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=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Thread: 103376,f822ae7b0f7433c1
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,ASCII
Path: 
 g2news2.google.com!news1.google.com!news.maxwell.syr.edu!newsswitch.lcs.mit.edu!nntp.TheWorld.com!not-for-mail
From: Robert A Duff <bobduff@shell01.TheWorld.com>
Newsgroups: comp.lang.ada
Subject: Re: Translating an embedded C algorithm
Date: Fri, 19 Jan 2007 15:34:11 -0500
Organization: The World Public Access UNIX, Brookline, MA
Message-ID: <wcczm8ekb7g.fsf@shell01.TheWorld.com>
References: <1168871816.263502.212100@11g2000cwr.googlegroups.com>
 <mailman.22.1168919455.18371.comp.lang.ada@ada-france.org>
 <45ace573$1_3@news.bluewin.ch> <68qioe.mes.ln@hunter.axlog.fr>
 <1168963927.396654.169380@s34g2000cwa.googlegroups.com>
 <eoj0u8$148$1@aioe.org> <11e7vht8gdl0z$.2dypcyr85i3w.dlg@40tude.net>
 <eoj46g$8gl$4@aioe.org> <147rcq0tjavdf.lzroutxxh59k$.dlg@40tude.net>
 <eojaut$nne$1@aioe.org> <sYPrh.29632$E02.11971@newsb.telia.net>
 <eopr78$50i$1@cernne03.cern.ch> <oQ9sh.29706$E02.12104@newsb.telia.net>
NNTP-Posting-Host: shell01.theworld.com
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
X-Trace: pcls4.std.com 1169238851 945 192.74.137.71 (19 Jan 2007 20:34:11 GMT)
X-Complaints-To: abuse@TheWorld.com
NNTP-Posting-Date: Fri, 19 Jan 2007 20:34:11 +0000 (UTC)
User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/21.3 (irix)
Cancel-Lock: sha1:lw92kOpskkKr1O9kBJOvzFIl4Cc=
Xref: g2news2.google.com comp.lang.ada:8349
Date: 2007-01-19T15:34:11-05:00
List-Id: <comp.lang.ada>

Bj�rn Persson <spam-away@nowhere.nil> writes:

> Maciej Sobczak wrote:
>
>> Bj�rn Persson wrote:
>> 
>>>> C has case statements as well.
>>> 
>>> The switch statement is utterly broken (so to speak). I prefer not to use
>>> it. I suppose my code contains slightly more "==" because of this.
>> 
>> What have you gained? Is your code more readable? Easier for maintenance?
>
> I get rid of the risk of forgetting a break, so my code is hopefully less
> buggy.
>
> I feel that the risk that I'll forget a break is greater than the risk that
> I'll make an assignment instead of a comparison. If you feel the other way,
> maybe you'll choose to use the switch statement.

A switch statement in C is really just a computed goto.  Google for
"duff's device" for an "interesting" example.  (No relation, by the
way.)

I agree that "forgetting break" is an issue.  But the much bigger issue
is that Ada case statements have full-coverage rules, checked at compile
time.  That's one of my favorite features of Ada.

- Bob