libstdc++-v3/include/ext/pb_assoc/detail/value_type_adapter/iterator.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  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 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file it_.hpp
  42  * Contains an it_ for an adapter of mapping levels.
  43  */
  44
  45 #define PB_ASSOC_IT_C_DEC \
  46         it_< \
  47                 It0, \
  48                 It1, \
  49                 Has_Data, \
  50                 Const>
  51
  52 #define PB_ASSOC_OIT_T_DEC \
  53         template<class OIt0, class OIt1, bool OHas_Data, bool OConst>
  54
  55 #define PB_ASSOC_OIT_C_DEC \
  56         it_< \
  57                 OIt0, \
  58                 OIt1, \
  59                 OHas_Data, \
  60                 OConst>
  61
  62 template<class It0, class It1, bool Has_Data, bool Const>
  63 class it_
  64 {
  65 public:
  66
  67   typedef typename it_value_type_traits_t::value_type value_type;
  68
  69   typedef typename it_value_type_traits_t::reference reference;
  70
  71   typedef
  72   typename it_value_type_traits_t::const_reference
  73   const_reference;
  74
  75   typedef typename it_value_type_traits_t::pointer pointer;
  76
  77   typedef typename it_value_type_traits_t::const_pointer const_pointer;
  78
  79 public:
  80   inline
  81   it_(It0 it0 = It0(),
  82       It0 end_it0 = It0(),
  83       It1 it1 = It1()) : m_it0(it0),
  84                          m_end_it0(end_it0),
  85                          m_it1(it1)
  86   { }
  87
  88   inline
  89   it_(const PB_ASSOC_IT_C_DEC& r_other) : m_it0(r_other.m_it0),
  90                                           m_end_it0(r_other.m_end_it0),
  91                                           m_it1(r_other.m_it1)
  92   { }
  93
  94   PB_ASSOC_OIT_T_DEC
  95   inline
  96   it_(const PB_ASSOC_OIT_C_DEC& r_other) : m_it0(r_other.m_it0),
  97                                            m_end_it0(r_other.m_end_it0),
  98                                            m_it1(r_other.m_it1)
  99   { }
 100
 101   inline bool
 102   operator==(const PB_ASSOC_IT_C_DEC& r_other) const
 103   {
 104     if (m_it0 != r_other.m_it0)
 105       return (false);
 106
 107     if (m_it0 == m_end_it0)
 108       return (true);
 109
 110     return (m_it1 == r_other.m_it1);
 111   }
 112
 113   inline bool
 114   operator!=(const PB_ASSOC_IT_C_DEC& r_other) const
 115   {
 116     return (!operator==(r_other));
 117   }
 118
 119   inline PB_ASSOC_IT_C_DEC&
 120   operator++()
 121   {
 122     ++m_it1;
 123
 124     if (m_it1 == m_it0->second.end())
 125       do
 126         {
 127           ++m_it0;
 128         }
 129       while (m_it0 != m_end_it0&&  m_it0->second.empty());
 130
 131     if (m_it0 != m_end_it0&&  !m_it0->second.empty())
 132       m_it1 = m_it0->second.begin();
 133
 134     return (*this);
 135   }
 136
 137   inline PB_ASSOC_IT_C_DEC
 138   operator++(int)
 139   {
 140     PB_ASSOC_IT_C_DEC ret =* this;
 141
 142     operator++();
 143
 144     return (ret);
 145   }
 146
 147   inline const_pointer
 148   operator->() const
 149   {
 150     it_value_type_traits_t::make_valid(m_value_type_holder, m_it0->first, * m_it1);
 151
 152     return (it_value_type_traits_t::recast(m_value_type_holder));
 153   }
 154
 155   inline pointer
 156   operator->()
 157   {
 158     // Tmp Ami PB_ASSOC_STATIC_ASSERT(non_const, !Const);
 159
 160     it_value_type_traits_t::make_valid(m_value_type_holder, m_it0->first, * m_it1);
 161
 162     return (it_value_type_traits_t::recast(m_value_type_holder));
 163   }
 164
 165   inline const_reference
 166   operator*() const
 167   {
 168     return (*operator->());
 169   }
 170
 171   inline reference
 172   operator*()
 173   {
 174     PB_ASSOC_STATIC_ASSERT(non_const, !Const);
 175
 176     return (*operator->());
 177   }
 178
 179 public:
 180   mutable It0 m_it0;
 181   It0 m_end_it0;
 182
 183   mutable It1 m_it1;
 184
 185   int_to_type<Has_Data> m_has_data;
 186
 187 private:
 188   mutable typename it_value_type_traits_t::value_type_holder m_value_type_holder;
 189 };
 190
 191 #undef PB_ASSOC_IT_C_DEC
 192
 193 #undef PB_ASSOC_OIT_T_DEC
 194
 195 #undef PB_ASSOC_OIT_C_DEC
 196