| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___TUPLE |
| #define _LIBCPP___TUPLE |
| |
| #include <__config> |
| #include <cstddef> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size; |
| |
| #if !defined(_LIBCPP_CXX03_LANG) |
| template <class _Tp, class...> |
| using __enable_if_tuple_size_imp = _Tp; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_size<__enable_if_tuple_size_imp< |
| const _Tp, |
| typename enable_if<!is_volatile<_Tp>::value>::type, |
| integral_constant<size_t, sizeof(tuple_size<_Tp>)>>> |
| : public integral_constant<size_t, tuple_size<_Tp>::value> {}; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_size<__enable_if_tuple_size_imp< |
| volatile _Tp, |
| typename enable_if<!is_const<_Tp>::value>::type, |
| integral_constant<size_t, sizeof(tuple_size<_Tp>)>>> |
| : public integral_constant<size_t, tuple_size<_Tp>::value> {}; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_size<__enable_if_tuple_size_imp< |
| const volatile _Tp, |
| integral_constant<size_t, sizeof(tuple_size<_Tp>)>>> |
| : public integral_constant<size_t, tuple_size<_Tp>::value> {}; |
| |
| #else |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<const _Tp> : public tuple_size<_Tp> {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<volatile _Tp> : public tuple_size<_Tp> {}; |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<const volatile _Tp> : public tuple_size<_Tp> {}; |
| #endif |
| |
| template <size_t _Ip, class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_element; |
| |
| template <size_t _Ip, class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const _Tp> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type; |
| }; |
| |
| template <size_t _Ip, class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, volatile _Tp> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type; |
| }; |
| |
| template <size_t _Ip, class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const volatile _Tp> |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename add_cv<typename tuple_element<_Ip, _Tp>::type>::type type; |
| }; |
| |
| template <class _Tp> struct __tuple_like : false_type {}; |
| |
| template <class _Tp> struct __tuple_like<const _Tp> : public __tuple_like<_Tp> {}; |
| template <class _Tp> struct __tuple_like<volatile _Tp> : public __tuple_like<_Tp> {}; |
| template <class _Tp> struct __tuple_like<const volatile _Tp> : public __tuple_like<_Tp> {}; |
| |
| // tuple specializations |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| |
| template <size_t...> struct __tuple_indices {}; |
| |
| template <class _IdxType, _IdxType... _Values> |
| struct __integer_sequence { |
| template <template <class _OIdxType, _OIdxType...> class _ToIndexSeq, class _ToIndexType> |
| using __convert = _ToIndexSeq<_ToIndexType, _Values...>; |
| |
| template <size_t _Sp> |
| using __to_tuple_indices = __tuple_indices<(_Values + _Sp)...>; |
| }; |
| |
| #if !__has_builtin(__make_integer_seq) || defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE) |
| namespace __detail { |
| |
| template<typename _Tp, size_t ..._Extra> struct __repeat; |
| template<typename _Tp, _Tp ..._Np, size_t ..._Extra> struct __repeat<__integer_sequence<_Tp, _Np...>, _Extra...> { |
| typedef _LIBCPP_NODEBUG_TYPE __integer_sequence<_Tp, |
| _Np..., |
| sizeof...(_Np) + _Np..., |
| 2 * sizeof...(_Np) + _Np..., |
| 3 * sizeof...(_Np) + _Np..., |
| 4 * sizeof...(_Np) + _Np..., |
| 5 * sizeof...(_Np) + _Np..., |
| 6 * sizeof...(_Np) + _Np..., |
| 7 * sizeof...(_Np) + _Np..., |
| _Extra...> type; |
| }; |
| |
| template<size_t _Np> struct __parity; |
| template<size_t _Np> struct __make : __parity<_Np % 8>::template __pmake<_Np> {}; |
| |
| template<> struct __make<0> { typedef __integer_sequence<size_t> type; }; |
| template<> struct __make<1> { typedef __integer_sequence<size_t, 0> type; }; |
| template<> struct __make<2> { typedef __integer_sequence<size_t, 0, 1> type; }; |
| template<> struct __make<3> { typedef __integer_sequence<size_t, 0, 1, 2> type; }; |
| template<> struct __make<4> { typedef __integer_sequence<size_t, 0, 1, 2, 3> type; }; |
| template<> struct __make<5> { typedef __integer_sequence<size_t, 0, 1, 2, 3, 4> type; }; |
| template<> struct __make<6> { typedef __integer_sequence<size_t, 0, 1, 2, 3, 4, 5> type; }; |
| template<> struct __make<7> { typedef __integer_sequence<size_t, 0, 1, 2, 3, 4, 5, 6> type; }; |
| |
| template<> struct __parity<0> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type> {}; }; |
| template<> struct __parity<1> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 1> {}; }; |
| template<> struct __parity<2> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 2, _Np - 1> {}; }; |
| template<> struct __parity<3> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 3, _Np - 2, _Np - 1> {}; }; |
| template<> struct __parity<4> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; |
| template<> struct __parity<5> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; |
| template<> struct __parity<6> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; |
| template<> struct __parity<7> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 7, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; }; |
| |
| } // namespace detail |
| |
| #endif // !__has_builtin(__make_integer_seq) || defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE) |
| |
| #if __has_builtin(__make_integer_seq) |
| template <size_t _Ep, size_t _Sp> |
| using __make_indices_imp = |
| typename __make_integer_seq<__integer_sequence, size_t, _Ep - _Sp>::template |
| __to_tuple_indices<_Sp>; |
| #else |
| template <size_t _Ep, size_t _Sp> |
| using __make_indices_imp = |
| typename __detail::__make<_Ep - _Sp>::type::template __to_tuple_indices<_Sp>; |
| |
| #endif |
| |
| template <size_t _Ep, size_t _Sp = 0> |
| struct __make_tuple_indices |
| { |
| static_assert(_Sp <= _Ep, "__make_tuple_indices input error"); |
| typedef __make_indices_imp<_Ep, _Sp> type; |
| }; |
| |
| |
| template <class ..._Tp> class _LIBCPP_TEMPLATE_VIS tuple; |
| |
| template <class... _Tp> struct __tuple_like<tuple<_Tp...> > : true_type {}; |
| |
| template <class ..._Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_size<tuple<_Tp...> > |
| : public integral_constant<size_t, sizeof...(_Tp)> |
| { |
| }; |
| |
| template <size_t _Ip, class ..._Tp> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| typename tuple_element<_Ip, tuple<_Tp...> >::type& |
| get(tuple<_Tp...>&) _NOEXCEPT; |
| |
| template <size_t _Ip, class ..._Tp> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const typename tuple_element<_Ip, tuple<_Tp...> >::type& |
| get(const tuple<_Tp...>&) _NOEXCEPT; |
| |
| template <size_t _Ip, class ..._Tp> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| typename tuple_element<_Ip, tuple<_Tp...> >::type&& |
| get(tuple<_Tp...>&&) _NOEXCEPT; |
| |
| template <size_t _Ip, class ..._Tp> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const typename tuple_element<_Ip, tuple<_Tp...> >::type&& |
| get(const tuple<_Tp...>&&) _NOEXCEPT; |
| |
| #endif // !defined(_LIBCPP_CXX03_LANG) |
| |
| // pair specializations |
| |
| template <class _T1, class _T2> struct __tuple_like<pair<_T1, _T2> > : true_type {}; |
| |
| template <size_t _Ip, class _T1, class _T2> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| typename tuple_element<_Ip, pair<_T1, _T2> >::type& |
| get(pair<_T1, _T2>&) _NOEXCEPT; |
| |
| template <size_t _Ip, class _T1, class _T2> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const typename tuple_element<_Ip, pair<_T1, _T2> >::type& |
| get(const pair<_T1, _T2>&) _NOEXCEPT; |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| template <size_t _Ip, class _T1, class _T2> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| typename tuple_element<_Ip, pair<_T1, _T2> >::type&& |
| get(pair<_T1, _T2>&&) _NOEXCEPT; |
| |
| template <size_t _Ip, class _T1, class _T2> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const typename tuple_element<_Ip, pair<_T1, _T2> >::type&& |
| get(const pair<_T1, _T2>&&) _NOEXCEPT; |
| #endif |
| |
| // array specializations |
| |
| template <class _Tp, size_t _Size> struct _LIBCPP_TEMPLATE_VIS array; |
| |
| template <class _Tp, size_t _Size> struct __tuple_like<array<_Tp, _Size> > : true_type {}; |
| |
| template <size_t _Ip, class _Tp, size_t _Size> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| _Tp& |
| get(array<_Tp, _Size>&) _NOEXCEPT; |
| |
| template <size_t _Ip, class _Tp, size_t _Size> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const _Tp& |
| get(const array<_Tp, _Size>&) _NOEXCEPT; |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| template <size_t _Ip, class _Tp, size_t _Size> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| _Tp&& |
| get(array<_Tp, _Size>&&) _NOEXCEPT; |
| |
| template <size_t _Ip, class _Tp, size_t _Size> |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| const _Tp&& |
| get(const array<_Tp, _Size>&&) _NOEXCEPT; |
| #endif |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| |
| // __tuple_types |
| |
| template <class ..._Tp> struct __tuple_types {}; |
| |
| #if !__has_builtin(__type_pack_element) |
| |
| namespace __indexer_detail { |
| |
| template <size_t _Idx, class _Tp> |
| struct __indexed { using type _LIBCPP_NODEBUG_TYPE = _Tp; }; |
| |
| template <class _Types, class _Indexes> struct __indexer; |
| |
| template <class ..._Types, size_t ..._Idx> |
| struct __indexer<__tuple_types<_Types...>, __tuple_indices<_Idx...>> |
| : __indexed<_Idx, _Types>... |
| {}; |
| |
| template <size_t _Idx, class _Tp> |
| __indexed<_Idx, _Tp> __at_index(__indexed<_Idx, _Tp> const&); |
| |
| } // namespace __indexer_detail |
| |
| template <size_t _Idx, class ..._Types> |
| using __type_pack_element _LIBCPP_NODEBUG_TYPE = typename decltype( |
| __indexer_detail::__at_index<_Idx>( |
| __indexer_detail::__indexer< |
| __tuple_types<_Types...>, |
| typename __make_tuple_indices<sizeof...(_Types)>::type |
| >{}) |
| )::type; |
| #endif |
| |
| template <size_t _Ip, class ..._Types> |
| struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, __tuple_types<_Types...>> |
| { |
| static_assert(_Ip < sizeof...(_Types), "tuple_element index out of range"); |
| typedef _LIBCPP_NODEBUG_TYPE __type_pack_element<_Ip, _Types...> type; |
| }; |
| |
| |
| template <class ..._Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_size<__tuple_types<_Tp...> > |
| : public integral_constant<size_t, sizeof...(_Tp)> |
| { |
| }; |
| |
| template <class... _Tp> struct __tuple_like<__tuple_types<_Tp...> > : true_type {}; |
| |
| template <bool _ApplyLV, bool _ApplyConst, bool _ApplyVolatile> |
| struct __apply_cv_mf; |
| template <> |
| struct __apply_cv_mf<false, false, false> { |
| template <class _Tp> using __apply = _Tp; |
| }; |
| template <> |
| struct __apply_cv_mf<false, true, false> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = const _Tp; |
| }; |
| template <> |
| struct __apply_cv_mf<false, false, true> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = volatile _Tp; |
| }; |
| template <> |
| struct __apply_cv_mf<false, true, true> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = const volatile _Tp; |
| }; |
| template <> |
| struct __apply_cv_mf<true, false, false> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = _Tp&; |
| }; |
| template <> |
| struct __apply_cv_mf<true, true, false> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = const _Tp&; |
| }; |
| template <> |
| struct __apply_cv_mf<true, false, true> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = volatile _Tp&; |
| }; |
| template <> |
| struct __apply_cv_mf<true, true, true> { |
| template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = const volatile _Tp&; |
| }; |
| template <class _Tp, class _RawTp = typename remove_reference<_Tp>::type> |
| using __apply_cv_t _LIBCPP_NODEBUG_TYPE = __apply_cv_mf< |
| is_lvalue_reference<_Tp>::value, |
| is_const<_RawTp>::value, |
| is_volatile<_RawTp>::value>; |
| |
| // __make_tuple_types |
| |
| // __make_tuple_types<_Tuple<_Types...>, _Ep, _Sp>::type is a |
| // __tuple_types<_Types...> using only those _Types in the range [_Sp, _Ep). |
| // _Sp defaults to 0 and _Ep defaults to tuple_size<_Tuple>. If _Tuple is a |
| // lvalue_reference type, then __tuple_types<_Types&...> is the result. |
| |
| template <class _TupleTypes, class _TupleIndices> |
| struct __make_tuple_types_flat; |
| |
| template <template <class...> class _Tuple, class ..._Types, size_t ..._Idx> |
| struct __make_tuple_types_flat<_Tuple<_Types...>, __tuple_indices<_Idx...>> { |
| // Specialization for pair, tuple, and __tuple_types |
| template <class _Tp, class _ApplyFn = __apply_cv_t<_Tp>> |
| using __apply_quals _LIBCPP_NODEBUG_TYPE = __tuple_types< |
| typename _ApplyFn::template __apply<__type_pack_element<_Idx, _Types...>>... |
| >; |
| }; |
| |
| template <class _Vt, size_t _Np, size_t ..._Idx> |
| struct __make_tuple_types_flat<array<_Vt, _Np>, __tuple_indices<_Idx...>> { |
| template <size_t> |
| using __value_type = _Vt; |
| template <class _Tp, class _ApplyFn = __apply_cv_t<_Tp>> |
| using __apply_quals = __tuple_types< |
| typename _ApplyFn::template __apply<__value_type<_Idx>>... |
| >; |
| }; |
| |
| template <class _Tp, size_t _Ep = tuple_size<typename remove_reference<_Tp>::type>::value, |
| size_t _Sp = 0, |
| bool _SameSize = (_Ep == tuple_size<typename remove_reference<_Tp>::type>::value)> |
| struct __make_tuple_types |
| { |
| static_assert(_Sp <= _Ep, "__make_tuple_types input error"); |
| using _RawTp = typename remove_cv<typename remove_reference<_Tp>::type>::type; |
| using _Maker = __make_tuple_types_flat<_RawTp, typename __make_tuple_indices<_Ep, _Sp>::type>; |
| using type = typename _Maker::template __apply_quals<_Tp>; |
| }; |
| |
| template <class ..._Types, size_t _Ep> |
| struct __make_tuple_types<tuple<_Types...>, _Ep, 0, true> { |
| typedef _LIBCPP_NODEBUG_TYPE __tuple_types<_Types...> type; |
| }; |
| |
| template <class ..._Types, size_t _Ep> |
| struct __make_tuple_types<__tuple_types<_Types...>, _Ep, 0, true> { |
| typedef _LIBCPP_NODEBUG_TYPE __tuple_types<_Types...> type; |
| }; |
| |
| template <bool ..._Preds> |
| struct __all_dummy; |
| |
| template <bool ..._Pred> |
| using __all = _IsSame<__all_dummy<_Pred...>, __all_dummy<((void)_Pred, true)...>>; |
| |
| struct __tuple_sfinae_base { |
| template <template <class, class...> class _Trait, |
| class ..._LArgs, class ..._RArgs> |
| static auto __do_test(__tuple_types<_LArgs...>, __tuple_types<_RArgs...>) |
| -> __all<typename enable_if<_Trait<_LArgs, _RArgs>::value, bool>::type{true}...>; |
| template <template <class...> class> |
| static auto __do_test(...) -> false_type; |
| |
| template <class _FromArgs, class _ToArgs> |
| using __constructible = decltype(__do_test<is_constructible>(_ToArgs{}, _FromArgs{})); |
| template <class _FromArgs, class _ToArgs> |
| using __convertible = decltype(__do_test<is_convertible>(_FromArgs{}, _ToArgs{})); |
| template <class _FromArgs, class _ToArgs> |
| using __assignable = decltype(__do_test<is_assignable>(_ToArgs{}, _FromArgs{})); |
| }; |
| |
| // __tuple_convertible |
| |
| template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value, |
| bool = __tuple_like<_Up>::value> |
| struct __tuple_convertible |
| : public false_type {}; |
| |
| template <class _Tp, class _Up> |
| struct __tuple_convertible<_Tp, _Up, true, true> |
| : public __tuple_sfinae_base::__convertible< |
| typename __make_tuple_types<_Tp>::type |
| , typename __make_tuple_types<_Up>::type |
| > |
| {}; |
| |
| // __tuple_constructible |
| |
| template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value, |
| bool = __tuple_like<_Up>::value> |
| struct __tuple_constructible |
| : public false_type {}; |
| |
| template <class _Tp, class _Up> |
| struct __tuple_constructible<_Tp, _Up, true, true> |
| : public __tuple_sfinae_base::__constructible< |
| typename __make_tuple_types<_Tp>::type |
| , typename __make_tuple_types<_Up>::type |
| > |
| {}; |
| |
| // __tuple_assignable |
| |
| template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value, |
| bool = __tuple_like<_Up>::value> |
| struct __tuple_assignable |
| : public false_type {}; |
| |
| template <class _Tp, class _Up> |
| struct __tuple_assignable<_Tp, _Up, true, true> |
| : public __tuple_sfinae_base::__assignable< |
| typename __make_tuple_types<_Tp>::type |
| , typename __make_tuple_types<_Up&>::type |
| > |
| {}; |
| |
| |
| template <size_t _Ip, class ..._Tp> |
| struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, tuple<_Tp...> > |
| { |
| typedef _LIBCPP_NODEBUG_TYPE typename tuple_element<_Ip, __tuple_types<_Tp...> >::type type; |
| }; |
| |
| #if _LIBCPP_STD_VER > 11 |
| template <size_t _Ip, class ..._Tp> |
| using tuple_element_t _LIBCPP_NODEBUG_TYPE = typename tuple_element <_Ip, _Tp...>::type; |
| #endif |
| |
| template <bool _IsTuple, class _SizeTrait, size_t _Expected> |
| struct __tuple_like_with_size_imp : false_type {}; |
| |
| template <class _SizeTrait, size_t _Expected> |
| struct __tuple_like_with_size_imp<true, _SizeTrait, _Expected> |
| : integral_constant<bool, _SizeTrait::value == _Expected> {}; |
| |
| template <class _Tuple, size_t _ExpectedSize, |
| class _RawTuple = typename __uncvref<_Tuple>::type> |
| using __tuple_like_with_size _LIBCPP_NODEBUG_TYPE = __tuple_like_with_size_imp< |
| __tuple_like<_RawTuple>::value, |
| tuple_size<_RawTuple>, _ExpectedSize |
| >; |
| |
| struct _LIBCPP_TYPE_VIS __check_tuple_constructor_fail { |
| |
| static constexpr bool __enable_explicit_default() { return false; } |
| static constexpr bool __enable_implicit_default() { return false; } |
| template <class ...> |
| static constexpr bool __enable_explicit() { return false; } |
| template <class ...> |
| static constexpr bool __enable_implicit() { return false; } |
| template <class ...> |
| static constexpr bool __enable_assign() { return false; } |
| }; |
| #endif // !defined(_LIBCPP_CXX03_LANG) |
| |
| #if _LIBCPP_STD_VER > 14 |
| |
| template <bool _CanCopy, bool _CanMove> |
| struct __sfinae_ctor_base {}; |
| template <> |
| struct __sfinae_ctor_base<false, false> { |
| __sfinae_ctor_base() = default; |
| __sfinae_ctor_base(__sfinae_ctor_base const&) = delete; |
| __sfinae_ctor_base(__sfinae_ctor_base &&) = delete; |
| __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default; |
| __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default; |
| }; |
| template <> |
| struct __sfinae_ctor_base<true, false> { |
| __sfinae_ctor_base() = default; |
| __sfinae_ctor_base(__sfinae_ctor_base const&) = default; |
| __sfinae_ctor_base(__sfinae_ctor_base &&) = delete; |
| __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default; |
| __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default; |
| }; |
| template <> |
| struct __sfinae_ctor_base<false, true> { |
| __sfinae_ctor_base() = default; |
| __sfinae_ctor_base(__sfinae_ctor_base const&) = delete; |
| __sfinae_ctor_base(__sfinae_ctor_base &&) = default; |
| __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default; |
| __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default; |
| }; |
| |
| template <bool _CanCopy, bool _CanMove> |
| struct __sfinae_assign_base {}; |
| template <> |
| struct __sfinae_assign_base<false, false> { |
| __sfinae_assign_base() = default; |
| __sfinae_assign_base(__sfinae_assign_base const&) = default; |
| __sfinae_assign_base(__sfinae_assign_base &&) = default; |
| __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete; |
| __sfinae_assign_base& operator=(__sfinae_assign_base&&) = delete; |
| }; |
| template <> |
| struct __sfinae_assign_base<true, false> { |
| __sfinae_assign_base() = default; |
| __sfinae_assign_base(__sfinae_assign_base const&) = default; |
| __sfinae_assign_base(__sfinae_assign_base &&) = default; |
| __sfinae_assign_base& operator=(__sfinae_assign_base const&) = default; |
| __sfinae_assign_base& operator=(__sfinae_assign_base&&) = delete; |
| }; |
| template <> |
| struct __sfinae_assign_base<false, true> { |
| __sfinae_assign_base() = default; |
| __sfinae_assign_base(__sfinae_assign_base const&) = default; |
| __sfinae_assign_base(__sfinae_assign_base &&) = default; |
| __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete; |
| __sfinae_assign_base& operator=(__sfinae_assign_base&&) = default; |
| }; |
| #endif // _LIBCPP_STD_VER > 14 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TUPLE |
