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// -*- C++ -*-

// Copyright (C) 2005, 2006, 2009 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 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_/const_point_iterator.hpp>

#include <debug/debug.h>

namespace __gnu_pbds

{

  namespace detail

  {

#define PB_DS_CLASS_C_DEC \

    binary_heap_const_iterator_<Value_Type, Entry, Simple, Allocator>

#define PB_DS_BASE_C_DEC \

    binary_heap_const_point_iterator_<Value_Type, Entry, Simple, Allocator>

    // Const point-type iterator.

    template<typename Value_Type,

             typename Entry,

             bool Simple,

             class Allocator>

    class binary_heap_const_iterator_ : public PB_DS_BASE_C_DEC

    {

    private:

      typedef typename PB_DS_BASE_C_DEC::entry_pointer entry_pointer;

      typedef PB_DS_BASE_C_DEC base_type;

    public:

      // Category.

      typedef std::forward_iterator_tag iterator_category;

      // Difference type.

      typedef typename Allocator::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;

    public:

      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 PB_DS_CLASS_C_DEC& other) : base_type(other)

      { }

      // Compares content to a different iterator object.

      inline bool

      operator==(const PB_DS_CLASS_C_DEC& other) const

      {

        return base_type::m_p_e == other.m_p_e;

      }

      // Compares content (negatively) to a different iterator object.

      inline bool

      operator!=(const PB_DS_CLASS_C_DEC& other) const

      {

        return base_type::m_p_e != other.m_p_e;

      }

      inline PB_DS_CLASS_C_DEC&

      operator++()

      {

        _GLIBCXX_DEBUG_ASSERT(base_type::m_p_e != NULL);

        inc();

        return *this;

      }

      inline PB_DS_CLASS_C_DEC

      operator++(int)

      {

        PB_DS_CLASS_C_DEC ret_it(base_type::m_p_e);

        operator++();

        return ret_it;

      }

    private:

      void

      inc()

      { ++base_type::m_p_e; }

    };

#undef PB_DS_CLASS_C_DEC

#undef PB_DS_BASE_C_DEC

  } // namespace detail

} // namespace __gnu_pbds

#endif