220 13980 <54413B5E.4020800@gmx.net> article Path: news.gmane.org!not-for-mail From: Jens Maurer Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Default values for n4191 fold expressions Date: Fri, 17 Oct 2014 17:53:02 +0200 Lines: 40 Approved: news@gmane.org Message-ID: <54413B5E.4020800@gmx.net> References: <997390c5-072b-407a-bce9-22a29fc5e228@isocpp.org> <346c989f-5000-450c-ae9e-ccd2fb22f1ee@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 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1413561199 8694 80.91.229.3 (17 Oct 2014 15:53:19 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 17 Oct 2014 15:53:19 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDPMTYGK64JRBYPWQSRAKGQESRETINI@isocpp.org Fri Oct 17 17:53:12 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f69.google.com ([209.85.215.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Xf9pz-00028E-EH for gclcip-std-proposals@m.gmane.org; Fri, 17 Oct 2014 17:53:07 +0200 Original-Received: by mail-la0-f69.google.com with SMTP id q1sf645797lam.0 for ; Fri, 17 Oct 2014 08:53:07 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state: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:list-post:list-help:list-archive:list-subscribe :list-unsubscribe:content-type:content-transfer-encoding; bh=nINYdJCwXN0EOF0iafR6BOKkhqmLNLzP+Llu1MYvZnQ=; b=S+WzPN2vtRUXy4hbeZdKmiAOi6TsfE6RqxkWhxB8AyaFDOf/7l4aGPx9NV+M1+U2ne w3p3lW0qnAxekumOcs7yL8OCafQvquktcW4gaOMS25yXFOM4oPJJmXik1eA3ghyZJK+8 4z/JV0B+UXkqZzduJ6VyXlYSXPMk7jMeo17ZGr7sLSorrg97XEyaorK6TkikdVHDUxx+ lANlTDhsCNpctlDjdip2u3a7jQ91DObRnSYIt171vIFjHr94he5d+OmKxG26HL9NwgPK FJoxlo7Xvs83gUyriCe6M+CyZ4S/SMmiQtyfUD9127ofi+df7LuzSPUqs92yBD5Q0M/1 bac X-Gm-Message-State: ALoCoQm+CEriQy3JGpeNoL5aKGd/729KcgR0SwicPJwCxSqcNFlf4fL9ge0a6Ax4s1+EWVtf2Vai X-Received: by 10.180.98.165 with SMTP id ej5mr780692wib.1.1413561187112; Fri, 17 Oct 2014 08:53:07 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.3.132 with SMTP id c4ls250991lac.88.gmail; Fri, 17 Oct 2014 08:53:04 -0700 (PDT) X-Received: by 10.152.234.199 with SMTP id ug7mr9852125lac.26.1413561184738; Fri, 17 Oct 2014 08:53:04 -0700 (PDT) Original-Received: from mout.gmx.net (mout.gmx.net. [212.227.15.18]) by mx.google.com with ESMTPS id l3si2634219laf.89.2014.10.17.08.53.04 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 17 Oct 2014 08:53:04 -0700 (PDT) Received-SPF: pass (google.com: domain of Jens.Maurer@gmx.net designates 212.227.15.18 as permitted sender) client-ip=212.227.15.18; Original-Received: from [192.168.2.100] ([178.7.71.65]) by mail.gmx.com (mrgmx002) with ESMTPSA (Nemesis) id 0MbPPQ-1XOjPo04we-00IjA4 for ; Fri, 17 Oct 2014 17:53:04 +0200 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:6.0.1) Gecko/20110830 Thunderbird/6.0.1 In-Reply-To: <346c989f-5000-450c-ae9e-ccd2fb22f1ee@isocpp.org> X-Provags-ID: V03:K0:Pk/TisqgrGC77/YJkioUhv98QE2fW1ak6fEXLSpAcMMog7Dr4aB fAn3YOi3ZA+zAQwT3Kekwu7do7pfb39PgzvOqDUTkV1aLCespFWhg2Pg5L6D2Bb3ssm1Uwr 8avNpXTiEzeWb48oXRYSgb7gutt74tUJOgRO3v2q0eUNfU6VR7oXn3ysb8hh8w2DAhpi3fH jzllz+5InItAKV7fSyu/Q== X-UI-Out-Filterresults: notjunk:1; X-Original-Sender: Jens.Maurer@gmx.net X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of Jens.Maurer@gmx.net designates 212.227.15.18 as permitted sender) smtp.mail=Jens.Maurer@gmx.net 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:13980 Archived-At: On 10/17/2014 09:12 AM, Sean Middleditch wrote: > On Wednesday, October 15, 2014 7:22:47 PM UTC-7, Richard Smith wrote: >=20 > while if it is a prvalue int this gives a string of length 1 cont= aining a nul character. >=20 >=20 > Yes, there's some risk this might happen accidentally. (If you antici= pate the problem, you can write "auto s =3D (to_string(args) + ... + std::s= tring());".) But it seems like a mistake that std::string implicitly conver= ts from an int in a surprising way, and fixing that might be a better appro= ach for this particular problem. >=20 >=20 > Can it be fixed without breaking user code? That's probably hard. We could have a std::string(int) =3D delete constructor overload that catches literal "0", but std::string(const char *) is certainly in widespread use. Jens --=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/. .