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,ASCII-7-bit
Path: 
 g2news2.google.com!news1.google.com!news.germany.com!aioe.org!not-for-mail
From: Cesar Rabak <csrabak@yahoo.com.br>
Newsgroups: comp.lang.ada
Subject: Re: Translating an embedded C algorithm
Date: Tue, 16 Jan 2007 16:08:21 -0200
Organization: Aioe.org NNTP Server
Message-ID: <eoj46g$8gl$4@aioe.org>
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>
NNTP-Posting-Host: zEJK12x7djBBvRARhduGQA.user.aioe.org
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-Complaints-To: abuse@aioe.org
In-Reply-To: 
User-Agent: Thunderbird 1.5.0.8 (X11/20061109)
Xref: g2news2.google.com comp.lang.ada:8192
Date: 2007-01-16T16:08:21-02:00
List-Id: <comp.lang.ada>

Dmitry A. Kazakov escreveu:
> On Tue, 16 Jan 2007 15:12:44 -0200, Cesar Rabak wrote:
> 
>> Would you believe that:
>>
>> if (a = 1) {
>>      ...
>> }
>>
>> Is semantically valid C, but because it is very easy to mistake this 
>> when the intended was:
>>
>> if (a == 1) {
>>      ...
>> }
>>
>> That there are tools to look for and signal this!?
> 
> There is a good C-style rule for that. Place all constants on the left,
> i.e.
> 
>  if (1 = a) {  // Compile error
> 
> Another advantage is that constant expressions are usually shorter, so it
> becomes more readable as well.
> 
Not always the assigment or comparison is being done against a constant, 
so this is an advance, but still does not avoid all mishaps.