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,FREEMAIL_FROM
	autolearn=ham autolearn_force=no version=3.4.4
X-Google-Thread: 103376,f822ae7b0f7433c1
X-Google-Attributes: gid103376,public
X-Google-Language: ENGLISH,UTF8
Path: 
 g2news2.google.com!news3.google.com!news.glorb.com!proxad.net!proxad.net!newsfeed.arcor.de!newsspool2.arcor-online.net!news.arcor.de.POSTED!not-for-mail
Newsgroups: comp.lang.ada
Subject: Re: Translating an embedded C algorithm
From: Georg Bauhaus <bauhaus@arcor.de>
In-Reply-To: <1168963927.396654.169380@s34g2000cwa.googlegroups.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>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Organization: #
Message-Id: <1168967445.2218.119.camel@localhost>
Mime-Version: 1.0
X-Mailer: Evolution 2.6.1 
Date: Tue, 16 Jan 2007 18:10:46 +0100
NNTP-Posting-Date: 16 Jan 2007 18:08:39 CET
NNTP-Posting-Host: 3d0bc843.newsspool2.arcor-online.net
X-Trace: 
 DXC=ME@SLhY1ALhUoRk[hk2WalA9EHlD;3Ycb4Fo<]lROoRaFl8W>\BH3YbfGeI3He6jcdN[W<lHX`=Bd\6BhD5G6\il>AC4NYREJhb
X-Complaints-To: usenet-abuse@arcor.de
Xref: g2news2.google.com comp.lang.ada:8182
Date: 2007-01-16T18:08:39+01:00
List-Id: <comp.lang.ada>

On Tue, 2007-01-16 at 08:12 -0800, Ludovic Brenta wrote:
> Jean-Pierre Rosen a =C3=A9crit :
> >> A question: I see all the time things like "if (.. < ..)" in C - are t=
he
> >> parentheses required there ?
> > Yes, they are - because C has no "then" keyword. There must be somethin=
g
> > to tell the compiler where the expression ends...
>=20
> Not to mention that the parentheses may contain several expressions
> separated by the comma operator, some or all of which may have side
> effects, and only the last of which actually controls the if
> statement... for example:
>=20
> if (a =3D 1, b =3D a, c =3D --a, (a =3D --b) =3D=3D c) {
>    ...
> }
>
> Ah, the joy of obfuscated programming :) :) :)

Obfuscuation in this style is quite possible in Ada, too,
including side effects. This is from a legal program:

   if (a =3D 1, b =3D a) =3D T' (c =3D -a, (a =3D -b) =3D- c) then
      null;
   end if;

Hint: the parentheses are needed :)