From 7503484066176443571 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,386ad3d115455fbe X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2002-12-10 19:55:45 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.icl.net!newsfeed.fjserv.net!kibo.news.demon.net!mutlu.news.demon.net!demon!mail2news.demon.co.uk!devnull From: markus.mauhart@nospamm.chello.at ("Markus Mauhart") Newsgroups: comp.std.c++ Subject: Re: properties of scalar objects w/ indeterminate value //Re: iterator defect or feature? Date: Wed, 11 Dec 2002 03:55:40 +0000 (UTC) Organization: Customers chello Austria Lines: 27 Approved: fjh@cs.mu.oz.au (Fergus Henderson , moderator of comp.std.c++) Message-ID: References: <3de29db4.7069828@news.earthlink.net> <3defdcd5.44116609@news.earthlink.net> <3DF15F04.1000801@wizard.net> <3DF56F52.4040102@wizard.net> X-Trace: mail2news.demon.co.uk 1039578940 25356 10.0.0.1 (11 Dec 2002 03:55:40 GMT) X-Complaints-To: abuse@demon.net NNTP-Posting-Date: Wed, 11 Dec 2002 03:55:40 +0000 (UTC) X-Received: from mulga.cs.mu.oz.au ([128.250.1.22]) by news.demon.co.uk with esmtp (Exim 4.05) id 18LxyD-0006ap-00 for mail2news@news.news.demon.net; Wed, 11 Dec 2002 03:55:38 +0000 X-Received: from localhost (localhost [[UNIX: localhost]]) by mulga.cs.mu.OZ.AU id OAA27760; Wed, 11 Dec 2002 14:55:29 +1100 (EST) X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Path: comp-std-cpp-robomod!not-for-mail X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Delivered-To: std-c++@ncar.ucar.edu X-Newsgroups: comp.std.c++ X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-NNTP-Posting-Date: Tue, 10 Dec 2002 09:46:25 MET X-Spam-Status: No, hits=-5.2 required=5.0 tests=INVALID_MSGID,NOSPAM_INC,PRIORITY_NO_NAME, QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_01_02 version=2.41 Xref: archiver1.google.com comp.std.c++:15923 "James Kuyper Jr." wrote ... > > Markus Mauhart wrote: > > > BTW, from C99 I couldnt find out how conversion (-> copy, assignment) > > between compound type objects is done: recursive copying of members > > (like c++) or "memcopy(dst,src,sizeof(both))" ? > > It took me a long time to find the relevant clause; it's not in any > location I'd have expected it to be in. > > C99 6.2.6.1: "When a value is stored in an object of structure or union > type, ... the bytes of the object representation that correspond to any > padding bytes take unspecified values. 42)" > > Footnote 42: "Thus, for example, structure assignment may be implemented > element-at-a-time or via memcpy." Thanks ! Markus. --- [ 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 ]