On Thursday 25 May 2017 18:40:46 Christoph Feck wrote: > If you only return a view to the container, then if the container is > modified, the return value is no longer valid. Returning a full > container (referenced, with copy-on-write semantics) will not have this > problem.
If you return a vector of QRects from QRegion, then modify the QRegion, the rectangles you have a no longer valid, either. Yes, the program will not crash, nor will Valgrind complain. But it will use outdated information. If you use the QRegion::begin/end(), and you do the same mistake, you get a crash or valgrind complains. So what you said is that you'd rather have the API hide your mistakes from you than to point them out to you. Interesting approach. I wish you luck persuing it. Thanks, Marc (seriously considering installing Gnome now) -- Marc Mutz <[email protected]> | Senior Software Engineer KDAB (Deutschland) GmbH & Co.KG, a KDAB Group Company Tel: +49-30-521325470 KDAB - The Qt, C++ and OpenGL Experts _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
