220 31818 article Path: news.gmane.org!.POSTED!not-for-mail From: Brittany Friedman Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: This variable should not be named: an identifier (not) to remember Date: Tue, 28 Mar 2017 11:34:26 -0500 Lines: 101 Approved: news@gmane.org Message-ID: References: <985b9b2a-c734-45eb-95f4-db4dc0d309a1@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a113d7eb483d313054bcd0857 X-Trace: blaine.gmane.org 1490718884 21715 195.159.176.226 (28 Mar 2017 16:34:44 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 28 Mar 2017 16:34:44 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCHLPXGUXMJBBE5B5LDAKGQE6SC3LBI@isocpp.org Tue Mar 28 18:34:39 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-it0-f72.google.com ([209.85.214.72]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1csu4d-0003eP-6u for gclcip-std-proposals@m.gmane.org; Tue, 28 Mar 2017 18:34:23 +0200 Original-Received: by mail-it0-f72.google.com with SMTP id h186sf18749955ith.10 for ; Tue, 28 Mar 2017 09:34:29 -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=F9NiTeqboEOnzB3pL8/THU5aPcBUTiAQtKUkEvlpC0Y=; b=tTQamV22XesmtoAj32YpbvAxTW0ZCSsmXa7+1+KKJ+eICwKcOpbjmRVVQyJX+ZLbyE WXyhT9c0MhQvTY18P7Q/y2Q8PDY2dvPE4L/Bu3H/b1MtjpwT7CCS3mGt+eK6zlCmzr4c hCEpLnpbW+JzxmNB7zoJLWmS1N30MFXiVHH2pOFv5eAI2yHlPffiUF8vwsqM7nek7Dho WvnIWWNlMdzLcIeGPUgBEbnU4YPoaAq0c2edz4DIXz5LeaRVqnSxgTuEKJir1uWVkW/l U/qXxSJaUx9fLiGAM6s90eLD+UCIZr9GmwwiOSRQfqvieMB8NtdJl8GfyG+8vJi56yJb hVWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; 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=F9NiTeqboEOnzB3pL8/THU5aPcBUTiAQtKUkEvlpC0Y=; b=fTCe6MOseFPwwPER4B2gkORRo+7jqwpfPKyKyvDB/46TG0zQFt9A2Tth9o//5XI0MN FIdWwiSI1a2J4wXtYglqRT6IZVJTFm+GzfEfP2tGyjq34bkjTMDUq/yEwT5tkSM1FluI kh17NUaDPGa7EE8wLjDPJwRnOqurKZYCBAVJ0hFgQZcdIBykAShEiAccjckr+LLH+w2V +yECPAV/B9Ma3Pc3Fkdh/jReQHtW0MhRSniiYJxLBeQEbvtqagp/ZbmHz04rQDi9yR2B 9WtVJz3r8GBr+0/aGb3N5t/BcdFQbLP+QKoNdC7hGcvx5nAVqH9jQlJgxZPxSQ+cxSk5 0pwg== X-Gm-Message-State: AFeK/H3TZvmR33ZUZQ0i5w86eYVE11PjX3rMV7ugAkeXMa9rEhvnNHnHHlbZ3GiysL+Lbg== X-Received: by 10.107.128.71 with SMTP id b68mr9380181iod.76.1490718868970; Tue, 28 Mar 2017 09:34:28 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.47.2 with SMTP id j2ls2603925itj.3.gmail; Tue, 28 Mar 2017 09:34:27 -0700 (PDT) X-Received: by 10.55.98.204 with SMTP id w195mr27056826qkb.197.1490718867368; Tue, 28 Mar 2017 09:34:27 -0700 (PDT) Original-Received: from mail-qt0-x234.google.com (mail-qt0-x234.google.com. [2607:f8b0:400d:c0d::234]) by mx.google.com with ESMTPS id c67si3840327qkf.291.2017.03.28.09.34.27 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 28 Mar 2017 09:34:27 -0700 (PDT) Received-SPF: pass (google.com: domain of fourthgeek@gmail.com designates 2607:f8b0:400d:c0d::234 as permitted sender) client-ip=2607:f8b0:400d:c0d::234; Original-Received: by mail-qt0-x234.google.com with SMTP id n21so68857072qta.1 for ; Tue, 28 Mar 2017 09:34:27 -0700 (PDT) X-Received: by 10.237.36.151 with SMTP id t23mr24262594qtc.8.1490718866786; Tue, 28 Mar 2017 09:34:26 -0700 (PDT) Original-Received: by 10.140.101.165 with HTTP; Tue, 28 Mar 2017 09:34:26 -0700 (PDT) In-Reply-To: <985b9b2a-c734-45eb-95f4-db4dc0d309a1@isocpp.org> X-Original-Sender: fourthgeek@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of fourthgeek@gmail.com designates 2607:f8b0:400d:c0d::234 as permitted sender) smtp.mailfrom=fourthgeek@gmail.com; dmarc=pass (p=NONE sp=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:31818 Archived-At: --001a113d7eb483d313054bcd0857 Content-Type: text/plain; charset=UTF-8 On Mon, Mar 27, 2017 at 3:27 PM, Alberto Barbati wrote: > Hello, > > this is a draft for a proposal to add a special meaning to the identifier > __ (double underscore) so that it can be used (even repeatedly in the same > lexical scope) for all variables whose name is not important and that is no > longer needed after declaration. The draft includes a few examples. > > Is there any interest in this? > > Thanks in advance, > > Alberto > > -- > 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/985b9b2a-c734-45eb- > 95f4-db4dc0d309a1%40isocpp.org > > . > Instead of __, I'd propose using ?. For example auto ? = scope_guard{...}. ? isn't allowed in identifiers so it shouldn't conflict with existing nonconformant code. ? is also shorter :) -- 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/CADbh%2BeSOtnM76_2-0kKo7U%2BDCK4Mt1uYaR1HfAzxcxXuvcv%2Bwg%40mail.gmail.com. --001a113d7eb483d313054bcd0857 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

= On Mon, Mar 27, 2017 at 3:27 PM, Alberto Barbati <albertobarbati@gm= ail.com> wrote:
Hello,

this is a draft for a proposal to ad= d a special meaning to the identifier __ (double underscore) so that it can= be used (even repeatedly in the same lexical scope) for all variables whos= e name is not important and that is no longer needed after declaration. The= draft includes a few examples.

Is there any interest in this?
Thanks in advance,

Alberto

--
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To view this discussion on the web visit = https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/985b= 9b2a-c734-45eb-95f4-db4dc0d309a1%40isocpp.org.



Instead of _= _, I'd propose using ?. For example auto ? =3D scope_guard{...}. ? isn&= #39;t allowed in identifiers so it shouldn't conflict with existing non= conformant code. ? is also shorter :)

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