gnu/dist/gcc4/libstdc++-v3/include/tr1/tuple_iterate.h

   1 // class template tuple -*- C++ -*-
   2
   3 // Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 /** @file
  31  *  This is an internal header file, included by other library headers.
  32  *  You should not attempt to use it directly.
  33  */
  34
  35 // Chris Jefferson <chris@bubblescope.net>
  36
  37 /// @brief class tuple_size
  38 template<_GLIBCXX_TEMPLATE_PARAMS>
  39   struct tuple_size<tuple<_GLIBCXX_TEMPLATE_ARGS> >
  40   { static const int value = _GLIBCXX_NUM_ARGS; };
  41
  42 template<_GLIBCXX_TEMPLATE_PARAMS>
  43 #ifdef _GLIBCXX_LAST_INCLUDE
  44   class tuple
  45 #else
  46   class tuple<_GLIBCXX_TEMPLATE_ARGS>
  47 #endif
  48   {
  49     _GLIBCXX_BIND_MEMBERS
  50
  51   public:
  52     tuple()
  53     { }
  54
  55 #if _GLIBCXX_NUM_ARGS == 2
  56     template<typename _U1, typename _U2>
  57       tuple(const std::pair<_U1, _U2>& __u) :
  58       _M_arg1(__u.first), _M_arg2(__u.second)
  59       { }
  60
  61     template<typename _U1, typename _U2>
  62       tuple&
  63       operator=(const std::pair<_U1, _U2>& __u)
  64       {
  65         _M_arg1 = __u.first;
  66         _M_arg2 = __u.second;
  67         return *this;
  68       }
  69 #endif
  70
  71 #if _GLIBCXX_NUM_ARGS > 0
  72     explicit tuple(_GLIBCXX_TUPLE_ADD_CREF) :
  73       _GLIBCXX_BIND_MEMBERS_INIT
  74     { }
  75
  76     template<_GLIBCXX_TEMPLATE_PARAMS_U>
  77       tuple(const tuple<_GLIBCXX_TEMPLATE_ARGS_U>& __in) :
  78       _GLIBCXX_TUPLE_COPY_INIT
  79     { }
  80
  81
  82     template<_GLIBCXX_TEMPLATE_PARAMS_U>
  83       tuple&
  84       operator=(const tuple<_GLIBCXX_TEMPLATE_ARGS_U>& __in)
  85       {
  86         _GLIBCXX_TUPLE_ASSIGN
  87         return *this;
  88       }
  89
  90     tuple(const tuple& __in) :
  91       _GLIBCXX_TUPLE_COPY_INIT
  92     { }
  93
  94 #else
  95
  96     tuple(const tuple&)
  97     { }
  98
  99 #endif
 100
 101     tuple&
 102     operator=(const tuple& __in __attribute__((__unused__)) )
 103     {
 104       _GLIBCXX_TUPLE_ASSIGN
 105         return *this;
 106     }
 107
 108     template<int __i, typename __Type>
 109       friend class __get_helper;
 110
 111     template<typename, typename, typename, typename, typename,
 112              typename, typename, typename, typename, typename>
 113       friend class tuple;
 114   };
 115
 116 #ifndef _GLIBCXX_LAST_INCLUDE
 117
 118 template<typename _Tp>
 119     struct __get_helper<_GLIBCXX_NUM_ARGS, _Tp>
 120     {
 121       static typename __add_ref<typename tuple_element<_GLIBCXX_NUM_ARGS,
 122                                                        _Tp>::type>::type
 123       get_value(_Tp& __in)
 124       { return __in._GLIBCXX_CAT(_M_arg,_GLIBCXX_NUM_ARGS_PLUS_1); }
 125
 126       static typename __add_c_ref<typename tuple_element<_GLIBCXX_NUM_ARGS,
 127                                                          _Tp>::type>::type
 128       get_value(const _Tp& __in)
 129       { return __in._GLIBCXX_CAT(_M_arg,_GLIBCXX_NUM_ARGS_PLUS_1); }
 130     };
 131
 132 /// @brief class tuple_element
 133 template<typename _T1, typename _T2, typename _T3, typename _T4,
 134          typename _T5, typename _T6, typename _T7, typename _T8,
 135          typename _T9, typename _T10>
 136    struct tuple_element<_GLIBCXX_NUM_ARGS, tuple<_T1, _T2, _T3, _T4,
 137                                                 _T5, _T6, _T7, _T8, _T9,
 138                                                 _T10> >
 139   { typedef _GLIBCXX_T_NUM_ARGS_PLUS_1 type; };
 140
 141 #endif
 142 #if _GLIBCXX_NUM_ARGS == 0
 143
 144 tuple<>
 145 inline make_tuple()
 146 { return tuple<>(); }
 147
 148 tuple<>
 149 inline tie()
 150 { return tuple<>(); }
 151 #else
 152
 153 template<_GLIBCXX_TEMPLATE_PARAMS>
 154   typename __stripped_tuple_type<_GLIBCXX_TEMPLATE_ARGS>::__type
 155   inline make_tuple(_GLIBCXX_PARAMS)
 156   {
 157     return typename __stripped_tuple_type<_GLIBCXX_TEMPLATE_ARGS>::
 158       __type(_GLIBCXX_ARGS);
 159   }
 160
 161 template<_GLIBCXX_TEMPLATE_PARAMS>
 162   tuple<_GLIBCXX_REF_TEMPLATE_ARGS>
 163   inline tie(_GLIBCXX_REF_PARAMS)
 164   { return make_tuple(_GLIBCXX_REF_WRAP_PARAMS); }
 165 #endif
 166