include/Enumerator.h
00001 /* 00002 ** Tanl 00003 ** include/Enumerator.h 00004 ** ---------------------------------------------------------------------- 00005 ** Copyright (c) 2005 Giuseppe Attardi (attardi@di.unipi.it). 00006 ** ---------------------------------------------------------------------- 00007 ** 00008 ** This file is part of Tanl. 00009 ** 00010 ** Tanl is free software; you can redistribute it and/or modify it 00011 ** under the terms of the GNU General Public License, version 3, 00012 ** as published by the Free Software Foundation. 00013 ** 00014 ** Tanl is distributed in the hope that it will be useful, 00015 ** but WITHOUT ANY WARRANTY; without even the implied warranty of 00016 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00017 ** GNU General Public License for more details. 00018 ** 00019 ** You should have received a copy of the GNU General Public License 00020 ** along with this program. If not, see <http://www.gnu.org/licenses/>. 00021 ** ---------------------------------------------------------------------- 00022 */ 00023 00024 #ifndef Tanl_Enumerator_H 00025 #define Tanl_Enumerator_H 00026 00027 namespace Tanl { 00028 00029 struct Disposable { 00031 virtual void Dispose() {} 00032 }; 00033 00039 template <class T> 00040 class Enumerator : public Disposable 00041 { 00042 public: 00043 typedef T ItemType; 00044 00047 virtual bool MoveNext() = 0; 00048 00050 virtual ItemType Current() = 0; 00051 00053 virtual void Reset() {} 00054 00055 virtual ~Enumerator() {} 00056 }; 00057 00058 } // namespace Tanl 00059 00060 #endif // Tanl_Enumerator_H