220 5141 article Path: news.gmane.org!not-for-mail From: Zhihao Yuan Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: constexpr data member Date: Wed, 19 Jun 2013 19:00:51 -0400 Lines: 34 Approved: news@gmane.org Message-ID: References: <300a19dd-8a82-4788-9802-45170480b30a@isocpp.org> <63d90b03-5605-476d-b40b-7ebcee0d3354@isocpp.org> <0df105c5-7019-4674-83ac-1b071964210b@isocpp.org> <9a4c139d-b08f-4dab-b5a3-9ff9d3139061@isocpp.org> <1ef2b6fd-21f7-4492-a778-03952dd1720d@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: ger.gmane.org 1371682851 28552 80.91.229.3 (19 Jun 2013 23:00:51 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 19 Jun 2013 23:00:51 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCUILMGRQMARBI7QRCHAKGQERBIZ24Q@isocpp.org Thu Jun 20 01:00:53 2013 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 1UpRMz-0006tv-NO for gclcip-std-proposals@m.gmane.org; Thu, 20 Jun 2013 01:00:53 +0200 Original-Received: by mail-wi0-f200.google.com with SMTP id k10sf1183694wiv.7 for ; Wed, 19 Jun 2013 16:00:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-beenthere:mime-version:in-reply-to:references:date:message-id :subject:from:to:x-original-sender:x-original-authentication-results :reply-to:precedence:mailing-list:list-id:x-google-group-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe :content-type; bh=lehLYX6t9uRUeV52dvb3xH9ie4a4bFNgkMeVCNcvyCw=; b=gxRe4dcrvwyxei30mXJ8G3c2dwvNW3EAP5RndRb1kPfak7fnfxwoXs0Ku9KmbikFcT baLqVzEw647RpMQyaOSP8asj0o8P5TGINEpD8NA3mGLYT8OLcwOnAs/bM+oiE6tE/2zL KZdt1P9VFFhZuaSIU6g9Y+rg+OLFfqK/EVpSCFG/n60UvG9IvuJ3+J8TngRwRe5FXkcY UILa3xGYMqC3mrqpjDSwqtoFSKUblMBOf/MIOSNTQEMvSXvQ4SJLxK02zQAmbnIqAyG0 BaUcWqI/ujRrrSUO5+Ahhlrgyx19wm5EeTE/ArV7S6VIZOOLUxzjMLb0HXNAzJME2F2L mm5g== X-Received: by 10.112.55.67 with SMTP id q3mr2160753lbp.17.1371682852908; Wed, 19 Jun 2013 16:00:52 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.26.136 with SMTP id l8ls33413lag.66.gmail; Wed, 19 Jun 2013 16:00:51 -0700 (PDT) X-Received: by 10.152.4.163 with SMTP id l3mr2353768lal.60.1371682851462; Wed, 19 Jun 2013 16:00:51 -0700 (PDT) Original-Received: from mail-la0-x229.google.com (mail-la0-x229.google.com [2a00:1450:4010:c03::229]) by mx.google.com with ESMTPS id bo6si10882880lbb.12.2013.06.19.16.00.51 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 19 Jun 2013 16:00:51 -0700 (PDT) Received-SPF: pass (google.com: domain of lichray@gmail.com designates 2a00:1450:4010:c03::229 as permitted sender) client-ip=2a00:1450:4010:c03::229; Original-Received: by mail-la0-f41.google.com with SMTP id fn20so5109404lab.0 for ; Wed, 19 Jun 2013 16:00:51 -0700 (PDT) X-Received: by 10.112.12.137 with SMTP id y9mr4233094lbb.91.1371682851266; Wed, 19 Jun 2013 16:00:51 -0700 (PDT) Original-Received: by 10.112.79.161 with HTTP; Wed, 19 Jun 2013 16:00:51 -0700 (PDT) In-Reply-To: X-Original-Sender: lichray@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of lichray@gmail.com designates 2a00:1450:4010:c03::229 as permitted sender) smtp.mail=lichray@gmail.com; dkim=pass header.i=@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:5141 Archived-At: On Wed, Jun 19, 2013 at 6:31 PM, Zhihao Yuan wrote: > Richard gives me a new thought: If we can use the per-object syntax > `object.name` to access it, then it's no longer a static data member > (but I want they are actually per-class). Or, there is another option: constexpr data members are only accessible within the class scope (including the member function definition outside the syntactical area of the class definition). Thus, they are per-class, implemented as static data member, but NOT accessible with the syntax Class::name This should be what I initially want (namely, some constant definition within the class scope). I have to use private + static + constexpr to achieve that. But it LGTM if the Class::name syntax is completely disabled. -- Zhihao Yuan, ID lichray The best way to predict the future is to invent it. ___________________________________________________ 4BSD -- http://4bsd.biz/ -- --- 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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