220 25935 <28706525.jxcsXmKXrz@tjmaciei-mobl1> article Path: news.gmane.org!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: pure specifiers on function definitions Date: Wed, 18 May 2016 23:31:07 -0700 Lines: 22 Approved: news@gmane.org Message-ID: <28706525.jxcsXmKXrz@tjmaciei-mobl1> 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 1463639489 13413 80.91.229.3 (19 May 2016 06:31:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 19 May 2016 06:31:29 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBLV36W4QKGQEHIPY7KI@isocpp.org Thu May 19 08:31:12 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lf0-f72.google.com ([209.85.215.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1b3HUG-0004v0-0i for gclcip-std-proposals@m.gmane.org; Thu, 19 May 2016 08:31:12 +0200 Original-Received: by mail-lf0-f72.google.com with SMTP id y84sf36598541lfc.3 for ; Wed, 18 May 2016 23:31:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id:user-agent:in-reply-to:references :mime-version:x-original-sender:x-original-authentication-results :reply-to:precedence:mailing-list:list-id:x-spam-checked-in-group :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=W8jJLiwHQ9npuhofxt2UHqPOVVq0ESW1vgimVkfKrSs=; b=RxG/SbRndecRzdDl/0r/RKcwrASE01UDK8cNC35m9T9g7QU+WrMktqPioi3+qkkXnj BUU7KDmhb8bJO4+9h3GcmYpYDijvRlRQm2p78iQqVZ9ncwK7wKYWjr0+ougx4fEKgDlz jZXKuu0Bw99vW1kba7V4rs2BEXwX6qwbuPCKX1JSrI9tcl7hVdYyQ7Qd6ro7ltw4pYgS Erbssp4dTlg2tamNzqROFf1tZWx/Gq+isKEDszIYJ9fy0XPcC5vurfQoeYZErfOM7QdU odiiK4VQoV+mdL3WmKKUh4Z94l1+rbpDUnViQr2FF33YCY99bgKl2CyAGTIQpQH8Qp9j aVCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:date:message-id:user-agent :in-reply-to:references:mime-version:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=W8jJLiwHQ9npuhofxt2UHqPOVVq0ESW1vgimVkfKrSs=; b=guZBKp/o7jTGLudlVHsgN3YmuHiqZfjELbzbGztWs28DUpCemxIYJPLqVvkWmNFp4f ySkl6eonNAZC6ROEzSSLnHHK7MuBni5IIIY/dGsDS+wqmNkh2O1x3HMzF/l6aICP4fhO iTeEc+YjcZQnRBsMz3Z0l2CUZqXS30P/h+Tl8g0VLydUa3B0gpFzZchfbMg6d0wI5l2r ag8lS+Cxn2ZDf9Pmgjs3431chKWKrbwha+4pbjVkuek1YelE8dSa5rqrD4H4YZzsgrN+ ocaSNv2zXpOBJFvmDa2BzzrQUomw+TwUqmHzwQQWmcKRH0uvKySaKt3Oe6a+ml2ZYG0q s3hw== X-Gm-Message-State: AOPr4FU3nFoazuu62wtX5BU+liE45Pg3ptvHYIDCW9aH9HA+jcDMINSNx8UMG3L6S++eqA== X-Received: by 10.194.171.170 with SMTP id av10mr4969650wjc.0.1463639471436; Wed, 18 May 2016 23:31:11 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.26.195 with SMTP id a186ls453912wma.37.gmail; Wed, 18 May 2016 23:31:10 -0700 (PDT) X-Received: by 10.194.223.41 with SMTP id qr9mr11247925wjc.61.1463639470237; Wed, 18 May 2016 23:31:10 -0700 (PDT) Original-Received: from gondolin.macieira.info (gondolin.macieira.info. [78.47.120.188]) by mx.google.com with ESMTP id f142si38565659wmf.54.2016.05.18.23.31.10 for ; Wed, 18 May 2016 23:31:10 -0700 (PDT) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) client-ip=78.47.120.188; Original-Received: from tjmaciei-mobl1.localnet (unknown [IPv6:2601:1c0:5803:81c9:6cce:8273:cc9f:494c]) by gondolin.macieira.info (Postfix) with ESMTPSA id A679711B843 for ; Wed, 18 May 2016 23:31:09 -0700 (PDT) User-Agent: KMail/5.1.3 (Linux/4.6.0-1.gd9e67cc-default; KDE/5.22.0; x86_64; ; ) In-Reply-To: X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) smtp.mailfrom=thiago@macieira.org Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org 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:25935 Archived-At: On quarta-feira, 18 de maio de 2016 17:23:21 PDT Richard Smith wrote: > Yes, a low-quality conforming C++2{ compiler could choose to issue a > diagnostic when it sees the attribute and then (outside of SFINAE contexts) > compile the rest of the program ignoring its presence. But fail to link. Since this is a virtual function, it must be listed in the vtable. If the compiler ignored the [[abstract]] attribute, it won't know to insert the marker for pure virtual functions. Instead, it will try to find the actual function's entry point, which may not exist. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/28706525.jxcsXmKXrz%40tjmaciei-mobl1. .