From 5653484003842923360 X-Google-Thread: f78e5,174aa7b34b06a51 X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news3.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newscon06.news.prodigy.com!prodigy.net!newsfeed-00.mathworks.com!peer-uk.news.demon.net!kibo.news.demon.net!news.demon.co.uk!demon!stump.algebra.com!devnull From: SeeWebsiteForEmail@moderncppdesign.com ("Andrei Alexandrescu (See Website For Email)") Newsgroups: comp.std.c++ Subject: Re: Is this really unspecified behavior? Date: Tue, 20 Dec 2005 05:52:33 GMT Organization: Computer Science & Engineering, U of Washington, Seattle Lines: 27 Sender: mail2news@demon.net Approved: fjh@cs.mu.oz.au (Fergus Henderson , moderator of comp.std.c++) Message-ID: References: <1132759176.368850.264850@g43g2000cwa.googlegroups.com> <1132933832.802917.153350@g14g2000cwa.googlegroups.com> <1133551647.532929.325730@z14g2000cwz.googlegroups.com> <1133583412.951239.208510@g49g2000cwa.googlegroups.com> <1133910546.716987.80030@g14g2000cwa.googlegroups.com> <0l5ep1ppfhdj5p1pcu7e4na4ub0vjajlq3@4ax.com> <87oe3e8e0c.fsf@boost-consulting.com> <87fyop6yyz.fsf@boost-consulting.com> NNTP-Posting-Host: news.news.demon.net Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: news.demon.co.uk 1135057974 3755 158.152.254.254 (20 Dec 2005 05:52:54 GMT) X-Complaints-To: abuse@demon.net NNTP-Posting-Date: Tue, 20 Dec 2005 05:52:54 +0000 (UTC) X-Nntp-Posting-Host: parakeet.ee.washington.edu X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.10) Gecko/20050716 Thunderbird/1.0.6 Mnenhy/0.7.2.0 X-Accept-Language: en-us, en X-Virus-Scanned: amavisd-new at cs.mu.OZ.AU X-Path: comp-std-cpp-robomod!not-for-mail X-Received: (from fjh@localhost) by mulga.cs.mu.OZ.AU (8.12.10+Sun/8.12.9/Submit) id jBK5qX8t010639; Tue, 20 Dec 2005 16:52:33 +1100 (EST) 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++:2853 David Abrahams wrote: > SeeWebsiteForEmail@moderncppdesign.com ("Andrei Alexandrescu (See Website For Email)") writes: >>Very nice! And to that I'd add: "Programs must be written for people >>to read, and only incidentally for machines to execute" - Abelson and >>Sussman. > > > Oh, I'm _very_ big on that one. I don't think decorating all the > high-performance numerics code with some "allow unordered evaluation" > construct is a good way to keep them readable, though. I work with (and hack into) a high-performance math package (the QuickNet neural network library) a daily basis. For that library, unordered evaluation would not be useful. Please show examples taken from real high-performance numeric code where unordered evaluation would make a difference. Andrei --- [ 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 ]