mingw/lib/gcc/mingw32/4.3.3/include/c++/ext/pb_ds/detail/basic_tree_policy/basic_tree_policy_base.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 basic_tree_policy_base.hpp
  44  * Contains a base class for tree_like policies.
  45  */
  46
  47 #ifndef PB_DS_TREE_LIKE_POLICY_BASE_HPP
  48 #define PB_DS_TREE_LIKE_POLICY_BASE_HPP
  49
  50 namespace __gnu_pbds
  51 {
  52   namespace detail
  53   {
  54
  55 #define PB_DS_CLASS_C_DEC                                               \
  56     basic_tree_policy_base<                                             \
  57                                                         Const_Node_Iterator, \
  58                                                         Node_Iterator,  \
  59                                                         Allocator>
  60
  61     template<typename Const_Node_Iterator,
  62              typename Node_Iterator,
  63              typename Allocator>
  64     struct basic_tree_policy_base
  65     {
  66     protected:
  67       typedef typename Node_Iterator::value_type it_type;
  68
  69       typedef typename std::iterator_traits< it_type>::value_type value_type;
  70
  71       typedef typename value_type::first_type key_type;
  72
  73       typedef
  74       typename Allocator::template rebind<
  75         typename remove_const<
  76         key_type>::type>::other::const_reference
  77       const_key_reference;
  78
  79       typedef
  80       typename Allocator::template rebind<
  81         typename remove_const<
  82         value_type>::type>::other::const_reference
  83       const_reference;
  84
  85       typedef
  86       typename Allocator::template rebind<
  87         typename remove_const<
  88         value_type>::type>::other::reference
  89       reference;
  90
  91       typedef
  92       typename Allocator::template rebind<
  93         typename remove_const<
  94         value_type>::type>::other::const_pointer
  95       const_pointer;
  96
  97       static inline const_key_reference
  98       extract_key(const_reference r_val)
  99       {
 100         return (r_val.first);
 101       }
 102
 103       virtual it_type
 104       end() = 0;
 105
 106       it_type
 107       end_iterator() const
 108       {
 109         return (const_cast<PB_DS_CLASS_C_DEC* >(this)->end());
 110       }
 111
 112       virtual
 113       ~basic_tree_policy_base()
 114       { }
 115     };
 116
 117     template<typename Const_Node_Iterator, typename Allocator>
 118     struct basic_tree_policy_base<
 119       Const_Node_Iterator,
 120       Const_Node_Iterator,
 121       Allocator>
 122     {
 123     protected:
 124       typedef typename Const_Node_Iterator::value_type it_type;
 125
 126       typedef typename std::iterator_traits< it_type>::value_type value_type;
 127
 128       typedef value_type key_type;
 129
 130       typedef
 131       typename Allocator::template rebind<
 132         typename remove_const<
 133         key_type>::type>::other::const_reference
 134       const_key_reference;
 135
 136       typedef
 137       typename Allocator::template rebind<
 138         typename remove_const<
 139         value_type>::type>::other::const_reference
 140       const_reference;
 141
 142       typedef
 143       typename Allocator::template rebind<
 144         typename remove_const<
 145         value_type>::type>::other::reference
 146       reference;
 147
 148       typedef
 149       typename Allocator::template rebind<
 150         typename remove_const<
 151         value_type>::type>::other::const_pointer
 152       const_pointer;
 153
 154       static inline const_key_reference
 155       extract_key(const_reference r_val)
 156       {
 157         return (r_val);
 158       }
 159
 160       virtual it_type
 161       end() const = 0;
 162
 163       it_type
 164       end_iterator() const
 165       {
 166         return (end());
 167       }
 168
 169       virtual
 170       ~basic_tree_policy_base()
 171       { }
 172     };
 173
 174 #undef PB_DS_CLASS_C_DEC
 175
 176   } // namespace detail
 177 } // namespace __gnu_pbds
 178
 179 #endif // #ifndef PB_DS_TREE_LIKE_POLICY_BASE_HPP