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-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,3b98a26890a2d400,start X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2003-01-17 07:04:56 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!newsfeed.us.prserv.net!prserv.net!cyclone.swbell.net!bos-service1.ext.raytheon.com!bos-service2.ext.raytheon.com.POSTED!not-for-mail Message-ID: <3E281B97.76F47E30@noSpam.raytheon.com> From: Michael Bustillo X-Mailer: Mozilla 4.79 [en]C-CCK-MCD (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: comp.lang.ada Subject: Keyword "null" Question Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Date: Fri, 17 Jan 2003 10:04:55 -0500 NNTP-Posting-Host: 147.18.247.233 X-Complaints-To: news@ext.ray.com X-Trace: bos-service2.ext.raytheon.com 1042815896 147.18.247.233 (Fri, 17 Jan 2003 10:04:56 EST) NNTP-Posting-Date: Fri, 17 Jan 2003 10:04:56 EST Organization: Raytheon Company Xref: archiver1.google.com comp.lang.ada:33130 Date: 2003-01-17T10:04:55-05:00 List-Id: While reviewing the Ada LRM, it makes note that the Ada keyword "null" does nothing except pass to the next statement. This seems intuitive enough, however... I'm currently attempting to reverse engineer some code so that it can be converted to another language, and I've run across the following: if SOME_EVENT_TOOK_PLACE then null; end if; This statement is simply standing alone by itself, not part of any "case-like" structure or anything sneaky. I guess my question is when it says "...it does nothing..." does it actually mean that it is putting a NO OP there? Because then this would actually be doing something, most likely a timing issue, and that's what I need to know. I appreciate your time, and thanks.