Re: Combining functions with multiple inheritance?

From:

Victor Bazarov <v.Abazarov@comAcast.net>

Newsgroups:

comp.lang.c++

Date:

Wed, 29 Oct 2008 13:08:15 -0400

Message-ID:

<gea59v$dif$2@news.datemas.de>

Dasuraga wrote:

I'm rather new to the object-oriented aspects of C++, and this is the
first time I've had to construct some classes with multiple
inheritance. I'd rather not make a variable just to identify what type
an object is (leading to using a case, which somewhat defeats the
utility of derived classes). So, here's my problem. I have a couple
classes in this layout(simplistically):
class A{
void f()=0;

I believe you meant

virtual void f() = 0;

}

; // missing semicolon

class B:virtual public A{
void f();
}

; // missing semicolon

class C:virtual public A{
void f();
}

; // missing semicolon

class D:virtual public A{
void f();
}

; // missing semicolon

class E:virtual public B,virtual public C{};
class F:virtual public B,virtual public D{};

So, is there a way to make it so that E::f() automatically invokes
B::f(), then C::f()( similarly for F::f())? If not, is there a better
layout that you might be able to suggest?

What do you mean by "automatically"? Have you tried "manually"? As in

     void E::f() {
         B::f();
         C::f();
     }

     void F::f() {
         B::f();
         D::f();
     }

....

V
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