220 31929 <170CB823-B63F-4910-A227-95C23314ADAD@gmail.com> article Path: news.gmane.org!.POSTED!not-for-mail From: Alberto Barbati Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: This variable should not be named: an identifier (not) to remember Date: Sun, 2 Apr 2017 21:56:01 +0200 Lines: 34 Approved: news@gmane.org Message-ID: <170CB823-B63F-4910-A227-95C23314ADAD@gmail.com> References: <985b9b2a-c734-45eb-95f4-db4dc0d309a1@isocpp.org> <1491170458.9U0G8TLsOk@tjmaciei-mobl1> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 (1.0) Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1491162970 26429 195.159.176.226 (2 Apr 2017 19:56:10 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 2 Apr 2017 19:56:10 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCPY5DV6RIMBBVVOQXDQKGQEOWHGLMQ@isocpp.org Sun Apr 02 21:56:06 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lf0-f70.google.com ([209.85.215.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1culbW-00066c-5C for gclcip-std-proposals@m.gmane.org; Sun, 02 Apr 2017 21:56:02 +0200 Original-Received: by mail-lf0-f70.google.com with SMTP id n78sf24368585lfi.4 for ; Sun, 02 Apr 2017 12:56:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=content-transfer-encoding:from:mime-version:date:message-id:subject :in-reply-to:references: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=dHZ2JhzNcUQEgJcd7Fxu53KeQOyHo1NUIAEexeHVINo=; b=qVn4rPr4i0yALRHXMDVZiIYYewq6ZaqBidr4UmAHhKoGqLDMw0rBUM49KpXnOA8kKx XvLSMkNXJH+R4arqkxewDToI2Bp7qOARf7QjECCGFK6bb/GFlb4jw34tImsJFIhtxdkn V+lPbp6Z759T/FvQa9RYIpSrWzHq/cT1gyXGx3x+V+rWSY43gUw4phMNeYQqgm4qpGGL K1GpttWj1zaVjC3gfiu5q60aGbGjaV98ZZZSzx0ywMRDz4C1S+Z6PWIeX2abLa3qDiHM UYYe+p+A8g36mPx3CzHSSS4eqA3NrRfX4cdC/c/gyoXihjvbXFCc5ZHRlrV3Y95wX+Mz 9CZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:content-transfer-encoding:from:mime-version:date :message-id:subject:in-reply-to:references: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=dHZ2JhzNcUQEgJcd7Fxu53KeQOyHo1NUIAEexeHVINo=; b=gH47mf3BHQ1rgkfS/u7FtRJPeDcLZsVWDBGcZ22tetLhzIC8mDBUYnx8JcYDGjqbxq cMpctVtEnvXXkxWdR9+AQlViS9ZyzY9Hhjv5fXrc/VZVbJdtOHNzDgzykbAxMdxPCIFU 8y+yrspXuUpD/02ZR/EdnMCBdDOPw/EXCmMX0lzHZJw6O+TP5pEzah8QpecS+Xjd8OXx cx+Ofc81D/yIq1NFdiMjm45KVyfig2g03f2wKt0qsJUGrmrmKtEThq1Eccv5U+J8XPVC k2zrNjuGl+cft1e6gT2YPBnBBRP4NZGxHAvI5zN4yRBoXfbi4PcgPcG0dAhTdM23HZrK vHI X-Gm-Message-State: AFeK/H13dHXZ0cLPI4tlt1OXPch+R8DRRZcl9qYnwzQxquxJSM+PAgnu2lTl0Od0YKOjPA== X-Received: by 10.25.80.88 with SMTP id z24mr1767775lfj.29.1491162968321; Sun, 02 Apr 2017 12:56:08 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.136.5 with SMTP id k5ls540719wmd.17.gmail; Sun, 02 Apr 2017 12:56:06 -0700 (PDT) X-Received: by 10.223.152.43 with SMTP id v40mr11617080wrb.60.1491162966739; Sun, 02 Apr 2017 12:56:06 -0700 (PDT) Original-Received: from mail-wr0-x22b.google.com (mail-wr0-x22b.google.com. [2a00:1450:400c:c0c::22b]) by mx.google.com with ESMTPS id a128si12290120wmc.82.2017.04.02.12.56.06 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 02 Apr 2017 12:56:06 -0700 (PDT) Received-SPF: pass (google.com: domain of albertobarbati@gmail.com designates 2a00:1450:400c:c0c::22b as permitted sender) client-ip=2a00:1450:400c:c0c::22b; Original-Received: by mail-wr0-x22b.google.com with SMTP id w11so141421097wrc.3 for ; Sun, 02 Apr 2017 12:56:06 -0700 (PDT) X-Received: by 10.28.146.207 with SMTP id u198mr6471736wmd.103.1491162966061; Sun, 02 Apr 2017 12:56:06 -0700 (PDT) Original-Received: from [1.141.192.41] ([91.253.144.23]) by smtp.gmail.com with ESMTPSA id n5sm11408858wmf.14.2017.04.02.12.56.05 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 02 Apr 2017 12:56:05 -0700 (PDT) In-Reply-To: <1491170458.9U0G8TLsOk@tjmaciei-mobl1> X-Mailer: iPhone Mail (14D27) X-Original-Sender: AlbertoBarbati@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of albertobarbati@gmail.com designates 2a00:1450:400c:c0c::22b as permitted sender) smtp.mailfrom=albertobarbati@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:31929 Archived-At: Il giorno 02 apr 2017, alle ore 20:03, Thiago Macieira ha scritto: >> On s=C3=A1bado, 1 de abril de 2017 21:19:37 PDT Richard Smith wrote: >> Have you considered that possibility? It would give a better name (_ rat= her >> than __) and avoid "breaking" existing code that uses __. >=20 > _ is not reserved to the compiler and is VERY often #defined to gettext. Thank you Richard for your suggestion which is very interesting, since it p= rovides good insights about a possible wording. As for the name, I believe = Thiago and Magnus raised valid concerns, though. It's true that the we migh= t choose _ without breaking existing code. However defining _ as a macro is= currently valid and apparently widely used. I believe we therefore have on= ly two choices: either we make such uses undefined behavior (upsetting a lo= t of people) or we choose wording to avoid that (making the feature essenti= ally unusable for users of all libraries like gettext). None of the two app= roaches seems very good. Is there a third option? __ seems somewhat safer and less controversial. Alberto --=20 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 e= mail 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/170CB823-B63F-4910-A227-95C23314ADAD%40gmail.com= .. .