220 16060 <2900481.dbBOWPyqhq@tjmaciei-mobl4> article Path: news.gmane.org!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: const T* operator->() const Date: Thu, 05 Feb 2015 16:03:14 -0800 Lines: 39 Approved: news@gmane.org Message-ID: <2900481.dbBOWPyqhq@tjmaciei-mobl4> References: <56a7727d-9839-45c9-be72-a6ecb61f38c9@isocpp.org> 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 1423181003 9161 80.91.229.3 (6 Feb 2015 00:03:23 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 6 Feb 2015 00:03:23 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBSMJ2CTAKGQEQYM2DTY@isocpp.org Fri Feb 06 01:03:22 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-we0-f197.google.com ([74.125.82.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YJWOI-00022l-Dv for gclcip-std-proposals@m.gmane.org; Fri, 06 Feb 2015 01:03:22 +0100 Original-Received: by mail-we0-f197.google.com with SMTP id l61sf7972445wev.0 for ; Thu, 05 Feb 2015 16:03:21 -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:content-type:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=+eXkhpHMRp6PrJWexRCnnSi7XV1oKLOQ24HB/cdg6vk=; b=S9DVIk0sjjbJd/WSJtjQdLxNlTU/MlorXvWHtIKy4kVVZwwPFQEgSvOnpZaphhj+J2 YrlJ8UcYwNvPJNCwH1/ZTVidMLducAybg5cV87IB6RTKJAj1QblgWnCgConECTEf9l72 FL/tO4BjSYHTdVOsuq2/AEliF8w1JaFdd3SQ41kKSPxT8ROY0Vm1YANAJys8Tic+9xbd X+FxccfWaX4Ny1bT15Siu6Qq4eIy9xCoMTNZxVd5/Sbckw/VAoX5tMkQvZKyYlAPNqV+ miBCMQUSjf5LPJNMZ+LdpIpWvPk5uN2Q+CyIY4Dfsj6jaoNSszQc55m2ODIkGST5T7R+ QxoQ== X-Gm-Message-State: ALoCoQmHXtWUBV+1E75PTWjCbrEE1MVZwEQdXIO5g+g+F1jPT0Y9DTyPcw9HTsbRkXdf0Qt0kxkW X-Received: by 10.152.243.3 with SMTP id wu3mr76455lac.6.1423181001855; Thu, 05 Feb 2015 16:03:21 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.12.139 with SMTP id y11ls36748wib.9.canary; Thu, 05 Feb 2015 16:03:20 -0800 (PST) X-Received: by 10.180.37.33 with SMTP id v1mr1594620wij.76.1423181000636; Thu, 05 Feb 2015 16:03:20 -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 li1si1200144wjc.90.2015.02.05.16.03.18 for ; Thu, 05 Feb 2015 16:03:18 -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 (jfdmzpr01-ext.jf.intel.com [134.134.139.70]) by gondolin.macieira.info (Postfix) with ESMTPSA id DB82011A60E for ; Thu, 5 Feb 2015 16:03:16 -0800 (PST) User-Agent: KMail/4.14.4 (Linux/3.11.10-25-desktop; KDE/4.14.4; 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:16060 Archived-At: On Thursday 05 February 2015 22:23:32 mobi phil wrote: > Well... ideas are often coming from mistakes that are conceptually not > necessarily mistakes in a certain context. > The "->" operator is an unary operator, though intuitively myself I tend > often to think it as as a binary operator, with second parameter what is on > the right side. Definitively the language would be richer if there would be > a mechanism to have overload also based on the right hand. Obviously one > would need to support stuff like: > > (this is rather meta-C++) > template > Widget::operator->( RightHandType ) { > return (what is intended).RightHandType; > } > > but this is just yet another mental-*turbation, far from ever taken > seriously. > > Definitively it would help to implement what I thought for COW. QSharedDataPointer does COW using operator->. However, it copies when you call the non-const operator->, even if your use is read-only. -- 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 -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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