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// class template tuple -*- C++ -*-

// Copyright (C) 2004, 2005 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 2, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// As a special exception, you may use this file as part of a free software

// library without restriction.  Specifically, if other files instantiate

// templates or use macros or inline functions from this file, or you compile

// this file and link it with other files to produce an executable, this

// file does not by itself cause the resulting executable to be covered by

// the GNU General Public License.  This exception does not however

// invalidate any other reasons why the executable file might be covered by

// the GNU General Public License.

/** @file

 *  This is an internal header file, included by other library headers.

 *  You should not attempt to use it directly.

 */

// Chris Jefferson <chris@bubblescope.net>

/// @brief class tuple_size

template<_GLIBCXX_TEMPLATE_PARAMS>

  struct tuple_size<tuple<_GLIBCXX_TEMPLATE_ARGS> >

  { static const int value = _GLIBCXX_NUM_ARGS; };

template<_GLIBCXX_TEMPLATE_PARAMS>

#ifdef _GLIBCXX_LAST_INCLUDE

  class tuple

#else

  class tuple<_GLIBCXX_TEMPLATE_ARGS>

#endif

  {

    _GLIBCXX_BIND_MEMBERS

  public:

    tuple()

    { }

#if _GLIBCXX_NUM_ARGS == 2

    template<typename _U1, typename _U2>

      tuple(const std::pair<_U1, _U2>& __u) :

      _M_arg1(__u.first), _M_arg2(__u.second)

      { }

    template<typename _U1, typename _U2>

      tuple&

      operator=(const std::pair<_U1, _U2>& __u)

      {

        _M_arg1 = __u.first;

        _M_arg2 = __u.second;

        return *this;

      }

#endif

#if _GLIBCXX_NUM_ARGS > 0

    explicit tuple(_GLIBCXX_TUPLE_ADD_CREF) :

      _GLIBCXX_BIND_MEMBERS_INIT

    { }

    template<_GLIBCXX_TEMPLATE_PARAMS_U>

      tuple(const tuple<_GLIBCXX_TEMPLATE_ARGS_U>& __in) :

      _GLIBCXX_TUPLE_COPY_INIT

    { }

    template<_GLIBCXX_TEMPLATE_PARAMS_U>

      tuple&

      operator=(const tuple<_GLIBCXX_TEMPLATE_ARGS_U>& __in)

      {

        _GLIBCXX_TUPLE_ASSIGN

        return *this;

      }

    tuple(const tuple& __in) :

      _GLIBCXX_TUPLE_COPY_INIT

    { }

#else

    tuple(const tuple&)

    { }

#endif

    tuple&

    operator=(const tuple& __in __attribute__((__unused__)) )

    {

      _GLIBCXX_TUPLE_ASSIGN

        return *this;

    }

    template<int __i, typename __Type>

      friend class __get_helper;

    template<typename, typename, typename, typename, typename,

             typename, typename, typename, typename, typename>

      friend class tuple;

  };

#ifndef _GLIBCXX_LAST_INCLUDE

template<typename _Tp>

    struct __get_helper<_GLIBCXX_NUM_ARGS, _Tp>

    {

      static typename __add_ref<typename tuple_element<_GLIBCXX_NUM_ARGS,

                                                       _Tp>::type>::type

      get_value(_Tp& __in)

      { return __in._GLIBCXX_CAT(_M_arg,_GLIBCXX_NUM_ARGS_PLUS_1); }

      static typename __add_c_ref<typename tuple_element<_GLIBCXX_NUM_ARGS,

                                                         _Tp>::type>::type

      get_value(const _Tp& __in)

      { return __in._GLIBCXX_CAT(_M_arg,_GLIBCXX_NUM_ARGS_PLUS_1); }

    };

/// @brief class tuple_element

template<typename _T1, typename _T2, typename _T3, typename _T4,

         typename _T5, typename _T6, typename _T7, typename _T8,

         typename _T9, typename _T10>

   struct tuple_element<_GLIBCXX_NUM_ARGS, tuple<_T1, _T2, _T3, _T4,

                                                _T5, _T6, _T7, _T8, _T9,

                                                _T10> >

  { typedef _GLIBCXX_T_NUM_ARGS_PLUS_1 type; };

#endif

#if _GLIBCXX_NUM_ARGS == 0

tuple<>

inline make_tuple()

{ return tuple<>(); }

tuple<>

inline tie()

{ return tuple<>(); }

#else

template<_GLIBCXX_TEMPLATE_PARAMS>

  typename __stripped_tuple_type<_GLIBCXX_TEMPLATE_ARGS>::__type

  inline make_tuple(_GLIBCXX_PARAMS)

  {

    return typename __stripped_tuple_type<_GLIBCXX_TEMPLATE_ARGS>::

      __type(_GLIBCXX_ARGS);

  }

template<_GLIBCXX_TEMPLATE_PARAMS>

  tuple<_GLIBCXX_REF_TEMPLATE_ARGS>

  inline tie(_GLIBCXX_REF_PARAMS)

  { return make_tuple(_GLIBCXX_REF_WRAP_PARAMS); }

#endif