220 31978 <58E2A8A0.3010100@gmail.com> article Path: news.gmane.org!.POSTED!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: This variable should not be named: an identifier (not) to remember Date: Mon, 3 Apr 2017 15:55:12 -0400 Lines: 24 Approved: news@gmane.org Message-ID: <58E2A8A0.3010100@gmail.com> References: <985b9b2a-c734-45eb-95f4-db4dc0d309a1@isocpp.org> <1491170458.9U0G8TLsOk@tjmaciei-mobl1> <10c2c556-b6bb-4714-83bc-7b0ac8fd4143@isocpp.org> <1380e942-6c0c-4bae-9042-d3e5064e96d8@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 1491249323 31973 195.159.176.226 (3 Apr 2017 19:55:23 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 3 Apr 2017 19:55:23 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.1.0 To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC37LBFWUIFBBI6RRLDQKGQEWBN2ZVA@isocpp.org Mon Apr 03 21:55:18 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-it0-f70.google.com ([209.85.214.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cv84E-00078T-MO for gclcip-std-proposals@m.gmane.org; Mon, 03 Apr 2017 21:55:10 +0200 Original-Received: by mail-it0-f70.google.com with SMTP id h186sf39525642ith.10 for ; Mon, 03 Apr 2017 12:55:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=subject:to:references:newsgroups:from:message-id:date:user-agent :mime-version:in-reply-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=2vKAM6S+fjYftDo2YKOlFnGWdbufOn50hFjGvU4GqYw=; b=KZVrq8AFSu4N8eax4mp+N55sQ4MA/Bki17HjJelYcn1oye4PmObwj/yqs+founSY8H Wnq5eXuwZDq3xgAjaFJAjYi1JeU/rEXne8K/b4JJTZtgBXOlBidLMFmLQ5ngbVTz+gfp TnhHz3uuy5+6HPc5lsthsiuByg/AkiiAFuWxRjT2GP7nDtJR/RwasyVAxdWOdZ4f42vx HpU3mbWQ0kU5GsnAefhttlhx5SYa7BNPkFAHqyZdzXJ47rRm9sz/+e3TLUI2opjhDGKL 7woUaJ5GoaW06mje2gOM+y661NkDmURWccmTzwEJ/4zq5GiPclX45/K8nndvIa/dv2qU 1mtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:newsgroups:from:message-id :date:user-agent:mime-version:in-reply-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=2vKAM6S+fjYftDo2YKOlFnGWdbufOn50hFjGvU4GqYw=; b=SM/CSYu4ZNQHkpP6Pg+c7BOQS5Iiz3HPdGJ9uiMotGTczFJ1TtLBDGopYxMrP4JxzB qipyauAw4VZ5Lx6uvRnexCjG4L78D0Gfcb2AjrT0kC2DafzrlItIR8dZQN6AFQS9KVXo TWYLAxAWUba/KCbL8g4JKfbRg2U/Tn8eWFsp4DkPsfsCdE2/o1rL4VXhM2mxHLtnm1H/ 5K5uTISRLCQZT78PR3QP1ApyKa7AePFMKmzmsZt3x8vNRNP9Ytmkg61HcxHdq4reuyzr SiCIHjP79G6qCaNAGB3AU/Eoc37gPiUsh9XFd4RfxYIIqKIRYN0g4BJptxI4tbo/d+RB S+KA== X-Gm-Message-State: AFeK/H10Uz8WwV+jAhEbiAcjJBjMP3SZPTyH8YYa90pFxb1HBBPJZFYO2ybukau88swSOA== X-Received: by 10.36.125.144 with SMTP id b138mr3514505itc.10.1491249316500; Mon, 03 Apr 2017 12:55:16 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.39.226 with SMTP id c89ls2116445otb.2.gmail; Mon, 03 Apr 2017 12:55:15 -0700 (PDT) X-Received: by 10.157.32.22 with SMTP id n22mr4060176ota.269.1491249315740; Mon, 03 Apr 2017 12:55:15 -0700 (PDT) Original-Received: from mail-oi0-x22f.google.com (mail-oi0-x22f.google.com. [2607:f8b0:4003:c06::22f]) by mx.google.com with ESMTPS id s84si7016685oig.199.2017.04.03.12.55.15 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 03 Apr 2017 12:55:15 -0700 (PDT) Received-SPF: pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:4003:c06::22f as permitted sender) client-ip=2607:f8b0:4003:c06::22f; Original-Received: by mail-oi0-x22f.google.com with SMTP id d2so6314653oig.1 for ; Mon, 03 Apr 2017 12:55:15 -0700 (PDT) X-Received: by 10.157.5.161 with SMTP id 30mr9603357otd.229.1491249315273; Mon, 03 Apr 2017 12:55:15 -0700 (PDT) Original-Received: from [192.168.1.176] (tripoint.kitware.com. [66.194.253.20]) by smtp.googlemail.com with ESMTPSA id c42sm7221306ote.57.2017.04.03.12.55.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 03 Apr 2017 12:55:14 -0700 (PDT) Original-Newsgroups: gmane.comp.lang.c++.isocpp.proposals In-Reply-To: <1380e942-6c0c-4bae-9042-d3e5064e96d8@isocpp.org> X-Original-Sender: mwoehlke.floss@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:4003:c06::22f as permitted sender) smtp.mailfrom=mwoehlke.floss@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:31978 Archived-At: On 2017-04-03 15:37, Barry Revzin wrote: > I think the logical extreme of this idea is to not pick any identifier at > all - simply allow hiding declarations in the same scope. So from the > original paper's examples, using __ to declare multiple variables in the > same scope just works not because of some special magic bestowed upon the > identifier "__", but instead because you're actually declaring multiple > variables in the same scope named "__". You'd have no way of accessing the > earlier versions of __, but then you don't want to anyway. I don't know how > to get the compiler to not warn against not using the last incarnation of > __ though. That just may be a "teach the compiler that this is a convention > that people want to use" kind of thing. That seems like a recipe for bugs. We have enough problems with -Wshadow as it is, let alone making the situation *worse*... -- Matthew -- 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. 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