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; 23 typedef integral_constant<bool, false> false_type; 24 25 // helper traits 26 template <bool, class T = void> struct enable_if; 27 template <bool, class T, class F> struct conditional; 28 29 // Primary classification traits: 30 template <class T> struct is_void; 31 template <class T> struct is_integral; 32 template <class T> struct is_floating_point; 33 template <class T> struct is_array; 34 template <class T> struct is_pointer; 35 template <class T> struct is_lvalue_reference; 36 template <class T> struct is_rvalue_reference; 37 template <class T> struct is_member_object_pointer; 38 template <class T> struct is_member_function_pointer; 39 template <class T> struct is_enum; 40 template <class T> struct is_union; 41 template <class T> struct is_class; 42 template <class T> struct is_function; 43 44 // Secondary classification traits: 45 template <class T> struct is_reference; 46 template <class T> struct is_arithmetic; 47 template <class T> struct is_fundamental; 48 template <class T> struct is_member_pointer; 49 template <class T> struct is_scalar; 50 template <class T> struct is_object; 51 template <class T> struct is_compound; 52 53 // Const-volatile properties and transformations: 54 template <class T> struct is_const; 55 template <class T> struct is_volatile; 56 template <class T> struct remove_const; 57 template <class T> struct remove_volatile; 58 template <class T> struct remove_cv; 59 template <class T> struct add_const; 60 template <class T> struct add_volatile; 61 template <class T> struct add_cv; 62 63 // Reference transformations: 64 template <class T> struct remove_reference; 65 template <class T> struct add_lvalue_reference; 66 template <class T> struct add_rvalue_reference; 67 68 // Pointer transformations: 69 template <class T> struct remove_pointer; 70 template <class T> struct add_pointer; 71 72 // Integral properties: 73 template <class T> struct is_signed; 74 template <class T> struct is_unsigned; 75 template <class T> struct make_signed; 76 template <class T> struct make_unsigned; 77 78 // Array properties and transformations: 79 template <class T> struct rank; 80 template <class T, unsigned I = 0> struct extent; 81 template <class T> struct remove_extent; 82 template <class T> struct remove_all_extents; 83 84 // Member introspection: 85 template <class T> struct is_pod; 86 template <class T> struct is_trivial; 87 template <class T> struct is_trivially_copyable; 88 template <class T> struct is_standard_layout; 89 template <class T> struct is_literal_type; 90 template <class T> struct is_empty; 91 template <class T> struct is_polymorphic; 92 template <class T> struct is_abstract; 93 94 template <class T, class... Args> struct is_constructible; 95 template <class T> struct is_default_constructible; 96 template <class T> struct is_copy_constructible; 97 template <class T> struct is_move_constructible; 98 template <class T, class U> struct is_assignable; 99 template <class T> struct is_copy_assignable; 100 template <class T> struct is_move_assignable; 101 template <class T> struct is_destructible; 102 103 template <class T, class... Args> struct is_trivially_constructible; 104 template <class T> struct is_trivially_default_constructible; 105 template <class T> struct is_trivially_copy_constructible; 106 template <class T> struct is_trivially_move_constructible; 107 template <class T, class U> struct is_trivially_assignable; 108 template <class T> struct is_trivially_copy_assignable; 109 template <class T> struct is_trivially_move_assignable; 110 template <class T> struct is_trivially_destructible; 111 112 template <class T, class... Args> struct is_nothrow_constructible; 113 template <class T> struct is_nothrow_default_constructible; 114 template <class T> struct is_nothrow_copy_constructible; 115 template <class T> struct is_nothrow_move_constructible; 116 template <class T, class U> struct is_nothrow_assignable; 117 template <class T> struct is_nothrow_copy_assignable; 118 template <class T> struct is_nothrow_move_assignable; 119 template <class T> struct is_nothrow_destructible; 120 121 template <class T> struct has_virtual_destructor; 122 123 // Relationships between types: 124 template <class T, class U> struct is_same; 125 template <class Base, class Derived> struct is_base_of; 126 template <class From, class To> struct is_convertible; 127 128 // Alignment properties and transformations: 129 template <class T> struct alignment_of; 130 template <size_t Len, size_t Align = most_stringent_alignment_requirement> 131 struct aligned_storage; 132 133 template <class T> struct decay; 134 template <class... T> struct common_type; 135 template <class T> struct underlying_type; 136 template <class> class result_of; // undefined 137 template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; 138 139} // std 140 141*/ 142#include <__config> 143#include <cstddef> 144 145#pragma GCC system_header 146 147_LIBCPP_BEGIN_NAMESPACE_STD 148 149template <bool _B, class _If, class _Then> 150 struct _LIBCPP_VISIBLE conditional {typedef _If type;}; 151template <class _If, class _Then> 152 struct _LIBCPP_VISIBLE conditional<false, _If, _Then> {typedef _Then type;}; 153 154template <bool, class _Tp = void> struct _LIBCPP_VISIBLE enable_if {}; 155template <class _Tp> struct _LIBCPP_VISIBLE enable_if<true, _Tp> {typedef _Tp type;}; 156 157struct __two {char _[2];}; 158 159// helper class: 160 161template <class _Tp, _Tp __v> 162struct _LIBCPP_VISIBLE integral_constant 163{ 164 static constexpr _Tp value = __v; 165 typedef _Tp value_type; 166 typedef integral_constant type; 167 _LIBCPP_INLINE_VISIBILITY 168#ifndef _LIBCPP_HAS_NO_CONSTEXPR 169 constexpr 170#endif 171 operator value_type() 172#ifdef _LIBCPP_HAS_NO_CONSTEXPR 173 const 174#endif 175 {return value;} 176}; 177 178template <class _Tp, _Tp __v> 179constexpr _Tp integral_constant<_Tp, __v>::value; 180 181typedef integral_constant<bool, true> true_type; 182typedef integral_constant<bool, false> false_type; 183 184// is_const 185 186template <class _Tp> struct _LIBCPP_VISIBLE is_const : public false_type {}; 187template <class _Tp> struct _LIBCPP_VISIBLE is_const<_Tp const> : public true_type {}; 188 189// is_volatile 190 191template <class _Tp> struct _LIBCPP_VISIBLE is_volatile : public false_type {}; 192template <class _Tp> struct _LIBCPP_VISIBLE is_volatile<_Tp volatile> : public true_type {}; 193 194// remove_const 195 196template <class _Tp> struct _LIBCPP_VISIBLE remove_const {typedef _Tp type;}; 197template <class _Tp> struct _LIBCPP_VISIBLE remove_const<const _Tp> {typedef _Tp type;}; 198 199// remove_volatile 200 201template <class _Tp> struct _LIBCPP_VISIBLE remove_volatile {typedef _Tp type;}; 202template <class _Tp> struct _LIBCPP_VISIBLE remove_volatile<volatile _Tp> {typedef _Tp type;}; 203 204// remove_cv 205 206template <class _Tp> struct _LIBCPP_VISIBLE remove_cv 207{typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;}; 208 209// is_void 210 211template <class _Tp> struct __is_void : public false_type {}; 212template <> struct __is_void<void> : public true_type {}; 213 214template <class _Tp> struct _LIBCPP_VISIBLE is_void 215 : public __is_void<typename remove_cv<_Tp>::type> {}; 216 217// __is_nullptr_t 218 219template <class _Tp> struct ____is_nullptr_t : public false_type {}; 220template <> struct ____is_nullptr_t<nullptr_t> : public true_type {}; 221 222template <class _Tp> struct _LIBCPP_VISIBLE __is_nullptr_t 223 : public ____is_nullptr_t<typename remove_cv<_Tp>::type> {}; 224 225// is_integral 226 227template <class _Tp> struct __is_integral : public false_type {}; 228template <> struct __is_integral<bool> : public true_type {}; 229template <> struct __is_integral<char> : public true_type {}; 230template <> struct __is_integral<signed char> : public true_type {}; 231template <> struct __is_integral<unsigned char> : public true_type {}; 232template <> struct __is_integral<wchar_t> : public true_type {}; 233#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 234template <> struct __is_integral<char16_t> : public true_type {}; 235template <> struct __is_integral<char32_t> : public true_type {}; 236#endif // _LIBCPP_HAS_NO_UNICODE_CHARS 237template <> struct __is_integral<short> : public true_type {}; 238template <> struct __is_integral<unsigned short> : public true_type {}; 239template <> struct __is_integral<int> : public true_type {}; 240template <> struct __is_integral<unsigned int> : public true_type {}; 241template <> struct __is_integral<long> : public true_type {}; 242template <> struct __is_integral<unsigned long> : public true_type {}; 243template <> struct __is_integral<long long> : public true_type {}; 244template <> struct __is_integral<unsigned long long> : public true_type {}; 245 246template <class _Tp> struct _LIBCPP_VISIBLE is_integral 247 : public __is_integral<typename remove_cv<_Tp>::type> {}; 248 249// is_floating_point 250 251template <class _Tp> struct __is_floating_point : public false_type {}; 252template <> struct __is_floating_point<float> : public true_type {}; 253template <> struct __is_floating_point<double> : public true_type {}; 254template <> struct __is_floating_point<long double> : public true_type {}; 255 256template <class _Tp> struct _LIBCPP_VISIBLE is_floating_point 257 : public __is_floating_point<typename remove_cv<_Tp>::type> {}; 258 259// is_array 260 261template <class _Tp> struct _LIBCPP_VISIBLE is_array 262 : public false_type {}; 263template <class _Tp> struct _LIBCPP_VISIBLE is_array<_Tp[]> 264 : public true_type {}; 265template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE is_array<_Tp[_Np]> 266 : public true_type {}; 267 268// is_pointer 269 270template <class _Tp> struct __is_pointer : public false_type {}; 271template <class _Tp> struct __is_pointer<_Tp*> : public true_type {}; 272 273template <class _Tp> struct _LIBCPP_VISIBLE is_pointer 274 : public __is_pointer<typename remove_cv<_Tp>::type> {}; 275 276// is_reference 277 278template <class _Tp> struct _LIBCPP_VISIBLE is_lvalue_reference : public false_type {}; 279template <class _Tp> struct _LIBCPP_VISIBLE is_lvalue_reference<_Tp&> : public true_type {}; 280 281template <class _Tp> struct _LIBCPP_VISIBLE is_rvalue_reference : public false_type {}; 282#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 283template <class _Tp> struct _LIBCPP_VISIBLE is_rvalue_reference<_Tp&&> : public true_type {}; 284#endif 285 286template <class _Tp> struct _LIBCPP_VISIBLE is_reference : public false_type {}; 287template <class _Tp> struct _LIBCPP_VISIBLE is_reference<_Tp&> : public true_type {}; 288#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 289template <class _Tp> struct _LIBCPP_VISIBLE is_reference<_Tp&&> : public true_type {}; 290#endif 291 292#if defined(__clang__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 293#define _LIBCPP_HAS_TYPE_TRAITS 294#endif 295 296// is_union 297 298#if __has_feature(is_union) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 299 300template <class _Tp> struct _LIBCPP_VISIBLE is_union 301 : public integral_constant<bool, __is_union(_Tp)> {}; 302 303#else 304 305template <class _Tp> struct __libcpp_union : public false_type {}; 306template <class _Tp> struct _LIBCPP_VISIBLE is_union 307 : public __libcpp_union<typename remove_cv<_Tp>::type> {}; 308 309#endif 310 311// is_class 312 313#if __has_feature(is_class) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 314 315template <class _Tp> struct _LIBCPP_VISIBLE is_class 316 : public integral_constant<bool, __is_class(_Tp)> {}; 317 318#else 319 320namespace __is_class_imp 321{ 322template <class _Tp> char __test(int _Tp::*); 323template <class _Tp> __two __test(...); 324} 325 326template <class _Tp> struct _LIBCPP_VISIBLE is_class 327 : public integral_constant<bool, sizeof(__is_class_imp::__test<_Tp>(0)) == 1 && !is_union<_Tp>::value> {}; 328 329#endif 330 331// is_same 332 333template <class _Tp, class _Up> struct _LIBCPP_VISIBLE is_same : public false_type {}; 334template <class _Tp> struct _LIBCPP_VISIBLE is_same<_Tp, _Tp> : public true_type {}; 335 336// is_function 337 338namespace __is_function_imp 339{ 340template <class _Tp> char __test(_Tp*); 341template <class _Tp> __two __test(...); 342template <class _Tp> _Tp& __source(); 343} 344 345template <class _Tp, bool = is_class<_Tp>::value || 346 is_union<_Tp>::value || 347 is_void<_Tp>::value || 348 is_reference<_Tp>::value || 349 is_same<_Tp, nullptr_t>::value > 350struct __is_function 351 : public integral_constant<bool, sizeof(__is_function_imp::__test<_Tp>(__is_function_imp::__source<_Tp>())) == 1> 352 {}; 353template <class _Tp> struct __is_function<_Tp, true> : public false_type {}; 354 355template <class _Tp> struct _LIBCPP_VISIBLE is_function 356 : public __is_function<_Tp> {}; 357 358// is_member_function_pointer 359 360template <class _Tp> struct __is_member_function_pointer : public false_type {}; 361template <class _Tp, class _Up> struct __is_member_function_pointer<_Tp _Up::*> : public is_function<_Tp> {}; 362 363template <class _Tp> struct _LIBCPP_VISIBLE is_member_function_pointer 364 : public __is_member_function_pointer<typename remove_cv<_Tp>::type> {}; 365 366// is_member_pointer 367 368template <class _Tp> struct __is_member_pointer : public false_type {}; 369template <class _Tp, class _Up> struct __is_member_pointer<_Tp _Up::*> : public true_type {}; 370 371template <class _Tp> struct _LIBCPP_VISIBLE is_member_pointer 372 : public __is_member_pointer<typename remove_cv<_Tp>::type> {}; 373 374// is_member_object_pointer 375 376template <class _Tp> struct _LIBCPP_VISIBLE is_member_object_pointer 377 : public integral_constant<bool, is_member_pointer<_Tp>::value && 378 !is_member_function_pointer<_Tp>::value> {}; 379 380// is_enum 381 382#if __has_feature(is_enum) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 383 384template <class _Tp> struct _LIBCPP_VISIBLE is_enum 385 : public integral_constant<bool, __is_enum(_Tp)> {}; 386 387#else 388 389template <class _Tp> struct _LIBCPP_VISIBLE is_enum 390 : public integral_constant<bool, !is_void<_Tp>::value && 391 !is_integral<_Tp>::value && 392 !is_floating_point<_Tp>::value && 393 !is_array<_Tp>::value && 394 !is_pointer<_Tp>::value && 395 !is_reference<_Tp>::value && 396 !is_member_pointer<_Tp>::value && 397 !is_union<_Tp>::value && 398 !is_class<_Tp>::value && 399 !is_function<_Tp>::value > {}; 400 401#endif 402 403// is_arithmetic 404 405template <class _Tp> struct _LIBCPP_VISIBLE is_arithmetic 406 : public integral_constant<bool, is_integral<_Tp>::value || 407 is_floating_point<_Tp>::value> {}; 408 409// is_fundamental 410 411template <class _Tp> struct _LIBCPP_VISIBLE is_fundamental 412 : public integral_constant<bool, is_void<_Tp>::value || 413 __is_nullptr_t<_Tp>::value || 414 is_arithmetic<_Tp>::value> {}; 415 416// is_scalar 417 418template <class _Tp> struct _LIBCPP_VISIBLE is_scalar 419 : public integral_constant<bool, is_arithmetic<_Tp>::value || 420 is_member_pointer<_Tp>::value || 421 is_pointer<_Tp>::value || 422 __is_nullptr_t<_Tp>::value || 423 is_enum<_Tp>::value > {}; 424 425template <> struct _LIBCPP_VISIBLE is_scalar<nullptr_t> : public true_type {}; 426 427// is_object 428 429template <class _Tp> struct _LIBCPP_VISIBLE is_object 430 : public integral_constant<bool, is_scalar<_Tp>::value || 431 is_array<_Tp>::value || 432 is_union<_Tp>::value || 433 is_class<_Tp>::value > {}; 434 435// is_compound 436 437template <class _Tp> struct _LIBCPP_VISIBLE is_compound 438 : public integral_constant<bool, !is_fundamental<_Tp>::value> {}; 439 440// add_const 441 442template <class _Tp, bool = is_reference<_Tp>::value || 443 is_function<_Tp>::value || 444 is_const<_Tp>::value > 445struct __add_const {typedef _Tp type;}; 446 447template <class _Tp> 448struct __add_const<_Tp, false> {typedef const _Tp type;}; 449 450template <class _Tp> struct _LIBCPP_VISIBLE add_const 451 {typedef typename __add_const<_Tp>::type type;}; 452 453// add_volatile 454 455template <class _Tp, bool = is_reference<_Tp>::value || 456 is_function<_Tp>::value || 457 is_volatile<_Tp>::value > 458struct __add_volatile {typedef _Tp type;}; 459 460template <class _Tp> 461struct __add_volatile<_Tp, false> {typedef volatile _Tp type;}; 462 463template <class _Tp> struct _LIBCPP_VISIBLE add_volatile 464 {typedef typename __add_volatile<_Tp>::type type;}; 465 466// add_cv 467 468template <class _Tp> struct _LIBCPP_VISIBLE add_cv 469 {typedef typename add_const<typename add_volatile<_Tp>::type>::type type;}; 470 471// remove_reference 472 473template <class _Tp> struct _LIBCPP_VISIBLE remove_reference {typedef _Tp type;}; 474template <class _Tp> struct _LIBCPP_VISIBLE remove_reference<_Tp&> {typedef _Tp type;}; 475#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 476template <class _Tp> struct _LIBCPP_VISIBLE remove_reference<_Tp&&> {typedef _Tp type;}; 477#endif 478 479// add_lvalue_reference 480 481template <class _Tp> struct _LIBCPP_VISIBLE add_lvalue_reference {typedef _Tp& type;}; 482template <class _Tp> struct _LIBCPP_VISIBLE add_lvalue_reference<_Tp&> {typedef _Tp& type;}; // for older compiler 483template <> struct _LIBCPP_VISIBLE add_lvalue_reference<void> {typedef void type;}; 484template <> struct _LIBCPP_VISIBLE add_lvalue_reference<const void> {typedef const void type;}; 485template <> struct _LIBCPP_VISIBLE add_lvalue_reference<volatile void> {typedef volatile void type;}; 486template <> struct _LIBCPP_VISIBLE add_lvalue_reference<const volatile void> {typedef const volatile void type;}; 487 488#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 489 490template <class _Tp> struct _LIBCPP_VISIBLE add_rvalue_reference {typedef _Tp&& type;}; 491template <> struct _LIBCPP_VISIBLE add_rvalue_reference<void> {typedef void type;}; 492template <> struct _LIBCPP_VISIBLE add_rvalue_reference<const void> {typedef const void type;}; 493template <> struct _LIBCPP_VISIBLE add_rvalue_reference<volatile void> {typedef volatile void type;}; 494template <> struct _LIBCPP_VISIBLE add_rvalue_reference<const volatile void> {typedef const volatile void type;}; 495 496#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 497 498#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 499 500template <class _Tp> 501typename add_rvalue_reference<_Tp>::type 502declval() _NOEXCEPT; 503 504#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 505 506template <class _Tp> 507typename add_lvalue_reference<_Tp>::type 508declval(); 509 510#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 511 512struct __any 513{ 514 __any(...); 515}; 516 517// remove_pointer 518 519template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer {typedef _Tp type;}; 520template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp*> {typedef _Tp type;}; 521template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp* const> {typedef _Tp type;}; 522template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp* volatile> {typedef _Tp type;}; 523template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp* const volatile> {typedef _Tp type;}; 524 525// add_pointer 526 527template <class _Tp> struct _LIBCPP_VISIBLE add_pointer 528 {typedef typename remove_reference<_Tp>::type* type;}; 529 530// is_signed 531 532template <class _Tp, bool = is_integral<_Tp>::value> 533struct ___is_signed : public integral_constant<bool, _Tp(-1) < _Tp(0)> {}; 534 535template <class _Tp> 536struct ___is_signed<_Tp, false> : public true_type {}; // floating point 537 538template <class _Tp, bool = is_arithmetic<_Tp>::value> 539struct __is_signed : public ___is_signed<_Tp> {}; 540 541template <class _Tp> struct __is_signed<_Tp, false> : public false_type {}; 542 543template <class _Tp> struct _LIBCPP_VISIBLE is_signed : public __is_signed<_Tp> {}; 544 545// is_unsigned 546 547template <class _Tp, bool = is_integral<_Tp>::value> 548struct ___is_unsigned : public integral_constant<bool, _Tp(0) < _Tp(-1)> {}; 549 550template <class _Tp> 551struct ___is_unsigned<_Tp, false> : public false_type {}; // floating point 552 553template <class _Tp, bool = is_arithmetic<_Tp>::value> 554struct __is_unsigned : public ___is_unsigned<_Tp> {}; 555 556template <class _Tp> struct __is_unsigned<_Tp, false> : public false_type {}; 557 558template <class _Tp> struct _LIBCPP_VISIBLE is_unsigned : public __is_unsigned<_Tp> {}; 559 560// rank 561 562template <class _Tp> struct _LIBCPP_VISIBLE rank 563 : public integral_constant<size_t, 0> {}; 564template <class _Tp> struct _LIBCPP_VISIBLE rank<_Tp[]> 565 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 566template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE rank<_Tp[_Np]> 567 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 568 569// extent 570 571template <class _Tp, unsigned _Ip = 0> struct _LIBCPP_VISIBLE extent 572 : public integral_constant<size_t, 0> {}; 573template <class _Tp> struct _LIBCPP_VISIBLE extent<_Tp[], 0> 574 : public integral_constant<size_t, 0> {}; 575template <class _Tp, unsigned _Ip> struct _LIBCPP_VISIBLE extent<_Tp[], _Ip> 576 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 577template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE extent<_Tp[_Np], 0> 578 : public integral_constant<size_t, _Np> {}; 579template <class _Tp, size_t _Np, unsigned _Ip> struct _LIBCPP_VISIBLE extent<_Tp[_Np], _Ip> 580 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 581 582// remove_extent 583 584template <class _Tp> struct _LIBCPP_VISIBLE remove_extent 585 {typedef _Tp type;}; 586template <class _Tp> struct _LIBCPP_VISIBLE remove_extent<_Tp[]> 587 {typedef _Tp type;}; 588template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE remove_extent<_Tp[_Np]> 589 {typedef _Tp type;}; 590 591// remove_all_extents 592 593template <class _Tp> struct _LIBCPP_VISIBLE remove_all_extents 594 {typedef _Tp type;}; 595template <class _Tp> struct _LIBCPP_VISIBLE remove_all_extents<_Tp[]> 596 {typedef typename remove_all_extents<_Tp>::type type;}; 597template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE remove_all_extents<_Tp[_Np]> 598 {typedef typename remove_all_extents<_Tp>::type type;}; 599 600// is_abstract 601 602namespace __is_abstract_imp 603{ 604template <class _Tp> char __test(_Tp (*)[1]); 605template <class _Tp> __two __test(...); 606} 607 608template <class _Tp, bool = is_class<_Tp>::value> 609struct __libcpp_abstract : public integral_constant<bool, sizeof(__is_abstract_imp::__test<_Tp>(0)) != 1> {}; 610 611template <class _Tp> struct __libcpp_abstract<_Tp, false> : public false_type {}; 612 613template <class _Tp> struct _LIBCPP_VISIBLE is_abstract : public __libcpp_abstract<_Tp> {}; 614 615// is_convertible 616 617#if __has_feature(is_convertible_to) 618 619template <class _T1, class _T2> struct _LIBCPP_VISIBLE is_convertible 620 : public integral_constant<bool, __is_convertible_to(_T1, _T2)> {}; 621 622#else // __has_feature(is_convertible_to) 623 624namespace __is_convertible_imp 625{ 626#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 627template <class _Tp> char __test(const volatile typename remove_reference<_Tp>::type&&); 628#else 629template <class _Tp> char __test(_Tp); 630#endif 631template <class _Tp> __two __test(...); 632#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 633template <class _Tp> _Tp&& __source(); 634#else 635template <class _Tp> typename remove_reference<_Tp>::type& __source(); 636#endif 637 638template <class _Tp, bool _IsArray = is_array<_Tp>::value, 639 bool _IsFunction = is_function<_Tp>::value, 640 bool _IsVoid = is_void<_Tp>::value> 641 struct __is_array_function_or_void {enum {value = 0};}; 642template <class _Tp> struct __is_array_function_or_void<_Tp, true, false, false> {enum {value = 1};}; 643template <class _Tp> struct __is_array_function_or_void<_Tp, false, true, false> {enum {value = 2};}; 644template <class _Tp> struct __is_array_function_or_void<_Tp, false, false, true> {enum {value = 3};}; 645} 646 647template <class _Tp, 648 unsigned = __is_convertible_imp::__is_array_function_or_void<typename remove_reference<_Tp>::type>::value> 649struct __is_convertible_check 650{ 651 static const size_t __v = 0; 652}; 653 654template <class _Tp> 655struct __is_convertible_check<_Tp, 0> 656{ 657 static const size_t __v = sizeof(_Tp); 658}; 659 660template <class _T1, class _T2, 661 unsigned _T1_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T1>::value, 662 unsigned _T2_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T2>::value> 663struct __is_convertible 664 : public integral_constant<bool, 665 sizeof(__is_convertible_imp::__test<_T2>(__is_convertible_imp::__source<_T1>())) == 1 666 > 667{}; 668 669template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 0> : false_type {}; 670 671template <class _T1> struct __is_convertible<_T1, const _T1&, 1, 0> : true_type {}; 672#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 673template <class _T1> struct __is_convertible<_T1, _T1&&, 1, 0> : true_type {}; 674template <class _T1> struct __is_convertible<_T1, const _T1&&, 1, 0> : true_type {}; 675template <class _T1> struct __is_convertible<_T1, volatile _T1&&, 1, 0> : true_type {}; 676template <class _T1> struct __is_convertible<_T1, const volatile _T1&&, 1, 0> : true_type {}; 677#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 678 679template <class _T1, class _T2> struct __is_convertible<_T1, _T2*, 1, 0> 680 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*>::value> {}; 681 682template <class _T1, class _T2> struct __is_convertible<_T1, _T2* const, 1, 0> 683 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*const>::value> {}; 684 685template <class _T1, class _T2> struct __is_convertible<_T1, _T2* volatile, 1, 0> 686 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*volatile>::value> {}; 687 688template <class _T1, class _T2> struct __is_convertible<_T1, _T2* const volatile, 1, 0> 689 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*const volatile>::value> {}; 690 691template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 0> : public false_type {}; 692#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 693template <class _T1> struct __is_convertible<_T1, _T1&&, 2, 0> : public true_type {}; 694#endif 695template <class _T1> struct __is_convertible<_T1, _T1*, 2, 0> : public true_type {}; 696template <class _T1> struct __is_convertible<_T1, _T1*const, 2, 0> : public true_type {}; 697template <class _T1> struct __is_convertible<_T1, _T1*volatile, 2, 0> : public true_type {}; 698template <class _T1> struct __is_convertible<_T1, _T1*const volatile, 2, 0> : public true_type {}; 699 700template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 0> : public false_type {}; 701 702template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 1> : public false_type {}; 703template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 1> : public false_type {}; 704template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 1> : public false_type {}; 705template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 1> : public false_type {}; 706 707template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 2> : public false_type {}; 708template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 2> : public false_type {}; 709template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 2> : public false_type {}; 710template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 2> : public false_type {}; 711 712template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 3> : public false_type {}; 713template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 3> : public false_type {}; 714template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 3> : public false_type {}; 715template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 3> : public true_type {}; 716 717template <class _T1, class _T2> struct _LIBCPP_VISIBLE is_convertible 718 : public __is_convertible<_T1, _T2> 719{ 720 static const size_t __complete_check1 = __is_convertible_check<_T1>::__v; 721 static const size_t __complete_check2 = __is_convertible_check<_T2>::__v; 722}; 723 724#endif // __has_feature(is_convertible_to) 725 726// is_base_of 727 728#ifdef _LIBCP_HAS_IS_BASE_OF 729 730template <class _Bp, class _Dp> 731struct _LIBCPP_VISIBLE is_base_of 732 : public integral_constant<bool, __is_base_of(_Bp, _Dp)> {}; 733 734#else // __has_feature(is_base_of) 735 736#error is_base_of not implemented. 737 738#endif // __has_feature(is_base_of) 739 740// is_empty 741 742template <class _Tp> 743struct __is_empty1 744 : public _Tp 745{ 746 double _; 747}; 748 749struct __is_empty2 750{ 751 double _; 752}; 753 754template <class _Tp, bool = is_class<_Tp>::value> 755struct __libcpp_empty : public integral_constant<bool, sizeof(__is_empty1<_Tp>) == sizeof(__is_empty2)> {}; 756 757template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {}; 758 759template <class _Tp> struct _LIBCPP_VISIBLE is_empty : public __libcpp_empty<_Tp> {}; 760 761// is_polymorphic 762 763template <class _Tp> struct __is_polymorphic1 : public _Tp {}; 764template <class _Tp> struct __is_polymorphic2 : public _Tp {virtual ~__is_polymorphic2() throw();}; 765 766template <class _Tp, bool = is_class<_Tp>::value> 767struct __libcpp_polymorphic 768 : public integral_constant<bool, sizeof(__is_polymorphic1<_Tp>) == sizeof(__is_polymorphic2<_Tp>)> {}; 769 770template <class _Tp> struct __libcpp_polymorphic<_Tp, false> : public false_type {}; 771 772template <class _Tp> struct _LIBCPP_VISIBLE is_polymorphic 773 : public __libcpp_polymorphic<_Tp> {}; 774 775// has_virtual_destructor 776 777#if __has_feature(has_virtual_destructor) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 778 779template <class _Tp> struct _LIBCPP_VISIBLE has_virtual_destructor 780 : public integral_constant<bool, __has_virtual_destructor(_Tp)> {}; 781 782#else // _LIBCPP_HAS_TYPE_TRAITS 783 784template <class _Tp> struct _LIBCPP_VISIBLE has_virtual_destructor 785 : public false_type {}; 786 787#endif // _LIBCPP_HAS_TYPE_TRAITS 788 789// alignment_of 790 791template <class _Tp> struct __alignment_of {_Tp _;}; 792 793template <class _Tp> struct _LIBCPP_VISIBLE alignment_of 794 : public integral_constant<size_t, __alignof__(__alignment_of<typename remove_all_extents<_Tp>::type>)> {}; 795 796// aligned_storage 797 798template <class _Hp, class _Tp> 799struct __type_list 800{ 801 typedef _Hp _Head; 802 typedef _Tp _Tail; 803}; 804 805struct __nat 806{ 807#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS 808 __nat() = delete; 809 __nat(const __nat&) = delete; 810 __nat& operator=(const __nat&) = delete; 811 ~__nat() = delete; 812#endif 813}; 814 815template <class _Tp> 816struct __align_type 817{ 818 static const size_t value = alignment_of<_Tp>::value; 819 typedef _Tp type; 820}; 821 822struct __struct_double {long double _;}; 823struct __struct_double4 {double _[4];}; 824 825typedef 826 __type_list<__align_type<unsigned char>, 827 __type_list<__align_type<unsigned short>, 828 __type_list<__align_type<unsigned int>, 829 __type_list<__align_type<unsigned long>, 830 __type_list<__align_type<unsigned long long>, 831 __type_list<__align_type<double>, 832 __type_list<__align_type<long double>, 833 __type_list<__align_type<__struct_double>, 834 __type_list<__align_type<__struct_double4>, 835 __type_list<__align_type<int*>, 836 __nat 837 > > > > > > > > > > __all_types; 838 839template <class _TL, size_t _Align> struct __find_pod; 840 841template <class _Hp, size_t _Align> 842struct __find_pod<__type_list<_Hp, __nat>, _Align> 843{ 844 typedef typename conditional< 845 _Align == _Hp::value, 846 typename _Hp::type, 847 void 848 >::type type; 849}; 850 851template <class _Hp, class _Tp, size_t _Align> 852struct __find_pod<__type_list<_Hp, _Tp>, _Align> 853{ 854 typedef typename conditional< 855 _Align == _Hp::value, 856 typename _Hp::type, 857 typename __find_pod<_Tp, _Align>::type 858 >::type type; 859}; 860 861template <class _TL, size_t _Len> struct __find_max_align; 862 863template <class _Hp, size_t _Len> 864struct __find_max_align<__type_list<_Hp, __nat>, _Len> : public integral_constant<size_t, _Hp::value> {}; 865 866template <size_t _Len, size_t _A1, size_t _A2> 867struct __select_align 868{ 869private: 870 static const size_t __min = _A2 < _A1 ? _A2 : _A1; 871 static const size_t __max = _A1 < _A2 ? _A2 : _A1; 872public: 873 static const size_t value = _Len < __max ? __min : __max; 874}; 875 876template <class _Hp, class _Tp, size_t _Len> 877struct __find_max_align<__type_list<_Hp, _Tp>, _Len> 878 : public integral_constant<size_t, __select_align<_Len, _Hp::value, __find_max_align<_Tp, _Len>::value>::value> {}; 879 880template <size_t _Len, const size_t _Align = __find_max_align<__all_types, _Len>::value> 881struct _LIBCPP_VISIBLE aligned_storage 882{ 883 typedef typename __find_pod<__all_types, _Align>::type _Aligner; 884 static_assert(!is_void<_Aligner>::value, ""); 885 union type 886 { 887 _Aligner __align; 888 unsigned char __data[_Len]; 889 }; 890}; 891 892#define _CREATE_ALIGNED_STORAGE_SPECIALIZATION(n) \ 893template <size_t _Len>\ 894struct __attribute__ ((__visibility__("default"))) aligned_storage<_Len, n>\ 895{\ 896 struct type\ 897 {\ 898 unsigned char _[_Len];\ 899 } __attribute__((__aligned__(n)));\ 900} 901 902_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1); 903_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2); 904_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4); 905_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x8); 906_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x10); 907_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x20); 908_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x40); 909_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x80); 910_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x100); 911_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x200); 912_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x400); 913_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800); 914_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000); 915_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000); 916_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000); 917 918#undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION 919 920// __promote 921 922template <class _A1, class _A2 = void, class _A3 = void, 923 bool = (is_arithmetic<_A1>::value || is_void<_A1>::value) && 924 (is_arithmetic<_A2>::value || is_void<_A2>::value) && 925 (is_arithmetic<_A3>::value || is_void<_A3>::value)> 926class __promote {}; 927 928template <class _A1, class _A2, class _A3> 929class __promote<_A1, _A2, _A3, true> 930{ 931private: 932 typedef typename __promote<_A1>::type __type1; 933 typedef typename __promote<_A2>::type __type2; 934 typedef typename __promote<_A3>::type __type3; 935public: 936 typedef __typeof__(__type1() + __type2() + __type3()) type; 937}; 938 939template <class _A1, class _A2> 940class __promote<_A1, _A2, void, true> 941{ 942private: 943 typedef typename __promote<_A1>::type __type1; 944 typedef typename __promote<_A2>::type __type2; 945public: 946 typedef __typeof__(__type1() + __type2()) type; 947}; 948 949template <class _A1> 950class __promote<_A1, void, void, true> 951{ 952public: 953 typedef typename conditional<is_arithmetic<_A1>::value, 954 typename conditional<is_integral<_A1>::value, double, _A1>::type, 955 void 956 >::type type; 957}; 958 959#ifdef _LIBCPP_STORE_AS_OPTIMIZATION 960 961// __transform 962 963template <class _Tp, size_t = sizeof(_Tp), bool = is_scalar<_Tp>::value> struct __transform {typedef _Tp type;}; 964template <class _Tp> struct __transform<_Tp, 1, true> {typedef unsigned char type;}; 965template <class _Tp> struct __transform<_Tp, 2, true> {typedef unsigned short type;}; 966template <class _Tp> struct __transform<_Tp, 4, true> {typedef unsigned int type;}; 967template <class _Tp> struct __transform<_Tp, 8, true> {typedef unsigned long long type;}; 968 969#endif // _LIBCPP_STORE_AS_OPTIMIZATION 970 971// make_signed / make_unsigned 972 973typedef 974 __type_list<signed char, 975 __type_list<signed short, 976 __type_list<signed int, 977 __type_list<signed long, 978 __type_list<signed long long, 979 __nat 980 > > > > > __signed_types; 981 982typedef 983 __type_list<unsigned char, 984 __type_list<unsigned short, 985 __type_list<unsigned int, 986 __type_list<unsigned long, 987 __type_list<unsigned long long, 988 __nat 989 > > > > > __unsigned_types; 990 991template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> struct __find_first; 992 993template <class _Hp, class _Tp, size_t _Size> 994struct __find_first<__type_list<_Hp, _Tp>, _Size, true> 995{ 996 typedef _Hp type; 997}; 998 999template <class _Hp, class _Tp, size_t _Size> 1000struct __find_first<__type_list<_Hp, _Tp>, _Size, false> 1001{ 1002 typedef typename __find_first<_Tp, _Size>::type type; 1003}; 1004 1005template <class _Tp, class _Up, bool = is_const<typename remove_reference<_Tp>::type>::value, 1006 bool = is_volatile<typename remove_reference<_Tp>::type>::value> 1007struct __apply_cv 1008{ 1009 typedef _Up type; 1010}; 1011 1012template <class _Tp, class _Up> 1013struct __apply_cv<_Tp, _Up, true, false> 1014{ 1015 typedef const _Up type; 1016}; 1017 1018template <class _Tp, class _Up> 1019struct __apply_cv<_Tp, _Up, false, true> 1020{ 1021 typedef volatile _Up type; 1022}; 1023 1024template <class _Tp, class _Up> 1025struct __apply_cv<_Tp, _Up, true, true> 1026{ 1027 typedef const volatile _Up type; 1028}; 1029 1030template <class _Tp, class _Up> 1031struct __apply_cv<_Tp&, _Up, false, false> 1032{ 1033 typedef _Up& type; 1034}; 1035 1036template <class _Tp, class _Up> 1037struct __apply_cv<_Tp&, _Up, true, false> 1038{ 1039 typedef const _Up& type; 1040}; 1041 1042template <class _Tp, class _Up> 1043struct __apply_cv<_Tp&, _Up, false, true> 1044{ 1045 typedef volatile _Up& type; 1046}; 1047 1048template <class _Tp, class _Up> 1049struct __apply_cv<_Tp&, _Up, true, true> 1050{ 1051 typedef const volatile _Up& type; 1052}; 1053 1054template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 1055struct __make_signed {}; 1056 1057template <class _Tp> 1058struct __make_signed<_Tp, true> 1059{ 1060 typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; 1061}; 1062 1063template <> struct __make_signed<bool, true> {}; 1064template <> struct __make_signed< signed short, true> {typedef short type;}; 1065template <> struct __make_signed<unsigned short, true> {typedef short type;}; 1066template <> struct __make_signed< signed int, true> {typedef int type;}; 1067template <> struct __make_signed<unsigned int, true> {typedef int type;}; 1068template <> struct __make_signed< signed long, true> {typedef long type;}; 1069template <> struct __make_signed<unsigned long, true> {typedef long type;}; 1070template <> struct __make_signed< signed long long, true> {typedef long long type;}; 1071template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; 1072 1073template <class _Tp> 1074struct _LIBCPP_VISIBLE make_signed 1075{ 1076 typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; 1077}; 1078 1079template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 1080struct __make_unsigned {}; 1081 1082template <class _Tp> 1083struct __make_unsigned<_Tp, true> 1084{ 1085 typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type; 1086}; 1087 1088template <> struct __make_unsigned<bool, true> {}; 1089template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;}; 1090template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;}; 1091template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;}; 1092template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;}; 1093template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;}; 1094template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;}; 1095template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;}; 1096template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;}; 1097 1098template <class _Tp> 1099struct _LIBCPP_VISIBLE make_unsigned 1100{ 1101 typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type; 1102}; 1103 1104#ifdef _LIBCPP_HAS_NO_VARIADICS 1105 1106template <class _Tp, class _Up = void, class V = void> 1107struct _LIBCPP_VISIBLE common_type 1108{ 1109public: 1110 typedef typename common_type<typename common_type<_Tp, _Up>::type, V>::type type; 1111}; 1112 1113template <class _Tp> 1114struct _LIBCPP_VISIBLE common_type<_Tp, void, void> 1115{ 1116public: 1117 typedef _Tp type; 1118}; 1119 1120template <class _Tp, class _Up> 1121struct _LIBCPP_VISIBLE common_type<_Tp, _Up, void> 1122{ 1123private: 1124#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1125 static _Tp&& __t(); 1126 static _Up&& __u(); 1127#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1128 static _Tp __t(); 1129 static _Up __u(); 1130#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1131public: 1132 typedef decltype(true ? __t() : __u()) type; 1133}; 1134 1135#else // _LIBCPP_HAS_NO_VARIADICS 1136 1137template <class ..._Tp> struct common_type; 1138 1139template <class _Tp> 1140struct _LIBCPP_VISIBLE common_type<_Tp> 1141{ 1142 typedef _Tp type; 1143}; 1144 1145template <class _Tp, class _Up> 1146struct _LIBCPP_VISIBLE common_type<_Tp, _Up> 1147{ 1148private: 1149 static _Tp&& __t(); 1150 static _Up&& __u(); 1151 static bool __f(); 1152public: 1153 typedef decltype(__f() ? __t() : __u()) type; 1154}; 1155 1156template <class _Tp, class _Up, class ..._Vp> 1157struct _LIBCPP_VISIBLE common_type<_Tp, _Up, _Vp...> 1158{ 1159 typedef typename common_type<typename common_type<_Tp, _Up>::type, _Vp...>::type type; 1160}; 1161 1162#endif // _LIBCPP_HAS_NO_VARIADICS 1163 1164// is_assignable 1165 1166template <class _Tp, class _Arg> 1167decltype((_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>(), true_type())) 1168#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1169__is_assignable_test(_Tp&&, _Arg&&); 1170#else 1171__is_assignable_test(_Tp, _Arg&); 1172#endif 1173 1174template <class _Arg> 1175false_type 1176#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1177__is_assignable_test(__any, _Arg&&); 1178#else 1179__is_assignable_test(__any, _Arg&); 1180#endif 1181 1182template <class _Tp, class _Arg, bool = is_void<_Tp>::value || is_void<_Arg>::value> 1183struct __is_assignable_imp 1184 : public common_type 1185 < 1186 decltype(__is_assignable_test(declval<_Tp>(), declval<_Arg>())) 1187 >::type {}; 1188 1189template <class _Tp, class _Arg> 1190struct __is_assignable_imp<_Tp, _Arg, true> 1191 : public false_type 1192{ 1193}; 1194 1195template <class _Tp, class _Arg> 1196struct is_assignable 1197 : public __is_assignable_imp<_Tp, _Arg> {}; 1198 1199// is_copy_assignable 1200 1201template <class _Tp> struct _LIBCPP_VISIBLE is_copy_assignable 1202 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 1203 const typename add_lvalue_reference<_Tp>::type> {}; 1204 1205// is_move_assignable 1206 1207template <class _Tp> struct _LIBCPP_VISIBLE is_move_assignable 1208#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1209 : public is_assignable<typename add_lvalue_reference<_Tp>::type, 1210 const typename add_rvalue_reference<_Tp>::type> {}; 1211#else 1212 : public is_copy_assignable<_Tp> {}; 1213#endif 1214 1215// is_destructible 1216 1217template <class _Tp> 1218struct __destructible_test 1219{ 1220 _Tp __t; 1221}; 1222 1223template <class _Tp> 1224decltype((_VSTD::declval<__destructible_test<_Tp> >().~__destructible_test<_Tp>(), true_type())) 1225#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1226__is_destructible_test(_Tp&&); 1227#else 1228__is_destructible_test(_Tp&); 1229#endif 1230 1231false_type 1232__is_destructible_test(__any); 1233 1234template <class _Tp, bool = is_void<_Tp>::value || is_abstract<_Tp>::value> 1235struct __destructible_imp 1236 : public common_type 1237 < 1238 decltype(__is_destructible_test(declval<_Tp>())) 1239 >::type {}; 1240 1241template <class _Tp> 1242struct __destructible_imp<_Tp, true> 1243 : public false_type {}; 1244 1245template <class _Tp> 1246struct is_destructible 1247 : public __destructible_imp<_Tp> {}; 1248 1249// move 1250 1251#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1252 1253template <class _Tp> 1254inline _LIBCPP_INLINE_VISIBILITY 1255typename remove_reference<_Tp>::type&& 1256move(_Tp&& __t) _NOEXCEPT 1257{ 1258 typedef typename remove_reference<_Tp>::type _Up; 1259 return static_cast<_Up&&>(__t); 1260} 1261 1262template <class _Tp> 1263inline _LIBCPP_INLINE_VISIBILITY 1264_Tp&& 1265forward(typename std::remove_reference<_Tp>::type& __t) _NOEXCEPT 1266{ 1267 return static_cast<_Tp&&>(__t); 1268} 1269 1270template <class _Tp> 1271inline _LIBCPP_INLINE_VISIBILITY 1272_Tp&& 1273forward(typename std::remove_reference<_Tp>::type&& __t) _NOEXCEPT 1274{ 1275 static_assert(!std::is_lvalue_reference<_Tp>::value, 1276 "Can not forward an rvalue as an lvalue."); 1277 return static_cast<_Tp&&>(__t); 1278} 1279 1280#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1281 1282template <class _Tp> 1283class __rv 1284{ 1285 typedef typename remove_reference<_Tp>::type _Trr; 1286 _Trr& t_; 1287public: 1288 _LIBCPP_INLINE_VISIBILITY 1289 _Trr* operator->() {return &t_;} 1290 _LIBCPP_INLINE_VISIBILITY 1291 explicit __rv(_Trr& __t) : t_(__t) {} 1292}; 1293 1294template <class _Tp> 1295inline _LIBCPP_INLINE_VISIBILITY 1296typename enable_if 1297< 1298 !is_convertible<_Tp, __rv<_Tp> >::value, 1299 _Tp& 1300>::type 1301move(_Tp& __t) 1302{ 1303 return __t; 1304} 1305 1306template <class _Tp> 1307inline _LIBCPP_INLINE_VISIBILITY 1308typename enable_if 1309< 1310 is_convertible<_Tp, __rv<_Tp> >::value, 1311 _Tp 1312>::type 1313move(_Tp& __t) 1314{ 1315 return _Tp(__rv<_Tp>(__t)); 1316} 1317 1318template <class _Tp, class _Up> 1319inline _LIBCPP_INLINE_VISIBILITY 1320typename enable_if 1321< 1322 !is_convertible<_Tp, __rv<_Tp> >::value, 1323 typename add_lvalue_reference<_Tp>::type 1324>::type 1325forward(_Up& __t) 1326{ 1327 return __t; 1328} 1329 1330template <class _Tp, class _Up> 1331inline _LIBCPP_INLINE_VISIBILITY 1332typename enable_if 1333< 1334 !is_convertible<_Tp, __rv<_Tp> >::value, 1335 typename add_lvalue_reference<_Tp>::type 1336>::type 1337forward(const _Up& __t) 1338{ 1339 return __t; 1340} 1341 1342template <class _Tp, class _Up> 1343inline _LIBCPP_INLINE_VISIBILITY 1344typename enable_if 1345< 1346 is_convertible<_Tp, __rv<_Tp> >::value, 1347 _Tp 1348>::type 1349forward(_Up& __t) 1350{ 1351 return _Tp(__rv<_Tp>(__t)); 1352} 1353 1354template <class _Tp, class _Up> 1355inline _LIBCPP_INLINE_VISIBILITY 1356typename enable_if 1357< 1358 is_convertible<_Tp, __rv<_Tp> >::value, 1359 _Tp 1360>::type 1361forward(const _Up& __t) 1362{ 1363 return _Tp(__rv<_Tp>(__t)); 1364} 1365 1366#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1367 1368template <class _Tp> 1369struct _LIBCPP_VISIBLE decay 1370{ 1371private: 1372 typedef typename remove_reference<_Tp>::type _Up; 1373public: 1374 typedef typename conditional 1375 < 1376 is_array<_Up>::value, 1377 typename remove_extent<_Up>::type*, 1378 typename conditional 1379 < 1380 is_function<_Up>::value, 1381 typename add_pointer<_Up>::type, 1382 typename remove_cv<_Up>::type 1383 >::type 1384 >::type type; 1385}; 1386 1387#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1388 1389template <class _Tp> 1390inline _LIBCPP_INLINE_VISIBILITY 1391typename decay<_Tp>::type 1392__decay_copy(_Tp&& __t) 1393{ 1394 return _VSTD::forward<_Tp>(__t); 1395} 1396 1397#else 1398 1399template <class _Tp> 1400inline _LIBCPP_INLINE_VISIBILITY 1401typename decay<_Tp>::type 1402__decay_copy(const _Tp& __t) 1403{ 1404 return _VSTD::forward<_Tp>(__t); 1405} 1406 1407#endif 1408 1409template <class _MP, bool _IsMemberFuctionPtr, bool _IsMemberObjectPtr> 1410struct __member_pointer_traits_imp 1411{ 1412}; 1413 1414#ifndef _LIBCPP_HAS_NO_VARIADICS 1415 1416template <class _R, class _Class, class ..._Param> 1417struct __member_pointer_traits_imp<_R (_Class::*)(_Param...), true, false> 1418{ 1419 typedef _Class _ClassType; 1420 typedef _R _ReturnType; 1421}; 1422 1423template <class _R, class _Class, class ..._Param> 1424struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) const, true, false> 1425{ 1426 typedef _Class const _ClassType; 1427 typedef _R _ReturnType; 1428}; 1429 1430template <class _R, class _Class, class ..._Param> 1431struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) volatile, true, false> 1432{ 1433 typedef _Class volatile _ClassType; 1434 typedef _R _ReturnType; 1435}; 1436 1437template <class _R, class _Class, class ..._Param> 1438struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) const volatile, true, false> 1439{ 1440 typedef _Class const volatile _ClassType; 1441 typedef _R _ReturnType; 1442}; 1443 1444#if __has_feature(cxx_reference_qualified_functions) 1445 1446template <class _R, class _Class, class ..._Param> 1447struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) &, true, false> 1448{ 1449 typedef _Class& _ClassType; 1450 typedef _R _ReturnType; 1451}; 1452 1453template <class _R, class _Class, class ..._Param> 1454struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) const&, true, false> 1455{ 1456 typedef _Class const& _ClassType; 1457 typedef _R _ReturnType; 1458}; 1459 1460template <class _R, class _Class, class ..._Param> 1461struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) volatile&, true, false> 1462{ 1463 typedef _Class volatile& _ClassType; 1464 typedef _R _ReturnType; 1465}; 1466 1467template <class _R, class _Class, class ..._Param> 1468struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) const volatile&, true, false> 1469{ 1470 typedef _Class const volatile& _ClassType; 1471 typedef _R _ReturnType; 1472}; 1473 1474template <class _R, class _Class, class ..._Param> 1475struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) &&, true, false> 1476{ 1477 typedef _Class&& _ClassType; 1478 typedef _R _ReturnType; 1479}; 1480 1481template <class _R, class _Class, class ..._Param> 1482struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) const&&, true, false> 1483{ 1484 typedef _Class const&& _ClassType; 1485 typedef _R _ReturnType; 1486}; 1487 1488template <class _R, class _Class, class ..._Param> 1489struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) volatile&&, true, false> 1490{ 1491 typedef _Class volatile&& _ClassType; 1492 typedef _R _ReturnType; 1493}; 1494 1495template <class _R, class _Class, class ..._Param> 1496struct __member_pointer_traits_imp<_R (_Class::*)(_Param...) const volatile&&, true, false> 1497{ 1498 typedef _Class const volatile&& _ClassType; 1499 typedef _R _ReturnType; 1500}; 1501 1502#endif // __has_feature(cxx_reference_qualified_functions) 1503 1504#else // _LIBCPP_HAS_NO_VARIADICS 1505 1506template <class _R, class _Class> 1507struct __member_pointer_traits_imp<_R (_Class::*)(), true, false> 1508{ 1509 typedef _Class _ClassType; 1510 typedef _R _ReturnType; 1511}; 1512 1513template <class _R, class _Class, class _P0> 1514struct __member_pointer_traits_imp<_R (_Class::*)(_P0), true, false> 1515{ 1516 typedef _Class _ClassType; 1517 typedef _R _ReturnType; 1518}; 1519 1520template <class _R, class _Class, class _P0, class _P1> 1521struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1), true, false> 1522{ 1523 typedef _Class _ClassType; 1524 typedef _R _ReturnType; 1525}; 1526 1527template <class _R, class _Class, class _P0, class _P1, class _P2> 1528struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1, _P2), true, false> 1529{ 1530 typedef _Class _ClassType; 1531 typedef _R _ReturnType; 1532}; 1533 1534template <class _R, class _Class> 1535struct __member_pointer_traits_imp<_R (_Class::*)() const, true, false> 1536{ 1537 typedef _Class const _ClassType; 1538 typedef _R _ReturnType; 1539}; 1540 1541template <class _R, class _Class, class _P0> 1542struct __member_pointer_traits_imp<_R (_Class::*)(_P0) const, true, false> 1543{ 1544 typedef _Class const _ClassType; 1545 typedef _R _ReturnType; 1546}; 1547 1548template <class _R, class _Class, class _P0, class _P1> 1549struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1) const, true, false> 1550{ 1551 typedef _Class const _ClassType; 1552 typedef _R _ReturnType; 1553}; 1554 1555template <class _R, class _Class, class _P0, class _P1, class _P2> 1556struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1, _P2) const, true, false> 1557{ 1558 typedef _Class const _ClassType; 1559 typedef _R _ReturnType; 1560}; 1561 1562template <class _R, class _Class> 1563struct __member_pointer_traits_imp<_R (_Class::*)() volatile, true, false> 1564{ 1565 typedef _Class volatile _ClassType; 1566 typedef _R _ReturnType; 1567}; 1568 1569template <class _R, class _Class, class _P0> 1570struct __member_pointer_traits_imp<_R (_Class::*)(_P0) volatile, true, false> 1571{ 1572 typedef _Class volatile _ClassType; 1573 typedef _R _ReturnType; 1574}; 1575 1576template <class _R, class _Class, class _P0, class _P1> 1577struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1) volatile, true, false> 1578{ 1579 typedef _Class volatile _ClassType; 1580 typedef _R _ReturnType; 1581}; 1582 1583template <class _R, class _Class, class _P0, class _P1, class _P2> 1584struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1, _P2) volatile, true, false> 1585{ 1586 typedef _Class volatile _ClassType; 1587 typedef _R _ReturnType; 1588}; 1589 1590template <class _R, class _Class> 1591struct __member_pointer_traits_imp<_R (_Class::*)() const volatile, true, false> 1592{ 1593 typedef _Class const volatile _ClassType; 1594 typedef _R _ReturnType; 1595}; 1596 1597template <class _R, class _Class, class _P0> 1598struct __member_pointer_traits_imp<_R (_Class::*)(_P0) const volatile, true, false> 1599{ 1600 typedef _Class const volatile _ClassType; 1601 typedef _R _ReturnType; 1602}; 1603 1604template <class _R, class _Class, class _P0, class _P1> 1605struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1) const volatile, true, false> 1606{ 1607 typedef _Class const volatile _ClassType; 1608 typedef _R _ReturnType; 1609}; 1610 1611template <class _R, class _Class, class _P0, class _P1, class _P2> 1612struct __member_pointer_traits_imp<_R (_Class::*)(_P0, _P1, _P2) const volatile, true, false> 1613{ 1614 typedef _Class const volatile _ClassType; 1615 typedef _R _ReturnType; 1616}; 1617 1618#endif // _LIBCPP_HAS_NO_VARIADICS 1619 1620template <class _R, class _Class> 1621struct __member_pointer_traits_imp<_R _Class::*, false, true> 1622{ 1623 typedef _Class _ClassType; 1624 typedef _R _ReturnType; 1625}; 1626 1627template <class _MP> 1628struct __member_pointer_traits 1629 : public __member_pointer_traits_imp<_MP, 1630 is_member_function_pointer<_MP>::value, 1631 is_member_object_pointer<_MP>::value> 1632{ 1633// typedef ... _ClassType; 1634// typedef ... _ReturnType; 1635}; 1636 1637// result_of 1638 1639template <class _Callable> class result_of; 1640 1641template <class _Fn, bool, bool> 1642class __result_of 1643{ 1644}; 1645 1646#ifndef _LIBCPP_HAS_NO_VARIADICS 1647 1648template <class _Fn, class ..._ArgTypes> 1649class __result_of<_Fn(_ArgTypes...), true, false> 1650{ 1651public: 1652 typedef decltype(declval<_Fn>()(declval<_ArgTypes>()...)) type; 1653}; 1654 1655template <class _MP, class _Tp, bool _IsMemberFunctionPtr> 1656struct __result_of_mp; 1657 1658// member function pointer 1659 1660template <class _MP, class _Tp> 1661struct __result_of_mp<_MP, _Tp, true> 1662 : public common_type<typename __member_pointer_traits<_MP>::_ReturnType> 1663{ 1664}; 1665 1666// member data pointer 1667 1668template <class _MP, class _Tp, bool> 1669struct __result_of_mdp; 1670 1671template <class _R, class _Class, class _Tp> 1672struct __result_of_mdp<_R _Class::*, _Tp, false> 1673{ 1674 typedef typename __apply_cv<decltype(*_VSTD::declval<_Tp>()), _R>::type&& type; 1675}; 1676 1677template <class _R, class _Class, class _Tp> 1678struct __result_of_mdp<_R _Class::*, _Tp, true> 1679{ 1680 typedef typename __apply_cv<_Tp, _R>::type&& type; 1681}; 1682 1683template <class _R, class _Class, class _Tp> 1684struct __result_of_mp<_R _Class::*, _Tp, false> 1685 : public __result_of_mdp<_R _Class::*, _Tp, 1686 is_base_of<_Class, typename remove_reference<_Tp>::type>::value> 1687{ 1688}; 1689 1690template <class _Fn, class _Tp, class ..._ArgTypes> 1691class __result_of<_Fn(_Tp, _ArgTypes...), false, true> // _Fn must be member pointer 1692 : public __result_of_mp<typename remove_reference<_Fn>::type, 1693 _Tp, 1694 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 1695{ 1696}; 1697 1698// result_of 1699 1700template <class _Fn, class ..._ArgTypes> 1701class _LIBCPP_VISIBLE result_of<_Fn(_ArgTypes...)> 1702 : public __result_of<_Fn(_ArgTypes...), 1703 is_class<typename remove_reference<_Fn>::type>::value || 1704 is_function<typename remove_reference<_Fn>::type>::value, 1705 is_member_pointer<typename remove_reference<_Fn>::type>::value 1706 > 1707{ 1708}; 1709 1710#else // _LIBCPP_HAS_NO_VARIADICS 1711 1712template <class _Fn> 1713class __result_of<_Fn(), true, false> 1714{ 1715public: 1716 typedef decltype(declval<_Fn>()()) type; 1717}; 1718 1719template <class _Fn, class _A0> 1720class __result_of<_Fn(_A0), true, false> 1721{ 1722public: 1723 typedef decltype(declval<_Fn>()(declval<_A0>())) type; 1724}; 1725 1726template <class _Fn, class _A0, class _A1> 1727class __result_of<_Fn(_A0, _A1), true, false> 1728{ 1729public: 1730 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>())) type; 1731}; 1732 1733template <class _Fn, class _A0, class _A1, class _A2> 1734class __result_of<_Fn(_A0, _A1, _A2), true, false> 1735{ 1736public: 1737 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>(), declval<_A2>())) type; 1738}; 1739 1740template <class _MP, class _Tp, bool _IsMemberFunctionPtr> 1741struct __result_of_mp; 1742 1743// member function pointer 1744 1745template <class _MP, class _Tp> 1746struct __result_of_mp<_MP, _Tp, true> 1747 : public common_type<typename __member_pointer_traits<_MP>::_ReturnType> 1748{ 1749}; 1750 1751// member data pointer 1752 1753template <class _MP, class _Tp, bool> 1754struct __result_of_mdp; 1755 1756template <class _R, class _Class, class _Tp> 1757struct __result_of_mdp<_R _Class::*, _Tp, false> 1758{ 1759 typedef typename __apply_cv<decltype(*_VSTD::declval<_Tp>()), _R>::type& type; 1760}; 1761 1762template <class _R, class _Class, class _Tp> 1763struct __result_of_mdp<_R _Class::*, _Tp, true> 1764{ 1765 typedef typename __apply_cv<_Tp, _R>::type& type; 1766}; 1767 1768template <class _R, class _Class, class _Tp> 1769struct __result_of_mp<_R _Class::*, _Tp, false> 1770 : public __result_of_mdp<_R _Class::*, _Tp, 1771 is_base_of<_Class, typename remove_reference<_Tp>::type>::value> 1772{ 1773}; 1774 1775 1776 1777template <class _Fn, class _Tp> 1778class __result_of<_Fn(_Tp), false, true> // _Fn must be member pointer 1779 : public __result_of_mp<typename remove_reference<_Fn>::type, 1780 _Tp, 1781 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 1782{ 1783}; 1784 1785template <class _Fn, class _Tp, class _A0> 1786class __result_of<_Fn(_Tp, _A0), false, true> // _Fn must be member pointer 1787 : public __result_of_mp<typename remove_reference<_Fn>::type, 1788 _Tp, 1789 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 1790{ 1791}; 1792 1793template <class _Fn, class _Tp, class _A0, class _A1> 1794class __result_of<_Fn(_Tp, _A0, _A1), false, true> // _Fn must be member pointer 1795 : public __result_of_mp<typename remove_reference<_Fn>::type, 1796 _Tp, 1797 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 1798{ 1799}; 1800 1801template <class _Fn, class _Tp, class _A0, class _A1, class _A2> 1802class __result_of<_Fn(_Tp, _A0, _A1, _A2), false, true> // _Fn must be member pointer 1803 : public __result_of_mp<typename remove_reference<_Fn>::type, 1804 _Tp, 1805 is_member_function_pointer<typename remove_reference<_Fn>::type>::value> 1806{ 1807}; 1808 1809// result_of 1810 1811template <class _Fn> 1812class _LIBCPP_VISIBLE result_of<_Fn()> 1813 : public __result_of<_Fn(), 1814 is_class<typename remove_reference<_Fn>::type>::value || 1815 is_function<typename remove_reference<_Fn>::type>::value, 1816 is_member_pointer<typename remove_reference<_Fn>::type>::value 1817 > 1818{ 1819}; 1820 1821template <class _Fn, class _A0> 1822class _LIBCPP_VISIBLE result_of<_Fn(_A0)> 1823 : public __result_of<_Fn(_A0), 1824 is_class<typename remove_reference<_Fn>::type>::value || 1825 is_function<typename remove_reference<_Fn>::type>::value, 1826 is_member_pointer<typename remove_reference<_Fn>::type>::value 1827 > 1828{ 1829}; 1830 1831template <class _Fn, class _A0, class _A1> 1832class _LIBCPP_VISIBLE result_of<_Fn(_A0, _A1)> 1833 : public __result_of<_Fn(_A0, _A1), 1834 is_class<typename remove_reference<_Fn>::type>::value || 1835 is_function<typename remove_reference<_Fn>::type>::value, 1836 is_member_pointer<typename remove_reference<_Fn>::type>::value 1837 > 1838{ 1839}; 1840 1841template <class _Fn, class _A0, class _A1, class _A2> 1842class _LIBCPP_VISIBLE result_of<_Fn(_A0, _A1, _A2)> 1843 : public __result_of<_Fn(_A0, _A1, _A2), 1844 is_class<typename remove_reference<_Fn>::type>::value || 1845 is_function<typename remove_reference<_Fn>::type>::value, 1846 is_member_pointer<typename remove_reference<_Fn>::type>::value 1847 > 1848{ 1849}; 1850 1851#endif // _LIBCPP_HAS_NO_VARIADICS 1852 1853#ifndef _LIBCPP_HAS_NO_VARIADICS 1854 1855// template <class T, class... Args> struct is_constructible; 1856 1857// main is_constructible test 1858 1859template <class _Tp, class ..._Args> 1860decltype(_VSTD::move(_Tp(_VSTD::declval<_Args>()...)), true_type()) 1861__is_constructible_test(_Tp&&, _Args&& ...); 1862 1863template <class ..._Args> 1864false_type 1865__is_constructible_test(__any, _Args&& ...); 1866 1867template <bool, class _Tp, class... _Args> 1868struct __is_constructible // false, _Tp is not a scalar 1869 : public common_type 1870 < 1871 decltype(__is_constructible_test(declval<_Tp>(), declval<_Args>()...)) 1872 >::type 1873 {}; 1874 1875// function types are not constructible 1876 1877template <class _R, class... _A1, class... _A2> 1878struct __is_constructible<false, _R(_A1...), _A2...> 1879 : public false_type 1880 {}; 1881 1882// handle scalars and reference types 1883 1884// Scalars are default constructible, references are not 1885 1886template <class _Tp> 1887struct __is_constructible<true, _Tp> 1888 : public is_scalar<_Tp> 1889 {}; 1890 1891// Scalars and references are constructible from one arg if that arg is 1892// implicitly convertible to the scalar or reference. 1893 1894template <class _Tp> 1895struct __is_constructible_ref 1896{ 1897 true_type static __(_Tp); 1898 false_type static __(...); 1899}; 1900 1901template <class _Tp, class _A0> 1902struct __is_constructible<true, _Tp, _A0> 1903 : public common_type 1904 < 1905 decltype(__is_constructible_ref<_Tp>::__(declval<_A0>())) 1906 >::type 1907 {}; 1908 1909// Scalars and references are not constructible from multiple args. 1910 1911template <class _Tp, class _A0, class ..._Args> 1912struct __is_constructible<true, _Tp, _A0, _Args...> 1913 : public false_type 1914 {}; 1915 1916// Treat scalars and reference types separately 1917 1918template <bool, class _Tp, class... _Args> 1919struct __is_constructible_void_check 1920 : public __is_constructible<is_scalar<_Tp>::value || is_reference<_Tp>::value, 1921 _Tp, _Args...> 1922 {}; 1923 1924// If any of T or Args is void, is_constructible should be false 1925 1926template <class _Tp, class... _Args> 1927struct __is_constructible_void_check<true, _Tp, _Args...> 1928 : public false_type 1929 {}; 1930 1931template <class ..._Args> struct __contains_void; 1932 1933template <> struct __contains_void<> : false_type {}; 1934 1935template <class _A0, class ..._Args> 1936struct __contains_void<_A0, _Args...> 1937{ 1938 static const bool value = is_void<_A0>::value || 1939 __contains_void<_Args...>::value; 1940}; 1941 1942// is_constructible entry point 1943 1944template <class _Tp, class... _Args> 1945struct _LIBCPP_VISIBLE is_constructible 1946 : public __is_constructible_void_check<__contains_void<_Tp, _Args...>::value 1947 || is_abstract<_Tp>::value, 1948 _Tp, _Args...> 1949 {}; 1950 1951// Array types are default constructible if their element type 1952// is default constructible 1953 1954template <class _A, size_t _N> 1955struct __is_constructible<false, _A[_N]> 1956 : public is_constructible<typename remove_all_extents<_A>::type> 1957 {}; 1958 1959// Otherwise array types are not constructible by this syntax 1960 1961template <class _A, size_t _N, class ..._Args> 1962struct __is_constructible<false, _A[_N], _Args...> 1963 : public false_type 1964 {}; 1965 1966// Incomplete array types are not constructible 1967 1968template <class _A, class ..._Args> 1969struct __is_constructible<false, _A[], _Args...> 1970 : public false_type 1971 {}; 1972 1973#else // _LIBCPP_HAS_NO_VARIADICS 1974 1975// template <class T> struct is_constructible0; 1976 1977// main is_constructible0 test 1978 1979template <class _Tp> 1980decltype((_Tp(), true_type())) 1981__is_constructible0_test(_Tp&); 1982 1983false_type 1984__is_constructible0_test(__any); 1985 1986template <class _Tp, class _A0> 1987decltype((_Tp(_VSTD::declval<_A0>()), true_type())) 1988__is_constructible1_test(_Tp&, _A0&); 1989 1990template <class _A0> 1991false_type 1992__is_constructible1_test(__any, _A0&); 1993 1994template <class _Tp, class _A0, class _A1> 1995decltype((_Tp(_VSTD::declval<_A0>(), _VSTD::declval<_A1>()), true_type())) 1996__is_constructible2_test(_Tp&, _A0&, _A1&); 1997 1998template <class _A0, class _A1> 1999false_type 2000__is_constructible2_test(__any, _A0&, _A1&); 2001 2002template <bool, class _Tp> 2003struct __is_constructible0_imp // false, _Tp is not a scalar 2004 : public common_type 2005 < 2006 decltype(__is_constructible0_test(declval<_Tp&>())) 2007 >::type 2008 {}; 2009 2010template <bool, class _Tp, class _A0> 2011struct __is_constructible1_imp // false, _Tp is not a scalar 2012 : public common_type 2013 < 2014 decltype(__is_constructible1_test(declval<_Tp&>(), declval<_A0&>())) 2015 >::type 2016 {}; 2017 2018template <bool, class _Tp, class _A0, class _A1> 2019struct __is_constructible2_imp // false, _Tp is not a scalar 2020 : public common_type 2021 < 2022 decltype(__is_constructible2_test(declval<_Tp&>(), declval<_A0>(), declval<_A1>())) 2023 >::type 2024 {}; 2025 2026// handle scalars and reference types 2027 2028// Scalars are default constructible, references are not 2029 2030template <class _Tp> 2031struct __is_constructible0_imp<true, _Tp> 2032 : public is_scalar<_Tp> 2033 {}; 2034 2035template <class _Tp, class _A0> 2036struct __is_constructible1_imp<true, _Tp, _A0> 2037 : public is_convertible<_A0, _Tp> 2038 {}; 2039 2040template <class _Tp, class _A0, class _A1> 2041struct __is_constructible2_imp<true, _Tp, _A0, _A1> 2042 : public false_type 2043 {}; 2044 2045// Treat scalars and reference types separately 2046 2047template <bool, class _Tp> 2048struct __is_constructible0_void_check 2049 : public __is_constructible0_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 2050 _Tp> 2051 {}; 2052 2053template <bool, class _Tp, class _A0> 2054struct __is_constructible1_void_check 2055 : public __is_constructible1_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 2056 _Tp, _A0> 2057 {}; 2058 2059template <bool, class _Tp, class _A0, class _A1> 2060struct __is_constructible2_void_check 2061 : public __is_constructible2_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 2062 _Tp, _A0, _A1> 2063 {}; 2064 2065// If any of T or Args is void, is_constructible should be false 2066 2067template <class _Tp> 2068struct __is_constructible0_void_check<true, _Tp> 2069 : public false_type 2070 {}; 2071 2072template <class _Tp, class _A0> 2073struct __is_constructible1_void_check<true, _Tp, _A0> 2074 : public false_type 2075 {}; 2076 2077template <class _Tp, class _A0, class _A1> 2078struct __is_constructible2_void_check<true, _Tp, _A0, _A1> 2079 : public false_type 2080 {}; 2081 2082// is_constructible entry point 2083 2084namespace __is_construct 2085{ 2086 2087struct __nat {}; 2088 2089} 2090 2091template <class _Tp, class _A0 = __is_construct::__nat, 2092 class _A1 = __is_construct::__nat> 2093struct _LIBCPP_VISIBLE is_constructible 2094 : public __is_constructible2_void_check<is_void<_Tp>::value 2095 || is_abstract<_Tp>::value 2096 || is_function<_Tp>::value 2097 || is_void<_A0>::value 2098 || is_void<_A1>::value, 2099 _Tp, _A0, _A1> 2100 {}; 2101 2102template <class _Tp> 2103struct _LIBCPP_VISIBLE is_constructible<_Tp, __is_construct::__nat, __is_construct::__nat> 2104 : public __is_constructible0_void_check<is_void<_Tp>::value 2105 || is_abstract<_Tp>::value 2106 || is_function<_Tp>::value, 2107 _Tp> 2108 {}; 2109 2110template <class _Tp, class _A0> 2111struct _LIBCPP_VISIBLE is_constructible<_Tp, _A0, __is_construct::__nat> 2112 : public __is_constructible1_void_check<is_void<_Tp>::value 2113 || is_abstract<_Tp>::value 2114 || is_function<_Tp>::value 2115 || is_void<_A0>::value, 2116 _Tp, _A0> 2117 {}; 2118 2119// Array types are default constructible if their element type 2120// is default constructible 2121 2122template <class _A, size_t _N> 2123struct __is_constructible0_imp<false, _A[_N]> 2124 : public is_constructible<typename remove_all_extents<_A>::type> 2125 {}; 2126 2127template <class _A, size_t _N, class _A0> 2128struct __is_constructible1_imp<false, _A[_N], _A0> 2129 : public false_type 2130 {}; 2131 2132template <class _A, size_t _N, class _A0, class _A1> 2133struct __is_constructible2_imp<false, _A[_N], _A0, _A1> 2134 : public false_type 2135 {}; 2136 2137// Incomplete array types are not constructible 2138 2139template <class _A> 2140struct __is_constructible0_imp<false, _A[]> 2141 : public false_type 2142 {}; 2143 2144template <class _A, class _A0> 2145struct __is_constructible1_imp<false, _A[], _A0> 2146 : public false_type 2147 {}; 2148 2149template <class _A, class _A0, class _A1> 2150struct __is_constructible2_imp<false, _A[], _A0, _A1> 2151 : public false_type 2152 {}; 2153 2154#endif // _LIBCPP_HAS_NO_VARIADICS 2155 2156// is_default_constructible 2157 2158template <class _Tp> 2159struct _LIBCPP_VISIBLE is_default_constructible 2160 : public is_constructible<_Tp> 2161 {}; 2162 2163// is_copy_constructible 2164 2165template <class _Tp> 2166struct _LIBCPP_VISIBLE is_copy_constructible 2167 : public is_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type> 2168 {}; 2169 2170// is_move_constructible 2171 2172template <class _Tp> 2173struct _LIBCPP_VISIBLE is_move_constructible 2174#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2175 : public is_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 2176#else 2177 : public is_copy_constructible<_Tp> 2178#endif 2179 {}; 2180 2181// is_trivially_constructible 2182 2183#ifndef _LIBCPP_HAS_NO_VARIADICS 2184 2185template <class _Tp, class... _Args> 2186struct _LIBCPP_VISIBLE is_trivially_constructible 2187 : false_type 2188{ 2189}; 2190 2191template <class _Tp> 2192struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp> 2193#if __has_feature(has_trivial_constructor) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2194 : integral_constant<bool, __has_trivial_constructor(_Tp)> 2195#else 2196 : integral_constant<bool, is_scalar<_Tp>::value> 2197#endif 2198{ 2199}; 2200 2201template <class _Tp> 2202#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2203struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp&&> 2204#else 2205struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp> 2206#endif 2207#if __has_feature(has_trivial_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2208 : integral_constant<bool, __has_trivial_copy(_Tp)> 2209#else 2210 : integral_constant<bool, is_scalar<_Tp>::value> 2211#endif 2212{ 2213}; 2214 2215template <class _Tp> 2216struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, const _Tp&> 2217#if __has_feature(has_trivial_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2218 : integral_constant<bool, __has_trivial_copy(_Tp)> 2219#else 2220 : integral_constant<bool, is_scalar<_Tp>::value> 2221#endif 2222{ 2223}; 2224 2225template <class _Tp> 2226struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp&> 2227#if __has_feature(has_trivial_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2228 : integral_constant<bool, __has_trivial_copy(_Tp)> 2229#else 2230 : integral_constant<bool, is_scalar<_Tp>::value> 2231#endif 2232{ 2233}; 2234 2235#else // _LIBCPP_HAS_NO_VARIADICS 2236 2237template <class _Tp, class _A0 = __is_construct::__nat, 2238 class _A1 = __is_construct::__nat> 2239struct _LIBCPP_VISIBLE is_trivially_constructible 2240 : false_type 2241{ 2242}; 2243 2244template <class _Tp> 2245struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, __is_construct::__nat, 2246 __is_construct::__nat> 2247#if __has_feature(has_trivial_constructor) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2248 : integral_constant<bool, __has_trivial_constructor(_Tp)> 2249#else 2250 : integral_constant<bool, is_scalar<_Tp>::value> 2251#endif 2252{ 2253}; 2254 2255template <class _Tp> 2256struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp, 2257 __is_construct::__nat> 2258#if __has_feature(has_trivial_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2259 : integral_constant<bool, __has_trivial_copy(_Tp)> 2260#else 2261 : integral_constant<bool, is_scalar<_Tp>::value> 2262#endif 2263{ 2264}; 2265 2266template <class _Tp> 2267struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, const _Tp&, 2268 __is_construct::__nat> 2269#if __has_feature(has_trivial_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2270 : integral_constant<bool, __has_trivial_copy(_Tp)> 2271#else 2272 : integral_constant<bool, is_scalar<_Tp>::value> 2273#endif 2274{ 2275}; 2276 2277template <class _Tp> 2278struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp&, 2279 __is_construct::__nat> 2280#if __has_feature(has_trivial_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2281 : integral_constant<bool, __has_trivial_copy(_Tp)> 2282#else 2283 : integral_constant<bool, is_scalar<_Tp>::value> 2284#endif 2285{ 2286}; 2287 2288#endif // _LIBCPP_HAS_NO_VARIADICS 2289 2290// is_trivially_default_constructible 2291 2292template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_default_constructible 2293 : public is_trivially_constructible<_Tp> 2294 {}; 2295 2296// is_trivially_copy_constructible 2297 2298template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_copy_constructible 2299 : public is_trivially_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type> 2300 {}; 2301 2302// is_trivially_move_constructible 2303 2304template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_move_constructible 2305#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2306 : public is_trivially_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 2307#else 2308 : public is_trivially_copy_constructible<_Tp> 2309#endif 2310 {}; 2311 2312// is_trivially_assignable 2313 2314template <class _Tp, class _Arg> 2315struct is_trivially_assignable 2316 : public false_type {}; 2317 2318template <class _Tp> 2319struct is_trivially_assignable<_Tp&, _Tp> 2320#if __has_feature(has_trivial_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2321 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2322#else 2323 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2324#endif 2325 2326template <class _Tp> 2327struct is_trivially_assignable<_Tp&, _Tp&> 2328#if __has_feature(has_trivial_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2329 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2330#else 2331 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2332#endif 2333 2334template <class _Tp> 2335struct is_trivially_assignable<_Tp&, const _Tp&> 2336#if __has_feature(has_trivial_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2337 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2338#else 2339 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2340#endif 2341 2342#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2343 2344template <class _Tp> 2345struct is_trivially_assignable<_Tp&, _Tp&&> 2346#if __has_feature(has_trivial_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2347 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2348#else 2349 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2350#endif 2351 2352#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 2353 2354// is_trivially_copy_assignable 2355 2356template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_copy_assignable 2357 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 2358 const typename add_lvalue_reference<_Tp>::type> 2359 {}; 2360 2361// is_trivially_move_assignable 2362 2363template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_move_assignable 2364 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 2365#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2366 typename add_rvalue_reference<_Tp>::type> 2367#else 2368 typename add_lvalue_reference<_Tp>::type> 2369#endif 2370 {}; 2371 2372// is_trivially_destructible 2373 2374#if __has_feature(has_trivial_destructor) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2375 2376template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_destructible 2377 : public integral_constant<bool, __has_trivial_destructor(_Tp)> {}; 2378 2379#else // _LIBCPP_HAS_TYPE_TRAITS 2380 2381template <class _Tp> struct __libcpp_trivial_destructor 2382 : public integral_constant<bool, is_scalar<_Tp>::value || 2383 is_reference<_Tp>::value> {}; 2384 2385template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_destructible 2386 : public __libcpp_trivial_destructor<typename remove_all_extents<_Tp>::type> {}; 2387 2388#endif // _LIBCPP_HAS_TYPE_TRAITS 2389 2390// is_nothrow_constructible 2391 2392#ifndef _LIBCPP_HAS_NO_VARIADICS 2393 2394#if __has_feature(cxx_noexcept) 2395 2396template <bool, class _Tp, class... _Args> struct __is_nothrow_constructible; 2397 2398template <class _Tp, class... _Args> 2399struct __is_nothrow_constructible<true, _Tp, _Args...> 2400 : public integral_constant<bool, noexcept(_Tp(declval<_Args>()...))> 2401{ 2402}; 2403 2404template <class _Tp, class... _Args> 2405struct __is_nothrow_constructible<false, _Tp, _Args...> 2406 : public false_type 2407{ 2408}; 2409 2410template <class _Tp, class... _Args> 2411struct _LIBCPP_VISIBLE is_nothrow_constructible 2412 : __is_nothrow_constructible<is_constructible<_Tp, _Args...>::value, _Tp, _Args...> 2413{ 2414}; 2415 2416template <class _Tp, size_t _Ns> 2417struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp[_Ns]> 2418 : __is_nothrow_constructible<is_constructible<_Tp>::value, _Tp> 2419{ 2420}; 2421 2422#else // __has_feature(cxx_noexcept) 2423 2424template <class _Tp, class... _Args> 2425struct _LIBCPP_VISIBLE is_nothrow_constructible 2426 : false_type 2427{ 2428}; 2429 2430template <class _Tp> 2431struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp> 2432#if __has_feature(has_nothrow_constructor) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2433 : integral_constant<bool, __has_nothrow_constructor(_Tp)> 2434#else 2435 : integral_constant<bool, is_scalar<_Tp>::value> 2436#endif 2437{ 2438}; 2439 2440template <class _Tp> 2441#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2442struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp&&> 2443#else 2444struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp> 2445#endif 2446#if __has_feature(has_nothrow_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2447 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2448#else 2449 : integral_constant<bool, is_scalar<_Tp>::value> 2450#endif 2451{ 2452}; 2453 2454template <class _Tp> 2455struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, const _Tp&> 2456#if __has_feature(has_nothrow_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2457 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2458#else 2459 : integral_constant<bool, is_scalar<_Tp>::value> 2460#endif 2461{ 2462}; 2463 2464template <class _Tp> 2465struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp&> 2466#if __has_feature(has_nothrow_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2467 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2468#else 2469 : integral_constant<bool, is_scalar<_Tp>::value> 2470#endif 2471{ 2472}; 2473 2474#endif // __has_feature(cxx_noexcept) 2475 2476#else // _LIBCPP_HAS_NO_VARIADICS 2477 2478template <class _Tp, class _A0 = __is_construct::__nat, 2479 class _A1 = __is_construct::__nat> 2480struct _LIBCPP_VISIBLE is_nothrow_constructible 2481 : false_type 2482{ 2483}; 2484 2485template <class _Tp> 2486struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, __is_construct::__nat, 2487 __is_construct::__nat> 2488#if __has_feature(has_nothrow_constructor) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2489 : integral_constant<bool, __has_nothrow_constructor(_Tp)> 2490#else 2491 : integral_constant<bool, is_scalar<_Tp>::value> 2492#endif 2493{ 2494}; 2495 2496template <class _Tp> 2497struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp, 2498 __is_construct::__nat> 2499#if __has_feature(has_nothrow_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2500 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2501#else 2502 : integral_constant<bool, is_scalar<_Tp>::value> 2503#endif 2504{ 2505}; 2506 2507template <class _Tp> 2508struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, const _Tp&, 2509 __is_construct::__nat> 2510#if __has_feature(has_nothrow_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2511 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2512#else 2513 : integral_constant<bool, is_scalar<_Tp>::value> 2514#endif 2515{ 2516}; 2517 2518template <class _Tp> 2519struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp&, 2520 __is_construct::__nat> 2521#if __has_feature(has_nothrow_copy) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2522 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2523#else 2524 : integral_constant<bool, is_scalar<_Tp>::value> 2525#endif 2526{ 2527}; 2528 2529#endif // _LIBCPP_HAS_NO_VARIADICS 2530 2531// is_nothrow_default_constructible 2532 2533template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_default_constructible 2534 : public is_nothrow_constructible<_Tp> 2535 {}; 2536 2537// is_nothrow_copy_constructible 2538 2539template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_copy_constructible 2540 : public is_nothrow_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type> 2541 {}; 2542 2543// is_nothrow_move_constructible 2544 2545template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_move_constructible 2546#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2547 : public is_nothrow_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 2548#else 2549 : public is_nothrow_copy_constructible<_Tp> 2550#endif 2551 {}; 2552 2553// is_nothrow_assignable 2554 2555#if __has_feature(cxx_noexcept) 2556 2557template <bool, class _Tp, class _Arg> struct __is_nothrow_assignable; 2558 2559template <class _Tp, class _Arg> 2560struct __is_nothrow_assignable<false, _Tp, _Arg> 2561 : public false_type 2562{ 2563}; 2564 2565template <class _Tp, class _Arg> 2566struct __is_nothrow_assignable<true, _Tp, _Arg> 2567 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>() = _VSTD::declval<_Arg>()) > 2568{ 2569}; 2570 2571template <class _Tp, class _Arg> 2572struct _LIBCPP_VISIBLE is_nothrow_assignable 2573 : public __is_nothrow_assignable<is_assignable<_Tp, _Arg>::value, _Tp, _Arg> 2574{ 2575}; 2576 2577#else // __has_feature(cxx_noexcept) 2578 2579template <class _Tp, class _Arg> 2580struct _LIBCPP_VISIBLE is_nothrow_assignable 2581 : public false_type {}; 2582 2583template <class _Tp> 2584struct _LIBCPP_VISIBLE is_nothrow_assignable<_Tp&, _Tp> 2585#if __has_feature(has_nothrow_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2586 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2587#else 2588 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2589#endif 2590 2591template <class _Tp> 2592struct _LIBCPP_VISIBLE is_nothrow_assignable<_Tp&, _Tp&> 2593#if __has_feature(has_nothrow_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2594 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2595#else 2596 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2597#endif 2598 2599template <class _Tp> 2600struct _LIBCPP_VISIBLE is_nothrow_assignable<_Tp&, const _Tp&> 2601#if __has_feature(has_nothrow_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2602 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2603#else 2604 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2605#endif 2606 2607#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2608 2609template <class _Tp> 2610struct is_nothrow_assignable<_Tp&, _Tp&&> 2611#if __has_feature(has_nothrow_assign) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2612 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2613#else 2614 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2615#endif 2616 2617#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 2618 2619#endif // __has_feature(cxx_noexcept) 2620 2621// is_nothrow_copy_assignable 2622 2623template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_copy_assignable 2624 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 2625 const typename add_lvalue_reference<_Tp>::type> 2626 {}; 2627 2628// is_nothrow_move_assignable 2629 2630template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_move_assignable 2631 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 2632#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2633 typename add_rvalue_reference<_Tp>::type> 2634#else 2635 typename add_lvalue_reference<_Tp>::type> 2636#endif 2637 {}; 2638 2639// is_nothrow_destructible 2640 2641#if __has_feature(cxx_noexcept) 2642 2643template <bool, class _Tp> struct __is_nothrow_destructible; 2644 2645template <class _Tp> 2646struct __is_nothrow_destructible<false, _Tp> 2647 : public false_type 2648{ 2649}; 2650 2651template <class _Tp> 2652struct __is_nothrow_destructible<true, _Tp> 2653 : public integral_constant<bool, noexcept(_VSTD::declval<_Tp>().~_Tp()) > 2654{ 2655}; 2656 2657template <class _Tp> 2658struct _LIBCPP_VISIBLE is_nothrow_destructible 2659 : public __is_nothrow_destructible<is_destructible<_Tp>::value, _Tp> 2660{ 2661}; 2662 2663template <class _Tp, size_t _Ns> 2664struct _LIBCPP_VISIBLE is_nothrow_destructible<_Tp[_Ns]> 2665 : public is_nothrow_destructible<_Tp> 2666{ 2667}; 2668 2669template <class _Tp> 2670struct _LIBCPP_VISIBLE is_nothrow_destructible<_Tp&> 2671 : public true_type 2672{ 2673}; 2674 2675#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2676 2677template <class _Tp> 2678struct _LIBCPP_VISIBLE is_nothrow_destructible<_Tp&&> 2679 : public true_type 2680{ 2681}; 2682 2683#endif 2684 2685#else 2686 2687template <class _Tp> struct __libcpp_nothrow_destructor 2688 : public integral_constant<bool, is_scalar<_Tp>::value || 2689 is_reference<_Tp>::value> {}; 2690 2691template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_destructible 2692 : public __libcpp_nothrow_destructor<typename remove_all_extents<_Tp>::type> {}; 2693 2694#endif 2695 2696// is_pod 2697 2698#if __has_feature(is_pod) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 2699 2700template <class _Tp> struct _LIBCPP_VISIBLE is_pod 2701 : public integral_constant<bool, __is_pod(_Tp)> {}; 2702 2703#else // _LIBCPP_HAS_TYPE_TRAITS 2704 2705template <class _Tp> struct _LIBCPP_VISIBLE is_pod 2706 : public integral_constant<bool, is_trivially_default_constructible<_Tp>::value && 2707 is_trivially_copy_constructible<_Tp>::value && 2708 is_trivially_copy_assignable<_Tp>::value && 2709 is_trivially_destructible<_Tp>::value> {}; 2710 2711#endif // _LIBCPP_HAS_TYPE_TRAITS 2712 2713// is_literal_type; 2714 2715template <class _Tp> struct _LIBCPP_VISIBLE is_literal_type 2716#if __has_feature(is_literal) 2717 : public integral_constant<bool, __is_literal(_Tp)> 2718#else 2719 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value || 2720 is_reference<typename remove_all_extents<_Tp>::type>::value> 2721#endif 2722 {}; 2723 2724// is_standard_layout; 2725 2726template <class _Tp> struct _LIBCPP_VISIBLE is_standard_layout 2727#if __has_feature(is_standard_layout) 2728 : public integral_constant<bool, __is_standard_layout(_Tp)> 2729#else 2730 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 2731#endif 2732 {}; 2733 2734// is_trivially_copyable; 2735 2736template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_copyable 2737#if __has_feature(is_trivially_copyable) 2738 : public integral_constant<bool, __is_trivially_copyable(_Tp)> 2739#else 2740 : integral_constant<bool, is_scalar<typename remove_all_extents<_Tp>::type>::value> 2741#endif 2742 {}; 2743 2744// is_trivial; 2745 2746template <class _Tp> struct _LIBCPP_VISIBLE is_trivial 2747#if __has_feature(is_trivial) 2748 : public integral_constant<bool, __is_trivial(_Tp)> 2749#else 2750 : integral_constant<bool, is_trivially_copyable<_Tp>::value && 2751 is_trivially_default_constructible<_Tp>::value> 2752#endif 2753 {}; 2754 2755#ifndef _LIBCPP_HAS_NO_VARIADICS 2756 2757// Check for complete types 2758 2759template <class ..._T> struct __check_complete; 2760 2761template <> 2762struct __check_complete<> 2763{ 2764}; 2765 2766template <class _H, class _T0, class ..._T> 2767struct __check_complete<_H, _T0, _T...> 2768 : private __check_complete<_H>, 2769 private __check_complete<_T0, _T...> 2770{ 2771}; 2772 2773template <class _H> 2774struct __check_complete<_H, _H> 2775 : private __check_complete<_H> 2776{ 2777}; 2778 2779template <class _T> 2780struct __check_complete<_T> 2781{ 2782 static_assert(sizeof(_T) > 0, "Type must be complete."); 2783}; 2784 2785template <class _T> 2786struct __check_complete<_T&> 2787 : private __check_complete<_T> 2788{ 2789}; 2790 2791template <class _T> 2792struct __check_complete<_T&&> 2793 : private __check_complete<_T> 2794{ 2795}; 2796 2797template <class _R, class ..._Param> 2798struct __check_complete<_R (*)(_Param...)> 2799 : private __check_complete<_Param...> 2800{ 2801}; 2802 2803template <class _R, class ..._Param> 2804struct __check_complete<_R (_Param...)> 2805 : private __check_complete<_Param...> 2806{ 2807}; 2808 2809template <class _R, class _Class, class ..._Param> 2810struct __check_complete<_R (_Class::*)(_Param...)> 2811 : private __check_complete<_Class, _Param...> 2812{ 2813}; 2814 2815template <class _R, class _Class, class ..._Param> 2816struct __check_complete<_R (_Class::*)(_Param...) const> 2817 : private __check_complete<_Class, _Param...> 2818{ 2819}; 2820 2821template <class _R, class _Class, class ..._Param> 2822struct __check_complete<_R (_Class::*)(_Param...) volatile> 2823 : private __check_complete<_Class, _Param...> 2824{ 2825}; 2826 2827template <class _R, class _Class, class ..._Param> 2828struct __check_complete<_R (_Class::*)(_Param...) const volatile> 2829 : private __check_complete<_Class, _Param...> 2830{ 2831}; 2832 2833#if __has_feature(cxx_reference_qualified_functions) 2834 2835template <class _R, class _Class, class ..._Param> 2836struct __check_complete<_R (_Class::*)(_Param...) &> 2837 : private __check_complete<_Class, _Param...> 2838{ 2839}; 2840 2841template <class _R, class _Class, class ..._Param> 2842struct __check_complete<_R (_Class::*)(_Param...) const&> 2843 : private __check_complete<_Class, _Param...> 2844{ 2845}; 2846 2847template <class _R, class _Class, class ..._Param> 2848struct __check_complete<_R (_Class::*)(_Param...) volatile&> 2849 : private __check_complete<_Class, _Param...> 2850{ 2851}; 2852 2853template <class _R, class _Class, class ..._Param> 2854struct __check_complete<_R (_Class::*)(_Param...) const volatile&> 2855 : private __check_complete<_Class, _Param...> 2856{ 2857}; 2858 2859template <class _R, class _Class, class ..._Param> 2860struct __check_complete<_R (_Class::*)(_Param...) &&> 2861 : private __check_complete<_Class, _Param...> 2862{ 2863}; 2864 2865template <class _R, class _Class, class ..._Param> 2866struct __check_complete<_R (_Class::*)(_Param...) const&&> 2867 : private __check_complete<_Class, _Param...> 2868{ 2869}; 2870 2871template <class _R, class _Class, class ..._Param> 2872struct __check_complete<_R (_Class::*)(_Param...) volatile&&> 2873 : private __check_complete<_Class, _Param...> 2874{ 2875}; 2876 2877template <class _R, class _Class, class ..._Param> 2878struct __check_complete<_R (_Class::*)(_Param...) const volatile&&> 2879 : private __check_complete<_Class, _Param...> 2880{ 2881}; 2882 2883#endif 2884 2885template <class _R, class _Class> 2886struct __check_complete<_R _Class::*> 2887 : private __check_complete<_Class> 2888{ 2889}; 2890 2891// __invoke forward declarations 2892 2893// fall back - none of the bullets 2894 2895template <class ..._Args> 2896auto 2897__invoke(__any, _Args&& ...__args) 2898 -> __nat; 2899 2900// bullets 1 and 2 2901 2902template <class _F, class _A0, class ..._Args> 2903auto 2904__invoke(_F&& __f, _A0&& __a0, _Args&& ...__args) 2905 -> decltype((_VSTD::forward<_A0>(__a0).*__f)(_VSTD::forward<_Args>(__args)...)); 2906 2907template <class _F, class _A0, class ..._Args> 2908auto 2909__invoke(_F&& __f, _A0&& __a0, _Args&& ...__args) 2910 -> decltype(((*_VSTD::forward<_A0>(__a0)).*__f)(_VSTD::forward<_Args>(__args)...)); 2911 2912// bullets 3 and 4 2913 2914template <class _F, class _A0> 2915auto 2916__invoke(_F&& __f, _A0&& __a0) 2917 -> decltype(_VSTD::forward<_A0>(__a0).*__f); 2918 2919template <class _F, class _A0> 2920auto 2921__invoke(_F&& __f, _A0&& __a0) 2922 -> decltype((*_VSTD::forward<_A0>(__a0)).*__f); 2923 2924// bullet 5 2925 2926template <class _F, class ..._Args> 2927auto 2928__invoke(_F&& __f, _Args&& ...__args) 2929 -> decltype(_VSTD::forward<_F>(__f)(_VSTD::forward<_Args>(__args)...)); 2930 2931// __invokable 2932 2933template <class _F, class ..._Args> 2934struct __invokable_imp 2935 : private __check_complete<_F, _Args...> 2936{ 2937 typedef decltype( 2938 __invoke(_VSTD::declval<_F>(), _VSTD::declval<_Args>()...) 2939 ) type; 2940 static const bool value = !is_same<type, __nat>::value; 2941}; 2942 2943template <class _F, class ..._Args> 2944struct __invokable 2945 : public integral_constant<bool, 2946 __invokable_imp<_F, _Args...>::value> 2947{ 2948}; 2949 2950// __invoke_of 2951 2952template <bool _Invokable, class _F, class ..._Args> 2953struct __invoke_of_imp // false 2954{ 2955}; 2956 2957template <class _F, class ..._Args> 2958struct __invoke_of_imp<true, _F, _Args...> 2959{ 2960 typedef typename __invokable_imp<_F, _Args...>::type type; 2961}; 2962 2963template <class _F, class ..._Args> 2964struct __invoke_of 2965 : public __invoke_of_imp<__invokable<_F, _Args...>::value, _F, _Args...> 2966{ 2967}; 2968 2969#endif // _LIBCPP_HAS_NO_VARIADICS 2970 2971template <class _Tp> 2972inline _LIBCPP_INLINE_VISIBILITY 2973#ifndef _LIBCPP_HAS_NO_ADVANCED_SFINAE 2974typename enable_if 2975< 2976 is_move_constructible<_Tp>::value && 2977 is_move_assignable<_Tp>::value 2978>::type 2979#else 2980void 2981#endif 2982swap(_Tp& __x, _Tp& __y) _NOEXCEPT_(is_nothrow_move_constructible<_Tp>::value && 2983 is_nothrow_move_assignable<_Tp>::value) 2984{ 2985 _Tp __t(_VSTD::move(__x)); 2986 __x = _VSTD::move(__y); 2987 __y = _VSTD::move(__t); 2988} 2989 2990template <class _ForwardIterator1, class _ForwardIterator2> 2991inline _LIBCPP_INLINE_VISIBILITY 2992void 2993iter_swap(_ForwardIterator1 __a, _ForwardIterator2 __b) 2994 // _NOEXCEPT_(_NOEXCEPT_(swap(*__a, *__b))) 2995 _NOEXCEPT_(_NOEXCEPT_(swap(*_VSTD::declval<_ForwardIterator1>(), 2996 *_VSTD::declval<_ForwardIterator2>()))) 2997{ 2998 swap(*__a, *__b); 2999} 3000 3001// __swappable 3002 3003namespace __detail 3004{ 3005 3006using _VSTD::swap; 3007__nat swap(__any, __any); 3008 3009template <class _Tp> 3010struct __swappable 3011{ 3012 typedef decltype(swap(_VSTD::declval<_Tp&>(), _VSTD::declval<_Tp&>())) type; 3013 static const bool value = !is_same<type, __nat>::value; 3014}; 3015 3016} // __detail 3017 3018template <class _Tp> 3019struct __is_swappable 3020 : public integral_constant<bool, __detail::__swappable<_Tp>::value> 3021{ 3022}; 3023 3024#if __has_feature(cxx_noexcept) 3025 3026template <bool, class _Tp> 3027struct __is_nothrow_swappable_imp 3028 : public integral_constant<bool, noexcept(swap(_VSTD::declval<_Tp&>(), 3029 _VSTD::declval<_Tp&>()))> 3030{ 3031}; 3032 3033template <class _Tp> 3034struct __is_nothrow_swappable_imp<false, _Tp> 3035 : public false_type 3036{ 3037}; 3038 3039template <class _Tp> 3040struct __is_nothrow_swappable 3041 : public __is_nothrow_swappable_imp<__is_swappable<_Tp>::value, _Tp> 3042{ 3043}; 3044 3045#else // __has_feature(cxx_noexcept) 3046 3047template <class _Tp> 3048struct __is_nothrow_swappable 3049 : public false_type 3050{ 3051}; 3052 3053#endif // __has_feature(cxx_noexcept) 3054 3055#ifdef _LIBCXX_UNDERLYING_TYPE 3056 3057template <class _Tp> 3058struct underlying_type 3059{ 3060 typedef _LIBCXX_UNDERLYING_TYPE(_Tp) type; 3061}; 3062 3063#else // _LIBCXX_UNDERLYING_TYPE 3064 3065template <class _Tp, bool _Support = false> 3066struct underlying_type 3067{ 3068 static_assert(_Support, "The underyling_type trait requires compiler " 3069 "support. Either no such support exists or " 3070 "libc++ does not know how to use it."); 3071}; 3072 3073#endif // _LIBCXX_UNDERLYING_TYPE 3074 3075_LIBCPP_END_NAMESPACE_STD 3076 3077#endif // _LIBCPP_TYPE_TRAITS 3078