CS202 4- ‹#›
nDynamic binding delays until run time the binding of a member function to a pointer or reference and requires that the compiler generate code to select the correct member function at run time instead of compile time.
nSome implementations create an array of member function pointers for all virtual functions. Each
derived class has its own
unique array of pointers. Functions that
are inherited result in pointers to direct or indirect base class member functions. Functions that are overridden result in pointers to the derived class member functions. Each virtual function has the same index in this table for each derived class. Only one
table exists per class that
is shared by all objects of a class.
Dynamic Binding Mechanism