From -4843421902568582240 X-Google-Thread: f78e5,51456c3eb8f9490e X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news2.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!t-online.de!feeder.news-service.com!newsgate.cistron.nl!xs4all!news.tele.dk!news.tele.dk!small.news.tele.dk!lnewsinpeer00.lnd.ops.eu.uu.net!emea.uu.net!peer-uk.news.demon.net!kibo.news.demon.net!news.demon.co.uk!demon!stump.algebra.com!devnull From: hofmann@anvil-soft.com ("Matthias Hofmann") Newsgroups: comp.std.c++ Subject: Re: Copy Constructor Confusion! Date: Tue, 22 Aug 2006 14:51:32 GMT Lines: 43 Sender: mail2news@demon.net Approved: fjh@cs.mu.oz.au (Fergus Henderson , moderator of comp.std.c++) Message-ID: <4l0b4dFe1jfnU1@individual.net> References: <1155645873.296811.3890@74g2000cwt.googlegroups.com> <1155654560.689240.298360@i3g2000cwc.googlegroups.com> <1155833485.406514.274480@i3g2000cwc.googlegroups.com> <4kjormFcgsncU1@individual.net> <1156163006.926218.91070@i3g2000cwc.googlegroups.com> NNTP-Posting-Host: news.news.demon.net X-Trace: news.demon.co.uk 1156258306 26217 158.152.254.254 (22 Aug 2006 14:51:46 GMT) X-Complaints-To: abuse@demon.net NNTP-Posting-Date: Tue, 22 Aug 2006 14:51:46 +0000 (UTC) X-Original-To: std-c++@mailman.ucar.edu X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Priority: 3 X-Orig-X-Trace: individual.net tXVJ8uh1lbuu/2ABXR65/A3rqt+mtrCg3Ami4o1wlQmYvVJGJB X-RFC2646: Format=Flowed; Original X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au X-MSMail-Priority: Normal X-Originating-IP: 130.133.1.2 X-Received: (from fjh@localhost) by mulga.csse.unimelb.edu.au (8.13.6+Sun/8.13.6/Submit) id k7MEpXR6011735; Wed, 23 Aug 2006 00:51:33 +1000 (EST) X-Path: comp-std-cpp-robomod!not-for-mail X-Delivered-To: std-c++@mailman.ucar.edu X-Authentication-Warning: mulga.csse.unimelb.edu.au: fjh set sender to devnull@stump.algebra.com using -f X-Newsreader: Microsoft Outlook Express 6.00.2900.2180 X-Newsgroups: comp.std.c++ Xref: g2news2.google.com comp.std.c++:3409 "kanze" schrieb im Newsbeitrag news:1156163006.926218.91070@i3g2000cwc.googlegroups.com... > Note that for a non-POD class type, the default constructor for > T is called. In the unlikely case that you define a > user-defined destructor or a user-defined copy assignment > operator, but no constructor, T() becomes once again a no-op (or > rather, leaves the object in an undefined state). I thought that a user-defined destructor would not have any influence on the implicit definition of a default constructor, but the following code does indeed output a random value: struct X { ~X() {} int i; }; int main() { cout << X().i << endl; return 0; } This puzzles me, as it does not seem to make any sense. Can you please show me the sections of the standard that require this behaviour? -- Matthias Hofmann Anvil-Soft, CEO http://www.anvil-soft.com - The Creators of Toilet Tycoon http://www.anvil-soft.de - Die Macher des Klomanagers --- [ 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.comeaucomputing.com/csc/faq.html ]