220 10747 article Path: news.gmane.org!not-for-mail From: Jonathan Coe Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Core Issue: deleted templates Date: Thu, 22 May 2014 13:03:47 +0100 Lines: 121 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: multipart/alternative; boundary=047d7b3435a2cb393804f9fbe729 X-Trace: ger.gmane.org 1400760243 10258 80.91.229.3 (22 May 2014 12:04:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 22 May 2014 12:04:03 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC2JVFPBRAHBBJGP66NQKGQEWMKAGUY@isocpp.org Thu May 22 14:03:56 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ee0-f71.google.com ([74.125.83.71]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WnRiv-0003fX-HZ for gclcip-std-proposals@m.gmane.org; Thu, 22 May 2014 14:03:49 +0200 Original-Received: by mail-ee0-f71.google.com with SMTP id c13sf2027267eek.10 for ; Thu, 22 May 2014 05:03:49 -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:sender: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=fVeAbYUWVVwVfXdX6fX58k+EigsLbEc1wr5cIZ2H0Qk=; b=GoN5hxX+iEokgHMnqqskloXNfr4eBiZqxdx7vw+l9lGVT6BxJz0bJgR+IVZ5JJX7+U N/fDGzEPhVDlKNlj9ZZkrV+cshosHd0hrG6RRQWJIyvF8fYG/NtES65pl3KhB/6NkXv1 TJfzdjSiDRrON4N6oS+ftuVCs0mz+zmzQl9WuryD3cvxuBf4kkH48PbR1p0WwDvPYEE6 Ld0YqxvhRWPQcK264+UVMsBKgDb67rPOgCsq569kNRrddLQ2MqKqSampesEtJ4qzKwhW vHhvfvrCSJQB92EMWWCa5GzTNdoQMUX1voLbUeI9ItdoLKzT8LVG4cDf98ltjr1/GZOx W/vg== X-Gm-Message-State: ALoCoQkPrhBZg/x2cV4GgX5ag2clYYtkJrcwhpl/yr71cDfLs5BG23Mlf6XTbZ9/b4KlIxAUwlAy X-Received: by 10.15.35.134 with SMTP id g6mr2291417eev.3.1400760229285; Thu, 22 May 2014 05:03:49 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.181.12.115 with SMTP id ep19ls457040wid.11.gmail; Thu, 22 May 2014 05:03:48 -0700 (PDT) X-Received: by 10.14.148.130 with SMTP id v2mr13411172eej.37.1400760228063; Thu, 22 May 2014 05:03:48 -0700 (PDT) Original-Received: from mail-ee0-x22e.google.com (mail-ee0-x22e.google.com [2a00:1450:4013:c00::22e]) by mx.google.com with ESMTPS id cc49si28198eeb.21.2014.05.22.05.03.48 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 22 May 2014 05:03:48 -0700 (PDT) Received-SPF: pass (google.com: domain of jonathanbcoe@gmail.com designates 2a00:1450:4013:c00::22e as permitted sender) client-ip=2a00:1450:4013:c00::22e; Original-Received: by mail-ee0-f46.google.com with SMTP id t10so2572896eei.19 for ; Thu, 22 May 2014 05:03:47 -0700 (PDT) X-Received: by 10.14.202.137 with SMTP id d9mr38878260eeo.10.1400760227803; Thu, 22 May 2014 05:03:47 -0700 (PDT) Original-Sender: jonathanbcoe@gmail.com Original-Received: by 10.14.184.70 with HTTP; Thu, 22 May 2014 05:03:47 -0700 (PDT) In-Reply-To: X-Original-Sender: jonathanbcoe@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of jonathanbcoe@gmail.com designates 2a00:1450:4013:c00::22e as permitted sender) smtp.mail=jonathanbcoe@gmail.com; dkim=pass header.i=@gmail.com; dmarc=fail (p=NONE dis=NONE) header.from=me.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:10747 Archived-At: --047d7b3435a2cb393804f9fbe729 Content-Type: text/plain; charset=UTF-8 I think that =delete for template classes as you suggest would be a useful feature. Regards, Jonathan On 22 May 2014 11:12, Ville Voutilainen wrote: > On 22 May 2014 13:11, Ville Voutilainen > wrote: > > 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. > > > Argh, sorry, I didn't notice that you meant deleting classes or class > templates, not > functions, I read that way too hastily. > > -- > > --- > 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/. > -- --- 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/. --047d7b3435a2cb393804f9fbe729 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I think that =3Ddelete for template classes as you suggest= would be a useful feature.

Regards,

Jonathan


On 22 May 2014 11:12, Ville Voutilainen <ville.voutilainen@gmail= ..com> wrote:
On 22 May 2014 13:11, Ville Voutilainen <ville.voutilainen@gmail.com> wrote:<= br> > On 22 May 2014 12:46, Douglas Boffey <douglas.boffey@gmail.com> wrote:
>> Would it not be better if we could explicitly delete the general t= emplate,
>> thus:
>>
>> template <typename T>
>> class Foo =3D delete;
>>
>> template <>
>> class Foo<Bar> { /* ... */ };
>
> Yes? You can do that.


Argh, sorry, I didn't notice that you meant deleting classes or c= lass
templates, not
functions, I read that way too hastily.

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