00001 // Copyright (C) 2007, 2008, 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 #include <mln/core/concept/image.hh> 00027 #include <mln/value/concept/all.hh> 00028 #include <mln/trait/op/plus.hh> 00029 #include <mln/value/builtin/all.hh> 00030 00031 00032 namespace mln 00033 { 00034 00035 00036 template <typename T> 00037 struct my_image2d : Image< my_image2d<T> > 00038 { 00039 void m() {} 00040 }; 00041 00042 00043 namespace trait 00044 { 00045 00046 // int + float -> float 00047 00048 template <> 00049 struct set_precise_binary_< op::plus, int, float > 00050 { 00051 typedef float ret; 00052 }; 00053 00054 00055 // Image I + Image J -> bool (demo type!) 00056 00057 template <typename I, typename J> 00058 struct set_binary_< op::plus, Image, I, Image, J > 00059 { 00060 typedef bool ret; 00061 }; 00062 00063 // precise definition: my_image2d<T> + my_image2d<U> -> my_image2d<V> 00064 // ('&' is to avoid compiling an empty class) 00065 00066 template <typename T, typename U> 00067 struct set_precise_binary_< op::plus, my_image2d<T>, my_image2d<U> > 00068 { 00069 typedef mln_trait_op_plus(T, U) V; 00070 typedef my_image2d<V>& ret; 00071 }; 00072 00073 } 00074 00075 } 00076 00077 int main() 00078 { 00079 using namespace mln; 00080 { 00081 mln_trait_op_plus_(int, float) tmp; 00082 tmp = 5.1f; 00083 } 00084 { 00085 my_image2d<float>* ptr; 00086 mln_trait_op_plus_(my_image2d<int>, my_image2d<float>) tmp = *ptr; 00087 tmp.m(); 00088 } 00089 }
1.7.1