220 15158 <6695414.K4RlN6vp9O@tjmaciei-mobl4> article Path: news.gmane.org!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Inline variables - superior of templates and constexpr. Date: Thu, 18 Dec 2014 17:53:23 -0800 Lines: 30 Approved: news@gmane.org Message-ID: <6695414.K4RlN6vp9O@tjmaciei-mobl4> References: <84da1bdc-3356-4c40-a29a-bdd4c0b058b4@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1418954014 24433 80.91.229.3 (19 Dec 2014 01:53:34 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 19 Dec 2014 01:53:34 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBFUKZ2SAKGQEIGOVOFA@isocpp.org Fri Dec 19 02:53:29 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wi0-f200.google.com ([209.85.212.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Y1mkx-0003ht-GW for gclcip-std-proposals@m.gmane.org; Fri, 19 Dec 2014 02:53:27 +0100 Original-Received: by mail-wi0-f200.google.com with SMTP id ex7sf103276wid.3 for ; Thu, 18 Dec 2014 17:53:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:date:message-id:user-agent :in-reply-to:references:mime-version:content-type:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=/qiVWEVgqDUupbq5v2hYtGpUSm0pOOFStHUCw57M0U0=; b=PVY7pNw/3cWw7YTl24QkGwIk9uCFXAZdcu/B/RzkreCiMR4T983+hRZbyivFRpz4Oz 3Rxg+WvemJ/ktRiBuvbfmgI84ApVWGBdLdUWuIuU1fioM3+rcqF9NevKDLcVcun2/LdC pQzD6ATEa7bSNAjxIQST1PORvi0lJ78Ujjt6zLcNFw4BktSWoa6sjf3epQg4lO+H0tBS S9NS7/b18TuB+h9NbOR9+PB+jU/Wr8FNWHmU9j1H5DyftXlFILWT/aPxuTm/vOLeL7rF yFkn++aAv9KFhlIIKQCLTPtn1KkB+zJViazJPjjqjLUeI7hRJSM7ABveWf8bnKF594Ox JNiQ== X-Gm-Message-State: ALoCoQl0Og78tqlcwfGaz7y0SDEYRJnFEp1QUe4pDgMgDaamEHtvWrDUQ0hbBFgB6LiWuXsjb1nL X-Received: by 10.152.5.2 with SMTP id o2mr731185lao.1.1418954006835; Thu, 18 Dec 2014 17:53:26 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.103.226 with SMTP id fz2ls34212wib.38.gmail; Thu, 18 Dec 2014 17:53:25 -0800 (PST) X-Received: by 10.180.98.138 with SMTP id ei10mr1180235wib.32.1418954005877; Thu, 18 Dec 2014 17:53:25 -0800 (PST) Original-Received: from gondolin.macieira.info (gondolin.macieira.info. [78.47.120.188]) by mx.google.com with ESMTP id p15si840451wiv.42.2014.12.18.17.53.25 for ; Thu, 18 Dec 2014 17:53:25 -0800 (PST) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) client-ip=78.47.120.188; Original-Received: from tjmaciei-mobl4.localnet (jfdmzpr04-ext.jf.intel.com [134.134.137.73]) by gondolin.macieira.info (Postfix) with ESMTPSA id 0801411B997 for ; Thu, 18 Dec 2014 17:53:25 -0800 (PST) User-Agent: KMail/4.14.3 (Linux/3.11.10-21-desktop; KDE/4.14.3; x86_64; ; ) In-Reply-To: X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) smtp.mail=thiago@macieira.org 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:15158 Archived-At: On Thursday 18 December 2014 16:18:13 sasho648 wrote: > constexpr int EvaluateSpecialArrayIndex(int a) > { return a * sizeof(int); } > > array arr; > > cout << arr[98] << endl; //compiles just fine, and produces undefined > behavior How is that different from the following? int arr[5]; cout << arr[98] << endl; Both compile just fine and produce UB. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center PGP/GPG: 0x6EF45358; fingerprint: E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 -- --- 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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. .