[Interest] Signed return type of QIODevice::pos() - why?

[Rainer Wiesenfarth]

One of my colleagues just asked the rather philosophical question why the
result of QFile::pos() - and thus QIODevice::pos() - is of type qint64 (and
thus signed). He had expected an unsigned type, ideally size_t or offset_t.

I was unable to find a reason, but maybe someone on the list can step in?

Best Regards / Mit freundlichen Grüßen
Rainer Wiesenfarth

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