CS202 4- ‹#›
nWhen a member function is to be bound to a pointer or reference at run time, the function accessed is obtained
by selecting the correct member
function pointer out of the
virtual table pointed to by the current object's virtual pointer. It doesn't matter what the type of the object is, its virtual pointer will point to the correct
virtual table of function pointers
for that object.
nNote the additional costs of dynamic binding. With static binding, a member function is directly bound to an object. With dynamic binding, three additional levels of indirection may be needed to bind the correct member function pointer with a pointer or reference to an object.
Dynamic Binding Mechanism