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

Easiest way is to make your interface templated.

template 
class IFoo {
    public:
        virtual void functionA()=0;
        virtual void functionB(T arg){ do something; };
};

template
class Foo : public IFoo{
    public:
        void functionA(){ do something; };
        void functionB(T arg){ do something; };
};