220 32063 <58EB8E58.9070105@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, 10 Apr 2017 09:53:28 -0400 Lines: 29 Approved: news@gmane.org Message-ID: <58EB8E58.9070105@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> <58E2A8A0.3010100@gmail.com> <665b5031-843b-4c30-8bb1-ced918c10656@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 1491832416 24355 195.159.176.226 (10 Apr 2017 13:53:36 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 10 Apr 2017 13:53:36 +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+bncBC37LBFWUIFBBYE4V3DQKGQE2UQ7LSQ@isocpp.org Mon Apr 10 15:53:31 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pf0-f198.google.com ([209.85.192.198]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cxZl5-0006Co-68 for gclcip-std-proposals@m.gmane.org; Mon, 10 Apr 2017 15:53:31 +0200 Original-Received: by mail-pf0-f198.google.com with SMTP id m89sf10444232pfi.14 for ; Mon, 10 Apr 2017 06:53:37 -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=3NFSNc3UjeV2yQDWyAo6UXAZFPjKFN2qykb2RoYiuCg=; b=I9Se/k1xJdFuQKikVpR/GwvkDH0lsJ8yxKoN9fWdFvGueQfnw1VQhnNA6UD/dRNYTg HnLpSThLKFcSvM6FJDroQQoK7Q0SzDzGKwgRHtbWoFMGmk0Gn7fhdw2MHj0MtlDV3Nq9 K422e2nMy6w5M+bbRZp9X7defvpoTrC5iQ2fywjpQ7zAIvP/QLKyEMM/PHNNkCpjDDCe WLtlJeo0FiN4BUjudsqX9s8LKquczBZeYSjtZyHqck1FXJ5x3LqyNddM2Be8SrbHFUCE lLQqFe7KcLdu4SFWOQJW6cnMPK3qBYMwkrFgEJQDBdywjx0Bo5Z87GhiiEtNl1V1Ba6b 0L/A== 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=3NFSNc3UjeV2yQDWyAo6UXAZFPjKFN2qykb2RoYiuCg=; b=krNAFPRv6bpd+Ei51EEwdHah4dE6vLQ7zVy9AaV2segwoklHG9AwHORywSCIve+mZ+ wH9jclZMpeWPtXP4AB2Cj+V7j2bBTfkT5UHXR8awTOPCSXpDYiS+t5gDNC8vC9P8Z4tv rlnvWPplPkOyvJ9zPrYzOdjCvmoDcwybU4LCbS+lkZwaou10nfDloVg1yR7t6EuJxIS0 l5T6cLYnOJACVu95Uia7XNViKNDzQDgQVSn27pXFAIB5G879tdk3yHI85IVK3hM4ERw9 BdK4J8G8AcDtl23jmnroWSTMbUyLSjtBzwI0+iaSE8XESn9fQrg0xbgJknGwR6GrWm/1 uuCA== X-Gm-Message-State: AFeK/H3kY+a+hDVv53LjoMT/PGdE0yUQ03BOoLZHD5tb/U8mJ69R0vUEn1wlYez/CSvBvA== X-Received: by 10.99.138.194 with SMTP id y185mr20858619pgd.69.1491832416911; Mon, 10 Apr 2017 06:53:36 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.60.44 with SMTP id q41ls13670324otc.20.gmail; Mon, 10 Apr 2017 06:53:36 -0700 (PDT) X-Received: by 10.237.36.5 with SMTP id r5mr8315147qtc.253.1491832416071; Mon, 10 Apr 2017 06:53:36 -0700 (PDT) Original-Received: from mail-qk0-x244.google.com (mail-qk0-x244.google.com. [2607:f8b0:400d:c09::244]) by mx.google.com with ESMTPS id p39si2792791qtb.195.2017.04.10.06.53.36 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Apr 2017 06:53:36 -0700 (PDT) Received-SPF: pass (google.com: domain of mwoehlke.floss@gmail.com designates 2607:f8b0:400d:c09::244 as permitted sender) client-ip=2607:f8b0:400d:c09::244; Original-Received: by mail-qk0-x244.google.com with SMTP id k139so19576347qke.2 for ; Mon, 10 Apr 2017 06:53:36 -0700 (PDT) X-Received: by 10.13.213.20 with SMTP id x20mr4470826ywd.6.1491832415473; Mon, 10 Apr 2017 06:53:35 -0700 (PDT) Original-Received: from [192.168.1.176] (tripoint.kitware.com. [66.194.253.20]) by smtp.googlemail.com with ESMTPSA id b135sm1520039ywh.57.2017.04.10.06.53.33 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Apr 2017 06:53:34 -0700 (PDT) Original-Newsgroups: gmane.comp.lang.c++.isocpp.proposals In-Reply-To: <665b5031-843b-4c30-8bb1-ced918c10656@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:f8b0:400d:c09::244 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:32063 Archived-At: On 2017-04-03 16:28, T. C. wrote: > if you declare multiple variables with the same name in the same > scope, you can't access *any* of them. Name lookup will simply find > all the declarations and declare an ambiguity at that point. How's that going to work? auto x = ...; ... lots of code ... foo(..., x, ...); ... lots more code ... auto x = ...; The compiler isn't going to parse the entire scope for variable declarations first in order to "retroactively" forbid the earlier use of `x`. Is the intent that `x` can be used until the second declaration? That's just... bizarre. -- 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. To post to this group, send email to std-proposals@isocpp.org. 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