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From: mittle@blinn.watson.ibm.com (Josh Mittleman)
Newsgroups: comp.lang.c++
Subject: Re: How to define a List class
Message-ID: <1991Jun07.164812.18340@watson.ibm.com>
Date: 7 Jun 91 16:48:12 GMT
References: <350001@hpgnd.grenoble.hp.com>
Sender: @watson.ibm.com
Organization: IBM T. J. Watson Research
Lines: 18


> My problem is that "next" holds (or returns) a pointer to a List, not to
> a  SomeListableObject,  i.e.  the above  code  won't  compile,  unless I
> introduce a cast like:
> 
> 	list	= (SomeListableObject*)list->next;
> 
> Is there a solution  that  avoids  that cast and which  doesn't  use the
> preprocessor ?

No.  That's why everyone is so pleased at the advent of templates.  

A question for the general audience: Will templates as implemented in v3
duplicate code?

===========================================================================
Josh Mittleman (mittle@watson.ibm.com or joshua@paul.rutgers.edu)
J2-C28 T.J. Watson Research Center, PO Box 704, Yorktown Heights, NY  10598