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From: mnm@hpcupt3.cup.hp.com (Michey Mehta)
Newsgroups: comp.lang.c++
Subject: Re: Adding multiple inheritance to a single inheritance class library.
Message-ID: <45680011@hpcupt3.cup.hp.com>
Date: 17 Jun 91 21:19:23 GMT
References: <10971@castle.ed.ac.uk>
Organization: Hewlett Packard, Cupertino
Lines: 12

> More object-oriented languages than C++ (Simula, Eiffel, ...) typically
> enforce run-time checking of such casts to make them safe; in C++ such
> checking is not even possible.  It was a deliberate (and in my opinion
> unfortunate) desing decision in C++ that all objects do not carry
> sufficient type information like they do in those others languages.

All is not lost. The ANSI C++ committee is currently considering
various mechanism for enforcing type safe casts, and it is quite
likely that such a feature will be added to the language.

Michey Mehta
Hewlett-Packard Computer Language Lab