220 13986 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Default values for n4191 fold expressions Date: Fri, 17 Oct 2014 22:14:22 +0300 Lines: 43 Approved: news@gmane.org Message-ID: References: <997390c5-072b-407a-bce9-22a29fc5e228@isocpp.org> <346c989f-5000-450c-ae9e-ccd2fb22f1ee@isocpp.org> <54413B5E.4020800@gmx.net> 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 1413573272 3355 80.91.229.3 (17 Oct 2014 19:14:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 17 Oct 2014 19:14:32 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRBDWVQWRAKGQEIWBMVCY@isocpp.org Fri Oct 17 21:14:24 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-oi0-f71.google.com ([209.85.218.71]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XfCym-0002Oq-Ko for gclcip-std-proposals@m.gmane.org; Fri, 17 Oct 2014 21:14:24 +0200 Original-Received: by mail-oi0-f71.google.com with SMTP id v63sf5741522oia.6 for ; Fri, 17 Oct 2014 12:14:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from: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=D1s0RERBpHzZISdj28drLu0FcvDDMlFZdX5bq4qWz7s=; b=RTv6YBKoM9zo4V7gpfXEv13oKHKMoPuCtHBHXNX7wei43VHjCJLulC6J+e//MNX2sO 3wBdsO+3W3OK8nE/PrnD4a+oI+EpkX4QafTjB9VaZ3WygPf8Wt2mngushmbPREt9bZZH +ahkum2z9sgNKCW9dQ2ZtRK+3SJ6zLfJHRzRvlWTUKFHkWLAV9WTf2bAhjioZurB6l1f GEjHncINhWkxCatVbaQ0ugnWhtU4eqeUJrSsSW61i01Oduw8N70lOsp+Md+swP1PQxGi mFckAJHZ6CAP+oWnDH8XMIqlQd0N9hOH8WpEDqETdgJcM89e/3P2JG7jB7YP2SSXxTmo SHwA== X-Gm-Message-State: ALoCoQkslIHaJcjq60RAaV2jOfS9WpE5FAKW43DsiGmdqdPxjdISyf5ayXAAL68j7R2clvVYQ61Y X-Received: by 10.43.133.131 with SMTP id hy3mr9608160icc.12.1413573263397; Fri, 17 Oct 2014 12:14:23 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.106.13 with SMTP id gq13ls418052obb.27.gmail; Fri, 17 Oct 2014 12:14:22 -0700 (PDT) X-Received: by 10.60.68.108 with SMTP id v12mr2628220oet.69.1413573262533; Fri, 17 Oct 2014 12:14:22 -0700 (PDT) Original-Received: from mail-ob0-x22c.google.com (mail-ob0-x22c.google.com. [2607:f8b0:4003:c01::22c]) by mx.google.com with ESMTPS id b191si2377199oid.11.2014.10.17.12.14.22 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 17 Oct 2014 12:14:22 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:4003:c01::22c as permitted sender) client-ip=2607:f8b0:4003:c01::22c; Original-Received: by mail-ob0-f172.google.com with SMTP id vb8so1138346obc.17 for ; Fri, 17 Oct 2014 12:14:22 -0700 (PDT) X-Received: by 10.182.125.165 with SMTP id mr5mr2618666obb.71.1413573262203; Fri, 17 Oct 2014 12:14:22 -0700 (PDT) Original-Received: by 10.76.151.36 with HTTP; Fri, 17 Oct 2014 12:14:22 -0700 (PDT) In-Reply-To: <54413B5E.4020800@gmx.net> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:4003:c01::22c as permitted sender) smtp.mail=ville.voutilainen@gmail.com; dkim=pass header.i=@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:13986 Archived-At: On 17 October 2014 18:53, Jens Maurer wrote: > On 10/17/2014 09:12 AM, Sean Middleditch wrote: >> On Wednesday, October 15, 2014 7:22:47 PM UTC-7, Richard Smith wrote: >> >> while if it is a prvalue int this gives a string of length 1 con= taining a nul character. >> >> >> Yes, there's some risk this might happen accidentally. (If you antic= ipate the problem, you can write "auto s =3D (to_string(args) + ... + std::= string());".) But it seems like a mistake that std::string implicitly conve= rts from an int in a surprising way, and fixing that might be a better appr= oach for this particular problem. >> >> >> 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. See https://groups.google.com/a/isocpp.org/d/msg/std-discussion/ZD0aGGkZjPk/cyo= ND1x4VfUJ --=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/. .