00001 // This file is a part of Catsfoot. 00002 // Copyright (C) 2011 Uni Research 00003 // 00004 // This program is free software: you can redistribute it and/or modify 00005 // it under the terms of the GNU Lesser Public License as published by 00006 // the Free Software Foundation, either version 3 of the License, or 00007 // (at your option) any later version. 00008 // 00009 // This program is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 // GNU Lesser Public License for more details. 00013 // 00014 // You should have received a copy of the GNU Lesser Public License 00015 // along with this program. If not, see <http://www.gnu.org/licenses/>. 00016 00017 #ifndef POSITION_HH 00018 # define POSITION_HH 00019 00020 namespace catsfoot { 00021 namespace details { 00022 00024 template <size_t, typename, typename...> 00025 struct position_impl {}; 00026 00028 template <size_t N, typename T, typename... U> 00029 struct position_impl<N, T, T, U...>: 00030 public std::integral_constant<size_t, N> { 00031 }; 00032 00034 template <size_t N, typename T, typename U, typename... V> 00035 struct position_impl<N, T, U, V...>: 00036 public position_impl<N+1, T, V...> { 00037 }; 00038 00040 template <typename T, typename... U> 00041 struct position: public position_impl<0u, T, U...> { 00042 }; 00043 } 00044 } 00045 00046 #endif