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That was super painful. It seems that some of the Quackle types that
have custom operator==() give fits to the MOC compiler when those
types are used as arguments for slots and/or signals (or maybe it's
only when they're connected in a certain way...frankly, I never did
figure this out precisely to my satisfaction). The compilers provide
very little help in resolving this problem.
Once I understood the problem, VS22 was giving me just the tiniest
morsel, enough that I could hunt down the offending slot/signal
(it wasn't even giving me the name of the slot/signal...just the type
it was trying to use). I've changed all offending functions to use
const pointers to types instead of const references, and this makes
Qt happy.
I couldn't find any info on the web directly about this, but here's
the closest I did find, which suggests that this is related to
increased functionality in Qt6 regarding reflection.
https://forum.qt.io/topic/141434/
This fixes my VC++22 x86-64 build. Hopefully it fixes all of the
others, too.
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