00001 // This file is a part of Aurelia. 00002 // Copyright (C) 2010 Valentin David 00003 // Copyright (C) 2010 University of Bergen 00004 // 00005 // This program is free software: you can redistribute it and/or modify 00006 // it under the terms of the GNU General Public License as published by 00007 // the Free Software Foundation, either version 3 of the License, or 00008 // (at your option) any later version. 00009 // 00010 // This program is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 // GNU General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with this program. If not, see <http://www.gnu.org/licenses/>. 00017 #ifndef __NOT_HH 00018 # define __NOT_HH 00019 00020 # include "../strategies.hh" 00021 00022 namespace aurelia { 00023 00026 template <typename S> 00027 struct not_strategy { 00028 private: S s; 00029 public: not_strategy(const S& s): s(s) {} 00030 template <typename T> 00031 T operator()(const T& term) const { 00032 try { 00033 s(term); 00034 } catch (failure) { 00035 return term; 00036 } 00037 throw failure(); 00038 } 00039 }; 00040 00045 template <typename S> 00046 not_strategy<S> not_(const S& s) { 00047 return not_strategy<S>(s); 00048 } 00049 00050 } 00051 00052 #endif