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 template <std::size_t Len, class... Types> struct aligned_union; 133 134 template <class T> struct decay; 135 template <class... T> struct common_type; 136 template <class T> struct underlying_type; 137 template <class> class result_of; // undefined 138 template <class Fn, class... ArgTypes> class result_of<Fn(ArgTypes...)>; 139 140} // std 141 142*/ 143#include <__config> 144#include <cstddef> 145 146#pragma GCC system_header 147 148_LIBCPP_BEGIN_NAMESPACE_STD 149 150template <bool _B, class _If, class _Then> 151 struct _LIBCPP_VISIBLE conditional {typedef _If type;}; 152template <class _If, class _Then> 153 struct _LIBCPP_VISIBLE conditional<false, _If, _Then> {typedef _Then type;}; 154 155template <bool, class _Tp = void> struct _LIBCPP_VISIBLE enable_if {}; 156template <class _Tp> struct _LIBCPP_VISIBLE enable_if<true, _Tp> {typedef _Tp type;}; 157 158struct __two {char _[2];}; 159 160// helper class: 161 162template <class _Tp, _Tp __v> 163struct _LIBCPP_VISIBLE integral_constant 164{ 165 static constexpr _Tp value = __v; 166 typedef _Tp value_type; 167 typedef integral_constant type; 168 _LIBCPP_INLINE_VISIBILITY 169#ifndef _LIBCPP_HAS_NO_CONSTEXPR 170 constexpr 171#endif 172 operator value_type() const {return value;} 173}; 174 175template <class _Tp, _Tp __v> 176const _Tp integral_constant<_Tp, __v>::value; 177 178typedef integral_constant<bool, true> true_type; 179typedef integral_constant<bool, false> false_type; 180 181// is_const 182 183template <class _Tp> struct _LIBCPP_VISIBLE is_const : public false_type {}; 184template <class _Tp> struct _LIBCPP_VISIBLE is_const<_Tp const> : public true_type {}; 185 186// is_volatile 187 188template <class _Tp> struct _LIBCPP_VISIBLE is_volatile : public false_type {}; 189template <class _Tp> struct _LIBCPP_VISIBLE is_volatile<_Tp volatile> : public true_type {}; 190 191// remove_const 192 193template <class _Tp> struct _LIBCPP_VISIBLE remove_const {typedef _Tp type;}; 194template <class _Tp> struct _LIBCPP_VISIBLE remove_const<const _Tp> {typedef _Tp type;}; 195 196// remove_volatile 197 198template <class _Tp> struct _LIBCPP_VISIBLE remove_volatile {typedef _Tp type;}; 199template <class _Tp> struct _LIBCPP_VISIBLE remove_volatile<volatile _Tp> {typedef _Tp type;}; 200 201// remove_cv 202 203template <class _Tp> struct _LIBCPP_VISIBLE remove_cv 204{typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;}; 205 206// is_void 207 208template <class _Tp> struct __is_void : public false_type {}; 209template <> struct __is_void<void> : public true_type {}; 210 211template <class _Tp> struct _LIBCPP_VISIBLE is_void 212 : public __is_void<typename remove_cv<_Tp>::type> {}; 213 214// is_integral 215 216template <class _Tp> struct __is_integral : public false_type {}; 217template <> struct __is_integral<bool> : public true_type {}; 218template <> struct __is_integral<char> : public true_type {}; 219template <> struct __is_integral<signed char> : public true_type {}; 220template <> struct __is_integral<unsigned char> : public true_type {}; 221template <> struct __is_integral<wchar_t> : public true_type {}; 222#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 223template <> struct __is_integral<char16_t> : public true_type {}; 224template <> struct __is_integral<char32_t> : public true_type {}; 225#endif // _LIBCPP_HAS_NO_UNICODE_CHARS 226template <> struct __is_integral<short> : public true_type {}; 227template <> struct __is_integral<unsigned short> : public true_type {}; 228template <> struct __is_integral<int> : public true_type {}; 229template <> struct __is_integral<unsigned int> : public true_type {}; 230template <> struct __is_integral<long> : public true_type {}; 231template <> struct __is_integral<unsigned long> : public true_type {}; 232template <> struct __is_integral<long long> : public true_type {}; 233template <> struct __is_integral<unsigned long long> : public true_type {}; 234 235template <class _Tp> struct _LIBCPP_VISIBLE is_integral 236 : public __is_integral<typename remove_cv<_Tp>::type> {}; 237 238// is_floating_point 239 240template <class _Tp> struct __is_floating_point : public false_type {}; 241template <> struct __is_floating_point<float> : public true_type {}; 242template <> struct __is_floating_point<double> : public true_type {}; 243template <> struct __is_floating_point<long double> : public true_type {}; 244 245template <class _Tp> struct _LIBCPP_VISIBLE is_floating_point 246 : public __is_floating_point<typename remove_cv<_Tp>::type> {}; 247 248// is_array 249 250template <class _Tp> struct _LIBCPP_VISIBLE is_array 251 : public false_type {}; 252template <class _Tp> struct _LIBCPP_VISIBLE is_array<_Tp[]> 253 : public true_type {}; 254template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE is_array<_Tp[_Np]> 255 : public true_type {}; 256 257// is_pointer 258 259template <class _Tp> struct __is_pointer : public false_type {}; 260template <class _Tp> struct __is_pointer<_Tp*> : public true_type {}; 261 262template <class _Tp> struct _LIBCPP_VISIBLE is_pointer 263 : public __is_pointer<typename remove_cv<_Tp>::type> {}; 264 265// is_reference 266 267template <class _Tp> struct _LIBCPP_VISIBLE is_lvalue_reference : public false_type {}; 268template <class _Tp> struct _LIBCPP_VISIBLE is_lvalue_reference<_Tp&> : public true_type {}; 269 270template <class _Tp> struct _LIBCPP_VISIBLE is_rvalue_reference : public false_type {}; 271#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 272template <class _Tp> struct _LIBCPP_VISIBLE is_rvalue_reference<_Tp&&> : public true_type {}; 273#endif 274 275template <class _Tp> struct _LIBCPP_VISIBLE is_reference : public false_type {}; 276template <class _Tp> struct _LIBCPP_VISIBLE is_reference<_Tp&> : public true_type {}; 277#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 278template <class _Tp> struct _LIBCPP_VISIBLE is_reference<_Tp&&> : public true_type {}; 279#endif 280 281#if defined(__clang__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) 282#define _LIBCPP_HAS_TYPE_TRAITS 283#endif 284 285// is_union 286 287#ifdef _LIBCPP_HAS_TYPE_TRAITS 288 289template <class _Tp> struct _LIBCPP_VISIBLE is_union 290 : public integral_constant<bool, __is_union(_Tp)> {}; 291 292#else // _LIBCPP_HAS_TYPE_TRAITS 293 294template <class _Tp> struct __libcpp_union : public false_type {}; 295template <class _Tp> struct _LIBCPP_VISIBLE is_union 296 : public __libcpp_union<typename remove_cv<_Tp>::type> {}; 297 298#endif // _LIBCPP_HAS_TYPE_TRAITS 299 300// is_class 301 302#ifdef _LIBCPP_HAS_TYPE_TRAITS 303 304template <class _Tp> struct _LIBCPP_VISIBLE is_class 305 : public integral_constant<bool, __is_class(_Tp)> {}; 306 307#else // _LIBCPP_HAS_TYPE_TRAITS 308 309namespace __is_class_imp 310{ 311template <class _Tp> char __test(int _Tp::*); 312template <class _Tp> __two __test(...); 313} 314 315template <class _Tp> struct _LIBCPP_VISIBLE is_class 316 : public integral_constant<bool, sizeof(__is_class_imp::__test<_Tp>(0)) == 1 && !is_union<_Tp>::value> {}; 317 318#endif // _LIBCPP_HAS_TYPE_TRAITS 319 320// is_function 321 322namespace __is_function_imp 323{ 324template <class _Tp> char __test(_Tp*); 325template <class _Tp> __two __test(...); 326template <class _Tp> _Tp& __source(); 327} 328 329template <class _Tp, bool = is_class<_Tp>::value || 330 is_union<_Tp>::value || 331 is_void<_Tp>::value || 332 is_reference<_Tp>::value> 333struct __is_function 334 : public integral_constant<bool, sizeof(__is_function_imp::__test<_Tp>(__is_function_imp::__source<_Tp>())) == 1> 335 {}; 336template <class _Tp> struct __is_function<_Tp, true> : public false_type {}; 337 338template <class _Tp> struct _LIBCPP_VISIBLE is_function 339 : public __is_function<_Tp> {}; 340 341// is_member_function_pointer 342 343template <class _Tp> struct __is_member_function_pointer : public false_type {}; 344template <class _Tp, class _Up> struct __is_member_function_pointer<_Tp _Up::*> : public is_function<_Tp> {}; 345 346template <class _Tp> struct _LIBCPP_VISIBLE is_member_function_pointer 347 : public __is_member_function_pointer<typename remove_cv<_Tp>::type> {}; 348 349// is_member_pointer 350 351template <class _Tp> struct __is_member_pointer : public false_type {}; 352template <class _Tp, class _Up> struct __is_member_pointer<_Tp _Up::*> : public true_type {}; 353 354template <class _Tp> struct _LIBCPP_VISIBLE is_member_pointer 355 : public __is_member_pointer<typename remove_cv<_Tp>::type> {}; 356 357// is_member_object_pointer 358 359template <class _Tp> struct _LIBCPP_VISIBLE is_member_object_pointer 360 : public integral_constant<bool, is_member_pointer<_Tp>::value && 361 !is_member_function_pointer<_Tp>::value> {}; 362 363// is_enum 364 365#ifdef _LIBCPP_HAS_TYPE_TRAITS 366 367template <class _Tp> struct _LIBCPP_VISIBLE is_enum 368 : public integral_constant<bool, __is_enum(_Tp)> {}; 369 370#else // _LIBCPP_HAS_TYPE_TRAITS 371 372template <class _Tp> struct _LIBCPP_VISIBLE is_enum 373 : public integral_constant<bool, !is_void<_Tp>::value && 374 !is_integral<_Tp>::value && 375 !is_floating_point<_Tp>::value && 376 !is_array<_Tp>::value && 377 !is_pointer<_Tp>::value && 378 !is_reference<_Tp>::value && 379 !is_member_pointer<_Tp>::value && 380 !is_union<_Tp>::value && 381 !is_class<_Tp>::value && 382 !is_function<_Tp>::value > {}; 383 384#endif // _LIBCPP_HAS_TYPE_TRAITS 385 386// is_arithmetic 387 388template <class _Tp> struct _LIBCPP_VISIBLE is_arithmetic 389 : public integral_constant<bool, is_integral<_Tp>::value || 390 is_floating_point<_Tp>::value> {}; 391 392// is_fundamental 393 394template <class _Tp> struct _LIBCPP_VISIBLE is_fundamental 395 : public integral_constant<bool, is_void<_Tp>::value || 396 is_arithmetic<_Tp>::value> {}; 397 398// is_scalar 399 400template <class _Tp> struct _LIBCPP_VISIBLE is_scalar 401 : public integral_constant<bool, is_arithmetic<_Tp>::value || 402 is_member_pointer<_Tp>::value || 403 is_pointer<_Tp>::value || 404 is_enum<_Tp>::value > {}; 405 406// is_object 407 408template <class _Tp> struct _LIBCPP_VISIBLE is_object 409 : public integral_constant<bool, is_scalar<_Tp>::value || 410 is_array<_Tp>::value || 411 is_union<_Tp>::value || 412 is_class<_Tp>::value > {}; 413 414// is_compound 415 416template <class _Tp> struct _LIBCPP_VISIBLE is_compound 417 : public integral_constant<bool, !is_fundamental<_Tp>::value> {}; 418 419// add_const 420 421template <class _Tp, bool = is_reference<_Tp>::value || 422 is_function<_Tp>::value || 423 is_const<_Tp>::value > 424struct __add_const {typedef _Tp type;}; 425 426template <class _Tp> 427struct __add_const<_Tp, false> {typedef const _Tp type;}; 428 429template <class _Tp> struct _LIBCPP_VISIBLE add_const 430 {typedef typename __add_const<_Tp>::type type;}; 431 432// add_volatile 433 434template <class _Tp, bool = is_reference<_Tp>::value || 435 is_function<_Tp>::value || 436 is_volatile<_Tp>::value > 437struct __add_volatile {typedef _Tp type;}; 438 439template <class _Tp> 440struct __add_volatile<_Tp, false> {typedef volatile _Tp type;}; 441 442template <class _Tp> struct _LIBCPP_VISIBLE add_volatile 443 {typedef typename __add_volatile<_Tp>::type type;}; 444 445// add_cv 446 447template <class _Tp> struct _LIBCPP_VISIBLE add_cv 448 {typedef typename add_const<typename add_volatile<_Tp>::type>::type type;}; 449 450// remove_reference 451 452template <class _Tp> struct _LIBCPP_VISIBLE remove_reference {typedef _Tp type;}; 453template <class _Tp> struct _LIBCPP_VISIBLE remove_reference<_Tp&> {typedef _Tp type;}; 454#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 455template <class _Tp> struct _LIBCPP_VISIBLE remove_reference<_Tp&&> {typedef _Tp type;}; 456#endif 457 458// add_lvalue_reference 459 460template <class _Tp> struct _LIBCPP_VISIBLE add_lvalue_reference {typedef _Tp& type;}; 461template <class _Tp> struct _LIBCPP_VISIBLE add_lvalue_reference<_Tp&> {typedef _Tp& type;}; // for older compiler 462template <> struct _LIBCPP_VISIBLE add_lvalue_reference<void> {typedef void type;}; 463template <> struct _LIBCPP_VISIBLE add_lvalue_reference<const void> {typedef const void type;}; 464template <> struct _LIBCPP_VISIBLE add_lvalue_reference<volatile void> {typedef volatile void type;}; 465template <> struct _LIBCPP_VISIBLE add_lvalue_reference<const volatile void> {typedef const volatile void type;}; 466 467#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 468 469template <class _Tp> struct _LIBCPP_VISIBLE add_rvalue_reference {typedef _Tp&& type;}; 470template <> struct _LIBCPP_VISIBLE add_rvalue_reference<void> {typedef void type;}; 471template <> struct _LIBCPP_VISIBLE add_rvalue_reference<const void> {typedef const void type;}; 472template <> struct _LIBCPP_VISIBLE add_rvalue_reference<volatile void> {typedef volatile void type;}; 473template <> struct _LIBCPP_VISIBLE add_rvalue_reference<const volatile void> {typedef const volatile void type;}; 474 475#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 476 477#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 478 479template <class _Tp> 480typename add_rvalue_reference<_Tp>::type 481declval(); 482 483#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 484 485template <class _Tp> 486typename add_lvalue_reference<_Tp>::type 487declval(); 488 489#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 490 491struct __any 492{ 493 __any(...); 494}; 495 496// remove_pointer 497 498template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer {typedef _Tp type;}; 499template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp*> {typedef _Tp type;}; 500template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp* const> {typedef _Tp type;}; 501template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp* volatile> {typedef _Tp type;}; 502template <class _Tp> struct _LIBCPP_VISIBLE remove_pointer<_Tp* const volatile> {typedef _Tp type;}; 503 504// add_pointer 505 506template <class _Tp> struct _LIBCPP_VISIBLE add_pointer 507 {typedef typename remove_reference<_Tp>::type* type;}; 508 509// is_signed 510 511template <class _Tp, bool = is_integral<_Tp>::value> 512struct ___is_signed : public integral_constant<bool, _Tp(-1) < _Tp(0)> {}; 513 514template <class _Tp> 515struct ___is_signed<_Tp, false> : public true_type {}; // floating point 516 517template <class _Tp, bool = is_arithmetic<_Tp>::value> 518struct __is_signed : public ___is_signed<_Tp> {}; 519 520template <class _Tp> struct __is_signed<_Tp, false> : public false_type {}; 521 522template <class _Tp> struct _LIBCPP_VISIBLE is_signed : public __is_signed<_Tp> {}; 523 524// is_unsigned 525 526template <class _Tp, bool = is_integral<_Tp>::value> 527struct ___is_unsigned : public integral_constant<bool, _Tp(0) < _Tp(-1)> {}; 528 529template <class _Tp> 530struct ___is_unsigned<_Tp, false> : public false_type {}; // floating point 531 532template <class _Tp, bool = is_arithmetic<_Tp>::value> 533struct __is_unsigned : public ___is_unsigned<_Tp> {}; 534 535template <class _Tp> struct __is_unsigned<_Tp, false> : public false_type {}; 536 537template <class _Tp> struct _LIBCPP_VISIBLE is_unsigned : public __is_unsigned<_Tp> {}; 538 539// rank 540 541template <class _Tp> struct _LIBCPP_VISIBLE rank 542 : public integral_constant<size_t, 0> {}; 543template <class _Tp> struct _LIBCPP_VISIBLE rank<_Tp[]> 544 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 545template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE rank<_Tp[_Np]> 546 : public integral_constant<size_t, rank<_Tp>::value + 1> {}; 547 548// extent 549 550template <class _Tp, unsigned _Ip = 0> struct _LIBCPP_VISIBLE extent 551 : public integral_constant<size_t, 0> {}; 552template <class _Tp> struct _LIBCPP_VISIBLE extent<_Tp[], 0> 553 : public integral_constant<size_t, 0> {}; 554template <class _Tp, unsigned _Ip> struct _LIBCPP_VISIBLE extent<_Tp[], _Ip> 555 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 556template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE extent<_Tp[_Np], 0> 557 : public integral_constant<size_t, _Np> {}; 558template <class _Tp, size_t _Np, unsigned _Ip> struct _LIBCPP_VISIBLE extent<_Tp[_Np], _Ip> 559 : public integral_constant<size_t, extent<_Tp, _Ip-1>::value> {}; 560 561// remove_extent 562 563template <class _Tp> struct _LIBCPP_VISIBLE remove_extent 564 {typedef _Tp type;}; 565template <class _Tp> struct _LIBCPP_VISIBLE remove_extent<_Tp[]> 566 {typedef _Tp type;}; 567template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE remove_extent<_Tp[_Np]> 568 {typedef _Tp type;}; 569 570// remove_all_extents 571 572template <class _Tp> struct _LIBCPP_VISIBLE remove_all_extents 573 {typedef _Tp type;}; 574template <class _Tp> struct _LIBCPP_VISIBLE remove_all_extents<_Tp[]> 575 {typedef typename remove_all_extents<_Tp>::type type;}; 576template <class _Tp, size_t _Np> struct _LIBCPP_VISIBLE remove_all_extents<_Tp[_Np]> 577 {typedef typename remove_all_extents<_Tp>::type type;}; 578 579// is_same 580 581template <class _Tp, class _Up> struct _LIBCPP_VISIBLE is_same : public false_type {}; 582template <class _Tp> struct _LIBCPP_VISIBLE is_same<_Tp, _Tp> : public true_type {}; 583 584// is_abstract 585 586namespace __is_abstract_imp 587{ 588template <class _Tp> char __test(_Tp (*)[1]); 589template <class _Tp> __two __test(...); 590} 591 592template <class _Tp, bool = is_class<_Tp>::value> 593struct __libcpp_abstract : public integral_constant<bool, sizeof(__is_abstract_imp::__test<_Tp>(0)) != 1> {}; 594 595template <class _Tp> struct __libcpp_abstract<_Tp, false> : public false_type {}; 596 597template <class _Tp> struct _LIBCPP_VISIBLE is_abstract : public __libcpp_abstract<_Tp> {}; 598 599// is_convertible 600 601namespace __is_convertible_imp 602{ 603template <class _Tp> char __test(_Tp); 604template <class _Tp> __two __test(...); 605#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 606template <class _Tp> _Tp&& __source(); 607#else 608template <class _Tp> typename remove_reference<_Tp>::type& __source(); 609#endif 610 611template <class _Tp, bool _IsArray = is_array<_Tp>::value, 612 bool _IsFunction = is_function<_Tp>::value, 613 bool _IsVoid = is_void<_Tp>::value> 614 struct __is_array_function_or_void {enum {value = 0};}; 615template <class _Tp> struct __is_array_function_or_void<_Tp, true, false, false> {enum {value = 1};}; 616template <class _Tp> struct __is_array_function_or_void<_Tp, false, true, false> {enum {value = 2};}; 617template <class _Tp> struct __is_array_function_or_void<_Tp, false, false, true> {enum {value = 3};}; 618} 619 620template <class _Tp, 621 unsigned = __is_convertible_imp::__is_array_function_or_void<typename remove_reference<_Tp>::type>::value> 622struct __is_convertible_check 623{ 624 static const size_t __v = 0; 625}; 626 627template <class _Tp> 628struct __is_convertible_check<_Tp, 0> 629{ 630 static const size_t __v = sizeof(_Tp); 631}; 632 633template <class _T1, class _T2, 634 unsigned _T1_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T1>::value, 635 unsigned _T2_is_array_function_or_void = __is_convertible_imp::__is_array_function_or_void<_T2>::value> 636struct __is_convertible 637 : public integral_constant<bool, 638 sizeof(__is_convertible_imp::__test<_T2>(__is_convertible_imp::__source<_T1>())) == 1 639 > 640{}; 641 642template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 0> : false_type {}; 643 644template <class _T1> struct __is_convertible<_T1, const _T1&, 1, 0> : true_type {}; 645#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 646template <class _T1> struct __is_convertible<_T1, _T1&&, 1, 0> : true_type {}; 647template <class _T1> struct __is_convertible<_T1, const _T1&&, 1, 0> : true_type {}; 648template <class _T1> struct __is_convertible<_T1, volatile _T1&&, 1, 0> : true_type {}; 649template <class _T1> struct __is_convertible<_T1, const volatile _T1&&, 1, 0> : true_type {}; 650#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 651 652template <class _T1, class _T2> struct __is_convertible<_T1, _T2*, 1, 0> 653 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*>::value> {}; 654 655template <class _T1, class _T2> struct __is_convertible<_T1, _T2* const, 1, 0> 656 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*const>::value> {}; 657 658template <class _T1, class _T2> struct __is_convertible<_T1, _T2* volatile, 1, 0> 659 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*volatile>::value> {}; 660 661template <class _T1, class _T2> struct __is_convertible<_T1, _T2* const volatile, 1, 0> 662 : public integral_constant<bool, __is_convertible<typename remove_all_extents<_T1>::type*, _T2*const volatile>::value> {}; 663 664template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 0> : public false_type {}; 665#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 666template <class _T1> struct __is_convertible<_T1, _T1&&, 2, 0> : public true_type {}; 667#endif 668template <class _T1> struct __is_convertible<_T1, _T1*, 2, 0> : public true_type {}; 669template <class _T1> struct __is_convertible<_T1, _T1*const, 2, 0> : public true_type {}; 670template <class _T1> struct __is_convertible<_T1, _T1*volatile, 2, 0> : public true_type {}; 671template <class _T1> struct __is_convertible<_T1, _T1*const volatile, 2, 0> : public true_type {}; 672 673template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 0> : public false_type {}; 674 675template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 1> : public false_type {}; 676template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 1> : public false_type {}; 677template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 1> : public false_type {}; 678template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 1> : public false_type {}; 679 680template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 2> : public false_type {}; 681template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 2> : public false_type {}; 682template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 2> : public false_type {}; 683template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 2> : public false_type {}; 684 685template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 0, 3> : public false_type {}; 686template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 1, 3> : public false_type {}; 687template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 2, 3> : public false_type {}; 688template <class _T1, class _T2> struct __is_convertible<_T1, _T2, 3, 3> : public true_type {}; 689 690template <class _T1, class _T2> struct _LIBCPP_VISIBLE is_convertible 691 : public __is_convertible<_T1, _T2> 692{ 693 static const size_t __complete_check1 = __is_convertible_check<_T1>::__v; 694 static const size_t __complete_check2 = __is_convertible_check<_T2>::__v; 695}; 696 697// is_base_of 698 699// (C) Copyright Rani Sharoni 2003. 700// Use, modification and distribution are subject to the Boost Software License, 701// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 702// http://www.boost.org/LICENSE_1_0.txt). 703// 704// See http://www.boost.org/libs/type_traits for most recent version including documentation. 705 706template <class _Bp, class _Dp> 707struct __is_base_of_tests 708{ 709 template <class _Tp> 710 static char __test(const volatile _Dp*, _Tp); 711 static __two __test(const volatile _Bp*, int); 712}; 713 714template <class _Bp, class _Dp> 715struct __is_base_of_imp 716{ 717 struct __host 718 { 719 operator const volatile _Bp*() const; 720 operator const volatile _Dp*(); 721 }; 722 723 static const size_t __complete_check = sizeof(_Dp); 724 static const bool value = sizeof(__is_base_of_tests<_Bp, _Dp>::__test(__host(), 0)) == 1; 725}; 726 727template <class _Bp, class _Dp, bool = is_class<_Bp>::value, 728 bool = is_class<_Dp>::value, 729 bool = is_same<_Bp, _Dp>::value> 730struct __libcpp_base_of : public false_type {}; 731 732template <class _Bp, class _Dp> 733struct __libcpp_base_of<_Bp, _Dp, true, true, true> : public true_type {}; 734 735template <class _Bp, class _Dp> 736struct __libcpp_base_of<_Bp, _Dp, true, true, false> 737 : public integral_constant<bool, __is_base_of_imp<_Bp, _Dp>::value> {}; 738 739template <class _Bp, class _Dp> 740struct _LIBCPP_VISIBLE is_base_of 741 : public __libcpp_base_of<typename remove_cv<_Bp>::type, typename remove_cv<_Dp>::type> 742{ 743}; 744 745// is_empty 746 747template <class _Tp> 748struct __is_empty1 749 : public _Tp 750{ 751 double _; 752}; 753 754struct __is_empty2 755{ 756 double _; 757}; 758 759template <class _Tp, bool = is_class<_Tp>::value> 760struct __libcpp_empty : public integral_constant<bool, sizeof(__is_empty1<_Tp>) == sizeof(__is_empty2)> {}; 761 762template <class _Tp> struct __libcpp_empty<_Tp, false> : public false_type {}; 763 764template <class _Tp> struct _LIBCPP_VISIBLE is_empty : public __libcpp_empty<_Tp> {}; 765 766// is_polymorphic 767 768template <class _Tp> struct __is_polymorphic1 : public _Tp {}; 769template <class _Tp> struct __is_polymorphic2 : public _Tp {virtual ~__is_polymorphic2() throw();}; 770 771template <class _Tp, bool = is_class<_Tp>::value> 772struct __libcpp_polymorphic 773 : public integral_constant<bool, sizeof(__is_polymorphic1<_Tp>) == sizeof(__is_polymorphic2<_Tp>)> {}; 774 775template <class _Tp> struct __libcpp_polymorphic<_Tp, false> : public false_type {}; 776 777template <class _Tp> struct _LIBCPP_VISIBLE is_polymorphic 778 : public __libcpp_polymorphic<_Tp> {}; 779 780// has_virtual_destructor 781 782#ifdef _LIBCPP_HAS_TYPE_TRAITS 783 784template <class _Tp> struct _LIBCPP_VISIBLE has_virtual_destructor 785 : public integral_constant<bool, __has_virtual_destructor(_Tp)> {}; 786 787#else // _LIBCPP_HAS_TYPE_TRAITS 788 789template <class _Tp> struct _LIBCPP_VISIBLE has_virtual_destructor 790 : public false_type {}; 791 792#endif // _LIBCPP_HAS_TYPE_TRAITS 793 794// alignment_of 795 796template <class _Tp> struct __alignment_of {_Tp _;}; 797 798template <class _Tp> struct _LIBCPP_VISIBLE alignment_of 799 : public integral_constant<size_t, __alignof__(__alignment_of<typename remove_all_extents<_Tp>::type>)> {}; 800 801// aligned_storage 802 803template <class _Hp, class _Tp> 804struct __type_list 805{ 806 typedef _Hp _Head; 807 typedef _Tp _Tail; 808}; 809 810struct __nat {}; 811 812template <class _Tp> 813struct __align_type 814{ 815 static const size_t value = alignment_of<_Tp>::value; 816 typedef _Tp type; 817}; 818 819struct __struct_double {long double _;}; 820struct __struct_double4 {double _[4];}; 821 822typedef 823 __type_list<__align_type<unsigned char>, 824 __type_list<__align_type<unsigned short>, 825 __type_list<__align_type<unsigned int>, 826 __type_list<__align_type<unsigned long>, 827 __type_list<__align_type<unsigned long long>, 828 __type_list<__align_type<double>, 829 __type_list<__align_type<long double>, 830 __type_list<__align_type<__struct_double>, 831 __type_list<__align_type<__struct_double4>, 832 __type_list<__align_type<int*>, 833 __nat 834 > > > > > > > > > > __all_types; 835 836template <class _TL, size_t _Align> struct __find_pod; 837 838template <class _Hp, size_t _Align> 839struct __find_pod<__type_list<_Hp, __nat>, _Align> 840{ 841 typedef typename conditional< 842 _Align == _Hp::value, 843 typename _Hp::type, 844 void 845 >::type type; 846}; 847 848template <class _Hp, class _Tp, size_t _Align> 849struct __find_pod<__type_list<_Hp, _Tp>, _Align> 850{ 851 typedef typename conditional< 852 _Align == _Hp::value, 853 typename _Hp::type, 854 typename __find_pod<_Tp, _Align>::type 855 >::type type; 856}; 857 858template <class _TL, size_t _Len> struct __find_max_align; 859 860template <class _Hp, size_t _Len> 861struct __find_max_align<__type_list<_Hp, __nat>, _Len> : public integral_constant<size_t, _Hp::value> {}; 862 863template <size_t _Len, size_t _A1, size_t _A2> 864struct __select_align 865{ 866private: 867 static const size_t __min = _A2 < _A1 ? _A2 : _A1; 868 static const size_t __max = _A1 < _A2 ? _A2 : _A1; 869public: 870 static const size_t value = _Len < __max ? __min : __max; 871}; 872 873template <class _Hp, class _Tp, size_t _Len> 874struct __find_max_align<__type_list<_Hp, _Tp>, _Len> 875 : public integral_constant<size_t, __select_align<_Len, _Hp::value, __find_max_align<_Tp, _Len>::value>::value> {}; 876 877template <size_t _Len, const size_t _Align = __find_max_align<__all_types, _Len>::value> 878struct _LIBCPP_VISIBLE aligned_storage 879{ 880 typedef typename __find_pod<__all_types, _Align>::type _Aligner; 881 static_assert(!is_void<_Aligner>::value, ""); 882 union type 883 { 884 _Aligner __align; 885 unsigned char __data[_Len]; 886 }; 887}; 888 889#define _CREATE_ALIGNED_STORAGE_SPECIALIZATION(n) \ 890template <size_t _Len>\ 891struct __attribute__ ((__visibility__("default"))) aligned_storage<_Len, n>\ 892{\ 893 struct type\ 894 {\ 895 unsigned char _[_Len];\ 896 } __attribute__((__aligned__(n)));\ 897} 898 899_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1); 900_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2); 901_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4); 902_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x8); 903_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x10); 904_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x20); 905_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x40); 906_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x80); 907_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x100); 908_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x200); 909_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x400); 910_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x800); 911_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x1000); 912_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x2000); 913_CREATE_ALIGNED_STORAGE_SPECIALIZATION(0x4000); 914 915#undef _CREATE_ALIGNED_STORAGE_SPECIALIZATION 916 917// __promote 918 919template <class _A1, class _A2 = void, class _A3 = void, 920 bool = (is_arithmetic<_A1>::value || is_void<_A1>::value) && 921 (is_arithmetic<_A2>::value || is_void<_A2>::value) && 922 (is_arithmetic<_A3>::value || is_void<_A3>::value)> 923class __promote {}; 924 925template <class _A1, class _A2, class _A3> 926class __promote<_A1, _A2, _A3, true> 927{ 928private: 929 typedef typename __promote<_A1>::type __type1; 930 typedef typename __promote<_A2>::type __type2; 931 typedef typename __promote<_A3>::type __type3; 932public: 933 typedef __typeof__(__type1() + __type2() + __type3()) type; 934}; 935 936template <class _A1, class _A2> 937class __promote<_A1, _A2, void, true> 938{ 939private: 940 typedef typename __promote<_A1>::type __type1; 941 typedef typename __promote<_A2>::type __type2; 942public: 943 typedef __typeof__(__type1() + __type2()) type; 944}; 945 946template <class _A1> 947class __promote<_A1, void, void, true> 948{ 949public: 950 typedef typename conditional<is_arithmetic<_A1>::value, 951 typename conditional<is_integral<_A1>::value, double, _A1>::type, 952 void 953 >::type type; 954}; 955 956#ifdef _LIBCPP_STORE_AS_OPTIMIZATION 957 958// __transform 959 960template <class _Tp, size_t = sizeof(_Tp), bool = is_scalar<_Tp>::value> struct __transform {typedef _Tp type;}; 961template <class _Tp> struct __transform<_Tp, 1, true> {typedef unsigned char type;}; 962template <class _Tp> struct __transform<_Tp, 2, true> {typedef unsigned short type;}; 963template <class _Tp> struct __transform<_Tp, 4, true> {typedef unsigned int type;}; 964template <class _Tp> struct __transform<_Tp, 8, true> {typedef unsigned long long type;}; 965 966#endif // _LIBCPP_STORE_AS_OPTIMIZATION 967 968// make_signed / make_unsigned 969 970typedef 971 __type_list<signed char, 972 __type_list<signed short, 973 __type_list<signed int, 974 __type_list<signed long, 975 __type_list<signed long long, 976 __nat 977 > > > > > __signed_types; 978 979typedef 980 __type_list<unsigned char, 981 __type_list<unsigned short, 982 __type_list<unsigned int, 983 __type_list<unsigned long, 984 __type_list<unsigned long long, 985 __nat 986 > > > > > __unsigned_types; 987 988template <class _TypeList, size_t _Size, bool = _Size <= sizeof(typename _TypeList::_Head)> struct __find_first; 989 990template <class _Hp, class _Tp, size_t _Size> 991struct __find_first<__type_list<_Hp, _Tp>, _Size, true> 992{ 993 typedef _Hp type; 994}; 995 996template <class _Hp, class _Tp, size_t _Size> 997struct __find_first<__type_list<_Hp, _Tp>, _Size, false> 998{ 999 typedef typename __find_first<_Tp, _Size>::type type; 1000}; 1001 1002template <class _Tp, class _Up, bool = is_const<typename remove_reference<_Tp>::type>::value, 1003 bool = is_volatile<typename remove_reference<_Tp>::type>::value> 1004struct __apply_cv 1005{ 1006 typedef _Up type; 1007}; 1008 1009template <class _Tp, class _Up> 1010struct __apply_cv<_Tp, _Up, true, false> 1011{ 1012 typedef const _Up type; 1013}; 1014 1015template <class _Tp, class _Up> 1016struct __apply_cv<_Tp, _Up, false, true> 1017{ 1018 typedef volatile _Up type; 1019}; 1020 1021template <class _Tp, class _Up> 1022struct __apply_cv<_Tp, _Up, true, true> 1023{ 1024 typedef const volatile _Up type; 1025}; 1026 1027template <class _Tp, class _Up> 1028struct __apply_cv<_Tp&, _Up, false, false> 1029{ 1030 typedef _Up& type; 1031}; 1032 1033template <class _Tp, class _Up> 1034struct __apply_cv<_Tp&, _Up, true, false> 1035{ 1036 typedef const _Up& type; 1037}; 1038 1039template <class _Tp, class _Up> 1040struct __apply_cv<_Tp&, _Up, false, true> 1041{ 1042 typedef volatile _Up& type; 1043}; 1044 1045template <class _Tp, class _Up> 1046struct __apply_cv<_Tp&, _Up, true, true> 1047{ 1048 typedef const volatile _Up& type; 1049}; 1050 1051template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 1052struct __make_signed {}; 1053 1054template <class _Tp> 1055struct __make_signed<_Tp, true> 1056{ 1057 typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; 1058}; 1059 1060template <> struct __make_signed<bool, true> {}; 1061template <> struct __make_signed< signed short, true> {typedef short type;}; 1062template <> struct __make_signed<unsigned short, true> {typedef short type;}; 1063template <> struct __make_signed< signed int, true> {typedef int type;}; 1064template <> struct __make_signed<unsigned int, true> {typedef int type;}; 1065template <> struct __make_signed< signed long, true> {typedef long type;}; 1066template <> struct __make_signed<unsigned long, true> {typedef long type;}; 1067template <> struct __make_signed< signed long long, true> {typedef long long type;}; 1068template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; 1069 1070template <class _Tp> 1071struct _LIBCPP_VISIBLE make_signed 1072{ 1073 typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type; 1074}; 1075 1076template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> 1077struct __make_unsigned {}; 1078 1079template <class _Tp> 1080struct __make_unsigned<_Tp, true> 1081{ 1082 typedef typename __find_first<__unsigned_types, sizeof(_Tp)>::type type; 1083}; 1084 1085template <> struct __make_unsigned<bool, true> {}; 1086template <> struct __make_unsigned< signed short, true> {typedef unsigned short type;}; 1087template <> struct __make_unsigned<unsigned short, true> {typedef unsigned short type;}; 1088template <> struct __make_unsigned< signed int, true> {typedef unsigned int type;}; 1089template <> struct __make_unsigned<unsigned int, true> {typedef unsigned int type;}; 1090template <> struct __make_unsigned< signed long, true> {typedef unsigned long type;}; 1091template <> struct __make_unsigned<unsigned long, true> {typedef unsigned long type;}; 1092template <> struct __make_unsigned< signed long long, true> {typedef unsigned long long type;}; 1093template <> struct __make_unsigned<unsigned long long, true> {typedef unsigned long long type;}; 1094 1095template <class _Tp> 1096struct _LIBCPP_VISIBLE make_unsigned 1097{ 1098 typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type; 1099}; 1100 1101#ifdef _LIBCPP_HAS_NO_VARIADICS 1102 1103template <class _Tp, class _Up = void, class V = void> 1104struct _LIBCPP_VISIBLE common_type 1105{ 1106public: 1107 typedef typename common_type<typename common_type<_Tp, _Up>::type, V>::type type; 1108}; 1109 1110template <class _Tp> 1111struct _LIBCPP_VISIBLE common_type<_Tp, void, void> 1112{ 1113public: 1114 typedef _Tp type; 1115}; 1116 1117template <class _Tp, class _Up> 1118struct _LIBCPP_VISIBLE common_type<_Tp, _Up, void> 1119{ 1120private: 1121#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1122 static _Tp&& __t(); 1123 static _Up&& __u(); 1124#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1125 static _Tp __t(); 1126 static _Up __u(); 1127#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1128public: 1129 typedef decltype(true ? __t() : __u()) type; 1130}; 1131 1132#else // _LIBCPP_HAS_NO_VARIADICS 1133 1134template <class ..._Tp> struct common_type; 1135 1136template <class _Tp> 1137struct _LIBCPP_VISIBLE common_type<_Tp> 1138{ 1139 typedef _Tp type; 1140}; 1141 1142template <class _Tp, class _Up> 1143struct _LIBCPP_VISIBLE common_type<_Tp, _Up> 1144{ 1145private: 1146 static _Tp&& __t(); 1147 static _Up&& __u(); 1148 static bool __f(); 1149public: 1150 typedef decltype(__f() ? __t() : __u()) type; 1151}; 1152 1153template <class _Tp, class _Up, class ..._Vp> 1154struct _LIBCPP_VISIBLE common_type<_Tp, _Up, _Vp...> 1155{ 1156 typedef typename common_type<typename common_type<_Tp, _Up>::type, _Vp...>::type type; 1157}; 1158 1159#endif // _LIBCPP_HAS_NO_VARIADICS 1160 1161// is_assignable 1162 1163template <class _Tp, class _Arg> 1164decltype((_STD::declval<_Tp>() = _STD::declval<_Arg>(), true_type())) 1165#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1166__is_assignable_test(_Tp&&, _Arg&&); 1167#else 1168__is_assignable_test(_Tp&, _Arg&); 1169#endif 1170 1171template <class _Arg> 1172false_type 1173#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1174__is_assignable_test(__any, _Arg&&); 1175#else 1176__is_assignable_test(__any, _Arg&); 1177#endif 1178 1179template <class _Tp, class _Arg> 1180struct __is_assignable_imp 1181 : public common_type 1182 < 1183 decltype(__is_assignable_test(declval<_Tp>(), declval<_Arg>())) 1184 >::type {}; 1185 1186template <class _Tp, class _Arg> 1187struct is_assignable 1188 : public __is_assignable_imp<_Tp, _Arg> {}; 1189 1190// is_copy_assignable 1191 1192template <class _Tp> struct _LIBCPP_VISIBLE is_copy_assignable 1193 : public is_assignable<_Tp&, const _Tp&> {}; 1194 1195// is_move_assignable 1196 1197template <class _Tp> struct _LIBCPP_VISIBLE is_move_assignable 1198#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1199 : public is_assignable<_Tp&, _Tp&&> {}; 1200#else 1201 : public is_copy_assignable<_Tp> {}; 1202#endif 1203 1204// is_destructible 1205 1206template <class _Tp> 1207struct __destructible_test 1208{ 1209 _Tp __t; 1210}; 1211 1212template <class _Tp> 1213decltype((_STD::declval<__destructible_test<_Tp> >().~__destructible_test<_Tp>(), true_type())) 1214#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1215__is_destructible_test(_Tp&&); 1216#else 1217__is_destructible_test(_Tp&); 1218#endif 1219 1220false_type 1221__is_destructible_test(__any); 1222 1223template <class _Tp, bool = is_void<_Tp>::value || is_abstract<_Tp>::value> 1224struct __destructible_imp 1225 : public common_type 1226 < 1227 decltype(__is_destructible_test(declval<_Tp>())) 1228 >::type {}; 1229 1230template <class _Tp> 1231struct __destructible_imp<_Tp, true> 1232 : public false_type {}; 1233 1234template <class _Tp> 1235struct is_destructible 1236 : public __destructible_imp<_Tp> {}; 1237 1238// move 1239 1240#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1241 1242template <class _Tp> 1243inline _LIBCPP_INLINE_VISIBILITY 1244typename remove_reference<_Tp>::type&& 1245move(_Tp&& __t) 1246{ 1247 typedef typename remove_reference<_Tp>::type _Up; 1248 return static_cast<_Up&&>(__t); 1249} 1250 1251template <class _Tp> 1252inline _LIBCPP_INLINE_VISIBILITY 1253_Tp&& 1254forward(typename std::remove_reference<_Tp>::type& __t) 1255{ 1256 return static_cast<_Tp&&>(__t); 1257} 1258 1259template <class _Tp> 1260inline _LIBCPP_INLINE_VISIBILITY 1261_Tp&& 1262forward(typename std::remove_reference<_Tp>::type&& __t) 1263{ 1264 static_assert(!std::is_lvalue_reference<_Tp>::value, 1265 "Can not forward an rvalue as an lvalue."); 1266 return static_cast<_Tp&&>(__t); 1267} 1268 1269#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1270 1271template <class _Tp> 1272class __rv 1273{ 1274 typedef typename remove_reference<_Tp>::type _Trr; 1275 _Trr& t_; 1276public: 1277 _LIBCPP_INLINE_VISIBILITY 1278 _Trr* operator->() {return &t_;} 1279 _LIBCPP_INLINE_VISIBILITY 1280 explicit __rv(_Trr& __t) : t_(__t) {} 1281}; 1282 1283template <class _Tp> 1284inline _LIBCPP_INLINE_VISIBILITY 1285typename enable_if 1286< 1287 !is_convertible<_Tp, __rv<_Tp> >::value, 1288 _Tp& 1289>::type 1290move(_Tp& __t) 1291{ 1292 return __t; 1293} 1294 1295template <class _Tp> 1296inline _LIBCPP_INLINE_VISIBILITY 1297typename enable_if 1298< 1299 is_convertible<_Tp, __rv<_Tp> >::value, 1300 _Tp 1301>::type 1302move(_Tp& __t) 1303{ 1304 return _Tp(__rv<_Tp>(__t)); 1305} 1306 1307template <class _Tp, class _Up> 1308inline _LIBCPP_INLINE_VISIBILITY 1309typename enable_if 1310< 1311 !is_convertible<_Tp, __rv<_Tp> >::value, 1312 typename add_lvalue_reference<_Tp>::type 1313>::type 1314forward(_Up& __t) 1315{ 1316 return __t; 1317} 1318 1319template <class _Tp, class _Up> 1320inline _LIBCPP_INLINE_VISIBILITY 1321typename enable_if 1322< 1323 !is_convertible<_Tp, __rv<_Tp> >::value, 1324 typename add_lvalue_reference<_Tp>::type 1325>::type 1326forward(const _Up& __t) 1327{ 1328 return __t; 1329} 1330 1331template <class _Tp, class _Up> 1332inline _LIBCPP_INLINE_VISIBILITY 1333typename enable_if 1334< 1335 is_convertible<_Tp, __rv<_Tp> >::value, 1336 _Tp 1337>::type 1338forward(_Up& __t) 1339{ 1340 return _Tp(__rv<_Tp>(__t)); 1341} 1342 1343template <class _Tp, class _Up> 1344inline _LIBCPP_INLINE_VISIBILITY 1345typename enable_if 1346< 1347 is_convertible<_Tp, __rv<_Tp> >::value, 1348 _Tp 1349>::type 1350forward(const _Up& __t) 1351{ 1352 return _Tp(__rv<_Tp>(__t)); 1353} 1354 1355#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 1356 1357template <class _Tp> 1358struct _LIBCPP_VISIBLE decay 1359{ 1360private: 1361 typedef typename remove_reference<_Tp>::type _Up; 1362public: 1363 typedef typename conditional 1364 < 1365 is_array<_Up>::value, 1366 typename remove_extent<_Up>::type*, 1367 typename conditional 1368 < 1369 is_function<_Up>::value, 1370 typename add_pointer<_Up>::type, 1371 typename remove_cv<_Up>::type 1372 >::type 1373 >::type type; 1374}; 1375 1376// result_of 1377 1378template <class> class result_of; 1379 1380template <class _Fn, bool> 1381class __result_of 1382{ 1383}; 1384 1385#ifndef _LIBCPP_HAS_NO_VARIADICS 1386 1387template <class _Fn, class ..._ArgTypes> 1388class __result_of<_Fn(_ArgTypes...), true> 1389{ 1390public: 1391 typedef decltype(declval<_Fn>()(declval<_ArgTypes>()...)) type; 1392}; 1393 1394template <class _MP, class _Tp, bool _IsMemberFunctionPtr, class ..._Args> 1395struct __result_of_mp {}; 1396 1397// member function pointer 1398 1399template <class _R, class _Class, class _Tp, class ..._Params, class ..._Args> 1400struct __result_of_mp<_R (_Class::*)(_Params...), _Tp, true, _Args...> 1401{ 1402 typedef _R type; 1403}; 1404 1405template <class _R, class _Class, class _Tp, class ..._Params, class ..._Args> 1406struct __result_of_mp<_R (_Class::*)(_Params...) const, _Tp, true, _Args...> 1407{ 1408 typedef _R type; 1409}; 1410 1411template <class _R, class _Class, class _Tp, class ..._Params, class ..._Args> 1412struct __result_of_mp<_R (_Class::*)(_Params...) volatile, _Tp, true, _Args...> 1413{ 1414 typedef _R type; 1415}; 1416 1417template <class _R, class _Class, class _Tp, class ..._Params, class ..._Args> 1418struct __result_of_mp<_R (_Class::*)(_Params...) const volatile, _Tp, true, _Args...> 1419{ 1420 typedef _R type; 1421}; 1422 1423// member data pointer 1424 1425template <class _MP, class _Tp, bool> 1426struct __result_of_mdp; 1427 1428template <class _R, class _Class, class _Tp> 1429struct __result_of_mdp<_R _Class::*, _Tp, false> 1430{ 1431 typedef typename __apply_cv<decltype(*_STD::declval<_Tp>()), _R>::type type; 1432}; 1433 1434template <class _R, class _Class, class _Tp> 1435struct __result_of_mdp<_R _Class::*, _Tp, true> 1436{ 1437 typedef typename __apply_cv<_Tp, _R>::type&& type; 1438}; 1439 1440template <class _R, class _Class, class _Tp> 1441struct __result_of_mp<_R _Class::*, _Tp, false> 1442 : public __result_of_mdp<_R _Class::*, _Tp, 1443 is_base_of<_Class, typename remove_reference<_Tp>::type>::value> 1444{ 1445}; 1446 1447template <class _Fn, class _Tp, class ..._ArgTypes> 1448class __result_of<_Fn(_Tp, _ArgTypes...), false> // _Fn must be member pointer 1449 : public __result_of_mp<_Fn, _Tp, is_member_function_pointer<_Fn>::value, 1450 _ArgTypes...> 1451{ 1452}; 1453 1454// result_of 1455 1456template <class _Fn, class ..._ArgTypes> 1457class _LIBCPP_VISIBLE result_of<_Fn(_ArgTypes...)> 1458 : public __result_of<_Fn(_ArgTypes...), 1459 is_class<typename remove_reference<_Fn>::type>::value || 1460 is_function<typename remove_pointer< 1461 typename remove_reference<_Fn>::type 1462 >::type 1463 >::value 1464 > 1465{ 1466}; 1467 1468#else // _LIBCPP_HAS_NO_VARIADICS 1469 1470template <class _Fn> 1471class __result_of<_Fn(), true> 1472{ 1473public: 1474 typedef decltype(declval<_Fn>()()) type; 1475}; 1476 1477template <class _Fn, class _A0> 1478class __result_of<_Fn(_A0), true> 1479{ 1480public: 1481 typedef decltype(declval<_Fn>()(declval<_A0>())) type; 1482}; 1483 1484template <class _Fn, class _A0, class _A1> 1485class __result_of<_Fn(_A0, _A1), true> 1486{ 1487public: 1488 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>())) type; 1489}; 1490 1491template <class _Fn, class _A0, class _A1, class _A2> 1492class __result_of<_Fn(_A0, _A1, _A2), true> 1493{ 1494public: 1495 typedef decltype(declval<_Fn>()(declval<_A0>(), declval<_A1>(), declval<_A2>())) type; 1496}; 1497 1498template <class _Fn> 1499class _LIBCPP_VISIBLE result_of<_Fn()> 1500 : public __result_of<_Fn(), 1501 is_class<typename remove_reference<_Fn>::type>::value || 1502 is_function<typename remove_pointer< 1503 typename remove_reference<_Fn>::type 1504 >::type 1505 >::value 1506 > 1507{ 1508}; 1509 1510template <class _Fn, class _A0> 1511class _LIBCPP_VISIBLE result_of<_Fn(_A0)> 1512 : public __result_of<_Fn(_A0), 1513 is_class<typename remove_reference<_Fn>::type>::value || 1514 is_function<typename remove_pointer< 1515 typename remove_reference<_Fn>::type 1516 >::type 1517 >::value 1518 > 1519{ 1520}; 1521 1522template <class _Fn, class _A0, class _A1> 1523class _LIBCPP_VISIBLE result_of<_Fn(_A0, _A1)> 1524 : public __result_of<_Fn(_A0, _A1), 1525 is_class<typename remove_reference<_Fn>::type>::value || 1526 is_function<typename remove_pointer< 1527 typename remove_reference<_Fn>::type 1528 >::type 1529 >::value 1530 > 1531{ 1532}; 1533 1534template <class _Fn, class _A0, class _A1, class _A2> 1535class _LIBCPP_VISIBLE result_of<_Fn(_A0, _A1, _A2)> 1536 : public __result_of<_Fn(_A0, _A1, _A2), 1537 is_class<typename remove_reference<_Fn>::type>::value || 1538 is_function<typename remove_pointer< 1539 typename remove_reference<_Fn>::type 1540 >::type 1541 >::value 1542 > 1543{ 1544}; 1545 1546#endif // _LIBCPP_HAS_NO_VARIADICS 1547 1548#ifndef _LIBCPP_HAS_NO_VARIADICS 1549 1550// template <class T, class... Args> struct is_constructible; 1551 1552// main is_constructible test 1553 1554template <class _Tp, class ..._Args> 1555decltype(_STD::move(_Tp(_STD::declval<_Args>()...)), true_type()) 1556__is_constructible_test(_Tp&&, _Args&& ...); 1557 1558template <class ..._Args> 1559false_type 1560__is_constructible_test(__any, _Args&& ...); 1561 1562template <bool, class _Tp, class... _Args> 1563struct __is_constructible // false, _Tp is not a scalar 1564 : public common_type 1565 < 1566 decltype(__is_constructible_test(declval<_Tp>(), declval<_Args>()...)) 1567 >::type 1568 {}; 1569 1570// function types are not constructible 1571 1572template <class _R, class... _A1, class... _A2> 1573struct __is_constructible<false, _R(_A1...), _A2...> 1574 : public false_type 1575 {}; 1576 1577// handle scalars and reference types 1578 1579// Scalars are default constructible, references are not 1580 1581template <class _Tp> 1582struct __is_constructible<true, _Tp> 1583 : public is_scalar<_Tp> 1584 {}; 1585 1586// Scalars and references are constructible from one arg if that arg is 1587// implicitly convertible to the scalar or reference. 1588 1589template <class _Tp> 1590struct __is_constructible_ref 1591{ 1592 true_type static __(_Tp); 1593 false_type static __(...); 1594}; 1595 1596template <class _Tp, class _A0> 1597struct __is_constructible<true, _Tp, _A0> 1598 : public common_type 1599 < 1600 decltype(__is_constructible_ref<_Tp>::__(declval<_A0>())) 1601 >::type 1602 {}; 1603 1604// Scalars and references are not constructible from multiple args. 1605 1606template <class _Tp, class _A0, class ..._Args> 1607struct __is_constructible<true, _Tp, _A0, _Args...> 1608 : public false_type 1609 {}; 1610 1611// Treat scalars and reference types separately 1612 1613template <bool, class _Tp, class... _Args> 1614struct __is_constructible_void_check 1615 : public __is_constructible<is_scalar<_Tp>::value || is_reference<_Tp>::value, 1616 _Tp, _Args...> 1617 {}; 1618 1619// If any of T or Args is void, is_constructible should be false 1620 1621template <class _Tp, class... _Args> 1622struct __is_constructible_void_check<true, _Tp, _Args...> 1623 : public false_type 1624 {}; 1625 1626template <class ..._Args> struct __contains_void; 1627 1628template <> struct __contains_void<> : false_type {}; 1629 1630template <class _A0, class ..._Args> 1631struct __contains_void<_A0, _Args...> 1632{ 1633 static const bool value = is_void<_A0>::value || 1634 __contains_void<_Args...>::value; 1635}; 1636 1637// is_constructible entry point 1638 1639template <class _Tp, class... _Args> 1640struct _LIBCPP_VISIBLE is_constructible 1641 : public __is_constructible_void_check<__contains_void<_Tp, _Args...>::value 1642 || is_abstract<_Tp>::value, 1643 _Tp, _Args...> 1644 {}; 1645 1646// Array types are default constructible if their element type 1647// is default constructible 1648 1649template <class _A, size_t _N> 1650struct __is_constructible<false, _A[_N]> 1651 : public is_constructible<typename remove_all_extents<_A>::type> 1652 {}; 1653 1654// Otherwise array types are not constructible by this syntax 1655 1656template <class _A, size_t _N, class ..._Args> 1657struct __is_constructible<false, _A[_N], _Args...> 1658 : public false_type 1659 {}; 1660 1661// Incomplete array types are not constructible 1662 1663template <class _A, class ..._Args> 1664struct __is_constructible<false, _A[], _Args...> 1665 : public false_type 1666 {}; 1667 1668#else // _LIBCPP_HAS_NO_VARIADICS 1669 1670// template <class T> struct is_constructible0; 1671 1672// main is_constructible0 test 1673 1674template <class _Tp> 1675decltype((_Tp(), true_type())) 1676__is_constructible0_test(_Tp&); 1677 1678false_type 1679__is_constructible0_test(__any); 1680 1681template <class _Tp, class _A0> 1682decltype((_Tp(_STD::declval<_A0>()), true_type())) 1683__is_constructible1_test(_Tp&, _A0&); 1684 1685template <class _A0> 1686false_type 1687__is_constructible1_test(__any, _A0&); 1688 1689template <class _Tp, class _A0, class _A1> 1690decltype((_Tp(_STD::declval<_A0>(), _STD::declval<_A1>()), true_type())) 1691__is_constructible2_test(_Tp&, _A0&, _A1&); 1692 1693template <class _A0, class _A1> 1694false_type 1695__is_constructible2_test(__any, _A0&, _A1&); 1696 1697template <bool, class _Tp> 1698struct __is_constructible0_imp // false, _Tp is not a scalar 1699 : public common_type 1700 < 1701 decltype(__is_constructible0_test(declval<_Tp&>())) 1702 >::type 1703 {}; 1704 1705template <bool, class _Tp, class _A0> 1706struct __is_constructible1_imp // false, _Tp is not a scalar 1707 : public common_type 1708 < 1709 decltype(__is_constructible1_test(declval<_Tp&>(), declval<_A0&>())) 1710 >::type 1711 {}; 1712 1713template <bool, class _Tp, class _A0, class _A1> 1714struct __is_constructible2_imp // false, _Tp is not a scalar 1715 : public common_type 1716 < 1717 decltype(__is_constructible2_test(declval<_Tp&>(), declval<_A0>(), declval<_A1>())) 1718 >::type 1719 {}; 1720 1721// handle scalars and reference types 1722 1723// Scalars are default constructible, references are not 1724 1725template <class _Tp> 1726struct __is_constructible0_imp<true, _Tp> 1727 : public is_scalar<_Tp> 1728 {}; 1729 1730template <class _Tp, class _A0> 1731struct __is_constructible1_imp<true, _Tp, _A0> 1732 : public is_convertible<_A0, _Tp> 1733 {}; 1734 1735template <class _Tp, class _A0, class _A1> 1736struct __is_constructible2_imp<true, _Tp, _A0, _A1> 1737 : public false_type 1738 {}; 1739 1740// Treat scalars and reference types separately 1741 1742template <bool, class _Tp> 1743struct __is_constructible0_void_check 1744 : public __is_constructible0_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 1745 _Tp> 1746 {}; 1747 1748template <bool, class _Tp, class _A0> 1749struct __is_constructible1_void_check 1750 : public __is_constructible1_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 1751 _Tp, _A0> 1752 {}; 1753 1754template <bool, class _Tp, class _A0, class _A1> 1755struct __is_constructible2_void_check 1756 : public __is_constructible2_imp<is_scalar<_Tp>::value || is_reference<_Tp>::value, 1757 _Tp, _A0, _A1> 1758 {}; 1759 1760// If any of T or Args is void, is_constructible should be false 1761 1762template <class _Tp> 1763struct __is_constructible0_void_check<true, _Tp> 1764 : public false_type 1765 {}; 1766 1767template <class _Tp, class _A0> 1768struct __is_constructible1_void_check<true, _Tp, _A0> 1769 : public false_type 1770 {}; 1771 1772template <class _Tp, class _A0, class _A1> 1773struct __is_constructible2_void_check<true, _Tp, _A0, _A1> 1774 : public false_type 1775 {}; 1776 1777// is_constructible entry point 1778 1779namespace __is_construct 1780{ 1781 1782struct __nat {}; 1783 1784} 1785 1786template <class _Tp, class _A0 = __is_construct::__nat, 1787 class _A1 = __is_construct::__nat> 1788struct _LIBCPP_VISIBLE is_constructible 1789 : public __is_constructible2_void_check<is_void<_Tp>::value 1790 || is_abstract<_Tp>::value 1791 || is_function<_Tp>::value 1792 || is_void<_A0>::value 1793 || is_void<_A1>::value, 1794 _Tp, _A0, _A1> 1795 {}; 1796 1797template <class _Tp> 1798struct _LIBCPP_VISIBLE is_constructible<_Tp, __is_construct::__nat, __is_construct::__nat> 1799 : public __is_constructible0_void_check<is_void<_Tp>::value 1800 || is_abstract<_Tp>::value 1801 || is_function<_Tp>::value, 1802 _Tp> 1803 {}; 1804 1805template <class _Tp, class _A0> 1806struct _LIBCPP_VISIBLE is_constructible<_Tp, _A0, __is_construct::__nat> 1807 : public __is_constructible1_void_check<is_void<_Tp>::value 1808 || is_abstract<_Tp>::value 1809 || is_function<_Tp>::value 1810 || is_void<_A0>::value, 1811 _Tp, _A0> 1812 {}; 1813 1814// Array types are default constructible if their element type 1815// is default constructible 1816 1817template <class _A, size_t _N> 1818struct __is_constructible0_imp<false, _A[_N]> 1819 : public is_constructible<typename remove_all_extents<_A>::type> 1820 {}; 1821 1822template <class _A, size_t _N, class _A0> 1823struct __is_constructible1_imp<false, _A[_N], _A0> 1824 : public false_type 1825 {}; 1826 1827template <class _A, size_t _N, class _A0, class _A1> 1828struct __is_constructible2_imp<false, _A[_N], _A0, _A1> 1829 : public false_type 1830 {}; 1831 1832// Incomplete array types are not constructible 1833 1834template <class _A> 1835struct __is_constructible0_imp<false, _A[]> 1836 : public false_type 1837 {}; 1838 1839template <class _A, class _A0> 1840struct __is_constructible1_imp<false, _A[], _A0> 1841 : public false_type 1842 {}; 1843 1844template <class _A, class _A0, class _A1> 1845struct __is_constructible2_imp<false, _A[], _A0, _A1> 1846 : public false_type 1847 {}; 1848 1849#endif // _LIBCPP_HAS_NO_VARIADICS 1850 1851// is_default_constructible 1852 1853template <class _Tp> 1854struct _LIBCPP_VISIBLE is_default_constructible 1855 : public is_constructible<_Tp> 1856 {}; 1857 1858// is_copy_constructible 1859 1860template <class _Tp> 1861struct _LIBCPP_VISIBLE is_copy_constructible 1862 : public is_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type> 1863 {}; 1864 1865// is_move_constructible 1866 1867template <class _Tp> 1868struct _LIBCPP_VISIBLE is_move_constructible 1869#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1870 : public is_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 1871#else 1872 : public is_copy_constructible<_Tp> 1873#endif 1874 {}; 1875 1876// is_trivially_constructible 1877 1878#ifndef _LIBCPP_HAS_NO_VARIADICS 1879 1880template <class _Tp, class... _Args> 1881struct _LIBCPP_VISIBLE is_trivially_constructible 1882 : false_type 1883{ 1884}; 1885 1886template <class _Tp> 1887struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp> 1888#ifdef _LIBCPP_HAS_TYPE_TRAITS 1889 : integral_constant<bool, __has_trivial_constructor(_Tp)> 1890#else 1891 : integral_constant<bool, is_scalar<_Tp>::value> 1892#endif 1893{ 1894}; 1895 1896template <class _Tp> 1897#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 1898struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp&&> 1899#else 1900struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp> 1901#endif 1902#ifdef _LIBCPP_HAS_TYPE_TRAITS 1903 : integral_constant<bool, __has_trivial_copy(_Tp)> 1904#else 1905 : integral_constant<bool, is_scalar<_Tp>::value> 1906#endif 1907{ 1908}; 1909 1910template <class _Tp> 1911struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, const _Tp&> 1912#ifdef _LIBCPP_HAS_TYPE_TRAITS 1913 : integral_constant<bool, __has_trivial_copy(_Tp)> 1914#else 1915 : integral_constant<bool, is_scalar<_Tp>::value> 1916#endif 1917{ 1918}; 1919 1920template <class _Tp> 1921struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp&> 1922#ifdef _LIBCPP_HAS_TYPE_TRAITS 1923 : integral_constant<bool, __has_trivial_copy(_Tp)> 1924#else 1925 : integral_constant<bool, is_scalar<_Tp>::value> 1926#endif 1927{ 1928}; 1929 1930#else // _LIBCPP_HAS_NO_VARIADICS 1931 1932template <class _Tp, class _A0 = __is_construct::__nat, 1933 class _A1 = __is_construct::__nat> 1934struct _LIBCPP_VISIBLE is_trivially_constructible 1935 : false_type 1936{ 1937}; 1938 1939template <class _Tp> 1940struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, __is_construct::__nat, 1941 __is_construct::__nat> 1942#ifdef _LIBCPP_HAS_TYPE_TRAITS 1943 : integral_constant<bool, __has_trivial_constructor(_Tp)> 1944#else 1945 : integral_constant<bool, is_scalar<_Tp>::value> 1946#endif 1947{ 1948}; 1949 1950template <class _Tp> 1951struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp, 1952 __is_construct::__nat> 1953#ifdef _LIBCPP_HAS_TYPE_TRAITS 1954 : integral_constant<bool, __has_trivial_copy(_Tp)> 1955#else 1956 : integral_constant<bool, is_scalar<_Tp>::value> 1957#endif 1958{ 1959}; 1960 1961template <class _Tp> 1962struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, const _Tp&, 1963 __is_construct::__nat> 1964#ifdef _LIBCPP_HAS_TYPE_TRAITS 1965 : integral_constant<bool, __has_trivial_copy(_Tp)> 1966#else 1967 : integral_constant<bool, is_scalar<_Tp>::value> 1968#endif 1969{ 1970}; 1971 1972template <class _Tp> 1973struct _LIBCPP_VISIBLE is_trivially_constructible<_Tp, _Tp&, 1974 __is_construct::__nat> 1975#ifdef _LIBCPP_HAS_TYPE_TRAITS 1976 : integral_constant<bool, __has_trivial_copy(_Tp)> 1977#else 1978 : integral_constant<bool, is_scalar<_Tp>::value> 1979#endif 1980{ 1981}; 1982 1983#endif // _LIBCPP_HAS_NO_VARIADICS 1984 1985// is_trivially_default_constructible 1986 1987template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_default_constructible 1988 : public is_trivially_constructible<_Tp> 1989 {}; 1990 1991// is_trivially_copy_constructible 1992 1993template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_copy_constructible 1994 : public is_trivially_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type> 1995 {}; 1996 1997// is_trivially_move_constructible 1998 1999template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_move_constructible 2000#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2001 : public is_trivially_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 2002#else 2003 : public is_trivially_copy_constructible<_Tp> 2004#endif 2005 {}; 2006 2007// is_trivially_assignable 2008 2009template <class _Tp, class _Arg> 2010struct is_trivially_assignable 2011 : public false_type {}; 2012 2013template <class _Tp> 2014struct is_trivially_assignable<_Tp&, _Tp> 2015#ifdef _LIBCPP_HAS_TYPE_TRAITS 2016 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2017#else 2018 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2019#endif 2020 2021template <class _Tp> 2022struct is_trivially_assignable<_Tp&, _Tp&> 2023#ifdef _LIBCPP_HAS_TYPE_TRAITS 2024 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2025#else 2026 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2027#endif 2028 2029template <class _Tp> 2030struct is_trivially_assignable<_Tp&, const _Tp&> 2031#ifdef _LIBCPP_HAS_TYPE_TRAITS 2032 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2033#else 2034 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2035#endif 2036 2037#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2038 2039template <class _Tp> 2040struct is_trivially_assignable<_Tp&, _Tp&&> 2041#ifdef _LIBCPP_HAS_TYPE_TRAITS 2042 : integral_constant<bool, __has_trivial_assign(_Tp)> {}; 2043#else 2044 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2045#endif 2046 2047#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 2048 2049// is_trivially_copy_assignable 2050 2051template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_copy_assignable 2052 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 2053 const typename add_lvalue_reference<_Tp>::type> 2054 {}; 2055 2056// is_trivially_move_assignable 2057 2058template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_move_assignable 2059 : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type, 2060#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2061 typename add_rvalue_reference<_Tp>::type> 2062#else 2063 typename add_lvalue_reference<_Tp>::type> 2064#endif 2065 {}; 2066 2067// is_trivially_destructible 2068 2069#ifdef _LIBCPP_HAS_TYPE_TRAITS 2070 2071template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_destructible 2072 : public integral_constant<bool, __has_trivial_destructor(_Tp)> {}; 2073 2074#else // _LIBCPP_HAS_TYPE_TRAITS 2075 2076template <class _Tp> struct __libcpp_trivial_destructor 2077 : public integral_constant<bool, is_scalar<_Tp>::value || 2078 is_reference<_Tp>::value> {}; 2079 2080template <class _Tp> struct _LIBCPP_VISIBLE is_trivially_destructible 2081 : public __libcpp_trivial_destructor<typename remove_all_extents<_Tp>::type> {}; 2082 2083#endif // _LIBCPP_HAS_TYPE_TRAITS 2084 2085// is_nothrow_constructible 2086 2087#ifndef _LIBCPP_HAS_NO_VARIADICS 2088 2089template <class _Tp, class... _Args> 2090struct _LIBCPP_VISIBLE is_nothrow_constructible 2091 : false_type 2092{ 2093}; 2094 2095template <class _Tp> 2096struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp> 2097#ifdef _LIBCPP_HAS_TYPE_TRAITS 2098 : integral_constant<bool, __has_nothrow_constructor(_Tp)> 2099#else 2100 : integral_constant<bool, is_scalar<_Tp>::value> 2101#endif 2102{ 2103}; 2104 2105template <class _Tp> 2106#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2107struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp&&> 2108#else 2109struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp> 2110#endif 2111#ifdef _LIBCPP_HAS_TYPE_TRAITS 2112 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2113#else 2114 : integral_constant<bool, is_scalar<_Tp>::value> 2115#endif 2116{ 2117}; 2118 2119template <class _Tp> 2120struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, const _Tp&> 2121#ifdef _LIBCPP_HAS_TYPE_TRAITS 2122 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2123#else 2124 : integral_constant<bool, is_scalar<_Tp>::value> 2125#endif 2126{ 2127}; 2128 2129template <class _Tp> 2130struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp&> 2131#ifdef _LIBCPP_HAS_TYPE_TRAITS 2132 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2133#else 2134 : integral_constant<bool, is_scalar<_Tp>::value> 2135#endif 2136{ 2137}; 2138 2139#else // _LIBCPP_HAS_NO_VARIADICS 2140 2141template <class _Tp, class _A0 = __is_construct::__nat, 2142 class _A1 = __is_construct::__nat> 2143struct _LIBCPP_VISIBLE is_nothrow_constructible 2144 : false_type 2145{ 2146}; 2147 2148template <class _Tp> 2149struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, __is_construct::__nat, 2150 __is_construct::__nat> 2151#ifdef _LIBCPP_HAS_TYPE_TRAITS 2152 : integral_constant<bool, __has_nothrow_constructor(_Tp)> 2153#else 2154 : integral_constant<bool, is_scalar<_Tp>::value> 2155#endif 2156{ 2157}; 2158 2159template <class _Tp> 2160struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp, 2161 __is_construct::__nat> 2162#ifdef _LIBCPP_HAS_TYPE_TRAITS 2163 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2164#else 2165 : integral_constant<bool, is_scalar<_Tp>::value> 2166#endif 2167{ 2168}; 2169 2170template <class _Tp> 2171struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, const _Tp&, 2172 __is_construct::__nat> 2173#ifdef _LIBCPP_HAS_TYPE_TRAITS 2174 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2175#else 2176 : integral_constant<bool, is_scalar<_Tp>::value> 2177#endif 2178{ 2179}; 2180 2181template <class _Tp> 2182struct _LIBCPP_VISIBLE is_nothrow_constructible<_Tp, _Tp&, 2183 __is_construct::__nat> 2184#ifdef _LIBCPP_HAS_TYPE_TRAITS 2185 : integral_constant<bool, __has_nothrow_copy(_Tp)> 2186#else 2187 : integral_constant<bool, is_scalar<_Tp>::value> 2188#endif 2189{ 2190}; 2191 2192#endif // _LIBCPP_HAS_NO_VARIADICS 2193 2194// is_nothrow_default_constructible 2195 2196template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_default_constructible 2197 : public is_nothrow_constructible<_Tp> 2198 {}; 2199 2200// is_nothrow_copy_constructible 2201 2202template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_copy_constructible 2203 : public is_nothrow_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type> 2204 {}; 2205 2206// is_nothrow_move_constructible 2207 2208template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_move_constructible 2209#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2210 : public is_nothrow_constructible<_Tp, typename add_rvalue_reference<_Tp>::type> 2211#else 2212 : public is_nothrow_copy_constructible<_Tp> 2213#endif 2214 {}; 2215 2216// is_nothrow_assignable 2217 2218template <class _Tp, class _Arg> 2219struct is_nothrow_assignable 2220 : public false_type {}; 2221 2222template <class _Tp> 2223struct is_nothrow_assignable<_Tp&, _Tp> 2224#ifdef _LIBCPP_HAS_TYPE_TRAITS 2225 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2226#else 2227 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2228#endif 2229 2230template <class _Tp> 2231struct is_nothrow_assignable<_Tp&, _Tp&> 2232#ifdef _LIBCPP_HAS_TYPE_TRAITS 2233 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2234#else 2235 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2236#endif 2237 2238template <class _Tp> 2239struct is_nothrow_assignable<_Tp&, const _Tp&> 2240#ifdef _LIBCPP_HAS_TYPE_TRAITS 2241 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2242#else 2243 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2244#endif 2245 2246#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2247 2248template <class _Tp> 2249struct is_nothrow_assignable<_Tp&, _Tp&&> 2250#ifdef _LIBCPP_HAS_TYPE_TRAITS 2251 : integral_constant<bool, __has_nothrow_assign(_Tp)> {}; 2252#else 2253 : integral_constant<bool, is_scalar<_Tp>::value> {}; 2254#endif 2255 2256#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 2257 2258// is_nothrow_copy_assignable 2259 2260template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_copy_assignable 2261 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 2262 const typename add_lvalue_reference<_Tp>::type> 2263 {}; 2264 2265// is_nothrow_move_assignable 2266 2267template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_move_assignable 2268 : public is_nothrow_assignable<typename add_lvalue_reference<_Tp>::type, 2269#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 2270 typename add_rvalue_reference<_Tp>::type> 2271#else 2272 typename add_lvalue_reference<_Tp>::type> 2273#endif 2274 {}; 2275 2276// is_nothrow_destructible 2277 2278template <class _Tp> struct __libcpp_nothrow_destructor 2279 : public integral_constant<bool, is_scalar<_Tp>::value || 2280 is_reference<_Tp>::value> {}; 2281 2282template <class _Tp> struct _LIBCPP_VISIBLE is_nothrow_destructible 2283 : public __libcpp_nothrow_destructor<typename remove_all_extents<_Tp>::type> {}; 2284 2285// is_pod 2286 2287#ifdef _LIBCPP_HAS_TYPE_TRAITS 2288 2289template <class _Tp> struct _LIBCPP_VISIBLE is_pod 2290 : public integral_constant<bool, __is_pod(_Tp)> {}; 2291 2292#else // _LIBCPP_HAS_TYPE_TRAITS 2293 2294template <class _Tp> struct _LIBCPP_VISIBLE is_pod 2295 : public integral_constant<bool, is_trivially_default_constructible<_Tp>::value && 2296 is_trivially_copy_constructible<_Tp>::value && 2297 is_trivially_copy_assignable<_Tp>::value && 2298 is_trivially_destructible<_Tp>::value> {}; 2299 2300#endif // _LIBCPP_HAS_TYPE_TRAITS 2301 2302template <class _Tp> 2303inline _LIBCPP_INLINE_VISIBILITY 2304void 2305swap(_Tp& __x, _Tp& __y) 2306{ 2307 _Tp __t(_STD::move(__x)); 2308 __x = _STD::move(__y); 2309 __y = _STD::move(__t); 2310} 2311 2312_LIBCPP_END_NAMESPACE_STD 2313 2314#endif // _LIBCPP_TYPE_TRAITS 2315