220 6847 article Path: news.gmane.org!not-for-mail From: =?UTF-8?Q?Klaim_=2D_Jo=C3=ABl_Lamotte?= Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: auto with copy in expression Date: Tue, 1 Oct 2013 18:04:23 +0200 Lines: 37 Approved: news@gmane.org Message-ID: References: <65473e60-c6ee-48e4-ae03-fcbe251d7b9d@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=047d7b33d1762f227b04e7b01b3d X-Trace: ger.gmane.org 1380643463 19384 80.91.229.3 (1 Oct 2013 16:04:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 1 Oct 2013 16:04:23 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBD3NR2WQQ4IBBB7FVOJAKGQELWH777Q@isocpp.org Tue Oct 01 18:04:25 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-oa0-f70.google.com ([209.85.219.70]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VR2Qz-00027r-4w for gclcip-std-proposals@m.gmane.org; Tue, 01 Oct 2013 18:04:25 +0200 Original-Received: by mail-oa0-f70.google.com with SMTP id g12sf23104212oah.5 for ; Tue, 01 Oct 2013 09:04:24 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=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=u5GbMBySZXwoiaMEOdlk3kmmkQH++J/rTjBrTuHMQKU=; b=j0/TnhWIwN2s0i3g7AC7Sjf87qQBnNCXYmta0GR3OT9WObHaOjObFikTFzQLI3TPR5 Bq3aCayKHNjOE9/QdGvJJsn82xYoJ3pXLSjVIdK49iSfl3deTPcoKjW0tSBWGzDxP7SZ gRH3SDBZebmLWH8XA8MRLtZjWJHxx2HeaxIpOAJC/XuU3vYmMfuBob9kKgK468/HeTEr eo8NNyopFo08MJMgRc6Gh8P8D7ptYowj9CLnfCGPM/fXjFruvjvVx0KIoUmr3o1VmxXv 81tPlD9Q321NAvgkKJbQ+Z8axZv1MWx/ftHmVMBvP4BK0I0qufZwO5KMpzAZHpEmO/YQ oqsA== X-Received: by 10.43.151.16 with SMTP id kq16mr16750109icc.22.1380643464095; Tue, 01 Oct 2013 09:04:24 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.103.1 with SMTP id fs1ls2631486igb.23.canary; Tue, 01 Oct 2013 09:04:23 -0700 (PDT) X-Received: by 10.60.58.10 with SMTP id m10mr435741oeq.61.1380643463324; Tue, 01 Oct 2013 09:04:23 -0700 (PDT) Original-Received: from mail-oa0-x22f.google.com (mail-oa0-x22f.google.com [2607:f8b0:4003:c02::22f]) by mx.google.com with ESMTPS id g1si5056676oej.28.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 01 Oct 2013 09:04:23 -0700 (PDT) Received-SPF: pass (google.com: domain of mjklaim@gmail.com designates 2607:f8b0:4003:c02::22f as permitted sender) client-ip=2607:f8b0:4003:c02::22f; Original-Received: by mail-oa0-f47.google.com with SMTP id i1so5047267oag.34 for ; Tue, 01 Oct 2013 09:04:23 -0700 (PDT) X-Received: by 10.60.93.67 with SMTP id cs3mr26884587oeb.12.1380643463155; Tue, 01 Oct 2013 09:04:23 -0700 (PDT) Original-Received: by 10.76.128.177 with HTTP; Tue, 1 Oct 2013 09:04:23 -0700 (PDT) In-Reply-To: X-Original-Sender: mjklaim@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of mjklaim@gmail.com designates 2607:f8b0:4003:c02::22f as permitted sender) smtp.mail=mjklaim@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:6847 Archived-At: --047d7b33d1762f227b04e7b01b3d Content-Type: text/plain; charset=ISO-8859-1 If my memory is correct, the proposal for decltype(auto) should fix the issue? That is: decltype(auto) result = foo(); // result is always a copy I'm not totally sure though. -- --- 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/. --047d7b33d1762f227b04e7b01b3d Content-Type: text/html; charset=ISO-8859-1
If my memory is correct, the proposal for decltype(auto) should fix the issue?
That is:

decltype(auto) result = foo(); // result is always a copy

I'm not totally sure though.

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