[Development] QVariant comparison in Qt6

Bernhard Lindner private at bernhard-lindner.de
Fri Sep 18 22:22:39 CEST 2020

> > Has anything changed for Qt6 (especially regarding comparison of equal
> > and/or convertible types)? Is the complete deprecation still the latest
> > decision?
> Yes, it's changed; no, it's not deprecation.
> What's been removed is the conversion. Aside from the numeric types, comparing 
> two variants of different types will always result in false. If you want to 
> compare across types, convert one to the other's type or to a common third 
> type. You know what data you put in there and you should know what conversions 
> can be lossy or not.

That would be much better than deprecation.

What about Qt 5.15? If I understood correctly, Qt 5.15 should prepare developers for
changes/deprecations/removals in Qt6. So I guess things that will remain part of Qt 6
should also be part of Qt 5.15. Still Qt 5.15 gives me warnings about deprecation of
operator < for QVariant.

Best Regards,
Bernhard Lindner

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