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Path: utzoo!mnetor!seismo!rutgers!mit-eddie!cybvax0!meister
From: meister@cybvax0.UUCP (Philip W. Servita)
Newsgroups: comp.lang.c++
Subject: Re: Function Arguments
Message-ID: <1443@cybvax0.UUCP>
Date: Mon, 1-Jun-87 18:10:54 EDT
Article-I.D.: cybvax0.1443
Posted: Mon Jun  1 18:10:54 1987
Date-Received: Wed, 3-Jun-87 03:29:25 EDT
References: <31900002@boning>
Reply-To: meister@cybvax0.UUCP (Philip W. Servita)
Organization: Cybermation, Inc., Cambridge, MA
Lines: 28

In article <31900002@boning> boning@boning.applicon.UUCP writes:
>Suppose I have a base class and another class derived from the base class.
>I must declare the base class before the derived class. Then, if I try 
>to use the derived class as an argument to a function in the base class 
>the compiler signals an error since the derived class hasn't been defined 
>yet.
>
>Is there any way to use a derived class as an argument to a base class?
>I don't want to use a void pointer and lose type checking.
> ....

do something like this:

class b;

class a {
   fcn(b* foo);
   <stuff>
};

class b : a {
    <stuff>
}


the compiler will then shut up and take it.

                                    -phil