1// -*- C++ -*- 2//===--------------------------- tuple ------------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is distributed under the University of Illinois Open Source 7// License. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_TUPLE 12#define _LIBCPP_TUPLE 13 14/* 15 tuple synopsis 16 17namespace std 18{ 19 20template <class... T> 21class tuple { 22public: 23 constexpr tuple(); 24 explicit tuple(const T&...); // constexpr in C++14 25 template <class... U> 26 explicit tuple(U&&...); // constexpr in C++14 27 tuple(const tuple&) = default; 28 tuple(tuple&&) = default; 29 template <class... U> 30 tuple(const tuple<U...>&); // constexpr in C++14 31 template <class... U> 32 tuple(tuple<U...>&&); // constexpr in C++14 33 template <class U1, class U2> 34 tuple(const pair<U1, U2>&); // iff sizeof...(T) == 2 // constexpr in C++14 35 template <class U1, class U2> 36 tuple(pair<U1, U2>&&); // iff sizeof...(T) == 2 // constexpr in C++14 37 38 // allocator-extended constructors 39 template <class Alloc> 40 tuple(allocator_arg_t, const Alloc& a); 41 template <class Alloc> 42 tuple(allocator_arg_t, const Alloc& a, const T&...); 43 template <class Alloc, class... U> 44 tuple(allocator_arg_t, const Alloc& a, U&&...); 45 template <class Alloc> 46 tuple(allocator_arg_t, const Alloc& a, const tuple&); 47 template <class Alloc> 48 tuple(allocator_arg_t, const Alloc& a, tuple&&); 49 template <class Alloc, class... U> 50 tuple(allocator_arg_t, const Alloc& a, const tuple<U...>&); 51 template <class Alloc, class... U> 52 tuple(allocator_arg_t, const Alloc& a, tuple<U...>&&); 53 template <class Alloc, class U1, class U2> 54 tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&); 55 template <class Alloc, class U1, class U2> 56 tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&&); 57 58 tuple& operator=(const tuple&); 59 tuple& 60 operator=(tuple&&) noexcept(AND(is_nothrow_move_assignable<T>::value ...)); 61 template <class... U> 62 tuple& operator=(const tuple<U...>&); 63 template <class... U> 64 tuple& operator=(tuple<U...>&&); 65 template <class U1, class U2> 66 tuple& operator=(const pair<U1, U2>&); // iff sizeof...(T) == 2 67 template <class U1, class U2> 68 tuple& operator=(pair<U1, U2>&&); //iffsizeof...(T) == 2 69 70 void swap(tuple&) noexcept(AND(swap(declval<T&>(), declval<T&>())...)); 71}; 72 73const unspecified ignore; 74 75template <class... T> tuple<V...> make_tuple(T&&...); // constexpr in C++14 76template <class... T> tuple<ATypes...> forward_as_tuple(T&&...) noexcept; // constexpr in C++14 77template <class... T> tuple<T&...> tie(T&...) noexcept; // constexpr in C++14 78template <class... Tuples> tuple<CTypes...> tuple_cat(Tuples&&... tpls); // constexpr in C++14 79 80// [tuple.apply], calling a function with a tuple of arguments: 81template <class F, class Tuple> 82 constexpr decltype(auto) apply(F&& f, Tuple&& t); // C++17 83template <class T, class Tuple> 84 constexpr T make_from_tuple(Tuple&& t); // C++17 85 86// 20.4.1.4, tuple helper classes: 87template <class T> class tuple_size; // undefined 88template <class... T> class tuple_size<tuple<T...>>; 89template <class T> 90 constexpr size_t tuple_size_v = tuple_size<T>::value; // C++17 91template <size_t I, class T> class tuple_element; // undefined 92template <size_t I, class... T> class tuple_element<I, tuple<T...>>; 93template <size_t I, class T> 94 using tuple_element_t = typename tuple_element <I, T>::type; // C++14 95 96// 20.4.1.5, element access: 97template <size_t I, class... T> 98 typename tuple_element<I, tuple<T...>>::type& 99 get(tuple<T...>&) noexcept; // constexpr in C++14 100template <size_t I, class... T> 101 const typename tuple_element<I, tuple<T...>>::type& 102 get(const tuple<T...>&) noexcept; // constexpr in C++14 103template <size_t I, class... T> 104 typename tuple_element<I, tuple<T...>>::type&& 105 get(tuple<T...>&&) noexcept; // constexpr in C++14 106template <size_t I, class... T> 107 const typename tuple_element<I, tuple<T...>>::type&& 108 get(const tuple<T...>&&) noexcept; // constexpr in C++14 109 110template <class T1, class... T> 111 constexpr T1& get(tuple<T...>&) noexcept; // C++14 112template <class T1, class... T> 113 constexpr const T1& get(const tuple<T...>&) noexcept; // C++14 114template <class T1, class... T> 115 constexpr T1&& get(tuple<T...>&&) noexcept; // C++14 116template <class T1, class... T> 117 constexpr const T1&& get(const tuple<T...>&&) noexcept; // C++14 118 119// 20.4.1.6, relational operators: 120template<class... T, class... U> bool operator==(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 121template<class... T, class... U> bool operator<(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 122template<class... T, class... U> bool operator!=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 123template<class... T, class... U> bool operator>(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 124template<class... T, class... U> bool operator<=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 125template<class... T, class... U> bool operator>=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 126 127template <class... Types, class Alloc> 128 struct uses_allocator<tuple<Types...>, Alloc>; 129 130template <class... Types> 131 void 132 swap(tuple<Types...>& x, tuple<Types...>& y) noexcept(noexcept(x.swap(y))); 133 134} // std 135 136*/ 137 138#include <__config> 139#include <__tuple> 140#include <cstddef> 141#include <type_traits> 142#include <__functional_base> 143#include <utility> 144 145#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 146#pragma GCC system_header 147#endif 148 149_LIBCPP_BEGIN_NAMESPACE_STD 150 151#ifndef _LIBCPP_HAS_NO_VARIADICS 152 153 154// __tuple_leaf 155 156template <size_t _Ip, class _Hp, 157 bool=is_empty<_Hp>::value && !__libcpp_is_final<_Hp>::value 158 > 159class __tuple_leaf; 160 161template <size_t _Ip, class _Hp, bool _Ep> 162inline _LIBCPP_INLINE_VISIBILITY 163void swap(__tuple_leaf<_Ip, _Hp, _Ep>& __x, __tuple_leaf<_Ip, _Hp, _Ep>& __y) 164 _NOEXCEPT_(__is_nothrow_swappable<_Hp>::value) 165{ 166 swap(__x.get(), __y.get()); 167} 168 169template <size_t _Ip, class _Hp, bool> 170class __tuple_leaf 171{ 172 _Hp value; 173 174 template <class _Tp> 175 static constexpr bool __can_bind_reference() { 176 using _RawTp = typename remove_reference<_Tp>::type; 177 using _RawHp = typename remove_reference<_Hp>::type; 178 using _CheckLValueArg = integral_constant<bool, 179 is_lvalue_reference<_Tp>::value 180 || is_same<_RawTp, reference_wrapper<_RawHp>>::value 181 || is_same<_RawTp, reference_wrapper<typename remove_const<_RawHp>::type>>::value 182 >; 183 return !is_reference<_Hp>::value 184 || (is_lvalue_reference<_Hp>::value && _CheckLValueArg::value) 185 || (is_rvalue_reference<_Hp>::value && !is_lvalue_reference<_Tp>::value); 186 } 187 188 __tuple_leaf& operator=(const __tuple_leaf&); 189public: 190 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() 191 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) : value() 192 {static_assert(!is_reference<_Hp>::value, 193 "Attempted to default construct a reference element in a tuple");} 194 195 template <class _Alloc> 196 _LIBCPP_INLINE_VISIBILITY 197 __tuple_leaf(integral_constant<int, 0>, const _Alloc&) 198 : value() 199 {static_assert(!is_reference<_Hp>::value, 200 "Attempted to default construct a reference element in a tuple");} 201 202 template <class _Alloc> 203 _LIBCPP_INLINE_VISIBILITY 204 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a) 205 : value(allocator_arg_t(), __a) 206 {static_assert(!is_reference<_Hp>::value, 207 "Attempted to default construct a reference element in a tuple");} 208 209 template <class _Alloc> 210 _LIBCPP_INLINE_VISIBILITY 211 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) 212 : value(__a) 213 {static_assert(!is_reference<_Hp>::value, 214 "Attempted to default construct a reference element in a tuple");} 215 216 template <class _Tp, 217 class = typename enable_if< 218 __lazy_and< 219 __lazy_not<is_same<typename decay<_Tp>::type, __tuple_leaf>> 220 , is_constructible<_Hp, _Tp> 221 >::value 222 >::type 223 > 224 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 225 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value)) 226 : value(_VSTD::forward<_Tp>(__t)) 227 {static_assert(__can_bind_reference<_Tp>(), 228 "Attempted to construct a reference element in a tuple with an rvalue");} 229 230 template <class _Tp, class _Alloc> 231 _LIBCPP_INLINE_VISIBILITY 232 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) 233 : value(_VSTD::forward<_Tp>(__t)) 234 {static_assert(__can_bind_reference<_Tp>(), 235 "Attempted to construct a reference element in a tuple with an rvalue");} 236 237 template <class _Tp, class _Alloc> 238 _LIBCPP_INLINE_VISIBILITY 239 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) 240 : value(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) 241 {static_assert(!is_reference<_Hp>::value, 242 "Attempted to uses-allocator construct a reference element in a tuple");} 243 244 template <class _Tp, class _Alloc> 245 _LIBCPP_INLINE_VISIBILITY 246 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) 247 : value(_VSTD::forward<_Tp>(__t), __a) 248 {static_assert(!is_reference<_Hp>::value, 249 "Attempted to uses-allocator construct a reference element in a tuple");} 250 251 __tuple_leaf(const __tuple_leaf& __t) = default; 252 __tuple_leaf(__tuple_leaf&& __t) = default; 253 254 template <class _Tp> 255 _LIBCPP_INLINE_VISIBILITY 256 __tuple_leaf& 257 operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value)) 258 { 259 value = _VSTD::forward<_Tp>(__t); 260 return *this; 261 } 262 263 _LIBCPP_INLINE_VISIBILITY 264 int swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value) 265 { 266 _VSTD::swap(*this, __t); 267 return 0; 268 } 269 270 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return value;} 271 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return value;} 272}; 273 274template <size_t _Ip, class _Hp> 275class __tuple_leaf<_Ip, _Hp, true> 276 : private _Hp 277{ 278 279 __tuple_leaf& operator=(const __tuple_leaf&); 280public: 281 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() 282 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {} 283 284 template <class _Alloc> 285 _LIBCPP_INLINE_VISIBILITY 286 __tuple_leaf(integral_constant<int, 0>, const _Alloc&) {} 287 288 template <class _Alloc> 289 _LIBCPP_INLINE_VISIBILITY 290 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a) 291 : _Hp(allocator_arg_t(), __a) {} 292 293 template <class _Alloc> 294 _LIBCPP_INLINE_VISIBILITY 295 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) 296 : _Hp(__a) {} 297 298 template <class _Tp, 299 class = typename enable_if< 300 __lazy_and< 301 __lazy_not<is_same<typename decay<_Tp>::type, __tuple_leaf>> 302 , is_constructible<_Hp, _Tp> 303 >::value 304 >::type 305 > 306 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 307 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value)) 308 : _Hp(_VSTD::forward<_Tp>(__t)) {} 309 310 template <class _Tp, class _Alloc> 311 _LIBCPP_INLINE_VISIBILITY 312 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) 313 : _Hp(_VSTD::forward<_Tp>(__t)) {} 314 315 template <class _Tp, class _Alloc> 316 _LIBCPP_INLINE_VISIBILITY 317 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) 318 : _Hp(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) {} 319 320 template <class _Tp, class _Alloc> 321 _LIBCPP_INLINE_VISIBILITY 322 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) 323 : _Hp(_VSTD::forward<_Tp>(__t), __a) {} 324 325 __tuple_leaf(__tuple_leaf const &) = default; 326 __tuple_leaf(__tuple_leaf &&) = default; 327 328 template <class _Tp> 329 _LIBCPP_INLINE_VISIBILITY 330 __tuple_leaf& 331 operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value)) 332 { 333 _Hp::operator=(_VSTD::forward<_Tp>(__t)); 334 return *this; 335 } 336 337 _LIBCPP_INLINE_VISIBILITY 338 int 339 swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value) 340 { 341 _VSTD::swap(*this, __t); 342 return 0; 343 } 344 345 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return static_cast<_Hp&>(*this);} 346 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return static_cast<const _Hp&>(*this);} 347}; 348 349template <class ..._Tp> 350_LIBCPP_INLINE_VISIBILITY 351void __swallow(_Tp&&...) _NOEXCEPT {} 352 353template <class ..._Tp> 354struct __lazy_all : __all<_Tp::value...> {}; 355 356template <class _Tp> 357struct __all_default_constructible; 358 359template <class ..._Tp> 360struct __all_default_constructible<__tuple_types<_Tp...>> 361 : __all<is_default_constructible<_Tp>::value...> 362{ }; 363 364// __tuple_impl 365 366template<class _Indx, class ..._Tp> struct __tuple_impl; 367 368template<size_t ..._Indx, class ..._Tp> 369struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...> 370 : public __tuple_leaf<_Indx, _Tp>... 371{ 372 _LIBCPP_INLINE_VISIBILITY 373 _LIBCPP_CONSTEXPR __tuple_impl() 374 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {} 375 376 template <size_t ..._Uf, class ..._Tf, 377 size_t ..._Ul, class ..._Tl, class ..._Up> 378 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 379 explicit 380 __tuple_impl(__tuple_indices<_Uf...>, __tuple_types<_Tf...>, 381 __tuple_indices<_Ul...>, __tuple_types<_Tl...>, 382 _Up&&... __u) 383 _NOEXCEPT_((__all<is_nothrow_constructible<_Tf, _Up>::value...>::value && 384 __all<is_nothrow_default_constructible<_Tl>::value...>::value)) : 385 __tuple_leaf<_Uf, _Tf>(_VSTD::forward<_Up>(__u))..., 386 __tuple_leaf<_Ul, _Tl>()... 387 {} 388 389 template <class _Alloc, size_t ..._Uf, class ..._Tf, 390 size_t ..._Ul, class ..._Tl, class ..._Up> 391 _LIBCPP_INLINE_VISIBILITY 392 explicit 393 __tuple_impl(allocator_arg_t, const _Alloc& __a, 394 __tuple_indices<_Uf...>, __tuple_types<_Tf...>, 395 __tuple_indices<_Ul...>, __tuple_types<_Tl...>, 396 _Up&&... __u) : 397 __tuple_leaf<_Uf, _Tf>(__uses_alloc_ctor<_Tf, _Alloc, _Up>(), __a, 398 _VSTD::forward<_Up>(__u))..., 399 __tuple_leaf<_Ul, _Tl>(__uses_alloc_ctor<_Tl, _Alloc>(), __a)... 400 {} 401 402 template <class _Tuple, 403 class = typename enable_if 404 < 405 __tuple_constructible<_Tuple, tuple<_Tp...> >::value 406 >::type 407 > 408 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 409 __tuple_impl(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_constructible<_Tp, typename tuple_element<_Indx, 410 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value)) 411 : __tuple_leaf<_Indx, _Tp>(_VSTD::forward<typename tuple_element<_Indx, 412 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))... 413 {} 414 415 template <class _Alloc, class _Tuple, 416 class = typename enable_if 417 < 418 __tuple_constructible<_Tuple, tuple<_Tp...> >::value 419 >::type 420 > 421 _LIBCPP_INLINE_VISIBILITY 422 __tuple_impl(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 423 : __tuple_leaf<_Indx, _Tp>(__uses_alloc_ctor<_Tp, _Alloc, typename tuple_element<_Indx, 424 typename __make_tuple_types<_Tuple>::type>::type>(), __a, 425 _VSTD::forward<typename tuple_element<_Indx, 426 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))... 427 {} 428 429 template <class _Tuple> 430 _LIBCPP_INLINE_VISIBILITY 431 typename enable_if 432 < 433 __tuple_assignable<_Tuple, tuple<_Tp...> >::value, 434 __tuple_impl& 435 >::type 436 operator=(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_assignable<_Tp&, typename tuple_element<_Indx, 437 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value)) 438 { 439 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<typename tuple_element<_Indx, 440 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...); 441 return *this; 442 } 443 444 __tuple_impl(const __tuple_impl&) = default; 445 __tuple_impl(__tuple_impl&&) = default; 446 447 _LIBCPP_INLINE_VISIBILITY 448 __tuple_impl& 449 operator=(const __tuple_impl& __t) _NOEXCEPT_((__all<is_nothrow_copy_assignable<_Tp>::value...>::value)) 450 { 451 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(static_cast<const __tuple_leaf<_Indx, _Tp>&>(__t).get())...); 452 return *this; 453 } 454 455 _LIBCPP_INLINE_VISIBILITY 456 __tuple_impl& 457 operator=(__tuple_impl&& __t) _NOEXCEPT_((__all<is_nothrow_move_assignable<_Tp>::value...>::value)) 458 { 459 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<_Tp>(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t).get()))...); 460 return *this; 461 } 462 463 _LIBCPP_INLINE_VISIBILITY 464 void swap(__tuple_impl& __t) 465 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 466 { 467 __swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t))...); 468 } 469}; 470 471 472 473template <class ..._Tp> 474class _LIBCPP_TYPE_VIS_ONLY tuple 475{ 476 typedef __tuple_impl<typename __make_tuple_indices<sizeof...(_Tp)>::type, _Tp...> base; 477 478 base base_; 479 480 template <class ..._Args> 481 struct _PackExpandsToThisTuple : false_type {}; 482 483 template <class _Arg> 484 struct _PackExpandsToThisTuple<_Arg> 485 : is_same<typename __uncvref<_Arg>::type, tuple> {}; 486 487 template <bool _MaybeEnable, class _Dummy = void> 488 struct _CheckArgsConstructor : __check_tuple_constructor_fail {}; 489 490 template <class _Dummy> 491 struct _CheckArgsConstructor<true, _Dummy> 492 { 493 template <class ..._Args> 494 static constexpr bool __enable_default() { 495 return __all<is_default_constructible<_Args>::value...>::value; 496 } 497 498 template <class ..._Args> 499 static constexpr bool __enable_explicit() { 500 return 501 __tuple_constructible< 502 tuple<_Args...>, 503 typename __make_tuple_types<tuple, 504 sizeof...(_Args) < sizeof...(_Tp) ? 505 sizeof...(_Args) : 506 sizeof...(_Tp)>::type 507 >::value && 508 !__tuple_convertible< 509 tuple<_Args...>, 510 typename __make_tuple_types<tuple, 511 sizeof...(_Args) < sizeof...(_Tp) ? 512 sizeof...(_Args) : 513 sizeof...(_Tp)>::type 514 >::value && 515 __all_default_constructible< 516 typename __make_tuple_types<tuple, sizeof...(_Tp), 517 sizeof...(_Args) < sizeof...(_Tp) ? 518 sizeof...(_Args) : 519 sizeof...(_Tp)>::type 520 >::value; 521 } 522 523 template <class ..._Args> 524 static constexpr bool __enable_implicit() { 525 return 526 __tuple_convertible< 527 tuple<_Args...>, 528 typename __make_tuple_types<tuple, 529 sizeof...(_Args) < sizeof...(_Tp) ? 530 sizeof...(_Args) : 531 sizeof...(_Tp)>::type 532 >::value && 533 __all_default_constructible< 534 typename __make_tuple_types<tuple, sizeof...(_Tp), 535 sizeof...(_Args) < sizeof...(_Tp) ? 536 sizeof...(_Args) : 537 sizeof...(_Tp)>::type 538 >::value; 539 } 540 }; 541 542 template <bool _MaybeEnable, 543 bool = sizeof...(_Tp) == 1, 544 class _Dummy = void> 545 struct _CheckTupleLikeConstructor : __check_tuple_constructor_fail {}; 546 547 template <class _Dummy> 548 struct _CheckTupleLikeConstructor<true, false, _Dummy> 549 { 550 template <class _Tuple> 551 static constexpr bool __enable_implicit() { 552 return __tuple_convertible<_Tuple, tuple>::value; 553 } 554 555 template <class _Tuple> 556 static constexpr bool __enable_explicit() { 557 return __tuple_constructible<_Tuple, tuple>::value 558 && !__tuple_convertible<_Tuple, tuple>::value; 559 } 560 }; 561 562 template <class _Dummy> 563 struct _CheckTupleLikeConstructor<true, true, _Dummy> 564 { 565 // This trait is used to disable the tuple-like constructor when 566 // the UTypes... constructor should be selected instead. 567 // See LWG issue #2549. 568 template <class _Tuple> 569 using _PreferTupleLikeConstructor = __lazy_or< 570 // Don't attempt the two checks below if the tuple we are given 571 // has the same type as this tuple. 572 is_same<typename __uncvref<_Tuple>::type, tuple>, 573 __lazy_and< 574 __lazy_not<is_constructible<_Tp..., _Tuple>>, 575 __lazy_not<is_convertible<_Tuple, _Tp...>> 576 > 577 >; 578 579 template <class _Tuple> 580 static constexpr bool __enable_implicit() { 581 return __lazy_and< 582 __tuple_convertible<_Tuple, tuple>, 583 _PreferTupleLikeConstructor<_Tuple> 584 >::value; 585 } 586 587 template <class _Tuple> 588 static constexpr bool __enable_explicit() { 589 return __lazy_and< 590 __tuple_constructible<_Tuple, tuple>, 591 _PreferTupleLikeConstructor<_Tuple>, 592 __lazy_not<__tuple_convertible<_Tuple, tuple>> 593 >::value; 594 } 595 }; 596 597 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 598 typename tuple_element<_Jp, tuple<_Up...> >::type& get(tuple<_Up...>&) _NOEXCEPT; 599 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 600 const typename tuple_element<_Jp, tuple<_Up...> >::type& get(const tuple<_Up...>&) _NOEXCEPT; 601 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 602 typename tuple_element<_Jp, tuple<_Up...> >::type&& get(tuple<_Up...>&&) _NOEXCEPT; 603 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 604 const typename tuple_element<_Jp, tuple<_Up...> >::type&& get(const tuple<_Up...>&&) _NOEXCEPT; 605public: 606 607 template <bool _Dummy = true, class = typename enable_if< 608 _CheckArgsConstructor<_Dummy>::template __enable_default<_Tp...>() 609 >::type> 610 _LIBCPP_INLINE_VISIBILITY 611 _LIBCPP_CONSTEXPR tuple() 612 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {} 613 614 tuple(tuple const&) = default; 615 tuple(tuple&&) = default; 616 617 template <class _AllocArgT, class _Alloc, bool _Dummy = true, class = typename enable_if< 618 __lazy_and< 619 is_same<allocator_arg_t, _AllocArgT>, 620 __lazy_all<__dependent_type<is_default_constructible<_Tp>, _Dummy>...> 621 >::value 622 >::type> 623 _LIBCPP_INLINE_VISIBILITY 624 tuple(_AllocArgT, _Alloc const& __a) 625 : base_(allocator_arg_t(), __a, 626 __tuple_indices<>(), __tuple_types<>(), 627 typename __make_tuple_indices<sizeof...(_Tp), 0>::type(), 628 __tuple_types<_Tp...>()) {} 629 630 template <bool _Dummy = true, 631 typename enable_if 632 < 633 _CheckArgsConstructor< 634 _Dummy 635 >::template __enable_implicit<_Tp...>(), 636 bool 637 >::type = false 638 > 639 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 640 tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::value)) 641 : base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(), 642 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 643 typename __make_tuple_indices<0>::type(), 644 typename __make_tuple_types<tuple, 0>::type(), 645 __t... 646 ) {} 647 648 template <bool _Dummy = true, 649 typename enable_if 650 < 651 _CheckArgsConstructor< 652 _Dummy 653 >::template __enable_explicit<_Tp...>(), 654 bool 655 >::type = false 656 > 657 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 658 explicit tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::value)) 659 : base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(), 660 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 661 typename __make_tuple_indices<0>::type(), 662 typename __make_tuple_types<tuple, 0>::type(), 663 __t... 664 ) {} 665 666 template <class _Alloc, bool _Dummy = true, 667 typename enable_if 668 < 669 _CheckArgsConstructor< 670 _Dummy 671 >::template __enable_implicit<_Tp...>(), 672 bool 673 >::type = false 674 > 675 _LIBCPP_INLINE_VISIBILITY 676 tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t) 677 : base_(allocator_arg_t(), __a, 678 typename __make_tuple_indices<sizeof...(_Tp)>::type(), 679 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 680 typename __make_tuple_indices<0>::type(), 681 typename __make_tuple_types<tuple, 0>::type(), 682 __t... 683 ) {} 684 685 template <class _Alloc, bool _Dummy = true, 686 typename enable_if 687 < 688 _CheckArgsConstructor< 689 _Dummy 690 >::template __enable_explicit<_Tp...>(), 691 bool 692 >::type = false 693 > 694 _LIBCPP_INLINE_VISIBILITY 695 explicit 696 tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t) 697 : base_(allocator_arg_t(), __a, 698 typename __make_tuple_indices<sizeof...(_Tp)>::type(), 699 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 700 typename __make_tuple_indices<0>::type(), 701 typename __make_tuple_types<tuple, 0>::type(), 702 __t... 703 ) {} 704 705 template <class ..._Up, 706 typename enable_if 707 < 708 _CheckArgsConstructor< 709 sizeof...(_Up) <= sizeof...(_Tp) 710 && !_PackExpandsToThisTuple<_Up...>::value 711 >::template __enable_implicit<_Up...>(), 712 bool 713 >::type = false 714 > 715 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 716 tuple(_Up&&... __u) 717 _NOEXCEPT_(( 718 is_nothrow_constructible<base, 719 typename __make_tuple_indices<sizeof...(_Up)>::type, 720 typename __make_tuple_types<tuple, sizeof...(_Up)>::type, 721 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type, 722 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type, 723 _Up... 724 >::value 725 )) 726 : base_(typename __make_tuple_indices<sizeof...(_Up)>::type(), 727 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 728 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 729 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 730 _VSTD::forward<_Up>(__u)...) {} 731 732 template <class ..._Up, 733 typename enable_if 734 < 735 _CheckArgsConstructor< 736 sizeof...(_Up) <= sizeof...(_Tp) 737 && !_PackExpandsToThisTuple<_Up...>::value 738 >::template __enable_explicit<_Up...>(), 739 bool 740 >::type = false 741 > 742 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 743 explicit 744 tuple(_Up&&... __u) 745 _NOEXCEPT_(( 746 is_nothrow_constructible<base, 747 typename __make_tuple_indices<sizeof...(_Up)>::type, 748 typename __make_tuple_types<tuple, sizeof...(_Up)>::type, 749 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type, 750 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type, 751 _Up... 752 >::value 753 )) 754 : base_(typename __make_tuple_indices<sizeof...(_Up)>::type(), 755 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 756 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 757 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 758 _VSTD::forward<_Up>(__u)...) {} 759 760 template <class _Alloc, class ..._Up, 761 typename enable_if 762 < 763 _CheckArgsConstructor< 764 sizeof...(_Up) == sizeof...(_Tp) && 765 !_PackExpandsToThisTuple<_Up...>::value 766 >::template __enable_implicit<_Up...>(), 767 bool 768 >::type = false 769 > 770 _LIBCPP_INLINE_VISIBILITY 771 tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u) 772 : base_(allocator_arg_t(), __a, 773 typename __make_tuple_indices<sizeof...(_Up)>::type(), 774 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 775 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 776 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 777 _VSTD::forward<_Up>(__u)...) {} 778 779 template <class _Alloc, class ..._Up, 780 typename enable_if 781 < 782 _CheckArgsConstructor< 783 sizeof...(_Up) == sizeof...(_Tp) && 784 !_PackExpandsToThisTuple<_Up...>::value 785 >::template __enable_explicit<_Up...>(), 786 bool 787 >::type = false 788 > 789 _LIBCPP_INLINE_VISIBILITY 790 explicit 791 tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u) 792 : base_(allocator_arg_t(), __a, 793 typename __make_tuple_indices<sizeof...(_Up)>::type(), 794 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 795 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 796 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 797 _VSTD::forward<_Up>(__u)...) {} 798 799 template <class _Tuple, 800 typename enable_if 801 < 802 _CheckTupleLikeConstructor< 803 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 804 && !_PackExpandsToThisTuple<_Tuple>::value 805 >::template __enable_implicit<_Tuple>(), 806 bool 807 >::type = false 808 > 809 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 810 tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value)) 811 : base_(_VSTD::forward<_Tuple>(__t)) {} 812 813 template <class _Tuple, 814 typename enable_if 815 < 816 _CheckTupleLikeConstructor< 817 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 818 && !_PackExpandsToThisTuple<_Tuple>::value 819 >::template __enable_explicit<_Tuple>(), 820 bool 821 >::type = false 822 > 823 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 824 explicit 825 tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value)) 826 : base_(_VSTD::forward<_Tuple>(__t)) {} 827 828 template <class _Alloc, class _Tuple, 829 typename enable_if 830 < 831 _CheckTupleLikeConstructor< 832 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 833 >::template __enable_implicit<_Tuple>(), 834 bool 835 >::type = false 836 > 837 _LIBCPP_INLINE_VISIBILITY 838 tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 839 : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {} 840 841 template <class _Alloc, class _Tuple, 842 typename enable_if 843 < 844 _CheckTupleLikeConstructor< 845 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 846 >::template __enable_explicit<_Tuple>(), 847 bool 848 >::type = false 849 > 850 _LIBCPP_INLINE_VISIBILITY 851 explicit 852 tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 853 : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {} 854 855 using _CanCopyAssign = __all<is_copy_assignable<_Tp>::value...>; 856 using _CanMoveAssign = __all<is_move_assignable<_Tp>::value...>; 857 858 _LIBCPP_INLINE_VISIBILITY 859 tuple& operator=(typename conditional<_CanCopyAssign::value, tuple, __nat>::type const& __t) 860 _NOEXCEPT_((__all<is_nothrow_copy_assignable<_Tp>::value...>::value)) 861 { 862 base_.operator=(__t.base_); 863 return *this; 864 } 865 866 _LIBCPP_INLINE_VISIBILITY 867 tuple& operator=(typename conditional<_CanMoveAssign::value, tuple, __nat>::type&& __t) 868 _NOEXCEPT_((__all<is_nothrow_move_assignable<_Tp>::value...>::value)) 869 { 870 base_.operator=(static_cast<base&&>(__t.base_)); 871 return *this; 872 } 873 874 template <class _Tuple, 875 class = typename enable_if 876 < 877 __tuple_assignable<_Tuple, tuple>::value 878 >::type 879 > 880 _LIBCPP_INLINE_VISIBILITY 881 tuple& 882 operator=(_Tuple&& __t) _NOEXCEPT_((is_nothrow_assignable<base&, _Tuple>::value)) 883 { 884 base_.operator=(_VSTD::forward<_Tuple>(__t)); 885 return *this; 886 } 887 888 _LIBCPP_INLINE_VISIBILITY 889 void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 890 {base_.swap(__t.base_);} 891}; 892 893template <> 894class _LIBCPP_TYPE_VIS_ONLY tuple<> 895{ 896public: 897 _LIBCPP_INLINE_VISIBILITY 898 _LIBCPP_CONSTEXPR tuple() _NOEXCEPT {} 899 template <class _Alloc> 900 _LIBCPP_INLINE_VISIBILITY 901 tuple(allocator_arg_t, const _Alloc&) _NOEXCEPT {} 902 template <class _Alloc> 903 _LIBCPP_INLINE_VISIBILITY 904 tuple(allocator_arg_t, const _Alloc&, const tuple&) _NOEXCEPT {} 905 template <class _Up> 906 _LIBCPP_INLINE_VISIBILITY 907 tuple(array<_Up, 0>) _NOEXCEPT {} 908 template <class _Alloc, class _Up> 909 _LIBCPP_INLINE_VISIBILITY 910 tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {} 911 _LIBCPP_INLINE_VISIBILITY 912 void swap(tuple&) _NOEXCEPT {} 913}; 914 915template <class ..._Tp> 916inline _LIBCPP_INLINE_VISIBILITY 917typename enable_if 918< 919 __all<__is_swappable<_Tp>::value...>::value, 920 void 921>::type 922swap(tuple<_Tp...>& __t, tuple<_Tp...>& __u) 923 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 924 {__t.swap(__u);} 925 926// get 927 928template <size_t _Ip, class ..._Tp> 929inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 930typename tuple_element<_Ip, tuple<_Tp...> >::type& 931get(tuple<_Tp...>& __t) _NOEXCEPT 932{ 933 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 934 return static_cast<__tuple_leaf<_Ip, type>&>(__t.base_).get(); 935} 936 937template <size_t _Ip, class ..._Tp> 938inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 939const typename tuple_element<_Ip, tuple<_Tp...> >::type& 940get(const tuple<_Tp...>& __t) _NOEXCEPT 941{ 942 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 943 return static_cast<const __tuple_leaf<_Ip, type>&>(__t.base_).get(); 944} 945 946template <size_t _Ip, class ..._Tp> 947inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 948typename tuple_element<_Ip, tuple<_Tp...> >::type&& 949get(tuple<_Tp...>&& __t) _NOEXCEPT 950{ 951 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 952 return static_cast<type&&>( 953 static_cast<__tuple_leaf<_Ip, type>&&>(__t.base_).get()); 954} 955 956template <size_t _Ip, class ..._Tp> 957inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 958const typename tuple_element<_Ip, tuple<_Tp...> >::type&& 959get(const tuple<_Tp...>&& __t) _NOEXCEPT 960{ 961 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 962 return static_cast<const type&&>( 963 static_cast<const __tuple_leaf<_Ip, type>&&>(__t.base_).get()); 964} 965 966#if _LIBCPP_STD_VER > 11 967 968namespace __find_detail { 969 970static constexpr size_t __not_found = -1; 971static constexpr size_t __ambiguous = __not_found - 1; 972 973inline _LIBCPP_INLINE_VISIBILITY 974constexpr size_t __find_idx_return(size_t __curr_i, size_t __res, bool __matches) { 975 return !__matches ? __res : 976 (__res == __not_found ? __curr_i : __ambiguous); 977} 978 979template <size_t _Nx> 980inline _LIBCPP_INLINE_VISIBILITY 981constexpr size_t __find_idx(size_t __i, const bool (&__matches)[_Nx]) { 982 return __i == _Nx ? __not_found : 983 __find_idx_return(__i, __find_idx(__i + 1, __matches), __matches[__i]); 984} 985 986template <class _T1, class ..._Args> 987struct __find_exactly_one_checked { 988 static constexpr bool __matches[] = {is_same<_T1, _Args>::value...}; 989 static constexpr size_t value = __find_detail::__find_idx(0, __matches); 990 static_assert (value != __not_found, "type not found in type list" ); 991 static_assert(value != __ambiguous,"type occurs more than once in type list"); 992}; 993 994template <class _T1> 995struct __find_exactly_one_checked<_T1> { 996 static_assert(!is_same<_T1, _T1>::value, "type not in empty type list"); 997}; 998 999} // namespace __find_detail; 1000 1001template <typename _T1, typename... _Args> 1002struct __find_exactly_one_t 1003 : public __find_detail::__find_exactly_one_checked<_T1, _Args...> { 1004}; 1005 1006template <class _T1, class... _Args> 1007inline _LIBCPP_INLINE_VISIBILITY 1008constexpr _T1& get(tuple<_Args...>& __tup) noexcept 1009{ 1010 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup); 1011} 1012 1013template <class _T1, class... _Args> 1014inline _LIBCPP_INLINE_VISIBILITY 1015constexpr _T1 const& get(tuple<_Args...> const& __tup) noexcept 1016{ 1017 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup); 1018} 1019 1020template <class _T1, class... _Args> 1021inline _LIBCPP_INLINE_VISIBILITY 1022constexpr _T1&& get(tuple<_Args...>&& __tup) noexcept 1023{ 1024 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup)); 1025} 1026 1027template <class _T1, class... _Args> 1028inline _LIBCPP_INLINE_VISIBILITY 1029constexpr _T1 const&& get(tuple<_Args...> const&& __tup) noexcept 1030{ 1031 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup)); 1032} 1033 1034#endif 1035 1036// tie 1037 1038template <class ..._Tp> 1039inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1040tuple<_Tp&...> 1041tie(_Tp&... __t) _NOEXCEPT 1042{ 1043 return tuple<_Tp&...>(__t...); 1044} 1045 1046template <class _Up> 1047struct __ignore_t 1048{ 1049 template <class _Tp> 1050 _LIBCPP_INLINE_VISIBILITY 1051 const __ignore_t& operator=(_Tp&&) const {return *this;} 1052}; 1053 1054namespace { const __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); } 1055 1056template <class _Tp> 1057struct __make_tuple_return_impl 1058{ 1059 typedef _Tp type; 1060}; 1061 1062template <class _Tp> 1063struct __make_tuple_return_impl<reference_wrapper<_Tp> > 1064{ 1065 typedef _Tp& type; 1066}; 1067 1068template <class _Tp> 1069struct __make_tuple_return 1070{ 1071 typedef typename __make_tuple_return_impl<typename decay<_Tp>::type>::type type; 1072}; 1073 1074template <class... _Tp> 1075inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1076tuple<typename __make_tuple_return<_Tp>::type...> 1077make_tuple(_Tp&&... __t) 1078{ 1079 return tuple<typename __make_tuple_return<_Tp>::type...>(_VSTD::forward<_Tp>(__t)...); 1080} 1081 1082template <class... _Tp> 1083inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1084tuple<_Tp&&...> 1085forward_as_tuple(_Tp&&... __t) _NOEXCEPT 1086{ 1087 return tuple<_Tp&&...>(_VSTD::forward<_Tp>(__t)...); 1088} 1089 1090template <size_t _Ip> 1091struct __tuple_equal 1092{ 1093 template <class _Tp, class _Up> 1094 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1095 bool operator()(const _Tp& __x, const _Up& __y) 1096 { 1097 return __tuple_equal<_Ip - 1>()(__x, __y) && _VSTD::get<_Ip-1>(__x) == _VSTD::get<_Ip-1>(__y); 1098 } 1099}; 1100 1101template <> 1102struct __tuple_equal<0> 1103{ 1104 template <class _Tp, class _Up> 1105 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1106 bool operator()(const _Tp&, const _Up&) 1107 { 1108 return true; 1109 } 1110}; 1111 1112template <class ..._Tp, class ..._Up> 1113inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1114bool 1115operator==(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1116{ 1117 return __tuple_equal<sizeof...(_Tp)>()(__x, __y); 1118} 1119 1120template <class ..._Tp, class ..._Up> 1121inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1122bool 1123operator!=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1124{ 1125 return !(__x == __y); 1126} 1127 1128template <size_t _Ip> 1129struct __tuple_less 1130{ 1131 template <class _Tp, class _Up> 1132 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1133 bool operator()(const _Tp& __x, const _Up& __y) 1134 { 1135 const size_t __idx = tuple_size<_Tp>::value - _Ip; 1136 if (_VSTD::get<__idx>(__x) < _VSTD::get<__idx>(__y)) 1137 return true; 1138 if (_VSTD::get<__idx>(__y) < _VSTD::get<__idx>(__x)) 1139 return false; 1140 return __tuple_less<_Ip-1>()(__x, __y); 1141 } 1142}; 1143 1144template <> 1145struct __tuple_less<0> 1146{ 1147 template <class _Tp, class _Up> 1148 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1149 bool operator()(const _Tp&, const _Up&) 1150 { 1151 return false; 1152 } 1153}; 1154 1155template <class ..._Tp, class ..._Up> 1156inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1157bool 1158operator<(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1159{ 1160 return __tuple_less<sizeof...(_Tp)>()(__x, __y); 1161} 1162 1163template <class ..._Tp, class ..._Up> 1164inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1165bool 1166operator>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1167{ 1168 return __y < __x; 1169} 1170 1171template <class ..._Tp, class ..._Up> 1172inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1173bool 1174operator>=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1175{ 1176 return !(__x < __y); 1177} 1178 1179template <class ..._Tp, class ..._Up> 1180inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1181bool 1182operator<=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1183{ 1184 return !(__y < __x); 1185} 1186 1187// tuple_cat 1188 1189template <class _Tp, class _Up> struct __tuple_cat_type; 1190 1191template <class ..._Ttypes, class ..._Utypes> 1192struct __tuple_cat_type<tuple<_Ttypes...>, __tuple_types<_Utypes...> > 1193{ 1194 typedef tuple<_Ttypes..., _Utypes...> type; 1195}; 1196 1197template <class _ResultTuple, bool _Is_Tuple0TupleLike, class ..._Tuples> 1198struct __tuple_cat_return_1 1199{ 1200}; 1201 1202template <class ..._Types, class _Tuple0> 1203struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0> 1204{ 1205 typedef typename __tuple_cat_type<tuple<_Types...>, 1206 typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type>::type 1207 type; 1208}; 1209 1210template <class ..._Types, class _Tuple0, class _Tuple1, class ..._Tuples> 1211struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0, _Tuple1, _Tuples...> 1212 : public __tuple_cat_return_1< 1213 typename __tuple_cat_type< 1214 tuple<_Types...>, 1215 typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type 1216 >::type, 1217 __tuple_like<typename remove_reference<_Tuple1>::type>::value, 1218 _Tuple1, _Tuples...> 1219{ 1220}; 1221 1222template <class ..._Tuples> struct __tuple_cat_return; 1223 1224template <class _Tuple0, class ..._Tuples> 1225struct __tuple_cat_return<_Tuple0, _Tuples...> 1226 : public __tuple_cat_return_1<tuple<>, 1227 __tuple_like<typename remove_reference<_Tuple0>::type>::value, _Tuple0, 1228 _Tuples...> 1229{ 1230}; 1231 1232template <> 1233struct __tuple_cat_return<> 1234{ 1235 typedef tuple<> type; 1236}; 1237 1238inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1239tuple<> 1240tuple_cat() 1241{ 1242 return tuple<>(); 1243} 1244 1245template <class _Rp, class _Indices, class _Tuple0, class ..._Tuples> 1246struct __tuple_cat_return_ref_imp; 1247 1248template <class ..._Types, size_t ..._I0, class _Tuple0> 1249struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, _Tuple0> 1250{ 1251 typedef typename remove_reference<_Tuple0>::type _T0; 1252 typedef tuple<_Types..., typename __apply_cv<_Tuple0, 1253 typename tuple_element<_I0, _T0>::type>::type&&...> type; 1254}; 1255 1256template <class ..._Types, size_t ..._I0, class _Tuple0, class _Tuple1, class ..._Tuples> 1257struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, 1258 _Tuple0, _Tuple1, _Tuples...> 1259 : public __tuple_cat_return_ref_imp< 1260 tuple<_Types..., typename __apply_cv<_Tuple0, 1261 typename tuple_element<_I0, 1262 typename remove_reference<_Tuple0>::type>::type>::type&&...>, 1263 typename __make_tuple_indices<tuple_size<typename 1264 remove_reference<_Tuple1>::type>::value>::type, 1265 _Tuple1, _Tuples...> 1266{ 1267}; 1268 1269template <class _Tuple0, class ..._Tuples> 1270struct __tuple_cat_return_ref 1271 : public __tuple_cat_return_ref_imp<tuple<>, 1272 typename __make_tuple_indices< 1273 tuple_size<typename remove_reference<_Tuple0>::type>::value 1274 >::type, _Tuple0, _Tuples...> 1275{ 1276}; 1277 1278template <class _Types, class _I0, class _J0> 1279struct __tuple_cat; 1280 1281template <class ..._Types, size_t ..._I0, size_t ..._J0> 1282struct __tuple_cat<tuple<_Types...>, __tuple_indices<_I0...>, __tuple_indices<_J0...> > 1283{ 1284 template <class _Tuple0> 1285 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1286 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&>::type 1287 operator()(tuple<_Types...> __t, _Tuple0&& __t0) 1288 { 1289 return forward_as_tuple(_VSTD::forward<_Types>(_VSTD::get<_I0>(__t))..., 1290 _VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))...); 1291 } 1292 1293 template <class _Tuple0, class _Tuple1, class ..._Tuples> 1294 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1295 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&, _Tuple1&&, _Tuples&&...>::type 1296 operator()(tuple<_Types...> __t, _Tuple0&& __t0, _Tuple1&& __t1, _Tuples&& ...__tpls) 1297 { 1298 typedef typename remove_reference<_Tuple0>::type _T0; 1299 typedef typename remove_reference<_Tuple1>::type _T1; 1300 return __tuple_cat< 1301 tuple<_Types..., typename __apply_cv<_Tuple0, typename tuple_element<_J0, _T0>::type>::type&&...>, 1302 typename __make_tuple_indices<sizeof ...(_Types) + tuple_size<_T0>::value>::type, 1303 typename __make_tuple_indices<tuple_size<_T1>::value>::type>() 1304 (forward_as_tuple( 1305 _VSTD::forward<_Types>(_VSTD::get<_I0>(__t))..., 1306 _VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))... 1307 ), 1308 _VSTD::forward<_Tuple1>(__t1), 1309 _VSTD::forward<_Tuples>(__tpls)...); 1310 } 1311}; 1312 1313template <class _Tuple0, class... _Tuples> 1314inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1315typename __tuple_cat_return<_Tuple0, _Tuples...>::type 1316tuple_cat(_Tuple0&& __t0, _Tuples&&... __tpls) 1317{ 1318 typedef typename remove_reference<_Tuple0>::type _T0; 1319 return __tuple_cat<tuple<>, __tuple_indices<>, 1320 typename __make_tuple_indices<tuple_size<_T0>::value>::type>() 1321 (tuple<>(), _VSTD::forward<_Tuple0>(__t0), 1322 _VSTD::forward<_Tuples>(__tpls)...); 1323} 1324 1325template <class ..._Tp, class _Alloc> 1326struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<tuple<_Tp...>, _Alloc> 1327 : true_type {}; 1328 1329#endif // _LIBCPP_HAS_NO_VARIADICS 1330 1331#ifndef _LIBCPP_CXX03_LANG 1332template <class _T1, class _T2> 1333template <class... _Args1, class... _Args2, size_t ..._I1, size_t ..._I2> 1334inline _LIBCPP_INLINE_VISIBILITY 1335pair<_T1, _T2>::pair(piecewise_construct_t, 1336 tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args, 1337 __tuple_indices<_I1...>, __tuple_indices<_I2...>) 1338 : first(_VSTD::forward<_Args1>(_VSTD::get<_I1>( __first_args))...), 1339 second(_VSTD::forward<_Args2>(_VSTD::get<_I2>(__second_args))...) 1340{ 1341} 1342#endif // _LIBCPP_CXX03_LANG 1343 1344#if _LIBCPP_STD_VER > 14 1345template <class _Tp> 1346constexpr size_t tuple_size_v = tuple_size<_Tp>::value; 1347 1348#define _LIBCPP_NOEXCEPT_RETURN(...) noexcept(noexcept(__VA_ARGS__)) { return __VA_ARGS__; } 1349 1350template <class _Fn, class _Tuple, size_t ..._Id> 1351inline _LIBCPP_INLINE_VISIBILITY 1352constexpr decltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t, 1353 __tuple_indices<_Id...>) 1354_LIBCPP_NOEXCEPT_RETURN( 1355 _VSTD::__invoke_constexpr( 1356 _VSTD::forward<_Fn>(__f), 1357 _VSTD::get<_Id>(_VSTD::forward<_Tuple>(__t))...) 1358) 1359 1360template <class _Fn, class _Tuple> 1361inline _LIBCPP_INLINE_VISIBILITY 1362constexpr decltype(auto) apply(_Fn && __f, _Tuple && __t) 1363_LIBCPP_NOEXCEPT_RETURN( 1364 _VSTD::__apply_tuple_impl( 1365 _VSTD::forward<_Fn>(__f), _VSTD::forward<_Tuple>(__t), 1366 typename __make_tuple_indices<tuple_size_v<decay_t<_Tuple>>>::type{}) 1367) 1368 1369template <class _Tp, class _Tuple, size_t... _Idx> 1370inline _LIBCPP_INLINE_VISIBILITY 1371constexpr _Tp __make_from_tuple_impl(_Tuple&& __t, __tuple_indices<_Idx...>) 1372_LIBCPP_NOEXCEPT_RETURN( 1373 _Tp(_VSTD::get<_Idx>(_VSTD::forward<_Tuple>(__t))...) 1374) 1375 1376template <class _Tp, class _Tuple> 1377inline _LIBCPP_INLINE_VISIBILITY 1378constexpr _Tp make_from_tuple(_Tuple&& __t) 1379_LIBCPP_NOEXCEPT_RETURN( 1380 _VSTD::__make_from_tuple_impl<_Tp>(_VSTD::forward<_Tuple>(__t), 1381 typename __make_tuple_indices<tuple_size_v<decay_t<_Tuple>>>::type{}) 1382) 1383 1384#undef _LIBCPP_NOEXCEPT_RETURN 1385 1386#endif // _LIBCPP_STD_VER > 14 1387 1388_LIBCPP_END_NAMESPACE_STD 1389 1390#endif // _LIBCPP_TUPLE 1391