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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2022 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 typename rebind_traits<_Alloc, rb_tree_node_>::pointer
  59         node_pointer;
  60
  61       typedef typename rebind_traits<_Alloc, metadata_type>::reference
  62         metadata_reference;
  63
  64       typedef typename rebind_traits<_Alloc, metadata_type>::const_reference
  65         metadata_const_reference;
  66
  67       bool
  68       special() const
  69       { return m_red; }
  70
  71       metadata_const_reference
  72       get_metadata() const
  73       { return m_metadata; }
  74
  75       metadata_reference
  76       get_metadata()
  77       { return m_metadata; }
  78
  79 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
  80       void
  81       trace() const
  82       {
  83         std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> ")
  84                   << "(" << m_metadata << ")";
  85       }
  86 #endif
  87
  88       node_pointer      m_p_left;
  89       node_pointer      m_p_right;
  90       node_pointer      m_p_parent;
  91       value_type        m_value;
  92       bool              m_red;
  93       metadata_type     m_metadata;
  94     };
  95
  96     template<typename Value_Type, typename _Alloc>
  97     struct rb_tree_node_<Value_Type, null_type, _Alloc>
  98     {
  99     public:
 100       typedef Value_Type                value_type;
 101       typedef null_type         metadata_type;
 102
 103       typedef typename rebind_traits<_Alloc, rb_tree_node_>::pointer
 104         node_pointer;
 105
 106       bool
 107       special() const
 108       { return m_red; }
 109
 110 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
 111       void
 112       trace() const
 113       { std::cout << PB_DS_V2F(m_value) <<(m_red? " <r> " : " <b> "); }
 114 #endif
 115
 116       node_pointer      m_p_left;
 117       node_pointer      m_p_right;
 118       node_pointer      m_p_parent;
 119       value_type        m_value;
 120       bool              m_red;
 121     };
 122   } // namespace detail
 123 } // namespace __gnu_pbds
 124
 125 #endif