// -*- C++ -*- // Copyright (C) 2005, 2006 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 2, 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. // You should have received a copy of the GNU General Public License // along with this library; see the file COPYING. If not, write to // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, // MA 02111-1307, USA. // As a special exception, you may use this file as part of a free // software library without restriction. Specifically, if other files // instantiate templates or use macros or inline functions from this // file, or you compile this file and link it with other files to // produce an executable, this file does not by itself cause the // resulting executable to be covered by the GNU General Public // License. This exception does not however invalidate any other // reasons why the executable file might be covered by the GNU General // Public License. // 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 tries. */ #ifndef PB_DS_TRIE_NODE_METADATA_SELECTOR_HPP #define PB_DS_TRIE_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 pb_ds { namespace detail { template<typename Node_Update, bool Null> struct trie_metadata_helper { typedef typename Node_Update::metadata_type type; }; template<typename Node_Update> struct trie_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 trie_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_trie_node_update< dumconst_node_it, dumconst_node_it, Cmp_Fn, Allocator> >::value }; public: typedef typename trie_metadata_helper< Node_Update< dumconst_node_it, dumconst_node_it, Cmp_Fn, Allocator>, null_update>::type type; }; } // namespace detail } // namespace pb_ds #endif // #ifndef PB_DS_TRIE_NODE_METADATA_SELECTOR_HPP