Iterating over different types

In C++17 or better you’d use fold expressions, to “walk through” your heterogenous arguments applying the member function:

auto Printer = [](auto&&... args) {
    (args.show(), ...);
};

Printer(w1, w2, w3, w4, w5, w6, t1, t2, t3);

Demo

You can read more on this in my blog