220 10742 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Core Issue: deleted templates Date: Thu, 22 May 2014 13:11:45 +0300 Lines: 46 Approved: news@gmane.org Message-ID: References: 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 1400753515 27129 80.91.229.3 (22 May 2014 10:11:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 22 May 2014 10:11:55 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRBYM266NQKGQE66AAQ4I@isocpp.org Thu May 22 12:11:48 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pd0-f198.google.com ([209.85.192.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WnPyW-0008JC-4C for gclcip-std-proposals@m.gmane.org; Thu, 22 May 2014 12:11:48 +0200 Original-Received: by mail-pd0-f198.google.com with SMTP id w10sf9888263pde.9 for ; Thu, 22 May 2014 03:11:46 -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:in-reply-to:references:date :message-id:subject:from: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; bh=TGp9B9EnfwdFh0MmnfIpAbCoJpsjrs94TrJwqsaycAo=; b=PcJbiALLrD9CqcfYlijSntWD2KFOcxOUCTONn4h1d28I4MAehSvMYbSegatHEN6KNn F2MNTXzgWkgDCyqouungL9jBxBdefxLaPH5j8hvE92wGeVLC+gwOgEEi5tAvzzQ2Cgwn 9UDEJbFLxX5rpaUAZRoQPBO1aQOGk9fsJ5BGueCqdMmcPFzy8rQF4xGB5sXixGqchwf3 jukhz3uxe9dd5xHEPEBlgXJR14CTX0/xt5l2TXEwcAJFDnzWqABTWZ2HblJ8vjljLF31 eE407/yqfH72ZPHVTqITcVxgvuxKlp3CteRt8I+K+dvb1rioQpcuXQ4oWUMrQUZv+4Wd 17TQ== X-Gm-Message-State: ALoCoQn40N4EOr/oSTzVqh8UECHJ62DENIg/b8ySNFHuG0kM1eoEa348CAskR0Cq3BZqhf/7ZB7U X-Received: by 10.66.222.129 with SMTP id qm1mr24467127pac.6.1400753506402; Thu, 22 May 2014 03:11:46 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.108.4 with SMTP id i4ls1101106qgf.78.gmail; Thu, 22 May 2014 03:11:45 -0700 (PDT) X-Received: by 10.224.165.148 with SMTP id i20mr75816780qay.41.1400753505551; Thu, 22 May 2014 03:11:45 -0700 (PDT) Original-Received: from mail-qg0-x230.google.com (mail-qg0-x230.google.com [2607:f8b0:400d:c04::230]) by mx.google.com with ESMTPS id y5si8803109qcd.14.2014.05.22.03.11.45 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 22 May 2014 03:11:45 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c04::230 as permitted sender) client-ip=2607:f8b0:400d:c04::230; Original-Received: by mail-qg0-f48.google.com with SMTP id i50so5233054qgf.7 for ; Thu, 22 May 2014 03:11:45 -0700 (PDT) X-Received: by 10.140.96.51 with SMTP id j48mr75162786qge.24.1400753505419; Thu, 22 May 2014 03:11:45 -0700 (PDT) Original-Received: by 10.224.181.5 with HTTP; Thu, 22 May 2014 03:11:45 -0700 (PDT) In-Reply-To: X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c04::230 as permitted sender) smtp.mail=ville.voutilainen@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:10742 Archived-At: On 22 May 2014 12:46, Douglas Boffey wrote: > Would it not be better if we could explicitly delete the general template, > thus: > > template > class Foo = delete; > > template <> > class Foo { /* ... */ }; Yes? You can do that. > Similarly, you may want to allow the general, but explicitly deletea > specialisation, so > > template > class Foo { /* ... */ }; > > template <> > class Foo = delete; You can do that, too. > Although this would make an ambiguity in the grammar with respect to member > functions, e.g.: > > class Foo { > public: > template > Foo &operator=(const T &t) = delete; // Are we deleting the template or > the member function? > // ... > }; The template is deleted, not member functions that would happen to have a signature that could be the same as a specialization of that template. -- --- 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/. .