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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2016 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 rb_tree_map_/node.hpp
  38  * Contains an implementation for rb_tree_.
  39  */
  40
  41 #ifndef PB_DS_RB_TREE_NODE_HPP
  42 #define PB_DS_RB_TREE_NODE_HPP
  43
  44 #include <ext/pb_ds/detail/branch_policy/null_node_metadata.hpp>
  45
  46 namespace __gnu_pbds
  47 {
  48   namespace detail
  49   {
  50     /// Node for Red-Black trees.
  51     template<typename Value_Type, class Metadata, typename _Alloc>
  52     struct rb_tree_node_
  53     {
  54     public:
  55       typedef Value_Type                value_type;
  56       typedef Metadata                  metadata_type;
  57
  58       typedef
  59       typename _Alloc::template rebind<
  60       rb_tree_node_<
  61       Value_Type,
  62       Metadata,
  63       _Alloc> >::other::pointer
  64       node_pointer;
  65
  66       typedef
  67       typename _Alloc::template rebind<
  68         metadata_type>::other::reference
  69       metadata_reference;
  70
  71       typedef
  72       typename _Alloc::template rebind<
  73         metadata_type>::other::const_reference
  74       metadata_const_reference;
  75
  76       bool
  77       special() const
  78       { return m_red; }
  79
  80       metadata_const_reference
  81       get_metadata() const
  82       { return m_metadata; }
  83
  84       metadata_reference
  85       get_metadata()
  86       { return m_metadata; }
  87
  88 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
  89       void
  90       trace() const
  91       {
  92         std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ")
  93                   << "(" << m_metadata << ")";
  94       }
  95 #endif
  96
  97       node_pointer      m_p_left;
  98       node_pointer      m_p_right;
  99       node_pointer      m_p_parent;
 100       value_type        m_value;
 101       bool              m_red;
 102       metadata_type     m_metadata;
 103     };
 104
 105     template<typename Value_Type, typename _Alloc>
 106     struct rb_tree_node_<Value_Type, null_type, _Alloc>
 107     {
 108     public:
 109       typedef Value_Type                value_type;
 110       typedef null_type         metadata_type;
 111
 112       typedef
 113       typename _Alloc::template rebind<
 114       rb_tree_node_<
 115       Value_Type,
 116       null_type,
 117       _Alloc> >::other::pointer
 118       node_pointer;
 119
 120       bool
 121       special() const
 122       { return m_red; }
 123
 124 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
 125       void
 126       trace() const
 127       { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); }
 128 #endif
 129
 130       node_pointer      m_p_left;
 131       node_pointer      m_p_right;
 132       node_pointer      m_p_parent;
 133       value_type        m_value;
 134       bool              m_red;
 135     };
 136   } // namespace detail
 137 } // namespace __gnu_pbds
 138
 139 #endif