Path: news.f.de.plusline.net!news-fra1.dfn.de!newsfeed.hanau.net!newsfeed01.sul.t-online.de!t-online.de!news.germany.com!postnews.google.com!l77g2000hsb.googlegroups.com!not-for-mail
From: Marshall <marshall.spight@gmail.com>
Newsgroups: comp.databases.theory
Subject: Re: more closed-world chatter
Date: 5 May 2007 11:57:02 -0700
Organization: http://groups.google.com
Lines: 23
Message-ID: <1178391422.291226.290880@l77g2000hsb.googlegroups.com>
References: <Bh6_h.155482$aG1.143414@pd7urf3no>
   <Wl6_h.155487$aG1.62925@pd7urf3no>
   <4639315f$0$4019$9a566e8b@news.aliant.net>
   <lCl_h.156056$DE1.84607@pd7urf2no>
   <f1croj$oii$1@orkan.itea.ntnu.no>
   <jnH_h.159449$aG1.54991@pd7urf3no>
   <f1i97b$ps0$1@orkan.itea.ntnu.no>
NNTP-Posting-Host: 24.7.53.249
Mime-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
X-Trace: posting.google.com 1178391422 10490 127.0.0.1 (5 May 2007 18:57:02 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Sat, 5 May 2007 18:57:02 +0000 (UTC)
In-Reply-To: <f1i97b$ps0$1@orkan.itea.ntnu.no>
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.3) Gecko/20070309 Firefox/2.0.0.3,gzip(gfe),gzip(gfe)
Complaints-To: groups-abuse@google.com
Injection-Info: l77g2000hsb.googlegroups.com; posting-host=24.7.53.249;
   posting-account=s2xCFw0AAAD2mIwYYHAqjdsecwG0axmW
Xref: news.f.de.plusline.net comp.databases.theory:43803

On May 5, 8:50 am, Jon Heggland <jon.heggl...@idi.ntnu.no> wrote:
>
> > when it comes to the advantage of sub-typing in dealing with
> > my question.
>
> I don't know about "advantage"; I just don't see how you can avoid it.

It's easy to avoid: just don't put subtying in the language design.

Much of the talk in language design in the last ten years or more
has focused on various mechanisms for subtyping, but it's an
entirely optional language feature. That's easy to forget when
it's all anyone's talking about, but it is possible to just leave it
out.
It's also possible to leave a static type system out entirely.

Whether it is a good decision to do so will depend on a number
of factors. But I consider it important to keep in mind that it
is a deliberate choice.


Marshall