From 3682356868766492116 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,a615cd43626d4d92 X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2004-03-24 01:14:20 PST Path: archiver1.google.com!news2.google.com!news.maxwell.syr.edu!newsfeed.icl.net!newsfeed.fjserv.net!colt.net!kibo.news.demon.net!mutlu.news.demon.net!demon!mail2news.demon.co.uk!devnull From: gennaro_prota@yahoo.com (Gennaro Prota) Newsgroups: comp.std.c++ Subject: Re: Proposal for a header Date: Wed, 24 Mar 2004 09:14:18 +0000 (UTC) Organization: [Infostrada] Lines: 30 Approved: fjh@cs.mu.oz.au (Fergus Henderson , moderator of comp.std.c++) Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: mail2news.demon.co.uk 1080119658 26238 10.0.0.1 (24 Mar 2004 09:14:18 GMT) X-Complaints-To: abuse@demon.net NNTP-Posting-Date: Wed, 24 Mar 2004 09:14:18 +0000 (UTC) X-Received: from mulga.cs.mu.oz.au ([128.250.1.22]) by news.demon.co.uk with esmtp (Exim 4.12) id 1B64Sn-0006om-00 for mail2news@news.news.demon.net; Wed, 24 Mar 2004 09:14:18 +0000 X-Received: from mulga.cs.mu.OZ.AU (localhost [127.0.0.1]) by mulga.cs.mu.OZ.AU with ESMTP id i2O9EGi2024561; Wed, 24 Mar 2004 20:14:16 +1100 (EST) X-Received: (from fjh@localhost) by mulga.cs.mu.OZ.AU (8.12.10+Sun/8.12.9/Submit) id i2O9EFp9024551; Wed, 24 Mar 2004 20:14:15 +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++@ucar.edu X-Newsgroups: comp.std.c++ X-Newsreader: Forte Agent 1.93/32.576 English (American) X-NNTP-Posting-Date: Fri, 19 Mar 2004 13:48:52 MET X-Spam-Checker-Version: SpamAssassin 2.60-mulga_r1 (1.212-2003-09-23-exp) on mulga.cs.mu.OZ.AU X-Spam-Status: No, hits=0.4 required=5.2 tests=AWL,FORGED_YAHOO_RCVD autolearn=no version=2.60-mulga_r1 Xref: archiver1.google.com comp.std.c++:1375 On Fri, 19 Mar 2004 01:12:38 +0000 (UTC), please_use_webform@vecerina.com ("Ivan Vecerina") wrote: >It is easy to do, but it cannot be done for standard classes, >because mere users cannot make all required assumptions about >the default parameters of standard templates (or even IIRC >about the potential additional parameters). There was a school of thought that believed implementations can add defaulted parameters (as SGI and its derivations used to do for std::bitset). But the committee clarified that this is illegal: http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/lwg-closed.html#94 The problems that still exist are that a) adding declarations of standard classes to namespace std results in undefined behavior if the declarations do not depend on a user-defined name with external linkage b) default arguments for template parameters cannot be given twice in the same scope. -- Genny. --- [ 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 ]