220 29840 article Path: news.gmane.org!.POSTED!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: New smart pointer: CopyConstructible and CopyAssignable flavor of unique_ptr Date: Fri, 16 Dec 2016 17:51:51 +0200 Lines: 22 Approved: news@gmane.org Message-ID: References: <13702f32-32c2-447f-9996-3624fd678675@isocpp.org> <67a9e9ed-8748-4098-a43b-33598b516464@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: blaine.gmane.org 1481903516 30812 195.159.176.226 (16 Dec 2016 15:51:56 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 16 Dec 2016 15:51:56 +0000 (UTC) To: "ISO C++ Standard - Future Proposals" Original-X-From: std-proposals+bncBC5JHI7A7ALRBGE32DBAKGQEAABT5IY@isocpp.org Fri Dec 16 16:51:52 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pg0-f72.google.com ([74.125.83.72]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cHunV-0006xq-7x for gclcip-std-proposals@m.gmane.org; Fri, 16 Dec 2016 16:51:49 +0100 Original-Received: by mail-pg0-f72.google.com with SMTP id g186sf193776027pgc.2 for ; Fri, 16 Dec 2016 07:51:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :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=SBdaUB+RlEuhQDGJDrE+IiFnorzB5NGIBPbEzdcabw8=; b=efX/mxWRgH8WF+f+okLqv37UgRgy7BNk08varVxsm+9h/M7Nr/zJquskxvKk3qOSo8 nwOIEUYOMH1KksqG+bOLVCv8YNZdQs2JM6bU5LCaV3IY6hGaMaFIq+Oi7vaLQEDCTCsP AfvPObIp2vJaxKvo/LyHXA4S/NJ7cumKAC2+7s/fyUehUrYednGwvr1yTuGVVIKb7Qho 5J3Z+lxQzL54V7DlYv8Lr7uoxWAuaN72UGve2ITab9PX182G9JODJ+mrrRCGYYe8dEop f8sIhg/dt/S1eC1FJ4luZ+5To5Sp7ogz2aWqqNmbQ51c3yRCcW3YmuPyQ64DcwShR0UL RALA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to: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=SBdaUB+RlEuhQDGJDrE+IiFnorzB5NGIBPbEzdcabw8=; b=X10RmcpqJJQNJ6xpqTYpVTT5QM2bryhwDDO58dw3HAzurNMT+1faZoq54eEkjvlYh4 6q+Slr4heyBcE9HnjBAIuGEej+YHOS9rhSiiwtKcbKvmFy2nZ0nq/vPEZOS3fuKC2vuB eJCyHSa3Ok029EGiThG2Y5Is6l4UwYV4ZOSxM7QiSIcjk+Vg7ZUu+nj1NrHSK4t3QBTJ Oi06Sy8j7mHWRsSBtDRkS9nVKOacfNeLFdnSE4v3E8WQ3Lzth9aOlqOrqK2bTMS61XCV izvEk0lMUx01tqDyNX0Ma+hloMW0EcKt204snN9sMb9acNMk1/2+gUyno2DZykVC6foi MQIQ== X-Gm-Message-State: AKaTC03sUFjxjVo2Bs2yrS//HH+vZ7Fmb93SMzwkB9Th1JdzXWMLmBh1M8FAqSyvq6aDsA== X-Received: by 10.99.164.25 with SMTP id c25mr1776353pgf.114.1481903513345; Fri, 16 Dec 2016 07:51:53 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.23.193 with SMTP id j59ls8948925otj.24.gmail; Fri, 16 Dec 2016 07:51:52 -0800 (PST) X-Received: by 10.31.137.139 with SMTP id l133mr1468993vkd.155.1481903512573; Fri, 16 Dec 2016 07:51:52 -0800 (PST) Original-Received: from mail-vk0-x236.google.com (mail-vk0-x236.google.com. [2607:f8b0:400c:c05::236]) by mx.google.com with ESMTPS id y66si2303593vkf.86.2016.12.16.07.51.52 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 16 Dec 2016 07:51:52 -0800 (PST) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c05::236 as permitted sender) client-ip=2607:f8b0:400c:c05::236; Original-Received: by mail-vk0-x236.google.com with SMTP id p9so90613083vkd.3 for ; Fri, 16 Dec 2016 07:51:52 -0800 (PST) X-Received: by 10.31.171.196 with SMTP id u187mr1526351vke.22.1481903512228; Fri, 16 Dec 2016 07:51:52 -0800 (PST) Original-Received: by 10.103.50.74 with HTTP; Fri, 16 Dec 2016 07:51:51 -0800 (PST) In-Reply-To: <67a9e9ed-8748-4098-a43b-33598b516464@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c05::236 as permitted sender) smtp.mailfrom=ville.voutilainen@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:29840 Archived-At: On 16 December 2016 at 17:46, Nicol Bolas wrote: > The only question is how deep the copy goes: whether you're creating a `T` > itself or some class derived from `T`. In these problem areas the latter, even if I have a deepcopyinghandle. Copying or even cloning a T itself is not all that difficult if it likes to be cloned. It's much harder to clone a U when all you have is a handle to a T, and that sort of deep copying is a real life-saver when provided by an easy-to-use library facility. It makes otherwise hard problems trivial, or rather allows focusing on the actual problem rather than the cloning mechanics. -- 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/CAFk2RUYkuueANAWE%3DRpdt6t%2B%3D38Q_FpLvrdJbtQmP6HSRfdD-g%40mail.gmail.com. .