220 2761 article Path: news.gmane.org!not-for-mail From: Nevin Liber Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: optional references -- take 2 Date: Wed, 6 Feb 2013 21:25:09 -0600 Lines: 61 Approved: news@gmane.org Message-ID: References: <8d57e9e9-e4cc-441c-abeb-e6526531fad5@isocpp.org> <3534ECE0-D67E-443E-9593-76B644FDDF6A@gmail.com> <3aca8f41-7a21-40d8-9bf9-9c27dfa778f3@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=0016e68dce83cccc7004d519ff2a X-Trace: ger.gmane.org 1360207555 22376 80.91.229.3 (7 Feb 2013 03:25:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 7 Feb 2013 03:25:55 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCE35H5S6IDBBPN5ZSEAKGQESLVIOVY@isocpp.org Thu Feb 07 04:26:16 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-vb0-f72.google.com ([209.85.212.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1U3I7l-0002V3-GS for gclcip-std-proposals@m.gmane.org; Thu, 07 Feb 2013 04:26:09 +0100 Original-Received: by mail-vb0-f72.google.com with SMTP id ft2sf2710177vbb.7 for ; Wed, 06 Feb 2013 19:25:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:x-beenthere:x-received:x-received:received-spf :x-received: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:x-google-group-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type; bh=ggEy9bTJyAHkzj4iYlWCMYAk1aX+Asofay0jBHVtAaI=; b=Ie5biBhaZdGq7fPP4yEkvApUebHgPMd8cxYmNNAl03/pGMu77o9/kT+L3pEgrgOO/W omlxNzlbcbUPYAY/s0hdLKG5hr0OKTNR1on78vF5Jqw1XV6l6cLHzkECje7py+mv/tVE BRCT1I9MENXvZHoZoatjPuXoEjDrYhcyEXpGvzEC6Xv1gLmOBXLVtzPizx4m+QT7wpkz qOoFYzcs70PDpYWHzJ5HZcy0nsWZmDv1GjkBYR36eP4F4Z/xXsgSnrWKux3br1zri4/2 buw2U729J187v5+xhlt3y4R9ralPGim2cV3yFiMkTq X-Received: by 10.224.176.196 with SMTP id bf4mr274901qab.4.1360207550097; Wed, 06 Feb 2013 19:25:50 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.0.67 with SMTP id 3ls593377qec.81.gmail; Wed, 06 Feb 2013 19:25:49 -0800 (PST) X-Received: by 10.49.1.47 with SMTP id 15mr25408656qej.46.1360207549731; Wed, 06 Feb 2013 19:25:49 -0800 (PST) X-Received: by 10.49.1.47 with SMTP id 15mr25408654qej.46.1360207549693; Wed, 06 Feb 2013 19:25:49 -0800 (PST) Original-Received: from mail-qc0-f179.google.com (mail-qc0-f179.google.com [209.85.216.179]) by mx.google.com with ESMTPS id o3si15390528qes.11.2013.02.06.19.25.49 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 06 Feb 2013 19:25:49 -0800 (PST) Received-SPF: pass (google.com: domain of nliber@gmail.com designates 209.85.216.179 as permitted sender) client-ip=209.85.216.179; Original-Received: by mail-qc0-f179.google.com with SMTP id b40so808660qcq.38 for ; Wed, 06 Feb 2013 19:25:49 -0800 (PST) X-Received: by 10.229.175.140 with SMTP id ba12mr41583qcb.13.1360207549352; Wed, 06 Feb 2013 19:25:49 -0800 (PST) Original-Sender: nliber@gmail.com Original-Received: by 10.49.24.211 with HTTP; Wed, 6 Feb 2013 19:25:09 -0800 (PST) In-Reply-To: <3aca8f41-7a21-40d8-9bf9-9c27dfa778f3@isocpp.org> X-Original-Sender: nliber@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of nliber@gmail.com designates 209.85.216.179 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:2761 Archived-At: --0016e68dce83cccc7004d519ff2a Content-Type: text/plain; charset=ISO-8859-1 On 6 February 2013 20:40, Nicol Bolas wrote: > That's really the question I have about this whole `optional` thing: > what exactly is the use case for this functionality that `T*` can't also > cover? > How about optional? -- 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/?hl=en. --0016e68dce83cccc7004d519ff2a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
On 6 February 2013 20:40, Nicol Bolas <jmcke= sson@gmail.com> wrote:
That's really the question I have about this whole `optional<T&= amp;>` thing: what exactly is the use case for this functionality that `= T*` can't also cover?

How about optional<T&&>?--
=A0Nevin ":-)" Liber=A0 <mailto:nevin@eviloverlord.com>=A0 (8= 47) 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-pro= posals/?hl=3Den.
 
 
--0016e68dce83cccc7004d519ff2a-- .