From -4645628073328886340 X-Google-Thread: f78e5,860edfd5ffaa1c7d X-Google-Attributes: gidf78e5,public X-Google-Language: ENGLISH,ASCII Path: g2news1.google.com!news3.google.com!news.glorb.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local01.nntp.dca.giganews.com!nntp.speakeasy.net!news.speakeasy.net.POSTED!not-for-mail NNTP-Posting-Date: Wed, 29 Jun 2005 10:00:17 -0500 Return-Path: X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) Delivered-To: std-c++@ucar.edu From: kanze@gabi-soft.fr Newsgroups: comp.std.c++ Subject: Re: C++ naming ... a wide subject Organization: http://groups.google.com Message-ID: <1120044512.173084.186920@g43g2000cwa.googlegroups.com> References: <42c07be7$0$38043$5a6aecb4@news.aaisp.net.uk> <42c1103c$0$20188$4d4ebb8e@businessnews.de.uu.net> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Complaints-To: groups-abuse@google.com User-Agent: G2/0.2 Complaints-To: groups-abuse@google.com Injection-Info: g43g2000cwa.googlegroups.com; posting-host=62.160.54.162; posting-account=qsfl8gwAAABZGaLp2a7FeTfDkJamzWYW X-Virus-Scanned: amavisd-new at ucar.edu Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mailman.ucar.edu id j5TBT8dc001425 X-Virus-Scanned: amavisd-new at cs.mu.OZ.AU Approved: Fergus Henderson , moderator of comp.std.c++ X-Virus-Scanned: amavisd-new at cs.mu.OZ.AU Date: Wed, 29 Jun 2005 09:54:40 CST Lines: 50 NNTP-Posting-Host: 65.182.171.162 X-Trace: sv3-BFjmxtq/sKTgxkdWUQlvXIKDNp74to8o2YsNmSXrQdtO0WYiOnuj2KWO1OMxOlRz101n9AIA3OHeQRE!QtDn+qWd7k0cn0SxbKIofloDryGsT3FcFD5jLRdsyrEtZu1+824z+ouiZlS0RGG6Ha1MZ22rl4VS!th5/yT5oPZmrcNIpEhkqUj3iiECs5Zta/50jTuqDSIo= X-Complaints-To: abuse@speakeasy.net X-DMCA-Complaints-To: abuse@speakeasy.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.32 Xref: g2news1.google.com comp.std.c++:5301 "Andrei Alexandrescu See Website For Email wrote: > Daniel Kr�gler wrote: > > I always wondered, how Java could live with the essential > > double-casting idiom > > if (x instanceof Foo) { > > Foo f = (Foo) x; > > } > It is an inconvenience to the programmer; for the record, > that's a low-hanging fruit for the simplest optimizers. I don't think Daniel's point concerned runtime. It's a potential source of errors -- I have to repeat the name of the class three times in order to say I want to use it. And an error in the first instance won't even cause a compile time error. Note that certain people consider the fact that I have to repete the name of the type twice in C++ is a weakness, and propose typeof or something like that as an improvement. (And of course, the original problem can be solved with only repeating the name twice in Java: try { Foo f = (Foo) x ; // ... } catch ( ClassCastException error ) { System.out.print( "..." ) ; } I don't like it; if forces you to put the short, exceptional case at the end, whereas I prefer to keep the shorter branch near the top. Not to mention that "exception" says something that I may not mean here.) -- James Kanze GABI Software Conseils en informatique orient�e objet/ Beratung in objektorientierter Datenverarbeitung 9 place S�mard, 78210 St.-Cyr-l'�cole, France, +33 (0)1 30 23 00 34 --- [ 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 ]