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 __ONLY_FOR_HH 00018 # define __ONLY_FOR_HH 00019 00020 # include "../failure.hh" 00021 00022 namespace aurelia { 00023 00024 template <typename Strat, typename T> 00025 struct only_for_strategy { 00026 Strat s; 00027 only_for_strategy(const Strat& s): s(s) {} 00028 00029 T operator()(T&& in) const { 00030 return s(std::move(in)); 00031 } 00032 00033 T operator()(const T& in) const { 00034 return s(in); 00035 } 00036 00037 template <typename U> 00038 U operator()(U) const { 00039 throw failure(); 00040 } 00041 }; 00042 00043 template <typename T> 00044 struct only_for { 00045 template <typename Strat> 00046 only_for_strategy<Strat,T> operator()(const Strat& s) { 00047 return s; 00048 } 00049 }; 00050 00051 } 00052 00053 #endif