220 11789 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: N4078: Rvalue reference overloads for value() method returns object by value Date: Thu, 10 Jul 2014 09:27:55 +0300 Lines: 36 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> <3EF9F5C2-EF9D-4DC5-9F53-82CA1155D4DF@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1404973684 31653 80.91.229.3 (10 Jul 2014 06:28:04 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 10 Jul 2014 06:28:04 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRB27E7COQKGQE5ENN5FI@isocpp.org Thu Jul 10 08:27:57 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ie0-f200.google.com ([209.85.223.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1X57pl-0007Qj-8h for gclcip-std-proposals@m.gmane.org; Thu, 10 Jul 2014 08:27:57 +0200 Original-Received: by mail-ie0-f200.google.com with SMTP id tp5sf3678162ieb.7 for ; Wed, 09 Jul 2014 23:27:56 -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:content-transfer-encoding; bh=8URkKXp3+zyI2/8Ery0U3tsm7NYFbQEMqiFd/S21frA=; b=aokAtsNTeACrZ+bMER/rUzTDPpK3kdlOtpZkZMKthHDQqoDc8JQba3ZkscRzOnpzm8 m6lo+NtHaurACKTlbMmiHYExDUxu9BNW3RUuAZImxmLHoyXbwZMikqShkX5nQNUPz5Ux GUzXYRoYfWQF5lAG4XZrNztO/b3B9NmBIecPmn08jV+cvXuBHC5rxFIE6DMV5069BcC6 JG51chMYXgjejSwqRyFcFkaF/9TGDU7A27sUfTmUhemg+Q/jU1SA/3KvZMYdfV2Xvlwe fkeTClIHJRi0D93dufwTKaOleh/uApHHd+JcrBnbAjxH0/ri3pEzAKCKcTOWchXSinUn ZWug== X-Gm-Message-State: ALoCoQlkynbly3uRxKGhbMBXMaKc//6qKu26E7pbO550GyPT18GTN6PMVmYeT+4Uz5kmbPzReDTZ X-Received: by 10.182.213.37 with SMTP id np5mr23039466obc.36.1404973676361; Wed, 09 Jul 2014 23:27:56 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.32.203 with SMTP id h69ls2734500qgh.56.gmail; Wed, 09 Jul 2014 23:27:55 -0700 (PDT) X-Received: by 10.140.19.109 with SMTP id 100mr74287593qgg.80.1404973675790; Wed, 09 Jul 2014 23:27:55 -0700 (PDT) Original-Received: from mail-qc0-x22c.google.com (mail-qc0-x22c.google.com [2607:f8b0:400d:c01::22c]) by mx.google.com with ESMTPS id h17si564785qar.70.2014.07.09.23.27.55 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 09 Jul 2014 23:27:55 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c01::22c as permitted sender) client-ip=2607:f8b0:400d:c01::22c; Original-Received: by mail-qc0-f172.google.com with SMTP id l6so331799qcy.3 for ; Wed, 09 Jul 2014 23:27:55 -0700 (PDT) X-Received: by 10.140.97.227 with SMTP id m90mr71038262qge.15.1404973675452; Wed, 09 Jul 2014 23:27:55 -0700 (PDT) Original-Received: by 10.224.31.137 with HTTP; Wed, 9 Jul 2014 23:27:55 -0700 (PDT) In-Reply-To: <3EF9F5C2-EF9D-4DC5-9F53-82CA1155D4DF@gmail.com> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c01::22c as permitted sender) smtp.mail=ville.voutilainen@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:11789 Archived-At: On 10 July 2014 09:22, David Krauss wrote: > > On 2014=E2=80=9307=E2=80=9310, at 2:17 PM, Ville Voutilainen > wrote: > > Returning by rvalue reference may be tempting, but that is the semantic o= f > move(). It does not transfer ownership, it only provides the caller with = a > handle to accept ownership. Returning an rvalue reference is something on= ly > special functions should do. > > > I have no idea where this guideline popped out of. > > > Which part? Name three functions that return an rvalue reference. There= =E2=80=99s > move(), forward(), and ??? . get() from a pair rvalue, get() from a tuple rvalue, get() from an array rv= alue. --=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/. .