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// -*- C++ -*-

// Copyright (C) 2005, 2006 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 2, 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.

// You should have received a copy of the GNU General Public License
// along with this library; see the file COPYING.  If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, USA.

// As a special exception, you may use this file as part of a free
// software library without restriction.  Specifically, if other files
// instantiate templates or use macros or inline functions from this
// file, or you compile this file and link it with other files to
// produce an executable, this file does not by itself cause the
// resulting executable to be covered by the GNU General Public
// License.  This exception does not however invalidate any other
// reasons why the executable file might be covered by the GNU General
// Public License.

// 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 node.hpp
 * Contains an implementation struct for this type of heap's node.
 */

#ifndef PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_NODE_HPP
#define PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_NODE_HPP

#include <ext/pb_ds/detail/left_child_next_sibling_heap_/null_metadata.hpp>

namespace pb_ds
{
  namespace detail
  {

    template<typename Value_Type, typename Metadata_Type, class Allocator>
    struct left_child_next_sibling_heap_node_
    {
    private:
      typedef
      left_child_next_sibling_heap_node_<
      Value_Type,
      Metadata_Type,
      Allocator>
      this_type;

    public:
      typedef typename Allocator::size_type size_type;

      typedef
      typename Allocator::template rebind<
	this_type>::other::pointer
      node_pointer;

      typedef Value_Type value_type;

      typedef Metadata_Type metadata_type;

    public:
      value_type m_value;

      metadata_type m_metadata;

      node_pointer m_p_l_child;

      node_pointer m_p_next_sibling;

      node_pointer m_p_prev_or_parent;
    };

    template<typename Value_Type, class Allocator>
    struct left_child_next_sibling_heap_node_<
      Value_Type,
      null_left_child_next_sibling_heap_node_metadata,
      Allocator>
    {
    private:
      typedef
      left_child_next_sibling_heap_node_<
      Value_Type,
      null_left_child_next_sibling_heap_node_metadata,
      Allocator>
      this_type;

    public:
      typedef typename Allocator::size_type size_type;

      typedef
      typename Allocator::template rebind<
	this_type>::other::pointer
      node_pointer;

      typedef Value_Type value_type;

    public:
      value_type m_value;

      node_pointer m_p_l_child;

      node_pointer m_p_next_sibling;

      node_pointer m_p_prev_or_parent;
    };

  } // namespace detail
} // namespace pb_ds

#endif // #ifndef PB_DS_LEFT_CHILD_NEXT_SIBLING_HEAP_NODE_HPP