220 7878 article Path: news.gmane.org!not-for-mail From: =?UTF-8?B?0JTQvNC40YLRgNC40Lkg0JvQtdC+0L3RgtGM0LXQsg==?= Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Limited inheritance for classes Date: Wed, 20 Nov 2013 18:52:49 +0400 Lines: 128 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=089e01634aa65a895904eb9cef41 X-Trace: ger.gmane.org 1384959169 7230 80.91.229.3 (20 Nov 2013 14:52:49 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 20 Nov 2013 14:52:49 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCVM3HN4RQMBBQUZWOKAKGQEELMMCYA@isocpp.org Wed Nov 20 15:52:55 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pb0-f72.google.com ([209.85.160.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Vj99A-0004o9-B5 for gclcip-std-proposals@m.gmane.org; Wed, 20 Nov 2013 15:52:52 +0100 Original-Received: by mail-pb0-f72.google.com with SMTP id jt11sf16135155pbb.7 for ; Wed, 20 Nov 2013 06:52:51 -0800 (PST) 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=MbHk74ckwUU7iSUM1jUU9a0VET3dBetjDG+xXTfmZ88=; b=SBL6tG1hezsNM8RSDcqB3B4fhTRojjgF2ohuh+SCbF4LMKYptju5dqUL65F90Bhlx+ wOXCk7H7RK+7DaRFxaLT66z90OlfzCmKJYsLxX0b/h1Nv7dfI8B0rOW3H45AWz8HXK8+ cW65cEohWrDfXTuQLV6upWlluJlmSx3y8ctPjAkEcFaVOgn1ucFRUFthbxTP29D8OPnX SHvACoi1VNYIcOh8WHPIASVt/HjqoiTXKLfuT3dBbGwvZphPvtmTrVSkdmWc8LKe/Z1k uohJ93313FLWo+UwiVlOxXkI3tnCk11IZw7zA1byJ9HeHkNpTJwCuIhn7HcBe2JSmnTI nFvw== X-Gm-Message-State: ALoCoQnSfxxjYCPUPlr+/QQTMy2CtTAO16yTpEpUq77ZFdUhiJ56smxDa4ERfFN6LiFhbbb2R8n+ X-Received: by 10.66.141.46 with SMTP id rl14mr315273pab.44.1384959170819; Wed, 20 Nov 2013 06:52:50 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.131.7 with SMTP id oi7ls97092qeb.92.gmail; Wed, 20 Nov 2013 06:52:50 -0800 (PST) X-Received: by 10.58.46.77 with SMTP id t13mr180452vem.32.1384959170086; Wed, 20 Nov 2013 06:52:50 -0800 (PST) Original-Received: from mail-ve0-x231.google.com (mail-ve0-x231.google.com [2607:f8b0:400c:c01::231]) by mx.google.com with ESMTPS id gu4si9540612vdc.98.2013.11.20.06.52.50 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 20 Nov 2013 06:52:50 -0800 (PST) Received-SPF: pass (google.com: domain of dm.leontiev7@gmail.com designates 2607:f8b0:400c:c01::231 as permitted sender) client-ip=2607:f8b0:400c:c01::231; Original-Received: by mail-ve0-f177.google.com with SMTP id db12so3204423veb.8 for ; Wed, 20 Nov 2013 06:52:50 -0800 (PST) X-Received: by 10.52.166.200 with SMTP id zi8mr611824vdb.38.1384959169953; Wed, 20 Nov 2013 06:52:49 -0800 (PST) Original-Received: by 10.58.213.161 with HTTP; Wed, 20 Nov 2013 06:52:49 -0800 (PST) In-Reply-To: X-Original-Sender: dm.leontiev7@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of dm.leontiev7@gmail.com designates 2607:f8b0:400c:c01::231 as permitted sender) smtp.mail=dm.leontiev7@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:7878 Archived-At: --089e01634aa65a895904eb9cef41 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I want B to override function. And I want A to override function. I want B to not no override function A already overrided. The problem is B overrides function() in _both_ parent classes. I want it to override only one function() in one parent. 2013/11/20 Ville Voutilainen > On 20 November 2013 16:38, =D0=94=D0=BC=D0=B8=D1=82=D1=80=D0=B8=D0=B9 =D0= =9B=D0=B5=D0=BE=D0=BD=D1=82=D1=8C=D0=B5=D0=B2 > wrote: > > because I'll get an error on line: > > > > class B : public A, private Handler { > > void function();//ERROR: function is final > > }; > > > > final does not protect VTable > > > You didn't want B to be able to override 'function', final gave you exact= ly > that, and now you don't want exactly that? If B is still able to > override 'function', > what is that supposed to mean, and how does that prevent the problem > you described? > > -- > > --- > You received this message because you are subscribed to a topic in the > Google Groups "ISO C++ Standard - Future Proposals" group. > To unsubscribe from this topic, visit > https://groups.google.com/a/isocpp.org/d/topic/std-proposals/XHPXdG01rBY/= unsubscribe > . > To unsubscribe from this group and all its topics, 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/. > --=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/. --089e01634aa65a895904eb9cef41 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I want B to override function. And I want A to overri= de function. I want B to not no override function A already overrided.
=C2=A0
The problem is B overrides function() in _both_ pare= nt classes. I want it to override only one function() in one parent.


2013/11= /20 Ville Voutilainen <ville.voutilainen@gmail.com>
On 20 November 2013 16:38, =D0=94=D0=BC=D0=B8=D1=82=D1=80= =D0=B8=D0=B9 =D0=9B=D0=B5=D0=BE=D0=BD=D1=82=D1=8C=D0=B5=D0=B2 <dm.leontiev7@gmail.com> wrote: > because I'll get an error on line:
>
> class B : public A, private Handler {
> =C2=A0 =C2=A0 void function();//ERROR: function is final
> };
>
> final does not protect VTable


You didn't want B to be able to override 'function', fina= l gave you exactly
that, and now you don't want exactly that? If B is still able to
override 'function',
what is that supposed to mean, and how does that prevent the problem
you described?

--

---
You received this message because you are subscribed to a topic in the Goog= le Groups "ISO C++ Standard - Future Proposals" group.
To unsubscribe from this topic, visit https://groups.google.com/a/isocpp.org/d/topic/std-proposals/XHPXdG01rBY= /unsubscribe.
To unsubscribe from this group and all its topics, send an email to std-proposals+unsubscrib= e@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/gro= up/std-proposals/.

--
 
---
You received this message because you are subscribed to the Google Groups &= quot;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-proposals/<= /a>.
--089e01634aa65a895904eb9cef41-- .