From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.3 required=5.0 tests=BAYES_00,INVALID_MSGID
	autolearn=no autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: fac41,b87849933931bc93
X-Google-Attributes: gidfac41,public
X-Google-Thread: 109fba,b87849933931bc93
X-Google-Attributes: gid109fba,public
X-Google-Thread: f43e6,b87849933931bc93
X-Google-Attributes: gidf43e6,public
X-Google-Thread: 114809,b87849933931bc93
X-Google-Attributes: gid114809,public
X-Google-Thread: 1108a1,b87849933931bc93
X-Google-Attributes: gid1108a1,public
X-Google-Thread: 103376,b87849933931bc93
X-Google-Attributes: gid103376,public
From: Nick Leaton <nickle@calfp.co.uk>
Subject: Re: What is wrong with OO ?
Date: 1997/02/21
Message-ID: <330DDFA3.5982@calfp.co.uk>#1/1
X-Deja-AN: 220461856
X-NNTP-Posting-Host: calfp.demon.co.uk
References: <JSA.97Jan1181506@alexandria> <E3I8GL.AuH@research.att.com>
 <32D11FD3.41C6@wi.leidenuniv.nl> <E3pzy4.DHE@research.att.com>
 <01bbd23a$5b667cc0$LocalHost@christophe-leph>
 <01bc0269$3fd55b20$ca61e426@DCorbit.solutionsiq.com> <E5DuvE.LyC@tip.nl>
 <32FF1199.615E@calfp.co.uk> <3303A993.759E@pratique.fr>
To: Valentin Bonnard <bonnardv@pratique.fr>
Content-Type: text/plain; charset=us-ascii
MIME-Version: 1.0
Newsgroups: 
 comp.lang.c++,comp.lang.smalltalk,comp.lang.eiffel,comp.lang.ada,comp.object,comp.software-eng
X-Mailer: Mozilla 3.0Gold (X11; I; SunOS 5.5 sun4m)
Date: 1997-02-21T00:00:00+00:00
List-Id: <comp.lang.ada>


> Nick Leaton wrote:
> >
> > richard@highrise.nl wrote:
> > >
> > > Virtual functions are also a kind of documentation. When declaring a
> > > function virtual, the programmer is more or less saying "go ahead,
> > > override this function if you like."
> >
> > The decision to make a function virtual assumes a knowledge of what
> > users of your class are going to do. It akin to predicting the future.
> 
> No. If it make sense to override, make it virtual; if it doesn't,
> don't make it virtual.

I think you might have missed the start of the thread. If you buy third
party libraries, you don't always get source. With no source, you cannot
make the function virtual.

-- 

Nick