| //===----------------------------------------------------------------------===// |
| // |
| // 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_MAKE_TUPLE_TYPES_H |
| #define _LIBCPP___TUPLE_MAKE_TUPLE_TYPES_H |
| |
| #include <__config> |
| #include <__fwd/array.h> |
| #include <__fwd/tuple.h> |
| #include <__tuple/tuple_element.h> |
| #include <__tuple/tuple_indices.h> |
| #include <__tuple/tuple_size.h> |
| #include <__tuple/tuple_types.h> |
| #include <__type_traits/apply_cv.h> |
| #include <__type_traits/remove_cv.h> |
| #include <__type_traits/remove_reference.h> |
| #include <cstddef> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #ifndef _LIBCPP_CXX03_LANG |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| // __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> |
| using __apply_quals _LIBCPP_NODEBUG = __tuple_types<__apply_cv_t<_Tp, __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> |
| using __apply_quals = __tuple_types<__apply_cv_t<_Tp, __value_type<_Idx>>...>; |
| }; |
| |
| template <class _Tp, size_t _Ep = tuple_size<__libcpp_remove_reference_t<_Tp> >::value, |
| size_t _Sp = 0, |
| bool _SameSize = (_Ep == tuple_size<__libcpp_remove_reference_t<_Tp> >::value)> |
| struct __make_tuple_types |
| { |
| static_assert(_Sp <= _Ep, "__make_tuple_types input error"); |
| using _RawTp = __remove_cv_t<__libcpp_remove_reference_t<_Tp> >; |
| 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 __tuple_types<_Types...> type; |
| }; |
| |
| template <class ..._Types, size_t _Ep> |
| struct __make_tuple_types<__tuple_types<_Types...>, _Ep, 0, true> { |
| typedef _LIBCPP_NODEBUG __tuple_types<_Types...> type; |
| }; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_CXX03_LANG |
| |
| #endif // _LIBCPP___TUPLE_MAKE_TUPLE_TYPES_H |