220 2679 <510D670C.5020007@gmail.com> article Path: news.gmane.org!not-for-mail From: =?ISO-8859-1?Q?Mikael_Kilpel=E4inen?= Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: A proposal to add swap traits to the standard library Date: Sat, 02 Feb 2013 20:20:44 +0100 Lines: 37 Approved: news@gmane.org Message-ID: <510D670C.5020007@gmail.com> References: <1359827596.1381.2.camel@Nokia-N900> <41C25E3D-C254-43AE-BFEA-ED83B7DAF74E@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed X-Trace: ger.gmane.org 1359832872 24654 80.91.229.3 (2 Feb 2013 19:21:12 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 2 Feb 2013 19:21:12 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDHYRTPW4EBRBKOOWWEAKGQEAOPMLJQ@isocpp.org Sat Feb 02 20:21:33 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wg0-f69.google.com ([74.125.82.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1U1ieZ-0000sh-TP for gclcip-std-proposals@m.gmane.org; Sat, 02 Feb 2013 20:21:31 +0100 Original-Received: by mail-wg0-f69.google.com with SMTP id fn15sf5656415wgb.8 for ; Sat, 02 Feb 2013 11:21:13 -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:message-id:date:from:user-agent:mime-version:to:subject :references:in-reply-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=FcPMa9g4lTZ8AFKIdXg9kx9MpK77PQjGlDHlWJUavwU=; b=u0o2e3p4eyun2MOrLBP1BQYErjctjEXnnmUp7qh8veQfYehirfksSv9o5G/6ZZaUxl /cAQJNSE4cuj3BRfBOPkhwUh6QS9XKTKkqXCzjqAxNk+miSNlzkLqef5U+c5hlUSYdK4 M19dkDnMxZtuiFLGg6ICc2DOxLOi39I8RbIee8WJbNKii6WMO+/oQoMvb90SD8zp8dSw lxMFE5vtfteYDejiSBadXf2hUCNz5f9/AaQUynmB+EJT4XMtjqmIAUudVgoIEpTHe/VZ cUFNvchdG3MFoHWRV9B4v3ZcQaKSLfyAkYafSO X-Received: by 10.180.102.69 with SMTP id fm5mr625053wib.0.1359832873600; Sat, 02 Feb 2013 11:21:13 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.107.5 with SMTP id gy5ls421870wib.6.gmail; Sat, 02 Feb 2013 11:21:12 -0800 (PST) X-Received: by 10.14.178.196 with SMTP id f44mr53576291eem.14.1359832872849; Sat, 02 Feb 2013 11:21:12 -0800 (PST) X-Received: by 10.14.178.196 with SMTP id f44mr53576289eem.14.1359832872819; Sat, 02 Feb 2013 11:21:12 -0800 (PST) Original-Received: from mail-ee0-f43.google.com (mail-ee0-f43.google.com [74.125.83.43]) by mx.google.com with ESMTPS id d45si19577233eem.95.2013.02.02.11.21.12 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 02 Feb 2013 11:21:12 -0800 (PST) Received-SPF: pass (google.com: domain of mikael.kilpelainen@gmail.com designates 74.125.83.43 as permitted sender) client-ip=74.125.83.43; Original-Received: by mail-ee0-f43.google.com with SMTP id c50so2657597eek.2 for ; Sat, 02 Feb 2013 11:21:12 -0800 (PST) X-Received: by 10.14.214.67 with SMTP id b43mr53623865eep.33.1359832872614; Sat, 02 Feb 2013 11:21:12 -0800 (PST) Original-Received: from [192.168.1.72] (koln-4db4f39d.pool.mediaWays.net. [77.180.243.157]) by mx.google.com with ESMTPS id h5sm18810947eem.1.2013.02.02.11.21.11 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sat, 02 Feb 2013 11:21:12 -0800 (PST) User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130107 Thunderbird/17.0.2 In-Reply-To: X-Original-Sender: mikael.kilpelainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of mikael.kilpelainen@gmail.com designates 74.125.83.43 as permitted sender) smtp.mail=mikael.kilpelainen@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:2679 Archived-At: 2.2.2013 20:12, Ville Voutilainen kirjoitti: > On 2 February 2013 20:00, Howard Hinnant wrote: >> On Feb 2, 2013, at 12:53 PM, Ville Voutilainen wrote: >>> Just quickly, what's the issue with >>> noexcept(swap(x, y)) ? >> Challenge: Make this code compile without a using directive or using declaration: > Wow. I think "wtf". Utterly baffled. :) I didn't mean to say that this > proposal is > unnecessary, but your example seems to indicate it's definitely worth > considering. > In other words, I tried it quickly, and with all the expertise I have, > I don't want > to try further. Perhaps I'm missing something, but why doesn't it work? > Because you are calling the swap with ints.. so no ADL to find the std::swap .. you can make it compile by having void swap(int& a, int& b) noexcept { std::swap(a, b); } before the foo.. Or am i totally mistaken here? Mikael -- --- 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. .