QList of user templated defined structs?

Why you would want a container to have dissimilar objects is probably a design flaw. However some languages support this such as Smalltalk which has the concept of a Bag Collection that can contain a mix of different object types. Qt may have some sort of bag container class already but I am unaware of it's existence.

A template class isn't a class, it's a template. You can use it to instantiate completely unrelated classes, such as AA and AA.

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