220 11761 article Path: news.gmane.org!not-for-mail From: Nevin Liber Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: N4078: Rvalue reference overloads for value() method returns object by value Date: Wed, 9 Jul 2014 15:47:53 -0500 Lines: 69 Approved: news@gmane.org Message-ID: References: <2555993.7LIlHKVULI@tjmaciei-mobl4> <6c7ffd99-5dc4-41c6-b9b5-8c04a3248974@isocpp.org> <3e3e5f1f-7c62-4d03-a084-a49932059a0e@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=089e0122f2aadf1b2704fdc8d40b X-Trace: ger.gmane.org 1404938929 23302 80.91.229.3 (9 Jul 2014 20:48:49 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 9 Jul 2014 20:48:49 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCE35H5S6IDBBIWV62OQKGQEHPRRTHY@isocpp.org Wed Jul 09 22:48:42 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wi0-f197.google.com ([209.85.212.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1X4yn6-0006L6-5s for gclcip-std-proposals@m.gmane.org; Wed, 09 Jul 2014 22:48:36 +0200 Original-Received: by mail-wi0-f197.google.com with SMTP id n3sf1875616wiv.0 for ; Wed, 09 Jul 2014 13:48:35 -0700 (PDT) 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=jmRfvgyKOVWY6iXTqUqrJVEHnM1/DTJNj41zXJeQGDI=; b=Mor9eb7n3ywu5hWYtR3jtOGe089vMpb3uC6C+s92hGnG/I3WwPorlFUSLBskfhMyG/ 79OvmtW8H6HJvnzFQYnr/ujRKBB25b1W9M1wPkRHagGyZPIgGGQTYucLPvPB6DcwGdRS oegLHQW08ZOe4voywZJX1iQXtq031CVJJ3wxbYFRUNKpTAXkbIhGMiqHOdAS6hMFv4q1 u+Fo4+ugsO6CG3sLEww0rxDdoVggPA/DHW+UUxS+OS+SvA7RosvEAJBqSiURGltztrQH mqcWkBs6Vw629UG7p/5wI2IthZMehPIQuSNPxPUHaKkWRqUO/5+u2GcwbDFEE6dJk4L6 yT/w== X-Gm-Message-State: ALoCoQnWz87R2cRS0s/bC1x6KrM3R0q4SwYLUKGbYdF/ZCkiSmpEFIVkjpTkjCb15t3OSvYK6yII X-Received: by 10.180.20.140 with SMTP id n12mr1332294wie.7.1404938915750; Wed, 09 Jul 2014 13:48:35 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.105.195 with SMTP id go3ls316500wib.36.canary; Wed, 09 Jul 2014 13:48:34 -0700 (PDT) X-Received: by 10.194.90.77 with SMTP id bu13mr51717809wjb.92.1404938914023; Wed, 09 Jul 2014 13:48:34 -0700 (PDT) Original-Received: from mail-we0-x22e.google.com (mail-we0-x22e.google.com [2a00:1450:400c:c03::22e]) by mx.google.com with ESMTPS id bs20si9612742wib.80.2014.07.09.13.48.33 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 09 Jul 2014 13:48:33 -0700 (PDT) Received-SPF: pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c03::22e as permitted sender) client-ip=2a00:1450:400c:c03::22e; Original-Received: by mail-we0-f174.google.com with SMTP id u57so8040248wes.5 for ; Wed, 09 Jul 2014 13:48:33 -0700 (PDT) X-Received: by 10.194.158.101 with SMTP id wt5mr5901624wjb.136.1404938913518; Wed, 09 Jul 2014 13:48:33 -0700 (PDT) Original-Sender: nliber@gmail.com Original-Received: by 10.194.122.71 with HTTP; Wed, 9 Jul 2014 13:47:53 -0700 (PDT) In-Reply-To: <3e3e5f1f-7c62-4d03-a084-a49932059a0e@isocpp.org> 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:c03::22e 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:11761 Archived-At: --089e0122f2aadf1b2704fdc8d40b Content-Type: text/plain; charset=UTF-8 On 9 July 2014 15:25, wrote: > FWIW, I agree with the point made that fixing single case of dangling > reference from "optional::value() &&" while sacrificing performance and > (more importantly) library consistency is not worth it. Personally I would > prefer if value() && overload returned rvalue-reference rather than value. > Personally, I would prefer that a function we call value() actually return something by value. But I suppose that is part of a different discussion, since it doesn't now... -- 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/. --089e0122f2aadf1b2704fdc8d40b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On 9 July 2014 15:25, <b.kozicki@gmail.com> wrote:
FWIW, I agree with the point made that fixing single = case of dangling reference from "optional<R>::value() &&= " while sacrificing performance and (more importantly) library consist= ency is not worth it. Personally I would prefer if value() && overl= oad returned rvalue-reference rather than value.

Personally, I would prefer that a fu= nction we call value() actually return something by value. =C2=A0But I supp= ose that is part of a different discussion, since it doesn't now...
--
=C2=A0Nevin ":-)" Liber=C2=A0 <mailto:nevin@eviloverlord.com= >=C2=A0 (847) 691-1404

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