00001 // Copyright (C) 2007, 2009 EPITA Research and Development Laboratory (LRDE) 00002 // 00003 // This file is part of Olena. 00004 // 00005 // Olena is free software: you can redistribute it and/or modify it under 00006 // the terms of the GNU General Public License as published by the Free 00007 // Software Foundation, version 2 of the License. 00008 // 00009 // Olena 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 GNU 00012 // General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with Olena. If not, see <http://www.gnu.org/licenses/>. 00016 // 00017 // As a special exception, you may use this file as part of a free 00018 // software project without restriction. Specifically, if other files 00019 // instantiate templates or use macros or inline functions from this 00020 // file, or you compile this file and link it with other files to produce 00021 // an executable, this file does not by itself cause the resulting 00022 // executable to be covered by the GNU General Public License. This 00023 // exception does not however invalidate any other reasons why the 00024 // executable file might be covered by the GNU General Public License. 00025 00026 #ifndef MLN_FUN_CAST_HH 00027 # define MLN_FUN_CAST_HH 00028 00034 # include <mln/core/concept/function.hh> 00035 00036 00037 namespace mln 00038 { 00039 00040 namespace fun 00041 { 00042 00043 // FIXME: Doc! 00044 template <typename V, typename F> 00045 struct cast_p2v_expr_ : public Function_v2v< cast_p2v_expr_<V,F> > 00046 { 00047 typedef V result; 00048 00049 cast_p2v_expr_(const F& f) 00050 : f_(f) 00051 {} 00052 00053 template <typename P> 00054 V operator()(const P& p) const 00055 { 00056 return static_cast<V>(f_(p)); // FIXME: value::cast? 00057 } 00058 00059 protected: 00060 const F f_; 00061 }; 00062 00063 00064 00065 # ifndef MLN_INCLUDE_ONLY 00066 00067 template <typename V, typename F> 00068 inline 00069 cast_p2v_expr_<V, F> 00070 cast(const Function_v2v<F>& f) 00071 { 00072 cast_p2v_expr_<V, F> tmp(exact(f)); 00073 return tmp; 00074 } 00075 00076 # endif // ! MLN_INCLUDE_ONLY 00077 00078 } // end of namespace mln::fun 00079 00080 } // end of namespace mln 00081 00082 00083 #endif // ! MLN_FUN_CAST_HH
1.7.1