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// tuple_size 154 155template <class ..._Tp> 156class _LIBCPP_TYPE_VIS_ONLY tuple_size<tuple<_Tp...> > 157 : public integral_constant<size_t, sizeof...(_Tp)> 158{ 159}; 160 161// tuple_element 162 163template <size_t _Ip, class ..._Tp> 164class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, tuple<_Tp...> > 165{ 166public: 167 typedef typename tuple_element<_Ip, __tuple_types<_Tp...> >::type type; 168}; 169 170#if _LIBCPP_STD_VER > 11 171template <size_t _Ip, class ..._Tp> 172using tuple_element_t = typename tuple_element <_Ip, _Tp...>::type; 173#endif 174 175// __tuple_leaf 176 177template <size_t _Ip, class _Hp, 178 bool=is_empty<_Hp>::value && !__libcpp_is_final<_Hp>::value 179 > 180class __tuple_leaf; 181 182template <size_t _Ip, class _Hp, bool _Ep> 183inline _LIBCPP_INLINE_VISIBILITY 184void swap(__tuple_leaf<_Ip, _Hp, _Ep>& __x, __tuple_leaf<_Ip, _Hp, _Ep>& __y) 185 _NOEXCEPT_(__is_nothrow_swappable<_Hp>::value) 186{ 187 swap(__x.get(), __y.get()); 188} 189 190template <size_t _Ip, class _Hp, bool> 191class __tuple_leaf 192{ 193 _Hp value; 194 195 __tuple_leaf& operator=(const __tuple_leaf&); 196public: 197 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() 198 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) : 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, 0>, const _Alloc&) 205 : value() 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, 1>, const _Alloc& __a) 212 : value(allocator_arg_t(), __a) 213 {static_assert(!is_reference<_Hp>::value, 214 "Attempted to default construct a reference element in a tuple");} 215 216 template <class _Alloc> 217 _LIBCPP_INLINE_VISIBILITY 218 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) 219 : value(__a) 220 {static_assert(!is_reference<_Hp>::value, 221 "Attempted to default construct a reference element in a tuple");} 222 223 template <class _Tp, 224 class = typename enable_if< 225 __lazy_and< 226 __lazy_not<is_same<typename decay<_Tp>::type, __tuple_leaf>> 227 , is_constructible<_Hp, _Tp> 228 >::value 229 >::type 230 > 231 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 232 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value)) 233 : value(_VSTD::forward<_Tp>(__t)) 234 {static_assert(!is_reference<_Hp>::value || 235 (is_lvalue_reference<_Hp>::value && 236 (is_lvalue_reference<_Tp>::value || 237 is_same<typename remove_reference<_Tp>::type, 238 reference_wrapper< 239 typename remove_reference<_Hp>::type 240 > 241 >::value)) || 242 (is_rvalue_reference<_Hp>::value && 243 !is_lvalue_reference<_Tp>::value), 244 "Attempted to construct a reference element in a tuple with an rvalue");} 245 246 template <class _Tp, class _Alloc> 247 _LIBCPP_INLINE_VISIBILITY 248 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) 249 : value(_VSTD::forward<_Tp>(__t)) 250 {static_assert(!is_lvalue_reference<_Hp>::value || 251 (is_lvalue_reference<_Hp>::value && 252 (is_lvalue_reference<_Tp>::value || 253 is_same<typename remove_reference<_Tp>::type, 254 reference_wrapper< 255 typename remove_reference<_Hp>::type 256 > 257 >::value)), 258 "Attempted to construct a reference element in a tuple with an rvalue");} 259 260 template <class _Tp, class _Alloc> 261 _LIBCPP_INLINE_VISIBILITY 262 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) 263 : value(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) 264 {static_assert(!is_lvalue_reference<_Hp>::value || 265 (is_lvalue_reference<_Hp>::value && 266 (is_lvalue_reference<_Tp>::value || 267 is_same<typename remove_reference<_Tp>::type, 268 reference_wrapper< 269 typename remove_reference<_Hp>::type 270 > 271 >::value)), 272 "Attempted to construct a reference element in a tuple with an rvalue");} 273 274 template <class _Tp, class _Alloc> 275 _LIBCPP_INLINE_VISIBILITY 276 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) 277 : value(_VSTD::forward<_Tp>(__t), __a) 278 {static_assert(!is_lvalue_reference<_Hp>::value || 279 (is_lvalue_reference<_Hp>::value && 280 (is_lvalue_reference<_Tp>::value || 281 is_same<typename remove_reference<_Tp>::type, 282 reference_wrapper< 283 typename remove_reference<_Hp>::type 284 > 285 >::value)), 286 "Attempted to construct a reference element in a tuple with an rvalue");} 287 288 __tuple_leaf(const __tuple_leaf& __t) = default; 289 __tuple_leaf(__tuple_leaf&& __t) = default; 290 291 template <class _Tp> 292 _LIBCPP_INLINE_VISIBILITY 293 __tuple_leaf& 294 operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value)) 295 { 296 value = _VSTD::forward<_Tp>(__t); 297 return *this; 298 } 299 300 _LIBCPP_INLINE_VISIBILITY 301 int swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value) 302 { 303 _VSTD::swap(*this, __t); 304 return 0; 305 } 306 307 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return value;} 308 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return value;} 309}; 310 311template <size_t _Ip, class _Hp> 312class __tuple_leaf<_Ip, _Hp, true> 313 : private _Hp 314{ 315 316 __tuple_leaf& operator=(const __tuple_leaf&); 317public: 318 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf() 319 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {} 320 321 template <class _Alloc> 322 _LIBCPP_INLINE_VISIBILITY 323 __tuple_leaf(integral_constant<int, 0>, const _Alloc&) {} 324 325 template <class _Alloc> 326 _LIBCPP_INLINE_VISIBILITY 327 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a) 328 : _Hp(allocator_arg_t(), __a) {} 329 330 template <class _Alloc> 331 _LIBCPP_INLINE_VISIBILITY 332 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) 333 : _Hp(__a) {} 334 335 template <class _Tp, 336 class = typename enable_if< 337 __lazy_and< 338 __lazy_not<is_same<typename decay<_Tp>::type, __tuple_leaf>> 339 , is_constructible<_Hp, _Tp> 340 >::value 341 >::type 342 > 343 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 344 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value)) 345 : _Hp(_VSTD::forward<_Tp>(__t)) {} 346 347 template <class _Tp, class _Alloc> 348 _LIBCPP_INLINE_VISIBILITY 349 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) 350 : _Hp(_VSTD::forward<_Tp>(__t)) {} 351 352 template <class _Tp, class _Alloc> 353 _LIBCPP_INLINE_VISIBILITY 354 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) 355 : _Hp(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) {} 356 357 template <class _Tp, class _Alloc> 358 _LIBCPP_INLINE_VISIBILITY 359 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) 360 : _Hp(_VSTD::forward<_Tp>(__t), __a) {} 361 362 __tuple_leaf(__tuple_leaf const &) = default; 363 __tuple_leaf(__tuple_leaf &&) = default; 364 365 template <class _Tp> 366 _LIBCPP_INLINE_VISIBILITY 367 __tuple_leaf& 368 operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value)) 369 { 370 _Hp::operator=(_VSTD::forward<_Tp>(__t)); 371 return *this; 372 } 373 374 _LIBCPP_INLINE_VISIBILITY 375 int 376 swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value) 377 { 378 _VSTD::swap(*this, __t); 379 return 0; 380 } 381 382 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return static_cast<_Hp&>(*this);} 383 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return static_cast<const _Hp&>(*this);} 384}; 385 386template <class ..._Tp> 387_LIBCPP_INLINE_VISIBILITY 388void __swallow(_Tp&&...) _NOEXCEPT {} 389 390template <class ..._Tp> 391struct __lazy_all : __all<_Tp::value...> {}; 392 393template <class _Tp> 394struct __all_default_constructible; 395 396template <class ..._Tp> 397struct __all_default_constructible<__tuple_types<_Tp...>> 398 : __all<is_default_constructible<_Tp>::value...> 399{ }; 400 401// __tuple_impl 402 403template<class _Indx, class ..._Tp> struct __tuple_impl; 404 405template<size_t ..._Indx, class ..._Tp> 406struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...> 407 : public __tuple_leaf<_Indx, _Tp>... 408{ 409 _LIBCPP_INLINE_VISIBILITY 410 _LIBCPP_CONSTEXPR __tuple_impl() 411 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {} 412 413 template <size_t ..._Uf, class ..._Tf, 414 size_t ..._Ul, class ..._Tl, class ..._Up> 415 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 416 explicit 417 __tuple_impl(__tuple_indices<_Uf...>, __tuple_types<_Tf...>, 418 __tuple_indices<_Ul...>, __tuple_types<_Tl...>, 419 _Up&&... __u) 420 _NOEXCEPT_((__all<is_nothrow_constructible<_Tf, _Up>::value...>::value && 421 __all<is_nothrow_default_constructible<_Tl>::value...>::value)) : 422 __tuple_leaf<_Uf, _Tf>(_VSTD::forward<_Up>(__u))..., 423 __tuple_leaf<_Ul, _Tl>()... 424 {} 425 426 template <class _Alloc, size_t ..._Uf, class ..._Tf, 427 size_t ..._Ul, class ..._Tl, class ..._Up> 428 _LIBCPP_INLINE_VISIBILITY 429 explicit 430 __tuple_impl(allocator_arg_t, const _Alloc& __a, 431 __tuple_indices<_Uf...>, __tuple_types<_Tf...>, 432 __tuple_indices<_Ul...>, __tuple_types<_Tl...>, 433 _Up&&... __u) : 434 __tuple_leaf<_Uf, _Tf>(__uses_alloc_ctor<_Tf, _Alloc, _Up>(), __a, 435 _VSTD::forward<_Up>(__u))..., 436 __tuple_leaf<_Ul, _Tl>(__uses_alloc_ctor<_Tl, _Alloc>(), __a)... 437 {} 438 439 template <class _Tuple, 440 class = typename enable_if 441 < 442 __tuple_constructible<_Tuple, tuple<_Tp...> >::value 443 >::type 444 > 445 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 446 __tuple_impl(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_constructible<_Tp, typename tuple_element<_Indx, 447 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value)) 448 : __tuple_leaf<_Indx, _Tp>(_VSTD::forward<typename tuple_element<_Indx, 449 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))... 450 {} 451 452 template <class _Alloc, class _Tuple, 453 class = typename enable_if 454 < 455 __tuple_constructible<_Tuple, tuple<_Tp...> >::value 456 >::type 457 > 458 _LIBCPP_INLINE_VISIBILITY 459 __tuple_impl(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 460 : __tuple_leaf<_Indx, _Tp>(__uses_alloc_ctor<_Tp, _Alloc, typename tuple_element<_Indx, 461 typename __make_tuple_types<_Tuple>::type>::type>(), __a, 462 _VSTD::forward<typename tuple_element<_Indx, 463 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))... 464 {} 465 466 template <class _Tuple> 467 _LIBCPP_INLINE_VISIBILITY 468 typename enable_if 469 < 470 __tuple_assignable<_Tuple, tuple<_Tp...> >::value, 471 __tuple_impl& 472 >::type 473 operator=(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_assignable<_Tp&, typename tuple_element<_Indx, 474 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value)) 475 { 476 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<typename tuple_element<_Indx, 477 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...); 478 return *this; 479 } 480 481 __tuple_impl(const __tuple_impl&) = default; 482 __tuple_impl(__tuple_impl&&) = default; 483 484 _LIBCPP_INLINE_VISIBILITY 485 __tuple_impl& 486 operator=(const __tuple_impl& __t) _NOEXCEPT_((__all<is_nothrow_copy_assignable<_Tp>::value...>::value)) 487 { 488 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(static_cast<const __tuple_leaf<_Indx, _Tp>&>(__t).get())...); 489 return *this; 490 } 491 492 _LIBCPP_INLINE_VISIBILITY 493 __tuple_impl& 494 operator=(__tuple_impl&& __t) _NOEXCEPT_((__all<is_nothrow_move_assignable<_Tp>::value...>::value)) 495 { 496 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<_Tp>(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t).get()))...); 497 return *this; 498 } 499 500 _LIBCPP_INLINE_VISIBILITY 501 void swap(__tuple_impl& __t) 502 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 503 { 504 __swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t))...); 505 } 506}; 507 508template <bool _IsTuple, class _SizeTrait, size_t _Expected> 509struct __tuple_like_with_size_imp : false_type {}; 510 511template <class _SizeTrait, size_t _Expected> 512struct __tuple_like_with_size_imp<true, _SizeTrait, _Expected> 513 : integral_constant<bool, _SizeTrait::value == _Expected> {}; 514 515template <class _Tuple, size_t _ExpectedSize, 516 class _RawTuple = typename __uncvref<_Tuple>::type> 517using __tuple_like_with_size = __tuple_like_with_size_imp< 518 __tuple_like<_RawTuple>::value, 519 tuple_size<_RawTuple>, _ExpectedSize 520 >; 521 522 523struct _LIBCPP_TYPE_VIS __check_tuple_constructor_fail { 524 template <class ...> 525 static constexpr bool __enable_explicit() { return false; } 526 template <class ...> 527 static constexpr bool __enable_implicit() { return false; } 528}; 529 530template <class ..._Tp> 531class _LIBCPP_TYPE_VIS_ONLY tuple 532{ 533 typedef __tuple_impl<typename __make_tuple_indices<sizeof...(_Tp)>::type, _Tp...> base; 534 535 base base_; 536 537 template <class ..._Args> 538 struct _PackExpandsToThisTuple : false_type {}; 539 540 template <class _Arg> 541 struct _PackExpandsToThisTuple<_Arg> 542 : is_same<typename __uncvref<_Arg>::type, tuple> {}; 543 544 template <bool _MaybeEnable, class _Dummy = void> 545 struct _CheckArgsConstructor : __check_tuple_constructor_fail {}; 546 547 template <class _Dummy> 548 struct _CheckArgsConstructor<true, _Dummy> 549 { 550 template <class ..._Args> 551 static constexpr bool __enable_explicit() { 552 return 553 __tuple_constructible< 554 tuple<_Args...>, 555 typename __make_tuple_types<tuple, 556 sizeof...(_Args) < sizeof...(_Tp) ? 557 sizeof...(_Args) : 558 sizeof...(_Tp)>::type 559 >::value && 560 !__tuple_convertible< 561 tuple<_Args...>, 562 typename __make_tuple_types<tuple, 563 sizeof...(_Args) < sizeof...(_Tp) ? 564 sizeof...(_Args) : 565 sizeof...(_Tp)>::type 566 >::value && 567 __all_default_constructible< 568 typename __make_tuple_types<tuple, sizeof...(_Tp), 569 sizeof...(_Args) < sizeof...(_Tp) ? 570 sizeof...(_Args) : 571 sizeof...(_Tp)>::type 572 >::value; 573 } 574 575 template <class ..._Args> 576 static constexpr bool __enable_implicit() { 577 return 578 __tuple_convertible< 579 tuple<_Args...>, 580 typename __make_tuple_types<tuple, 581 sizeof...(_Args) < sizeof...(_Tp) ? 582 sizeof...(_Args) : 583 sizeof...(_Tp)>::type 584 >::value && 585 __all_default_constructible< 586 typename __make_tuple_types<tuple, sizeof...(_Tp), 587 sizeof...(_Args) < sizeof...(_Tp) ? 588 sizeof...(_Args) : 589 sizeof...(_Tp)>::type 590 >::value; 591 } 592 }; 593 594 template <bool _MaybeEnable, 595 bool = sizeof...(_Tp) == 1, 596 class _Dummy = void> 597 struct _CheckTupleLikeConstructor : __check_tuple_constructor_fail {}; 598 599 template <class _Dummy> 600 struct _CheckTupleLikeConstructor<true, false, _Dummy> 601 { 602 template <class _Tuple> 603 static constexpr bool __enable_implicit() { 604 return __tuple_convertible<_Tuple, tuple>::value; 605 } 606 607 template <class _Tuple> 608 static constexpr bool __enable_explicit() { 609 return __tuple_constructible<_Tuple, tuple>::value 610 && !__tuple_convertible<_Tuple, tuple>::value; 611 } 612 }; 613 614 template <class _Dummy> 615 struct _CheckTupleLikeConstructor<true, true, _Dummy> 616 { 617 // This trait is used to disable the tuple-like constructor when 618 // the UTypes... constructor should be selected instead. 619 // See LWG issue #2549. 620 template <class _Tuple> 621 using _PreferTupleLikeConstructor = __lazy_or< 622 // Don't attempt the two checks below if the tuple we are given 623 // has the same type as this tuple. 624 is_same<typename __uncvref<_Tuple>::type, tuple>, 625 __lazy_and< 626 __lazy_not<is_constructible<_Tp..., _Tuple>>, 627 __lazy_not<is_convertible<_Tuple, _Tp...>> 628 > 629 >; 630 631 template <class _Tuple> 632 static constexpr bool __enable_implicit() { 633 return __lazy_and< 634 __tuple_convertible<_Tuple, tuple>, 635 _PreferTupleLikeConstructor<_Tuple> 636 >::value; 637 } 638 639 template <class _Tuple> 640 static constexpr bool __enable_explicit() { 641 return __lazy_and< 642 __tuple_constructible<_Tuple, tuple>, 643 _PreferTupleLikeConstructor<_Tuple>, 644 __lazy_not<__tuple_convertible<_Tuple, tuple>> 645 >::value; 646 } 647 }; 648 649 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 650 typename tuple_element<_Jp, tuple<_Up...> >::type& get(tuple<_Up...>&) _NOEXCEPT; 651 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 652 const typename tuple_element<_Jp, tuple<_Up...> >::type& get(const tuple<_Up...>&) _NOEXCEPT; 653 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 654 typename tuple_element<_Jp, tuple<_Up...> >::type&& get(tuple<_Up...>&&) _NOEXCEPT; 655 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11 656 const typename tuple_element<_Jp, tuple<_Up...> >::type&& get(const tuple<_Up...>&&) _NOEXCEPT; 657public: 658 659 template <bool _Dummy = true, class = typename enable_if< 660 __all<__dependent_type<is_default_constructible<_Tp>, _Dummy>::value...>::value 661 >::type> 662 _LIBCPP_INLINE_VISIBILITY 663 _LIBCPP_CONSTEXPR tuple() 664 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {} 665 666 template <class _AllocArgT, class _Alloc, bool _Dummy = true, class = typename enable_if< 667 __lazy_and< 668 is_same<allocator_arg_t, _AllocArgT>, 669 __lazy_all<__dependent_type<is_default_constructible<_Tp>, _Dummy>...> 670 >::value 671 >::type> 672 _LIBCPP_INLINE_VISIBILITY 673 tuple(_AllocArgT, _Alloc const& __a) 674 : base_(allocator_arg_t(), __a, 675 __tuple_indices<>(), __tuple_types<>(), 676 typename __make_tuple_indices<sizeof...(_Tp), 0>::type(), 677 __tuple_types<_Tp...>()) {} 678 679 template <bool _Dummy = true, 680 typename enable_if 681 < 682 _CheckArgsConstructor< 683 _Dummy 684 >::template __enable_implicit<_Tp const&...>(), 685 bool 686 >::type = false 687 > 688 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 689 tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::value)) 690 : base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(), 691 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 692 typename __make_tuple_indices<0>::type(), 693 typename __make_tuple_types<tuple, 0>::type(), 694 __t... 695 ) {} 696 697 template <bool _Dummy = true, 698 typename enable_if 699 < 700 _CheckArgsConstructor< 701 _Dummy 702 >::template __enable_explicit<_Tp const&...>(), 703 bool 704 >::type = false 705 > 706 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 707 explicit tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::value)) 708 : base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(), 709 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 710 typename __make_tuple_indices<0>::type(), 711 typename __make_tuple_types<tuple, 0>::type(), 712 __t... 713 ) {} 714 715 template <class _Alloc, bool _Dummy = true, 716 typename enable_if 717 < 718 _CheckArgsConstructor< 719 _Dummy 720 >::template __enable_implicit<_Tp const&...>(), 721 bool 722 >::type = false 723 > 724 _LIBCPP_INLINE_VISIBILITY 725 tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t) 726 : base_(allocator_arg_t(), __a, 727 typename __make_tuple_indices<sizeof...(_Tp)>::type(), 728 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 729 typename __make_tuple_indices<0>::type(), 730 typename __make_tuple_types<tuple, 0>::type(), 731 __t... 732 ) {} 733 734 template <class _Alloc, bool _Dummy = true, 735 typename enable_if 736 < 737 _CheckArgsConstructor< 738 _Dummy 739 >::template __enable_explicit<_Tp const&...>(), 740 bool 741 >::type = false 742 > 743 _LIBCPP_INLINE_VISIBILITY 744 explicit 745 tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t) 746 : base_(allocator_arg_t(), __a, 747 typename __make_tuple_indices<sizeof...(_Tp)>::type(), 748 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 749 typename __make_tuple_indices<0>::type(), 750 typename __make_tuple_types<tuple, 0>::type(), 751 __t... 752 ) {} 753 754 template <class ..._Up, 755 typename enable_if 756 < 757 _CheckArgsConstructor< 758 sizeof...(_Up) <= sizeof...(_Tp) 759 && !_PackExpandsToThisTuple<_Up...>::value 760 >::template __enable_implicit<_Up...>(), 761 bool 762 >::type = false 763 > 764 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 765 tuple(_Up&&... __u) 766 _NOEXCEPT_(( 767 is_nothrow_constructible<base, 768 typename __make_tuple_indices<sizeof...(_Up)>::type, 769 typename __make_tuple_types<tuple, sizeof...(_Up)>::type, 770 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type, 771 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type, 772 _Up... 773 >::value 774 )) 775 : base_(typename __make_tuple_indices<sizeof...(_Up)>::type(), 776 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 777 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 778 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 779 _VSTD::forward<_Up>(__u)...) {} 780 781 template <class ..._Up, 782 typename enable_if 783 < 784 _CheckArgsConstructor< 785 sizeof...(_Up) <= sizeof...(_Tp) 786 && !_PackExpandsToThisTuple<_Up...>::value 787 >::template __enable_explicit<_Up...>(), 788 bool 789 >::type = false 790 > 791 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 792 explicit 793 tuple(_Up&&... __u) 794 _NOEXCEPT_(( 795 is_nothrow_constructible<base, 796 typename __make_tuple_indices<sizeof...(_Up)>::type, 797 typename __make_tuple_types<tuple, sizeof...(_Up)>::type, 798 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type, 799 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type, 800 _Up... 801 >::value 802 )) 803 : base_(typename __make_tuple_indices<sizeof...(_Up)>::type(), 804 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 805 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 806 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 807 _VSTD::forward<_Up>(__u)...) {} 808 809 template <class _Alloc, class ..._Up, 810 typename enable_if 811 < 812 _CheckArgsConstructor< 813 sizeof...(_Up) == sizeof...(_Tp) && 814 !_PackExpandsToThisTuple<_Up...>::value 815 >::template __enable_implicit<_Up...>(), 816 bool 817 >::type = false 818 > 819 _LIBCPP_INLINE_VISIBILITY 820 tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u) 821 : base_(allocator_arg_t(), __a, 822 typename __make_tuple_indices<sizeof...(_Up)>::type(), 823 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 824 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 825 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 826 _VSTD::forward<_Up>(__u)...) {} 827 828 template <class _Alloc, class ..._Up, 829 typename enable_if 830 < 831 _CheckArgsConstructor< 832 sizeof...(_Up) == sizeof...(_Tp) && 833 !_PackExpandsToThisTuple<_Up...>::value 834 >::template __enable_explicit<_Up...>(), 835 bool 836 >::type = false 837 > 838 _LIBCPP_INLINE_VISIBILITY 839 explicit 840 tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u) 841 : base_(allocator_arg_t(), __a, 842 typename __make_tuple_indices<sizeof...(_Up)>::type(), 843 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 844 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 845 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 846 _VSTD::forward<_Up>(__u)...) {} 847 848 template <class _Tuple, 849 typename enable_if 850 < 851 _CheckTupleLikeConstructor< 852 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 853 && !_PackExpandsToThisTuple<_Tuple>::value 854 >::template __enable_implicit<_Tuple>(), 855 bool 856 >::type = false 857 > 858 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 859 tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value)) 860 : base_(_VSTD::forward<_Tuple>(__t)) {} 861 862 template <class _Tuple, 863 typename enable_if 864 < 865 _CheckTupleLikeConstructor< 866 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 867 && !_PackExpandsToThisTuple<_Tuple>::value 868 >::template __enable_explicit<_Tuple>(), 869 bool 870 >::type = false 871 > 872 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 873 explicit 874 tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value)) 875 : base_(_VSTD::forward<_Tuple>(__t)) {} 876 877 template <class _Alloc, class _Tuple, 878 typename enable_if 879 < 880 _CheckTupleLikeConstructor< 881 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 882 >::template __enable_implicit<_Tuple>(), 883 bool 884 >::type = false 885 > 886 _LIBCPP_INLINE_VISIBILITY 887 tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 888 : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {} 889 890 template <class _Alloc, class _Tuple, 891 typename enable_if 892 < 893 _CheckTupleLikeConstructor< 894 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value 895 >::template __enable_explicit<_Tuple>(), 896 bool 897 >::type = false 898 > 899 _LIBCPP_INLINE_VISIBILITY 900 explicit 901 tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 902 : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {} 903 904 template <class _Tuple, 905 class = typename enable_if 906 < 907 __tuple_assignable<_Tuple, tuple>::value 908 >::type 909 > 910 _LIBCPP_INLINE_VISIBILITY 911 tuple& 912 operator=(_Tuple&& __t) _NOEXCEPT_((is_nothrow_assignable<base&, _Tuple>::value)) 913 { 914 base_.operator=(_VSTD::forward<_Tuple>(__t)); 915 return *this; 916 } 917 918 _LIBCPP_INLINE_VISIBILITY 919 void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 920 {base_.swap(__t.base_);} 921}; 922 923template <> 924class _LIBCPP_TYPE_VIS_ONLY tuple<> 925{ 926public: 927 _LIBCPP_INLINE_VISIBILITY 928 _LIBCPP_CONSTEXPR tuple() _NOEXCEPT {} 929 template <class _Alloc> 930 _LIBCPP_INLINE_VISIBILITY 931 tuple(allocator_arg_t, const _Alloc&) _NOEXCEPT {} 932 template <class _Alloc> 933 _LIBCPP_INLINE_VISIBILITY 934 tuple(allocator_arg_t, const _Alloc&, const tuple&) _NOEXCEPT {} 935 template <class _Up> 936 _LIBCPP_INLINE_VISIBILITY 937 tuple(array<_Up, 0>) _NOEXCEPT {} 938 template <class _Alloc, class _Up> 939 _LIBCPP_INLINE_VISIBILITY 940 tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {} 941 _LIBCPP_INLINE_VISIBILITY 942 void swap(tuple&) _NOEXCEPT {} 943}; 944 945template <class ..._Tp> 946inline _LIBCPP_INLINE_VISIBILITY 947typename enable_if 948< 949 __all<__is_swappable<_Tp>::value...>::value, 950 void 951>::type 952swap(tuple<_Tp...>& __t, tuple<_Tp...>& __u) 953 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 954 {__t.swap(__u);} 955 956// get 957 958template <size_t _Ip, class ..._Tp> 959inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 960typename tuple_element<_Ip, tuple<_Tp...> >::type& 961get(tuple<_Tp...>& __t) _NOEXCEPT 962{ 963 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 964 return static_cast<__tuple_leaf<_Ip, type>&>(__t.base_).get(); 965} 966 967template <size_t _Ip, class ..._Tp> 968inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 969const typename tuple_element<_Ip, tuple<_Tp...> >::type& 970get(const tuple<_Tp...>& __t) _NOEXCEPT 971{ 972 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 973 return static_cast<const __tuple_leaf<_Ip, type>&>(__t.base_).get(); 974} 975 976template <size_t _Ip, class ..._Tp> 977inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 978typename tuple_element<_Ip, tuple<_Tp...> >::type&& 979get(tuple<_Tp...>&& __t) _NOEXCEPT 980{ 981 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 982 return static_cast<type&&>( 983 static_cast<__tuple_leaf<_Ip, type>&&>(__t.base_).get()); 984} 985 986template <size_t _Ip, class ..._Tp> 987inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 988const typename tuple_element<_Ip, tuple<_Tp...> >::type&& 989get(const tuple<_Tp...>&& __t) _NOEXCEPT 990{ 991 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type; 992 return static_cast<const type&&>( 993 static_cast<const __tuple_leaf<_Ip, type>&&>(__t.base_).get()); 994} 995 996#if _LIBCPP_STD_VER > 11 997 998namespace __find_detail { 999 1000static constexpr size_t __not_found = -1; 1001static constexpr size_t __ambiguous = __not_found - 1; 1002 1003inline _LIBCPP_INLINE_VISIBILITY 1004constexpr size_t __find_idx_return(size_t __curr_i, size_t __res, bool __matches) { 1005 return !__matches ? __res : 1006 (__res == __not_found ? __curr_i : __ambiguous); 1007} 1008 1009template <size_t _Nx> 1010inline _LIBCPP_INLINE_VISIBILITY 1011constexpr size_t __find_idx(size_t __i, const bool (&__matches)[_Nx]) { 1012 return __i == _Nx ? __not_found : 1013 __find_idx_return(__i, __find_idx(__i + 1, __matches), __matches[__i]); 1014} 1015 1016template <class _T1, class ..._Args> 1017struct __find_exactly_one_checked { 1018 static constexpr bool __matches[] = {is_same<_T1, _Args>::value...}; 1019 static constexpr size_t value = __find_detail::__find_idx(0, __matches); 1020 static_assert (value != __not_found, "type not found in type list" ); 1021 static_assert(value != __ambiguous,"type occurs more than once in type list"); 1022}; 1023 1024template <class _T1> 1025struct __find_exactly_one_checked<_T1> { 1026 static_assert(!is_same<_T1, _T1>::value, "type not in empty type list"); 1027}; 1028 1029} // namespace __find_detail; 1030 1031template <typename _T1, typename... _Args> 1032struct __find_exactly_one_t 1033 : public __find_detail::__find_exactly_one_checked<_T1, _Args...> { 1034}; 1035 1036template <class _T1, class... _Args> 1037inline _LIBCPP_INLINE_VISIBILITY 1038constexpr _T1& get(tuple<_Args...>& __tup) noexcept 1039{ 1040 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup); 1041} 1042 1043template <class _T1, class... _Args> 1044inline _LIBCPP_INLINE_VISIBILITY 1045constexpr _T1 const& get(tuple<_Args...> const& __tup) noexcept 1046{ 1047 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup); 1048} 1049 1050template <class _T1, class... _Args> 1051inline _LIBCPP_INLINE_VISIBILITY 1052constexpr _T1&& get(tuple<_Args...>&& __tup) noexcept 1053{ 1054 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup)); 1055} 1056 1057template <class _T1, class... _Args> 1058inline _LIBCPP_INLINE_VISIBILITY 1059constexpr _T1 const&& get(tuple<_Args...> const&& __tup) noexcept 1060{ 1061 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup)); 1062} 1063 1064#endif 1065 1066// tie 1067 1068template <class ..._Tp> 1069inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1070tuple<_Tp&...> 1071tie(_Tp&... __t) _NOEXCEPT 1072{ 1073 return tuple<_Tp&...>(__t...); 1074} 1075 1076template <class _Up> 1077struct __ignore_t 1078{ 1079 template <class _Tp> 1080 _LIBCPP_INLINE_VISIBILITY 1081 const __ignore_t& operator=(_Tp&&) const {return *this;} 1082}; 1083 1084namespace { const __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); } 1085 1086template <class _Tp> 1087struct __make_tuple_return_impl 1088{ 1089 typedef _Tp type; 1090}; 1091 1092template <class _Tp> 1093struct __make_tuple_return_impl<reference_wrapper<_Tp> > 1094{ 1095 typedef _Tp& type; 1096}; 1097 1098template <class _Tp> 1099struct __make_tuple_return 1100{ 1101 typedef typename __make_tuple_return_impl<typename decay<_Tp>::type>::type type; 1102}; 1103 1104template <class... _Tp> 1105inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1106tuple<typename __make_tuple_return<_Tp>::type...> 1107make_tuple(_Tp&&... __t) 1108{ 1109 return tuple<typename __make_tuple_return<_Tp>::type...>(_VSTD::forward<_Tp>(__t)...); 1110} 1111 1112template <class... _Tp> 1113inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1114tuple<_Tp&&...> 1115forward_as_tuple(_Tp&&... __t) _NOEXCEPT 1116{ 1117 return tuple<_Tp&&...>(_VSTD::forward<_Tp>(__t)...); 1118} 1119 1120template <size_t _Ip> 1121struct __tuple_equal 1122{ 1123 template <class _Tp, class _Up> 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1125 bool operator()(const _Tp& __x, const _Up& __y) 1126 { 1127 return __tuple_equal<_Ip - 1>()(__x, __y) && _VSTD::get<_Ip-1>(__x) == _VSTD::get<_Ip-1>(__y); 1128 } 1129}; 1130 1131template <> 1132struct __tuple_equal<0> 1133{ 1134 template <class _Tp, class _Up> 1135 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1136 bool operator()(const _Tp&, const _Up&) 1137 { 1138 return true; 1139 } 1140}; 1141 1142template <class ..._Tp, class ..._Up> 1143inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1144bool 1145operator==(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1146{ 1147 return __tuple_equal<sizeof...(_Tp)>()(__x, __y); 1148} 1149 1150template <class ..._Tp, class ..._Up> 1151inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1152bool 1153operator!=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1154{ 1155 return !(__x == __y); 1156} 1157 1158template <size_t _Ip> 1159struct __tuple_less 1160{ 1161 template <class _Tp, class _Up> 1162 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1163 bool operator()(const _Tp& __x, const _Up& __y) 1164 { 1165 const size_t __idx = tuple_size<_Tp>::value - _Ip; 1166 if (_VSTD::get<__idx>(__x) < _VSTD::get<__idx>(__y)) 1167 return true; 1168 if (_VSTD::get<__idx>(__y) < _VSTD::get<__idx>(__x)) 1169 return false; 1170 return __tuple_less<_Ip-1>()(__x, __y); 1171 } 1172}; 1173 1174template <> 1175struct __tuple_less<0> 1176{ 1177 template <class _Tp, class _Up> 1178 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1179 bool operator()(const _Tp&, const _Up&) 1180 { 1181 return false; 1182 } 1183}; 1184 1185template <class ..._Tp, class ..._Up> 1186inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1187bool 1188operator<(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1189{ 1190 return __tuple_less<sizeof...(_Tp)>()(__x, __y); 1191} 1192 1193template <class ..._Tp, class ..._Up> 1194inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1195bool 1196operator>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1197{ 1198 return __y < __x; 1199} 1200 1201template <class ..._Tp, class ..._Up> 1202inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1203bool 1204operator>=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1205{ 1206 return !(__x < __y); 1207} 1208 1209template <class ..._Tp, class ..._Up> 1210inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1211bool 1212operator<=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1213{ 1214 return !(__y < __x); 1215} 1216 1217// tuple_cat 1218 1219template <class _Tp, class _Up> struct __tuple_cat_type; 1220 1221template <class ..._Ttypes, class ..._Utypes> 1222struct __tuple_cat_type<tuple<_Ttypes...>, __tuple_types<_Utypes...> > 1223{ 1224 typedef tuple<_Ttypes..., _Utypes...> type; 1225}; 1226 1227template <class _ResultTuple, bool _Is_Tuple0TupleLike, class ..._Tuples> 1228struct __tuple_cat_return_1 1229{ 1230}; 1231 1232template <class ..._Types, class _Tuple0> 1233struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0> 1234{ 1235 typedef typename __tuple_cat_type<tuple<_Types...>, 1236 typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type>::type 1237 type; 1238}; 1239 1240template <class ..._Types, class _Tuple0, class _Tuple1, class ..._Tuples> 1241struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0, _Tuple1, _Tuples...> 1242 : public __tuple_cat_return_1< 1243 typename __tuple_cat_type< 1244 tuple<_Types...>, 1245 typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type 1246 >::type, 1247 __tuple_like<typename remove_reference<_Tuple1>::type>::value, 1248 _Tuple1, _Tuples...> 1249{ 1250}; 1251 1252template <class ..._Tuples> struct __tuple_cat_return; 1253 1254template <class _Tuple0, class ..._Tuples> 1255struct __tuple_cat_return<_Tuple0, _Tuples...> 1256 : public __tuple_cat_return_1<tuple<>, 1257 __tuple_like<typename remove_reference<_Tuple0>::type>::value, _Tuple0, 1258 _Tuples...> 1259{ 1260}; 1261 1262template <> 1263struct __tuple_cat_return<> 1264{ 1265 typedef tuple<> type; 1266}; 1267 1268inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1269tuple<> 1270tuple_cat() 1271{ 1272 return tuple<>(); 1273} 1274 1275template <class _Rp, class _Indices, class _Tuple0, class ..._Tuples> 1276struct __tuple_cat_return_ref_imp; 1277 1278template <class ..._Types, size_t ..._I0, class _Tuple0> 1279struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, _Tuple0> 1280{ 1281 typedef typename remove_reference<_Tuple0>::type _T0; 1282 typedef tuple<_Types..., typename __apply_cv<_Tuple0, 1283 typename tuple_element<_I0, _T0>::type>::type&&...> type; 1284}; 1285 1286template <class ..._Types, size_t ..._I0, class _Tuple0, class _Tuple1, class ..._Tuples> 1287struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, 1288 _Tuple0, _Tuple1, _Tuples...> 1289 : public __tuple_cat_return_ref_imp< 1290 tuple<_Types..., typename __apply_cv<_Tuple0, 1291 typename tuple_element<_I0, 1292 typename remove_reference<_Tuple0>::type>::type>::type&&...>, 1293 typename __make_tuple_indices<tuple_size<typename 1294 remove_reference<_Tuple1>::type>::value>::type, 1295 _Tuple1, _Tuples...> 1296{ 1297}; 1298 1299template <class _Tuple0, class ..._Tuples> 1300struct __tuple_cat_return_ref 1301 : public __tuple_cat_return_ref_imp<tuple<>, 1302 typename __make_tuple_indices< 1303 tuple_size<typename remove_reference<_Tuple0>::type>::value 1304 >::type, _Tuple0, _Tuples...> 1305{ 1306}; 1307 1308template <class _Types, class _I0, class _J0> 1309struct __tuple_cat; 1310 1311template <class ..._Types, size_t ..._I0, size_t ..._J0> 1312struct __tuple_cat<tuple<_Types...>, __tuple_indices<_I0...>, __tuple_indices<_J0...> > 1313{ 1314 template <class _Tuple0> 1315 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1316 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&>::type 1317 operator()(tuple<_Types...> __t, _Tuple0&& __t0) 1318 { 1319 return forward_as_tuple(_VSTD::forward<_Types>(_VSTD::get<_I0>(__t))..., 1320 _VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))...); 1321 } 1322 1323 template <class _Tuple0, class _Tuple1, class ..._Tuples> 1324 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1325 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&, _Tuple1&&, _Tuples&&...>::type 1326 operator()(tuple<_Types...> __t, _Tuple0&& __t0, _Tuple1&& __t1, _Tuples&& ...__tpls) 1327 { 1328 typedef typename remove_reference<_Tuple0>::type _T0; 1329 typedef typename remove_reference<_Tuple1>::type _T1; 1330 return __tuple_cat< 1331 tuple<_Types..., typename __apply_cv<_Tuple0, typename tuple_element<_J0, _T0>::type>::type&&...>, 1332 typename __make_tuple_indices<sizeof ...(_Types) + tuple_size<_T0>::value>::type, 1333 typename __make_tuple_indices<tuple_size<_T1>::value>::type>() 1334 (forward_as_tuple( 1335 _VSTD::forward<_Types>(_VSTD::get<_I0>(__t))..., 1336 _VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))... 1337 ), 1338 _VSTD::forward<_Tuple1>(__t1), 1339 _VSTD::forward<_Tuples>(__tpls)...); 1340 } 1341}; 1342 1343template <class _Tuple0, class... _Tuples> 1344inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1345typename __tuple_cat_return<_Tuple0, _Tuples...>::type 1346tuple_cat(_Tuple0&& __t0, _Tuples&&... __tpls) 1347{ 1348 typedef typename remove_reference<_Tuple0>::type _T0; 1349 return __tuple_cat<tuple<>, __tuple_indices<>, 1350 typename __make_tuple_indices<tuple_size<_T0>::value>::type>() 1351 (tuple<>(), _VSTD::forward<_Tuple0>(__t0), 1352 _VSTD::forward<_Tuples>(__tpls)...); 1353} 1354 1355template <class ..._Tp, class _Alloc> 1356struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<tuple<_Tp...>, _Alloc> 1357 : true_type {}; 1358 1359template <class _T1, class _T2> 1360template <class... _Args1, class... _Args2, size_t ..._I1, size_t ..._I2> 1361inline _LIBCPP_INLINE_VISIBILITY 1362pair<_T1, _T2>::pair(piecewise_construct_t, 1363 tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args, 1364 __tuple_indices<_I1...>, __tuple_indices<_I2...>) 1365 : first(_VSTD::forward<_Args1>(_VSTD::get<_I1>( __first_args))...), 1366 second(_VSTD::forward<_Args2>(_VSTD::get<_I2>(__second_args))...) 1367{ 1368} 1369 1370#endif // _LIBCPP_HAS_NO_VARIADICS 1371 1372#if _LIBCPP_STD_VER > 14 1373template <class _Tp> 1374constexpr size_t tuple_size_v = tuple_size<_Tp>::value; 1375 1376#define _LIBCPP_NOEXCEPT_RETURN(...) noexcept(noexcept(__VA_ARGS__)) { return __VA_ARGS__; } 1377 1378template <class _Fn, class _Tuple, size_t ..._Id> 1379inline _LIBCPP_INLINE_VISIBILITY 1380constexpr decltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t, 1381 __tuple_indices<_Id...>) 1382_LIBCPP_NOEXCEPT_RETURN( 1383 _VSTD::__invoke_constexpr( 1384 _VSTD::forward<_Fn>(__f), 1385 _VSTD::get<_Id>(_VSTD::forward<_Tuple>(__t))...) 1386) 1387 1388template <class _Fn, class _Tuple> 1389inline _LIBCPP_INLINE_VISIBILITY 1390constexpr decltype(auto) apply(_Fn && __f, _Tuple && __t) 1391_LIBCPP_NOEXCEPT_RETURN( 1392 _VSTD::__apply_tuple_impl( 1393 _VSTD::forward<_Fn>(__f), _VSTD::forward<_Tuple>(__t), 1394 typename __make_tuple_indices<tuple_size_v<decay_t<_Tuple>>>::type{}) 1395) 1396 1397template <class _Tp, class _Tuple, size_t... _Idx> 1398inline _LIBCPP_INLINE_VISIBILITY 1399constexpr _Tp __make_from_tuple_impl(_Tuple&& __t, __tuple_indices<_Idx...>) 1400_LIBCPP_NOEXCEPT_RETURN( 1401 _Tp(_VSTD::get<_Idx>(_VSTD::forward<_Tuple>(__t))...) 1402) 1403 1404template <class _Tp, class _Tuple> 1405inline _LIBCPP_INLINE_VISIBILITY 1406constexpr _Tp make_from_tuple(_Tuple&& __t) 1407_LIBCPP_NOEXCEPT_RETURN( 1408 _VSTD::__make_from_tuple_impl<_Tp>(_VSTD::forward<_Tuple>(__t), 1409 typename __make_tuple_indices<tuple_size_v<decay_t<_Tuple>>>::type{}) 1410) 1411 1412#undef _LIBCPP_NOEXCEPT_RETURN 1413 1414#endif // _LIBCPP_STD_VER > 14 1415 1416_LIBCPP_END_NAMESPACE_STD 1417 1418#endif // _LIBCPP_TUPLE 1419