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

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005-2024 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 typename rebind_traits<_Alloc, splay_tree_node_>::pointer
  57         node_pointer;
  58
  59       typedef typename rebind_traits<_Alloc, metadata_type>::reference
  60         metadata_reference;
  61
  62       typedef typename rebind_traits<_Alloc, metadata_type>::const_reference
  63         metadata_const_reference;
  64
  65 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
  66       void
  67       trace() const
  68       { std::cout << PB_DS_V2F(m_value) << "(" << m_metadata << ")"; }
  69 #endif
  70
  71       inline bool
  72       special() const
  73       { return m_special; }
  74
  75       inline metadata_const_reference
  76       get_metadata() const
  77       { return m_metadata; }
  78
  79       inline metadata_reference
  80       get_metadata()
  81       { return m_metadata; }
  82
  83       value_type m_value;
  84       bool m_special;
  85       node_pointer m_p_left;
  86       node_pointer m_p_right;
  87       node_pointer m_p_parent;
  88       metadata_type m_metadata;
  89     };
  90
  91     template<typename Value_Type, typename _Alloc>
  92     struct splay_tree_node_<Value_Type, null_type, _Alloc>
  93     {
  94     public:
  95       typedef Value_Type value_type;
  96       typedef null_type metadata_type;
  97
  98       typedef typename rebind_traits<_Alloc, splay_tree_node_>::pointer
  99         node_pointer;
 100
 101       inline bool
 102       special() const
 103       { return m_special; }
 104
 105 #ifdef PB_DS_BIN_SEARCH_TREE_TRACE_
 106       void
 107       trace() const
 108       { std::cout << PB_DS_V2F(m_value); }
 109 #endif
 110
 111       node_pointer m_p_left;
 112       node_pointer m_p_right;
 113       node_pointer m_p_parent;
 114       value_type m_value;
 115       bool m_special;
 116     };
 117   } // namespace detail
 118 } // namespace __gnu_pbds
 119
 120 #endif