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  1. // -*- C++ -*-
  2.  
  3. // Copyright (C) 2005-2013 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 3, 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. // Under Section 7 of GPL version 3, you are granted additional
  17. // permissions described in the GCC Runtime Library Exception, version
  18. // 3.1, as published by the Free Software Foundation.
  19.  
  20. // You should have received a copy of the GNU General Public License and
  21. // a copy of the GCC Runtime Library Exception along with this program;
  22. // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23. // <http://www.gnu.org/licenses/>.
  24.  
  25. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  26.  
  27. // Permission to use, copy, modify, sell, and distribute this software
  28. // is hereby granted without fee, provided that the above copyright
  29. // notice appears in all copies, and that both that copyright notice
  30. // and this permission notice appear in supporting documentation. None
  31. // of the above authors, nor IBM Haifa Research Laboratories, make any
  32. // representation about the suitability of this software for any
  33. // purpose. It is provided "as is" without express or implied
  34. // warranty.
  35.  
  36. /**
  37.  * @file unordered_iterator/const_iterator.hpp
  38.  * Contains an iterator class used for const ranging over the elements of the
  39.  * table.
  40.  */
  41.  
  42. /// Const range-type iterator.
  43. class const_iterator_
  44. : public point_const_iterator_
  45. {
  46. public:
  47.   /// Category.
  48.   typedef std::forward_iterator_tag iterator_category;
  49.  
  50.   /// Difference type.
  51.   typedef typename _Alloc::difference_type difference_type;
  52.  
  53.   /// Iterator's value type.
  54.   typedef value_type_ value_type;
  55.  
  56.   /// Iterator's pointer type.
  57.   typedef pointer_ pointer;
  58.  
  59.   /// Iterator's const pointer type.
  60.   typedef const_pointer_ const_pointer;
  61.  
  62.   /// Iterator's reference type.
  63.   typedef reference_ reference;
  64.  
  65.   /// Iterator's const reference type.
  66.   typedef const_reference_ const_reference;
  67.  
  68.   /// Default constructor.
  69.   const_iterator_() : m_p_tbl(0)
  70.   { }
  71.  
  72.   /// Increments.
  73.   const_iterator_&
  74.   operator++()
  75.   {
  76.     m_p_tbl->inc_it_state(base_type::m_p_value, m_pos);
  77.     return *this;
  78.   }
  79.  
  80.   /// Increments.
  81.   const_iterator_
  82.   operator++(int)
  83.   {
  84.     const_iterator_ ret =* this;
  85.     m_p_tbl->inc_it_state(base_type::m_p_value, m_pos);
  86.     return ret;
  87.   }
  88.  
  89. protected:
  90.   typedef point_const_iterator_ base_type;
  91.  
  92.   /**
  93.    *  Constructor used by the table to initiate the generalized
  94.    *      pointer and position (e.g., this is called from within a find()
  95.    *      of a table.
  96.    * */
  97.   const_iterator_(const_pointer_ p_value,  PB_DS_GEN_POS pos,
  98.                   const PB_DS_CLASS_C_DEC* p_tbl)
  99.   : point_const_iterator_(p_value), m_p_tbl(p_tbl), m_pos(pos)
  100.   { }
  101.  
  102.   /**
  103.    *  Pointer to the table object which created the iterator (used for
  104.    *      incrementing its position.
  105.    * */
  106.   const PB_DS_CLASS_C_DEC* m_p_tbl;
  107.  
  108.   PB_DS_GEN_POS m_pos;
  109.  
  110.   friend class PB_DS_CLASS_C_DEC;
  111. };
  112.