220 11094 article Path: news.gmane.org!not-for-mail From: David Krauss Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Core Issue: deleted templates Date: Fri, 6 Jun 2014 06:04:36 +0800 Lines: 40 Approved: news@gmane.org Message-ID: References: <9f5782b9-8ba4-4be6-a874-326df936ff24@isocpp.org> <600874ab-714d-46c8-8bce-e1fb5c18f6e0@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.2\)) Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1402005897 2268 80.91.229.3 (5 Jun 2014 22:04:57 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Jun 2014 22:04:57 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCW25A7E3QCRB7WSYOOAKGQELWHO63I@isocpp.org Fri Jun 06 00:04:48 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ie0-f200.google.com ([209.85.223.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WsfmB-00026u-NC for gclcip-std-proposals@m.gmane.org; Fri, 06 Jun 2014 00:04:48 +0200 Original-Received: by mail-ie0-f200.google.com with SMTP id y20sf7174614ier.3 for ; Thu, 05 Jun 2014 15:04:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date :message-id:references:to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type:content-transfer-encoding; bh=7sPDpQk772TtpNl3PDMaStgorw0QUbD7lomkLmFcPhU=; b=YsoRUXtzlynH7SGPEozFcMFUrh96vcdXvfzIS/7IOZYQf7kET4Q3LZ5XLeYw2J7sOL rdXA925QPqSFHggWTI33tgpSViKQtZkldjvN9xohhMODTasB7KmEGMLA6Q4PQG+8DGRi eBXBXYSIWAsrwYV8KY4c7wbpU0P1sK8s4i0jb0dOfXS3yPz4wybaBCmYwWUJKvNsX17h c5ZOSl5rxogumVB4NEZveTeMLToUrPcXk6+jVrx5M+xFtIeJg/yBe2837pd6L0eGU1ox 4At4c7PQIW1UWGY2zaVJq+iDp8TmtojgBhUH/IyF/9H0J/ENOT8O6zUBkvBJGtRnSqs8 7j1w== X-Gm-Message-State: ALoCoQly448hAqNMoKanjH96aD/agJMAJxziHfbR7P4hC2eyFruLC/ORfiOgcc6Yt090ICcUusr3 X-Received: by 10.43.65.4 with SMTP id xk4mr412774icb.12.1402005886779; Thu, 05 Jun 2014 15:04:46 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.50.138.98 with SMTP id qp2ls1332084igb.41.canary; Thu, 05 Jun 2014 15:04:46 -0700 (PDT) X-Received: by 10.68.102.34 with SMTP id fl2mr1126784pbb.2.1402005885996; Thu, 05 Jun 2014 15:04:45 -0700 (PDT) Original-Received: from mail-pb0-x232.google.com (mail-pb0-x232.google.com [2607:f8b0:400e:c01::232]) by mx.google.com with ESMTPS id zs3si15478952pbc.31.2014.06.05.15.04.45 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 05 Jun 2014 15:04:45 -0700 (PDT) Received-SPF: pass (google.com: domain of potswa@gmail.com designates 2607:f8b0:400e:c01::232 as permitted sender) client-ip=2607:f8b0:400e:c01::232; Original-Received: by mail-pb0-f50.google.com with SMTP id ma3so1690635pbc.37 for ; Thu, 05 Jun 2014 15:04:45 -0700 (PDT) X-Received: by 10.68.201.10 with SMTP id jw10mr834206pbc.25.1402005885734; Thu, 05 Jun 2014 15:04:45 -0700 (PDT) Original-Received: from [172.20.10.2] ([121.54.54.38]) by mx.google.com with ESMTPSA id bz4sm27275521pbb.12.2014.06.05.15.04.44 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 05 Jun 2014 15:04:45 -0700 (PDT) In-Reply-To: X-Mailer: Apple Mail (2.1878.2) X-Original-Sender: potswa@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of potswa@gmail.com designates 2607:f8b0:400e:c01::232 as permitted sender) smtp.mail=potswa@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=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:11094 Archived-At: On 2014-06-05, at 8:31 PM, Ville Voutilainen = wrote: > and regarding the earlier question about pointers and references, > I think we should do what we do with deleted functions, aka make uses of = such > deleted things ill-formed. That means you can't use thisandthat* or thisa= ndthat& > either. As I mentioned earlier, too many inconsistencies arise from the ability to = define pointers and references after the class is declared and before the d= efinition as deleted. The easiest thing is to let definition as deleted be = permanently incomplete, and this satisfies more uses too. To be consistent with functions, merely forming a template-id resolving to = a deleted specialization would be ill-formed, but template-ids are presentl= y more or less free. 14.5.5.1 says > When a class template is used in a context that requires an instantiation= of the class, it is necessary to determine whether the instantiation is to= be generated using the primary template or one of the partial specializati= ons. I don't have a definitive reference that it's OK to use a template-id befor= e declaring its partial/explicit specialization, but I think it is (and it = should be). --=20 ---=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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposa= ls/. .