On Dienstag, 20. September 2016 12:21:11 CEST Mathias Hasselmann wrote: > Am 19.09.2016 um 23:27 schrieb Olivier Goffart: > > We really cannot have a qHash for QVariant anyway, because that would > > imply > > that ALL QVariant can be hashed, and compared. Which is not the case. Most > > custom types don't even register comparator function. > > Which actually is quite a serious issue, as we do a simply memcmp() on > such custom types, which simply won't work if your custom data structure > contains uninitialized memory from alignment padding.
We don't do that. We just return false in that case. > It is easy to forget registering comparator functions and currently Qt > doesn't help in debugging such issues. So I wonder if QVariant should > forbid comparison of custom types without having a comparator function > registered. That's a source incompatible change. -- Olivier Woboq - Qt services and support - https://woboq.com - https://code.woboq.org _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development
