Call derived method from base pointer

Question

I'd like to do the following:

void do_stuff(Base* base_ptr) {
   // here I need the overridden methods
   base_ptr->init();
}

class Base {
   Base() {
     do_stuff(this);
   }
   virtual void init() {}
};

class Derived : public Base {
   virtual void init() override {
      // Derived specific init
   }
}

But all I get are calls to Base::init(), is it even possible to do what I intend?

I think the call to `new Derived` is implied here as what should be run. — David van rijn, Nov 22 '15 at 11:27
Are you allowed to call virtual functions from the constructor? — Mats Petersson, Nov 22 '15 at 11:27

score 2 · Accepted Answer · edited May 23 '17 at 12:30

2

You are calling a virtual function from within the constructor!

Duplicated of -> Calling virtual functions inside constructors

edited May 23 '17 at 12:30

Community

1
1

answered Nov 22 '15 at 11:28

simpel01

1,792
12
13

Thanks, is it ok to "register" the object in some global container in the base constructor? The access to the virtual methods would happen at a later point. – Teris Nov 22 '15 at 12:01

Call derived method from base pointer

1 Answers1