 260 261 // See C++14 20.10.4.2, composite type categories 262 template <class T> inline constexpr bool is_reference_v 263 = is_reference<T>::value; // C++17 264 template <class T> inline constexpr bool is_arithmetic_v 265 = is_arithmetic<T>::value; // C++17 266 template <class T> inline constexpr bool is_fundamental_v 267 = is_fundamental<T>::value; // C++17 268 template <class T> inline constexpr bool is_object_v 269 = is_object<T>::value; // C++17 270 template <class T> inline constexpr bool is_scalar_v 271 = is_scalar<T>::value; // C++17 272 template <class T> inline constexpr bool is_compound_v 273 = is_compound<T>::value; // C++17 274 template <class T> inline constexpr bool is_member_pointer_v 275 = is_member_pointer<T>::value; // C++17 276 277 // See C++14 20.10.4.3, type properties 278 template <class T> inline constexpr bool is_const_v 279 = is_const<T>::value; // C++17 280 template <class T> inline constexpr bool is_volatile_v 281 = is_volatile<T>::value; // C++17 282 template <class T> inline constexpr bool is_trivial_v 283 = is_trivial<T>::value; // C++17 284 template <class T> inline constexpr bool is_trivially_copyable_v 285 = is_trivially_copyable<T>::value; // C++17 286 template <class T> inline constexpr bool is_standard_layout_v 287 = is_standard_layout<T>::value; // C++17 288 template <class T> inline constexpr bool is_pod_v 289 = is_pod<T>::value; // C++17 290 template <class T> inline constexpr bool is_literal_type_v 291 = is_literal_type<T>::value; // C++17 292 template <class T> inline constexpr bool is_empty_v 293 = is_empty<T>::value; // C++17 294 template <class T> inline constexpr bool is_polymorphic_v 295 = is_polymorphic<T>::value; // C++17 296 template <class T> inline constexpr bool is_abstract_v 297 = is_abstract<T>::value; // C++17 298 template <class T> inline constexpr bool is_final_v 299 = is_final<T>::value; // C++17 300 template <class T> inline constexpr bool is_aggregate_v 301 = is_aggregate<T>::value; // C++17 302 template <class T> inline constexpr bool is_signed_v 303 = is_signed<T>::value; // C++17 304 template <class T> inline constexpr bool is_unsigned_v 305 = is_unsigned<T>::value; // C++17 306 template <class T, class... Args> inline constexpr bool is_constructible_v 307 = is_constructible<T, Args...>::value; // C++17 308 template <class T> inline constexpr bool is_default_constructible_v 309 = is_default_constructible<T>::value; // C++17 310 template <class T> inline constexpr bool is_copy_constructible_v 311 = is_copy_constructible<T>::value; // C++17 312 template <class T> inline constexpr bool is_move_constructible_v 313 = is_move_constructible<T>::value; // C++17 314 template <class T, class U> inline constexpr bool is_assignable_v 315 = is_assignable<T, U>::value; // C++17 316 template <class T> inline constexpr bool is_copy_assignable_v 317 = is_copy_assignable<T>::value; // C++17 318 template <class T> inline constexpr bool is_move_assignable_v 319 = is_move_assignable<T>::value; // C++17 320 template <class T, class U> inline constexpr bool is_swappable_with_v 321 = is_swappable_with<T, U>::value; // C++17 322 template <class T> inline constexpr bool is_swappable_v 323 = is_swappable<T>::value; // C++17 324 template <class T> inline constexpr bool is_destructible_v 325 = is_destructible<T>::value; // C++17 326 template <class T, class... Args> inline constexpr bool is_trivially_constructible_v 327 = is_trivially_constructible<T, Args...>::value; // C++17 328 template <class T> inline constexpr bool is_trivially_default_constructible_v 329 = is_trivially_default_constructible<T>::value; // C++17 330 template <class T> inline constexpr bool is_trivially_copy_constructible_v 331 = is_trivially_copy_constructible<T>::value; // C++17 332 template <class T> inline constexpr bool is_trivially_move_constructible_v 333 = is_trivially_move_constructible<T>::value; // C++17 334 template <class T, class U> inline constexpr bool is_trivially_assignable_v 335 = is_trivially_assignable<T, U>::value; // C++17 336 template <class T> inline constexpr bool is_trivially_copy_assignable_v 337 = is_trivially_copy_assignable<T>::value; // C++17 338 template <class T> inline constexpr bool is_trivially_move_assignable_v 339 = is_trivially_move_assignable<T>::value; // C++17 340 template <class T> inline constexpr bool is_trivially_destructible_v 341 = is_trivially_destructible<T>::value; // C++17 342 template <class T, class... Args> inline constexpr bool is_nothrow_constructible_v 343 = is_nothrow_constructible<T, Args...>::value; // C++17 344 template <class T> inline constexpr bool is_nothrow_default_constructible_v 345 = is_nothrow_default_constructible<T>::value; // C++17 346 template <class T> inline constexpr bool is_nothrow_copy_constructible_v 347 = is_nothrow_copy_constructible<T>::value; // C++17 348 template <class T> inline constexpr bool is_nothrow_move_constructible_v 349 = is_nothrow_move_constructible<T>::value; // C++17 350 template <class T, class U> inline constexpr bool is_nothrow_assignable_v 351 = is_nothrow_assignable<T, U>::value; // C++17 352 template <class T> inline constexpr bool is_nothrow_copy_assignable_v 353 = is_nothrow_copy_assignable<T>::value; // C++17 354 template <class T> inline constexpr bool is_nothrow_move_assignable_v 355 = is_nothrow_move_assignable<T>::value; // C++17 356 template <class T, class U> inline constexpr bool is_nothrow_swappable_with_v 357 = is_nothrow_swappable_with<T, U>::value; // C++17 358 template <class T> inline constexpr bool is_nothrow_swappable_v 359 = is_nothrow_swappable<T>::value; // C++17 360 template <class T> inline constexpr bool is_nothrow_destructible_v 361 = is_nothrow_destructible<T>::value; // C++17 362 template <class T> inline constexpr bool has_virtual_destructor_v 363 = has_virtual_destructor<T>::value; // C++17 364 template<class T> inline constexpr bool has_unique_object_representations_v // C++17 365 = has_unique_object_representations<T>::value; 366 367 // See C++14 20.10.5, type property queries 368 template <class T> inline constexpr size_t alignment_of_v 369 = alignment_of<T>::value; // C++17 370 template <class T> inline constexpr size_t rank_v 371 = rank<T>::value; // C++17 372 template <class T, unsigned I = 0> inline constexpr size_t extent_v 373 = extent<T, I>::value; // C++17 374 375 // See C++14 20.10.6, type relations 376 template <class T, class U> inline constexpr bool is_same_v 377 = is_same<T, U>::value; // C++17 378 template <class Base, class Derived> inline constexpr bool is_base_of_v 379 = is_base_of<Base, Derived>::value; // C++17 380 template <class From, class To> inline constexpr bool is_convertible_v 381 = is_convertible<From, To>::value; // C++17 382 template <class Fn, class... ArgTypes> inline constexpr bool is_invocable_v 383 = is_invocable<Fn, ArgTypes...>::value; // C++17 384 template <class R, class Fn, class... ArgTypes> inline constexpr bool is_invocable_r_v 385 = is_invocable_r<R, Fn, ArgTypes...>::value; // C++17 386 template <class Fn, class... ArgTypes> inline constexpr bool is_nothrow_invocable_v 387 = is_nothrow_invocable<Fn, ArgTypes...>::value; // C++17 388 template <class R, class Fn, class... ArgTypes> inline constexpr bool is_nothrow_invocable_r_v 389 = is_nothrow_invocable_r<R, Fn, ArgTypes...>::value; // C++17 390 391 // [meta.logical], logical operator traits: 392 template<class... B> struct conjunction; // C++17 393 template<class... B> 394 inline constexpr bool conjunction_v = conjunction<B...>::value; // C++17 395 template<class... B> struct disjunction; // C++17 396 template<class... B> 397 inline constexpr bool disjunction_v = disjunction<B...>::value; // C++17 398 template<class B> struct negation; // C++17 399 template<class B> 400 inline constexpr bool negation_v = negation<B>::value; // C++17 401 402} 403 404*/ 405#include <__config> 406#include <cstddef> 407#include <version> 408 409#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 410#pragma GCC system_header 411#endif 412 413_LIBCPP_BEGIN_NAMESPACE_STD 414 415template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS pair; 416template <class _Tp> class _LIBCPP_TEMPLATE_VIS reference_wrapper; 417template <class _Tp> struct _LIBCPP_TEMPLATE_VIS hash; 418 419template <class> 420struct __void_t { typedef void type; }; 421 422template <class _Tp> 423struct __identity { typedef _Tp type; }; 424 425template <class _Tp, bool> 426struct _LIBCPP_TEMPLATE_VIS __dependent_type : public _Tp {}; 427 428template <bool _Bp, class _If, class _Then> 429 struct _LIBCPP_TEMPLATE_VIS conditional {typedef _If type;}; 430template <class _If, class _Then> 431 struct _LIBCPP_TEMPLATE_VIS conditional<false, _If, _Then> {typedef _Then type;}; 432 433#if _LIBCPP_STD_VER > 11 434template <bool _Bp, class _If, class _Then> using conditional_t = typename conditional<_Bp, _If, _Then>::type; 435#endif 436 437template <bool, class _Tp> struct _LIBCPP_TEMPLATE_VIS __lazy_enable_if {}; 438template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __lazy_enable_if<true, _Tp> {typedef typename _Tp::type type;}; 439 440template <bool, class _Tp = void> struct _LIBCPP_TEMPLATE_VIS enable_if {}; 441template <class _Tp> struct _LIBCPP_TEMPLATE_VIS enable_if<true, _Tp> {typedef _Tp type;}; 442 443#if _LIBCPP_STD_VER > 11 444template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp, _Tp>::type; 445#endif 446 447// addressof 448#ifndef _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF 449 450template <class _Tp> 451inline _LIBCPP_CONSTEXPR_AFTER_CXX14 452_LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY 453_Tp* 454addressof(_Tp& __x) _NOEXCEPT 455{ 456 return __builtin_addressof(__x); 457} 458 459#else 460 461template <class _Tp> 462inline _LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY 463_Tp* 464addressof(_Tp& __x) _NOEXCEPT 465{ 466 return reinterpret_cast<_Tp *>( 467 const_cast<char *>(&reinterpret_cast<const volatile char &>(__x))); 468} 469 470#endif // _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF 471 472#if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF) 473// Objective-C++ Automatic Reference Counting uses qualified pointers 474// that require special addressof() signatures. When 475// _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler 476// itself is providing these definitions. Otherwise, we provide them. 477template <class _Tp> 478inline _LIBCPP_INLINE_VISIBILITY 479__strong _Tp* 480addressof(__strong _Tp& __x) _NOEXCEPT 481{ 482 return &__x; 483} 484 485#ifdef _LIBCPP_HAS_OBJC_ARC_WEAK 486template <class _Tp> 487inline _LIBCPP_INLINE_VISIBILITY 488__weak _Tp* 489addressof(__weak _Tp& __x) _NOEXCEPT 490{ 491 return &__x; 492} 493#endif 494 495template <class _Tp> 496inline _LIBCPP_INLINE_VISIBILITY 497__autoreleasing _Tp* 498addressof(__autoreleasing _Tp& __x) _NOEXCEPT 499{ 500 return &__x; 501} 502 503template <class _Tp> 504inline _LIBCPP_INLINE_VISIBILITY 505__unsafe_unretained _Tp* 506addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT 507{ 508 return &__x; 509} 510#endif 511 512#if !defined(_LIBCPP_CXX03_LANG) 513template <class _Tp> _Tp* addressof(const _Tp&&) noexcept = delete; 514#endif 515 516struct __two {char __lx[2];}; 517 518// helper class: 519 520template <class _Tp, _Tp __v> 521struct _LIBCPP_TEMPLATE_VIS integral_constant 522{ 523 static _LIBCPP_CONSTEXPR const _Tp value = __v; 524 typedef _Tp value_type; 525 typedef integral_constant type; 526 _LIBCPP_INLINE_VISIBILITY 527 _LIBCPP_CONSTEXPR operator value_type() const _NOEXCEPT {return value;} 528#if _LIBCPP_STD_VER > 11 529 _LIBCPP_INLINE_VISIBILITY 530 constexpr value_type operator ()() const _NOEXCEPT {return value;} 531#endif 532}; 533 534template <class _Tp, _Tp __v> 535_LIBCPP_CONSTEXPR const _Tp integral_constant<_Tp, __v>::value; 536 537#if _LIBCPP_STD_VER > 14 538template <bool __b> 539using bool_constant = integral_constant<bool, __b>; 540#define _LIBCPP_BOOL_CONSTANT(__b) bool_constant<(__b)> 541#else 542#define _LIBCPP_BOOL_CONSTANT(__b) integral_constant<bool,(__b)> 543#endif 544 545typedef _LIBCPP_BOOL_CONSTANT(true) true_type; 546typedef _LIBCPP_BOOL_CONSTANT(false) false_type; 547 548#if !defined(_LIBCPP_CXX03_LANG) 549 550// __lazy_and 551 552template <bool _Last, class ..._Preds> 553struct __lazy_and_impl; 554 555template <class ..._Preds> 556struct __lazy_and_impl<false, _Preds...> : false_type {}; 557 558template <> 559struct __lazy_and_impl<true> : true_type {}; 560 561template <class _Pred> 562struct __lazy_and_impl<true, _Pred> : integral_constant<bool, _Pred::type::value> {}; 563 564template <class _Hp, class ..._Tp> 565struct __lazy_and_impl<true, _Hp, _Tp...> : __lazy_and_impl<_Hp::type::value, _Tp...> {}; 566 567template <class _P1, class ..._Pr> 568struct __lazy_and : __lazy_and_impl<_P1::type::value, _Pr...> {}; 569 570// __lazy_or 571 572template <bool _List, class ..._Preds> 573struct __lazy_or_impl; 574 575template <class ..._Preds> 576struct __lazy_or_impl<true, _Preds...> : true_type {}; 577 578template <> 579struct __lazy_or_impl<false> : false_type {}; 580 581template <class _Hp, class ..._Tp> 582struct __lazy_or_impl<false, _Hp, _Tp...> 583 : __lazy_or_impl<_Hp::type::value, _Tp...> {}; 584 585template <class _P1, class ..._Pr> 586struct __lazy_or : __lazy_or_impl<_P1::type::value, _Pr...> {}; 587 588// __lazy_not 589 590template <class _Pred> 591struct __lazy_not : integral_constant<bool, !_Pred::type::value> {}; 592 593// __and_ 594template<class...> struct __and_; 595template<> struct __and_<> : true_type {}; 596 597template<class _B0> struct __and_<_B0> : _B0 {}; 598 599template<class _B0, class _B1> 600struct __and_<_B0, _B1> : conditional<_B0::value, _B1, _B0>::type {}; 601 602template<class _B0, class _B1, class _B2, class... _Bn> 603struct __and_<_B0, _B1, _B2, _Bn...> 604 : conditional<_B0::value, __and_<_B1, _B2, _Bn...>, _B0>::type {}; 605 606// __or_ 607template<class...> struct __or_; 608template<> struct __or_<> : false_type {}; 609 610template<class _B0> struct __or_<_B0> : _B0 {}; 611 612template<class _B0, class _B1> 613struct __or_<_B0, _B1> : conditional<_B0::value, _B0, _B1>::type {}; 614 615template<class _B0, class _B1, class _B2, class... _Bn> 616struct __or_<_B0, _B1, _B2, _Bn...> 617 : conditional<_B0::value, _B0, __or_<_B1, _B2, _Bn...> >::type {}; 618 619// __not_ 620template<class _Tp> 621struct __not_ : conditional<_Tp::value, false_type, true_type>::type {}; 622 623#endif // !defined(_LIBCPP_CXX03_LANG) 624 625// is_const 626 627template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const : public false_type {}; 628template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_const<_Tp const> : public true_type {}; 629 630#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 631template <class _Tp> 632_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_const_v 633 = is_const<_Tp>::value; 634#endif 635 636// is_volatile 637 638template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile : public false_type {}; 639template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_volatile<_Tp volatile> : public true_type {}; 640 641#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 642template <class _Tp> 643_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_volatile_v 644 = is_volatile<_Tp>::value; 645#endif 646 647// remove_const 648 649template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const {typedef _Tp type;}; 650template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const<const _Tp> {typedef _Tp type;}; 651#if _LIBCPP_STD_VER > 11 652template <class _Tp> using remove_const_t = typename remove_const<_Tp>::type; 653#endif 654 655// remove_volatile 656 657template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile {typedef _Tp type;}; 658template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile<volatile _Tp> {typedef _Tp type;}; 659#if _LIBCPP_STD_VER > 11 660template <class _Tp> using remove_volatile_t = typename remove_volatile<_Tp>::type; 661#endif 662 663// remove_cv 664 665template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_cv 666{typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;}; 667#if _LIBCPP_STD_VER > 11 668template <class _Tp> using remove_cv_t = typename remove_cv<_Tp>::type; 669#endif 670 671// is_void 672 673template <class _Tp> struct __libcpp_is_void : public false_type {}; 674template <> struct __libcpp_is_void<void> : public true_type {}; 675 676template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_void 677 : public __libcpp_is_void<typename remove_cv<_Tp>::type> {}; 678 679#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 680template <class _Tp> 681_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_void_v 682 = is_void<_Tp>::value; 683#endif 684 685// __is_nullptr_t 686 687template <class _Tp> struct __is_nullptr_t_impl : public false_type {}; 688template <> struct __is_nullptr_t_impl<nullptr_t> : public true_type {}; 689 690template <class _Tp> struct _LIBCPP_TEMPLATE_VIS __is_nullptr_t 691 : public __is_nullptr_t_impl<typename remove_cv<_Tp>::type> {}; 692 693#if _LIBCPP_STD_VER > 11 694template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_null_pointer 695 : public __is_nullptr_t_impl<typename remove_cv<_Tp>::type> {}; 696 697#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 698template <class _Tp> 699_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_null_pointer_v 700 = is_null_pointer<_Tp>::value; 701#endif 702#endif 703 704// is_integral 705 706template <class _Tp> struct __libcpp_is_integral : public false_type {}; 707template <> struct __libcpp_is_integral<bool> : public true_type {}; 708template <> struct __libcpp_is_integral<char> : public true_type {}; 709template <> struct __libcpp_is_integral<signed char> : public true_type {}; 710template <> struct __libcpp_is_integral<unsigned char> : public true_type {}; 711template <> struct __libcpp_is_integral<wchar_t> : public true_type {}; 712#ifndef _LIBCPP_NO_HAS_CHAR8_T 713template <> struct __libcpp_is_integral<char8_t> : public true_type {}; 714#endif 715#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 716template <> struct __libcpp_is_integral<char16_t> : public true_type {}; 717template <> struct __libcpp_is_integral<char32_t> : public true_type {}; 718#endif // _LIBCPP_HAS_NO_UNICODE_CHARS 719template <> struct __libcpp_is_integral<short> : public true_type {}; 720template <> struct __libcpp_is_integral<unsigned short> : public true_type {}; 721template <> struct __libcpp_is_integral<int> : public true_type {}; 722template <> struct __libcpp_is_integral<unsigned int> : public true_type {}; 723template <> struct __libcpp_is_integral<long> : public true_type {}; 724template <> struct __libcpp_is_integral<unsigned long> : public true_type {}; 725template <> struct __libcpp_is_integral<long long> : public true_type {}; 726template <> struct __libcpp_is_integral<unsigned long long> : public true_type {}; 727#ifndef _LIBCPP_HAS_NO_INT128 728template <> struct __libcpp_is_integral<__int128_t> : public true_type {}; 729template <> struct __libcpp_is_integral<__uint128_t> : public true_type {}; 730#endif 731 732template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_integral 733 : public __libcpp_is_integral<typename remove_cv<_Tp>::type> {}; 734 735#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 736template <class _Tp> 737_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_integral_v 738 = is_integral<_Tp>::value; 739#endif 740 741// is_floating_point 742 743template <class _Tp> struct __libcpp_is_floating_point : public false_type {}; 744template <> struct __libcpp_is_floating_point<float> : public true_type {}; 745template <> struct __libcpp_is_floating_point<double> : public true_type {}; 746template <> struct __libcpp_is_floating_point<long double> : public true_type {}; 747 748template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_floating_point 749 : public __libcpp_is_floating_point<typename remove_cv<_Tp>::type> {}; 750 751#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 752template <class _Tp> 753_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_floating_point_v 754 = is_floating_point<_Tp>::value; 755#endif 756 757// is_array 758 759template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_array 760 : public false_type {}; 761template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[]> 762 : public true_type {}; 763template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS is_array<_Tp[_Np]> 764 : public true_type {}; 765 766#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 767template <class _Tp> 768_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_array_v 769 = is_array<_Tp>::value; 770#endif 771 772// is_pointer 773 774template <class _Tp> struct __libcpp_is_pointer : public false_type {}; 775template <class _Tp> struct __libcpp_is_pointer<_Tp*> : public true_type {}; 776 777template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pointer 778 : public __libcpp_is_pointer<typename remove_cv<_Tp>::type> {}; 779 780#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 781template <class _Tp> 782_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pointer_v 783 = is_pointer<_Tp>::value; 784#endif 785 786// is_reference 787 788template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference : public false_type {}; 789template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_lvalue_reference<_Tp&> : public true_type {}; 790 791template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference : public false_type {}; 792#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 793template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_rvalue_reference<_Tp&&> : public true_type {}; 794#endif 795 796template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference : public false_type {}; 797template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&> : public true_type {}; 798#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 799template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_reference<_Tp&&> : public true_type {}; 800#endif 801 802#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 803template <class _Tp> 804_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_reference_v 805 = is_reference<_Tp>::value; 806 807template <class _Tp> 808_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_lvalue_reference_v 809 = is_lvalue_reference<_Tp>::value; 810 811template <class _Tp> 812_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_rvalue_reference_v 813 = is_rvalue_reference<_Tp>::value; 814#endif 815// is_union 816 817#if __has_feature(is_union) || (_GNUC_VER >= 403) 818 819template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union 820 : public integral_constant<bool, __is_union(_Tp)> {}; 821 822#else 823 824template <class _Tp> struct __libcpp_union : public false_type {}; 825template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_union 826 : public __libcpp_union<typename remove_cv<_Tp>::type> {}; 827 828#endif 829 830#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 831template <class _Tp> 832_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_union_v 833 = is_union<_Tp>::value; 834#endif 835 836// is_class 837 838#if __has_feature(is_class) || (_GNUC_VER >= 403) 839 840template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class 841 : public integral_constant<bool, __is_class(_Tp)> {}; 842 843#else 844 845namespace __is_class_imp 846{ 847template <class _Tp> char __test(int _Tp::*); 848template <class _Tp> __two __test(...); 849} 850 851template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_class 852 : public integral_constant<bool, sizeof(__is_class_imp::__test<_Tp>(0)) == 1 && !is_union<_Tp>::value> {}; 853 854#endif 855 856#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 857template <class _Tp> 858_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_class_v 859 = is_class<_Tp>::value; 860#endif 861 862// is_same 863 864template <class _Tp, class _Up> struct _LIBCPP_TEMPLATE_VIS is_same : public false_type {}; 865template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_same<_Tp, _Tp> : public true_type {}; 866 867#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 868template <class _Tp, class _Up> 869_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_same_v 870 = is_same<_Tp, _Up>::value; 871#endif 872 873// is_function 874 875namespace __libcpp_is_function_imp 876{ 877struct __dummy_type {}; 878template <class _Tp> char __test(_Tp*); 879template <class _Tp> char __test(__dummy_type); 880template <class _Tp> __two __test(...); 881template <class _Tp> _Tp& __source(int); 882template <class _Tp> __dummy_type __source(...); 883} 884 885template <class _Tp, bool = is_class<_Tp>::value || 886 is_union<_Tp>::value || 887 is_void<_Tp>::value || 888 is_reference<_Tp>::value || 889 __is_nullptr_t<_Tp>::value > 890struct __libcpp_is_function 891 : public integral_constant<bool, sizeof(__libcpp_is_function_imp::__test<_Tp>(__libcpp_is_function_imp::__source<_Tp>(0))) == 1> 892 {}; 893template <class _Tp> struct __libcpp_is_function<_Tp, true> : public false_type {}; 894 895template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_function 896 : public __libcpp_is_function<_Tp> {}; 897 898#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 899template <class _Tp> 900_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_function_v 901 = is_function<_Tp>::value; 902#endif 903 904// is_member_function_pointer 905 906// template <class _Tp> struct __libcpp_is_member_function_pointer : public false_type {}; 907// template <class _Tp, class _Up> struct __libcpp_is_member_function_pointer<_Tp _Up::*> : public is_function<_Tp> {}; 908// 909 910template <class _MP, bool _IsMemberFunctionPtr, bool _IsMemberObjectPtr> 911struct __member_pointer_traits_imp 912{ // forward declaration; specializations later 913}; 914 915 916template <class _Tp> struct __libcpp_is_member_function_pointer 917 : public false_type {}; 918 919template <class _Ret, class _Class> 920struct __libcpp_is_member_function_pointer<_Ret _Class::*> 921 : public is_function<_Ret> {}; 922 923template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_function_pointer 924 : public __libcpp_is_member_function_pointer<typename remove_cv<_Tp>::type>::type {}; 925 926#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 927template <class _Tp> 928_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_function_pointer_v 929 = is_member_function_pointer<_Tp>::value; 930#endif 931 932// is_member_pointer 933 934template <class _Tp> struct __libcpp_is_member_pointer : public false_type {}; 935template <class _Tp, class _Up> struct __libcpp_is_member_pointer<_Tp _Up::*> : public true_type {}; 936 937template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_pointer 938 : public __libcpp_is_member_pointer<typename remove_cv<_Tp>::type> {}; 939 940#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 941template <class _Tp> 942_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_pointer_v 943 = is_member_pointer<_Tp>::value; 944#endif 945 946// is_member_object_pointer 947 948template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_member_object_pointer 949 : public integral_constant<bool, is_member_pointer<_Tp>::value && 950 !is_member_function_pointer<_Tp>::value> {}; 951 952#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 953template <class _Tp> 954_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_member_object_pointer_v 955 = is_member_object_pointer<_Tp>::value; 956#endif 957 958// is_enum 959 960#if __has_feature(is_enum) || (_GNUC_VER >= 403) 961 962template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum 963 : public integral_constant<bool, __is_enum(_Tp)> {}; 964 965#else 966 967template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_enum 968 : public integral_constant<bool, !is_void<_Tp>::value && 969 !is_integral<_Tp>::value && 970 !is_floating_point<_Tp>::value && 971 !is_array<_Tp>::value && 972 !is_pointer<_Tp>::value && 973 !is_reference<_Tp>::value && 974 !is_member_pointer<_Tp>::value && 975 !is_union<_Tp>::value && 976 !is_class<_Tp>::value && 977 !is_function<_Tp>::value > {}; 978 979#endif 980 981#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 982template <class _Tp> 983_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_enum_v 984 = is_enum<_Tp>::value; 985#endif 986 987// is_arithmetic 988 989template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_arithmetic 990 : public integral_constant<bool, is_integral<_Tp>::value || 991 is_floating_point<_Tp>::value> {}; 992 993#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 994template <class _Tp> 995_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_arithmetic_v 996 = is_arithmetic<_Tp>::value; 997#endif 998 999// is_fundamental 1000 1001template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_fundamental 1002 : public integral_constant<bool, is_void<_Tp>::value || 1003 __is_nullptr_t<_Tp>::value || 1004 is_arithmetic<_Tp>::value> {}; 1005 1006#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1007template <class _Tp> 1008_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_fundamental_v 1009 = is_fundamental<_Tp>::value; 1010#endif 1011 1012// is_scalar 1013 1014template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_scalar 1015 : public integral_constant<bool, is_arithmetic<_Tp>::value || 1016 is_member_pointer<_Tp>::value || 1017 is_pointer<_Tp>::value || 1018 __is_nullptr_t<_Tp>::value || 1019 is_enum<_Tp>::value > {}; 1020 1021template <> struct _LIBCPP_TEMPLATE_VIS is_scalar<nullptr_t> : public true_type {}; 1022 1023#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1024template <class _Tp> 1025_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_scalar_v 1026 = is_scalar<_Tp>::value; 1027#endif 1028 1029// is_object 1030 1031template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_object 1032 : public integral_constant<bool, is_scalar<_Tp>::value || 1033 is_array<_Tp>::value || 1034 is_union<_Tp>::value || 1035 is_class<_Tp>::value > {}; 1036 1037#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1038template <class _Tp> 1039_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_object_v 1040 = is_object<_Tp>::value; 1041#endif 1042 1043// is_compound 1044 1045template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_compound 1046 : public integral_constant<bool, !is_fundamental<_Tp>::value> {}; 1047 1048#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1049template <class _Tp> 1050_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_compound_v 1051 = is_compound<_Tp>::value; 1052#endif 1053 1054 1055// __is_referenceable [defns.referenceable] 1056 1057struct __is_referenceable_impl { 1058 template <class _Tp> static _Tp& __test(int); 1059 template <class _Tp> static __two __test(...); 1060}; 1061 1062template <class _Tp> 1063struct __is_referenceable : integral_constant<bool, 1064 !is_same<decltype(__is_referenceable_impl::__test<_Tp>(0)), __two>::value> {}; 1065 1066 1067// add_const 1068 1069template <class _Tp, bool = is_reference<_Tp>::value || 1070 is_function<_Tp>::value || 1071 is_const<_Tp>::value > 1072struct __add_const {typedef _Tp type;}; 1073 1074template <class _Tp> 1075struct __add_const<_Tp, false> {typedef const _Tp type;}; 1076 1077template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_const 1078 {typedef typename __add_const<_Tp>::type type;}; 1079 1080#if _LIBCPP_STD_VER > 11 1081template <class _Tp> using add_const_t = typename add_const<_Tp>::type; 1082#endif 1083 1084// add_volatile 1085 1086template <class _Tp, bool = is_reference<_Tp>::value || 1087 is_function<_Tp>::value || 1088 is_volatile<_Tp>::value > 1089struct __add_volatile {typedef _Tp type;}; 1090 1091template <class _Tp> 1092struct __add_volatile<_Tp, false> {typedef volatile _Tp type;}; 1093 1094template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_volatile 1095 {typedef typename __add_volatile<_Tp>::type type;}; 1096 1097#if _LIBCPP_STD_VER > 11 1098template <class _Tp> using add_volatile_t = typename add_volatile<_Tp>::type; 1099#endif 1100 1101// add_cv 1102 1103template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_cv 1104 {typedef typename add_const<typename add_volatile<_Tp>::type>::type type;}; 1105 1106#if _LIBCPP_STD_VER > 11 1107template <class _Tp> using add_cv_t = typename add_cv<_Tp>::type; 1108#endif 1109 1110// remove_reference 1111 1112template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference {typedef _Tp type;}; 1113template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&> {typedef _Tp type;}; 1114#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1115template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&&> {typedef _Tp type;}; 1116#endif 1117 1118#if _LIBCPP_STD_VER > 11 1119template <class _Tp> using remove_reference_t = typename remove_reference<_Tp>::type; 1120#endif 1121 1122// add_lvalue_reference 1123 1124template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_lvalue_reference_impl { typedef _Tp type; }; 1125template <class _Tp > struct __add_lvalue_reference_impl<_Tp, true> { typedef _Tp& type; }; 1126 1127template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_lvalue_reference 1128{typedef typename __add_lvalue_reference_impl<_Tp>::type type;}; 1129 1130#if _LIBCPP_STD_VER > 11 1131template <class _Tp> using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type; 1132#endif 1133 1134#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1135 1136template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_rvalue_reference_impl { typedef _Tp type; }; 1137template <class _Tp > struct __add_rvalue_reference_impl<_Tp, true> { typedef _Tp&& type; }; 1138 1139template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_rvalue_reference 1140{typedef typename __add_rvalue_reference_impl<_Tp>::type type;}; 1141 1142#if _LIBCPP_STD_VER > 11 1143template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type; 1144#endif 1145 1146#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1147 1148#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1149 1150template <class _Tp> _Tp&& __declval(int); 1151template <class _Tp> _Tp __declval(long); 1152 1153template <class _Tp> 1154decltype(_VSTD::__declval<_Tp>(0)) 1155declval() _NOEXCEPT; 1156 1157#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1158 1159template <class _Tp> 1160typename add_lvalue_reference<_Tp>::type 1161declval(); 1162 1163#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1164 1165// __uncvref 1166 1167template <class _Tp> 1168struct __uncvref { 1169 typedef typename remove_cv<typename remove_reference<_Tp>::type>::type type; 1170}; 1171 1172template <class _Tp> 1173struct __unconstref { 1174 typedef typename remove_const<typename remove_reference<_Tp>::type>::type type; 1175}; 1176 1177#ifndef _LIBCPP_CXX03_LANG 1178template <class _Tp> 1179using __uncvref_t = typename __uncvref<_Tp>::type; 1180#endif 1181 1182// __is_same_uncvref 1183 1184template <class _Tp, class _Up> 1185struct __is_same_uncvref : is_same<typename __uncvref<_Tp>::type, 1186 typename __uncvref<_Up>::type> {}; 1187 1188#if _LIBCPP_STD_VER > 17 1189// remove_cvref - same as __uncvref 1190template <class _Tp> 1191struct remove_cvref : public __uncvref<_Tp> {}; 1192 1193template <class _Tp> using remove_cvref_t = typename remove_cvref<_Tp>::type; 1194#endif 1195 1196 1197struct __any 1198{ 1199 __any(...); 1200}; 1201 1202// remove_pointer 1203 1204template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer {typedef _Tp type;}; 1205template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*> {typedef _Tp type;}; 1206template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const> {typedef _Tp type;}; 1207template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile> {typedef _Tp type;}; 1208template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _Tp type;}; 1209 1210#if _LIBCPP_STD_VER > 11 1211template <class _Tp> using remove_pointer_t = typename remove_pointer<_Tp>::type; 1212#endif 1213 1214// add_pointer 1215 1216template <class _Tp, 1217 bool = __is_referenceable<_Tp>::value || 1218 is_same<typename remove_cv<_Tp>::type, void>::value> 1219struct __add_pointer_impl 1220 {typedef typename remove_reference<_Tp>::type* type;}; 1221template <class _Tp> struct __add_pointer_impl<_Tp, false> 1222 {typedef _Tp type;}; 1223 1224template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_pointer 1225 {typedef typename __add_pointer_impl<_Tp>::type type;}; 1226 1227#if _LIBCPP_STD_VER > 11 1228template <class _Tp> using add_pointer_t = typename add_pointer<_Tp>::type; 1229#endif 1230 1231// type_identity 1232#if _LIBCPP_STD_VER > 17 1233template<class _Tp> struct type_identity { typedef _Tp type; }; 1234template<class _Tp> using type_identity_t = typename type_identity<_Tp>::type; 1235#endif 1236 1237// is_signed 1238 1239template <class _Tp, bool = is_integral<_Tp>::value> 1240struct __libcpp_is_signed_impl : public _LIBCPP_BOOL_CONSTANT(_Tp(-1) < _Tp(0)) {}; 1241 1242template <class _Tp> 1243struct __libcpp_is_signed_impl<_Tp, false> : public true_type {}; // floating point 1244 1245template <class _Tp, bool = is_arithmetic<_Tp>::value> 1246struct __libcpp_is_signed : public __libcpp_is_signed_impl<_Tp> {}; 1247 1248template <class _Tp> struct __libcpp_is_signed<_Tp, false> : public false_type {}; 1249 1250template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_signed : public __libcpp_is_signed<_Tp> {}; 1251 1252#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1253template <class _Tp> 1254_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_signed_v 1255 = is_signed<_Tp>::value; 1256#endif 1257 1258// is_unsigned 1259 1260template <class _Tp, bool = is_integral<_Tp>::value> 1261struct __libcpp_is_unsigned_impl : public _LIBCPP_BOOL_CONSTANT(_Tp(0) < _Tp(-1)) {}; 1262 1263template <class _Tp> 1264struct __libcpp_is_unsigned_impl<_Tp, false> : public false_type {}; // floating point 1265 1266template <class _Tp, bool = is_arithmetic<_Tp>::value> 1267struct __libcpp_is_unsigned : public __libcpp_is_unsigned_impl<_Tp> {}; 1268 1269template <class _Tp> struct __libcpp_is_unsigned<_Tp, false> : public false_type {}; 1270 1271template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_unsigned : public __libcpp_is_unsigned<_Tp> {}; 1272 1273#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1274template <class _Tp> 1275_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_unsigned_v 1276 = is_unsigned<_Tp>::value; 1277#endif 1278 1279// rank 1280 1281template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank 1282 : public integral_constant<size_t, 0> {}; 1283template <class _Tp> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[]> 1284 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 1285template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS rank<_Tp[_Np]> 1286 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 1287 1288#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1289template <class _Tp> 1290_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t rank_v 1291 = rank<_Tp>::value; 1292#endif 1293 1294// extent 1295 1296template <class _Tp, unsigned _Ip = 0> struct _LIBCPP_TEMPLATE_VIS extent 1297 : public integral_constant<size_t, 0> {}; 1298template <class _Tp> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[], 0> 1299 : public integral_constant<size_t, 0> {}; 1300template <class _Tp, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[], _Ip> 1301 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 1302template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], 0> 1303 : public integral_constant<size_t, _Np> {}; 1304template <class _Tp, size_t _Np, unsigned _Ip> struct _LIBCPP_TEMPLATE_VIS extent<_Tp[_Np], _Ip> 1305 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 1306 1307#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1308template <class _Tp, unsigned _Ip = 0> 1309_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t extent_v 1310 = extent<_Tp, _Ip>::value; 1311#endif 1312 1313// remove_extent 1314 1315template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent 1316 {typedef _Tp type;}; 1317template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[]> 1318 {typedef _Tp type;}; 1319template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[_Np]> 1320 {typedef _Tp type;}; 1321 1322#if _LIBCPP_STD_VER > 11 1323template <class _Tp> using remove_extent_t = typename remove_extent<_Tp>::type; 1324#endif 1325 1326// remove_all_extents 1327 1328template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents 1329 {typedef _Tp type;}; 1330template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[]> 1331 {typedef typename remove_all_extents<_Tp>::type type;}; 1332template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[_Np]> 1333 {typedef typename remove_all_extents<_Tp>::type type;}; 1334 1335#if _LIBCPP_STD_VER > 11 1336template <class _Tp> using remove_all_extents_t = typename remove_all_extents<_Tp>::type; 1337#endif 1338 1339// decay 1340 1341template <class _Up, bool> 1342struct __decay { 1343 typedef typename remove_cv<_Up>::type type; 1344}; 1345 1346template <class _Up> 1347struct __decay<_Up, true> { 1348public: 1349 typedef typename conditional 1350 < 1351 is_array<_Up>::value, 1352 typename remove_extent<_Up>::type*, 1353 typename conditional 1354 < 1355 is_function<_Up>::value, 1356 typename add_pointer<_Up>::type, 1357 typename remove_cv<_Up>::type 1358 >::type 1359 >::type type; 1360}; 1361 1362template <class _Tp> 1363struct _LIBCPP_TEMPLATE_VIS decay 1364{ 1365private: 1366 typedef typename remove_reference<_Tp>::type _Up; 1367public: 1368 typedef typename __decay<_Up, __is_referenceable<_Up>::value>::type type; 1369}; 1370 1371#if _LIBCPP_STD_VER > 11 1372template <class _Tp> using decay_t = typename decay<_Tp>::type; 1373#endif 1374 1375// is_abstract 1376 1377template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_abstract 1378 : public integral_constant<bool, __is_abstract(_Tp)> {}; 1379 1380#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1381template <class _Tp> 1382_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_abstract_v 1383 = is_abstract<_Tp>::value; 1384#endif 1385 1386// is_final 1387 1388#if defined(_LIBCPP_HAS_IS_FINAL) 1389template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1390__libcpp_is_final : public integral_constant<bool, __is_final(_Tp)> {}; 1391#else 1392template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1393__libcpp_is_final : public false_type {}; 1394#endif 1395 1396#if defined(_LIBCPP_HAS_IS_FINAL) && _LIBCPP_STD_VER > 11 1397template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1398is_final : public integral_constant<bool, __is_final(_Tp)> {}; 1399#endif 1400 1401#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1402template <class _Tp> 1403_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_final_v 1404 = is_final<_Tp>::value; 1405#endif 1406 1407// is_aggregate 1408#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_IS_AGGREGATE) 1409 1410template <class _Tp> struct _LIBCPP_TEMPLATE_VIS 1411is_aggregate : public integral_constant<bool, __is_aggregate(_Tp)> {}; 1412 1413#if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1414template <class _Tp> 1415_LIBCPP_INLINE_VAR constexpr bool is_aggregate_v 1416 = is_aggregate<_Tp>::value; 1417#endif 1418 1419#endif // _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_IS_AGGREGATE) 1420 1421// is_base_of 1422 1423#ifdef _LIBCPP_HAS_IS_BASE_OF 1424 1425template <class _Bp, class _Dp> 1426struct _LIBCPP_TEMPLATE_VIS is_base_of 1427 : public integral_constant<bool, __is_base_of(_Bp, _Dp)> {}; 1428 1429#else // _LIBCPP_HAS_IS_BASE_OF 1430 1431namespace __is_base_of_imp 1432{ 1433template <class _Tp> 1434struct _Dst 1435{ 1436 _Dst(const volatile _Tp &); 1437}; 1438template <class _Tp> 1439struct _Src 1440{ 1441 operator const volatile _Tp &(); 1442 template <class _Up> operator const _Dst<_Up> &(); 1443}; 1444template <size_t> struct __one { typedef char type; }; 1445template <class _Bp, class _Dp> typename __one<sizeof(_Dst<_Bp>(declval<_Src<_Dp> >()))>::type __test(int); 1446template <class _Bp, class _Dp> __two __test(...); 1447} 1448 1449template <class _Bp, class _Dp> 1450struct _LIBCPP_TEMPLATE_VIS is_base_of 1451 : public integral_constant<bool, is_class<_Bp>::value && 1452 sizeof(__is_base_of_imp::__test<_Bp, _Dp>(0)) == 2> {}; 1453 1454#endif // _LIBCPP_HAS_IS_BASE_OF 1455 1456#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1457template <class _Bp, class _Dp> 1458_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_base_of_v 1459 = is_base_of<_Bp, _Dp>::value; 1460#endif 1461 1462// is_convertible 1463 1464#if __has_feature(is_convertible_to) && !defined(_LIBCPP_USE_IS_CONVERTIBLE_FALLBACK) 1465 1466template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS is_convertible 1467 : public integral_constant<bool, __is_convertible_to(_T1, _T2) && 1468 !is_abstract<_T2>::value> {}; 1469 1470#else // __has_feature(is_convertible_to) 1471 1472namespace __is_convertible_imp 1473{ 1474template <class _Tp> void __test_convert(_Tp); 1475 1476template <class _From, class _To, class = void> 1477struct __is_convertible_test : public false_type {}; 1478 1479template <class _From, class _To> 1480struct __is_convertible_test<_From, _To, 1481 decltype(_VSTD::__is_convertible_imp::__test_convert<_To>(_VSTD::declval<_From>()))> : public true_type 1482{}; 1483 1484template <class _Tp, bool _IsArray = is_array<_Tp>::value, 1485 bool _IsFunction = is_function<_Tp>::value, 1486 bool _IsVoid = is_void<_Tp>::value> 1487 struct __is_array_function_or_void {enum {value = 0};}; 1488template <class _Tp> struct __is_array_function_or_void<_Tp, true, false, false> {enum {value = 1};}; 1489template <class _Tp> struct __is_array_function_or_void<_Tp, false, true, false> {enum {value = 2};}; 1490template <class _Tp> struct __is_array_function_or_void<_Tp, false, false, true> {enum {value = 3};}; 1491} 1492 1493template <class _Tp, 1494 unsigned = __is_convertible_imp::__is_array_function_or_void<typename remove_reference<_Tp>::type>::value> 1495struct __is_convertible_check 1496{ 1497 static const size_t __v = 0; 1498}; 1499 1500template <class _Tp> 1501struct __is_convertible_check<_Tp, 0> 1502{ 1503 static const size_t __v = sizeof(_Tp); 1504}; 1505 1506template <class _T1, class _T2, 1507 unsigned _T1_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T1>::value, 1508 unsigned _T2_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T2>::value> 1509struct __is_convertible 1510 : public integral_constant<bool, 1511 __is_convertible_imp::__is_convertible_test<_T1, _T2>::value 1512#if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1513 && !(!is_function<_T1>::value && !is_reference<_T1>::value && is_reference<_T2>::value 1514 && (!is_const<typename remove_reference<_T2>::type>::value 1515 || is_volatile<typename remove_reference<_T2>::type>::value) 1516 && (is_same<typename remove_cv<_T1>::type, 1517 typename remove_cv<typename remove_reference<_T2>::type>::type>::value 1518 || is_base_of<typename remove_reference<_T2>::type, _T1>::value)) 1519#endif 1520 > 1521{}; 1522 1523template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 1> : public false_type {}; 1524template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 1> : public false_type {}; 1525template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 1> : public false_type {}; 1526template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 1> : public false_type {}; 1527 1528template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 2> : public false_type {}; 1529template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 2> : public false_type {}; 1530template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 2> : public false_type {}; 1531template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 2> : public false_type {}; 1532 1533template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 3> : public false_type {}; 1534template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 3> : public false_type {}; 1535template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 3> : public false_type {}; 1536template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 3> : public true_type {}; 1537 1538template <class _T1, class _T2> struct _LIBCPP_TEMPLATE_VIS is_convertible 1539 : public __is_convertible<_T1, _T2> 1540{ 1541 static const size_t __complete_check1 = __is_convertible_check<_T1>::__v; 1542 static const size_t __complete_check2 = __is_convertible_check<_T2>::__v; 1543}; 1544 1545#endif // __has_feature(is_convertible_to) 1546 1547#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1548template <class _From, class _To> 1549_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_convertible_v 1550 = is_convertible<_From, _To>::value; 1551#endif 1552 1553// is_empty 1554 1555#if __has_feature(is_empty) || (_GNUC_VER >= 407) 1556 1557template <class _Tp> 1558struct _LIBCPP_TEMPLATE_VIS is_empty 1559 : public integral_constant<bool, __is_empty(_Tp)> {}; 1560 1561#else // __has_feature(is_empty) 1562 1563template <class _Tp> 1564struct __is_empty1 1565 : public _Tp 1566{ 1567 double __lx; 1568}; 1569 1570struct __is_empty2 1571{ 1572 double __lx; 1573}; 1574 1575template <class _Tp, bool = is_class<_Tp>::value> 1576struct __libcpp_empty : public integral_constant<bool, sizeof(__is_empty1<_Tp>) == sizeof(__is_empty2)> {}; 1577 1578template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {}; 1579 1580template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_empty : public __libcpp_empty<_Tp> {}; 1581 1582#endif // __has_feature(is_empty) 1583 1584#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1585template <class _Tp> 1586_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_empty_v 1587 = is_empty<_Tp>::value; 1588#endif 1589 1590// is_polymorphic 1591 1592#if __has_feature(is_polymorphic) || defined(_LIBCPP_COMPILER_MSVC) 1593 1594template <class _Tp> 1595struct _LIBCPP_TEMPLATE_VIS is_polymorphic 1596 : public integral_constant<bool, __is_polymorphic(_Tp)> {}; 1597 1598#else 1599 1600template<typename _Tp> char &__is_polymorphic_impl( 1601 typename enable_if<sizeof((_Tp*)dynamic_cast<const volatile void*>(declval<_Tp*>())) != 0, 1602 int>::type); 1603template<typename _Tp> __two &__is_polymorphic_impl(...); 1604 1605template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_polymorphic 1606 : public integral_constant<bool, sizeof(__is_polymorphic_impl<_Tp>(0)) == 1> {}; 1607 1608#endif // __has_feature(is_polymorphic) 1609 1610#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1611template <class _Tp> 1612_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_polymorphic_v 1613 = is_polymorphic<_Tp>::value; 1614#endif 1615 1616// has_virtual_destructor 1617 1618#if __has_feature(has_virtual_destructor) || (_GNUC_VER >= 403) 1619 1620template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor 1621 : public integral_constant<bool, __has_virtual_destructor(_Tp)> {}; 1622 1623#else 1624 1625template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor 1626 : public false_type {}; 1627 1628#endif 1629 1630#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1631template <class _Tp> 1632_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool has_virtual_destructor_v 1633 = has_virtual_destructor<_Tp>::value; 1634#endif 1635 1636// has_unique_object_representations 1637 1638#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS) 1639 1640template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_unique_object_representations 1641 : public integral_constant<bool, 1642 __has_unique_object_representations(remove_cv_t<remove_all_extents_t<_Tp>>)> {}; 1643 1644#if !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1645template <class _Tp> 1646_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool has_unique_object_representations_v 1647 = has_unique_object_representations<_Tp>::value; 1648#endif 1649 1650#endif 1651 1652// alignment_of 1653 1654template <class _Tp> struct _LIBCPP_TEMPLATE_VIS alignment_of 1655 : public integral_constant<size_t, __alignof__(_Tp)> {}; 1656 1657#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 1658template <class _Tp> 1659_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR size_t alignment_of_v 1660 = alignment_of<_Tp>::value; 1661#endif 1662 1663// aligned_storage 1664 1665template <class _Hp, class _Tp> 1666struct __type_list 1667{ 1668 typedef _Hp _Head; 1669 typedef _Tp _Tail; 1670}; 1671 1672struct __nat 1673{ 1674#ifndef _LIBCPP_CXX03_LANG 1675 __nat() = delete; 1676 __nat(const __nat&) = delete; 1677 __nat& operator=(const __nat&) = delete; 1678 ~__nat() = delete; 1679#endif 1680}; 1681 1682template <class _Tp> 1683struct __align_type 1684{ 1685 static const size_t value = alignment_of<_Tp>::value; 1686 typedef _Tp type; 1687}; 1688 1689struct __struct_double {long double __lx;}; 1690struct __struct_double4 {double __lx[4];}; 1691 1692typedef 1693 __type_list<__align_type<unsigned char>, 1694 __type_list<__align_type<unsigned short>, 1695 __type_list<__align_type<unsigned int>, 1696 __type_list<__align_type<unsigned long>, 1697 __type_list<__align_type<unsigned long long>, 1698 __type_list<__align_type<double>, 1699 __type_list<__align_type<long double>, 1700 __type_list<__align_type<__struct_double>, 1701 __type_list<__align_type<__struct_double4>, 1702 __type_list<__align_type<int*>, 1703 __nat 1704 > > > > > > > > > > __all_types; 1705 1706template <class _TL, size_t _Align> struct __find_pod; 1707 1708template <class _Hp, size_t _Align> 1709struct __find_pod<__type_list<_Hp, __nat>, _Align> 1710{ 1711 typedef typename conditional< 1712 _Align == _Hp::value, 1713 typename _Hp::type, 1714 void 1715 >::type type; 1716}; 1717 1718template <class _Hp, class _Tp, size_t _Align> 1719struct __find_pod<__type_list<_Hp, _Tp>, _Align> 1720{ 1721 typedef typename conditional< 1722 _Align == _Hp::value, 1723 typename _Hp::type, 1724 typename __find_pod<_Tp, _Align>::type 1725 >::type type; 1726}; 1727 1728template <class _TL, size_t _Len> struct __find_max_align; 1729 1730template <class _Hp, size_t _Len> 1731struct __find_max_align<__type_list<_Hp, __nat>, _Len> : public integral_constant<size_t, _Hp::value> {}; 1732 1733template <size_t _Len, size_t _A1, size_t _A2> 1734struct __select_align 1735{ 1736private: 1737 static const size_t __min = _A2 < _A1 ? _A2 : _A1; 1738 static const size_t __max = _A1 < _A2 ? _A2 : _A1; 1739public: 1740 static const size_t value = _Len < __max ? __min : __max; 1741}; 1742 1743template <class _Hp, class _Tp, size_t _Len> 1744struct __find_max_align<__type_list<_Hp, _Tp>, _Len> 1745 : public integral_constant<size_t, __select_align<_Len, _Hp::value, __find_max_align<_Tp, _Len>::value>::value> {}; 1746 1747template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value> 1748struct _LIBCPP_TEMPLATE_VIS aligned_storage 1749{ 1750 typedef typename __find_pod<__all_types, _Align>::type _Aligner; 1751 static_assert(!is_void<_Aligner>::value, ""); 1752 union type 1753 { 1754 _Aligner __align; 1755 unsigned char __data[(_Len + _Align - 1)/_Align * _Align]; 1756 }; 1757}; 1758 1759#if _LIBCPP_STD_VER > 11 1760template <size_t _Len, size_t _Align = __find_max_align<__all_types, _Len>::value> 1761 using aligned_storage_t = typename aligned_storage<_Len, _Align>::type; 1762#endif 1763 1764#define _CREATE_ALIGNED_STORAGE_SPECIALIZATION(n) \ 1765template <size_t _Len>\ 1766struct _LIBCPP_TEMPLATE_VIS aligned_storage<_Len, n>\ 1767{\ 1768 struct _ALIGNAS(n) type\ 1769 {\ 1770 unsigned char __lx[(_Len + n - 1)/n * n];\ 1771 };\ 1772} 1773 1774_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1); 1775_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2); 1776_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4); 1777_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x8); 1778_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x10); 1779_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x20); 1780_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x40); 1781_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x80); 1782_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x100); 1783_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x200); 1784_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x400); 1785_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800); 1786_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000); 1787_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000); 1788// PE/COFF does not support alignment beyond 8192 (=0x2000) 1789#if !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1790_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000); 1791#endif // !defined(_LIBCPP_OBJECT_FORMAT_COFF) 1792 1793#undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION 1794 1795#ifndef _LIBCPP_HAS_NO_VARIADICS 1796 1797// aligned_union 1798 1799template <size_t _I0, size_t ..._In> 1800struct __static_max; 1801 1802template <size_t _I0> 1803struct __static_max<_I0> 1804{ 1805 static const size_t value = _I0; 1806}; 1807 1808template <size_t _I0, size_t _I1, size_t ..._In> 1809struct __static_max<_I0, _I1, _In...> 1810{ 1811 static const size_t value = _I0 >= _I1 ? __static_max<_I0, _In...>::value : 1812 __static_max<_I1, _In...>::value; 1813}; 1814 1815template <size_t _Len, class _Type0, class ..._Types> 1816struct aligned_union 1817{ 1818 static const size_t alignment_value = __static_max<__alignof__(_Type0), 1819 __alignof__(_Types)...>::value; 1820 static const size_t __len = __static_max<_Len, sizeof(_Type0), 1821 sizeof(_Types)...>::value; 1822 typedef typename aligned_storage<__len, alignment_value>::type type; 1823}; 1824 1825#if _LIBCPP_STD_VER > 11 1826template <size_t _Len, class ..._Types> using aligned_union_t = typename aligned_union<_Len, _Types...>::type; 1827#endif 1828 1829#endif // _LIBCPP_HAS_NO_VARIADICS 1830 1831template <class _Tp> 1832struct __numeric_type 1833{ 1834 static void __test(...); 1835 static float __test(float); 1836 static double __test(char); 1837 static double __test(int); 1838 static double __test(unsigned); 1839 static double __test(long); 1840 static double __test(unsigned long); 1841 static double __test(long long); 1842 static double __test(unsigned long long); 1843 static double __test(double); 1844 static long double __test(long double); 1845 1846 typedef decltype(__test(declval<_Tp>())) type; 1847 static const bool value = !is_same<type, void>::value; 1848}; 1849 1850template <> 1851struct __numeric_type<void> 1852{ 1853 static const bool value = true; 1854}; 1855 1856// __promote 1857 1858template <class _A1, class _A2 = void, class _A3 = void, 1859 bool = __numeric_type<_A1>::value && 1860 __numeric_type<_A2>::value && 1861 __numeric_type<_A3>::value> 1862class __promote_imp 1863{ 1864public: 1865 static const bool value = false; 1866}; 1867 1868template <class _A1, class _A2, class _A3> 1869class __promote_imp<_A1, _A2, _A3, true> 1870{ 1871private: 1872 typedef typename __promote_imp<_A1>::type __type1; 1873 typedef typename __promote_imp<_A2>::type __type2; 1874 typedef typename __promote_imp<_A3>::type __type3; 1875public: 1876 typedef decltype(__type1() + __type2() + __type3()) type; 1877 static const bool value = true; 1878}; 1879 1880template <class _A1, class _A2> 1881class __promote_imp<_A1, _A2, void, true> 1882{ 1883private: 1884 typedef typename __promote_imp<_A1>::type __type1; 1885 typedef typename __promote_imp<_A2>::type __type2; 1886public: 1887 typedef decltype(__type1() + __type2()) type; 1888 static const bool value = true; 1889}; 1890 1891template <class _A1> 1892class __promote_imp<_A1, void, void, true> 1893{ 1894public: 1895 typedef typename __numeric_type<_A1>::type type; 1896 static const bool value = true; 1897}; 1898 1899template <class _A1, class _A2 = void, class _A3 = void> 1900class __promote : public __promote_imp<_A1, _A2, _A3> {}; 1901 1902// make_signed / make_unsigned 1903 1904typedef 1905 __type_list<signed char, 1906 __type_list<signed short, 1907 __type_list<signed int, 1908 __type_list<signed long, 1909 __type_list<signed long long, 1910#ifndef _LIBCPP_HAS_NO_INT128 1911 __type_list<__int128_t, 1912#endif 1913 __nat 1914#ifndef _LIBCPP_HAS_NO_INT128 1915 > 1916#endif 1917 > > > > > __signed_types; 1918 1919typedef 1920 __type_list<unsigned char, 1921 __type_list<unsigned short, 1922 __type_list<unsigned int, 1923 __type_list<unsigned long, 1924 __type_list<unsigned long long, 1925#ifndef _LIBCPP_HAS_NO_INT128 1926 __type_list<__uint128_t, 1927#endif 1928 __nat 1929#ifndef _LIBCPP_HAS_NO_INT128 1930 > 1931#endif 1932 > > > > > __unsigned_types; 1933 1934template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> struct __find_first; 1935 1936template <class _Hp, class _Tp, size_t _Size> 1937struct __find_first<__type_list<_Hp, _Tp>, _Size, true> 1938{ 1939 typedef _Hp type; 1940}; 1941 1942template <class _Hp, class _Tp, size_t _Size> 1943struct __find_first<__type_list<_Hp, _Tp>, _Size, false> 1944{ 1945 typedef typename __find_first<_Tp, _Size>::type type; 1946}; 1947 1948template <class _Tp, class _Up, bool = is_const<typename remove_reference<_Tp>::type>::value, 1949 bool = is_volatile<typename remove_reference<_Tp>::type>::value> 1950struct __apply_cv 1951{ 1952 typedef _Up type; 1953}; 1954 1955template <class _Tp, class _Up> 1956struct __apply_cv<_Tp, _Up, true, false> 1957{ 1958 typedef const _Up type; 1959}; 1960 1961template <class _Tp, class _Up> 1962struct __apply_cv<_Tp, _Up, false, true> 1963{ 1964 typedef volatile _Up type; 1965}; 1966 1967template <class _Tp, class _Up> 1968struct __apply_cv<_Tp, _Up, true, true> 1969{ 1970 typedef const volatile _Up type; 1971}; 1972 1973template <class _Tp, class _Up> 1974struct __apply_cv<_Tp&, _Up, false, false> 1975{ 1976 typedef _Up& type; 1977}; 1978 1979template <class _Tp, class _Up> 1980struct __apply_cv<_Tp&, _Up, true, false> 1981{ 1982 typedef const _Up& type; 1983}; 1984 1985template <class _Tp, class _Up> 1986struct __apply_cv<_Tp&, _Up, false, true> 1987{ 1988 typedef volatile _Up& type; 1989}; 1990 1991template <class _Tp, class _Up> 1992struct __apply_cv<_Tp&, _Up, true, true> 1993{ 1994 typedef const volatile _Up& type; 1995}; 1996 1997template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 1998struct __make_signed {}; 1999 2000template <class _Tp> 2001struct __make_signed<_Tp, true> 2002{ 2003 typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; 2004}; 2005 2006template <> struct __make_signed<bool, true> {}; 2007template <> struct __make_signed< signed short, true> {typedef short type;}; 2008template <> struct __make_signed<unsigned short, true> {typedef short type;}; 2009template <> struct __make_signed< signed int, true> {typedef int type;}; 2010template <> struct __make_signed<unsigned int, true> {typedef int type;}; 2011template <> struct __make_signed< signed long, true> {typedef long type;}; 2012template <> struct __make_signed<unsigned long, true> {typedef long type;}; 2013template <> struct __make_signed< signed long long, true> {typedef long long type;}; 2014template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; 2015#ifndef _LIBCPP_HAS_NO_INT128 2016template <> struct __make_signed<__int128_t, true> {typedef __int128_t type;}; 2017template <> struct __make_signed<__uint128_t, true> {typedef __int128_t type;}; 2018#endif 2019 2020template <class _Tp> 2021struct _LIBCPP_TEMPLATE_VIS make_signed 2022{ 2023 typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; 2024}; 2025 2026#if _LIBCPP_STD_VER > 11 2027template <class _Tp> using make_signed_t = typename make_signed<_Tp>::type; 2028#endif 2029 2030template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 2031struct __make_unsigned {}; 2032 2033template <class _Tp> 2034struct __make_unsigned<_Tp, true> 2035{ 2036 typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type; 2037}; 2038 2039template <> struct __make_unsigned<bool, true> {}; 2040template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;}; 2041template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;}; 2042template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;}; 2043template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;}; 2044template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;}; 2045template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;}; 2046template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;}; 2047template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;}; 2048#ifndef _LIBCPP_HAS_NO_INT128 2049template <> struct __make_unsigned<__int128_t, true> {typedef __uint128_t type;}; 2050template <> struct __make_unsigned<__uint128_t, true> {typedef __uint128_t type;}; 2051#endif 2052 2053template <class _Tp> 2054struct _LIBCPP_TEMPLATE_VIS make_unsigned 2055{ 2056 typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type; 2057}; 2058 2059#if _LIBCPP_STD_VER > 11 2060template <class _Tp> using make_unsigned_t = typename make_unsigned<_Tp>::type; 2061#endif 2062 2063#ifdef _LIBCPP_HAS_NO_VARIADICS 2064 2065template <class _Tp, class _Up = void, class _Vp = void> 2066struct _LIBCPP_TEMPLATE_VIS common_type 2067{ 2068public: 2069 typedef typename common_type<typename common_type<_Tp, _Up>::type, _Vp>::type type; 2070}; 2071 2072template <> 2073struct _LIBCPP_TEMPLATE_VIS common_type<void, void, void> 2074{ 2075public: 2076 typedef void type; 2077}; 2078 2079template <class _Tp> 2080struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, void, void> 2081{ 2082public: 2083 typedef typename common_type<_Tp, _Tp>::type type; 2084}; 2085 2086template <class _Tp, class _Up> 2087struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, _Up, void> 2088{ 2089 typedef typename decay<decltype( 2090 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2091 )>::type type; 2092}; 2093 2094#else // _LIBCPP_HAS_NO_VARIADICS 2095 2096// bullet 1 - sizeof...(Tp) == 0 2097 2098template <class ..._Tp> 2099struct _LIBCPP_TEMPLATE_VIS common_type {}; 2100 2101// bullet 2 - sizeof...(Tp) == 1 2102 2103template <class _Tp> 2104struct _LIBCPP_TEMPLATE_VIS common_type<_Tp> 2105 : public common_type<_Tp, _Tp> {}; 2106 2107// bullet 3 - sizeof...(Tp) == 2 2108 2109template <class _Tp, class _Up, class = void> 2110struct __common_type2_imp {}; 2111 2112template <class _Tp, class _Up> 2113struct __common_type2_imp<_Tp, _Up, 2114 typename __void_t<decltype( 2115 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2116 )>::type> 2117{ 2118 typedef typename decay<decltype( 2119 true ? _VSTD::declval<_Tp>() : _VSTD::declval<_Up>() 2120 )>::type type; 2121}; 2122 2123template <class _Tp, class _Up, 2124 class _DTp = typename decay<_Tp>::type, 2125 class _DUp = typename decay<_Up>::type> 2126using __common_type2 = 2127 typename conditional< 2128 is_same<_Tp, _DTp>::value && is_same<_Up, _DUp>::value, 2129 __common_type2_imp<_Tp, _Up>, 2130 common_type<_DTp, _DUp> 2131 >::type; 2132 2133template <class _Tp, class _Up> 2134struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, _Up> 2135 : __common_type2<_Tp, _Up> {}; 2136 2137// bullet 4 - sizeof...(Tp) > 2 2138 2139template <class ...Tp> struct __common_types; 2140 2141template <class, class = void> 2142struct __common_type_impl {}; 2143 2144template <class _Tp, class _Up> 2145struct __common_type_impl< 2146 __common_types<_Tp, _Up>, 2147 typename __void_t<typename common_type<_Tp, _Up>::type>::type> 2148{ 2149 typedef typename common_type<_Tp, _Up>::type type; 2150}; 2151 2152template <class _Tp, class _Up, class ..._Vp> 2153struct __common_type_impl<__common_types<_Tp, _Up, _Vp...>, 2154 typename __void_t<typename common_type<_Tp, _Up>::type>::type> 2155 : __common_type_impl< 2156 __common_types<typename common_type<_Tp, _Up>::type, _Vp...> > 2157{ 2158 2159}; 2160 2161template <class _Tp, class _Up, class ..._Vp> 2162struct _LIBCPP_TEMPLATE_VIS common_type<_Tp, _Up, _Vp...> 2163 : __common_type_impl<__common_types<_Tp, _Up, _Vp...> > {}; 2164 2165#if _LIBCPP_STD_VER > 11 2166template <class ..._Tp> using common_type_t = typename common_type<_Tp...>::type; 2167#endif 2168 2169#endif // _LIBCPP_HAS_NO_VARIADICS 2170 2171// is_assignable 2172 2173template<typename, typename _Tp> struct __select_2nd { typedef _Tp type; }; 2174 2175template <class _Tp, class _Arg> 2176typename __select_2nd<decltype((_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>())), true_type>::type 2177__is_assignable_test(int); 2178 2179template <class, class> 2180false_type __is_assignable_test(...); 2181 2182 2183template <class _Tp, class _Arg, bool = is_void<_Tp>::value || is_void<_Arg>::value> 2184struct __is_assignable_imp 2185 : public decltype((_VSTD::__is_assignable_test<_Tp, _Arg>(0))) {}; 2186 2187template <class _Tp, class _Arg> 2188struct __is_assignable_imp<_Tp, _Arg, true> 2189 : public false_type 2190{ 2191}; 2192 2193template <class _Tp, class _Arg> 2194struct is_assignable 2195 : public __is_assignable_imp<_Tp, _Arg> {}; 2196 2197#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2198template <class _Tp, class _Arg> 2199_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_assignable_v 2200 = is_assignable<_Tp, _Arg>::value; 2201#endif 2202 2203// is_copy_assignable 2204 2205template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_copy_assignable 2206 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 2207 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 2208 2209#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2210template <class _Tp> 2211_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_assignable_v 2212 = is_copy_assignable<_Tp>::value; 2213#endif 2214 2215// is_move_assignable 2216 2217template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_move_assignable 2218#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2219 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 2220 typename add_rvalue_reference<_Tp>::type> {}; 2221#else 2222 : public is_copy_assignable<_Tp> {}; 2223#endif 2224 2225#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2226template <class _Tp> 2227_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_assignable_v 2228 = is_move_assignable<_Tp>::value; 2229#endif 2230 2231// is_destructible 2232 2233// if it's a reference, return true 2234// if it's a function, return false 2235// if it's void, return false 2236// if it's an array of unknown bound, return false 2237// Otherwise, return "std::declval<_Up&>().~_Up()" is well-formed 2238// where _Up is remove_all_extents<_Tp>::type 2239 2240template <class> 2241struct __is_destructible_apply { typedef int type; }; 2242 2243template <typename _Tp> 2244struct __is_destructor_wellformed { 2245 template <typename _Tp1> 2246 static char __test ( 2247 typename __is_destructible_apply<decltype(_VSTD::declval<_Tp1&>().~_Tp1())>::type 2248 ); 2249 2250 template <typename _Tp1> 2251 static __two __test (...); 2252 2253 static const bool value = sizeof(__test<_Tp>(12)) == sizeof(char); 2254}; 2255 2256template <class _Tp, bool> 2257struct __destructible_imp; 2258 2259template <class _Tp> 2260struct __destructible_imp<_Tp, false> 2261 : public _VSTD::integral_constant<bool, 2262 __is_destructor_wellformed<typename _VSTD::remove_all_extents<_Tp>::type>::value> {}; 2263 2264template <class _Tp> 2265struct __destructible_imp<_Tp, true> 2266 : public _VSTD::true_type {}; 2267 2268template <class _Tp, bool> 2269struct __destructible_false; 2270 2271template <class _Tp> 2272struct __destructible_false<_Tp, false> : public __destructible_imp<_Tp, _VSTD::is_reference<_Tp>::value> {}; 2273 2274template <class _Tp> 2275struct __destructible_false<_Tp, true> : public _VSTD::false_type {}; 2276 2277template <class _Tp> 2278struct is_destructible 2279 : public __destructible_false<_Tp, _VSTD::is_function<_Tp>::value> {}; 2280 2281template <class _Tp> 2282struct is_destructible<_Tp[]> 2283 : public _VSTD::false_type {}; 2284 2285template <> 2286struct is_destructible<void> 2287 : public _VSTD::false_type {}; 2288 2289#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 2290template <class _Tp> 2291_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_destructible_v 2292 = is_destructible<_Tp>::value; 2293#endif 2294 2295// move 2296 2297#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2298 2299template <class _Tp> 2300inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2301typename remove_reference<_Tp>::type&& 2302move(_Tp&& __t) _NOEXCEPT 2303{ 2304 typedef typename remove_reference<_Tp>::type _Up; 2305 return static_cast<_Up&&>(__t); 2306} 2307 2308template <class _Tp> 2309inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2310_Tp&& 2311forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT 2312{ 2313 return static_cast<_Tp&&>(__t); 2314} 2315 2316template <class _Tp> 2317inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2318_Tp&& 2319forward(typename remove_reference<_Tp>::type&& __t) _NOEXCEPT 2320{ 2321 static_assert(!is_lvalue_reference<_Tp>::value, 2322 "can not forward an rvalue as an lvalue"); 2323 return static_cast<_Tp&&>(__t); 2324} 2325 2326#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 2327 2328template <class _Tp> 2329inline _LIBCPP_INLINE_VISIBILITY 2330_Tp& 2331move(_Tp& __t) 2332{ 2333 return __t; 2334} 2335 2336template <class _Tp> 2337inline _LIBCPP_INLINE_VISIBILITY 2338const _Tp& 2339move(const _Tp& __t) 2340{ 2341 return __t; 2342} 2343 2344template <class _Tp> 2345inline _LIBCPP_INLINE_VISIBILITY 2346_Tp& 2347forward(typename remove_reference<_Tp>::type& __t) _NOEXCEPT 2348{ 2349 return __t; 2350} 2351 2352 2353template <class _Tp> 2354class __rv 2355{ 2356 typedef typename remove_reference<_Tp>::type _Trr; 2357 _Trr& t_; 2358public: 2359 _LIBCPP_INLINE_VISIBILITY 2360 _Trr* operator->() {return &t_;} 2361 _LIBCPP_INLINE_VISIBILITY 2362 explicit __rv(_Trr& __t) : t_(__t) {} 2363}; 2364 2365#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 2366 2367#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2368 2369template <class _Tp> 2370inline _LIBCPP_INLINE_VISIBILITY 2371typename decay<_Tp>::type 2372__decay_copy(_Tp&& __t) 2373{ 2374 return _VSTD::forward<_Tp>(__t); 2375} 2376 2377#else 2378 2379template <class _Tp> 2380inline _LIBCPP_INLINE_VISIBILITY 2381typename decay<_Tp>::type 2382__decay_copy(const _Tp& __t) 2383{ 2384 return _VSTD::forward<_Tp>(__t); 2385} 2386 2387#endif 2388 2389#ifndef _LIBCPP_HAS_NO_VARIADICS 2390 2391template <class _Rp, class _Class, class ..._Param> 2392struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...), true, false> 2393{ 2394 typedef _Class _ClassType; 2395 typedef _Rp _ReturnType; 2396 typedef _Rp (_FnType) (_Param...); 2397}; 2398 2399template <class _Rp, class _Class, class ..._Param> 2400struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...), true, false> 2401{ 2402 typedef _Class _ClassType; 2403 typedef _Rp _ReturnType; 2404 typedef _Rp (_FnType) (_Param..., ...); 2405}; 2406 2407template <class _Rp, class _Class, class ..._Param> 2408struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const, true, false> 2409{ 2410 typedef _Class const _ClassType; 2411 typedef _Rp _ReturnType; 2412 typedef _Rp (_FnType) (_Param...); 2413}; 2414 2415template <class _Rp, class _Class, class ..._Param> 2416struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const, true, false> 2417{ 2418 typedef _Class const _ClassType; 2419 typedef _Rp _ReturnType; 2420 typedef _Rp (_FnType) (_Param..., ...); 2421}; 2422 2423template <class _Rp, class _Class, class ..._Param> 2424struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile, true, false> 2425{ 2426 typedef _Class volatile _ClassType; 2427 typedef _Rp _ReturnType; 2428 typedef _Rp (_FnType) (_Param...); 2429}; 2430 2431template <class _Rp, class _Class, class ..._Param> 2432struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile, true, false> 2433{ 2434 typedef _Class volatile _ClassType; 2435 typedef _Rp _ReturnType; 2436 typedef _Rp (_FnType) (_Param..., ...); 2437}; 2438 2439template <class _Rp, class _Class, class ..._Param> 2440struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile, true, false> 2441{ 2442 typedef _Class const volatile _ClassType; 2443 typedef _Rp _ReturnType; 2444 typedef _Rp (_FnType) (_Param...); 2445}; 2446 2447template <class _Rp, class _Class, class ..._Param> 2448struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile, true, false> 2449{ 2450 typedef _Class const volatile _ClassType; 2451 typedef _Rp _ReturnType; 2452 typedef _Rp (_FnType) (_Param..., ...); 2453}; 2454 2455#if __has_feature(cxx_reference_qualified_functions) || \ 2456 (defined(_GNUC_VER) && _GNUC_VER >= 409) 2457 2458template <class _Rp, class _Class, class ..._Param> 2459struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &, true, false> 2460{ 2461 typedef _Class& _ClassType; 2462 typedef _Rp _ReturnType; 2463 typedef _Rp (_FnType) (_Param...); 2464}; 2465 2466template <class _Rp, class _Class, class ..._Param> 2467struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &, true, false> 2468{ 2469 typedef _Class& _ClassType; 2470 typedef _Rp _ReturnType; 2471 typedef _Rp (_FnType) (_Param..., ...); 2472}; 2473 2474template <class _Rp, class _Class, class ..._Param> 2475struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&, true, false> 2476{ 2477 typedef _Class const& _ClassType; 2478 typedef _Rp _ReturnType; 2479 typedef _Rp (_FnType) (_Param...); 2480}; 2481 2482template <class _Rp, class _Class, class ..._Param> 2483struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&, true, false> 2484{ 2485 typedef _Class const& _ClassType; 2486 typedef _Rp _ReturnType; 2487 typedef _Rp (_FnType) (_Param..., ...); 2488}; 2489 2490template <class _Rp, class _Class, class ..._Param> 2491struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&, true, false> 2492{ 2493 typedef _Class volatile& _ClassType; 2494 typedef _Rp _ReturnType; 2495 typedef _Rp (_FnType) (_Param...); 2496}; 2497 2498template <class _Rp, class _Class, class ..._Param> 2499struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&, true, false> 2500{ 2501 typedef _Class volatile& _ClassType; 2502 typedef _Rp _ReturnType; 2503 typedef _Rp (_FnType) (_Param..., ...); 2504}; 2505 2506template <class _Rp, class _Class, class ..._Param> 2507struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&, true, false> 2508{ 2509 typedef _Class const volatile& _ClassType; 2510 typedef _Rp _ReturnType; 2511 typedef _Rp (_FnType) (_Param...); 2512}; 2513 2514template <class _Rp, class _Class, class ..._Param> 2515struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&, true, false> 2516{ 2517 typedef _Class const volatile& _ClassType; 2518 typedef _Rp _ReturnType; 2519 typedef _Rp (_FnType) (_Param..., ...); 2520}; 2521 2522template <class _Rp, class _Class, class ..._Param> 2523struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) &&, true, false> 2524{ 2525 typedef _Class&& _ClassType; 2526 typedef _Rp _ReturnType; 2527 typedef _Rp (_FnType) (_Param...); 2528}; 2529 2530template <class _Rp, class _Class, class ..._Param> 2531struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) &&, true, false> 2532{ 2533 typedef _Class&& _ClassType; 2534 typedef _Rp _ReturnType; 2535 typedef _Rp (_FnType) (_Param..., ...); 2536}; 2537 2538template <class _Rp, class _Class, class ..._Param> 2539struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const&&, true, false> 2540{ 2541 typedef _Class const&& _ClassType; 2542 typedef _Rp _ReturnType; 2543 typedef _Rp (_FnType) (_Param...); 2544}; 2545 2546template <class _Rp, class _Class, class ..._Param> 2547struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const&&, true, false> 2548{ 2549 typedef _Class const&& _ClassType; 2550 typedef _Rp _ReturnType; 2551 typedef _Rp (_FnType) (_Param..., ...); 2552}; 2553 2554template <class _Rp, class _Class, class ..._Param> 2555struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) volatile&&, true, false> 2556{ 2557 typedef _Class volatile&& _ClassType; 2558 typedef _Rp _ReturnType; 2559 typedef _Rp (_FnType) (_Param...); 2560}; 2561 2562template <class _Rp, class _Class, class ..._Param> 2563struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) volatile&&, true, false> 2564{ 2565 typedef _Class volatile&& _ClassType; 2566 typedef _Rp _ReturnType; 2567 typedef _Rp (_FnType) (_Param..., ...); 2568}; 2569 2570template <class _Rp, class _Class, class ..._Param> 2571struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param...) const volatile&&, true, false> 2572{ 2573 typedef _Class const volatile&& _ClassType; 2574 typedef _Rp _ReturnType; 2575 typedef _Rp (_FnType) (_Param...); 2576}; 2577 2578template <class _Rp, class _Class, class ..._Param> 2579struct __member_pointer_traits_imp<_Rp (_Class::*)(_Param..., ...) const volatile&&, true, false> 2580{ 2581 typedef _Class const volatile&& _ClassType; 2582 typedef _Rp _ReturnType; 2583 typedef _Rp (_FnType) (_Param..., ...); 2584}; 2585 2586#endif // __has_feature(cxx_reference_qualified_functions) || _GNUC_VER >= 409 2587 2588#else // _LIBCPP_HAS_NO_VARIADICS 2589 2590template <class _Rp, class _Class> 2591struct __member_pointer_traits_imp<_Rp (_Class::*)(), true, false> 2592{ 2593 typedef _Class _ClassType; 2594 typedef _Rp _ReturnType; 2595 typedef _Rp (_FnType) (); 2596}; 2597 2598template <class _Rp, class _Class> 2599struct __member_pointer_traits_imp<_Rp (_Class::*)(...), true, false> 2600{ 2601 typedef _Class _ClassType; 2602 typedef _Rp _ReturnType; 2603 typedef _Rp (_FnType) (...); 2604}; 2605 2606template <class _Rp, class _Class, class _P0> 2607struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0), true, false> 2608{ 2609 typedef _Class _ClassType; 2610 typedef _Rp _ReturnType; 2611 typedef _Rp (_FnType) (_P0); 2612}; 2613 2614template <class _Rp, class _Class, class _P0> 2615struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, ...), true, false> 2616{ 2617 typedef _Class _ClassType; 2618 typedef _Rp _ReturnType; 2619 typedef _Rp (_FnType) (_P0, ...); 2620}; 2621 2622template <class _Rp, class _Class, class _P0, class _P1> 2623struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1), true, false> 2624{ 2625 typedef _Class _ClassType; 2626 typedef _Rp _ReturnType; 2627 typedef _Rp (_FnType) (_P0, _P1); 2628}; 2629 2630template <class _Rp, class _Class, class _P0, class _P1> 2631struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, ...), true, false> 2632{ 2633 typedef _Class _ClassType; 2634 typedef _Rp _ReturnType; 2635 typedef _Rp (_FnType) (_P0, _P1, ...); 2636}; 2637 2638template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2639struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2), true, false> 2640{ 2641 typedef _Class _ClassType; 2642 typedef _Rp _ReturnType; 2643 typedef _Rp (_FnType) (_P0, _P1, _P2); 2644}; 2645 2646template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2647struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2, ...), true, false> 2648{ 2649 typedef _Class _ClassType; 2650 typedef _Rp _ReturnType; 2651 typedef _Rp (_FnType) (_P0, _P1, _P2, ...); 2652}; 2653 2654template <class _Rp, class _Class> 2655struct __member_pointer_traits_imp<_Rp (_Class::*)() const, true, false> 2656{ 2657 typedef _Class const _ClassType; 2658 typedef _Rp _ReturnType; 2659 typedef _Rp (_FnType) (); 2660}; 2661 2662template <class _Rp, class _Class> 2663struct __member_pointer_traits_imp<_Rp (_Class::*)(...) const, true, false> 2664{ 2665 typedef _Class const _ClassType; 2666 typedef _Rp _ReturnType; 2667 typedef _Rp (_FnType) (...); 2668}; 2669 2670template <class _Rp, class _Class, class _P0> 2671struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0) const, true, false> 2672{ 2673 typedef _Class const _ClassType; 2674 typedef _Rp _ReturnType; 2675 typedef _Rp (_FnType) (_P0); 2676}; 2677 2678template <class _Rp, class _Class, class _P0> 2679struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, ...) const, true, false> 2680{ 2681 typedef _Class const _ClassType; 2682 typedef _Rp _ReturnType; 2683 typedef _Rp (_FnType) (_P0, ...); 2684}; 2685 2686template <class _Rp, class _Class, class _P0, class _P1> 2687struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1) const, true, false> 2688{ 2689 typedef _Class const _ClassType; 2690 typedef _Rp _ReturnType; 2691 typedef _Rp (_FnType) (_P0, _P1); 2692}; 2693 2694template <class _Rp, class _Class, class _P0, class _P1> 2695struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, ...) const, true, false> 2696{ 2697 typedef _Class const _ClassType; 2698 typedef _Rp _ReturnType; 2699 typedef _Rp (_FnType) (_P0, _P1, ...); 2700}; 2701 2702template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2703struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2) const, true, false> 2704{ 2705 typedef _Class const _ClassType; 2706 typedef _Rp _ReturnType; 2707 typedef _Rp (_FnType) (_P0, _P1, _P2); 2708}; 2709 2710template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2711struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2, ...) const, true, false> 2712{ 2713 typedef _Class const _ClassType; 2714 typedef _Rp _ReturnType; 2715 typedef _Rp (_FnType) (_P0, _P1, _P2, ...); 2716}; 2717 2718template <class _Rp, class _Class> 2719struct __member_pointer_traits_imp<_Rp (_Class::*)() volatile, true, false> 2720{ 2721 typedef _Class volatile _ClassType; 2722 typedef _Rp _ReturnType; 2723 typedef _Rp (_FnType) (); 2724}; 2725 2726template <class _Rp, class _Class> 2727struct __member_pointer_traits_imp<_Rp (_Class::*)(...) volatile, true, false> 2728{ 2729 typedef _Class volatile _ClassType; 2730 typedef _Rp _ReturnType; 2731 typedef _Rp (_FnType) (...); 2732}; 2733 2734template <class _Rp, class _Class, class _P0> 2735struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0) volatile, true, false> 2736{ 2737 typedef _Class volatile _ClassType; 2738 typedef _Rp _ReturnType; 2739 typedef _Rp (_FnType) (_P0); 2740}; 2741 2742template <class _Rp, class _Class, class _P0> 2743struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, ...) volatile, true, false> 2744{ 2745 typedef _Class volatile _ClassType; 2746 typedef _Rp _ReturnType; 2747 typedef _Rp (_FnType) (_P0, ...); 2748}; 2749 2750template <class _Rp, class _Class, class _P0, class _P1> 2751struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1) volatile, true, false> 2752{ 2753 typedef _Class volatile _ClassType; 2754 typedef _Rp _ReturnType; 2755 typedef _Rp (_FnType) (_P0, _P1); 2756}; 2757 2758template <class _Rp, class _Class, class _P0, class _P1> 2759struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, ...) volatile, true, false> 2760{ 2761 typedef _Class volatile _ClassType; 2762 typedef _Rp _ReturnType; 2763 typedef _Rp (_FnType) (_P0, _P1, ...); 2764}; 2765 2766template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2767struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2) volatile, true, false> 2768{ 2769 typedef _Class volatile _ClassType; 2770 typedef _Rp _ReturnType; 2771 typedef _Rp (_FnType) (_P0, _P1, _P2); 2772}; 2773 2774template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2775struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2, ...) volatile, true, false> 2776{ 2777 typedef _Class volatile _ClassType; 2778 typedef _Rp _ReturnType; 2779 typedef _Rp (_FnType) (_P0, _P1, _P2, ...); 2780}; 2781 2782template <class _Rp, class _Class> 2783struct __member_pointer_traits_imp<_Rp (_Class::*)() const volatile, true, false> 2784{ 2785 typedef _Class const volatile _ClassType; 2786 typedef _Rp _ReturnType; 2787 typedef _Rp (_FnType) (); 2788}; 2789 2790template <class _Rp, class _Class> 2791struct __member_pointer_traits_imp<_Rp (_Class::*)(...) const volatile, true, false> 2792{ 2793 typedef _Class const volatile _ClassType; 2794 typedef _Rp _ReturnType; 2795 typedef _Rp (_FnType) (...); 2796}; 2797 2798template <class _Rp, class _Class, class _P0> 2799struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0) const volatile, true, false> 2800{ 2801 typedef _Class const volatile _ClassType; 2802 typedef _Rp _ReturnType; 2803 typedef _Rp (_FnType) (_P0); 2804}; 2805 2806template <class _Rp, class _Class, class _P0> 2807struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, ...) const volatile, true, false> 2808{ 2809 typedef _Class const volatile _ClassType; 2810 typedef _Rp _ReturnType; 2811 typedef _Rp (_FnType) (_P0, ...); 2812}; 2813 2814template <class _Rp, class _Class, class _P0, class _P1> 2815struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1) const volatile, true, false> 2816{ 2817 typedef _Class const volatile _ClassType; 2818 typedef _Rp _ReturnType; 2819 typedef _Rp (_FnType) (_P0, _P1); 2820}; 2821 2822template <class _Rp, class _Class, class _P0, class _P1> 2823struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, ...) const volatile, true, false> 2824{ 2825 typedef _Class const volatile _ClassType; 2826 typedef _Rp _ReturnType; 2827 typedef _Rp (_FnType) (_P0, _P1, ...); 2828}; 2829 2830template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2831struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2) const volatile, true, false> 2832{ 2833 typedef _Class const volatile _ClassType; 2834 typedef _Rp _ReturnType; 2835 typedef _Rp (_FnType) (_P0, _P1, _P2); 2836}; 2837 2838template <class _Rp, class _Class, class _P0, class _P1, class _P2> 2839struct __member_pointer_traits_imp<_Rp (_Class::*)(_P0, _P1, _P2, ...) const volatile, true, false> 2840{ 2841 typedef _Class const volatile _ClassType; 2842 typedef _Rp _ReturnType; 2843 typedef _Rp (_FnType) (_P0, _P1, _P2, ...); 2844}; 2845 2846#endif // _LIBCPP_HAS_NO_VARIADICS 2847 2848template <class _Rp, class _Class> 2849struct __member_pointer_traits_imp<_Rp _Class::*, false, true> 2850{ 2851 typedef _Class _ClassType; 2852 typedef _Rp _ReturnType; 2853}; 2854 2855template <class _MP> 2856struct __member_pointer_traits 2857 : public __member_pointer_traits_imp<typename remove_cv<_MP>::type, 2858 is_member_function_pointer<_MP>::value, 2859 is_member_object_pointer<_MP>::value> 2860{ 2861// typedef ... _ClassType; 2862// typedef ... _ReturnType; 2863// typedef ... _FnType; 2864}; 2865 2866 2867template <class _DecayedFp> 2868struct __member_pointer_class_type {}; 2869 2870template <class _Ret, class _ClassType> 2871struct __member_pointer_class_type<_Ret _ClassType::*> { 2872 typedef _ClassType type; 2873}; 2874 2875// result_of 2876 2877template <class _Callable> class result_of; 2878 2879#ifdef _LIBCPP_HAS_NO_VARIADICS 2880 2881template <class _Fn, bool, bool> 2882class __result_of 2883{ 2884}; 2885 2886template <class _Fn> 2887class __result_of<_Fn(), true, false> 2888{ 2889public: 2890 typedef decltype(declval<_Fn>()()) type; 2891}; 2892 2893template <class _Fn, class _A0> 2894class __result_of<_Fn(_A0), true, false> 2895{ 2896public: 2897 typedef decltype(declval<_Fn>()(declval<_A0>())) type; 2898}; 2899 2900template <class _Fn, class _A0, class _A1> 2901class __result_of<_Fn(_A0, _A1), true, false> 2902{ 2903public: 2904 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>())) type; 2905}; 2906 2907template <class _Fn, class _A0, class _A1, class _A2> 2908class __result_of<_Fn(_A0, _A1, _A2), true, false> 2909{ 2910public: 2911 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>(), declval<_A2>())) type; 2912}; 2913 2914template <class _MP, class _Tp, bool _IsMemberFunctionPtr> 2915struct __result_of_mp; 2916 2917// member function pointer 2918 2919template <class _MP, class _Tp> 2920struct __result_of_mp<_MP, _Tp, true> 2921 : public __identity<typename __member_pointer_traits<_MP>::_ReturnType> 2922{ 2923}; 2924 2925// member data pointer 2926 2927template <class _MP, class _Tp, bool> 2928struct __result_of_mdp; 2929 2930template <class _Rp, class _Class, class _Tp> 2931struct __result_of_mdp<_Rp _Class::*, _Tp, false> 2932{ 2933 typedef typename __apply_cv<decltype(*_VSTD::declval<_Tp>()), _Rp>::type& type; 2934}; 2935 2936template <class _Rp, class _Class, class _Tp> 2937struct __result_of_mdp<_Rp _Class::*, _Tp, true> 2938{ 2939 typedef typename __apply_cv<_Tp, _Rp>::type& type; 2940}; 2941 2942template <class _Rp, class _Class, class _Tp> 2943struct __result_of_mp<_Rp _Class::*, _Tp, false> 2944 : public __result_of_mdp<_Rp _Class::*, _Tp, 2945 is_base_of<_Class, typename remove_reference<_Tp>::type>::value> 2946{ 2947}; 2948 2949 2950 2951template <class _Fn, class _Tp> 2952class __result_of<_Fn(_Tp), false, true> // _Fn must be member pointer 2953 : public __result_of_mp<typename remove_reference<_Fn>::type, 2954 _Tp, 2955 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2956{ 2957}; 2958 2959template <class _Fn, class _Tp, class _A0> 2960class __result_of<_Fn(_Tp, _A0), false, true> // _Fn must be member pointer 2961 : public __result_of_mp<typename remove_reference<_Fn>::type, 2962 _Tp, 2963 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2964{ 2965}; 2966 2967template <class _Fn, class _Tp, class _A0, class _A1> 2968class __result_of<_Fn(_Tp, _A0, _A1), false, true> // _Fn must be member pointer 2969 : public __result_of_mp<typename remove_reference<_Fn>::type, 2970 _Tp, 2971 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2972{ 2973}; 2974 2975template <class _Fn, class _Tp, class _A0, class _A1, class _A2> 2976class __result_of<_Fn(_Tp, _A0, _A1, _A2), false, true> // _Fn must be member pointer 2977 : public __result_of_mp<typename remove_reference<_Fn>::type, 2978 _Tp, 2979 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 2980{ 2981}; 2982 2983// result_of 2984 2985template <class _Fn> 2986class _LIBCPP_TEMPLATE_VIS result_of<_Fn()> 2987 : public __result_of<_Fn(), 2988 is_class<typename remove_reference<_Fn>::type>::value || 2989 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 2990 is_member_pointer<typename remove_reference<_Fn>::type>::value 2991 > 2992{ 2993}; 2994 2995template <class _Fn, class _A0> 2996class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0)> 2997 : public __result_of<_Fn(_A0), 2998 is_class<typename remove_reference<_Fn>::type>::value || 2999 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 3000 is_member_pointer<typename remove_reference<_Fn>::type>::value 3001 > 3002{ 3003}; 3004 3005template <class _Fn, class _A0, class _A1> 3006class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0, _A1)> 3007 : public __result_of<_Fn(_A0, _A1), 3008 is_class<typename remove_reference<_Fn>::type>::value || 3009 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 3010 is_member_pointer<typename remove_reference<_Fn>::type>::value 3011 > 3012{ 3013}; 3014 3015template <class _Fn, class _A0, class _A1, class _A2> 3016class _LIBCPP_TEMPLATE_VIS result_of<_Fn(_A0, _A1, _A2)> 3017 : public __result_of<_Fn(_A0, _A1, _A2), 3018 is_class<typename remove_reference<_Fn>::type>::value || 3019 is_function<typename remove_pointer<typename remove_reference<_Fn>::type>::type>::value, 3020 is_member_pointer<typename remove_reference<_Fn>::type>::value 3021 > 3022{ 3023}; 3024 3025#endif // _LIBCPP_HAS_NO_VARIADICS 3026 3027// template <class T, class... Args> struct is_constructible; 3028 3029namespace __is_construct 3030{ 3031struct __nat {}; 3032} 3033 3034#if !defined(_LIBCPP_CXX03_LANG) && (!__has_feature(is_constructible) || \ 3035 defined(_LIBCPP_TESTING_FALLBACK_IS_CONSTRUCTIBLE)) 3036 3037template <class _Tp, class... _Args> 3038struct __libcpp_is_constructible; 3039 3040template <class _To, class _From> 3041struct __is_invalid_base_to_derived_cast { 3042 static_assert(is_reference<_To>::value, "Wrong specialization"); 3043 using _RawFrom = __uncvref_t<_From>; 3044 using _RawTo = __uncvref_t<_To>; 3045 static const bool value = __lazy_and< 3046 __lazy_not<is_same<_RawFrom, _RawTo>>, 3047 is_base_of<_RawFrom, _RawTo>, 3048 __lazy_not<__libcpp_is_constructible<_RawTo, _From>> 3049 >::value; 3050}; 3051 3052template <class _To, class _From> 3053struct __is_invalid_lvalue_to_rvalue_cast : false_type { 3054 static_assert(is_reference<_To>::value, "Wrong specialization"); 3055}; 3056 3057template <class _ToRef, class _FromRef> 3058struct __is_invalid_lvalue_to_rvalue_cast<_ToRef&&, _FromRef&> { 3059 using _RawFrom = __uncvref_t<_FromRef>; 3060 using _RawTo = __uncvref_t<_ToRef>; 3061 static const bool value = __lazy_and< 3062 __lazy_not<is_function<_RawTo>>, 3063 __lazy_or< 3064 is_same<_RawFrom, _RawTo>, 3065 is_base_of<_RawTo, _RawFrom>> 3066 >::value; 3067}; 3068 3069struct __is_constructible_helper 3070{ 3071 template <class _To> 3072 static void __eat(_To); 3073 3074 // This overload is needed to work around a Clang bug that disallows 3075 // static_cast<T&&>(e) for non-reference-compatible types. 3076 // Example: static_cast<int&&>(declval<double>()); 3077 // NOTE: The static_cast implementation below is required to support 3078 // classes with explicit conversion operators. 3079 template <class _To, class _From, 3080 class = decltype(__eat<_To>(_VSTD::declval<_From>()))> 3081 static true_type __test_cast(int); 3082 3083 template <class _To, class _From, 3084 class = decltype(static_cast<_To>(_VSTD::declval<_From>()))> 3085 static integral_constant<bool, 3086 !__is_invalid_base_to_derived_cast<_To, _From>::value && 3087 !__is_invalid_lvalue_to_rvalue_cast<_To, _From>::value 3088 > __test_cast(long); 3089 3090 template <class, class> 3091 static false_type __test_cast(...); 3092 3093 template <class _Tp, class ..._Args, 3094 class = decltype(_Tp(_VSTD::declval<_Args>()...))> 3095 static true_type __test_nary(int); 3096 template <class _Tp, class...> 3097 static false_type __test_nary(...); 3098 3099 template <class _Tp, class _A0, class = decltype(::new _Tp(_VSTD::declval<_A0>()))> 3100 static is_destructible<_Tp> __test_unary(int); 3101 template <class, class> 3102 static false_type __test_unary(...); 3103}; 3104 3105template <class _Tp, bool = is_void<_Tp>::value> 3106struct __is_default_constructible 3107 : decltype(__is_constructible_helper::__test_nary<_Tp>(0)) 3108{}; 3109 3110template <class _Tp> 3111struct __is_default_constructible<_Tp, true> : false_type {}; 3112 3113template <class _Tp> 3114struct __is_default_constructible<_Tp[], false> : false_type {}; 3115 3116template <class _Tp, size_t _Nx> 3117struct __is_default_constructible<_Tp[_Nx], false> 3118 : __is_default_constructible<typename remove_all_extents<_Tp>::type> {}; 3119 3120template <class _Tp, class... _Args> 3121struct __libcpp_is_constructible 3122{ 3123 static_assert(sizeof...(_Args) > 1, "Wrong specialization"); 3124 typedef decltype(__is_constructible_helper::__test_nary<_Tp, _Args...>(0)) 3125 type; 3126}; 3127 3128template <class _Tp> 3129struct __libcpp_is_constructible<_Tp> : __is_default_constructible<_Tp> {}; 3130 3131template <class _Tp, class _A0> 3132struct __libcpp_is_constructible<_Tp, _A0> 3133 : public decltype(__is_constructible_helper::__test_unary<_Tp, _A0>(0)) 3134{}; 3135 3136template <class _Tp, class _A0> 3137struct __libcpp_is_constructible<_Tp&, _A0> 3138 : public decltype(__is_constructible_helper:: 3139 __test_cast<_Tp&, _A0>(0)) 3140{}; 3141 3142template <class _Tp, class _A0> 3143struct __libcpp_is_constructible<_Tp&&, _A0> 3144 : public decltype(__is_constructible_helper:: 3145 __test_cast<_Tp&&, _A0>(0)) 3146{}; 3147 3148#endif 3149 3150#if __has_feature(is_constructible) 3151template <class _Tp, class ..._Args> 3152struct _LIBCPP_TEMPLATE_VIS is_constructible 3153 : public integral_constant<bool, __is_constructible(_Tp, _Args...)> 3154 {}; 3155#elif !defined(_LIBCPP_CXX03_LANG) 3156template <class _Tp, class... _Args> 3157struct _LIBCPP_TEMPLATE_VIS is_constructible 3158 : public __libcpp_is_constructible<_Tp, _Args...>::type {}; 3159#else 3160// template <class T> struct is_constructible0; 3161 3162// main is_constructible0 test 3163 3164template <class _Tp> 3165decltype((_Tp(), true_type())) 3166__is_constructible0_test(_Tp&); 3167 3168false_type 3169__is_constructible0_test(__any); 3170 3171template <class _Tp, class _A0> 3172decltype((_Tp(_VSTD::declval<_A0>()), true_type())) 3173__is_constructible1_test(_Tp&, _A0&); 3174 3175template <class _A0> 3176false_type 3177__is_constructible1_test(__any, _A0&); 3178 3179template <class _Tp, class _A0, class _A1> 3180decltype((_Tp(_VSTD::declval<_A0>(), _VSTD::declval<_A1>()), true_type())) 3181__is_constructible2_test(_Tp&, _A0&, _A1&); 3182 3183template <class _A0, class _A1> 3184false_type 3185__is_constructible2_test(__any, _A0&, _A1&); 3186 3187template <class _Tp, class _A0, class _A1, class _A2> 3188decltype((_Tp(_VSTD::declval<_A0>(), _VSTD::declval<_A1>(), _VSTD::declval<_A2>()), true_type())) 3189__is_constructible3_test(_Tp&, _A0&, _A1&, _A2&); 3190 3191template <class _A0, class _A1, class _A2> 3192false_type 3193__is_constructible3_test(__any, _A0&, _A1&, _A2&); 3194 3195template <bool, class _Tp> 3196struct __is_constructible0_imp // false, _Tp is not a scalar 3197 : public common_type 3198 < 3199 decltype(__is_constructible0_test(declval<_Tp&>())) 3200 >::type 3201 {}; 3202 3203template <bool, class _Tp, class _A0> 3204struct __is_constructible1_imp // false, _Tp is not a scalar 3205 : public common_type 3206 < 3207 decltype(__is_constructible1_test(declval<_Tp&>(), declval<_A0&>())) 3208 >::type 3209 {}; 3210 3211template <bool, class _Tp, class _A0, class _A1> 3212struct __is_constructible2_imp // false, _Tp is not a scalar 3213 : public common_type 3214 < 3215 decltype(__is_constructible2_test(declval<_Tp&>(), declval<_A0>(), declval<_A1>())) 3216 >::type 3217 {}; 3218 3219template <bool, class _Tp, class _A0, class _A1, class _A2> 3220struct __is_constructible3_imp // false, _Tp is not a scalar 3221 : public common_type 3222 < 3223 decltype(__is_constructible3_test(declval<_Tp&>(), declval<_A0>(), declval<_A1>(), declval<_A2>())) 3224 >::type 3225 {}; 3226 3227// handle scalars and reference types 3228 3229// Scalars are default constructible, references are not 3230 3231template <class _Tp> 3232struct __is_constructible0_imp<true, _Tp> 3233 : public is_scalar<_Tp> 3234 {}; 3235 3236template <class _Tp, class _A0> 3237struct __is_constructible1_imp<true, _Tp, _A0> 3238 : public is_convertible<_A0, _Tp> 3239 {}; 3240 3241template <class _Tp, class _A0, class _A1> 3242struct __is_constructible2_imp<true, _Tp, _A0, _A1> 3243 : public false_type 3244 {}; 3245 3246template <class _Tp, class _A0, class _A1, class _A2> 3247struct __is_constructible3_imp<true, _Tp, _A0, _A1, _A2> 3248 : public false_type 3249 {}; 3250 3251// Treat scalars and reference types separately 3252 3253template <bool, class _Tp> 3254struct __is_constructible0_void_check 3255 : public __is_constructible0_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 3256 _Tp> 3257 {}; 3258 3259template <bool, class _Tp, class _A0> 3260struct __is_constructible1_void_check 3261 : public __is_constructible1_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 3262 _Tp, _A0> 3263 {}; 3264 3265template <bool, class _Tp, class _A0, class _A1> 3266struct __is_constructible2_void_check 3267 : public __is_constructible2_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 3268 _Tp, _A0, _A1> 3269 {}; 3270 3271template <bool, class _Tp, class _A0, class _A1, class _A2> 3272struct __is_constructible3_void_check 3273 : public __is_constructible3_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 3274 _Tp, _A0, _A1, _A2> 3275 {}; 3276 3277// If any of T or Args is void, is_constructible should be false 3278 3279template <class _Tp> 3280struct __is_constructible0_void_check<true, _Tp> 3281 : public false_type 3282 {}; 3283 3284template <class _Tp, class _A0> 3285struct __is_constructible1_void_check<true, _Tp, _A0> 3286 : public false_type 3287 {}; 3288 3289template <class _Tp, class _A0, class _A1> 3290struct __is_constructible2_void_check<true, _Tp, _A0, _A1> 3291 : public false_type 3292 {}; 3293 3294template <class _Tp, class _A0, class _A1, class _A2> 3295struct __is_constructible3_void_check<true, _Tp, _A0, _A1, _A2> 3296 : public false_type 3297 {}; 3298 3299// is_constructible entry point 3300 3301template <class _Tp, class _A0 = __is_construct::__nat, 3302 class _A1 = __is_construct::__nat, 3303 class _A2 = __is_construct::__nat> 3304struct _LIBCPP_TEMPLATE_VIS is_constructible 3305 : public __is_constructible3_void_check<is_void<_Tp>::value 3306 || is_abstract<_Tp>::value 3307 || is_function<_Tp>::value 3308 || is_void<_A0>::value 3309 || is_void<_A1>::value 3310 || is_void<_A2>::value, 3311 _Tp, _A0, _A1, _A2> 3312 {}; 3313 3314template <class _Tp> 3315struct _LIBCPP_TEMPLATE_VIS is_constructible<_Tp, __is_construct::__nat, __is_construct::__nat> 3316 : public __is_constructible0_void_check<is_void<_Tp>::value 3317 || is_abstract<_Tp>::value 3318 || is_function<_Tp>::value, 3319 _Tp> 3320 {}; 3321 3322template <class _Tp, class _A0> 3323struct _LIBCPP_TEMPLATE_VIS is_constructible<_Tp, _A0, __is_construct::__nat> 3324 : public __is_constructible1_void_check<is_void<_Tp>::value 3325 || is_abstract<_Tp>::value 3326 || is_function<_Tp>::value 3327 || is_void<_A0>::value, 3328 _Tp, _A0> 3329 {}; 3330 3331template <class _Tp, class _A0, class _A1> 3332struct _LIBCPP_TEMPLATE_VIS is_constructible<_Tp, _A0, _A1, __is_construct::__nat> 3333 : public __is_constructible2_void_check<is_void<_Tp>::value 3334 || is_abstract<_Tp>::value 3335 || is_function<_Tp>::value 3336 || is_void<_A0>::value 3337 || is_void<_A1>::value, 3338 _Tp, _A0, _A1> 3339 {}; 3340 3341// Array types are default constructible if their element type 3342// is default constructible 3343 3344template <class _Ap, size_t _Np> 3345struct __is_constructible0_imp<false, _Ap[_Np]> 3346 : public is_constructible<typename remove_all_extents<_Ap>::type> 3347 {}; 3348 3349template <class _Ap, size_t _Np, class _A0> 3350struct __is_constructible1_imp<false, _Ap[_Np], _A0> 3351 : public false_type 3352 {}; 3353 3354template <class _Ap, size_t _Np, class _A0, class _A1> 3355struct __is_constructible2_imp<false, _Ap[_Np], _A0, _A1> 3356 : public false_type 3357 {}; 3358 3359template <class _Ap, size_t _Np, class _A0, class _A1, class _A2> 3360struct __is_constructible3_imp<false, _Ap[_Np], _A0, _A1, _A2> 3361 : public false_type 3362 {}; 3363 3364// Incomplete array types are not constructible 3365 3366template <class _Ap> 3367struct __is_constructible0_imp<false, _Ap[]> 3368 : public false_type 3369 {}; 3370 3371template <class _Ap, class _A0> 3372struct __is_constructible1_imp<false, _Ap[], _A0> 3373 : public false_type 3374 {}; 3375 3376template <class _Ap, class _A0, class _A1> 3377struct __is_constructible2_imp<false, _Ap[], _A0, _A1> 3378 : public false_type 3379 {}; 3380 3381template <class _Ap, class _A0, class _A1, class _A2> 3382struct __is_constructible3_imp<false, _Ap[], _A0, _A1, _A2> 3383 : public false_type 3384 {}; 3385 3386#endif // __has_feature(is_constructible) 3387 3388 3389#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 3390template <class _Tp, class ..._Args> 3391_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_constructible_v 3392 = is_constructible<_Tp, _Args...>::value; 3393#endif 3394 3395// is_default_constructible 3396 3397template <class _Tp> 3398struct _LIBCPP_TEMPLATE_VIS is_default_constructible 3399 : public is_constructible<_Tp> 3400 {}; 3401 3402#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3403template <class _Tp> 3404_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_default_constructible_v 3405 = is_default_constructible<_Tp>::value; 3406#endif 3407 3408// is_copy_constructible 3409 3410template <class _Tp> 3411struct _LIBCPP_TEMPLATE_VIS is_copy_constructible 3412 : public is_constructible<_Tp, 3413 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3414 3415#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3416template <class _Tp> 3417_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_copy_constructible_v 3418 = is_copy_constructible<_Tp>::value; 3419#endif 3420 3421// is_move_constructible 3422 3423template <class _Tp> 3424struct _LIBCPP_TEMPLATE_VIS is_move_constructible 3425#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3426 : public is_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3427#else 3428 : public is_copy_constructible<_Tp> 3429#endif 3430 {}; 3431 3432#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3433template <class _Tp> 3434_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_move_constructible_v 3435 = is_move_constructible<_Tp>::value; 3436#endif 3437 3438// is_trivially_constructible 3439 3440#ifndef _LIBCPP_HAS_NO_VARIADICS 3441 3442#if __has_feature(is_trivially_constructible) || _GNUC_VER >= 501 3443 3444template <class _Tp, class... _Args> 3445struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3446 : integral_constant<bool, __is_trivially_constructible(_Tp, _Args...)> 3447{ 3448}; 3449 3450#else // !__has_feature(is_trivially_constructible) 3451 3452template <class _Tp, class... _Args> 3453struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3454 : false_type 3455{ 3456}; 3457 3458template <class _Tp> 3459struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp> 3460#if __has_feature(has_trivial_constructor) || (_GNUC_VER >= 403) 3461 : integral_constant<bool, __has_trivial_constructor(_Tp)> 3462#else 3463 : integral_constant<bool, is_scalar<_Tp>::value> 3464#endif 3465{ 3466}; 3467 3468template <class _Tp> 3469#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3470struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&&> 3471#else 3472struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp> 3473#endif 3474 : integral_constant<bool, is_scalar<_Tp>::value> 3475{ 3476}; 3477 3478template <class _Tp> 3479struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, const _Tp&> 3480 : integral_constant<bool, is_scalar<_Tp>::value> 3481{ 3482}; 3483 3484template <class _Tp> 3485struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&> 3486 : integral_constant<bool, is_scalar<_Tp>::value> 3487{ 3488}; 3489 3490#endif // !__has_feature(is_trivially_constructible) 3491 3492#else // _LIBCPP_HAS_NO_VARIADICS 3493 3494template <class _Tp, class _A0 = __is_construct::__nat, 3495 class _A1 = __is_construct::__nat> 3496struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible 3497 : false_type 3498{ 3499}; 3500 3501#if __has_feature(is_trivially_constructible) || _GNUC_VER >= 501 3502 3503template <class _Tp> 3504struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, __is_construct::__nat, 3505 __is_construct::__nat> 3506 : integral_constant<bool, __is_trivially_constructible(_Tp)> 3507{ 3508}; 3509 3510template <class _Tp> 3511struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp, 3512 __is_construct::__nat> 3513 : integral_constant<bool, __is_trivially_constructible(_Tp, _Tp)> 3514{ 3515}; 3516 3517template <class _Tp> 3518struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, const _Tp&, 3519 __is_construct::__nat> 3520 : integral_constant<bool, __is_trivially_constructible(_Tp, const _Tp&)> 3521{ 3522}; 3523 3524template <class _Tp> 3525struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&, 3526 __is_construct::__nat> 3527 : integral_constant<bool, __is_trivially_constructible(_Tp, _Tp&)> 3528{ 3529}; 3530 3531#else // !__has_feature(is_trivially_constructible) 3532 3533template <class _Tp> 3534struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, __is_construct::__nat, 3535 __is_construct::__nat> 3536 : integral_constant<bool, is_scalar<_Tp>::value> 3537{ 3538}; 3539 3540template <class _Tp> 3541struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp, 3542 __is_construct::__nat> 3543 : integral_constant<bool, is_scalar<_Tp>::value> 3544{ 3545}; 3546 3547template <class _Tp> 3548struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, const _Tp&, 3549 __is_construct::__nat> 3550 : integral_constant<bool, is_scalar<_Tp>::value> 3551{ 3552}; 3553 3554template <class _Tp> 3555struct _LIBCPP_TEMPLATE_VIS is_trivially_constructible<_Tp, _Tp&, 3556 __is_construct::__nat> 3557 : integral_constant<bool, is_scalar<_Tp>::value> 3558{ 3559}; 3560 3561#endif // !__has_feature(is_trivially_constructible) 3562 3563#endif // _LIBCPP_HAS_NO_VARIADICS 3564 3565#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 3566template <class _Tp, class... _Args> 3567_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_constructible_v 3568 = is_trivially_constructible<_Tp, _Args...>::value; 3569#endif 3570 3571// is_trivially_default_constructible 3572 3573template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_default_constructible 3574 : public is_trivially_constructible<_Tp> 3575 {}; 3576 3577#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3578template <class _Tp> 3579_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_default_constructible_v 3580 = is_trivially_default_constructible<_Tp>::value; 3581#endif 3582 3583// is_trivially_copy_constructible 3584 3585template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copy_constructible 3586 : public is_trivially_constructible<_Tp, typename add_lvalue_reference<const _Tp>::type> 3587 {}; 3588 3589#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3590template <class _Tp> 3591_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copy_constructible_v 3592 = is_trivially_copy_constructible<_Tp>::value; 3593#endif 3594 3595// is_trivially_move_constructible 3596 3597template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_move_constructible 3598#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3599 : public is_trivially_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3600#else 3601 : public is_trivially_copy_constructible<_Tp> 3602#endif 3603 {}; 3604 3605#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3606template <class _Tp> 3607_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_move_constructible_v 3608 = is_trivially_move_constructible<_Tp>::value; 3609#endif 3610 3611// is_trivially_assignable 3612 3613#if __has_feature(is_trivially_assignable) || _GNUC_VER >= 501 3614 3615template <class _Tp, class _Arg> 3616struct is_trivially_assignable 3617 : integral_constant<bool, __is_trivially_assignable(_Tp, _Arg)> 3618{ 3619}; 3620 3621#else // !__has_feature(is_trivially_assignable) 3622 3623template <class _Tp, class _Arg> 3624struct is_trivially_assignable 3625 : public false_type {}; 3626 3627template <class _Tp> 3628struct is_trivially_assignable<_Tp&, _Tp> 3629 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3630 3631template <class _Tp> 3632struct is_trivially_assignable<_Tp&, _Tp&> 3633 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3634 3635template <class _Tp> 3636struct is_trivially_assignable<_Tp&, const _Tp&> 3637 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3638 3639#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3640 3641template <class _Tp> 3642struct is_trivially_assignable<_Tp&, _Tp&&> 3643 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3644 3645#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3646 3647#endif // !__has_feature(is_trivially_assignable) 3648 3649#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3650template <class _Tp, class _Arg> 3651_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_assignable_v 3652 = is_trivially_assignable<_Tp, _Arg>::value; 3653#endif 3654 3655// is_trivially_copy_assignable 3656 3657template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copy_assignable 3658 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 3659 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3660 3661#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3662template <class _Tp> 3663_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copy_assignable_v 3664 = is_trivially_copy_assignable<_Tp>::value; 3665#endif 3666 3667// is_trivially_move_assignable 3668 3669template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_move_assignable 3670 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 3671#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3672 typename add_rvalue_reference<_Tp>::type> 3673#else 3674 typename add_lvalue_reference<_Tp>::type> 3675#endif 3676 {}; 3677 3678#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3679template <class _Tp> 3680_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_move_assignable_v 3681 = is_trivially_move_assignable<_Tp>::value; 3682#endif 3683 3684// is_trivially_destructible 3685 3686#if __has_feature(has_trivial_destructor) || (_GNUC_VER >= 403) 3687 3688template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3689 : public integral_constant<bool, is_destructible<_Tp>::value && __has_trivial_destructor(_Tp)> {}; 3690 3691#else 3692 3693template <class _Tp> struct __libcpp_trivial_destructor 3694 : public integral_constant<bool, is_scalar<_Tp>::value || 3695 is_reference<_Tp>::value> {}; 3696 3697template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible 3698 : public __libcpp_trivial_destructor<typename remove_all_extents<_Tp>::type> {}; 3699 3700template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_destructible<_Tp[]> 3701 : public false_type {}; 3702 3703#endif 3704 3705#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3706template <class _Tp> 3707_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_destructible_v 3708 = is_trivially_destructible<_Tp>::value; 3709#endif 3710 3711// is_nothrow_constructible 3712 3713#if 0 3714template <class _Tp, class... _Args> 3715struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3716 : public integral_constant<bool, __is_nothrow_constructible(_Tp(_Args...))> 3717{ 3718}; 3719 3720#else 3721 3722#ifndef _LIBCPP_HAS_NO_VARIADICS 3723 3724#if __has_feature(cxx_noexcept) || (_GNUC_VER >= 407 && __cplusplus >= 201103L) 3725 3726template <bool, bool, class _Tp, class... _Args> struct __libcpp_is_nothrow_constructible; 3727 3728template <class _Tp, class... _Args> 3729struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/false, _Tp, _Args...> 3730 : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> 3731{ 3732}; 3733 3734template <class _Tp> 3735void __implicit_conversion_to(_Tp) noexcept { } 3736 3737template <class _Tp, class _Arg> 3738struct __libcpp_is_nothrow_constructible</*is constructible*/true, /*is reference*/true, _Tp, _Arg> 3739 : public integral_constant<bool, noexcept(__implicit_conversion_to<_Tp>(declval<_Arg>()))> 3740{ 3741}; 3742 3743template <class _Tp, bool _IsReference, class... _Args> 3744struct __libcpp_is_nothrow_constructible</*is constructible*/false, _IsReference, _Tp, _Args...> 3745 : public false_type 3746{ 3747}; 3748 3749template <class _Tp, class... _Args> 3750struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3751 : __libcpp_is_nothrow_constructible<is_constructible<_Tp, _Args...>::value, is_reference<_Tp>::value, _Tp, _Args...> 3752{ 3753}; 3754 3755template <class _Tp, size_t _Ns> 3756struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp[_Ns]> 3757 : __libcpp_is_nothrow_constructible<is_constructible<_Tp>::value, is_reference<_Tp>::value, _Tp> 3758{ 3759}; 3760 3761#else // __has_feature(cxx_noexcept) 3762 3763template <class _Tp, class... _Args> 3764struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3765 : false_type 3766{ 3767}; 3768 3769template <class _Tp> 3770struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp> 3771#if __has_feature(has_nothrow_constructor) || (_GNUC_VER >= 403) 3772 : integral_constant<bool, __has_nothrow_constructor(_Tp)> 3773#else 3774 : integral_constant<bool, is_scalar<_Tp>::value> 3775#endif 3776{ 3777}; 3778 3779template <class _Tp> 3780#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3781struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, _Tp&&> 3782#else 3783struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, _Tp> 3784#endif 3785#if __has_feature(has_nothrow_copy) || (_GNUC_VER >= 403) 3786 : integral_constant<bool, __has_nothrow_copy(_Tp)> 3787#else 3788 : integral_constant<bool, is_scalar<_Tp>::value> 3789#endif 3790{ 3791}; 3792 3793template <class _Tp> 3794struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, const _Tp&> 3795#if __has_feature(has_nothrow_copy) || (_GNUC_VER >= 403) 3796 : integral_constant<bool, __has_nothrow_copy(_Tp)> 3797#else 3798 : integral_constant<bool, is_scalar<_Tp>::value> 3799#endif 3800{ 3801}; 3802 3803template <class _Tp> 3804struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, _Tp&> 3805#if __has_feature(has_nothrow_copy) || (_GNUC_VER >= 403) 3806 : integral_constant<bool, __has_nothrow_copy(_Tp)> 3807#else 3808 : integral_constant<bool, is_scalar<_Tp>::value> 3809#endif 3810{ 3811}; 3812 3813#endif // __has_feature(cxx_noexcept) 3814 3815#else // _LIBCPP_HAS_NO_VARIADICS 3816 3817template <class _Tp, class _A0 = __is_construct::__nat, 3818 class _A1 = __is_construct::__nat> 3819struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible 3820 : false_type 3821{ 3822}; 3823 3824template <class _Tp> 3825struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, __is_construct::__nat, 3826 __is_construct::__nat> 3827#if __has_feature(has_nothrow_constructor) || (_GNUC_VER >= 403) 3828 : integral_constant<bool, __has_nothrow_constructor(_Tp)> 3829#else 3830 : integral_constant<bool, is_scalar<_Tp>::value> 3831#endif 3832{ 3833}; 3834 3835template <class _Tp> 3836struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, _Tp, 3837 __is_construct::__nat> 3838#if __has_feature(has_nothrow_copy) || (_GNUC_VER >= 403) 3839 : integral_constant<bool, __has_nothrow_copy(_Tp)> 3840#else 3841 : integral_constant<bool, is_scalar<_Tp>::value> 3842#endif 3843{ 3844}; 3845 3846template <class _Tp> 3847struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, const _Tp&, 3848 __is_construct::__nat> 3849#if __has_feature(has_nothrow_copy) || (_GNUC_VER >= 403) 3850 : integral_constant<bool, __has_nothrow_copy(_Tp)> 3851#else 3852 : integral_constant<bool, is_scalar<_Tp>::value> 3853#endif 3854{ 3855}; 3856 3857template <class _Tp> 3858struct _LIBCPP_TEMPLATE_VIS is_nothrow_constructible<_Tp, _Tp&, 3859 __is_construct::__nat> 3860#if __has_feature(has_nothrow_copy) || (_GNUC_VER >= 403) 3861 : integral_constant<bool, __has_nothrow_copy(_Tp)> 3862#else 3863 : integral_constant<bool, is_scalar<_Tp>::value> 3864#endif 3865{ 3866}; 3867 3868#endif // _LIBCPP_HAS_NO_VARIADICS 3869#endif // __has_feature(is_nothrow_constructible) 3870 3871#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 3872template <class _Tp, class ..._Args> 3873_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_constructible_v 3874 = is_nothrow_constructible<_Tp, _Args...>::value; 3875#endif 3876 3877// is_nothrow_default_constructible 3878 3879template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_default_constructible 3880 : public is_nothrow_constructible<_Tp> 3881 {}; 3882 3883#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3884template <class _Tp> 3885_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_default_constructible_v 3886 = is_nothrow_default_constructible<_Tp>::value; 3887#endif 3888 3889// is_nothrow_copy_constructible 3890 3891template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_constructible 3892 : public is_nothrow_constructible<_Tp, 3893 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3894 3895#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3896template <class _Tp> 3897_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_copy_constructible_v 3898 = is_nothrow_copy_constructible<_Tp>::value; 3899#endif 3900 3901// is_nothrow_move_constructible 3902 3903template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_constructible 3904#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3905 : public is_nothrow_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 3906#else 3907 : public is_nothrow_copy_constructible<_Tp> 3908#endif 3909 {}; 3910 3911#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3912template <class _Tp> 3913_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_move_constructible_v 3914 = is_nothrow_move_constructible<_Tp>::value; 3915#endif 3916 3917// is_nothrow_assignable 3918 3919#if __has_feature(cxx_noexcept) || (_GNUC_VER >= 407 && __cplusplus >= 201103L) 3920 3921template <bool, class _Tp, class _Arg> struct __libcpp_is_nothrow_assignable; 3922 3923template <class _Tp, class _Arg> 3924struct __libcpp_is_nothrow_assignable<false, _Tp, _Arg> 3925 : public false_type 3926{ 3927}; 3928 3929template <class _Tp, class _Arg> 3930struct __libcpp_is_nothrow_assignable<true, _Tp, _Arg> 3931 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>()) > 3932{ 3933}; 3934 3935template <class _Tp, class _Arg> 3936struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable 3937 : public __libcpp_is_nothrow_assignable<is_assignable<_Tp, _Arg>::value, _Tp, _Arg> 3938{ 3939}; 3940 3941#else // __has_feature(cxx_noexcept) 3942 3943template <class _Tp, class _Arg> 3944struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable 3945 : public false_type {}; 3946 3947template <class _Tp> 3948struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable<_Tp&, _Tp> 3949#if __has_feature(has_nothrow_assign) || (_GNUC_VER >= 403) 3950 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 3951#else 3952 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3953#endif 3954 3955template <class _Tp> 3956struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable<_Tp&, _Tp&> 3957#if __has_feature(has_nothrow_assign) || (_GNUC_VER >= 403) 3958 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 3959#else 3960 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3961#endif 3962 3963template <class _Tp> 3964struct _LIBCPP_TEMPLATE_VIS is_nothrow_assignable<_Tp&, const _Tp&> 3965#if __has_feature(has_nothrow_assign) || (_GNUC_VER >= 403) 3966 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 3967#else 3968 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3969#endif 3970 3971#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3972 3973template <class _Tp> 3974struct is_nothrow_assignable<_Tp&, _Tp&&> 3975#if __has_feature(has_nothrow_assign) || (_GNUC_VER >= 403) 3976 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 3977#else 3978 : integral_constant<bool, is_scalar<_Tp>::value> {}; 3979#endif 3980 3981#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3982 3983#endif // __has_feature(cxx_noexcept) 3984 3985#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3986template <class _Tp, class _Arg> 3987_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_assignable_v 3988 = is_nothrow_assignable<_Tp, _Arg>::value; 3989#endif 3990 3991// is_nothrow_copy_assignable 3992 3993template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_copy_assignable 3994 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 3995 typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {}; 3996 3997#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 3998template <class _Tp> 3999_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_copy_assignable_v 4000 = is_nothrow_copy_assignable<_Tp>::value; 4001#endif 4002 4003// is_nothrow_move_assignable 4004 4005template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_move_assignable 4006 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 4007#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4008 typename add_rvalue_reference<_Tp>::type> 4009#else 4010 typename add_lvalue_reference<_Tp>::type> 4011#endif 4012 {}; 4013 4014#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4015template <class _Tp> 4016_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_move_assignable_v 4017 = is_nothrow_move_assignable<_Tp>::value; 4018#endif 4019 4020// is_nothrow_destructible 4021 4022#if __has_feature(cxx_noexcept) || (_GNUC_VER >= 407 && __cplusplus >= 201103L) 4023 4024template <bool, class _Tp> struct __libcpp_is_nothrow_destructible; 4025 4026template <class _Tp> 4027struct __libcpp_is_nothrow_destructible<false, _Tp> 4028 : public false_type 4029{ 4030}; 4031 4032template <class _Tp> 4033struct __libcpp_is_nothrow_destructible<true, _Tp> 4034 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>().~_Tp()) > 4035{ 4036}; 4037 4038template <class _Tp> 4039struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 4040 : public __libcpp_is_nothrow_destructible<is_destructible<_Tp>::value, _Tp> 4041{ 4042}; 4043 4044template <class _Tp, size_t _Ns> 4045struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[_Ns]> 4046 : public is_nothrow_destructible<_Tp> 4047{ 4048}; 4049 4050template <class _Tp> 4051struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&> 4052 : public true_type 4053{ 4054}; 4055 4056#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4057 4058template <class _Tp> 4059struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp&&> 4060 : public true_type 4061{ 4062}; 4063 4064#endif 4065 4066#else 4067 4068template <class _Tp> struct __libcpp_nothrow_destructor 4069 : public integral_constant<bool, is_scalar<_Tp>::value || 4070 is_reference<_Tp>::value> {}; 4071 4072template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible 4073 : public __libcpp_nothrow_destructor<typename remove_all_extents<_Tp>::type> {}; 4074 4075template <class _Tp> 4076struct _LIBCPP_TEMPLATE_VIS is_nothrow_destructible<_Tp[]> 4077 : public false_type {}; 4078 4079#endif 4080 4081#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4082template <class _Tp> 4083_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_nothrow_destructible_v 4084 = is_nothrow_destructible<_Tp>::value; 4085#endif 4086 4087// is_pod 4088 4089#if __has_feature(is_pod) || (_GNUC_VER >= 403) 4090 4091template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod 4092 : public integral_constant<bool, __is_pod(_Tp)> {}; 4093 4094#else 4095 4096template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pod 4097 : public integral_constant<bool, is_trivially_default_constructible<_Tp>::value && 4098 is_trivially_copy_constructible<_Tp>::value && 4099 is_trivially_copy_assignable<_Tp>::value && 4100 is_trivially_destructible<_Tp>::value> {}; 4101 4102#endif 4103 4104#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4105template <class _Tp> 4106_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_pod_v 4107 = is_pod<_Tp>::value; 4108#endif 4109 4110// is_literal_type; 4111 4112template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_literal_type 4113#ifdef _LIBCPP_IS_LITERAL 4114 : public integral_constant<bool, _LIBCPP_IS_LITERAL(_Tp)> 4115#else 4116 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value || 4117 is_reference<typename remove_all_extents<_Tp>::type>::value> 4118#endif 4119 {}; 4120 4121#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4122template <class _Tp> 4123_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_literal_type_v 4124 = is_literal_type<_Tp>::value; 4125#endif 4126 4127// is_standard_layout; 4128 4129template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_standard_layout 4130#if __has_feature(is_standard_layout) || (_GNUC_VER >= 407) 4131 : public integral_constant<bool, __is_standard_layout(_Tp)> 4132#else 4133 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 4134#endif 4135 {}; 4136 4137#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4138template <class _Tp> 4139_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_standard_layout_v 4140 = is_standard_layout<_Tp>::value; 4141#endif 4142 4143// is_trivially_copyable; 4144 4145template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivially_copyable 4146#if __has_feature(is_trivially_copyable) 4147 : public integral_constant<bool, __is_trivially_copyable(_Tp)> 4148#elif _GNUC_VER >= 501 4149 : public integral_constant<bool, !is_volatile<_Tp>::value && __is_trivially_copyable(_Tp)> 4150#else 4151 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 4152#endif 4153 {}; 4154 4155#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4156template <class _Tp> 4157_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivially_copyable_v 4158 = is_trivially_copyable<_Tp>::value; 4159#endif 4160 4161// is_trivial; 4162 4163template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_trivial 4164#if __has_feature(is_trivial) || _GNUC_VER >= 407 4165 : public integral_constant<bool, __is_trivial(_Tp)> 4166#else 4167 : integral_constant<bool, is_trivially_copyable<_Tp>::value && 4168 is_trivially_default_constructible<_Tp>::value> 4169#endif 4170 {}; 4171 4172#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) 4173template <class _Tp> 4174_LIBCPP_INLINE_VAR _LIBCPP_CONSTEXPR bool is_trivial_v 4175 = is_trivial<_Tp>::value; 4176#endif 4177 4178template <class _Tp> struct __is_reference_wrapper_impl : public false_type {}; 4179template <class _Tp> struct __is_reference_wrapper_impl<reference_wrapper<_Tp> > : public true_type {}; 4180template <class _Tp> struct __is_reference_wrapper 4181 : public __is_reference_wrapper_impl<typename remove_cv<_Tp>::type> {}; 4182 4183#ifndef _LIBCPP_CXX03_LANG 4184 4185template <class _Fp, class _A0, 4186 class _DecayFp = typename decay<_Fp>::type, 4187 class _DecayA0 = typename decay<_A0>::type, 4188 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 4189using __enable_if_bullet1 = typename enable_if 4190 < 4191 is_member_function_pointer<_DecayFp>::value 4192 && is_base_of<_ClassT, _DecayA0>::value 4193 >::type; 4194 4195template <class _Fp, class _A0, 4196 class _DecayFp = typename decay<_Fp>::type, 4197 class _DecayA0 = typename decay<_A0>::type> 4198using __enable_if_bullet2 = typename enable_if 4199 < 4200 is_member_function_pointer<_DecayFp>::value 4201 && __is_reference_wrapper<_DecayA0>::value 4202 >::type; 4203 4204template <class _Fp, class _A0, 4205 class _DecayFp = typename decay<_Fp>::type, 4206 class _DecayA0 = typename decay<_A0>::type, 4207 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 4208using __enable_if_bullet3 = typename enable_if 4209 < 4210 is_member_function_pointer<_DecayFp>::value 4211 && !is_base_of<_ClassT, _DecayA0>::value 4212 && !__is_reference_wrapper<_DecayA0>::value 4213 >::type; 4214 4215template <class _Fp, class _A0, 4216 class _DecayFp = typename decay<_Fp>::type, 4217 class _DecayA0 = typename decay<_A0>::type, 4218 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 4219using __enable_if_bullet4 = typename enable_if 4220 < 4221 is_member_object_pointer<_DecayFp>::value 4222 && is_base_of<_ClassT, _DecayA0>::value 4223 >::type; 4224 4225template <class _Fp, class _A0, 4226 class _DecayFp = typename decay<_Fp>::type, 4227 class _DecayA0 = typename decay<_A0>::type> 4228using __enable_if_bullet5 = typename enable_if 4229 < 4230 is_member_object_pointer<_DecayFp>::value 4231 && __is_reference_wrapper<_DecayA0>::value 4232 >::type; 4233 4234template <class _Fp, class _A0, 4235 class _DecayFp = typename decay<_Fp>::type, 4236 class _DecayA0 = typename decay<_A0>::type, 4237 class _ClassT = typename __member_pointer_class_type<_DecayFp>::type> 4238using __enable_if_bullet6 = typename enable_if 4239 < 4240 is_member_object_pointer<_DecayFp>::value 4241 && !is_base_of<_ClassT, _DecayA0>::value 4242 && !__is_reference_wrapper<_DecayA0>::value 4243 >::type; 4244 4245// __invoke forward declarations 4246 4247// fall back - none of the bullets 4248 4249#define _LIBCPP_INVOKE_RETURN(...) \ 4250 noexcept(noexcept(__VA_ARGS__)) -> decltype(__VA_ARGS__) \ 4251 { return __VA_ARGS__; } 4252 4253template <class ..._Args> 4254auto __invoke(__any, _Args&& ...__args) -> __nat; 4255 4256template <class ..._Args> 4257auto __invoke_constexpr(__any, _Args&& ...__args) -> __nat; 4258 4259// bullets 1, 2 and 3 4260 4261template <class _Fp, class _A0, class ..._Args, 4262 class = __enable_if_bullet1<_Fp, _A0>> 4263inline _LIBCPP_INLINE_VISIBILITY 4264auto 4265__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 4266_LIBCPP_INVOKE_RETURN((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) 4267 4268template <class _Fp, class _A0, class ..._Args, 4269 class = __enable_if_bullet1<_Fp, _A0>> 4270inline _LIBCPP_INLINE_VISIBILITY 4271_LIBCPP_CONSTEXPR auto 4272__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 4273_LIBCPP_INVOKE_RETURN((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)) 4274 4275template <class _Fp, class _A0, class ..._Args, 4276 class = __enable_if_bullet2<_Fp, _A0>> 4277inline _LIBCPP_INLINE_VISIBILITY 4278auto 4279__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 4280_LIBCPP_INVOKE_RETURN((__a0.get().*__f)(_VSTD::forward<_Args>(__args)...)) 4281 4282template <class _Fp, class _A0, class ..._Args, 4283 class = __enable_if_bullet2<_Fp, _A0>> 4284inline _LIBCPP_INLINE_VISIBILITY 4285_LIBCPP_CONSTEXPR auto 4286__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 4287_LIBCPP_INVOKE_RETURN((__a0.get().*__f)(_VSTD::forward<_Args>(__args)...)) 4288 4289template <class _Fp, class _A0, class ..._Args, 4290 class = __enable_if_bullet3<_Fp, _A0>> 4291inline _LIBCPP_INLINE_VISIBILITY 4292auto 4293__invoke(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 4294_LIBCPP_INVOKE_RETURN(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) 4295 4296template <class _Fp, class _A0, class ..._Args, 4297 class = __enable_if_bullet3<_Fp, _A0>> 4298inline _LIBCPP_INLINE_VISIBILITY 4299_LIBCPP_CONSTEXPR auto 4300__invoke_constexpr(_Fp&& __f, _A0&& __a0, _Args&& ...__args) 4301_LIBCPP_INVOKE_RETURN(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)) 4302 4303// bullets 4, 5 and 6 4304 4305template <class _Fp, class _A0, 4306 class = __enable_if_bullet4<_Fp, _A0>> 4307inline _LIBCPP_INLINE_VISIBILITY 4308auto 4309__invoke(_Fp&& __f, _A0&& __a0) 4310_LIBCPP_INVOKE_RETURN(_VSTD::forward<_A0>(__a0).*__f) 4311 4312template <class _Fp, class _A0, 4313 class = __enable_if_bullet4<_Fp, _A0>> 4314inline _LIBCPP_INLINE_VISIBILITY 4315_LIBCPP_CONSTEXPR auto 4316__invoke_constexpr(_Fp&& __f, _A0&& __a0) 4317_LIBCPP_INVOKE_RETURN(_VSTD::forward<_A0>(__a0).*__f) 4318 4319template <class _Fp, class _A0, 4320 class = __enable_if_bullet5<_Fp, _A0>> 4321inline _LIBCPP_INLINE_VISIBILITY 4322auto 4323__invoke(_Fp&& __f, _A0&& __a0) 4324_LIBCPP_INVOKE_RETURN(__a0.get().*__f) 4325 4326template <class _Fp, class _A0, 4327 class = __enable_if_bullet5<_Fp, _A0>> 4328inline _LIBCPP_INLINE_VISIBILITY 4329_LIBCPP_CONSTEXPR auto 4330__invoke_constexpr(_Fp&& __f, _A0&& __a0) 4331_LIBCPP_INVOKE_RETURN(__a0.get().*__f) 4332 4333template <class _Fp, class _A0, 4334 class = __enable_if_bullet6<_Fp, _A0>> 4335inline _LIBCPP_INLINE_VISIBILITY 4336auto 4337__invoke(_Fp&& __f, _A0&& __a0) 4338_LIBCPP_INVOKE_RETURN((*_VSTD::forward<_A0>(__a0)).*__f) 4339 4340template <class _Fp, class _A0, 4341 class = __enable_if_bullet6<_Fp, _A0>> 4342inline _LIBCPP_INLINE_VISIBILITY 4343_LIBCPP_CONSTEXPR auto 4344__invoke_constexpr(_Fp&& __f, _A0&& __a0) 4345_LIBCPP_INVOKE_RETURN((*_VSTD::forward<_A0>(__a0)).*__f) 4346 4347// bullet 7 4348 4349template <class _Fp, class ..._Args> 4350inline _LIBCPP_INLINE_VISIBILITY 4351auto 4352__invoke(_Fp&& __f, _Args&& ...__args) 4353_LIBCPP_INVOKE_RETURN(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) 4354 4355template <class _Fp, class ..._Args> 4356inline _LIBCPP_INLINE_VISIBILITY 4357_LIBCPP_CONSTEXPR auto 4358__invoke_constexpr(_Fp&& __f, _Args&& ...__args) 4359_LIBCPP_INVOKE_RETURN(_VSTD::forward<_Fp>(__f)(_VSTD::forward<_Args>(__args)...)) 4360 4361#undef _LIBCPP_INVOKE_RETURN 4362 4363// __invokable 4364 4365template <class _Ret, class _Fp, class ..._Args> 4366struct __invokable_r 4367{ 4368 // FIXME: Check that _Ret, _Fp, and _Args... are all complete types, cv void, 4369 // or incomplete array types as required by the standard. 4370 using _Result = decltype( 4371 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...)); 4372 4373 using type = 4374 typename conditional< 4375 !is_same<_Result, __nat>::value, 4376 typename conditional< 4377 is_void<_Ret>::value, 4378 true_type, 4379 is_convertible<_Result, _Ret> 4380 >::type, 4381 false_type 4382 >::type; 4383 static const bool value = type::value; 4384}; 4385 4386template <class _Fp, class ..._Args> 4387using __invokable = __invokable_r<void, _Fp, _Args...>; 4388 4389template <bool _IsInvokable, bool _IsCVVoid, class _Ret, class _Fp, class ..._Args> 4390struct __nothrow_invokable_r_imp { 4391 static const bool value = false; 4392}; 4393 4394template <class _Ret, class _Fp, class ..._Args> 4395struct __nothrow_invokable_r_imp<true, false, _Ret, _Fp, _Args...> 4396{ 4397 typedef __nothrow_invokable_r_imp _ThisT; 4398 4399 template <class _Tp> 4400 static void __test_noexcept(_Tp) noexcept; 4401 4402 static const bool value = noexcept(_ThisT::__test_noexcept<_Ret>( 4403 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...))); 4404}; 4405 4406template <class _Ret, class _Fp, class ..._Args> 4407struct __nothrow_invokable_r_imp<true, true, _Ret, _Fp, _Args...> 4408{ 4409 static const bool value = noexcept( 4410 _VSTD::__invoke(_VSTD::declval<_Fp>(), _VSTD::declval<_Args>()...)); 4411}; 4412 4413template <class _Ret, class _Fp, class ..._Args> 4414using __nothrow_invokable_r = 4415 __nothrow_invokable_r_imp< 4416 __invokable_r<_Ret, _Fp, _Args...>::value, 4417 is_void<_Ret>::value, 4418 _Ret, _Fp, _Args... 4419 >; 4420 4421template <class _Fp, class ..._Args> 4422using __nothrow_invokable = 4423 __nothrow_invokable_r_imp< 4424 __invokable<_Fp, _Args...>::value, 4425 true, void, _Fp, _Args... 4426 >; 4427 4428template <class _Fp, class ..._Args> 4429struct __invoke_of 4430 : public enable_if< 4431 __invokable<_Fp, _Args...>::value, 4432 typename __invokable_r<void, _Fp, _Args...>::_Result> 4433{ 4434}; 4435 4436// result_of 4437 4438template <class _Fp, class ..._Args> 4439class _LIBCPP_TEMPLATE_VIS result_of<_Fp(_Args...)> 4440 : public __invoke_of<_Fp, _Args...> 4441{ 4442}; 4443 4444#if _LIBCPP_STD_VER > 11 4445template <class _Tp> using result_of_t = typename result_of<_Tp>::type; 4446#endif 4447 4448#if _LIBCPP_STD_VER > 14 4449 4450// invoke_result 4451 4452template <class _Fn, class... _Args> 4453struct _LIBCPP_TEMPLATE_VIS invoke_result 4454 : __invoke_of<_Fn, _Args...> 4455{ 4456}; 4457 4458template <class _Fn, class... _Args> 4459using invoke_result_t = typename invoke_result<_Fn, _Args...>::type; 4460 4461// is_invocable 4462 4463template <class _Fn, class ..._Args> 4464struct _LIBCPP_TEMPLATE_VIS is_invocable 4465 : integral_constant<bool, __invokable<_Fn, _Args...>::value> {}; 4466 4467template <class _Ret, class _Fn, class ..._Args> 4468struct _LIBCPP_TEMPLATE_VIS is_invocable_r 4469 : integral_constant<bool, __invokable_r<_Ret, _Fn, _Args...>::value> {}; 4470 4471template <class _Fn, class ..._Args> 4472_LIBCPP_INLINE_VAR constexpr bool is_invocable_v 4473 = is_invocable<_Fn, _Args...>::value; 4474 4475template <class _Ret, class _Fn, class ..._Args> 4476_LIBCPP_INLINE_VAR constexpr bool is_invocable_r_v 4477 = is_invocable_r<_Ret, _Fn, _Args...>::value; 4478 4479// is_nothrow_invocable 4480 4481template <class _Fn, class ..._Args> 4482struct _LIBCPP_TEMPLATE_VIS is_nothrow_invocable 4483 : integral_constant<bool, __nothrow_invokable<_Fn, _Args...>::value> {}; 4484 4485template <class _Ret, class _Fn, class ..._Args> 4486struct _LIBCPP_TEMPLATE_VIS is_nothrow_invocable_r 4487 : integral_constant<bool, __nothrow_invokable_r<_Ret, _Fn, _Args...>::value> {}; 4488 4489template <class _Fn, class ..._Args> 4490_LIBCPP_INLINE_VAR constexpr bool is_nothrow_invocable_v 4491 = is_nothrow_invocable<_Fn, _Args...>::value; 4492 4493template <class _Ret, class _Fn, class ..._Args> 4494_LIBCPP_INLINE_VAR constexpr bool is_nothrow_invocable_r_v 4495 = is_nothrow_invocable_r<_Ret, _Fn, _Args...>::value; 4496 4497#endif // _LIBCPP_STD_VER > 14 4498 4499#endif // !defined(_LIBCPP_CXX03_LANG) 4500 4501template <class _Tp> struct __is_swappable; 4502template <class _Tp> struct __is_nothrow_swappable; 4503 4504template <class _Tp> 4505inline _LIBCPP_INLINE_VISIBILITY 4506#ifndef _LIBCPP_CXX03_LANG 4507typename enable_if 4508< 4509 is_move_constructible<_Tp>::value && 4510 is_move_assignable<_Tp>::value 4511>::type 4512#else 4513void 4514#endif 4515swap(_Tp& __x, _Tp& __y) _NOEXCEPT_(is_nothrow_move_constructible<_Tp>::value && 4516 is_nothrow_move_assignable<_Tp>::value) 4517{ 4518 _Tp __t(_VSTD::move(__x)); 4519 __x = _VSTD::move(__y); 4520 __y = _VSTD::move(__t); 4521} 4522 4523template<class _Tp, size_t _Np> 4524inline _LIBCPP_INLINE_VISIBILITY 4525typename enable_if< 4526 __is_swappable<_Tp>::value 4527>::type 4528swap(_Tp (&__a)[_Np], _Tp (&__b)[_Np]) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value); 4529 4530template <class _ForwardIterator1, class _ForwardIterator2> 4531inline _LIBCPP_INLINE_VISIBILITY 4532void 4533iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) 4534 // _NOEXCEPT_(_NOEXCEPT_(swap(*__a, *__b))) 4535 _NOEXCEPT_(_NOEXCEPT_(swap(*_VSTD::declval<_ForwardIterator1>(), 4536 *_VSTD::declval<_ForwardIterator2>()))) 4537{ 4538 swap(*__a, *__b); 4539} 4540 4541// __swappable 4542 4543namespace __detail 4544{ 4545// ALL generic swap overloads MUST already have a declaration available at this point. 4546 4547template <class _Tp, class _Up = _Tp, 4548 bool _NotVoid = !is_void<_Tp>::value && !is_void<_Up>::value> 4549struct __swappable_with 4550{ 4551 template <class _LHS, class _RHS> 4552 static decltype(swap(_VSTD::declval<_LHS>(), _VSTD::declval<_RHS>())) 4553 __test_swap(int); 4554 template <class, class> 4555 static __nat __test_swap(long); 4556 4557 // Extra parens are needed for the C++03 definition of decltype. 4558 typedef decltype((__test_swap<_Tp, _Up>(0))) __swap1; 4559 typedef decltype((__test_swap<_Up, _Tp>(0))) __swap2; 4560 4561 static const bool value = !is_same<__swap1, __nat>::value 4562 && !is_same<__swap2, __nat>::value; 4563}; 4564 4565template <class _Tp, class _Up> 4566struct __swappable_with<_Tp, _Up, false> : false_type {}; 4567 4568template <class _Tp, class _Up = _Tp, bool _Swappable = __swappable_with<_Tp, _Up>::value> 4569struct __nothrow_swappable_with { 4570 static const bool value = 4571#ifndef _LIBCPP_HAS_NO_NOEXCEPT 4572 noexcept(swap(_VSTD::declval<_Tp>(), _VSTD::declval<_Up>())) 4573 && noexcept(swap(_VSTD::declval<_Up>(), _VSTD::declval<_Tp>())); 4574#else 4575 false; 4576#endif 4577}; 4578 4579template <class _Tp, class _Up> 4580struct __nothrow_swappable_with<_Tp, _Up, false> : false_type {}; 4581 4582} // __detail 4583 4584template <class _Tp> 4585struct __is_swappable 4586 : public integral_constant<bool, __detail::__swappable_with<_Tp&>::value> 4587{ 4588}; 4589 4590template <class _Tp> 4591struct __is_nothrow_swappable 4592 : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp&>::value> 4593{ 4594}; 4595 4596#if _LIBCPP_STD_VER > 14 4597 4598template <class _Tp, class _Up> 4599struct _LIBCPP_TEMPLATE_VIS is_swappable_with 4600 : public integral_constant<bool, __detail::__swappable_with<_Tp, _Up>::value> 4601{ 4602}; 4603 4604template <class _Tp> 4605struct _LIBCPP_TEMPLATE_VIS is_swappable 4606 : public conditional< 4607 __is_referenceable<_Tp>::value, 4608 is_swappable_with< 4609 typename add_lvalue_reference<_Tp>::type, 4610 typename add_lvalue_reference<_Tp>::type>, 4611 false_type 4612 >::type 4613{ 4614}; 4615 4616template <class _Tp, class _Up> 4617struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable_with 4618 : public integral_constant<bool, __detail::__nothrow_swappable_with<_Tp, _Up>::value> 4619{ 4620}; 4621 4622template <class _Tp> 4623struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable 4624 : public conditional< 4625 __is_referenceable<_Tp>::value, 4626 is_nothrow_swappable_with< 4627 typename add_lvalue_reference<_Tp>::type, 4628 typename add_lvalue_reference<_Tp>::type>, 4629 false_type 4630 >::type 4631{ 4632}; 4633 4634template <class _Tp, class _Up> 4635_LIBCPP_INLINE_VAR constexpr bool is_swappable_with_v 4636 = is_swappable_with<_Tp, _Up>::value; 4637 4638template <class _Tp> 4639_LIBCPP_INLINE_VAR constexpr bool is_swappable_v 4640 = is_swappable<_Tp>::value; 4641 4642template <class _Tp, class _Up> 4643_LIBCPP_INLINE_VAR constexpr bool is_nothrow_swappable_with_v 4644 = is_nothrow_swappable_with<_Tp, _Up>::value; 4645 4646template <class _Tp> 4647_LIBCPP_INLINE_VAR constexpr bool is_nothrow_swappable_v 4648 = is_nothrow_swappable<_Tp>::value; 4649 4650#endif // _LIBCPP_STD_VER > 14 4651 4652#ifdef _LIBCPP_UNDERLYING_TYPE 4653 4654template <class _Tp> 4655struct underlying_type 4656{ 4657 typedef _LIBCPP_UNDERLYING_TYPE(_Tp) type; 4658}; 4659 4660#if _LIBCPP_STD_VER > 11 4661template <class _Tp> using underlying_type_t = typename underlying_type<_Tp>::type; 4662#endif 4663 4664#else // _LIBCPP_UNDERLYING_TYPE 4665 4666template <class _Tp, bool _Support = false> 4667struct underlying_type 4668{ 4669 static_assert(_Support, "The underyling_type trait requires compiler " 4670 "support. Either no such support exists or " 4671 "libc++ does not know how to use it."); 4672}; 4673 4674#endif // _LIBCPP_UNDERLYING_TYPE 4675 4676 4677template <class _Tp, bool = is_enum<_Tp>::value> 4678struct __sfinae_underlying_type 4679{ 4680 typedef typename underlying_type<_Tp>::type type; 4681 typedef decltype(((type)1) + 0) __promoted_type; 4682}; 4683 4684template <class _Tp> 4685struct __sfinae_underlying_type<_Tp, false> {}; 4686 4687inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4688int __convert_to_integral(int __val) { return __val; } 4689 4690inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4691unsigned __convert_to_integral(unsigned __val) { return __val; } 4692 4693inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4694long __convert_to_integral(long __val) { return __val; } 4695 4696inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4697unsigned long __convert_to_integral(unsigned long __val) { return __val; } 4698 4699inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4700long long __convert_to_integral(long long __val) { return __val; } 4701 4702inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4703unsigned long long __convert_to_integral(unsigned long long __val) {return __val; } 4704 4705template<typename _Fp> 4706inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4707typename enable_if<is_floating_point<_Fp>::value, long long>::type 4708 __convert_to_integral(_Fp __val) { return __val; } 4709 4710#ifndef _LIBCPP_HAS_NO_INT128 4711inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4712__int128_t __convert_to_integral(__int128_t __val) { return __val; } 4713 4714inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4715__uint128_t __convert_to_integral(__uint128_t __val) { return __val; } 4716#endif 4717 4718template <class _Tp> 4719inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4720typename __sfinae_underlying_type<_Tp>::__promoted_type 4721__convert_to_integral(_Tp __val) { return __val; } 4722 4723#ifndef _LIBCPP_CXX03_LANG 4724 4725template <class _Tp> 4726struct __has_operator_addressof_member_imp 4727{ 4728 template <class _Up> 4729 static auto __test(int) 4730 -> typename __select_2nd<decltype(_VSTD::declval<_Up>().operator&()), true_type>::type; 4731 template <class> 4732 static auto __test(long) -> false_type; 4733 4734 static const bool value = decltype(__test<_Tp>(0))::value; 4735}; 4736 4737template <class _Tp> 4738struct __has_operator_addressof_free_imp 4739{ 4740 template <class _Up> 4741 static auto __test(int) 4742 -> typename __select_2nd<decltype(operator&(_VSTD::declval<_Up>())), true_type>::type; 4743 template <class> 4744 static auto __test(long) -> false_type; 4745 4746 static const bool value = decltype(__test<_Tp>(0))::value; 4747}; 4748 4749template <class _Tp> 4750struct __has_operator_addressof 4751 : public integral_constant<bool, __has_operator_addressof_member_imp<_Tp>::value 4752 || __has_operator_addressof_free_imp<_Tp>::value> 4753{}; 4754 4755#endif // _LIBCPP_CXX03_LANG 4756 4757#if _LIBCPP_STD_VER > 14 4758 4759template <class...> using void_t = void; 4760 4761# ifndef _LIBCPP_HAS_NO_VARIADICS 4762template <class... _Args> 4763struct conjunction : __and_<_Args...> {}; 4764template<class... _Args> 4765_LIBCPP_INLINE_VAR constexpr bool conjunction_v 4766 = conjunction<_Args...>::value; 4767 4768template <class... _Args> 4769struct disjunction : __or_<_Args...> {}; 4770template<class... _Args> 4771_LIBCPP_INLINE_VAR constexpr bool disjunction_v 4772 = disjunction<_Args...>::value; 4773 4774template <class _Tp> 4775struct negation : __not_<_Tp> {}; 4776template<class _Tp> 4777_LIBCPP_INLINE_VAR constexpr bool negation_v 4778 = negation<_Tp>::value; 4779# endif // _LIBCPP_HAS_NO_VARIADICS 4780#endif // _LIBCPP_STD_VER > 14 4781 4782// These traits are used in __tree and __hash_table 4783#ifndef _LIBCPP_CXX03_LANG 4784struct __extract_key_fail_tag {}; 4785struct __extract_key_self_tag {}; 4786struct __extract_key_first_tag {}; 4787 4788template <class _ValTy, class _Key, 4789 class _RawValTy = typename __unconstref<_ValTy>::type> 4790struct __can_extract_key 4791 : conditional<is_same<_RawValTy, _Key>::value, __extract_key_self_tag, 4792 __extract_key_fail_tag>::type {}; 4793 4794template <class _Pair, class _Key, class _First, class _Second> 4795struct __can_extract_key<_Pair, _Key, pair<_First, _Second>> 4796 : conditional<is_same<typename remove_const<_First>::type, _Key>::value, 4797 __extract_key_first_tag, __extract_key_fail_tag>::type {}; 4798 4799// __can_extract_map_key uses true_type/false_type instead of the tags. 4800// It returns true if _Key != _ContainerValueTy (the container is a map not a set) 4801// and _ValTy == _Key. 4802template <class _ValTy, class _Key, class _ContainerValueTy, 4803 class _RawValTy = typename __unconstref<_ValTy>::type> 4804struct __can_extract_map_key 4805 : integral_constant<bool, is_same<_RawValTy, _Key>::value> {}; 4806 4807// This specialization returns __extract_key_fail_tag for non-map containers 4808// because _Key == _ContainerValueTy 4809template <class _ValTy, class _Key, class _RawValTy> 4810struct __can_extract_map_key<_ValTy, _Key, _Key, _RawValTy> 4811 : false_type {}; 4812 4813#endif 4814 4815#if _LIBCPP_STD_VER > 17 4816enum class endian 4817{ 4818 little = 0xDEAD, 4819 big = 0xFACE, 4820#if defined(_LIBCPP_LITTLE_ENDIAN) 4821 native = little 4822#elif defined(_LIBCPP_BIG_ENDIAN) 4823 native = big 4824#else 4825 native = 0xCAFE 4826#endif 4827}; 4828#endif 4829 4830_LIBCPP_END_NAMESPACE_STD 4831 4832#if _LIBCPP_STD_VER > 14 4833// std::byte 4834namespace std // purposefully not versioned 4835{ 4836template <class _Integer> 4837 constexpr typename enable_if<is_integral_v<_Integer>, byte>::type & 4838 operator<<=(byte& __lhs, _Integer __shift) noexcept 4839 { return __lhs = __lhs << __shift; } 4840 4841template <class _Integer> 4842 constexpr typename enable_if<is_integral_v<_Integer>, byte>::type 4843 operator<< (byte __lhs, _Integer __shift) noexcept 4844 { return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) << __shift)); } 4845 4846template <class _Integer> 4847 constexpr typename enable_if<is_integral_v<_Integer>, byte>::type & 4848 operator>>=(byte& __lhs, _Integer __shift) noexcept 4849 { return __lhs = __lhs >> __shift; } 4850 4851template <class _Integer> 4852 constexpr typename enable_if<is_integral_v<_Integer>, byte>::type 4853 operator>> (byte __lhs, _Integer __shift) noexcept 4854 { return static_cast<byte>(static_cast<unsigned char>(static_cast<unsigned int>(__lhs) >> __shift)); } 4855 4856template <class _Integer> 4857 constexpr typename enable_if<is_integral_v<_Integer>, _Integer>::type 4858 to_integer(byte __b) noexcept { return static_cast<_Integer>(__b); } 4859 4860} 4861#endif 4862 4863#endif // _LIBCPP_TYPE_TRAITS 4864