mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/unordered_iterator/const_iterator.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 terms
   7 // of the GNU General Public License as published by the Free Software
   8 // Foundation; either version 2, or (at your option) any later
   9 // version.
  10
  11 // This library is distributed in the hope that it will be useful, but
  12 // WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 // General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
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  40 // warranty.
  41
  42 /**
  43  * @file const_iterator.hpp
  44  * Contains an iterator class used for const ranging over the elements of the
  45  *     table.
  46  */
  47
  48 // Const range-type iterator.
  49 class const_iterator_ :
  50   public const_point_iterator_
  51
  52 {
  53
  54 public:
  55
  56   // Category.
  57   typedef std::forward_iterator_tag iterator_category;
  58
  59   // Difference type.
  60   typedef typename Allocator::difference_type difference_type;
  61
  62   // Iterator's value type.
  63   typedef value_type_ value_type;
  64
  65   // Iterator's pointer type.
  66   typedef pointer_ pointer;
  67
  68   // Iterator's const pointer type.
  69   typedef const_pointer_ const_pointer;
  70
  71   // Iterator's reference type.
  72   typedef reference_ reference;
  73
  74   // Iterator's const reference type.
  75   typedef const_reference_ const_reference;
  76
  77 public:
  78
  79   // Default constructor.
  80   inline
  81   const_iterator_()
  82
  83     : m_p_tbl(NULL)
  84   { }
  85
  86   // Increments.
  87   inline const_iterator_&
  88   operator++()
  89   {
  90     m_p_tbl->inc_it_state(base_type::m_p_value, m_pos);
  91
  92     return (*this);
  93   }
  94
  95   // Increments.
  96   inline const_iterator_
  97   operator++(int)
  98   {
  99     const_iterator_ ret =* this;
 100
 101     m_p_tbl->inc_it_state(base_type::m_p_value, m_pos);
 102
 103     return (ret);
 104   }
 105
 106 protected:
 107
 108   typedef const_point_iterator_ base_type;
 109
 110 protected:
 111
 112   /**
 113    *  Constructor used by the table to initiate the generalized
 114    *      pointer and position (e.g., this is called from within a find()
 115    *      of a table.
 116    * */
 117   inline
 118   const_iterator_(const_pointer_ p_value,  PB_DS_GEN_POS pos,  const PB_DS_CLASS_C_DEC* p_tbl) : const_point_iterator_(p_value),
 119                                                                                                  m_p_tbl(p_tbl),
 120                                                                                                  m_pos(pos)
 121   { }
 122
 123 protected:
 124
 125   /**
 126    *  Pointer to the table object which created the iterator (used for
 127    *      incrementing its position.
 128    * */
 129   const PB_DS_CLASS_C_DEC* m_p_tbl;
 130
 131   PB_DS_GEN_POS m_pos;
 132
 133   friend class PB_DS_CLASS_C_DEC;
 134 };
 135