00001 // Copyright (C) 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 <map> 00027 #include <mln/value/proxy.hh> 00028 00029 00030 template <typename T> 00031 struct test 00032 { 00033 // Interface required by mln::value::proxy. 00034 00035 typedef int psite; 00036 typedef T value; 00037 00038 void write_(const psite& p, const value& v) 00039 { 00040 // std::cout << "write value " << v << " at " << p << std::endl; 00041 data_[p] = v; 00042 } 00043 00044 value read_(const psite& p) const 00045 { 00046 // std::cout << "read at " << p << " -> value " << data_[p] << std::endl; 00047 return data_[p]; 00048 } 00049 00050 mutable std::map<psite,value> data_; 00051 00052 // Some extra interface of an Image. 00053 00054 value operator()(const psite& p) const 00055 { 00056 return read_(p); // Read only! 00057 } 00058 00059 mln::value::proxy<test> operator()(const psite& p) 00060 { 00061 mln::value::proxy<test> prx(*this, p); 00062 return prx; 00063 } 00064 }; 00065 00066 00067 00068 int main() 00069 { 00070 using namespace mln; 00071 00072 test<float> ima; 00073 00074 int p = 3; 00075 00076 ima(p) = 8.5; 00077 ima(p) = 6 * ima(p); 00078 mln_assertion(ima(p) == 51); 00079 00080 test<int> ima_; 00081 ima_(p) = 51; 00082 ima_(p) = ima_(p); 00083 mln_assertion(ima_(p) == 51); 00084 }
1.7.1