Calling C++ class methods via a function pointer

Question

How do I obtain a function pointer for a class member function, and later call that member function with a specific object? I’d like to write:

class Dog : A         


        

Answer 1

To create a new object you can either use placement new, as mentioned above, or have your class implement a clone() method that creates a copy of the object. You can then call this clone method using a member function pointer as explained above to create new instances of the object. The advantage of clone is that sometimes you may be working with a pointer to a base class where you don't know the type of the object. In this case a clone() method can be easier to use. Also, clone() will let you copy the state of the object if that is what you want.