306 lines
10 KiB
C++
306 lines
10 KiB
C++
// -*- 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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#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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#ifdef _LIBCPP_HAS_NO_VARIADICS
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#include <__tuple_03>
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#else // _LIBCPP_HAS_NO_VARIADICS
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Tp> class _LIBCPP_TYPE_VIS tuple_size;
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template <class _Tp>
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class _LIBCPP_TYPE_VIS tuple_size<const _Tp>
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: public tuple_size<_Tp> {};
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template <class _Tp>
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class _LIBCPP_TYPE_VIS tuple_size<volatile _Tp>
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: public tuple_size<_Tp> {};
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template <class _Tp>
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class _LIBCPP_TYPE_VIS 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 tuple_element;
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template <size_t _Ip, class _Tp>
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class _LIBCPP_TYPE_VIS 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 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 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> class _LIBCPP_TYPE_VIS tuple;
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template <class _T1, class _T2> struct _LIBCPP_TYPE_VIS pair;
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template <class _Tp, size_t _Size> struct _LIBCPP_TYPE_VIS array;
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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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template <class... _Tp> struct __tuple_like<tuple<_Tp...> > : true_type {};
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template <class _T1, class _T2> struct __tuple_like<pair<_T1, _T2> > : true_type {};
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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>
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_LIBCPP_INLINE_VISIBILITY
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typename tuple_element<_Ip, tuple<_Tp...> >::type&
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get(tuple<_Tp...>&) _NOEXCEPT;
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template <size_t _Ip, class ..._Tp>
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_LIBCPP_INLINE_VISIBILITY
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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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template <size_t _Ip, class ..._Tp>
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_LIBCPP_INLINE_VISIBILITY
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typename tuple_element<_Ip, tuple<_Tp...> >::type&&
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get(tuple<_Tp...>&&) _NOEXCEPT;
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template <size_t _Ip, class _T1, class _T2>
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_LIBCPP_INLINE_VISIBILITY
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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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template <size_t _Ip, class _T1, class _T2>
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_LIBCPP_INLINE_VISIBILITY
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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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template <size_t _Ip, class _T1, class _T2>
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_LIBCPP_INLINE_VISIBILITY
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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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template <size_t _Ip, class _Tp, size_t _Size>
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_LIBCPP_INLINE_VISIBILITY
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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
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const _Tp&
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get(const array<_Tp, _Size>&) _NOEXCEPT;
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template <size_t _Ip, class _Tp, size_t _Size>
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_LIBCPP_INLINE_VISIBILITY
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_Tp&&
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get(array<_Tp, _Size>&&) _NOEXCEPT;
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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 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 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 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 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 <bool, class _Tp, class _Up>
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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<true, __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<true, __tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};
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template <>
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struct __tuple_convertible_imp<true, __tuple_types<>, __tuple_types<> >
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: public true_type {};
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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_imp<tuple_size<typename remove_reference<_Tp>::type>::value ==
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tuple_size<_Up>::value,
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typename __make_tuple_types<_Tp>::type, typename __make_tuple_types<_Up>::type>
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{};
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// __tuple_constructible
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template <bool, class _Tp, class _Up>
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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<true, __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<true, __tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};
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template <>
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struct __tuple_constructible_imp<true, __tuple_types<>, __tuple_types<> >
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: public true_type {};
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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_imp<tuple_size<typename remove_reference<_Tp>::type>::value ==
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tuple_size<_Up>::value,
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typename __make_tuple_types<_Tp>::type, typename __make_tuple_types<_Up>::type>
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{};
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// __tuple_assignable
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template <bool, class _Tp, class _Up>
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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<true, __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<true, __tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};
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template <>
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struct __tuple_assignable_imp<true, __tuple_types<>, __tuple_types<> >
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: public true_type {};
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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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template <class _Tp, class _Up>
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struct __tuple_assignable<_Tp, _Up, true, true>
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: public __tuple_assignable_imp<tuple_size<typename remove_reference<_Tp>::type>::value ==
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tuple_size<_Up>::value,
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typename __make_tuple_types<_Tp>::type, typename __make_tuple_types<_Up>::type>
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{};
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_HAS_NO_VARIADICS
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#endif // _LIBCPP___TUPLE
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