libstdc++-v3/include/ext/pb_ds/detail/rb_tree_map_/node.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005, 2006 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 2, 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 // You should have received a copy of the GNU General Public License
  17 // along with this library; see the file COPYING.  If not, write to
  18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  19 // MA 02111-1307, USA.
  20
  21 // As a special exception, you may use this file as part of a free
  22 // software library without restriction.  Specifically, if other files
  23 // instantiate templates or use macros or inline functions from this
  24 // file, or you compile this file and link it with other files to
  25 // produce an executable, this file does not by itself cause the
  26 // resulting executable to be covered by the GNU General Public
  27 // License.  This exception does not however invalidate any other
  28 // reasons why the executable file might be covered by the GNU General
  29 // Public License.
  30
  31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  32
  33 // Permission to use, copy, modify, sell, and distribute this software
  34 // is hereby granted without fee, provided that the above copyright
  35 // notice appears in all copies, and that both that copyright notice
  36 // and this permission notice appear in supporting documentation. None
  37 // of the above authors, nor IBM Haifa Research Laboratories, make any
  38 // representation about the suitability of this software for any
  39 // purpose. It is provided "as is" without express or implied
  40 // warranty.
  41
  42 /**
  43  * @file node.hpp
  44  * Contains an implementation for rb_tree_.
  45  */
  46
  47 #ifndef PB_DS_RB_TREE_NODE_HPP
  48 #define PB_DS_RB_TREE_NODE_HPP
  49
  50 #include <ext/pb_ds/detail/basic_tree_policy/null_node_metadata.hpp>
  51
  52 namespace __gnu_pbds
  53 {
  54   namespace detail
  55   {
  56     template<typename Value_Type, class Metadata, class Allocator>
  57     struct rb_tree_node_
  58     {
  59     public:
  60       typedef Value_Type value_type;
  61       typedef Metadata metadata_type;
  62
  63       typedef
  64       typename Allocator::template rebind<
  65       rb_tree_node_<
  66       Value_Type,
  67       Metadata,
  68       Allocator> >::other::pointer
  69       node_pointer;
  70
  71       typedef
  72       typename Allocator::template rebind<
  73         metadata_type>::other::reference
  74       metadata_reference;
  75
  76       typedef
  77       typename Allocator::template rebind<
  78         metadata_type>::other::const_reference
  79       const_metadata_reference;
  80
  81       inline bool
  82       special() const
  83       { return m_red; }
  84
  85       inline const_metadata_reference
  86       get_metadata() const
  87       { return m_metadata; }
  88
  89       inline metadata_reference
  90       get_metadata()
  91       { return m_metadata; }
  92
  93 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
  94       void
  95       trace() const
  96       {
  97         std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ")
  98                   << "(" << m_metadata << ")";
  99       }
 100 #endif
 101
 102       node_pointer m_p_left;
 103       node_pointer m_p_right;
 104       node_pointer m_p_parent;
 105       value_type m_value;
 106       bool m_red;
 107       metadata_type m_metadata;
 108     };
 109
 110     template<typename Value_Type, class Allocator>
 111     struct rb_tree_node_<Value_Type, null_node_metadata, Allocator>
 112     {
 113     public:
 114       typedef Value_Type value_type;
 115       typedef null_node_metadata metadata_type;
 116
 117       typedef
 118       typename Allocator::template rebind<
 119       rb_tree_node_<
 120       Value_Type,
 121       null_node_metadata,
 122       Allocator> >::other::pointer
 123       node_pointer;
 124
 125       inline bool
 126       special() const
 127       { return m_red; }
 128
 129 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
 130       void
 131       trace() const
 132       { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); }
 133 #endif
 134
 135       node_pointer m_p_left;
 136       node_pointer m_p_right;
 137       node_pointer m_p_parent;
 138       value_type m_value;
 139       bool m_red;
 140     };
 141   } // namespace detail
 142 } // namespace __gnu_pbds
 143
 144 #endif