220 3698 <183CB42B-6923-44A7-917A-A57638EF62E2@hsr.ch> article Path: news.gmane.org!not-for-mail From: Peter Sommerlad Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Dnnnn - RAII classes... Date: Sat, 13 Apr 2013 13:18:48 +0200 Lines: 87 Approved: news@gmane.org Message-ID: <183CB42B-6923-44A7-917A-A57638EF62E2@hsr.ch> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 6.3 \(1503\)) Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1365851922 14601 80.91.229.3 (13 Apr 2013 11:18:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 13 Apr 2013 11:18:42 +0000 (UTC) To: , Andrew Sandoval Original-X-From: std-proposals+bncBD3OHQEN4AJBBE76USFQKGQEQZNTMHI@isocpp.org Sat Apr 13 13:18:46 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f72.google.com ([209.85.215.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1UQyTk-0003Mf-Qt for gclcip-std-proposals@m.gmane.org; Sat, 13 Apr 2013 13:18:44 +0200 Original-Received: by mail-la0-f72.google.com with SMTP id fr10sf4579470lab.7 for ; Sat, 13 Apr 2013 04:18:44 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:x-beenthere:x-received:received-spf:mime-version:subject :from:in-reply-to:date:message-id:references:to:x-mailer :x-originating-ip:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-google-group-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type :content-transfer-encoding; bh=QwKaVh8IdA7J4ixTrn0z5ei1yMr5caDwv6FHFT6GUgQ=; b=bLZfk59cjy4z8qLXps4a85q+ArwLFIjKZXFJ0nhWkOpDV16GF5kVjI0sqPRoI1C06x yHkNTa3w+wbQY0RokO2rT1iVamelS3LGFWggQlipf8mgtUmYERielinGbYkzjs8ltgqK z/hV4Yo2yQ59iE+99N75nRapfsE/Jnj8gbOOZG4fX/RBujhiKflIppZubhplSZ0+zpaw P2Y8G4UJWQVYTud2X88Ahgqr7EBEtctlUyfvGEBJNaA90d2j8zunhE1MjG63Tr/tgSN+ X-Received: by 10.180.106.73 with SMTP id gs9mr729476wib.2.1365851923882; Sat, 13 Apr 2013 04:18:43 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.90.48 with SMTP id bt16ls167652wib.9.canary; Sat, 13 Apr 2013 04:18:42 -0700 (PDT) X-Received: by 10.194.81.71 with SMTP id y7mr22578538wjx.19.1365851922562; Sat, 13 Apr 2013 04:18:42 -0700 (PDT) Original-Received: from mx1.hsr.ch (mx1.hsr.ch. [2001:620:130:a036::50]) by mx.google.com with ESMTP id f3si17158718eev.17.2013.04.13.04.18.42; Sat, 13 Apr 2013 04:18:42 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of psommerl@hsr.ch designates 2001:620:130:a036::50 as permitted sender) client-ip=2001:620:130:a036::50; Original-Received: from localhost (localhost [127.0.0.1]) by mx1.hsr.ch (Postfix) with ESMTP id 05CF09CBC; Sat, 13 Apr 2013 13:18:42 +0200 (CEST) Original-Received: from mx1.hsr.ch ([127.0.0.1]) by localhost (mx1.hsr.ch [127.0.0.1]) (amavisd-new, port 10024) with LMTP id LTD1x-5CotX1; Sat, 13 Apr 2013 13:18:41 +0200 (CEST) Original-Received: from webmail.hsr.ch (sid00200.hsr.ch [152.96.21.200]) by mx1.hsr.ch (Postfix) with ESMTP id 3363D9B36; Sat, 13 Apr 2013 13:18:41 +0200 (CEST) Original-Received: from [10.110.6.102] (152.96.21.55) by smtp.hsr.ch (152.96.21.200) with Microsoft SMTP Server (TLS) id 14.3.123.3; Sat, 13 Apr 2013 13:18:40 +0200 In-Reply-To: X-Mailer: Apple Mail (2.1503) X-Originating-IP: [152.96.21.55] X-Original-Sender: peter.sommerlad@hsr.ch X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of psommerl@hsr.ch designates 2001:620:130:a036::50 as permitted sender) smtp.mail=psommerl@hsr.ch Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:3698 Archived-At: the loop advancement example is not very convincing because it can easily b= e dealt with by using for() instead of while() which is much simpler than t= he alternative you are proposing. I also wonder if an local struct with a destructor and a corresponding vari= able wouldn't be simpler than the scoped example or alternatives like uniqu= e_ptr or shared_ptr or boost::scoped_ptr that already provide much of the f= unctionality you are proposing. The example given as Motivation B calls for a dedicated RAII class for Crit= icalSection IMHO, so again not very convincing. IMHO it would greatly improve your paper if you would provide additional ex= amples showing the "uglyness" of using existing alternatives to your propos= al, i.e., DIY local structs with destructors, or "misusing" unique_ptr/shar= ed_ptr for that purpose, in contrast to scoped_function and scoped_resource= .. Also providing the no-delete value is not very convincing. What if all valu= es less than zero are "no-delete", or 7, 23 and 42? It complicates the clas= s and API and doesn't serve a general purpose. Usually a predicate is used = in other cases to provide a hook for bool checks. Just my CHF0.02 from a quick scan. Peter. On 12.04.2013, at 23:54, Andrew Sandoval wrote= : > I've requested a document number on this but haven't received it yet. In= the meantime I wanted to make sure that the latest version of the document= was available for review. It is here: http://www.andrewlsandoval.com/scope= _exit/scope_exit.h >=20 > Please be kind. I'm not sure I am even in the ballpark on the "standarde= se" section, but it was very painful and time consuming (something I never = have enough of to start with) to put together. >=20 > Thank you, and thanks to everyone that has contributed feedback thus far = on this proposal. >=20 > -Andrew Sandoval >=20 > --=20 > =20 > ---=20 > You received this message because you are subscribed to the Google Groups= "ISO C++ Standard - Future Proposals" group. > To unsubscribe from this group and stop receiving emails from it, send an= email to std-proposals+unsubscribe@isocpp.org. > To post to this group, send email to std-proposals@isocpp.org. > Visit this group at http://groups.google.com/a/isocpp.org/group/std-propo= sals/?hl=3Den. > =20 > =20 > --=20 Prof. Peter Sommerlad Institut f=FCr Software: Bessere Software - Einfach, Schneller! HSR Hochschule f=FCr Technik Rapperswil Oberseestr 10, Postfach 1475, CH-8640 Rapperswil http://ifs.hsr.ch http://cute-test.com http://linticator.com http://includa= tor.com tel:+41 55 222 49 84 =3D=3D mobile:+41 79 432 23 32 fax:+41 55 222 46 29 =3D=3D mailto:peter.sommerlad@hsr.ch --=20 ---=20 You received this message because you are subscribed to the Google Groups "= ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposa= ls/?hl=3Den. .