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// -*- C++ -*- |
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//===----------------------------------------------------------------------===// |
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// |
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// The LLVM Compiler Infrastructure |
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// |
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// This file is dual licensed under the MIT and the University of Illinois Open |
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// Source Licenses. See LICENSE.TXT for details. |
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// |
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//===----------------------------------------------------------------------===// |
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|
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#ifndef _LIBCPP___TUPLE |
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#define _LIBCPP___TUPLE |
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#include <__config> |
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#include <cstddef> |
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#include <type_traits> |
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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#pragma GCC system_header |
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#endif |
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_LIBCPP_BEGIN_NAMESPACE_STD |
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template <class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_size; |
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|
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template <class _Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_size<const _Tp> |
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: public tuple_size<_Tp> {};
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|
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template <class _Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_size<volatile _Tp> |
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: public tuple_size<_Tp> {};
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|
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template <class _Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_size<const volatile _Tp> |
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: public tuple_size<_Tp> {};
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template <size_t _Ip, class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_element; |
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template <size_t _Ip, class _Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, const _Tp> |
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{
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public: |
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typedef typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type; |
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}; |
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template <size_t _Ip, class _Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, volatile _Tp> |
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{
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public: |
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typedef typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type; |
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}; |
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template <size_t _Ip, class _Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, const volatile _Tp> |
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{
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public: |
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typedef typename add_cv<typename tuple_element<_Ip, _Tp>::type>::type type; |
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}; |
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template <class _Tp> struct __tuple_like : false_type {};
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template <class _Tp> struct __tuple_like<const _Tp> : public __tuple_like<_Tp> {};
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template <class _Tp> struct __tuple_like<volatile _Tp> : public __tuple_like<_Tp> {};
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template <class _Tp> struct __tuple_like<const volatile _Tp> : public __tuple_like<_Tp> {};
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|
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// tuple specializations |
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#if !defined(_LIBCPP_HAS_NO_VARIADICS) |
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template <class ..._Tp> class _LIBCPP_TYPE_VIS_ONLY tuple; |
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template <class... _Tp> struct __tuple_like<tuple<_Tp...> > : true_type {};
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template <size_t _Ip, class ..._Tp> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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typename tuple_element<_Ip, tuple<_Tp...> >::type& |
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get(tuple<_Tp...>&) _NOEXCEPT; |
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|
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template <size_t _Ip, class ..._Tp> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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const typename tuple_element<_Ip, tuple<_Tp...> >::type& |
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get(const tuple<_Tp...>&) _NOEXCEPT; |
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|
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template <size_t _Ip, class ..._Tp> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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typename tuple_element<_Ip, tuple<_Tp...> >::type&& |
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get(tuple<_Tp...>&&) _NOEXCEPT; |
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#endif |
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|
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// pair specializations |
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template <class _T1, class _T2> struct _LIBCPP_TYPE_VIS_ONLY pair; |
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template <class _T1, class _T2> struct __tuple_like<pair<_T1, _T2> > : true_type {};
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template <size_t _Ip, class _T1, class _T2> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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typename tuple_element<_Ip, pair<_T1, _T2> >::type& |
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get(pair<_T1, _T2>&) _NOEXCEPT; |
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|
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template <size_t _Ip, class _T1, class _T2> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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const typename tuple_element<_Ip, pair<_T1, _T2> >::type& |
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get(const pair<_T1, _T2>&) _NOEXCEPT; |
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|
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#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) |
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template <size_t _Ip, class _T1, class _T2> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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typename tuple_element<_Ip, pair<_T1, _T2> >::type&& |
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get(pair<_T1, _T2>&&) _NOEXCEPT; |
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#endif |
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|
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// array specializations |
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template <class _Tp, size_t _Size> struct _LIBCPP_TYPE_VIS_ONLY array; |
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template <class _Tp, size_t _Size> struct __tuple_like<array<_Tp, _Size> > : true_type {};
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template <size_t _Ip, class _Tp, size_t _Size> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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_Tp& |
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get(array<_Tp, _Size>&) _NOEXCEPT; |
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template <size_t _Ip, class _Tp, size_t _Size> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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const _Tp& |
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get(const array<_Tp, _Size>&) _NOEXCEPT; |
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|
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#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) |
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template <size_t _Ip, class _Tp, size_t _Size> |
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_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 |
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_Tp&& |
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get(array<_Tp, _Size>&&) _NOEXCEPT; |
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#endif |
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#if !defined(_LIBCPP_HAS_NO_VARIADICS) |
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|
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// __lazy_and |
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template <bool _Last, class ..._Preds> |
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struct __lazy_and_impl; |
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template <class ..._Preds> |
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struct __lazy_and_impl<false, _Preds...> : false_type {};
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template <> |
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struct __lazy_and_impl<true> : true_type {};
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template <class _Pred> |
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struct __lazy_and_impl<true, _Pred> : integral_constant<bool, _Pred::type::value> {};
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template <class _Hp, class ..._Tp> |
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struct __lazy_and_impl<true, _Hp, _Tp...> : __lazy_and_impl<_Hp::type::value, _Tp...> {};
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template <class _P1, class ..._Pr> |
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struct __lazy_and : __lazy_and_impl<_P1::type::value, _Pr...> {};
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// __lazy_not |
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template <class _Pred> |
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struct __lazy_not : integral_constant<bool, !_Pred::type::value> {};
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// __make_tuple_indices |
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template <size_t...> struct __tuple_indices {};
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template <size_t _Sp, class _IntTuple, size_t _Ep> |
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struct __make_indices_imp; |
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template <size_t _Sp, size_t ..._Indices, size_t _Ep> |
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struct __make_indices_imp<_Sp, __tuple_indices<_Indices...>, _Ep> |
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{
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typedef typename __make_indices_imp<_Sp+1, __tuple_indices<_Indices..., _Sp>, _Ep>::type type; |
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}; |
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template <size_t _Ep, size_t ..._Indices> |
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struct __make_indices_imp<_Ep, __tuple_indices<_Indices...>, _Ep> |
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{
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typedef __tuple_indices<_Indices...> type; |
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}; |
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template <size_t _Ep, size_t _Sp = 0> |
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struct __make_tuple_indices |
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{
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static_assert(_Sp <= _Ep, "__make_tuple_indices input error"); |
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typedef typename __make_indices_imp<_Sp, __tuple_indices<>, _Ep>::type type; |
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}; |
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// __tuple_types |
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template <class ..._Tp> struct __tuple_types {};
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template <size_t _Ip> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, __tuple_types<> > |
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{
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public: |
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static_assert(_Ip == 0, "tuple_element index out of range"); |
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static_assert(_Ip != 0, "tuple_element index out of range"); |
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}; |
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template <class _Hp, class ..._Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_element<0, __tuple_types<_Hp, _Tp...> > |
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{
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public: |
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typedef _Hp type; |
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}; |
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template <size_t _Ip, class _Hp, class ..._Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, __tuple_types<_Hp, _Tp...> > |
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{
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public: |
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typedef typename tuple_element<_Ip-1, __tuple_types<_Tp...> >::type type; |
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}; |
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template <class ..._Tp> |
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class _LIBCPP_TYPE_VIS_ONLY tuple_size<__tuple_types<_Tp...> > |
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: public integral_constant<size_t, sizeof...(_Tp)> |
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{
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}; |
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template <class... _Tp> struct __tuple_like<__tuple_types<_Tp...> > : true_type {};
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// __make_tuple_types |
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// __make_tuple_types<_Tuple<_Types...>, _Ep, _Sp>::type is a |
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// __tuple_types<_Types...> using only those _Types in the range [_Sp, _Ep). |
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// _Sp defaults to 0 and _Ep defaults to tuple_size<_Tuple>. If _Tuple is a |
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// lvalue_reference type, then __tuple_types<_Types&...> is the result. |
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template <class _TupleTypes, class _Tp, size_t _Sp, size_t _Ep> |
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struct __make_tuple_types_imp; |
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template <class ..._Types, class _Tp, size_t _Sp, size_t _Ep> |
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struct __make_tuple_types_imp<__tuple_types<_Types...>, _Tp, _Sp, _Ep> |
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{
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typedef typename remove_reference<_Tp>::type _Tpr; |
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typedef typename __make_tuple_types_imp<__tuple_types<_Types..., |
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typename conditional<is_lvalue_reference<_Tp>::value, |
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typename tuple_element<_Sp, _Tpr>::type&, |
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typename tuple_element<_Sp, _Tpr>::type>::type>, |
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_Tp, _Sp+1, _Ep>::type type; |
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}; |
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template <class ..._Types, class _Tp, size_t _Ep> |
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struct __make_tuple_types_imp<__tuple_types<_Types...>, _Tp, _Ep, _Ep> |
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{
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typedef __tuple_types<_Types...> type; |
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}; |
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template <class _Tp, size_t _Ep = tuple_size<typename remove_reference<_Tp>::type>::value, size_t _Sp = 0> |
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struct __make_tuple_types |
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{
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static_assert(_Sp <= _Ep, "__make_tuple_types input error"); |
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typedef typename __make_tuple_types_imp<__tuple_types<>, _Tp, _Sp, _Ep>::type type; |
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}; |
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// __tuple_convertible |
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template <class, class> |
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struct __tuple_convertible_imp : public false_type {};
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template <class _Tp0, class ..._Tp, class _Up0, class ..._Up> |
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struct __tuple_convertible_imp<__tuple_types<_Tp0, _Tp...>, __tuple_types<_Up0, _Up...> > |
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: public integral_constant<bool, |
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is_convertible<_Tp0, _Up0>::value && |
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__tuple_convertible_imp<__tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};
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template <> |
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struct __tuple_convertible_imp<__tuple_types<>, __tuple_types<> > |
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: public true_type {};
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template <bool, class, class> |
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struct __tuple_convertible_apply : public false_type {};
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template <class _Tp, class _Up> |
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struct __tuple_convertible_apply<true, _Tp, _Up> |
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: public __tuple_convertible_imp< |
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typename __make_tuple_types<_Tp>::type |
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, typename __make_tuple_types<_Up>::type |
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> |
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{};
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template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value, |
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bool = __tuple_like<_Up>::value> |
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struct __tuple_convertible |
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: public false_type {};
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template <class _Tp, class _Up> |
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struct __tuple_convertible<_Tp, _Up, true, true> |
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: public __tuple_convertible_apply<tuple_size<typename remove_reference<_Tp>::type>::value == |
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tuple_size<_Up>::value, _Tp, _Up> |
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{};
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// __tuple_constructible |
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template <class, class> |
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struct __tuple_constructible_imp : public false_type {};
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template <class _Tp0, class ..._Tp, class _Up0, class ..._Up> |
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struct __tuple_constructible_imp<__tuple_types<_Tp0, _Tp...>, __tuple_types<_Up0, _Up...> > |
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: public integral_constant<bool, |
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is_constructible<_Up0, _Tp0>::value && |
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__tuple_constructible_imp<__tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};
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template <> |
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struct __tuple_constructible_imp<__tuple_types<>, __tuple_types<> > |
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: public true_type {};
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template <bool _SameSize, class, class> |
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struct __tuple_constructible_apply : public false_type {};
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template <class _Tp, class _Up> |
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struct __tuple_constructible_apply<true, _Tp, _Up> |
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: public __tuple_constructible_imp< |
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typename __make_tuple_types<_Tp>::type |
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, typename __make_tuple_types<_Up>::type |
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> |
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{};
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template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value, |
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bool = __tuple_like<_Up>::value> |
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struct __tuple_constructible |
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: public false_type {};
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template <class _Tp, class _Up> |
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struct __tuple_constructible<_Tp, _Up, true, true> |
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: public __tuple_constructible_apply<tuple_size<typename remove_reference<_Tp>::type>::value == |
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tuple_size<_Up>::value, _Tp, _Up> |
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{};
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// __tuple_assignable |
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template <class, class> |
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struct __tuple_assignable_imp : public false_type {};
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template <class _Tp0, class ..._Tp, class _Up0, class ..._Up> |
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struct __tuple_assignable_imp<__tuple_types<_Tp0, _Tp...>, __tuple_types<_Up0, _Up...> > |
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: public integral_constant<bool, |
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is_assignable<_Up0&, _Tp0>::value && |
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__tuple_assignable_imp<__tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};
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template <> |
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struct __tuple_assignable_imp<__tuple_types<>, __tuple_types<> > |
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: public true_type {};
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|
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template <bool, class, class> |
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struct __tuple_assignable_apply : public false_type {};
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template <class _Tp, class _Up> |
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struct __tuple_assignable_apply<true, _Tp, _Up> |
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: __tuple_assignable_imp< |
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typename __make_tuple_types<_Tp>::type |
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, typename __make_tuple_types<_Up>::type |
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> |
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{};
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|
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template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value, |
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bool = __tuple_like<_Up>::value> |
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struct __tuple_assignable |
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: public false_type {};
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|
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template <class _Tp, class _Up> |
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struct __tuple_assignable<_Tp, _Up, true, true> |
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: public __tuple_assignable_apply<tuple_size<typename remove_reference<_Tp>::type>::value == |
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tuple_size<_Up>::value, _Tp, _Up> |
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{};
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#endif // _LIBCPP_HAS_NO_VARIADICS |
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_LIBCPP_END_NAMESPACE_STD |
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#endif // _LIBCPP___TUPLE |