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/image/image2d.hh> 00027 #include <mln/core/image/imorph/decorated_image.hh> 00028 00029 00030 unsigned count_read = 0, count_write = 0; 00031 00032 template <typename I> 00033 struct counter 00034 { 00035 void reading(const I&, const mln_psite(I)&) const 00036 { 00037 ++count_read; 00038 } 00039 void writing(I&, const mln_psite(I)&, const mln_value(I)&) 00040 { 00041 ++count_write; 00042 } 00043 }; 00044 00045 00046 int main() 00047 { 00048 using namespace mln; 00049 00050 typedef image2d<int> I; 00051 I ima(1, 1); 00052 point2d p = point2d(0, 0); 00053 00054 decorated_image< I, counter<I> > ima_ = decorate(ima, counter<I>()); 00055 ima_(p) = ima_(p) = 51; 00056 mln_assertion(count_read == 1 && count_write == 2); 00057 00058 const I& imac = ima; 00059 decorated_image< const I, counter<I> > cima_ = decorate(imac, counter<I>()); 00060 /* Note that the statement 00061 00062 cima_(p); 00063 00064 alone would *not* trigger a read. It seems the compiler 00065 optimizes in our back... */ 00066 int v = cima_(p); 00067 // Avoid a warning on unused value V. 00068 v = v; 00069 mln_assertion(count_read == 2 && count_write == 2); 00070 }
1.7.1