text: // -*- C++ -*-
  
  // Copyright (C) 2005-2017 Free Software Foundation, Inc.
  //
  // This file is part of the GNU ISO C++ Library.  This library is free
  // software; you can redistribute it and/or modify it under the terms
  // of the GNU General Public License as published by the Free Software
  // Foundation; either version 3, or (at your option) any later
  // version.
  
  // This library is distributed in the hope that it will be useful, but
  // WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  // General Public License for more details.
  
  // Under Section 7 of GPL version 3, you are granted additional
  // permissions described in the GCC Runtime Library Exception, version
  // 3.1, as published by the Free Software Foundation.
  
  // You should have received a copy of the GNU General Public License and
  // a copy of the GCC Runtime Library Exception along with this program;
  // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  // <http://www.gnu.org/licenses/>.
  
  // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  
  // Permission to use, copy, modify, sell, and distribute this software
  // is hereby granted without fee, provided that the above copyright
  // notice appears in all copies, and that both that copyright notice
  // and this permission notice appear in supporting documentation. None
  // of the above authors, nor IBM Haifa Research Laboratories, make any
  // representation about the suitability of this software for any
  // purpose. It is provided "as is" without express or implied
  // warranty.
  
  /**
   * @file binary_heap_/const_iterator.hpp
   * Contains an iterator class returned by the table's const find and insert
   *     methods.
   */
  
  #ifndef PB_DS_BINARY_HEAP_CONST_ITERATOR_HPP
  #define PB_DS_BINARY_HEAP_CONST_ITERATOR_HPP
  
  #include <ext/pb_ds/detail/binary_heap_/point_const_iterator.hpp>
  #include <debug/debug.h>
  
  namespace __gnu_pbds
  {
    namespace detail
    {
  #define PB_DS_BIN_HEAP_CIT_BASE \
      binary_heap_point_const_iterator_<Value_Type, Entry, Simple, _Alloc>
  
      /// Const point-type iterator.
      template<typename Value_Type,
  	     typename Entry,
  	     bool Simple,
  	     typename _Alloc>
      class binary_heap_const_iterator_ : public PB_DS_BIN_HEAP_CIT_BASE
      {
      private:
        typedef PB_DS_BIN_HEAP_CIT_BASE 		       	base_type;
        typedef typename base_type::entry_pointer 	entry_pointer;
  
      public:
        /// Category.
        typedef std::forward_iterator_tag 		iterator_category;
  
        /// Difference type.
        typedef typename _Alloc::difference_type 		difference_type;
  
        /// Iterator's value type.
        typedef typename base_type::value_type 		value_type;
  
        /// Iterator's pointer type.
        typedef typename base_type::pointer 		pointer;
  
        /// Iterator's const pointer type.
        typedef typename base_type::const_pointer 	const_pointer;
  
        /// Iterator's reference type.
        typedef typename base_type::reference 		reference;
  
        /// Iterator's const reference type.
        typedef typename base_type::const_reference 	const_reference;
  
        inline
        binary_heap_const_iterator_(entry_pointer p_e) : base_type(p_e)
        { }
  
        /// Default constructor.
        inline
        binary_heap_const_iterator_()
        { }
  
        /// Copy constructor.
        inline
        binary_heap_const_iterator_(const binary_heap_const_iterator_& other) 
        : base_type(other)
        { }
  
        /// Compares content to a different iterator object.
        inline bool
        operator==(const binary_heap_const_iterator_& other) const
        { return base_type::m_p_e == other.m_p_e; }
  
        /// Compares content (negatively) to a different iterator object.
        inline bool
        operator!=(const binary_heap_const_iterator_& other) const
        { return base_type::m_p_e != other.m_p_e; }
  
        inline binary_heap_const_iterator_& 
        operator++()
        {
  	_GLIBCXX_DEBUG_ASSERT(base_type::m_p_e != 0);
  	inc();
  	return *this;
        }
  
        inline binary_heap_const_iterator_
        operator++(int)
        {
  	binary_heap_const_iterator_ ret_it(base_type::m_p_e);
  	operator++();
  	return ret_it;
        }
  
      private:
        void
        inc()
        { ++base_type::m_p_e; }
      };
  
  #undef PB_DS_BIN_HEAP_CIT_BASE
    } // namespace detail
  } // namespace __gnu_pbds
  
  #endif 
  