2 //===--------------------------- tuple ------------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is distributed under the University of Illinois Open Source
7 // License. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
24 explicit tuple(const T&...); // constexpr in C++14
26 explicit tuple(U&&...); // constexpr in C++14
27 tuple(const tuple&) = default;
28 tuple(tuple&&) = default;
30 tuple(const tuple<U...>&); // constexpr in C++14
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
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>&&);
58 tuple& operator=(const tuple&);
60 operator=(tuple&&) noexcept(AND(is_nothrow_move_assignable<T>::value ...));
62 tuple& operator=(const tuple<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
70 void swap(tuple&) noexcept(AND(swap(declval<T&>(), declval<T&>())...));
73 const unspecified ignore;
75 template <class... T> tuple<V...> make_tuple(T&&...); // constexpr in C++14
76 template <class... T> tuple<ATypes...> forward_as_tuple(T&&...) noexcept; // constexpr in C++14
77 template <class... T> tuple<T&...> tie(T&...) noexcept; // constexpr in C++14
78 template <class... Tuples> tuple<CTypes...> tuple_cat(Tuples&&... tpls); // constexpr in C++14
80 // [tuple.apply], calling a function with a tuple of arguments:
81 template <class F, class Tuple>
82 constexpr decltype(auto) apply(F&& f, Tuple&& t); // C++17
83 template <class T, class Tuple>
84 constexpr T make_from_tuple(Tuple&& t); // C++17
86 // 20.4.1.4, tuple helper classes:
87 template <class T> class tuple_size; // undefined
88 template <class... T> class tuple_size<tuple<T...>>;
90 constexpr size_t tuple_size_v = tuple_size<T>::value; // C++17
91 template <size_t I, class T> class tuple_element; // undefined
92 template <size_t I, class... T> class tuple_element<I, tuple<T...>>;
93 template <size_t I, class T>
94 using tuple_element_t = typename tuple_element <I, T>::type; // C++14
96 // 20.4.1.5, element access:
97 template <size_t I, class... T>
98 typename tuple_element<I, tuple<T...>>::type&
99 get(tuple<T...>&) noexcept; // constexpr in C++14
100 template <size_t I, class... T>
101 const typename tuple_element<I, tuple<T...>>::type&
102 get(const tuple<T...>&) noexcept; // constexpr in C++14
103 template <size_t I, class... T>
104 typename tuple_element<I, tuple<T...>>::type&&
105 get(tuple<T...>&&) noexcept; // constexpr in C++14
106 template <size_t I, class... T>
107 const typename tuple_element<I, tuple<T...>>::type&&
108 get(const tuple<T...>&&) noexcept; // constexpr in C++14
110 template <class T1, class... T>
111 constexpr T1& get(tuple<T...>&) noexcept; // C++14
112 template <class T1, class... T>
113 constexpr const T1& get(const tuple<T...>&) noexcept; // C++14
114 template <class T1, class... T>
115 constexpr T1&& get(tuple<T...>&&) noexcept; // C++14
116 template <class T1, class... T>
117 constexpr const T1&& get(const tuple<T...>&&) noexcept; // C++14
119 // 20.4.1.6, relational operators:
120 template<class... T, class... U> bool operator==(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
121 template<class... T, class... U> bool operator<(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
122 template<class... T, class... U> bool operator!=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
123 template<class... T, class... U> bool operator>(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
124 template<class... T, class... U> bool operator<=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
125 template<class... T, class... U> bool operator>=(const tuple<T...>&, const tuple<U...>&); // constexpr in C++14
127 template <class... Types, class Alloc>
128 struct uses_allocator<tuple<Types...>, Alloc>;
130 template <class... Types>
132 swap(tuple<Types...>& x, tuple<Types...>& y) noexcept(noexcept(x.swap(y)));
141 #include <type_traits>
142 #include <__functional_base>
145 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
146 #pragma GCC system_header
149 _LIBCPP_BEGIN_NAMESPACE_STD
151 #ifndef _LIBCPP_HAS_NO_VARIADICS
156 template <size_t _Ip, class _Hp,
157 bool=is_empty<_Hp>::value && !__libcpp_is_final<_Hp>::value
161 template <size_t _Ip, class _Hp, bool _Ep>
162 inline _LIBCPP_INLINE_VISIBILITY
163 void swap(__tuple_leaf<_Ip, _Hp, _Ep>& __x, __tuple_leaf<_Ip, _Hp, _Ep>& __y)
164 _NOEXCEPT_(__is_nothrow_swappable<_Hp>::value)
166 swap(__x.get(), __y.get());
169 template <size_t _Ip, class _Hp, bool>
175 static constexpr bool __can_bind_reference() {
176 using _RawTp = typename remove_reference<_Tp>::type;
177 using _RawHp = typename remove_reference<_Hp>::type;
178 using _CheckLValueArg = integral_constant<bool,
179 is_lvalue_reference<_Tp>::value
180 || is_same<_RawTp, reference_wrapper<_RawHp>>::value
181 || is_same<_RawTp, reference_wrapper<typename remove_const<_RawHp>::type>>::value
183 return !is_reference<_Hp>::value
184 || (is_lvalue_reference<_Hp>::value && _CheckLValueArg::value)
185 || (is_rvalue_reference<_Hp>::value && !is_lvalue_reference<_Tp>::value);
188 __tuple_leaf& operator=(const __tuple_leaf&);
190 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf()
191 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) : value()
192 {static_assert(!is_reference<_Hp>::value,
193 "Attempted to default construct a reference element in a tuple");}
195 template <class _Alloc>
196 _LIBCPP_INLINE_VISIBILITY
197 __tuple_leaf(integral_constant<int, 0>, const _Alloc&)
199 {static_assert(!is_reference<_Hp>::value,
200 "Attempted to default construct a reference element in a tuple");}
202 template <class _Alloc>
203 _LIBCPP_INLINE_VISIBILITY
204 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a)
205 : value(allocator_arg_t(), __a)
206 {static_assert(!is_reference<_Hp>::value,
207 "Attempted to default construct a reference element in a tuple");}
209 template <class _Alloc>
210 _LIBCPP_INLINE_VISIBILITY
211 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a)
213 {static_assert(!is_reference<_Hp>::value,
214 "Attempted to default construct a reference element in a tuple");}
217 class = typename enable_if<
219 __lazy_not<is_same<typename decay<_Tp>::type, __tuple_leaf>>
220 , is_constructible<_Hp, _Tp>
224 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
225 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value))
226 : value(_VSTD::forward<_Tp>(__t))
227 {static_assert(__can_bind_reference<_Tp>(),
228 "Attempted to construct a reference element in a tuple with an rvalue");}
230 template <class _Tp, class _Alloc>
231 _LIBCPP_INLINE_VISIBILITY
232 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t)
233 : value(_VSTD::forward<_Tp>(__t))
234 {static_assert(__can_bind_reference<_Tp>(),
235 "Attempted to construct a reference element in a tuple with an rvalue");}
237 template <class _Tp, class _Alloc>
238 _LIBCPP_INLINE_VISIBILITY
239 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t)
240 : value(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t))
241 {static_assert(!is_reference<_Hp>::value,
242 "Attempted to uses-allocator construct a reference element in a tuple");}
244 template <class _Tp, class _Alloc>
245 _LIBCPP_INLINE_VISIBILITY
246 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t)
247 : value(_VSTD::forward<_Tp>(__t), __a)
248 {static_assert(!is_reference<_Hp>::value,
249 "Attempted to uses-allocator construct a reference element in a tuple");}
251 __tuple_leaf(const __tuple_leaf& __t) = default;
252 __tuple_leaf(__tuple_leaf&& __t) = default;
255 _LIBCPP_INLINE_VISIBILITY
257 operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value))
259 value = _VSTD::forward<_Tp>(__t);
263 _LIBCPP_INLINE_VISIBILITY
264 int swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value)
266 _VSTD::swap(*this, __t);
270 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return value;}
271 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return value;}
274 template <size_t _Ip, class _Hp>
275 class __tuple_leaf<_Ip, _Hp, true>
279 __tuple_leaf& operator=(const __tuple_leaf&);
281 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __tuple_leaf()
282 _NOEXCEPT_(is_nothrow_default_constructible<_Hp>::value) {}
284 template <class _Alloc>
285 _LIBCPP_INLINE_VISIBILITY
286 __tuple_leaf(integral_constant<int, 0>, const _Alloc&) {}
288 template <class _Alloc>
289 _LIBCPP_INLINE_VISIBILITY
290 __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a)
291 : _Hp(allocator_arg_t(), __a) {}
293 template <class _Alloc>
294 _LIBCPP_INLINE_VISIBILITY
295 __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a)
299 class = typename enable_if<
301 __lazy_not<is_same<typename decay<_Tp>::type, __tuple_leaf>>
302 , is_constructible<_Hp, _Tp>
306 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
307 explicit __tuple_leaf(_Tp&& __t) _NOEXCEPT_((is_nothrow_constructible<_Hp, _Tp>::value))
308 : _Hp(_VSTD::forward<_Tp>(__t)) {}
310 template <class _Tp, class _Alloc>
311 _LIBCPP_INLINE_VISIBILITY
312 explicit __tuple_leaf(integral_constant<int, 0>, const _Alloc&, _Tp&& __t)
313 : _Hp(_VSTD::forward<_Tp>(__t)) {}
315 template <class _Tp, class _Alloc>
316 _LIBCPP_INLINE_VISIBILITY
317 explicit __tuple_leaf(integral_constant<int, 1>, const _Alloc& __a, _Tp&& __t)
318 : _Hp(allocator_arg_t(), __a, _VSTD::forward<_Tp>(__t)) {}
320 template <class _Tp, class _Alloc>
321 _LIBCPP_INLINE_VISIBILITY
322 explicit __tuple_leaf(integral_constant<int, 2>, const _Alloc& __a, _Tp&& __t)
323 : _Hp(_VSTD::forward<_Tp>(__t), __a) {}
325 __tuple_leaf(__tuple_leaf const &) = default;
326 __tuple_leaf(__tuple_leaf &&) = default;
329 _LIBCPP_INLINE_VISIBILITY
331 operator=(_Tp&& __t) _NOEXCEPT_((is_nothrow_assignable<_Hp&, _Tp>::value))
333 _Hp::operator=(_VSTD::forward<_Tp>(__t));
337 _LIBCPP_INLINE_VISIBILITY
339 swap(__tuple_leaf& __t) _NOEXCEPT_(__is_nothrow_swappable<__tuple_leaf>::value)
341 _VSTD::swap(*this, __t);
345 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 _Hp& get() _NOEXCEPT {return static_cast<_Hp&>(*this);}
346 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 const _Hp& get() const _NOEXCEPT {return static_cast<const _Hp&>(*this);}
349 template <class ..._Tp>
350 _LIBCPP_INLINE_VISIBILITY
351 void __swallow(_Tp&&...) _NOEXCEPT {}
353 template <class ..._Tp>
354 struct __lazy_all : __all<_Tp::value...> {};
357 struct __all_default_constructible;
359 template <class ..._Tp>
360 struct __all_default_constructible<__tuple_types<_Tp...>>
361 : __all<is_default_constructible<_Tp>::value...>
366 template<class _Indx, class ..._Tp> struct __tuple_impl;
368 template<size_t ..._Indx, class ..._Tp>
369 struct __tuple_impl<__tuple_indices<_Indx...>, _Tp...>
370 : public __tuple_leaf<_Indx, _Tp>...
372 _LIBCPP_INLINE_VISIBILITY
373 _LIBCPP_CONSTEXPR __tuple_impl()
374 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {}
376 template <size_t ..._Uf, class ..._Tf,
377 size_t ..._Ul, class ..._Tl, class ..._Up>
378 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
380 __tuple_impl(__tuple_indices<_Uf...>, __tuple_types<_Tf...>,
381 __tuple_indices<_Ul...>, __tuple_types<_Tl...>,
383 _NOEXCEPT_((__all<is_nothrow_constructible<_Tf, _Up>::value...>::value &&
384 __all<is_nothrow_default_constructible<_Tl>::value...>::value)) :
385 __tuple_leaf<_Uf, _Tf>(_VSTD::forward<_Up>(__u))...,
386 __tuple_leaf<_Ul, _Tl>()...
389 template <class _Alloc, size_t ..._Uf, class ..._Tf,
390 size_t ..._Ul, class ..._Tl, class ..._Up>
391 _LIBCPP_INLINE_VISIBILITY
393 __tuple_impl(allocator_arg_t, const _Alloc& __a,
394 __tuple_indices<_Uf...>, __tuple_types<_Tf...>,
395 __tuple_indices<_Ul...>, __tuple_types<_Tl...>,
397 __tuple_leaf<_Uf, _Tf>(__uses_alloc_ctor<_Tf, _Alloc, _Up>(), __a,
398 _VSTD::forward<_Up>(__u))...,
399 __tuple_leaf<_Ul, _Tl>(__uses_alloc_ctor<_Tl, _Alloc>(), __a)...
402 template <class _Tuple,
403 class = typename enable_if
405 __tuple_constructible<_Tuple, tuple<_Tp...> >::value
408 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
409 __tuple_impl(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_constructible<_Tp, typename tuple_element<_Indx,
410 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value))
411 : __tuple_leaf<_Indx, _Tp>(_VSTD::forward<typename tuple_element<_Indx,
412 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...
415 template <class _Alloc, class _Tuple,
416 class = typename enable_if
418 __tuple_constructible<_Tuple, tuple<_Tp...> >::value
421 _LIBCPP_INLINE_VISIBILITY
422 __tuple_impl(allocator_arg_t, const _Alloc& __a, _Tuple&& __t)
423 : __tuple_leaf<_Indx, _Tp>(__uses_alloc_ctor<_Tp, _Alloc, typename tuple_element<_Indx,
424 typename __make_tuple_types<_Tuple>::type>::type>(), __a,
425 _VSTD::forward<typename tuple_element<_Indx,
426 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...
429 template <class _Tuple>
430 _LIBCPP_INLINE_VISIBILITY
433 __tuple_assignable<_Tuple, tuple<_Tp...> >::value,
436 operator=(_Tuple&& __t) _NOEXCEPT_((__all<is_nothrow_assignable<_Tp&, typename tuple_element<_Indx,
437 typename __make_tuple_types<_Tuple>::type>::type>::value...>::value))
439 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<typename tuple_element<_Indx,
440 typename __make_tuple_types<_Tuple>::type>::type>(_VSTD::get<_Indx>(__t)))...);
444 __tuple_impl(const __tuple_impl&) = default;
445 __tuple_impl(__tuple_impl&&) = default;
447 _LIBCPP_INLINE_VISIBILITY
449 operator=(const __tuple_impl& __t) _NOEXCEPT_((__all<is_nothrow_copy_assignable<_Tp>::value...>::value))
451 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(static_cast<const __tuple_leaf<_Indx, _Tp>&>(__t).get())...);
455 _LIBCPP_INLINE_VISIBILITY
457 operator=(__tuple_impl&& __t) _NOEXCEPT_((__all<is_nothrow_move_assignable<_Tp>::value...>::value))
459 __swallow(__tuple_leaf<_Indx, _Tp>::operator=(_VSTD::forward<_Tp>(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t).get()))...);
463 _LIBCPP_INLINE_VISIBILITY
464 void swap(__tuple_impl& __t)
465 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
467 __swallow(__tuple_leaf<_Indx, _Tp>::swap(static_cast<__tuple_leaf<_Indx, _Tp>&>(__t))...);
473 template <class ..._Tp>
474 class _LIBCPP_TEMPLATE_VIS tuple
476 typedef __tuple_impl<typename __make_tuple_indices<sizeof...(_Tp)>::type, _Tp...> base;
480 #if defined(_LIBCPP_ENABLE_TUPLE_IMPLICIT_REDUCED_ARITY_EXTENSION)
481 static constexpr bool _EnableImplicitReducedArityExtension = true;
483 static constexpr bool _EnableImplicitReducedArityExtension = false;
486 template <class ..._Args>
487 struct _PackExpandsToThisTuple : false_type {};
489 template <class _Arg>
490 struct _PackExpandsToThisTuple<_Arg>
491 : is_same<typename __uncvref<_Arg>::type, tuple> {};
493 template <bool _MaybeEnable, class _Dummy = void>
494 struct _CheckArgsConstructor : __check_tuple_constructor_fail {};
496 template <class _Dummy>
497 struct _CheckArgsConstructor<true, _Dummy>
499 template <class ..._Args>
500 static constexpr bool __enable_default() {
501 return __all<is_default_constructible<_Args>::value...>::value;
504 template <class ..._Args>
505 static constexpr bool __enable_explicit() {
507 __tuple_constructible<
509 typename __make_tuple_types<tuple,
510 sizeof...(_Args) < sizeof...(_Tp) ?
512 sizeof...(_Tp)>::type
514 !__tuple_convertible<
516 typename __make_tuple_types<tuple,
517 sizeof...(_Args) < sizeof...(_Tp) ?
519 sizeof...(_Tp)>::type
521 __all_default_constructible<
522 typename __make_tuple_types<tuple, sizeof...(_Tp),
523 sizeof...(_Args) < sizeof...(_Tp) ?
525 sizeof...(_Tp)>::type
529 template <class ..._Args>
530 static constexpr bool __enable_implicit() {
534 typename __make_tuple_types<tuple,
535 sizeof...(_Args) < sizeof...(_Tp) ?
537 sizeof...(_Tp)>::type
539 __all_default_constructible<
540 typename __make_tuple_types<tuple, sizeof...(_Tp),
541 sizeof...(_Args) < sizeof...(_Tp) ?
543 sizeof...(_Tp)>::type
548 template <bool _MaybeEnable,
549 bool = sizeof...(_Tp) == 1,
551 struct _CheckTupleLikeConstructor : __check_tuple_constructor_fail {};
553 template <class _Dummy>
554 struct _CheckTupleLikeConstructor<true, false, _Dummy>
556 template <class _Tuple>
557 static constexpr bool __enable_implicit() {
558 return __tuple_convertible<_Tuple, tuple>::value;
561 template <class _Tuple>
562 static constexpr bool __enable_explicit() {
563 return __tuple_constructible<_Tuple, tuple>::value
564 && !__tuple_convertible<_Tuple, tuple>::value;
568 template <class _Dummy>
569 struct _CheckTupleLikeConstructor<true, true, _Dummy>
571 // This trait is used to disable the tuple-like constructor when
572 // the UTypes... constructor should be selected instead.
573 // See LWG issue #2549.
574 template <class _Tuple>
575 using _PreferTupleLikeConstructor = __lazy_or<
576 // Don't attempt the two checks below if the tuple we are given
577 // has the same type as this tuple.
578 is_same<typename __uncvref<_Tuple>::type, tuple>,
580 __lazy_not<is_constructible<_Tp..., _Tuple>>,
581 __lazy_not<is_convertible<_Tuple, _Tp...>>
585 template <class _Tuple>
586 static constexpr bool __enable_implicit() {
588 __tuple_convertible<_Tuple, tuple>,
589 _PreferTupleLikeConstructor<_Tuple>
593 template <class _Tuple>
594 static constexpr bool __enable_explicit() {
596 __tuple_constructible<_Tuple, tuple>,
597 _PreferTupleLikeConstructor<_Tuple>,
598 __lazy_not<__tuple_convertible<_Tuple, tuple>>
603 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
604 typename tuple_element<_Jp, tuple<_Up...> >::type& get(tuple<_Up...>&) _NOEXCEPT;
605 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
606 const typename tuple_element<_Jp, tuple<_Up...> >::type& get(const tuple<_Up...>&) _NOEXCEPT;
607 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
608 typename tuple_element<_Jp, tuple<_Up...> >::type&& get(tuple<_Up...>&&) _NOEXCEPT;
609 template <size_t _Jp, class ..._Up> friend _LIBCPP_CONSTEXPR_AFTER_CXX11
610 const typename tuple_element<_Jp, tuple<_Up...> >::type&& get(const tuple<_Up...>&&) _NOEXCEPT;
613 template <bool _Dummy = true, class = typename enable_if<
614 _CheckArgsConstructor<_Dummy>::template __enable_default<_Tp...>()
616 _LIBCPP_INLINE_VISIBILITY
617 _LIBCPP_CONSTEXPR tuple()
618 _NOEXCEPT_(__all<is_nothrow_default_constructible<_Tp>::value...>::value) {}
620 tuple(tuple const&) = default;
621 tuple(tuple&&) = default;
623 template <class _AllocArgT, class _Alloc, bool _Dummy = true, class = typename enable_if<
625 is_same<allocator_arg_t, _AllocArgT>,
626 __lazy_all<__dependent_type<is_default_constructible<_Tp>, _Dummy>...>
629 _LIBCPP_INLINE_VISIBILITY
630 tuple(_AllocArgT, _Alloc const& __a)
631 : base_(allocator_arg_t(), __a,
632 __tuple_indices<>(), __tuple_types<>(),
633 typename __make_tuple_indices<sizeof...(_Tp), 0>::type(),
634 __tuple_types<_Tp...>()) {}
636 template <bool _Dummy = true,
639 _CheckArgsConstructor<
641 >::template __enable_implicit<_Tp const&...>(),
645 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
646 tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::value))
647 : base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(),
648 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
649 typename __make_tuple_indices<0>::type(),
650 typename __make_tuple_types<tuple, 0>::type(),
654 template <bool _Dummy = true,
657 _CheckArgsConstructor<
659 >::template __enable_explicit<_Tp const&...>(),
663 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
664 explicit tuple(const _Tp& ... __t) _NOEXCEPT_((__all<is_nothrow_copy_constructible<_Tp>::value...>::value))
665 : base_(typename __make_tuple_indices<sizeof...(_Tp)>::type(),
666 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
667 typename __make_tuple_indices<0>::type(),
668 typename __make_tuple_types<tuple, 0>::type(),
672 template <class _Alloc, bool _Dummy = true,
675 _CheckArgsConstructor<
677 >::template __enable_implicit<_Tp const&...>(),
681 _LIBCPP_INLINE_VISIBILITY
682 tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
683 : base_(allocator_arg_t(), __a,
684 typename __make_tuple_indices<sizeof...(_Tp)>::type(),
685 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
686 typename __make_tuple_indices<0>::type(),
687 typename __make_tuple_types<tuple, 0>::type(),
691 template <class _Alloc, bool _Dummy = true,
694 _CheckArgsConstructor<
696 >::template __enable_explicit<_Tp const&...>(),
700 _LIBCPP_INLINE_VISIBILITY
702 tuple(allocator_arg_t, const _Alloc& __a, const _Tp& ... __t)
703 : base_(allocator_arg_t(), __a,
704 typename __make_tuple_indices<sizeof...(_Tp)>::type(),
705 typename __make_tuple_types<tuple, sizeof...(_Tp)>::type(),
706 typename __make_tuple_indices<0>::type(),
707 typename __make_tuple_types<tuple, 0>::type(),
711 template <class ..._Up,
712 bool _PackIsTuple = _PackExpandsToThisTuple<_Up...>::value,
715 _CheckArgsConstructor<
716 sizeof...(_Up) == sizeof...(_Tp)
718 >::template __enable_implicit<_Up...>() ||
719 _CheckArgsConstructor<
720 _EnableImplicitReducedArityExtension
721 && sizeof...(_Up) < sizeof...(_Tp)
723 >::template __enable_implicit<_Up...>(),
727 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
730 is_nothrow_constructible<base,
731 typename __make_tuple_indices<sizeof...(_Up)>::type,
732 typename __make_tuple_types<tuple, sizeof...(_Up)>::type,
733 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type,
734 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type,
738 : base_(typename __make_tuple_indices<sizeof...(_Up)>::type(),
739 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
740 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
741 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
742 _VSTD::forward<_Up>(__u)...) {}
744 template <class ..._Up,
747 _CheckArgsConstructor<
748 sizeof...(_Up) <= sizeof...(_Tp)
749 && !_PackExpandsToThisTuple<_Up...>::value
750 >::template __enable_explicit<_Up...>() ||
751 _CheckArgsConstructor<
752 !_EnableImplicitReducedArityExtension
753 && sizeof...(_Up) < sizeof...(_Tp)
754 && !_PackExpandsToThisTuple<_Up...>()
755 >::template __enable_implicit<_Up...>(),
759 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
763 is_nothrow_constructible<base,
764 typename __make_tuple_indices<sizeof...(_Up)>::type,
765 typename __make_tuple_types<tuple, sizeof...(_Up)>::type,
766 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type,
767 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type,
771 : base_(typename __make_tuple_indices<sizeof...(_Up)>::type(),
772 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
773 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
774 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
775 _VSTD::forward<_Up>(__u)...) {}
777 template <class _Alloc, class ..._Up,
780 _CheckArgsConstructor<
781 sizeof...(_Up) == sizeof...(_Tp) &&
782 !_PackExpandsToThisTuple<_Up...>::value
783 >::template __enable_implicit<_Up...>(),
787 _LIBCPP_INLINE_VISIBILITY
788 tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
789 : base_(allocator_arg_t(), __a,
790 typename __make_tuple_indices<sizeof...(_Up)>::type(),
791 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
792 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
793 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
794 _VSTD::forward<_Up>(__u)...) {}
796 template <class _Alloc, class ..._Up,
799 _CheckArgsConstructor<
800 sizeof...(_Up) == sizeof...(_Tp) &&
801 !_PackExpandsToThisTuple<_Up...>::value
802 >::template __enable_explicit<_Up...>(),
806 _LIBCPP_INLINE_VISIBILITY
808 tuple(allocator_arg_t, const _Alloc& __a, _Up&&... __u)
809 : base_(allocator_arg_t(), __a,
810 typename __make_tuple_indices<sizeof...(_Up)>::type(),
811 typename __make_tuple_types<tuple, sizeof...(_Up)>::type(),
812 typename __make_tuple_indices<sizeof...(_Tp), sizeof...(_Up)>::type(),
813 typename __make_tuple_types<tuple, sizeof...(_Tp), sizeof...(_Up)>::type(),
814 _VSTD::forward<_Up>(__u)...) {}
816 template <class _Tuple,
819 _CheckTupleLikeConstructor<
820 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value
821 && !_PackExpandsToThisTuple<_Tuple>::value
822 >::template __enable_implicit<_Tuple>(),
826 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
827 tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value))
828 : base_(_VSTD::forward<_Tuple>(__t)) {}
830 template <class _Tuple,
833 _CheckTupleLikeConstructor<
834 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value
835 && !_PackExpandsToThisTuple<_Tuple>::value
836 >::template __enable_explicit<_Tuple>(),
840 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
842 tuple(_Tuple&& __t) _NOEXCEPT_((is_nothrow_constructible<base, _Tuple>::value))
843 : base_(_VSTD::forward<_Tuple>(__t)) {}
845 template <class _Alloc, class _Tuple,
848 _CheckTupleLikeConstructor<
849 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value
850 >::template __enable_implicit<_Tuple>(),
854 _LIBCPP_INLINE_VISIBILITY
855 tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t)
856 : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {}
858 template <class _Alloc, class _Tuple,
861 _CheckTupleLikeConstructor<
862 __tuple_like_with_size<_Tuple, sizeof...(_Tp)>::value
863 >::template __enable_explicit<_Tuple>(),
867 _LIBCPP_INLINE_VISIBILITY
869 tuple(allocator_arg_t, const _Alloc& __a, _Tuple&& __t)
870 : base_(allocator_arg_t(), __a, _VSTD::forward<_Tuple>(__t)) {}
872 using _CanCopyAssign = __all<is_copy_assignable<_Tp>::value...>;
873 using _CanMoveAssign = __all<is_move_assignable<_Tp>::value...>;
875 _LIBCPP_INLINE_VISIBILITY
876 tuple& operator=(typename conditional<_CanCopyAssign::value, tuple, __nat>::type const& __t)
877 _NOEXCEPT_((__all<is_nothrow_copy_assignable<_Tp>::value...>::value))
879 base_.operator=(__t.base_);
883 _LIBCPP_INLINE_VISIBILITY
884 tuple& operator=(typename conditional<_CanMoveAssign::value, tuple, __nat>::type&& __t)
885 _NOEXCEPT_((__all<is_nothrow_move_assignable<_Tp>::value...>::value))
887 base_.operator=(static_cast<base&&>(__t.base_));
891 template <class _Tuple,
892 class = typename enable_if
894 __tuple_assignable<_Tuple, tuple>::value
897 _LIBCPP_INLINE_VISIBILITY
899 operator=(_Tuple&& __t) _NOEXCEPT_((is_nothrow_assignable<base&, _Tuple>::value))
901 base_.operator=(_VSTD::forward<_Tuple>(__t));
905 _LIBCPP_INLINE_VISIBILITY
906 void swap(tuple& __t) _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
907 {base_.swap(__t.base_);}
911 class _LIBCPP_TEMPLATE_VIS tuple<>
914 _LIBCPP_INLINE_VISIBILITY
915 _LIBCPP_CONSTEXPR tuple() _NOEXCEPT {}
916 template <class _Alloc>
917 _LIBCPP_INLINE_VISIBILITY
918 tuple(allocator_arg_t, const _Alloc&) _NOEXCEPT {}
919 template <class _Alloc>
920 _LIBCPP_INLINE_VISIBILITY
921 tuple(allocator_arg_t, const _Alloc&, const tuple&) _NOEXCEPT {}
923 _LIBCPP_INLINE_VISIBILITY
924 tuple(array<_Up, 0>) _NOEXCEPT {}
925 template <class _Alloc, class _Up>
926 _LIBCPP_INLINE_VISIBILITY
927 tuple(allocator_arg_t, const _Alloc&, array<_Up, 0>) _NOEXCEPT {}
928 _LIBCPP_INLINE_VISIBILITY
929 void swap(tuple&) _NOEXCEPT {}
932 template <class ..._Tp>
933 inline _LIBCPP_INLINE_VISIBILITY
936 __all<__is_swappable<_Tp>::value...>::value,
939 swap(tuple<_Tp...>& __t, tuple<_Tp...>& __u)
940 _NOEXCEPT_(__all<__is_nothrow_swappable<_Tp>::value...>::value)
945 template <size_t _Ip, class ..._Tp>
946 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
947 typename tuple_element<_Ip, tuple<_Tp...> >::type&
948 get(tuple<_Tp...>& __t) _NOEXCEPT
950 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type;
951 return static_cast<__tuple_leaf<_Ip, type>&>(__t.base_).get();
954 template <size_t _Ip, class ..._Tp>
955 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
956 const typename tuple_element<_Ip, tuple<_Tp...> >::type&
957 get(const tuple<_Tp...>& __t) _NOEXCEPT
959 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type;
960 return static_cast<const __tuple_leaf<_Ip, type>&>(__t.base_).get();
963 template <size_t _Ip, class ..._Tp>
964 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
965 typename tuple_element<_Ip, tuple<_Tp...> >::type&&
966 get(tuple<_Tp...>&& __t) _NOEXCEPT
968 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type;
969 return static_cast<type&&>(
970 static_cast<__tuple_leaf<_Ip, type>&&>(__t.base_).get());
973 template <size_t _Ip, class ..._Tp>
974 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
975 const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
976 get(const tuple<_Tp...>&& __t) _NOEXCEPT
978 typedef typename tuple_element<_Ip, tuple<_Tp...> >::type type;
979 return static_cast<const type&&>(
980 static_cast<const __tuple_leaf<_Ip, type>&&>(__t.base_).get());
983 #if _LIBCPP_STD_VER > 11
985 namespace __find_detail {
987 static constexpr size_t __not_found = -1;
988 static constexpr size_t __ambiguous = __not_found - 1;
990 inline _LIBCPP_INLINE_VISIBILITY
991 constexpr size_t __find_idx_return(size_t __curr_i, size_t __res, bool __matches) {
992 return !__matches ? __res :
993 (__res == __not_found ? __curr_i : __ambiguous);
996 template <size_t _Nx>
997 inline _LIBCPP_INLINE_VISIBILITY
998 constexpr size_t __find_idx(size_t __i, const bool (&__matches)[_Nx]) {
999 return __i == _Nx ? __not_found :
1000 __find_idx_return(__i, __find_idx(__i + 1, __matches), __matches[__i]);
1003 template <class _T1, class ..._Args>
1004 struct __find_exactly_one_checked {
1005 static constexpr bool __matches[] = {is_same<_T1, _Args>::value...};
1006 static constexpr size_t value = __find_detail::__find_idx(0, __matches);
1007 static_assert (value != __not_found, "type not found in type list" );
1008 static_assert(value != __ambiguous,"type occurs more than once in type list");
1011 template <class _T1>
1012 struct __find_exactly_one_checked<_T1> {
1013 static_assert(!is_same<_T1, _T1>::value, "type not in empty type list");
1016 } // namespace __find_detail;
1018 template <typename _T1, typename... _Args>
1019 struct __find_exactly_one_t
1020 : public __find_detail::__find_exactly_one_checked<_T1, _Args...> {
1023 template <class _T1, class... _Args>
1024 inline _LIBCPP_INLINE_VISIBILITY
1025 constexpr _T1& get(tuple<_Args...>& __tup) noexcept
1027 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup);
1030 template <class _T1, class... _Args>
1031 inline _LIBCPP_INLINE_VISIBILITY
1032 constexpr _T1 const& get(tuple<_Args...> const& __tup) noexcept
1034 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(__tup);
1037 template <class _T1, class... _Args>
1038 inline _LIBCPP_INLINE_VISIBILITY
1039 constexpr _T1&& get(tuple<_Args...>&& __tup) noexcept
1041 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup));
1044 template <class _T1, class... _Args>
1045 inline _LIBCPP_INLINE_VISIBILITY
1046 constexpr _T1 const&& get(tuple<_Args...> const&& __tup) noexcept
1048 return _VSTD::get<__find_exactly_one_t<_T1, _Args...>::value>(_VSTD::move(__tup));
1055 template <class ..._Tp>
1056 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1058 tie(_Tp&... __t) _NOEXCEPT
1060 return tuple<_Tp&...>(__t...);
1063 template <class _Up>
1066 template <class _Tp>
1067 _LIBCPP_INLINE_VISIBILITY
1068 const __ignore_t& operator=(_Tp&&) const {return *this;}
1071 namespace { const __ignore_t<unsigned char> ignore = __ignore_t<unsigned char>(); }
1073 template <class _Tp>
1074 struct __make_tuple_return_impl
1079 template <class _Tp>
1080 struct __make_tuple_return_impl<reference_wrapper<_Tp> >
1085 template <class _Tp>
1086 struct __make_tuple_return
1088 typedef typename __make_tuple_return_impl<typename decay<_Tp>::type>::type type;
1091 template <class... _Tp>
1092 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1093 tuple<typename __make_tuple_return<_Tp>::type...>
1094 make_tuple(_Tp&&... __t)
1096 return tuple<typename __make_tuple_return<_Tp>::type...>(_VSTD::forward<_Tp>(__t)...);
1099 template <class... _Tp>
1100 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1102 forward_as_tuple(_Tp&&... __t) _NOEXCEPT
1104 return tuple<_Tp&&...>(_VSTD::forward<_Tp>(__t)...);
1107 template <size_t _Ip>
1108 struct __tuple_equal
1110 template <class _Tp, class _Up>
1111 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1112 bool operator()(const _Tp& __x, const _Up& __y)
1114 return __tuple_equal<_Ip - 1>()(__x, __y) && _VSTD::get<_Ip-1>(__x) == _VSTD::get<_Ip-1>(__y);
1119 struct __tuple_equal<0>
1121 template <class _Tp, class _Up>
1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1123 bool operator()(const _Tp&, const _Up&)
1129 template <class ..._Tp, class ..._Up>
1130 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1132 operator==(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
1134 return __tuple_equal<sizeof...(_Tp)>()(__x, __y);
1137 template <class ..._Tp, class ..._Up>
1138 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1140 operator!=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
1142 return !(__x == __y);
1145 template <size_t _Ip>
1148 template <class _Tp, class _Up>
1149 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1150 bool operator()(const _Tp& __x, const _Up& __y)
1152 const size_t __idx = tuple_size<_Tp>::value - _Ip;
1153 if (_VSTD::get<__idx>(__x) < _VSTD::get<__idx>(__y))
1155 if (_VSTD::get<__idx>(__y) < _VSTD::get<__idx>(__x))
1157 return __tuple_less<_Ip-1>()(__x, __y);
1162 struct __tuple_less<0>
1164 template <class _Tp, class _Up>
1165 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1166 bool operator()(const _Tp&, const _Up&)
1172 template <class ..._Tp, class ..._Up>
1173 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1175 operator<(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
1177 return __tuple_less<sizeof...(_Tp)>()(__x, __y);
1180 template <class ..._Tp, class ..._Up>
1181 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1183 operator>(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
1188 template <class ..._Tp, class ..._Up>
1189 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1191 operator>=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
1193 return !(__x < __y);
1196 template <class ..._Tp, class ..._Up>
1197 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1199 operator<=(const tuple<_Tp...>& __x, const tuple<_Up...>& __y)
1201 return !(__y < __x);
1206 template <class _Tp, class _Up> struct __tuple_cat_type;
1208 template <class ..._Ttypes, class ..._Utypes>
1209 struct __tuple_cat_type<tuple<_Ttypes...>, __tuple_types<_Utypes...> >
1211 typedef tuple<_Ttypes..., _Utypes...> type;
1214 template <class _ResultTuple, bool _Is_Tuple0TupleLike, class ..._Tuples>
1215 struct __tuple_cat_return_1
1219 template <class ..._Types, class _Tuple0>
1220 struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0>
1222 typedef typename __tuple_cat_type<tuple<_Types...>,
1223 typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type>::type
1227 template <class ..._Types, class _Tuple0, class _Tuple1, class ..._Tuples>
1228 struct __tuple_cat_return_1<tuple<_Types...>, true, _Tuple0, _Tuple1, _Tuples...>
1229 : public __tuple_cat_return_1<
1230 typename __tuple_cat_type<
1232 typename __make_tuple_types<typename remove_reference<_Tuple0>::type>::type
1234 __tuple_like<typename remove_reference<_Tuple1>::type>::value,
1235 _Tuple1, _Tuples...>
1239 template <class ..._Tuples> struct __tuple_cat_return;
1241 template <class _Tuple0, class ..._Tuples>
1242 struct __tuple_cat_return<_Tuple0, _Tuples...>
1243 : public __tuple_cat_return_1<tuple<>,
1244 __tuple_like<typename remove_reference<_Tuple0>::type>::value, _Tuple0,
1250 struct __tuple_cat_return<>
1252 typedef tuple<> type;
1255 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1262 template <class _Rp, class _Indices, class _Tuple0, class ..._Tuples>
1263 struct __tuple_cat_return_ref_imp;
1265 template <class ..._Types, size_t ..._I0, class _Tuple0>
1266 struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>, _Tuple0>
1268 typedef typename remove_reference<_Tuple0>::type _T0;
1269 typedef tuple<_Types..., typename __apply_cv<_Tuple0,
1270 typename tuple_element<_I0, _T0>::type>::type&&...> type;
1273 template <class ..._Types, size_t ..._I0, class _Tuple0, class _Tuple1, class ..._Tuples>
1274 struct __tuple_cat_return_ref_imp<tuple<_Types...>, __tuple_indices<_I0...>,
1275 _Tuple0, _Tuple1, _Tuples...>
1276 : public __tuple_cat_return_ref_imp<
1277 tuple<_Types..., typename __apply_cv<_Tuple0,
1278 typename tuple_element<_I0,
1279 typename remove_reference<_Tuple0>::type>::type>::type&&...>,
1280 typename __make_tuple_indices<tuple_size<typename
1281 remove_reference<_Tuple1>::type>::value>::type,
1282 _Tuple1, _Tuples...>
1286 template <class _Tuple0, class ..._Tuples>
1287 struct __tuple_cat_return_ref
1288 : public __tuple_cat_return_ref_imp<tuple<>,
1289 typename __make_tuple_indices<
1290 tuple_size<typename remove_reference<_Tuple0>::type>::value
1291 >::type, _Tuple0, _Tuples...>
1295 template <class _Types, class _I0, class _J0>
1298 template <class ..._Types, size_t ..._I0, size_t ..._J0>
1299 struct __tuple_cat<tuple<_Types...>, __tuple_indices<_I0...>, __tuple_indices<_J0...> >
1301 template <class _Tuple0>
1302 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1303 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&>::type
1304 operator()(tuple<_Types...> __t, _Tuple0&& __t0)
1306 return forward_as_tuple(_VSTD::forward<_Types>(_VSTD::get<_I0>(__t))...,
1307 _VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))...);
1310 template <class _Tuple0, class _Tuple1, class ..._Tuples>
1311 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1312 typename __tuple_cat_return_ref<tuple<_Types...>&&, _Tuple0&&, _Tuple1&&, _Tuples&&...>::type
1313 operator()(tuple<_Types...> __t, _Tuple0&& __t0, _Tuple1&& __t1, _Tuples&& ...__tpls)
1315 typedef typename remove_reference<_Tuple0>::type _T0;
1316 typedef typename remove_reference<_Tuple1>::type _T1;
1318 tuple<_Types..., typename __apply_cv<_Tuple0, typename tuple_element<_J0, _T0>::type>::type&&...>,
1319 typename __make_tuple_indices<sizeof ...(_Types) + tuple_size<_T0>::value>::type,
1320 typename __make_tuple_indices<tuple_size<_T1>::value>::type>()
1322 _VSTD::forward<_Types>(_VSTD::get<_I0>(__t))...,
1323 _VSTD::get<_J0>(_VSTD::forward<_Tuple0>(__t0))...
1325 _VSTD::forward<_Tuple1>(__t1),
1326 _VSTD::forward<_Tuples>(__tpls)...);
1330 template <class _Tuple0, class... _Tuples>
1331 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1332 typename __tuple_cat_return<_Tuple0, _Tuples...>::type
1333 tuple_cat(_Tuple0&& __t0, _Tuples&&... __tpls)
1335 typedef typename remove_reference<_Tuple0>::type _T0;
1336 return __tuple_cat<tuple<>, __tuple_indices<>,
1337 typename __make_tuple_indices<tuple_size<_T0>::value>::type>()
1338 (tuple<>(), _VSTD::forward<_Tuple0>(__t0),
1339 _VSTD::forward<_Tuples>(__tpls)...);
1342 template <class ..._Tp, class _Alloc>
1343 struct _LIBCPP_TEMPLATE_VIS uses_allocator<tuple<_Tp...>, _Alloc>
1346 #endif // _LIBCPP_HAS_NO_VARIADICS
1348 #ifndef _LIBCPP_CXX03_LANG
1349 template <class _T1, class _T2>
1350 template <class... _Args1, class... _Args2, size_t ..._I1, size_t ..._I2>
1351 inline _LIBCPP_INLINE_VISIBILITY
1352 pair<_T1, _T2>::pair(piecewise_construct_t,
1353 tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args,
1354 __tuple_indices<_I1...>, __tuple_indices<_I2...>)
1355 : first(_VSTD::forward<_Args1>(_VSTD::get<_I1>( __first_args))...),
1356 second(_VSTD::forward<_Args2>(_VSTD::get<_I2>(__second_args))...)
1359 #endif // _LIBCPP_CXX03_LANG
1361 #if _LIBCPP_STD_VER > 14
1362 template <class _Tp>
1363 constexpr size_t tuple_size_v = tuple_size<_Tp>::value;
1365 #define _LIBCPP_NOEXCEPT_RETURN(...) noexcept(noexcept(__VA_ARGS__)) { return __VA_ARGS__; }
1367 template <class _Fn, class _Tuple, size_t ..._Id>
1368 inline _LIBCPP_INLINE_VISIBILITY
1369 constexpr decltype(auto) __apply_tuple_impl(_Fn && __f, _Tuple && __t,
1370 __tuple_indices<_Id...>)
1371 _LIBCPP_NOEXCEPT_RETURN(
1372 _VSTD::__invoke_constexpr(
1373 _VSTD::forward<_Fn>(__f),
1374 _VSTD::get<_Id>(_VSTD::forward<_Tuple>(__t))...)
1377 template <class _Fn, class _Tuple>
1378 inline _LIBCPP_INLINE_VISIBILITY
1379 constexpr decltype(auto) apply(_Fn && __f, _Tuple && __t)
1380 _LIBCPP_NOEXCEPT_RETURN(
1381 _VSTD::__apply_tuple_impl(
1382 _VSTD::forward<_Fn>(__f), _VSTD::forward<_Tuple>(__t),
1383 typename __make_tuple_indices<tuple_size_v<decay_t<_Tuple>>>::type{})
1386 template <class _Tp, class _Tuple, size_t... _Idx>
1387 inline _LIBCPP_INLINE_VISIBILITY
1388 constexpr _Tp __make_from_tuple_impl(_Tuple&& __t, __tuple_indices<_Idx...>)
1389 _LIBCPP_NOEXCEPT_RETURN(
1390 _Tp(_VSTD::get<_Idx>(_VSTD::forward<_Tuple>(__t))...)
1393 template <class _Tp, class _Tuple>
1394 inline _LIBCPP_INLINE_VISIBILITY
1395 constexpr _Tp make_from_tuple(_Tuple&& __t)
1396 _LIBCPP_NOEXCEPT_RETURN(
1397 _VSTD::__make_from_tuple_impl<_Tp>(_VSTD::forward<_Tuple>(__t),
1398 typename __make_tuple_indices<tuple_size_v<decay_t<_Tuple>>>::type{})
1401 #undef _LIBCPP_NOEXCEPT_RETURN
1403 #endif // _LIBCPP_STD_VER > 14
1405 _LIBCPP_END_NAMESPACE_STD
1407 #endif // _LIBCPP_TUPLE