220 9282 <1908685.x2fBXFHVm8@tjmaciei-mobl4> article Path: news.gmane.org!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: add "implicit" keyword? Date: Tue, 11 Feb 2014 10:11:48 -0800 Lines: 41 Approved: news@gmane.org Message-ID: <1908685.x2fBXFHVm8@tjmaciei-mobl4> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1392142375 31195 80.91.229.3 (11 Feb 2014 18:12:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 11 Feb 2014 18:12:55 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBLWQ5GLQKGQEQZKVQSA@isocpp.org Tue Feb 11 19:13:05 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ie0-f199.google.com ([209.85.223.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WDHpQ-0007wK-CV for gclcip-std-proposals@m.gmane.org; Tue, 11 Feb 2014 19:13:04 +0100 Original-Received: by mail-ie0-f199.google.com with SMTP id lx4sf7842026iec.10 for ; Tue, 11 Feb 2014 10:13:03 -0800 (PST) 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:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-transfer-encoding:content-type; bh=Vrpgy79TL22NKNIzPsUt5F34R+NuiUajEm4HTD/TqgM=; b=DIEalwiMukdnLPPSx1FabXkMmKT9x8GZLs4SVubDou0y86EXgga0V796mTO6KTqbl5 v/JEm/5W0yr/3zNbOJOE1PKxZkoMnJv6jm1JbHxZPNg+yoKpOQiXDnnMkBdzlLZS6/uy 2HGPvj8OBuKPQMOQzEIeVaKPxOonqUk0Ek6pDRHE8tk88MV+N3aiOoSAOL8W/jV+2GFN SHd6V3hqM0uCW5ni0Unq4tuWagH5zxRJsWlNuRyCsVJb/Wy8grQZdRqnAC4TMTT58dvn XvQ+s+VM1qiAolF99UBJGRRgAcB+xSFcFChVlBwa+t73gb58usrbOn7+l+QXm9Fxb1Wy TC8 X-Gm-Message-State: ALoCoQnJnGWNlkFuWXe111jsh52uJsERPt1ggJbeTkr10S1fWm/U27FKntn3TDllWDYQnM4jMqNk X-Received: by 10.43.103.136 with SMTP id di8mr620icc.14.1392142383499; Tue, 11 Feb 2014 10:13:03 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.85.133 with SMTP id n5ls2564315qgd.64.gmail; Tue, 11 Feb 2014 10:13:02 -0800 (PST) X-Received: by 10.236.27.49 with SMTP id d37mr2306980yha.128.1392142382082; Tue, 11 Feb 2014 10:13:02 -0800 (PST) Original-Received: from gondolin.macieira.info (gondolin.macieira.info. [2a01:4f8:d13:f81:21c:14ff:fe01:12a3]) by mx.google.com with ESMTP id 6si13027548qgy.186.2014.02.11.10.13.01 for ; Tue, 11 Feb 2014 10:13:01 -0800 (PST) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 2a01:4f8:d13:f81:21c:14ff:fe01:12a3 as permitted sender) client-ip=2a01:4f8:d13:f81:21c:14ff:fe01:12a3; Original-Received: from tjmaciei-mobl4.localnet (unknown [134.134.139.76]) by gondolin.macieira.info (Postfix) with ESMTPSA id 5E44211A60E for ; Tue, 11 Feb 2014 10:13:00 -0800 (PST) User-Agent: KMail/4.11.5 (Linux/3.11.10-7-desktop; KDE/4.11.5; 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 2a01:4f8:d13:f81:21c:14ff:fe01:12a3 as permitted sender) smtp.mail=thiago@macieira.org 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:9282 Archived-At: Em seg 10 fev 2014, =E0s 11:30:32, Matthew Woehlke escreveu: > Objective: > ---------- > Create a new keyword "implicit", having the meaning 'not "explicit"'.=20 > That is, this keyword would annotate that a constructor or conversion=20 > operator is allowed to be called in a manner that would be denied by=20 > 'explicit'. [snip] I think it's a good idea and I support. For example, in KDE we have a policy: every one-argument constructor must= =20 either have the "explicit" keyword or must have "implicit" in a comment on = the=20 same line[1]. Then we have an after-the-fact source code checker that verif= ies=20 everything and produces warnings. A keyword woud allow us to dump that part of the script and just enable a= =20 compiler warning, or even a -Werror. [1] the rule wasn't updated to deal with C++11 initialisation lists. --=20 Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center PGP/GPG: 0x6EF45358; fingerprint: E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 --=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/. .