220 28529 article Path: news.gmane.org!.POSTED!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: A plea to reconsider adding Structured Bindings to language Date: Wed, 5 Oct 2016 17:07:27 +0300 Lines: 31 Approved: news@gmane.org Message-ID: References: <201610051238.17863.marc.mutz@kdab.com> <201610051300.02280.marc.mutz@kdab.com> <201610051411.30312.marc.mutz@kdab.com> <073a7698-1388-4858-b6fa-b2b62a4fb6f1@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: blaine.gmane.org 1475676462 10686 195.159.176.226 (5 Oct 2016 14:07:42 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 5 Oct 2016 14:07:42 +0000 (UTC) To: "ISO C++ Standard - Future Proposals" Original-X-From: std-proposals+bncBC5JHI7A7ALRBIES2S7QKGQETK5ZOHA@isocpp.org Wed Oct 05 16:07:36 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vk0-f71.google.com ([209.85.213.71]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1brmr1-0000qj-6V for gclcip-std-proposals@m.gmane.org; Wed, 05 Oct 2016 16:07:27 +0200 Original-Received: by mail-vk0-f71.google.com with SMTP id 83sf129233691vkd.3 for ; Wed, 05 Oct 2016 07:07:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=ZCx1ENbT7h6bNAxCu3XMI/ev0ypNptPR6F7e0ibNZsA=; b=QbUQ1ufvriiRGjH3KJ+TOI4k+l5sZ213GfJp0CIBUiaPerqs37VbmRscy4qO/5swRQ zqUm6fyHxU0Z0pZC+6xPIb3WAu14C46l2SRg1/hYAHK+uTDv0hpZsRt9vjAlco1wYJw3 oNZVjvB1EP9RHKZLzdcrKQgsamHaYDWu0nCjYRcI6goVZsSwQN/f81ShMr1Z1aHImJ1Z j+ypen3SBZoyPX5bTTZGeMV3MkJtt2ezHgRKlaI/IM79jPHHvaUvVpjFTkxr2O4B5oIA wRpTGkTEkz81oH9KAEe7pRdpoEIEthEYupUOdtfeDIW8PmOVemprOd3T7r/XKVBshz8a LcOA== 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:from:date :message-id:subject:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=ZCx1ENbT7h6bNAxCu3XMI/ev0ypNptPR6F7e0ibNZsA=; b=lW49qJGhzBGt29uUPtg7FzVrIdEhbvS0xiJ+5zQBCqdDEooc1HrQ9bV4igCMRNpE0k Ql0gB2IPAFr7mtBDjQMkVm9U0xfqz/Ig39kheihBjDoKRNu0Xr6w0PD8+CWP+t0bazmI Rf10GDZ6N17IAztD2UEs+mUfVQ/Ijb6e9iH1EPxW2Y3SKp7k1YTqQKung2wtA9PuiUfo v+mQ3sqMiLr4gL4Osw2js/4hVR7e3LdxtzGs7XP0OCEkjiM9iidJ1HYQanVeuEiPc7/y B8Zk/BIfxKwsgmyWwbEWSE8Ekp+D6F1ZseTaaRDcEvv5AyddP5+YUe4pCttAfNcZIH73 v5NA== X-Gm-Message-State: AA6/9RneFPFzt5JyRRzaCxJfzkOKRxI2zslG+QNSc5pxmCXIkCqLeI2Tw/SO2tvlSD+IbQ== X-Received: by 10.13.241.3 with SMTP id a3mr1951277ywf.161.1475676448927; Wed, 05 Oct 2016 07:07:28 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.15.105 with SMTP id 96ls783132ott.41.gmail; Wed, 05 Oct 2016 07:07:28 -0700 (PDT) X-Received: by 10.129.99.2 with SMTP id x2mr6877319ywb.106.1475676448065; Wed, 05 Oct 2016 07:07:28 -0700 (PDT) Original-Received: from mail-vk0-x241.google.com (mail-vk0-x241.google.com. [2607:f8b0:400c:c05::241]) by mx.google.com with ESMTPS id g125si5157007vke.131.2016.10.05.07.07.28 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 05 Oct 2016 07:07:28 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c05::241 as permitted sender) client-ip=2607:f8b0:400c:c05::241; Original-Received: by mail-vk0-x241.google.com with SMTP id z126so8733900vkd.0 for ; Wed, 05 Oct 2016 07:07:28 -0700 (PDT) X-Received: by 10.31.217.3 with SMTP id q3mr6574433vkg.150.1475676447645; Wed, 05 Oct 2016 07:07:27 -0700 (PDT) Original-Received: by 10.103.104.69 with HTTP; Wed, 5 Oct 2016 07:07:27 -0700 (PDT) In-Reply-To: <073a7698-1388-4858-b6fa-b2b62a4fb6f1@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c05::241 as permitted sender) smtp.mailfrom=ville.voutilainen@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:28529 Archived-At: On 5 October 2016 at 16:49, Greg Marr wrote: > On Wednesday, October 5, 2016 at 8:09:43 AM UTC-4, Marc Mutz wrote: >> >> On Wednesday 05 October 2016 13:40:20 Domen Vrankar wrote: >> > So you're saying that returning a structure with error status and result >> > or >> > multiple results of which you only need one or two (reason being for eg. >> > cheaper to return all at once - due to for e.g. web service call or >> > complex >> > processing - than request one by one on need to basis) you would still >> > prefer dragging the entire structure around giving the feeling that your >> > code has more dependencies than it actually does? >> >> One of us is not underatanding SB correctly, or I don't understand you. SB >> stores the whole struct, too, it just defines local aliases to the member >> of >> the struct (or tuple, or pair, or ...). > > > Only if you say that you want references, using "auto &" or "auto &&". If > you use "auto", you just get copies. You get a copy of the whole struct, not copies of individual bindings. -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/CAFk2RUZwZLgNW6-XjHaZO%2B-aPa7AsA8EsHO9Vbf%3Dx%2BFHe-GL-Q%40mail.gmail.com. .