null_node_metadata.hpp revision 169691
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 null_node_metadata.hpp 44 * Contains an implementation class for tree-like classes. 45 */ 46 47#ifndef PB_DS_NULL_NODE_METADATA_HPP 48#define PB_DS_NULL_NODE_METADATA_HPP 49 50#include <ext/pb_ds/detail/types_traits.hpp> 51 52namespace pb_ds 53{ 54 namespace detail 55 { 56 template<typename Key, class Data, class Allocator> 57 struct dumconst_node_iterator 58 { 59 private: 60 typedef typename types_traits<Key, Data, Allocator, false>::pointer const_iterator; 61 62 public: 63 typedef const_iterator value_type; 64 typedef const_iterator const_reference; 65 typedef const_reference reference; 66 }; 67 68 struct null_node_metadata 69 { }; 70 } // namespace detail 71} // namespace pb_ds 72 73#endif 74