1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_TUPLE 11#define _LIBCPP_TUPLE 12 13// clang-format off 14 15/* 16 tuple synopsis 17 18namespace std 19{ 20 21template <class... T> 22class tuple { 23public: 24 explicit(see-below) constexpr tuple(); 25 explicit(see-below) tuple(const T&...); // constexpr in C++14 26 template <class... U> 27 explicit(see-below) tuple(U&&...); // constexpr in C++14 28 tuple(const tuple&) = default; 29 tuple(tuple&&) = default; 30 31 template<class... UTypes> 32 constexpr explicit(see-below) tuple(tuple<UTypes...>&); // C++23 33 template <class... U> 34 explicit(see-below) tuple(const tuple<U...>&); // constexpr in C++14 35 template <class... U> 36 explicit(see-below) tuple(tuple<U...>&&); // constexpr in C++14 37 template<class... UTypes> 38 constexpr explicit(see-below) tuple(const tuple<UTypes...>&&); // C++23 39 40 template<class U1, class U2> 41 constexpr explicit(see-below) tuple(pair<U1, U2>&); // iff sizeof...(Types) == 2 // C++23 42 template <class U1, class U2> 43 explicit(see-below) tuple(const pair<U1, U2>&); // iff sizeof...(T) == 2 // constexpr in C++14 44 template <class U1, class U2> 45 explicit(see-below) tuple(pair<U1, U2>&&); // iff sizeof...(T) == 2 // constexpr in C++14 46 template<class U1, class U2> 47 constexpr explicit(see-below) tuple(const pair<U1, U2>&&); // iff sizeof...(Types) == 2 // C++23 48 49 // allocator-extended constructors 50 template <class Alloc> 51 tuple(allocator_arg_t, const Alloc& a); 52 template <class Alloc> 53 explicit(see-below) tuple(allocator_arg_t, const Alloc& a, const T&...); // constexpr in C++20 54 template <class Alloc, class... U> 55 explicit(see-below) tuple(allocator_arg_t, const Alloc& a, U&&...); // constexpr in C++20 56 template <class Alloc> 57 tuple(allocator_arg_t, const Alloc& a, const tuple&); // constexpr in C++20 58 template <class Alloc> 59 tuple(allocator_arg_t, const Alloc& a, tuple&&); // constexpr in C++20 60 template<class Alloc, class... UTypes> 61 constexpr explicit(see-below) 62 tuple(allocator_arg_t, const Alloc& a, tuple<UTypes...>&); // C++23 63 template <class Alloc, class... U> 64 explicit(see-below) tuple(allocator_arg_t, const Alloc& a, const tuple<U...>&); // constexpr in C++20 65 template <class Alloc, class... U> 66 explicit(see-below) tuple(allocator_arg_t, const Alloc& a, tuple<U...>&&); // constexpr in C++20 67 template<class Alloc, class... UTypes> 68 constexpr explicit(see-below) 69 tuple(allocator_arg_t, const Alloc& a, const tuple<UTypes...>&&); // C++23 70 template<class Alloc, class U1, class U2> 71 constexpr explicit(see-below) 72 tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&); // C++23 73 template <class Alloc, class U1, class U2> 74 explicit(see-below) tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&); // constexpr in C++20 75 template <class Alloc, class U1, class U2> 76 explicit(see-below) tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&&); // constexpr in C++20 77 template<class Alloc, class U1, class U2> 78 constexpr explicit(see-below) 79 tuple(allocator_arg_t, const Alloc& a, const pair<U1, U2>&&); // C++23 80 81 tuple& operator=(const tuple&); // constexpr in C++20 82 constexpr const tuple& operator=(const tuple&) const; // C++23 83 tuple& operator=(tuple&&) noexcept(is_nothrow_move_assignable_v<T> && ...); // constexpr in C++20 84 constexpr const tuple& operator=(tuple&&) const; // C++23 85 template <class... U> 86 tuple& operator=(const tuple<U...>&); // constexpr in C++20 87 template<class... UTypes> 88 constexpr const tuple& operator=(const tuple<UTypes...>&) const; // C++23 89 template <class... U> 90 tuple& operator=(tuple<U...>&&); // constexpr in C++20 91 template<class... UTypes> 92 constexpr const tuple& operator=(tuple<UTypes...>&&) const; // C++23 93 template <class U1, class U2> 94 tuple& operator=(const pair<U1, U2>&); // iff sizeof...(T) == 2 // constexpr in C++20 95 template<class U1, class U2> 96 constexpr const tuple& operator=(const pair<U1, U2>&) const; // iff sizeof...(Types) == 2 // C++23 97 template <class U1, class U2> 98 tuple& operator=(pair<U1, U2>&&); // iff sizeof...(T) == 2 // constexpr in C++20 99 template<class U1, class U2> 100 constexpr const tuple& operator=(pair<U1, U2>&&) const; // iff sizeof...(Types) == 2 // C++23 101 102 template<class U, size_t N> 103 tuple& operator=(array<U, N> const&) // iff sizeof...(T) == N, EXTENSION 104 template<class U, size_t N> 105 tuple& operator=(array<U, N>&&) // iff sizeof...(T) == N, EXTENSION 106 107 void swap(tuple&) noexcept(AND(swap(declval<T&>(), declval<T&>())...)); // constexpr in C++20 108 constexpr void swap(const tuple&) const noexcept(see-below); // C++23 109}; 110 111 112template<class... TTypes, class... UTypes, template<class> class TQual, template<class> class UQual> // since C++23 113 requires requires { typename tuple<common_reference_t<TQual<TTypes>, UQual<UTypes>>...>; } 114struct basic_common_reference<tuple<TTypes...>, tuple<UTypes...>, TQual, UQual> { 115 using type = tuple<common_reference_t<TQual<TTypes>, UQual<UTypes>>...>; 116}; 117 118template<class... TTypes, class... UTypes> // since C++23 119 requires requires { typename tuple<common_type_t<TTypes, UTypes>...>; } 120struct common_type<tuple<TTypes...>, tuple<UTypes...>> { 121 using type = tuple<common_type_t<TTypes, UTypes>...>; 122}; 123 124template <class ...T> 125tuple(T...) -> tuple<T...>; // since C++17 126template <class T1, class T2> 127tuple(pair<T1, T2>) -> tuple<T1, T2>; // since C++17 128template <class Alloc, class ...T> 129tuple(allocator_arg_t, Alloc, T...) -> tuple<T...>; // since C++17 130template <class Alloc, class T1, class T2> 131tuple(allocator_arg_t, Alloc, pair<T1, T2>) -> tuple<T1, T2>; // since C++17 132template <class Alloc, class ...T> 133tuple(allocator_arg_t, Alloc, tuple<T...>) -> tuple<T...>; // since C++17 134 135inline constexpr unspecified ignore; 136 137template <class... T> tuple<V...> make_tuple(T&&...); // constexpr in C++14 138template <class... T> tuple<ATypes...> forward_as_tuple(T&&...) noexcept; // constexpr in C++14 139template <class... T> tuple<T&...> tie(T&...) noexcept; // constexpr in C++14 140template <class... Tuples> tuple<CTypes...> tuple_cat(Tuples&&... tpls); // constexpr in C++14 141 142// [tuple.apply], calling a function with a tuple of arguments: 143template <class F, class Tuple> 144 constexpr decltype(auto) apply(F&& f, Tuple&& t); // C++17 145template <class T, class Tuple> 146 constexpr T make_from_tuple(Tuple&& t); // C++17 147 148// 20.4.1.4, tuple helper classes: 149template <class T> struct tuple_size; // undefined 150template <class... T> struct tuple_size<tuple<T...>>; 151template <class T> 152 inline constexpr size_t tuple_size_v = tuple_size<T>::value; // C++17 153template <size_t I, class T> struct tuple_element; // undefined 154template <size_t I, class... T> struct tuple_element<I, tuple<T...>>; 155template <size_t I, class T> 156 using tuple_element_t = typename tuple_element <I, T>::type; // C++14 157 158// 20.4.1.5, element access: 159template <size_t I, class... T> 160 typename tuple_element<I, tuple<T...>>::type& 161 get(tuple<T...>&) noexcept; // constexpr in C++14 162template <size_t I, class... T> 163 const typename tuple_element<I, tuple<T...>>::type& 164 get(const tuple<T...>&) noexcept; // constexpr in C++14 165template <size_t I, class... T> 166 typename tuple_element<I, tuple<T...>>::type&& 167 get(tuple<T...>&&) noexcept; // constexpr in C++14 168template <size_t I, class... T> 169 const typename tuple_element<I, tuple<T...>>::type&& 170 get(const tuple<T...>&&) noexcept; // constexpr in C++14 171 172template <class T1, class... T> 173 constexpr T1& get(tuple<T...>&) noexcept; // C++14 174template <class T1, class... T> 175 constexpr const T1& get(const tuple<T...>&) noexcept; // C++14 176template <class T1, class... T> 177 constexpr T1&& get(tuple<T...>&&) noexcept; // C++14 178template <class T1, class... T> 179 constexpr const T1&& get(const tuple<T...>&&) noexcept; // C++14 180 181// 20.4.1.6, relational operators: 182template<class... T, class... U> bool operator==(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14 183template<class... T, class... U> bool operator<(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20 184template<class... T, class... U> bool operator!=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20 185template<class... T, class... U> bool operator>(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20 186template<class... T, class... U> bool operator<=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20 187template<class... T, class... U> bool operator>=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14, removed in C++20 188template<class... T, class... U> 189 constexpr common_comparison_category_t<synth-three-way-result<T, U>...> 190 operator<=>(const tuple<T...>&, const tuple<U...>&); // since C++20 191 192template <class... Types, class Alloc> 193 struct uses_allocator<tuple<Types...>, Alloc>; 194 195template <class... Types> 196 void 197 swap(tuple<Types...>& x, tuple<Types...>& y) noexcept(noexcept(x.swap(y))); 198 199template <class... Types> 200 constexpr void swap(const tuple<Types...>& x, const tuple<Types...>& y) noexcept(see-below); // C++23 201 202} // std 203 204*/ 205 206// clang-format on 207 208#include <__assert> // all public C++ headers provide the assertion handler 209#include <__compare/common_comparison_category.h> 210#include <__compare/synth_three_way.h> 211#include <__config> 212#include <__functional/invoke.h> 213#include <__fwd/array.h> 214#include <__fwd/get.h> 215#include <__fwd/tuple.h> 216#include <__memory/allocator_arg_t.h> 217#include <__memory/uses_allocator.h> 218#include <__tuple/make_tuple_types.h> 219#include <__tuple/sfinae_helpers.h> 220#include <__tuple/tuple_element.h> 221#include <__tuple/tuple_indices.h> 222#include <__tuple/tuple_like_ext.h> 223#include <__tuple/tuple_size.h> 224#include <__tuple/tuple_types.h> 225#include <__type_traits/apply_cv.h> 226#include <__type_traits/common_reference.h> 227#include <__type_traits/common_type.h> 228#include <__type_traits/conditional.h> 229#include <__type_traits/conjunction.h> 230#include <__type_traits/copy_cvref.h> 231#include <__type_traits/disjunction.h> 232#include <__type_traits/is_arithmetic.h> 233#include <__type_traits/is_assignable.h> 234#include <__type_traits/is_constructible.h> 235#include <__type_traits/is_convertible.h> 236#include <__type_traits/is_copy_assignable.h> 237#include <__type_traits/is_copy_constructible.h> 238#include <__type_traits/is_default_constructible.h> 239#include <__type_traits/is_empty.h> 240#include <__type_traits/is_final.h> 241#include <__type_traits/is_implicitly_default_constructible.h> 242#include <__type_traits/is_move_assignable.h> 243#include <__type_traits/is_move_constructible.h> 244#include <__type_traits/is_nothrow_assignable.h> 245#include <__type_traits/is_nothrow_constructible.h> 246#include <__type_traits/is_nothrow_copy_assignable.h> 247#include <__type_traits/is_nothrow_copy_constructible.h> 248#include <__type_traits/is_nothrow_default_constructible.h> 249#include <__type_traits/is_nothrow_move_assignable.h> 250#include <__type_traits/is_reference.h> 251#include <__type_traits/is_same.h> 252#include <__type_traits/is_swappable.h> 253#include <__type_traits/lazy.h> 254#include <__type_traits/maybe_const.h> 255#include <__type_traits/nat.h> 256#include <__type_traits/negation.h> 257#include <__type_traits/remove_cvref.h> 258#include <__type_traits/remove_reference.h> 259#include <__type_traits/unwrap_ref.h> 260#include <__utility/forward.h> 261#include <__utility/integer_sequence.h> 262#include <__utility/move.h> 263#include <__utility/pair.h> 264#include <__utility/piecewise_construct.h> 265#include <__utility/swap.h> 266#include <cstddef> 267#include <version> 268 269// standard-mandated includes 270 271// [tuple.syn] 272#include <compare> 273 274#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 275# pragma GCC system_header 276#endif 277 278_LIBCPP_PUSH_MACROS 279#include <__undef_macros> 280 281_LIBCPP_BEGIN_NAMESPACE_STD 282 283#ifndef _LIBCPP_CXX03_LANG 284 285 286// __tuple_leaf 287 288template <size_t _Ip, class _Hp, 289 bool=is_empty<_Hp>::value && !__libcpp_is_final<_Hp>::value 290 > 291class __tuple_leaf; 292 293template <size_t _Ip, class _Hp, bool _Ep> 294inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 295void swap(__tuple_leaf<_Ip, _Hp, _Ep>& __x, __tuple_leaf<_Ip, _Hp, _Ep>& __y) 296 _NOEXCEPT_(__is_nothrow_swappable<_Hp>::value) 297{ 298 swap(__x.get(), __y.get()); 299} 300 301template <size_t _Ip, class _Hp, bool _Ep> 302_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 303void swap(const __tuple_leaf<_Ip, _Hp, _Ep>& __x, const __tuple_leaf<_Ip, _Hp, _Ep>& __y) 304 _NOEXCEPT_(__is_nothrow_swappable<const _Hp>::value) { 305 swap(__x.get(), __y.get()); 306} 307 308template <size_t _Ip, class _Hp, bool> 309class __tuple_leaf 310{ 311 _Hp __value_; 312 313 template <class _Tp> 314 static _LIBCPP_HIDE_FROM_ABI constexpr bool __can_bind_reference() { 315#if __has_keyword(__reference_binds_to_temporary) 316 return !__reference_binds_to_temporary(_Hp, _Tp); 317#else 318 return true; 319#endif 320 } 321 322 _LIBCPP_CONSTEXPR_SINCE_CXX14 323 __tuple_leaf& operator=(const __tuple_leaf&); 324public: 325 _LIBCPP_HIDE_FROM_ABI constexpr __tuple_leaf() 326 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) : __value_() 327 {static_assert(!is_reference<_Hp>::value, 328 "Attempted to default construct a reference element in a tuple");} 329 330 template <class _Alloc> 331 _LIBCPP_HIDE_FROM_ABI constexpr 332 __tuple_leaf(integral_constant<int, 0>, const _Alloc&) 333 : __value_() 334 {static_assert(!is_reference<_Hp>::value, 335 "Attempted to default construct a reference element in a tuple");} 336 337 template <class _Alloc> 338 _LIBCPP_HIDE_FROM_ABI constexpr 339 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a) 340 : __value_(allocator_arg_t(), __a) 341 {static_assert(!is_reference<_Hp>::value, 342 "Attempted to default construct a reference element in a tuple");} 343 344 template <class _Alloc> 345 _LIBCPP_HIDE_FROM_ABI constexpr 346 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) 347 : __value_(__a) 348 {static_assert(!is_reference<_Hp>::value, 349 "Attempted to default construct a reference element in a tuple");} 350 351 template <class _Tp, 352 class = __enable_if_t< 353 _And< 354 _IsNotSame<__remove_cvref_t<_Tp>, __tuple_leaf>, 355 is_constructible<_Hp, _Tp> 356 >::value 357 > 358 > 359 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 360 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value)) 361 : __value_(std::forward<_Tp>(__t)) 362 {static_assert(__can_bind_reference<_Tp&&>(), 363 "Attempted construction of reference element binds to a temporary whose lifetime has ended");} 364 365 template <class _Tp, class _Alloc> 366 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 367 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) 368 : __value_(std::forward<_Tp>(__t)) 369 {static_assert(__can_bind_reference<_Tp&&>(), 370 "Attempted construction of reference element binds to a temporary whose lifetime has ended");} 371 372 template <class _Tp, class _Alloc> 373 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 374 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) 375 : __value_(allocator_arg_t(), __a, std::forward<_Tp>(__t)) 376 {static_assert(!is_reference<_Hp>::value, 377 "Attempted to uses-allocator construct a reference element in a tuple");} 378 379 template <class _Tp, class _Alloc> 380 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 381 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) 382 : __value_(std::forward<_Tp>(__t), __a) 383 {static_assert(!is_reference<_Hp>::value, 384 "Attempted to uses-allocator construct a reference element in a tuple");} 385 386 _LIBCPP_HIDE_FROM_ABI __tuple_leaf(const __tuple_leaf& __t) = default; 387 _LIBCPP_HIDE_FROM_ABI __tuple_leaf(__tuple_leaf&& __t) = default; 388 389 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 390 int swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value) 391 { 392 std::swap(*this, __t); 393 return 0; 394 } 395 396 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 397 int swap(const __tuple_leaf& __t) const _NOEXCEPT_(__is_nothrow_swappable<const __tuple_leaf>::value) { 398 std::swap(*this, __t); 399 return 0; 400 } 401 402 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Hp& get() _NOEXCEPT {return __value_;} 403 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Hp& get() const _NOEXCEPT {return __value_;} 404}; 405 406template <size_t _Ip, class _Hp> 407class __tuple_leaf<_Ip, _Hp, true> 408 : private _Hp 409{ 410 _LIBCPP_CONSTEXPR_SINCE_CXX14 411 __tuple_leaf& operator=(const __tuple_leaf&); 412public: 413 _LIBCPP_HIDE_FROM_ABI constexpr __tuple_leaf() 414 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {} 415 416 template <class _Alloc> 417 _LIBCPP_HIDE_FROM_ABI constexpr 418 __tuple_leaf(integral_constant<int, 0>, const _Alloc&) {} 419 420 template <class _Alloc> 421 _LIBCPP_HIDE_FROM_ABI constexpr 422 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a) 423 : _Hp(allocator_arg_t(), __a) {} 424 425 template <class _Alloc> 426 _LIBCPP_HIDE_FROM_ABI constexpr 427 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a) 428 : _Hp(__a) {} 429 430 template <class _Tp, 431 class = __enable_if_t< 432 _And< 433 _IsNotSame<__remove_cvref_t<_Tp>, __tuple_leaf>, 434 is_constructible<_Hp, _Tp> 435 >::value 436 > 437 > 438 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 439 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value)) 440 : _Hp(std::forward<_Tp>(__t)) {} 441 442 template <class _Tp, class _Alloc> 443 _LIBCPP_HIDE_FROM_ABI constexpr 444 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t) 445 : _Hp(std::forward<_Tp>(__t)) {} 446 447 template <class _Tp, class _Alloc> 448 _LIBCPP_HIDE_FROM_ABI constexpr 449 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t) 450 : _Hp(allocator_arg_t(), __a, std::forward<_Tp>(__t)) {} 451 452 template <class _Tp, class _Alloc> 453 _LIBCPP_HIDE_FROM_ABI constexpr 454 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t) 455 : _Hp(std::forward<_Tp>(__t), __a) {} 456 457 __tuple_leaf(__tuple_leaf const &) = default; 458 __tuple_leaf(__tuple_leaf &&) = default; 459 460 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 461 int 462 swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value) 463 { 464 std::swap(*this, __t); 465 return 0; 466 } 467 468 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 469 int swap(const __tuple_leaf& __rhs) const _NOEXCEPT_(__is_nothrow_swappable<const __tuple_leaf>::value) { 470 std::swap(*this, __rhs); 471 return 0; 472 } 473 474 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Hp& get() _NOEXCEPT {return static_cast<_Hp&>(*this);} 475 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const _Hp& get() const _NOEXCEPT {return static_cast<const _Hp&>(*this);} 476}; 477 478template <class ..._Tp> 479_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 480void __swallow(_Tp&&...) _NOEXCEPT {} 481 482template <class _Tp> 483struct __all_default_constructible; 484 485template <class ..._Tp> 486struct __all_default_constructible<__tuple_types<_Tp...>> 487 : __all<is_default_constructible<_Tp>::value...> 488{ }; 489 490// __tuple_impl 491 492template<class _Indx, class ..._Tp> struct __tuple_impl; 493 494template<size_t ..._Indx, class ..._Tp> 495struct _LIBCPP_DECLSPEC_EMPTY_BASES __tuple_impl<__tuple_indices<_Indx...>, _Tp...> 496 : public __tuple_leaf<_Indx, _Tp>... 497{ 498 _LIBCPP_HIDE_FROM_ABI 499 constexpr __tuple_impl() 500 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {} 501 502 template <size_t ..._Uf, class ..._Tf, 503 size_t ..._Ul, class ..._Tl, class ..._Up> 504 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 505 explicit 506 __tuple_impl(__tuple_indices<_Uf...>, __tuple_types<_Tf...>, 507 __tuple_indices<_Ul...>, __tuple_types<_Tl...>, 508 _Up&&... __u) 509 _NOEXCEPT_((__all<is_nothrow_constructible<_Tf, _Up>::value...>::value && 510 __all<is_nothrow_default_constructible<_Tl>::value...>::value)) : 511 __tuple_leaf<_Uf, _Tf>(std::forward<_Up>(__u))..., 512 __tuple_leaf<_Ul, _Tl>()... 513 {} 514 515 template <class _Alloc, size_t ..._Uf, class ..._Tf, 516 size_t ..._Ul, class ..._Tl, class ..._Up> 517 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 518 explicit 519 __tuple_impl(allocator_arg_t, const _Alloc& __a, 520 __tuple_indices<_Uf...>, __tuple_types<_Tf...>, 521 __tuple_indices<_Ul...>, __tuple_types<_Tl...>, 522 _Up&&... __u) : 523 __tuple_leaf<_Uf, _Tf>(__uses_alloc_ctor<_Tf, _Alloc, _Up>(), __a, 524 std::forward<_Up>(__u))..., 525 __tuple_leaf<_Ul, _Tl>(__uses_alloc_ctor<_Tl, _Alloc>(), __a)... 526 {} 527 528 template <class _Tuple, 529 class = __enable_if_t<__tuple_constructible<_Tuple, tuple<_Tp...> >::value> 530 > 531 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 532 __tuple_impl(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_constructible<_Tp, typename tuple_element<_Indx, 533 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value)) 534 : __tuple_leaf<_Indx, _Tp>(std::forward<typename tuple_element<_Indx, 535 typename __make_tuple_types<_Tuple>::type>::type>(std::get<_Indx>(__t)))... 536 {} 537 538 template <class _Alloc, class _Tuple, 539 class = __enable_if_t<__tuple_constructible<_Tuple, tuple<_Tp...> >::value> 540 > 541 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 542 __tuple_impl(allocator_arg_t, const _Alloc& __a, _Tuple&& __t) 543 : __tuple_leaf<_Indx, _Tp>(__uses_alloc_ctor<_Tp, _Alloc, typename tuple_element<_Indx, 544 typename __make_tuple_types<_Tuple>::type>::type>(), __a, 545 std::forward<typename tuple_element<_Indx, 546 typename __make_tuple_types<_Tuple>::type>::type>(std::get<_Indx>(__t)))... 547 {} 548 549 __tuple_impl(const __tuple_impl&) = default; 550 __tuple_impl(__tuple_impl&&) = default; 551 552 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 553 void swap(__tuple_impl& __t) 554 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 555 { 556 std::__swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t))...); 557 } 558 559 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 560 void swap(const __tuple_impl& __t) const 561 _NOEXCEPT_(__all<__is_nothrow_swappable<const _Tp>::value...>::value) 562 { 563 std::__swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<const __tuple_leaf<_Indx, _Tp>&>(__t))...); 564 } 565}; 566 567template<class _Dest, class _Source, size_t ..._Np> 568_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 569void __memberwise_copy_assign(_Dest& __dest, _Source const& __source, __tuple_indices<_Np...>) { 570 std::__swallow(((std::get<_Np>(__dest) = std::get<_Np>(__source)), void(), 0)...); 571} 572 573template<class _Dest, class _Source, class ..._Up, size_t ..._Np> 574_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 575void __memberwise_forward_assign(_Dest& __dest, _Source&& __source, __tuple_types<_Up...>, __tuple_indices<_Np...>) { 576 std::__swallow((( 577 std::get<_Np>(__dest) = std::forward<_Up>(std::get<_Np>(__source)) 578 ), void(), 0)...); 579} 580 581template <class ..._Tp> 582class _LIBCPP_TEMPLATE_VIS tuple 583{ 584 typedef __tuple_impl<typename __make_tuple_indices<sizeof...(_Tp)>::type, _Tp...> _BaseT; 585 586 _BaseT __base_; 587 588 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_SINCE_CXX14 589 typename tuple_element<_Jp, tuple<_Up...> >::type& get(tuple<_Up...>&) _NOEXCEPT; 590 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_SINCE_CXX14 591 const typename tuple_element<_Jp, tuple<_Up...> >::type& get(const tuple<_Up...>&) _NOEXCEPT; 592 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_SINCE_CXX14 593 typename tuple_element<_Jp, tuple<_Up...> >::type&& get(tuple<_Up...>&&) _NOEXCEPT; 594 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_SINCE_CXX14 595 const typename tuple_element<_Jp, tuple<_Up...> >::type&& get(const tuple<_Up...>&&) _NOEXCEPT; 596public: 597 // [tuple.cnstr] 598 599_LIBCPP_DIAGNOSTIC_PUSH 600_LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wc++20-extensions") 601_LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wc++20-extensions") 602 603 // tuple() constructors (including allocator_arg_t variants) 604 template <template<class...> class _IsImpDefault = __is_implicitly_default_constructible, 605 template<class...> class _IsDefault = is_default_constructible, __enable_if_t< 606 _And< 607 _IsDefault<_Tp>... 608 >::value 609 , int> = 0> 610 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR 611 explicit(_Not<_Lazy<_And, _IsImpDefault<_Tp>...> >::value) tuple() 612 _NOEXCEPT_(_And<is_nothrow_default_constructible<_Tp>...>::value) 613 { } 614 615 template <class _Alloc, 616 template<class...> class _IsImpDefault = __is_implicitly_default_constructible, 617 template<class...> class _IsDefault = is_default_constructible, __enable_if_t< 618 _And< 619 _IsDefault<_Tp>... 620 >::value 621 , int> = 0> 622 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 623 explicit(_Not<_Lazy<_And, _IsImpDefault<_Tp>...> >::value) tuple(allocator_arg_t, _Alloc const& __a) 624 : __base_(allocator_arg_t(), __a, 625 __tuple_indices<>(), __tuple_types<>(), 626 typename __make_tuple_indices<sizeof...(_Tp), 0>::type(), 627 __tuple_types<_Tp...>()) {} 628 629 // tuple(const T&...) constructors (including allocator_arg_t variants) 630 template <template<class...> class _And = _And, __enable_if_t< 631 _And< 632 _BoolConstant<sizeof...(_Tp) >= 1>, 633 is_copy_constructible<_Tp>... 634 >::value 635 , int> = 0> 636 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 637 explicit(_Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> >::value) tuple(const _Tp& ... __t) 638 _NOEXCEPT_(_And<is_nothrow_copy_constructible<_Tp>...>::value) 639 : __base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(), 640 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 641 typename __make_tuple_indices<0>::type(), 642 typename __make_tuple_types<tuple, 0>::type(), 643 __t... 644 ) {} 645 646 template <class _Alloc, template<class...> class _And = _And, __enable_if_t< 647 _And< 648 _BoolConstant<sizeof...(_Tp) >= 1>, 649 is_copy_constructible<_Tp>... 650 >::value 651 , int> = 0> 652 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 653 explicit(_Not<_Lazy<_And, is_convertible<const _Tp&, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t) 654 : __base_(allocator_arg_t(), __a, 655 typename __make_tuple_indices<sizeof...(_Tp)>::type(), 656 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(), 657 typename __make_tuple_indices<0>::type(), 658 typename __make_tuple_types<tuple, 0>::type(), 659 __t... 660 ) {} 661 662 // tuple(U&& ...) constructors (including allocator_arg_t variants) 663 template <class ..._Up> struct _IsThisTuple : false_type { }; 664 template <class _Up> struct _IsThisTuple<_Up> : is_same<__remove_cvref_t<_Up>, tuple> { }; 665 666 template <class ..._Up> 667 struct _EnableUTypesCtor : _And< 668 _BoolConstant<sizeof...(_Tp) >= 1>, 669 _Not<_IsThisTuple<_Up...> >, // extension to allow mis-behaved user constructors 670 is_constructible<_Tp, _Up>... 671 > { }; 672 673 template <class ..._Up, __enable_if_t< 674 _And< 675 _BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>, 676 _EnableUTypesCtor<_Up...> 677 >::value 678 , int> = 0> 679 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 680 explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(_Up&&... __u) 681 _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value)) 682 : __base_(typename __make_tuple_indices<sizeof...(_Up)>::type(), 683 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 684 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 685 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 686 std::forward<_Up>(__u)...) {} 687 688 template <class _Alloc, class ..._Up, __enable_if_t< 689 _And< 690 _BoolConstant<sizeof...(_Up) == sizeof...(_Tp)>, 691 _EnableUTypesCtor<_Up...> 692 >::value 693 , int> = 0> 694 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 695 explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u) 696 : __base_(allocator_arg_t(), __a, 697 typename __make_tuple_indices<sizeof...(_Up)>::type(), 698 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(), 699 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(), 700 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(), 701 std::forward<_Up>(__u)...) {} 702 703 // Copy and move constructors (including the allocator_arg_t variants) 704 tuple(const tuple&) = default; 705 tuple(tuple&&) = default; 706 707 template <class _Alloc, template<class...> class _And = _And, __enable_if_t< 708 _And<is_copy_constructible<_Tp>...>::value 709 , int> = 0> 710 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 711 tuple(allocator_arg_t, const _Alloc& __alloc, const tuple& __t) 712 : __base_(allocator_arg_t(), __alloc, __t) 713 { } 714 715 template <class _Alloc, template<class...> class _And = _And, __enable_if_t< 716 _And<is_move_constructible<_Tp>...>::value 717 , int> = 0> 718 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 719 tuple(allocator_arg_t, const _Alloc& __alloc, tuple&& __t) 720 : __base_(allocator_arg_t(), __alloc, std::move(__t)) 721 { } 722 723 // tuple(const tuple<U...>&) constructors (including allocator_arg_t variants) 724 725 template <class _OtherTuple, class _DecayedOtherTuple = __remove_cvref_t<_OtherTuple>, class = void> 726 struct _EnableCtorFromUTypesTuple : false_type {}; 727 728 template <class _OtherTuple, class... _Up> 729 struct _EnableCtorFromUTypesTuple<_OtherTuple, tuple<_Up...>, 730 // the length of the packs needs to checked first otherwise the 2 packs cannot be expanded simultaneously below 731 __enable_if_t<sizeof...(_Up) == sizeof...(_Tp)>> : _And< 732 // the two conditions below are not in spec. The purpose is to disable the UTypes Ctor when copy/move Ctor can work. 733 // Otherwise, is_constructible can trigger hard error in those cases https://godbolt.org/z/M94cGdKcE 734 _Not<is_same<_OtherTuple, const tuple&> >, 735 _Not<is_same<_OtherTuple, tuple&&> >, 736 is_constructible<_Tp, __copy_cvref_t<_OtherTuple, _Up> >..., 737 _Lazy<_Or, _BoolConstant<sizeof...(_Tp) != 1>, 738 // _Tp and _Up are 1-element packs - the pack expansions look 739 // weird to avoid tripping up the type traits in degenerate cases 740 _Lazy<_And, 741 _Not<is_same<_Tp, _Up> >..., 742 _Not<is_convertible<_OtherTuple, _Tp> >..., 743 _Not<is_constructible<_Tp, _OtherTuple> >... 744 > 745 > 746 > {}; 747 748 template <class ..._Up, __enable_if_t< 749 _And< 750 _EnableCtorFromUTypesTuple<const tuple<_Up...>&> 751 >::value 752 , int> = 0> 753 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 754 explicit(_Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> >::value) tuple(const tuple<_Up...>& __t) 755 _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, const _Up&>...>::value)) 756 : __base_(__t) 757 { } 758 759 template <class ..._Up, class _Alloc, __enable_if_t< 760 _And< 761 _EnableCtorFromUTypesTuple<const tuple<_Up...>&> 762 >::value 763 , int> = 0> 764 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 765 explicit(_Not<_Lazy<_And, is_convertible<const _Up&, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, const tuple<_Up...>& __t) 766 : __base_(allocator_arg_t(), __a, __t) 767 { } 768 769#if _LIBCPP_STD_VER >= 23 770 // tuple(tuple<U...>&) constructors (including allocator_arg_t variants) 771 772 template <class... _Up, enable_if_t< 773 _EnableCtorFromUTypesTuple<tuple<_Up...>&>::value>* = nullptr> 774 _LIBCPP_HIDE_FROM_ABI constexpr 775 explicit(!_Lazy<_And, is_convertible<_Up&, _Tp>...>::value) 776 tuple(tuple<_Up...>& __t) : __base_(__t) {} 777 778 template <class _Alloc, class... _Up, enable_if_t< 779 _EnableCtorFromUTypesTuple<tuple<_Up...>&>::value>* = nullptr> 780 _LIBCPP_HIDE_FROM_ABI constexpr 781 explicit(!_Lazy<_And, is_convertible<_Up&, _Tp>...>::value) 782 tuple(allocator_arg_t, const _Alloc& __alloc, tuple<_Up...>& __t) : __base_(allocator_arg_t(), __alloc, __t) {} 783#endif // _LIBCPP_STD_VER >= 23 784 785 // tuple(tuple<U...>&&) constructors (including allocator_arg_t variants) 786 template <class ..._Up, __enable_if_t< 787 _And< 788 _EnableCtorFromUTypesTuple<tuple<_Up...>&&> 789 >::value 790 , int> = 0> 791 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 792 explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(tuple<_Up...>&& __t) 793 _NOEXCEPT_((_And<is_nothrow_constructible<_Tp, _Up>...>::value)) 794 : __base_(std::move(__t)) 795 { } 796 797 template <class _Alloc, class ..._Up, __enable_if_t< 798 _And< 799 _EnableCtorFromUTypesTuple<tuple<_Up...>&&> 800 >::value 801 , int> = 0> 802 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 803 explicit(_Not<_Lazy<_And, is_convertible<_Up, _Tp>...> >::value) tuple(allocator_arg_t, const _Alloc& __a, tuple<_Up...>&& __t) 804 : __base_(allocator_arg_t(), __a, std::move(__t)) 805 { } 806 807#if _LIBCPP_STD_VER >= 23 808 // tuple(const tuple<U...>&&) constructors (including allocator_arg_t variants) 809 810 template <class... _Up, enable_if_t< 811 _EnableCtorFromUTypesTuple<const tuple<_Up...>&&>::value>* = nullptr> 812 _LIBCPP_HIDE_FROM_ABI constexpr 813 explicit(!_Lazy<_And, is_convertible<const _Up&&, _Tp>...>::value) 814 tuple(const tuple<_Up...>&& __t) : __base_(std::move(__t)) {} 815 816 template <class _Alloc, class... _Up, enable_if_t< 817 _EnableCtorFromUTypesTuple<const tuple<_Up...>&&>::value>* = nullptr> 818 _LIBCPP_HIDE_FROM_ABI constexpr 819 explicit(!_Lazy<_And, is_convertible<const _Up&&, _Tp>...>::value) 820 tuple(allocator_arg_t, const _Alloc& __alloc, const tuple<_Up...>&& __t) 821 : __base_(allocator_arg_t(), __alloc, std::move(__t)) {} 822#endif // _LIBCPP_STD_VER >= 23 823 824 // tuple(const pair<U1, U2>&) constructors (including allocator_arg_t variants) 825 826 template <template <class...> class _Pred, class _Pair, class _DecayedPair = __remove_cvref_t<_Pair>, class _Tuple = tuple> 827 struct _CtorPredicateFromPair : false_type{}; 828 829 template <template <class...> class _Pred, class _Pair, class _Up1, class _Up2, class _Tp1, class _Tp2> 830 struct _CtorPredicateFromPair<_Pred, _Pair, pair<_Up1, _Up2>, tuple<_Tp1, _Tp2> > : _And< 831 _Pred<_Tp1, __copy_cvref_t<_Pair, _Up1> >, 832 _Pred<_Tp2, __copy_cvref_t<_Pair, _Up2> > 833 > {}; 834 835 template <class _Pair> 836 struct _EnableCtorFromPair : _CtorPredicateFromPair<is_constructible, _Pair>{}; 837 838 template <class _Pair> 839 struct _NothrowConstructibleFromPair : _CtorPredicateFromPair<is_nothrow_constructible, _Pair>{}; 840 841 template <class _Pair, class _DecayedPair = __remove_cvref_t<_Pair>, class _Tuple = tuple> 842 struct _BothImplicitlyConvertible : false_type{}; 843 844 template <class _Pair, class _Up1, class _Up2, class _Tp1, class _Tp2> 845 struct _BothImplicitlyConvertible<_Pair, pair<_Up1, _Up2>, tuple<_Tp1, _Tp2> > : _And< 846 is_convertible<__copy_cvref_t<_Pair, _Up1>, _Tp1>, 847 is_convertible<__copy_cvref_t<_Pair, _Up2>, _Tp2> 848 > {}; 849 850 template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t< 851 _And< 852 _EnableCtorFromPair<const pair<_Up1, _Up2>&> 853 >::value 854 , int> = 0> 855 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 856 explicit(_Not<_BothImplicitlyConvertible<const pair<_Up1, _Up2>&> >::value) tuple(const pair<_Up1, _Up2>& __p) 857 _NOEXCEPT_((_NothrowConstructibleFromPair<const pair<_Up1, _Up2>&>::value)) 858 : __base_(__p) 859 { } 860 861 template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t< 862 _And< 863 _EnableCtorFromPair<const pair<_Up1, _Up2>&> 864 >::value 865 , int> = 0> 866 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 867 explicit(_Not<_BothImplicitlyConvertible<const pair<_Up1, _Up2>&> >::value) tuple(allocator_arg_t, const _Alloc& __a, const pair<_Up1, _Up2>& __p) 868 : __base_(allocator_arg_t(), __a, __p) 869 { } 870 871#if _LIBCPP_STD_VER >= 23 872 // tuple(pair<U1, U2>&) constructors (including allocator_arg_t variants) 873 874 template <class _U1, class _U2, enable_if_t< 875 _EnableCtorFromPair<pair<_U1, _U2>&>::value>* = nullptr> 876 _LIBCPP_HIDE_FROM_ABI constexpr 877 explicit(!_BothImplicitlyConvertible<pair<_U1, _U2>&>::value) 878 tuple(pair<_U1, _U2>& __p) : __base_(__p) {} 879 880 template <class _Alloc, class _U1, class _U2, enable_if_t< 881 _EnableCtorFromPair<std::pair<_U1, _U2>&>::value>* = nullptr> 882 _LIBCPP_HIDE_FROM_ABI constexpr 883 explicit(!_BothImplicitlyConvertible<pair<_U1, _U2>&>::value) 884 tuple(allocator_arg_t, const _Alloc& __alloc, pair<_U1, _U2>& __p) : __base_(allocator_arg_t(), __alloc, __p) {} 885#endif 886 887 // tuple(pair<U1, U2>&&) constructors (including allocator_arg_t variants) 888 889 template <class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t< 890 _And< 891 _EnableCtorFromPair<pair<_Up1, _Up2>&&> 892 >::value 893 , int> = 0> 894 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 895 explicit(_Not<_BothImplicitlyConvertible<pair<_Up1, _Up2>&&> >::value) tuple(pair<_Up1, _Up2>&& __p) 896 _NOEXCEPT_((_NothrowConstructibleFromPair<pair<_Up1, _Up2>&&>::value)) 897 : __base_(std::move(__p)) 898 { } 899 900 template <class _Alloc, class _Up1, class _Up2, template<class...> class _And = _And, __enable_if_t< 901 _And< 902 _EnableCtorFromPair<pair<_Up1, _Up2>&&> 903 >::value 904 , int> = 0> 905 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 906 explicit(_Not<_BothImplicitlyConvertible<pair<_Up1, _Up2>&&> >::value) tuple(allocator_arg_t, const _Alloc& __a, pair<_Up1, _Up2>&& __p) 907 : __base_(allocator_arg_t(), __a, std::move(__p)) 908 { } 909 910#if _LIBCPP_STD_VER >= 23 911 // tuple(const pair<U1, U2>&&) constructors (including allocator_arg_t variants) 912 913 template <class _U1, class _U2, enable_if_t< 914 _EnableCtorFromPair<const pair<_U1, _U2>&&>::value>* = nullptr> 915 _LIBCPP_HIDE_FROM_ABI constexpr 916 explicit(!_BothImplicitlyConvertible<const pair<_U1, _U2>&&>::value) 917 tuple(const pair<_U1, _U2>&& __p) : __base_(std::move(__p)) {} 918 919 template <class _Alloc, class _U1, class _U2, enable_if_t< 920 _EnableCtorFromPair<const pair<_U1, _U2>&&>::value>* = nullptr> 921 _LIBCPP_HIDE_FROM_ABI constexpr 922 explicit(!_BothImplicitlyConvertible<const pair<_U1, _U2>&&>::value) 923 tuple(allocator_arg_t, const _Alloc& __alloc, const pair<_U1, _U2>&& __p) 924 : __base_(allocator_arg_t(), __alloc, std::move(__p)) {} 925#endif // _LIBCPP_STD_VER >= 23 926 927_LIBCPP_DIAGNOSTIC_POP 928 929 // [tuple.assign] 930 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 931 tuple& operator=(_If<_And<is_copy_assignable<_Tp>...>::value, tuple, __nat> const& __tuple) 932 _NOEXCEPT_((_And<is_nothrow_copy_assignable<_Tp>...>::value)) 933 { 934 std::__memberwise_copy_assign(*this, __tuple, 935 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 936 return *this; 937 } 938 939#if _LIBCPP_STD_VER >= 23 940 _LIBCPP_HIDE_FROM_ABI constexpr 941 const tuple& operator=(tuple const& __tuple) const 942 requires (_And<is_copy_assignable<const _Tp>...>::value) { 943 std::__memberwise_copy_assign(*this, __tuple, typename __make_tuple_indices<sizeof...(_Tp)>::type()); 944 return *this; 945 } 946 947 _LIBCPP_HIDE_FROM_ABI constexpr 948 const tuple& operator=(tuple&& __tuple) const 949 requires (_And<is_assignable<const _Tp&, _Tp>...>::value) { 950 std::__memberwise_forward_assign(*this, 951 std::move(__tuple), 952 __tuple_types<_Tp...>(), 953 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 954 return *this; 955 } 956#endif // _LIBCPP_STD_VER >= 23 957 958 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 959 tuple& operator=(_If<_And<is_move_assignable<_Tp>...>::value, tuple, __nat>&& __tuple) 960 _NOEXCEPT_((_And<is_nothrow_move_assignable<_Tp>...>::value)) 961 { 962 std::__memberwise_forward_assign(*this, std::move(__tuple), 963 __tuple_types<_Tp...>(), 964 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 965 return *this; 966 } 967 968 template<class... _Up, __enable_if_t< 969 _And< 970 _BoolConstant<sizeof...(_Tp) == sizeof...(_Up)>, 971 is_assignable<_Tp&, _Up const&>... 972 >::value 973 ,int> = 0> 974 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 975 tuple& operator=(tuple<_Up...> const& __tuple) 976 _NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up const&>...>::value)) 977 { 978 std::__memberwise_copy_assign(*this, __tuple, 979 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 980 return *this; 981 } 982 983 template<class... _Up, __enable_if_t< 984 _And< 985 _BoolConstant<sizeof...(_Tp) == sizeof...(_Up)>, 986 is_assignable<_Tp&, _Up>... 987 >::value 988 ,int> = 0> 989 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 990 tuple& operator=(tuple<_Up...>&& __tuple) 991 _NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up>...>::value)) 992 { 993 std::__memberwise_forward_assign(*this, std::move(__tuple), 994 __tuple_types<_Up...>(), 995 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 996 return *this; 997 } 998 999 1000#if _LIBCPP_STD_VER >= 23 1001 template <class... _UTypes, enable_if_t< 1002 _And<_BoolConstant<sizeof...(_Tp) == sizeof...(_UTypes)>, 1003 is_assignable<const _Tp&, const _UTypes&>...>::value>* = nullptr> 1004 _LIBCPP_HIDE_FROM_ABI constexpr 1005 const tuple& operator=(const tuple<_UTypes...>& __u) const { 1006 std::__memberwise_copy_assign(*this, 1007 __u, 1008 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 1009 return *this; 1010 } 1011 1012 template <class... _UTypes, enable_if_t< 1013 _And<_BoolConstant<sizeof...(_Tp) == sizeof...(_UTypes)>, 1014 is_assignable<const _Tp&, _UTypes>...>::value>* = nullptr> 1015 _LIBCPP_HIDE_FROM_ABI constexpr 1016 const tuple& operator=(tuple<_UTypes...>&& __u) const { 1017 std::__memberwise_forward_assign(*this, 1018 __u, 1019 __tuple_types<_UTypes...>(), 1020 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 1021 return *this; 1022 } 1023#endif // _LIBCPP_STD_VER >= 23 1024 1025 template <template<class...> class _Pred, bool _Const, 1026 class _Pair, class _DecayedPair = __remove_cvref_t<_Pair>, class _Tuple = tuple> 1027 struct _AssignPredicateFromPair : false_type {}; 1028 1029 template <template<class...> class _Pred, bool _Const, 1030 class _Pair, class _Up1, class _Up2, class _Tp1, class _Tp2> 1031 struct _AssignPredicateFromPair<_Pred, _Const, _Pair, pair<_Up1, _Up2>, tuple<_Tp1, _Tp2> > : 1032 _And<_Pred<__maybe_const<_Const, _Tp1>&, __copy_cvref_t<_Pair, _Up1> >, 1033 _Pred<__maybe_const<_Const, _Tp2>&, __copy_cvref_t<_Pair, _Up2> > 1034 > {}; 1035 1036 template <bool _Const, class _Pair> 1037 struct _EnableAssignFromPair : _AssignPredicateFromPair<is_assignable, _Const, _Pair> {}; 1038 1039 template <bool _Const, class _Pair> 1040 struct _NothrowAssignFromPair : _AssignPredicateFromPair<is_nothrow_assignable, _Const, _Pair> {}; 1041 1042#if _LIBCPP_STD_VER >= 23 1043 template <class _U1, class _U2, enable_if_t< 1044 _EnableAssignFromPair<true, const pair<_U1, _U2>&>::value>* = nullptr> 1045 _LIBCPP_HIDE_FROM_ABI constexpr 1046 const tuple& operator=(const pair<_U1, _U2>& __pair) const 1047 noexcept(_NothrowAssignFromPair<true, const pair<_U1, _U2>&>::value) { 1048 std::get<0>(*this) = __pair.first; 1049 std::get<1>(*this) = __pair.second; 1050 return *this; 1051 } 1052 1053 template <class _U1, class _U2, enable_if_t< 1054 _EnableAssignFromPair<true, pair<_U1, _U2>&&>::value>* = nullptr> 1055 _LIBCPP_HIDE_FROM_ABI constexpr 1056 const tuple& operator=(pair<_U1, _U2>&& __pair) const 1057 noexcept(_NothrowAssignFromPair<true, pair<_U1, _U2>&&>::value) { 1058 std::get<0>(*this) = std::move(__pair.first); 1059 std::get<1>(*this) = std::move(__pair.second); 1060 return *this; 1061 } 1062#endif // _LIBCPP_STD_VER >= 23 1063 1064 template<class _Up1, class _Up2, __enable_if_t< 1065 _EnableAssignFromPair<false, pair<_Up1, _Up2> const&>::value 1066 ,int> = 0> 1067 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1068 tuple& operator=(pair<_Up1, _Up2> const& __pair) 1069 _NOEXCEPT_((_NothrowAssignFromPair<false, pair<_Up1, _Up2> const&>::value)) 1070 { 1071 std::get<0>(*this) = __pair.first; 1072 std::get<1>(*this) = __pair.second; 1073 return *this; 1074 } 1075 1076 template<class _Up1, class _Up2, __enable_if_t< 1077 _EnableAssignFromPair<false, pair<_Up1, _Up2>&&>::value 1078 ,int> = 0> 1079 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1080 tuple& operator=(pair<_Up1, _Up2>&& __pair) 1081 _NOEXCEPT_((_NothrowAssignFromPair<false, pair<_Up1, _Up2>&&>::value)) 1082 { 1083 std::get<0>(*this) = std::forward<_Up1>(__pair.first); 1084 std::get<1>(*this) = std::forward<_Up2>(__pair.second); 1085 return *this; 1086 } 1087 1088 // EXTENSION 1089 template<class _Up, size_t _Np, class = __enable_if_t< 1090 _And< 1091 _BoolConstant<_Np == sizeof...(_Tp)>, 1092 is_assignable<_Tp&, _Up const&>... 1093 >::value 1094 > > 1095 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1096 tuple& operator=(array<_Up, _Np> const& __array) 1097 _NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up const&>...>::value)) 1098 { 1099 std::__memberwise_copy_assign(*this, __array, 1100 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 1101 return *this; 1102 } 1103 1104 // EXTENSION 1105 template<class _Up, size_t _Np, class = void, class = __enable_if_t< 1106 _And< 1107 _BoolConstant<_Np == sizeof...(_Tp)>, 1108 is_assignable<_Tp&, _Up>... 1109 >::value 1110 > > 1111 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1112 tuple& operator=(array<_Up, _Np>&& __array) 1113 _NOEXCEPT_((_And<is_nothrow_assignable<_Tp&, _Up>...>::value)) 1114 { 1115 std::__memberwise_forward_assign(*this, std::move(__array), 1116 __tuple_types<_If<true, _Up, _Tp>...>(), 1117 typename __make_tuple_indices<sizeof...(_Tp)>::type()); 1118 return *this; 1119 } 1120 1121 // [tuple.swap] 1122 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1123 void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 1124 {__base_.swap(__t.__base_);} 1125 1126#if _LIBCPP_STD_VER >= 23 1127 _LIBCPP_HIDE_FROM_ABI constexpr 1128 void swap(const tuple& __t) const noexcept(__all<is_nothrow_swappable_v<const _Tp&>...>::value) { 1129 __base_.swap(__t.__base_); 1130 } 1131#endif // _LIBCPP_STD_VER >= 23 1132}; 1133 1134template <> 1135class _LIBCPP_TEMPLATE_VIS tuple<> 1136{ 1137public: 1138 constexpr tuple() _NOEXCEPT = default; 1139 template <class _Alloc> 1140 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1141 tuple(allocator_arg_t, const _Alloc&) _NOEXCEPT {} 1142 template <class _Alloc> 1143 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1144 tuple(allocator_arg_t, const _Alloc&, const tuple&) _NOEXCEPT {} 1145 template <class _Up> 1146 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1147 tuple(array<_Up, 0>) _NOEXCEPT {} 1148 template <class _Alloc, class _Up> 1149 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1150 tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {} 1151 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1152 void swap(tuple&) _NOEXCEPT {} 1153#if _LIBCPP_STD_VER >= 23 1154 _LIBCPP_HIDE_FROM_ABI constexpr void swap(const tuple&) const noexcept {} 1155#endif 1156}; 1157 1158#if _LIBCPP_STD_VER >= 23 1159template <class... _TTypes, class... _UTypes, template<class> class _TQual, template<class> class _UQual> 1160 requires requires { typename tuple<common_reference_t<_TQual<_TTypes>, _UQual<_UTypes>>...>; } 1161struct basic_common_reference<tuple<_TTypes...>, tuple<_UTypes...>, _TQual, _UQual> { 1162 using type = tuple<common_reference_t<_TQual<_TTypes>, _UQual<_UTypes>>...>; 1163}; 1164 1165template <class... _TTypes, class... _UTypes> 1166 requires requires { typename tuple<common_type_t<_TTypes, _UTypes>...>; } 1167struct common_type<tuple<_TTypes...>, tuple<_UTypes...>> { 1168 using type = tuple<common_type_t<_TTypes, _UTypes>...>; 1169}; 1170#endif // _LIBCPP_STD_VER >= 23 1171 1172#if _LIBCPP_STD_VER >= 17 1173template <class ..._Tp> 1174tuple(_Tp...) -> tuple<_Tp...>; 1175template <class _Tp1, class _Tp2> 1176tuple(pair<_Tp1, _Tp2>) -> tuple<_Tp1, _Tp2>; 1177template <class _Alloc, class ..._Tp> 1178tuple(allocator_arg_t, _Alloc, _Tp...) -> tuple<_Tp...>; 1179template <class _Alloc, class _Tp1, class _Tp2> 1180tuple(allocator_arg_t, _Alloc, pair<_Tp1, _Tp2>) -> tuple<_Tp1, _Tp2>; 1181template <class _Alloc, class ..._Tp> 1182tuple(allocator_arg_t, _Alloc, tuple<_Tp...>) -> tuple<_Tp...>; 1183#endif 1184 1185template <class ..._Tp, __enable_if_t<__all<__is_swappable<_Tp>::value...>::value, int> = 0> 1186inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1187void 1188swap(tuple<_Tp...>& __t, tuple<_Tp...>& __u) 1189 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value) 1190 {__t.swap(__u);} 1191 1192#if _LIBCPP_STD_VER >= 23 1193template <class... _Tp> 1194_LIBCPP_HIDE_FROM_ABI constexpr 1195enable_if_t<__all<is_swappable_v<const _Tp>...>::value, void> 1196swap(const tuple<_Tp...>& __lhs, const tuple<_Tp...>& __rhs) 1197 noexcept(__all<is_nothrow_swappable_v<const _Tp>...>::value) { 1198 __lhs.swap(__rhs); 1199} 1200#endif 1201 1202// get 1203 1204template <size_t _Ip, class ..._Tp> 1205inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1206typename tuple_element<_Ip, tuple<_Tp...> >::type& 1207get(tuple<_Tp...>& __t) _NOEXCEPT 1208{ 1209 typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type; 1210 return static_cast<__tuple_leaf<_Ip, type>&>(__t.__base_).get(); 1211} 1212 1213template <size_t _Ip, class ..._Tp> 1214inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1215const typename tuple_element<_Ip, tuple<_Tp...> >::type& 1216get(const tuple<_Tp...>& __t) _NOEXCEPT 1217{ 1218 typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type; 1219 return static_cast<const __tuple_leaf<_Ip, type>&>(__t.__base_).get(); 1220} 1221 1222template <size_t _Ip, class ..._Tp> 1223inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1224typename tuple_element<_Ip, tuple<_Tp...> >::type&& 1225get(tuple<_Tp...>&& __t) _NOEXCEPT 1226{ 1227 typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type; 1228 return static_cast<type&&>( 1229 static_cast<__tuple_leaf<_Ip, type>&&>(__t.__base_).get()); 1230} 1231 1232template <size_t _Ip, class ..._Tp> 1233inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1234const typename tuple_element<_Ip, tuple<_Tp...> >::type&& 1235get(const tuple<_Tp...>&& __t) _NOEXCEPT 1236{ 1237 typedef _LIBCPP_NODEBUG typename tuple_element<_Ip, tuple<_Tp...> >::type type; 1238 return static_cast<const type&&>( 1239 static_cast<const __tuple_leaf<_Ip, type>&&>(__t.__base_).get()); 1240} 1241 1242#if _LIBCPP_STD_VER >= 14 1243 1244namespace __find_detail { 1245 1246static constexpr size_t __not_found = static_cast<size_t>(-1); 1247static constexpr size_t __ambiguous = __not_found - 1; 1248 1249inline _LIBCPP_HIDE_FROM_ABI 1250constexpr size_t __find_idx_return(size_t __curr_i, size_t __res, bool __matches) { 1251 return !__matches ? __res : 1252 (__res == __not_found ? __curr_i : __ambiguous); 1253} 1254 1255template <size_t _Nx> 1256inline _LIBCPP_HIDE_FROM_ABI 1257constexpr size_t __find_idx(size_t __i, const bool (&__matches)[_Nx]) { 1258 return __i == _Nx ? __not_found : 1259 __find_detail::__find_idx_return(__i, __find_detail::__find_idx(__i + 1, __matches), __matches[__i]); 1260} 1261 1262template <class _T1, class ..._Args> 1263struct __find_exactly_one_checked { 1264 static constexpr bool __matches[sizeof...(_Args)] = {is_same<_T1, _Args>::value...}; 1265 static constexpr size_t value = __find_detail::__find_idx(0, __matches); 1266 static_assert(value != __not_found, "type not found in type list" ); 1267 static_assert(value != __ambiguous, "type occurs more than once in type list"); 1268}; 1269 1270template <class _T1> 1271struct __find_exactly_one_checked<_T1> { 1272 static_assert(!is_same<_T1, _T1>::value, "type not in empty type list"); 1273}; 1274 1275} // namespace __find_detail 1276 1277template <typename _T1, typename... _Args> 1278struct __find_exactly_one_t 1279 : public __find_detail::__find_exactly_one_checked<_T1, _Args...> { 1280}; 1281 1282template <class _T1, class... _Args> 1283inline _LIBCPP_HIDE_FROM_ABI 1284constexpr _T1& get(tuple<_Args...>& __tup) noexcept 1285{ 1286 return std::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup); 1287} 1288 1289template <class _T1, class... _Args> 1290inline _LIBCPP_HIDE_FROM_ABI 1291constexpr _T1 const& get(tuple<_Args...> const& __tup) noexcept 1292{ 1293 return std::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup); 1294} 1295 1296template <class _T1, class... _Args> 1297inline _LIBCPP_HIDE_FROM_ABI 1298constexpr _T1&& get(tuple<_Args...>&& __tup) noexcept 1299{ 1300 return std::get<__find_exactly_one_t<_T1, _Args...>::value>(std::move(__tup)); 1301} 1302 1303template <class _T1, class... _Args> 1304inline _LIBCPP_HIDE_FROM_ABI 1305constexpr _T1 const&& get(tuple<_Args...> const&& __tup) noexcept 1306{ 1307 return std::get<__find_exactly_one_t<_T1, _Args...>::value>(std::move(__tup)); 1308} 1309 1310#endif 1311 1312// tie 1313 1314template <class ..._Tp> 1315inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1316tuple<_Tp&...> 1317tie(_Tp&... __t) _NOEXCEPT 1318{ 1319 return tuple<_Tp&...>(__t...); 1320} 1321 1322template <class _Up> 1323struct __ignore_t 1324{ 1325 template <class _Tp> 1326 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1327 const __ignore_t& operator=(_Tp&&) const {return *this;} 1328}; 1329 1330# if _LIBCPP_STD_VER >= 17 1331inline constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); 1332# else 1333namespace { 1334 constexpr __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); 1335} // namespace 1336# endif 1337 1338template <class... _Tp> 1339inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1340tuple<typename __unwrap_ref_decay<_Tp>::type...> 1341make_tuple(_Tp&&... __t) 1342{ 1343 return tuple<typename __unwrap_ref_decay<_Tp>::type...>(std::forward<_Tp>(__t)...); 1344} 1345 1346template <class... _Tp> 1347inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1348tuple<_Tp&&...> 1349forward_as_tuple(_Tp&&... __t) _NOEXCEPT 1350{ 1351 return tuple<_Tp&&...>(std::forward<_Tp>(__t)...); 1352} 1353 1354template <size_t _Ip> 1355struct __tuple_equal 1356{ 1357 template <class _Tp, class _Up> 1358 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1359 bool operator()(const _Tp& __x, const _Up& __y) 1360 { 1361 return __tuple_equal<_Ip - 1>()(__x, __y) && std::get<_Ip-1>(__x) == std::get<_Ip-1>(__y); 1362 } 1363}; 1364 1365template <> 1366struct __tuple_equal<0> 1367{ 1368 template <class _Tp, class _Up> 1369 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1370 bool operator()(const _Tp&, const _Up&) 1371 { 1372 return true; 1373 } 1374}; 1375 1376template <class ..._Tp, class ..._Up> 1377inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1378bool 1379operator==(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1380{ 1381 static_assert (sizeof...(_Tp) == sizeof...(_Up), "Can't compare tuples of different sizes"); 1382 return __tuple_equal<sizeof...(_Tp)>()(__x, __y); 1383} 1384 1385#if _LIBCPP_STD_VER >= 20 1386 1387// operator<=> 1388 1389template <class ..._Tp, class ..._Up, size_t ..._Is> 1390_LIBCPP_HIDE_FROM_ABI constexpr 1391auto 1392__tuple_compare_three_way(const tuple<_Tp...>& __x, const tuple<_Up...>& __y, index_sequence<_Is...>) { 1393 common_comparison_category_t<__synth_three_way_result<_Tp, _Up>...> __result = strong_ordering::equal; 1394 static_cast<void>(((__result = std::__synth_three_way(std::get<_Is>(__x), std::get<_Is>(__y)), __result != 0) || ...)); 1395 return __result; 1396} 1397 1398template <class ..._Tp, class ..._Up> 1399requires (sizeof...(_Tp) == sizeof...(_Up)) 1400_LIBCPP_HIDE_FROM_ABI constexpr 1401common_comparison_category_t<__synth_three_way_result<_Tp, _Up>...> 1402operator<=>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1403{ 1404 return std::__tuple_compare_three_way(__x, __y, index_sequence_for<_Tp...>{}); 1405} 1406 1407#else // _LIBCPP_STD_VER >= 20 1408 1409template <class ..._Tp, class ..._Up> 1410inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1411bool 1412operator!=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1413{ 1414 return !(__x == __y); 1415} 1416 1417template <size_t _Ip> 1418struct __tuple_less 1419{ 1420 template <class _Tp, class _Up> 1421 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1422 bool operator()(const _Tp& __x, const _Up& __y) 1423 { 1424 const size_t __idx = tuple_size<_Tp>::value - _Ip; 1425 if (std::get<__idx>(__x) < std::get<__idx>(__y)) 1426 return true; 1427 if (std::get<__idx>(__y) < std::get<__idx>(__x)) 1428 return false; 1429 return __tuple_less<_Ip-1>()(__x, __y); 1430 } 1431}; 1432 1433template <> 1434struct __tuple_less<0> 1435{ 1436 template <class _Tp, class _Up> 1437 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1438 bool operator()(const _Tp&, const _Up&) 1439 { 1440 return false; 1441 } 1442}; 1443 1444template <class ..._Tp, class ..._Up> 1445inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1446bool 1447operator<(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1448{ 1449 static_assert (sizeof...(_Tp) == sizeof...(_Up), "Can't compare tuples of different sizes"); 1450 return __tuple_less<sizeof...(_Tp)>()(__x, __y); 1451} 1452 1453template <class ..._Tp, class ..._Up> 1454inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1455bool 1456operator>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1457{ 1458 return __y < __x; 1459} 1460 1461template <class ..._Tp, class ..._Up> 1462inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1463bool 1464operator>=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1465{ 1466 return !(__x < __y); 1467} 1468 1469template <class ..._Tp, class ..._Up> 1470inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1471bool 1472operator<=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y) 1473{ 1474 return !(__y < __x); 1475} 1476 1477#endif // _LIBCPP_STD_VER >= 20 1478 1479// tuple_cat 1480 1481template <class _Tp, class _Up> struct __tuple_cat_type; 1482 1483template <class ..._Ttypes, class ..._Utypes> 1484struct __tuple_cat_type<tuple<_Ttypes...>, __tuple_types<_Utypes...> > 1485{ 1486 typedef _LIBCPP_NODEBUG tuple<_Ttypes..., _Utypes...> type; 1487}; 1488 1489template <class _ResultTuple, bool _Is_Tuple0TupleLike, class ..._Tuples> 1490struct __tuple_cat_return_1 1491{ 1492}; 1493 1494template <class ..._Types, class _Tuple0> 1495struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0> 1496{ 1497 using type _LIBCPP_NODEBUG = typename __tuple_cat_type< 1498 tuple<_Types...>, 1499 typename __make_tuple_types<__remove_cvref_t<_Tuple0> >::type 1500 >::type; 1501}; 1502 1503template <class ..._Types, class _Tuple0, class _Tuple1, class ..._Tuples> 1504struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0, _Tuple1, _Tuples...> 1505 : public __tuple_cat_return_1< 1506 typename __tuple_cat_type< 1507 tuple<_Types...>, 1508 typename __make_tuple_types<__remove_cvref_t<_Tuple0> >::type 1509 >::type, 1510 __tuple_like_ext<__libcpp_remove_reference_t<_Tuple1> >::value, 1511 _Tuple1, _Tuples...> 1512{ 1513}; 1514 1515template <class ..._Tuples> struct __tuple_cat_return; 1516 1517template <class _Tuple0, class ..._Tuples> 1518struct __tuple_cat_return<_Tuple0, _Tuples...> 1519 : public __tuple_cat_return_1<tuple<>, 1520 __tuple_like_ext<__libcpp_remove_reference_t<_Tuple0> >::value, _Tuple0, 1521 _Tuples...> 1522{ 1523}; 1524 1525template <> 1526struct __tuple_cat_return<> 1527{ 1528 typedef _LIBCPP_NODEBUG tuple<> type; 1529}; 1530 1531inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1532tuple<> 1533tuple_cat() 1534{ 1535 return tuple<>(); 1536} 1537 1538template <class _Rp, class _Indices, class _Tuple0, class ..._Tuples> 1539struct __tuple_cat_return_ref_imp; 1540 1541template <class ..._Types, size_t ..._I0, class _Tuple0> 1542struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, _Tuple0> 1543{ 1544 typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tuple0> _T0; 1545 typedef tuple<_Types..., __apply_cv_t<_Tuple0, typename tuple_element<_I0, _T0>::type>&&...> type; 1546}; 1547 1548template <class ..._Types, size_t ..._I0, class _Tuple0, class _Tuple1, class ..._Tuples> 1549struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, 1550 _Tuple0, _Tuple1, _Tuples...> 1551 : public __tuple_cat_return_ref_imp< 1552 tuple<_Types..., __apply_cv_t<_Tuple0, 1553 typename tuple_element<_I0, __libcpp_remove_reference_t<_Tuple0>>::type>&&...>, 1554 typename __make_tuple_indices<tuple_size<__libcpp_remove_reference_t<_Tuple1> >::value>::type, 1555 _Tuple1, _Tuples...> 1556{ 1557}; 1558 1559template <class _Tuple0, class ..._Tuples> 1560struct __tuple_cat_return_ref 1561 : public __tuple_cat_return_ref_imp<tuple<>, 1562 typename __make_tuple_indices< 1563 tuple_size<__libcpp_remove_reference_t<_Tuple0> >::value 1564 >::type, _Tuple0, _Tuples...> 1565{ 1566}; 1567 1568template <class _Types, class _I0, class _J0> 1569struct __tuple_cat; 1570 1571template <class ..._Types, size_t ..._I0, size_t ..._J0> 1572struct __tuple_cat<tuple<_Types...>, __tuple_indices<_I0...>, __tuple_indices<_J0...> > 1573{ 1574 template <class _Tuple0> 1575 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1576 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&>::type 1577 operator()(tuple<_Types...> __t, _Tuple0&& __t0) 1578 { 1579 (void)__t; // avoid unused parameter warning on GCC when _I0 is empty 1580 return std::forward_as_tuple( 1581 std::forward<_Types>(std::get<_I0>(__t))..., 1582 std::get<_J0>(std::forward<_Tuple0>(__t0))...); 1583 } 1584 1585 template <class _Tuple0, class _Tuple1, class ..._Tuples> 1586 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1587 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&, _Tuple1&&, _Tuples&&...>::type 1588 operator()(tuple<_Types...> __t, _Tuple0&& __t0, _Tuple1&& __t1, _Tuples&& ...__tpls) 1589 { 1590 (void)__t; // avoid unused parameter warning on GCC when _I0 is empty 1591 typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tuple0> _T0; 1592 typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tuple1> _T1; 1593 return __tuple_cat<tuple<_Types..., __apply_cv_t<_Tuple0, typename tuple_element<_J0, _T0>::type>&&...>, 1594 typename __make_tuple_indices<sizeof...(_Types) + tuple_size<_T0>::value>::type, 1595 typename __make_tuple_indices<tuple_size<_T1>::value>::type>()( 1596 std::forward_as_tuple( 1597 std::forward<_Types>(std::get<_I0>(__t))..., 1598 std::get<_J0>(std::forward<_Tuple0>(__t0))...), 1599 std::forward<_Tuple1>(__t1), std::forward<_Tuples>(__tpls)...); 1600 } 1601}; 1602 1603template <class _Tuple0, class... _Tuples> 1604inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 1605typename __tuple_cat_return<_Tuple0, _Tuples...>::type 1606tuple_cat(_Tuple0&& __t0, _Tuples&&... __tpls) 1607{ 1608 typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tuple0> _T0; 1609 return __tuple_cat<tuple<>, __tuple_indices<>, 1610 typename __make_tuple_indices<tuple_size<_T0>::value>::type>() 1611 (tuple<>(), std::forward<_Tuple0>(__t0), 1612 std::forward<_Tuples>(__tpls)...); 1613} 1614 1615template <class ..._Tp, class _Alloc> 1616struct _LIBCPP_TEMPLATE_VIS uses_allocator<tuple<_Tp...>, _Alloc> 1617 : true_type {}; 1618 1619template <class _T1, class _T2> 1620template <class... _Args1, class... _Args2, size_t ..._I1, size_t ..._I2> 1621inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 1622pair<_T1, _T2>::pair(piecewise_construct_t, 1623 tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args, 1624 __tuple_indices<_I1...>, __tuple_indices<_I2...>) 1625 : first(std::forward<_Args1>(std::get<_I1>( __first_args))...), 1626 second(std::forward<_Args2>(std::get<_I2>(__second_args))...) 1627{ 1628} 1629 1630#if _LIBCPP_STD_VER >= 17 1631template <class _Tp> 1632inline constexpr size_t tuple_size_v = tuple_size<_Tp>::value; 1633 1634#define _LIBCPP_NOEXCEPT_RETURN(...) noexcept(noexcept(__VA_ARGS__)) { return __VA_ARGS__; } 1635 1636template <class _Fn, class _Tuple, size_t ..._Id> 1637inline _LIBCPP_HIDE_FROM_ABI 1638constexpr decltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t, 1639 __tuple_indices<_Id...>) 1640_LIBCPP_NOEXCEPT_RETURN( 1641 std::__invoke( 1642 std::forward<_Fn>(__f), 1643 std::get<_Id>(std::forward<_Tuple>(__t))...) 1644) 1645 1646template <class _Fn, class _Tuple> 1647inline _LIBCPP_HIDE_FROM_ABI 1648constexpr decltype(auto) apply(_Fn && __f, _Tuple && __t) 1649_LIBCPP_NOEXCEPT_RETURN( 1650 std::__apply_tuple_impl( 1651 std::forward<_Fn>(__f), std::forward<_Tuple>(__t), 1652 typename __make_tuple_indices<tuple_size_v<remove_reference_t<_Tuple>>>::type{}) 1653) 1654 1655template <class _Tp, class _Tuple, size_t... _Idx> 1656inline _LIBCPP_HIDE_FROM_ABI 1657constexpr _Tp __make_from_tuple_impl(_Tuple&& __t, __tuple_indices<_Idx...>) 1658_LIBCPP_NOEXCEPT_RETURN( 1659 _Tp(std::get<_Idx>(std::forward<_Tuple>(__t))...) 1660) 1661 1662template <class _Tp, class _Tuple> 1663inline _LIBCPP_HIDE_FROM_ABI 1664constexpr _Tp make_from_tuple(_Tuple&& __t) 1665_LIBCPP_NOEXCEPT_RETURN( 1666 std::__make_from_tuple_impl<_Tp>(std::forward<_Tuple>(__t), 1667 typename __make_tuple_indices<tuple_size_v<remove_reference_t<_Tuple>>>::type{}) 1668) 1669 1670#undef _LIBCPP_NOEXCEPT_RETURN 1671 1672#endif // _LIBCPP_STD_VER >= 17 1673 1674#endif // !defined(_LIBCPP_CXX03_LANG) 1675 1676_LIBCPP_END_NAMESPACE_STD 1677 1678_LIBCPP_POP_MACROS 1679 1680#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 1681# include <exception> 1682# include <iosfwd> 1683# include <new> 1684# include <type_traits> 1685# include <typeinfo> 1686# include <utility> 1687#endif 1688 1689#endif // _LIBCPP_TUPLE 1690