Newsgroups: comp.os.msdos.djgpp
From: manni DOT heumann AT gmx DOT de (Manni Heumann)
Subject: Re: deleting NULL ?
References: <8q1u4s$jh3$1 AT info DOT cyf-kr DOT edu DOT pl> <01c02165$667c2780$c3247d81 AT default>
X-Newsreader: News Xpress 2.01
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Date: Sun, 17 Sep 2000 11:53:06 GMT
NNTP-Posting-Host: ppp36-17.hrz.uni-bielefeld.de
Message-ID: <39c4b0a5_1@news.uni-bielefeld.de>
X-Trace: 17 Sep 2000 13:53:09 +0200, ppp36-17.hrz.uni-bielefeld.de
Lines: 32
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

In article <01c02165$667c2780$c3247d81 AT default>, "doug" <deleveld AT dds DOT nl> wrote:
>Rafał Maj <r_maj AT poczta DOT onet DOT pl> schreef in artikel
><8q1u4s$jh3$1 AT info DOT cyf-kr DOT edu DOT pl>...
>> Hi,
>> what is supposed to happen when I'll try delete NULL:
>> int* x = NULL;
>> delete x;
>> Should I every time write   if (x) delete x;    ?
>
>IIRC, the C++ standard says it is legal to delete(0) and it must do
>nothing.
>To be sure check the C++ faq.  I think it is the same in C, but I am not
>sure.
>I don't know if DJGPP is compliant for this....
>
>Doug
>

That's right: Invoking delete on a NULL-Pointer simply is 
supposed to do nothing.
See:
http://www.slac.stanford.
edu/BFROOT/www/Computing/Environment/Standards/C++/cd2/

Sorry for the line break.


--

Manni

Life would be much easier if I had the source code.