Class Hierarchy Graphs, Function Devirtualization, & RTTI

Listing 2

#include "f1.H"
int DoSomething( A *pa) {
    // Cannot replace get_val with A::get_val
    DoSomethingElse(pa->get_val());
}
            <file f1.C>
class A {
    int i;
public:
    A(): i(0) {};
    ~A() {};
    virtual int get_val() { return i; };
};
        < file f1.H>
#include "f1.H"
class B: public A {
    int j;
public:
    B(): j(0) {};
    ~B() {};
    virtual int get_val() { return j+2; };
};
        <file f2.C>