220 8948 article Path: news.gmane.org!not-for-mail From: Nevin Liber Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: String to T conversions - getting it right this time Date: Thu, 30 Jan 2014 10:44:54 -0600 Lines: 76 Approved: news@gmane.org Message-ID: References: <097fb6c8-56f9-433e-a2f0-8c0f69609bf0@isocpp.org> <34c26aca-59cf-4254-9ab1-31a403d4a3db@isocpp.org> <52E95CDE.40007@knejp.de> <52E9FAE5.9090906@wanadoo.fr> <52EA1995.7020803@knejp.de> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a11c3841a44eadd04f132c9c4 X-Trace: ger.gmane.org 1391100330 20541 80.91.229.3 (30 Jan 2014 16:45:30 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 30 Jan 2014 16:45:30 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCE35H5S6IDBBL4DVKLQKGQEIYTU4GQ@isocpp.org Thu Jan 30 17:45:39 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f71.google.com ([209.85.215.71]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1W8ukC-0005mg-HL for gclcip-std-proposals@m.gmane.org; Thu, 30 Jan 2014 17:45:36 +0100 Original-Received: by mail-la0-f71.google.com with SMTP id c6sf6964329lan.2 for ; Thu, 30 Jan 2014 08:45:36 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type; bh=7iZnmRisSLlmv6K1PpVA9obnzwDSMYOpoRmihPo9cMA=; b=MKkB4vGjjS8+vJ7DRPnPuX6UEBRbrhIpx5lsm/hB8STt0N0Jy/zi2ZekPNcunspL54 nR8AYTOK4WrWg435WSVMm3bdPSPBbEklMSdwrhUdfS9dq/4gSJIxiRZJIqp2SKNG6n9w 11/ssc1U/pDC+3nOYHfTsHGeX/13Yh634uEVof0rp0W1VnLmzjLLbrcbQLNPdbsrUpUK oY15tKis9LagU3U58qArHTcxQFCnBkMXyc7rbP1FA/qzTOwUXw0NP39T362ZJcdSjob5 oyfVhdNTwDUWrbq/mvQfhkt+i3h2hs3fTzp6vMDy11gr0FWCLvLbuwbkXqgJJ46AUDcn DCzA== X-Gm-Message-State: ALoCoQmt8jkR/s0LdnX9Auwj71SF8OtxHiAiNaOpQe5vRnwbh/H1394Mc5tvD+wY2uqeEl//39J4 X-Received: by 10.204.179.68 with SMTP id bp4mr3749272bkb.7.1391100336173; Thu, 30 Jan 2014 08:45:36 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.90.233 with SMTP id bz9ls1547853wib.51.canary; Thu, 30 Jan 2014 08:45:34 -0800 (PST) X-Received: by 10.194.189.40 with SMTP id gf8mr5169905wjc.14.1391100334603; Thu, 30 Jan 2014 08:45:34 -0800 (PST) Original-Received: from mail-wg0-x22f.google.com (mail-wg0-x22f.google.com [2a00:1450:400c:c00::22f]) by mx.google.com with ESMTPS id r1si3351050wjy.130.2014.01.30.08.45.34 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 30 Jan 2014 08:45:34 -0800 (PST) Received-SPF: pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c00::22f as permitted sender) client-ip=2a00:1450:400c:c00::22f; Original-Received: by mail-wg0-f47.google.com with SMTP id m15so6825192wgh.14 for ; Thu, 30 Jan 2014 08:45:34 -0800 (PST) X-Received: by 10.180.188.197 with SMTP id gc5mr10217330wic.30.1391100334236; Thu, 30 Jan 2014 08:45:34 -0800 (PST) Original-Sender: nliber@gmail.com Original-Received: by 10.194.121.163 with HTTP; Thu, 30 Jan 2014 08:44:54 -0800 (PST) In-Reply-To: X-Original-Sender: nevin@eviloverlord.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c00::22f as permitted sender) smtp.mail=nliber@gmail.com; dkim=pass header.i=@gmail.com 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:8948 Archived-At: --001a11c3841a44eadd04f132c9c4 Content-Type: text/plain; charset=ISO-8859-1 On 30 January 2014 06:49, Bengt Gustafsson wrote: > > > The Boost::expected template suggested by Miro comes close to what I want, > but does not make sure that the error code was checked in its dtor, which I > think was the main feature of my proposed error_return class. > You do know that it is extremely unlikely for a class which throws from its destructor to be approved by the committee anytime soon, right? First you would need to address the issues brought up in the article and discussion at . Besides, it seems to me it ought to assert, not throw, as I can't imagine any circumstance where this isn't a programming bug. -- Nevin ":-)" Liber (847) 691-1404 -- --- 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-proposals/. --001a11c3841a44eadd04f132c9c4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On 30 January 2014 06:49, Bengt Gustafsson <b= engt.gustafsson@beamways.com> wrote:


The Boost::expected template suggested by Miro comes close = to what I want, but does not make sure that the error code was checked in i= ts dtor, which I think was the main feature of my proposed error_return cla= ss.

You do know that it is extremely unl= ikely for a class which throws from its destructor to be approved by the co= mmittee anytime soon, right?=A0 First you would need to address the issues = brought up in the article and discussion at <http://cpp-next.com/archiv= e/2012/08/evil-or-just-misunderstood/>.

Besides, it seems to me it ought to assert, not throw, as I = can't imagine any circumstance where this isn't a programming bug.<= br>
--
=A0Nevin ":-)" Liber=A0 <mailto:nevin@eviloverlord.com= >=A0 (847) 691-1404

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