[hasenj]

Don't C++ classes (and therefore structs) have a hidden vtable?

[plq]

vtable is always "hidden". It's only there when there is at least one virtual member defined. Sole difference between class and struct in C++ is default visibility.

    class A {
        int a; // private
    }

    struct A {
        int a; // public
    }

[taejo]

Only if they have virtual members.