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  1. // -*- C++ -*-
  2.  
  3. // Copyright (C) 2005-2015 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 splay_tree_/node.hpp
  38.  * Contains an implementation struct for splay_tree_'s node.
  39.  */
  40.  
  41. #ifndef PB_DS_SPLAY_TREE_NODE_HPP
  42. #define PB_DS_SPLAY_TREE_NODE_HPP
  43.  
  44. namespace __gnu_pbds
  45. {
  46.   namespace detail
  47.   {
  48.     /// Node for splay tree.
  49.     template<typename Value_Type, class Metadata, typename _Alloc>
  50.     struct splay_tree_node_
  51.     {
  52.     public:
  53.       typedef Value_Type value_type;
  54.       typedef Metadata metadata_type;
  55.  
  56.       typedef
  57.       typename _Alloc::template rebind<
  58.       splay_tree_node_<Value_Type, Metadata, _Alloc> >::other::pointer
  59.       node_pointer;
  60.  
  61.       typedef
  62.       typename _Alloc::template rebind<metadata_type>::other::reference
  63.       metadata_reference;
  64.  
  65.       typedef
  66.       typename _Alloc::template rebind<metadata_type>::other::const_reference
  67.       metadata_const_reference;
  68.  
  69. #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
  70.       void
  71.       trace() const
  72.       { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
  73. #endif
  74.  
  75.       inline bool
  76.       special() const
  77.       { return m_special; }
  78.  
  79.       inline metadata_const_reference
  80.       get_metadata() const
  81.       { return m_metadata; }
  82.  
  83.       inline metadata_reference
  84.       get_metadata()
  85.       { return m_metadata; }
  86.  
  87.       value_type m_value;
  88.       bool m_special;
  89.       node_pointer m_p_left;
  90.       node_pointer m_p_right;
  91.       node_pointer m_p_parent;
  92.       metadata_type m_metadata;
  93.     };
  94.  
  95.     template<typename Value_Type, typename _Alloc>
  96.     struct splay_tree_node_<Value_Type, null_type, _Alloc>
  97.     {
  98.     public:
  99.       typedef Value_Type value_type;
  100.       typedef null_type metadata_type;
  101.  
  102.       typedef
  103.       typename _Alloc::template rebind<
  104.       splay_tree_node_<Value_Type, null_type, _Alloc> >::other::pointer
  105.       node_pointer;
  106.  
  107.       inline bool
  108.       special() const
  109.       { return m_special; }
  110.  
  111. #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
  112.       void
  113.       trace() const
  114.       { std::cout << PB_DS_V2F(m_value); }
  115. #endif
  116.  
  117.       node_pointer m_p_left;
  118.       node_pointer m_p_right;
  119.       node_pointer m_p_parent;
  120.       value_type m_value;
  121.       bool m_special;
  122.     };
  123.   } // namespace detail
  124. } // namespace __gnu_pbds
  125.  
  126. #endif
  127.