| // -*- C++ -*- |
| |
| // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the terms |
| // of the GNU General Public License as published by the Free Software |
| // Foundation; either version 3, or (at your option) any later |
| // version. |
| |
| // This library is distributed in the hope that it will be useful, but |
| // WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| // General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. |
| |
| // Permission to use, copy, modify, sell, and distribute this software |
| // is hereby granted without fee, provided that the above copyright |
| // notice appears in all copies, and that both that copyright notice |
| // and this permission notice appear in supporting documentation. None |
| // of the above authors, nor IBM Haifa Research Laboratories, make any |
| // representation about the suitability of this software for any |
| // purpose. It is provided "as is" without express or implied |
| // warranty. |
| |
| /** |
| * @file node_metadata_selector.hpp |
| * Contains an implementation class for trees. |
| */ |
| |
| #ifndef PB_DS_TREE_NODE_METADATA_SELECTOR_HPP |
| #define PB_DS_TREE_NODE_METADATA_SELECTOR_HPP |
| |
| #include <ext/pb_ds/detail/basic_tree_policy/null_node_metadata.hpp> |
| #include <ext/pb_ds/detail/types_traits.hpp> |
| |
| namespace __gnu_pbds |
| { |
| namespace detail |
| { |
| |
| template<typename Node_Update, bool Null> |
| struct tree_metadata_helper |
| { |
| typedef typename Node_Update::metadata_type type; |
| }; |
| |
| template<typename Node_Update> |
| struct tree_metadata_helper< |
| Node_Update, |
| true> |
| { |
| typedef null_node_metadata type; |
| }; |
| |
| template<typename Key, |
| typename Data, |
| class Cmp_Fn, |
| template<typename Const_Node_Iterator, |
| class Const_Iterator, |
| class Cmp_Fn_, |
| class Allocator_> |
| class Node_Update, |
| class Allocator> |
| struct tree_node_metadata_selector |
| { |
| private: |
| typedef |
| dumconst_node_iterator< |
| Key, |
| Data, |
| Allocator> |
| dumconst_node_it; |
| |
| enum |
| { |
| null_update = |
| is_same< |
| Node_Update< |
| dumconst_node_it, |
| dumconst_node_it, |
| Cmp_Fn, |
| Allocator>, |
| null_tree_node_update< |
| dumconst_node_it, |
| dumconst_node_it, |
| Cmp_Fn, |
| Allocator> >::value |
| }; |
| |
| public: |
| typedef |
| typename tree_metadata_helper< |
| Node_Update< |
| dumconst_node_it, |
| dumconst_node_it, |
| Cmp_Fn, |
| Allocator>, |
| null_update>::type |
| type; |
| }; |
| |
| } // namespace detail |
| } // namespace __gnu_pbds |
| |
| #endif // #ifndef PB_DS_TREE_NODE_METADATA_SELECTOR_HPP |
