220 17982 article Path: news.gmane.org!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Parsing Numbers Date: Tue, 19 May 2015 10:42:23 -0400 Lines: 31 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1432046568 14917 80.91.229.3 (19 May 2015 14:42:48 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 19 May 2015 14:42:48 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCO5FYHBU4ERBXUX5WVAKGQELEU4MMQ@isocpp.org Tue May 19 16:42:40 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wi0-f198.google.com ([209.85.212.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YuijA-000598-5A for gclcip-std-proposals@m.gmane.org; Tue, 19 May 2015 16:42:40 +0200 Original-Received: by wivs14 with SMTP id s14sf8539624wiv.1 for ; Tue, 19 May 2015 07:42:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:date:lines:message-id:references :mime-version:content-type:user-agent: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; bh=JqrjywZCoUMmfF9hXbMfCzY35wsonBDjOc9nUbyHYpc=; b=KyYRlbOpWz/iufBnA/qVWwldRFYD7bzmkx2P7iyQWHvc/k3wSu8v55mrGsO2buXEkm 55GHx1OQxTIawev8Aphu28SNULwGOcynXm8pMQFYH5pmScaZv6Z0+PyyMfXVOaQBXkp8 Wd+wS2O1rmRhAnQANAfd25FNWjnHn1V5s2Ck2dFRJ0cPyBRsur9VST9VQl5sY2m63RXi UyirHi9hAfj8a7AaOtH2dXzr12vii20VuDuiD9XPR70Oz1Fq2U2tFjVrGP5v97/PsPR0 vNOiBy7S056WK9CxIq+52lYv2UkPnRGASygkem1fUofNPMFFqSjr0dQXVSDhPdogzF9i fvaQ== X-Gm-Message-State: ALoCoQkMONLItKv6TpXRXvEchd2tYxgoqrFEEg2Xk7jUUhJ5qsbcZbtTboJzSyvHLI+A5VUpWOQ4 X-Received: by 10.194.5.229 with SMTP id v5mr22212290wjv.0.1432046559477; Tue, 19 May 2015 07:42:39 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.4.73 with SMTP id i9ls69670lai.100.gmail; Tue, 19 May 2015 07:42:37 -0700 (PDT) X-Received: by 10.112.210.103 with SMTP id mt7mr21548029lbc.27.1432046557545; Tue, 19 May 2015 07:42:37 -0700 (PDT) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id kp20si9127129lbb.109.2015.05.19.07.42.37 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 19 May 2015 07:42:37 -0700 (PDT) Received-SPF: pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) client-ip=80.91.229.3; Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1Yuij5-000585-S8 for std-proposals@isocpp.org; Tue, 19 May 2015 16:42:36 +0200 Original-Received: from tripoint.kitware.com ([66.194.253.20]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 19 May 2015 16:42:35 +0200 Original-Received: from mw_triad by tripoint.kitware.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 19 May 2015 16:42:35 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 22 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: tripoint.kitware.com User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 In-Reply-To: X-Original-Sender: mw_triad@users.sourceforge.net X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of gclcip-std-proposals@m.gmane.org designates 80.91.229.3 as permitted sender) smtp.mail=gclcip-std-proposals@m.gmane.org 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:17982 Archived-At: On 2015-05-18 18:09, 'Jeffrey Yasskin' via ISO C++ Standard - Future Proposals wrote: > On Mon, May 18, 2015 at 2:40 PM, Matthew Woehlke wrote: >> Actually, I agree with the other Matthew Fioravante's suggestion of >> mutating the input string_view / iterators. (Maybe we should just >> support this like 'parse(in, &in)' and making sure that is efficient.) > > This one gathered an objection at > https://groups.google.com/a/isocpp.org/d/msg/std-proposals/Hs1s2329FCo/dl9N2GnXfxQJ, > that the potential aliasing between the const char* and the > string_view itself can cause problems. That sounds like a QOI issue. It also sounds like something that vendors should be able to fix / work around. > I suspect any problems can be fixed with a careful implementation, Yes. Don't modern compilers have a way to tell the compiler to assume that two entities do not alias? -- Matthew -- --- 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. 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