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From: mheaney@ni.net (Matthew Heaney)
Subject: Re: Building blocks (Was: Design By Contract)
Date: 1997/10/04
Message-ID: <mheaney-ya023680000410971755550001@news.ni.net>#1/1
X-Deja-AN: 277909009
References: <34316EC3.5B62@dynamite.com.au>
 <199710011402.QAA02444@basement.replay.com> <EHFvt5.D1G@world.std.com>
Organization: Estormza Software
Newsgroups: comp.lang.ada
Date: 1997-10-04T00:00:00+00:00
List-Id: <comp.lang.ada>


In article <EHFvt5.D1G@world.std.com>, bobduff@world.std.com (Robert A
Duff) wrote:


>By the way, speaking of negative logic, what do people think about
>negative logic in "if" statements?  I tend to try to reduce the number
>of "not"s in the code.  But other people tend to use some other
>heuristic, such as "do the normal case first" or "do unusual case
>first".  For example:

I like to handle the exceptional case first, and return early.

>Or perhaps even:
>
>    if Is_Evil(X) then
>        print error message;
>        return;
>    end if;
>    ... -- 37 lines of code doing the normal thing

This one gets my vote.

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Matthew Heaney
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