220 11843 article Path: news.gmane.org!not-for-mail From: Andrzej Krzemienski Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: N4078: Rvalue reference overloads for value() method returns object by value Date: Fri, 11 Jul 2014 11:06:21 +0200 Lines: 78 Approved: news@gmane.org Message-ID: References: <4DA018C3-2327-4F55-B7F8-7988EC7B789A@gmail.com> <1a858a77-310b-4591-aaf5-960c40d9f5fc@isocpp.org> <66AF41C1-CB37-4311-98EA-D47DBC6068DC@gmail.com> <66c38b61-7a95-4ace-b34f-2346bb334fb9@isocpp.org> <6F4B3C72-9962-48DC-8527-0C89EA1B9710@gmail.com> <35873CE5-ED8C-4C03-A6A1-E4132DECD91F@gmail.com> <335948E6-8140-4673-B958-930356A52070@gmail.com> <76ACA175-5A44-4BE8-B49F-BAC6DA65E6B1@gmail.com> <4D3852AD-1AEB-44BA-941C-D645BAD19405@gmail.com> <6a4b6425-1167-40c1-acd8-3945c8cd4c74@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=f46d0442848452aaee04fde7416a X-Trace: ger.gmane.org 1405069594 17397 80.91.229.3 (11 Jul 2014 09:06:34 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 11 Jul 2014 09:06:34 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDT2DGOJ34DBBD6S72OQKGQE2R5SRGQ@isocpp.org Fri Jul 11 11:06:24 2014 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 1X5Wme-0006MP-9e for gclcip-std-proposals@m.gmane.org; Fri, 11 Jul 2014 11:06:24 +0200 Original-Received: by mail-la0-f72.google.com with SMTP id ty20sf150482lab.3 for ; Fri, 11 Jul 2014 02:06:24 -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:in-reply-to:references:date :message-id:subject:from: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=njlZNoUSWMGEn7K2S5bgeUTWaeV62dia4eowy9QNAUU=; b=T3Z82PhfW/u/y9538zc3JTWBQgnv3aZAx4k5EUd1unPOQknQhYz9Zxbby/Lw6zX3yZ OxZ9OHGywGzvm84vOYc6IeTvFQlqWqAKxrhupXmyIQ/GXdtBFVZrnFBusBS7k/zLjh62 OgtxS5LD/ymzvPDEEq/eO51o2heTsLjLB5TvBjhpGDwZdZsJNymnw66OHo438wVTMtGO h0xLv1zSiq6ukRaSh2ec0a5Qmwym/Cyd9xcEJ3NU8f6wSyMCbFmnRB8rSkiNRjwPWb8m ogJnZru4OlIaLzCXJ1DXKSFQ8kfiIYD7a+TVqWaQUHzTgkRwya25mTD9vt92mE8DUdbL qO6w== X-Gm-Message-State: ALoCoQmto1Ue07ozlijpr3B676+l16hiNaZuAyYBZ76/UKLOqnIu2SKIR/C7Fs8H+MOZP5JzVgkS X-Received: by 10.152.9.228 with SMTP id d4mr5660369lab.1.1405069584018; Fri, 11 Jul 2014 02:06:24 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.77.41 with SMTP id p9ls57465wiw.17.canary; Fri, 11 Jul 2014 02:06:22 -0700 (PDT) X-Received: by 10.194.90.228 with SMTP id bz4mr64704065wjb.65.1405069582857; Fri, 11 Jul 2014 02:06:22 -0700 (PDT) Original-Received: from mail-wg0-x22e.google.com (mail-wg0-x22e.google.com [2a00:1450:400c:c00::22e]) by mx.google.com with ESMTPS id xn13si2694852wib.13.2014.07.11.02.06.22 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 11 Jul 2014 02:06:22 -0700 (PDT) Received-SPF: pass (google.com: domain of akrzemi1@gmail.com designates 2a00:1450:400c:c00::22e as permitted sender) client-ip=2a00:1450:400c:c00::22e; Original-Received: by mail-wg0-f46.google.com with SMTP id m15so728396wgh.5 for ; Fri, 11 Jul 2014 02:06:22 -0700 (PDT) X-Received: by 10.180.94.104 with SMTP id db8mr3194113wib.23.1405069582050; Fri, 11 Jul 2014 02:06:22 -0700 (PDT) Original-Received: by 10.194.152.42 with HTTP; Fri, 11 Jul 2014 02:06:21 -0700 (PDT) In-Reply-To: X-Original-Sender: akrzemi1@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of akrzemi1@gmail.com designates 2a00:1450:400c:c00::22e as permitted sender) smtp.mail=akrzemi1@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) header.from=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:11843 Archived-At: --f46d0442848452aaee04fde7416a Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable 2014-07-11 11:03 GMT+02:00 Olaf van der Spek : > > > On Friday, July 11, 2014 9:40:16 AM UTC+2, Andrzej Krzemie=C5=84ski wrote= : >> >> So we are not reverting the change. We change further. >> >> Am I right? >> >> > I think you are. Though do we still need the & overload if we've got the > && overload? > sure we do. E.g. in order to allow the following use case: optiona oi =3D readVal(); if (oi && *oi < 0) *oi =3D 0; return oi; --=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/. --f46d0442848452aaee04fde7416a Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable



2014-07-11 11:03 GMT+02:00 Olaf van der Spek <= olafvdspek@gmail.= com>:


On = Friday, July 11, 2014 9:40:16 AM UTC+2, Andrzej Krzemie=C5=84ski wrote:
So we are not reverting the change. We change further.
=
Am I right?


I think= you are. Though do we still need the & overload if we've got the &= amp;& overload?=C2=A0

sure we do. E.g. in order to allow t= he following use case:

optiona<int> oi =3D readVal(= );
if (oi && *oi < 0) *oi =3D 0;
ret= urn oi;

--

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