From 5316168549880260036 X-Google-Thread: f78e5,e2cfdf64f67c7793 X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news1.google.com!news.glorb.com!news.zanker.org!news.clara.net!wagner.news.clara.net!194.159.246.34.MISMATCH!peer-uk.news.demon.net!kibo.news.demon.net!mutlu.news.demon.net!news.demon.co.uk!demon!stump.algebra.com!devnull From: news0@nospam.demon.co.uk (John G Harris) Newsgroups: comp.std.c++ Subject: Re: Eliminating uninitialised variables Date: Wed, 22 Sep 2004 17:14:58 GMT Organization: None Lines: 28 Sender: mail2news@demon.net Approved: fjh@cs.mu.oz.au (Fergus Henderson , moderator of comp.std.c++) Message-ID: <1GKClHFePJUBFwoH@jgharris.demon.co.uk> References: NNTP-Posting-Host: news.news.demon.net Mime-Version: 1.0 Content-Type: text/plain;charset=us-ascii X-Trace: news.demon.co.uk 1095873303 29229 158.152.254.254 (22 Sep 2004 17:15:03 GMT) X-Complaints-To: abuse@demon.net NNTP-Posting-Date: Wed, 22 Sep 2004 17:15:03 +0000 (UTC) X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-User-Agent: Turnpike/6.03-S () X-Spam-Checker-Version: SpamAssassin 2.64-mulga_r1 (2004-01-11) on mulga.cs.mu.OZ.AU X-Spam-Status: No, hits=-3.7 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=2.64-mulga_r1 X-Reply-To: reply0@jgharris.demon.co.uk X-Received: (from fjh@localhost) by mulga.cs.mu.OZ.AU (8.12.10+Sun/8.12.9/Submit) id i8MHEwHg014274; Thu, 23 Sep 2004 03:14:58 +1000 (EST) X-Path: comp-std-cpp-robomod!not-for-mail X-Spam-Level: X-Delivered-To: std-c++@ucar.edu X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Newsgroups: comp.std.c++ Xref: g2news1.google.com comp.std.c++:2828 In message , Dave Harris writes >What else am I missing? This is surely the kind of thing which future >revisions of the C++ standard should be considering. 1 Are there any compilers that make a good job of warning about the use of uninitialised variables? If there are then surely that's a better solution. 2 Why is zero a better junk value than any other junk value? 3 Wouldn't it be simpler to say that all stack space and all heap space is zeroed before (re-)use? 4 What about volatile? John -- John Harris --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ]