LCOM1920-T02G10

// -*- C++ -*-

//===----------------------------------------------------------------------===//

//

//                     The LLVM Compiler Infrastructure

//

// This file is dual licensed under the MIT and the University of Illinois Open

// Source Licenses. See LICENSE.TXT for details.

//

//===----------------------------------------------------------------------===//

#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> class _LIBCPP_TYPE_VIS_ONLY tuple_size;

template <class _Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_size<const _Tp>

    : public tuple_size<_Tp> {};

template <class _Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_size<volatile _Tp>

    : public tuple_size<_Tp> {};

template <class _Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_size<const volatile _Tp>

    : public tuple_size<_Tp> {};

template <size_t _Ip, class _Tp> class _LIBCPP_TYPE_VIS_ONLY tuple_element;

template <size_t _Ip, class _Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, const _Tp>

{

public:

    typedef typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type;

};

template <size_t _Ip, class _Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, volatile _Tp>

{

public:

    typedef typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type;

};

template <size_t _Ip, class _Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, const volatile _Tp>

{

public:

    typedef 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

#if !defined(_LIBCPP_HAS_NO_VARIADICS)

template <class ..._Tp> class _LIBCPP_TYPE_VIS_ONLY tuple;

template <class... _Tp> struct __tuple_like<tuple<_Tp...> > : true_type {};

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;

#endif

// pair specializations

template <class _T1, class _T2> struct _LIBCPP_TYPE_VIS_ONLY pair;

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;

#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)

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;

#endif

// array specializations

template <class _Tp, size_t _Size> struct _LIBCPP_TYPE_VIS_ONLY 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;

#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)

template <size_t _Ip, class _Tp, size_t _Size>

_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11

_Tp&&

get(array<_Tp, _Size>&&) _NOEXCEPT;

#endif

#if !defined(_LIBCPP_HAS_NO_VARIADICS)

// __lazy_and

template <bool _Last, class ..._Preds>

struct __lazy_and_impl;

template <class ..._Preds>

struct __lazy_and_impl<false, _Preds...> : false_type {};

template <>

struct __lazy_and_impl<true> : true_type {};

template <class _Pred>

struct __lazy_and_impl<true, _Pred> : integral_constant<bool, _Pred::type::value> {};

template <class _Hp, class ..._Tp>

struct __lazy_and_impl<true, _Hp, _Tp...> : __lazy_and_impl<_Hp::type::value, _Tp...> {};

template <class _P1, class ..._Pr>

struct __lazy_and : __lazy_and_impl<_P1::type::value, _Pr...> {};

// __lazy_not

template <class _Pred>

struct __lazy_not : integral_constant<bool, !_Pred::type::value> {};

// __make_tuple_indices

template <size_t...> struct __tuple_indices {};

template <size_t _Sp, class _IntTuple, size_t _Ep>

struct __make_indices_imp;

template <size_t _Sp, size_t ..._Indices, size_t _Ep>

struct __make_indices_imp<_Sp, __tuple_indices<_Indices...>, _Ep>

{

    typedef typename __make_indices_imp<_Sp+1, __tuple_indices<_Indices..., _Sp>, _Ep>::type type;

};

template <size_t _Ep, size_t ..._Indices>

struct __make_indices_imp<_Ep, __tuple_indices<_Indices...>, _Ep>

{

    typedef __tuple_indices<_Indices...> type;

};

template <size_t _Ep, size_t _Sp = 0>

struct __make_tuple_indices

{

    static_assert(_Sp <= _Ep, "__make_tuple_indices input error");

    typedef typename __make_indices_imp<_Sp, __tuple_indices<>, _Ep>::type type;

};

// __tuple_types

template <class ..._Tp> struct __tuple_types {};

template <size_t _Ip>

class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, __tuple_types<> >

{

public:

    static_assert(_Ip == 0, "tuple_element index out of range");

    static_assert(_Ip != 0, "tuple_element index out of range");

};

template <class _Hp, class ..._Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_element<0, __tuple_types<_Hp, _Tp...> >

{

public:

    typedef _Hp type;

};

template <size_t _Ip, class _Hp, class ..._Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_element<_Ip, __tuple_types<_Hp, _Tp...> >

{

public:

    typedef typename tuple_element<_Ip-1, __tuple_types<_Tp...> >::type type;

};

template <class ..._Tp>

class _LIBCPP_TYPE_VIS_ONLY tuple_size<__tuple_types<_Tp...> >

    : public integral_constant<size_t, sizeof...(_Tp)>

{

};

template <class... _Tp> struct __tuple_like<__tuple_types<_Tp...> > : true_type {};

// __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 _Tp, size_t _Sp, size_t _Ep>

struct __make_tuple_types_imp;

template <class ..._Types, class _Tp, size_t _Sp, size_t _Ep>

struct __make_tuple_types_imp<__tuple_types<_Types...>, _Tp, _Sp, _Ep>

{

    typedef typename remove_reference<_Tp>::type _Tpr;

    typedef typename __make_tuple_types_imp<__tuple_types<_Types...,

                                            typename conditional<is_lvalue_reference<_Tp>::value,

                                                typename tuple_element<_Sp, _Tpr>::type&,

                                                typename tuple_element<_Sp, _Tpr>::type>::type>,

                                            _Tp, _Sp+1, _Ep>::type type;

};

template <class ..._Types, class _Tp, size_t _Ep>

struct __make_tuple_types_imp<__tuple_types<_Types...>, _Tp, _Ep, _Ep>

{

    typedef __tuple_types<_Types...> type;

};

template <class _Tp, size_t _Ep = tuple_size<typename remove_reference<_Tp>::type>::value, size_t _Sp = 0>

struct __make_tuple_types

{

    static_assert(_Sp <= _Ep, "__make_tuple_types input error");

    typedef typename __make_tuple_types_imp<__tuple_types<>, _Tp, _Sp, _Ep>::type type;

};

// __tuple_convertible

template <class, class>

struct __tuple_convertible_imp : public false_type {};

template <class _Tp0, class ..._Tp, class _Up0, class ..._Up>

struct __tuple_convertible_imp<__tuple_types<_Tp0, _Tp...>, __tuple_types<_Up0, _Up...> >

    : public integral_constant<bool,

                               is_convertible<_Tp0, _Up0>::value &&

                               __tuple_convertible_imp<__tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};

template <>

struct __tuple_convertible_imp<__tuple_types<>, __tuple_types<> >

    : public true_type {};

template <bool, class, class>

struct __tuple_convertible_apply : public false_type {};

template <class _Tp, class _Up>

struct __tuple_convertible_apply<true, _Tp, _Up>

  : public __tuple_convertible_imp<

      typename __make_tuple_types<_Tp>::type

    , typename __make_tuple_types<_Up>::type

    >

{};

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_convertible_apply<tuple_size<typename remove_reference<_Tp>::type>::value ==

                                     tuple_size<_Up>::value, _Tp, _Up>

{};

// __tuple_constructible

template <class, class>

struct __tuple_constructible_imp : public false_type {};

template <class _Tp0, class ..._Tp, class _Up0, class ..._Up>

struct __tuple_constructible_imp<__tuple_types<_Tp0, _Tp...>, __tuple_types<_Up0, _Up...> >

    : public integral_constant<bool,

                               is_constructible<_Up0, _Tp0>::value &&

                               __tuple_constructible_imp<__tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};

template <>

struct __tuple_constructible_imp<__tuple_types<>, __tuple_types<> >

    : public true_type {};

template <bool _SameSize, class, class>

struct __tuple_constructible_apply : public false_type {};

template <class _Tp, class _Up>

struct __tuple_constructible_apply<true, _Tp, _Up>

  : public __tuple_constructible_imp<

      typename __make_tuple_types<_Tp>::type

    , typename __make_tuple_types<_Up>::type

    >

{};

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_constructible_apply<tuple_size<typename remove_reference<_Tp>::type>::value ==

                                     tuple_size<_Up>::value, _Tp, _Up>

{};

// __tuple_assignable

template <class, class>

struct __tuple_assignable_imp : public false_type {};

template <class _Tp0, class ..._Tp, class _Up0, class ..._Up>

struct __tuple_assignable_imp<__tuple_types<_Tp0, _Tp...>, __tuple_types<_Up0, _Up...> >

    : public integral_constant<bool,

                               is_assignable<_Up0&, _Tp0>::value &&

                               __tuple_assignable_imp<__tuple_types<_Tp...>, __tuple_types<_Up...> >::value> {};

template <>

struct __tuple_assignable_imp<__tuple_types<>, __tuple_types<> >

    : public true_type {};

template <bool, class, class>

struct __tuple_assignable_apply : public false_type {};

template <class _Tp, class _Up>

struct __tuple_assignable_apply<true, _Tp, _Up>

  : __tuple_assignable_imp<

      typename __make_tuple_types<_Tp>::type

    , typename __make_tuple_types<_Up>::type

    >

{};

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_assignable_apply<tuple_size<typename remove_reference<_Tp>::type>::value ==

                                    tuple_size<_Up>::value, _Tp, _Up>

{};

#endif  // _LIBCPP_HAS_NO_VARIADICS

_LIBCPP_END_NAMESPACE_STD

#endif  // _LIBCPP___TUPLE