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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 node.hpp
+ * Contains an implementation struct for splay_tree_'s node.
+ */
+
+#ifndef PB_DS_SPLAY_TREE_NODE_HPP
+#define PB_DS_SPLAY_TREE_NODE_HPP
+
+namespace __gnu_pbds
+{
+ namespace detail
+ {
+ template<typename Value_Type, class Metadata, class Allocator>
+ struct splay_tree_node_
+ {
+ public:
+ typedef Value_Type value_type;
+ typedef Metadata metadata_type;
+
+ typedef
+ typename Allocator::template rebind<
+ splay_tree_node_<Value_Type, Metadata, Allocator> >::other::pointer
+ node_pointer;
+
+ typedef
+ typename Allocator::template rebind<metadata_type>::other::reference
+ metadata_reference;
+
+ typedef
+ typename Allocator::template rebind<metadata_type>::other::const_reference
+ const_metadata_reference;
+
+#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
+ void
+ trace() const
+ { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
+#endif
+
+ inline bool
+ special() const
+ { return m_special; }
+
+ inline const_metadata_reference
+ get_metadata() const
+ { return m_metadata; }
+
+ inline metadata_reference
+ get_metadata()
+ { return m_metadata; }
+
+ value_type m_value;
+ bool m_special;
+ node_pointer m_p_left;
+ node_pointer m_p_right;
+ node_pointer m_p_parent;
+ metadata_type m_metadata;
+ };
+
+ template<typename Value_Type, typename Allocator>
+ struct splay_tree_node_<Value_Type, null_node_metadata, Allocator>
+ {
+ public:
+ typedef Value_Type value_type;
+ typedef null_node_metadata metadata_type;
+
+ typedef
+ typename Allocator::template rebind<
+ splay_tree_node_<Value_Type, null_node_metadata, Allocator> >::other::pointer
+ node_pointer;
+
+ inline bool
+ special() const
+ { return m_special; }
+
+#ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
+ void
+ trace() const
+ { std::cout << PB_DS_V2F(m_value); }
+#endif
+
+ node_pointer m_p_left;
+ node_pointer m_p_right;
+ node_pointer m_p_parent;
+ value_type m_value;
+ bool m_special;
+ };
+ } // namespace detail
+} // namespace __gnu_pbds
+
+#endif