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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 binary_heap_/const_iterator.hpp
  38.  * Contains an iterator class returned by the table's const find and insert
  39.  *     methods.
  40.  */
  41.  
  42. #ifndef PB_DS_BINARY_HEAP_CONST_ITERATOR_HPP
  43. #define PB_DS_BINARY_HEAP_CONST_ITERATOR_HPP
  44.  
  45. #include <ext/pb_ds/detail/binary_heap_/point_const_iterator.hpp>
  46. #include <debug/debug.h>
  47.  
  48. namespace __gnu_pbds
  49. {
  50.   namespace detail
  51.   {
  52. #define PB_DS_BIN_HEAP_CIT_BASE \
  53.     binary_heap_point_const_iterator_<Value_Type, Entry, Simple, _Alloc>
  54.  
  55.     /// Const point-type iterator.
  56.     template<typename Value_Type,
  57.              typename Entry,
  58.              bool Simple,
  59.              typename _Alloc>
  60.     class binary_heap_const_iterator_ : public PB_DS_BIN_HEAP_CIT_BASE
  61.     {
  62.     private:
  63.       typedef PB_DS_BIN_HEAP_CIT_BASE                   base_type;
  64.       typedef typename base_type::entry_pointer         entry_pointer;
  65.  
  66.     public:
  67.       /// Category.
  68.       typedef std::forward_iterator_tag                 iterator_category;
  69.  
  70.       /// Difference type.
  71.       typedef typename _Alloc::difference_type          difference_type;
  72.  
  73.       /// Iterator's value type.
  74.       typedef typename base_type::value_type            value_type;
  75.  
  76.       /// Iterator's pointer type.
  77.       typedef typename base_type::pointer               pointer;
  78.  
  79.       /// Iterator's const pointer type.
  80.       typedef typename base_type::const_pointer         const_pointer;
  81.  
  82.       /// Iterator's reference type.
  83.       typedef typename base_type::reference             reference;
  84.  
  85.       /// Iterator's const reference type.
  86.       typedef typename base_type::const_reference       const_reference;
  87.  
  88.       inline
  89.       binary_heap_const_iterator_(entry_pointer p_e) : base_type(p_e)
  90.       { }
  91.  
  92.       /// Default constructor.
  93.       inline
  94.       binary_heap_const_iterator_()
  95.       { }
  96.  
  97.       /// Copy constructor.
  98.       inline
  99.       binary_heap_const_iterator_(const binary_heap_const_iterator_& other)
  100.       : base_type(other)
  101.       { }
  102.  
  103.       /// Compares content to a different iterator object.
  104.       inline bool
  105.       operator==(const binary_heap_const_iterator_& other) const
  106.       { return base_type::m_p_e == other.m_p_e; }
  107.  
  108.       /// Compares content (negatively) to a different iterator object.
  109.       inline bool
  110.       operator!=(const binary_heap_const_iterator_& other) const
  111.       { return base_type::m_p_e != other.m_p_e; }
  112.  
  113.       inline binary_heap_const_iterator_&
  114.       operator++()
  115.       {
  116.         _GLIBCXX_DEBUG_ASSERT(base_type::m_p_e != 0);
  117.         inc();
  118.         return *this;
  119.       }
  120.  
  121.       inline binary_heap_const_iterator_
  122.       operator++(int)
  123.       {
  124.         binary_heap_const_iterator_ ret_it(base_type::m_p_e);
  125.         operator++();
  126.         return ret_it;
  127.       }
  128.  
  129.     private:
  130.       void
  131.       inc()
  132.       { ++base_type::m_p_e; }
  133.     };
  134.  
  135. #undef PB_DS_BIN_HEAP_CIT_BASE
  136.   } // namespace detail
  137. } // namespace __gnu_pbds
  138.  
  139. #endif
  140.