Thread: Dynamic binding

Originally Posted by Mario F.

Gotcha!

I was thinking in terms of static memory.

Under this situation the dynamic type of the pointer is known at compile-time.

Didn't occur to me that quote was in the context of dynamic allocated memory.

even with static memory it can sometimes be impossible to know.

Code:

Base b; 
Derived d; // assume d derived from b and overrides virtual func "DoStuff"

Base *pB = NULL;

char x;
cin >> x;
if (x == 'b')
    pB = &b;
else if (x == 'd')
    pB = &d;

if (pB)
    pB->DoStuff();

All stack memory and still impossible to know at compile time.