Creating an interface for an abstract class template in C++

Question

I have the code as below. I have a abstract template class Foo and two subclasses (Foo1 and Foo2) which derive from instantiations of the template. I wish to use pointers in

Answer 1

I don't think you can get what you want. Think of this if you were to implement your suggestion: if you have a pointer to an IFoo instance and you call functionB(), what type parameter should you give it? The underlying problem is that Foo1::functionB and Foo2::functionB have different signatures and do different things.