220 9245 article Path: news.gmane.org!not-for-mail From: Nevin Liber Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: add "implicit" keyword? Date: Mon, 10 Feb 2014 10:38:27 -0600 Lines: 67 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=047d7bb04f687e226f04f20ffaf9 X-Trace: ger.gmane.org 1392050342 12561 80.91.229.3 (10 Feb 2014 16:39:02 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 10 Feb 2014 16:39:02 +0000 (UTC) To: "std-proposals@isocpp.org" Original-X-From: std-proposals+bncBCE35H5S6IDBBLEB4SLQKGQEPZ3YXEI@isocpp.org Mon Feb 10 17:39:11 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f72.google.com ([209.85.215.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WCtt0-0000Md-8v for gclcip-std-proposals@m.gmane.org; Mon, 10 Feb 2014 17:39:10 +0100 Original-Received: by mail-la0-f72.google.com with SMTP id pv20sf10275437lab.7 for ; Mon, 10 Feb 2014 08:39:10 -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:sender:in-reply-to:references:from :date:message-id:subject: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=qm3yd3M/sEomxXmsfeTIsu6wEC2F86QGuboBy0QERCo=; b=E/GSkNGBN2fh3xhDsWgARu2m2eZrVMKR0wy2NHcVEYusBNKRma37ryOPbU4pRt+h0v lVEPXTqHQlRiuJW1JDOqPRIry84hz9IuvuvUjW5RCQzTu7U2WPsnAfiQ/83bVh+6rMra +YwpT4chLyG6yEJEM7iBgbJtsmx0L23xfsUUe6ThYsUGccMOnB7G88dE18rtzleAoaM1 PjRopjs5HuUEnGF8dKl75PmAp1nuki2Iw1kNAqf8iNQ/uO9WXtyDpKRu7mJTYvq0oSQO IMlEgJDfjPQgRbMvEv7dxw3Dk6PYbuCZfltcv/re2u4ty6H+yOSxW8EVwk3guWu1QvgD WxUA== X-Gm-Message-State: ALoCoQmW++/Mo59s9YJkpqWoCpxBx9R0bdkqNVGkwJm+UrDmiBbwpfilsqer35pF4rLxxXgiMmbu X-Received: by 10.112.161.74 with SMTP id xq10mr13685653lbb.10.1392050349882; Mon, 10 Feb 2014 08:39:09 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.181.11.136 with SMTP id ei8ls539425wid.25.canary; Mon, 10 Feb 2014 08:39:08 -0800 (PST) X-Received: by 10.180.38.7 with SMTP id c7mr11452762wik.0.1392050348279; Mon, 10 Feb 2014 08:39:08 -0800 (PST) Original-Received: from mail-we0-x232.google.com (mail-we0-x232.google.com [2a00:1450:400c:c03::232]) by mx.google.com with ESMTPS id vg1si7895493wjc.43.2014.02.10.08.39.08 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 10 Feb 2014 08:39:08 -0800 (PST) Received-SPF: pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c03::232 as permitted sender) client-ip=2a00:1450:400c:c03::232; Original-Received: by mail-we0-f178.google.com with SMTP id q59so4481866wes.9 for ; Mon, 10 Feb 2014 08:39:07 -0800 (PST) X-Received: by 10.195.13.164 with SMTP id ez4mr22646021wjd.11.1392050347842; Mon, 10 Feb 2014 08:39:07 -0800 (PST) Original-Sender: nliber@gmail.com Original-Received: by 10.194.121.163 with HTTP; Mon, 10 Feb 2014 08:38:27 -0800 (PST) In-Reply-To: X-Original-Sender: nevin@eviloverlord.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of nliber@gmail.com designates 2a00:1450:400c:c03::232 as permitted sender) smtp.mail=nliber@gmail.com; dkim=pass header.i=@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:9245 Archived-At: --047d7bb04f687e226f04f20ffaf9 Content-Type: text/plain; charset=ISO-8859-1 On 10 February 2014 10:30, Matthew Woehlke wrote: > Adding an "implicit" keyword would permit compilers to diagnose > constructors and/or conversion operators which are in fact implicit > according to the standard, but are not marked as such. This would provide a > mechanism to warn programmers that a constructor or conversion operator is > potentially dangerous, while allowing them to clearly specify when this is > the intent. > But you still have to support not specifying "implicit" (or break huge amounts of code), so I don't see what the keyword really buys you. -- Nevin ":-)" Liber (847) 691-1404 -- --- 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/. --047d7bb04f687e226f04f20ffaf9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On 10 February 2014 10:30, Matthew Woehlke <= mw_triad@users.sourceforge.net> wrote:
Adding an "i= mplicit" keyword would permit compilers to diagnose constructors and/o= r conversion operators which are in fact implicit according to the standard= , but are not marked as such. This would provide a mechanism to warn progra= mmers that a constructor or conversion operator is potentially dangerous, w= hile allowing them to clearly specify when this is the intent.

But you still have to support not specifyi= ng "implicit" (or break huge amounts of code), so I don't see= what the keyword really buys you.
--
=A0Nevin ":-)&quo= t; Liber=A0 <mailto:nevin@eviloverlord.com>=A0 (847) 691-1404

--
 
---
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>.
--047d7bb04f687e226f04f20ffaf9-- .