220 8745 article Path: news.gmane.org!not-for-mail From: Marshall Clow Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: string_view::is_null() Date: Mon, 20 Jan 2014 12:14:03 -0800 Lines: 66 Approved: news@gmane.org Message-ID: References: <104254A6-C69A-4571-8455-89D7E466D493@gmail.com> <6a95bf9c-55c9-4ae2-966f-d1b1f4df6a37@isocpp.org> <52D9E336.1060801@knejp.de> <1B534FD7-B385-4A7E-A718-3C73F0AB61DC@gmail.com> <11f13f8f-1270-427c-8942-94027a181ff4@isocpp.org> <20140119174431.GA16875@faust.lysator.liu.se> <20140119192238.GA19497@faust.lysator.liu.se> <60842af6-5ec4-4364-b2d5-a0be9d578bd6@isocpp.org> <6c82c4ae-c144-443a-81b2-ea1a6b645601@isocpp.org> <1006922a-7e3c-45d8-9a93-773c0df5d9f1@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (Mac OS X Mail 7.1 \(1827\)) Content-Type: multipart/alternative; boundary="Apple-Mail=_A5434CFD-9E09-45B8-83F8-E7E2FBA5BA34" X-Trace: ger.gmane.org 1390248847 30731 80.91.229.3 (20 Jan 2014 20:14:07 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 20 Jan 2014 20:14:07 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDHIXP53REBRBEUH62LAKGQEP7PM7IA@isocpp.org Mon Jan 20 21:14:12 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f198.google.com ([209.85.214.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1W5LEZ-0000xK-Vw for gclcip-std-proposals@m.gmane.org; Mon, 20 Jan 2014 21:14:12 +0100 Original-Received: by mail-ob0-f198.google.com with SMTP id wp4sf10925637obc.9 for ; Mon, 20 Jan 2014 12:14:11 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:message-id:mime-version:subject:date :references:to: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; bh=uWk0vJu+l8aYsR05oCTDCEKXSzBWX1CDsGQ8N6Be/KI=; b=YwXsSGGHHf/7oc5vCv0AMH/ZbiKj8Dd0Bi/Uv+pxot55PuXXLzqvXA4aj/hmQaazoI Aj+W9m8duSVELAIi2l+5KNLI7Xt7bsy7yZT+qi6EOgP4H/CE+DlVGc9+4ty+AmQ9gB6q gvGZSHHq54x3Ka7u4CAd9OUjfXzxvzLov3+/kbrt/1a3aFhbD3lbGuy3TD2r2ayo6kod SPUsSTPP9ych0V1gAYlrtJFsko0U0t+tGmb1PdJpReirl/B1bindbaXFNTgpQdyfiMPB 1b5IfxrHFuq/qR3X6+1xhfCx6in+O3KZqxMPk2Xw1WOkhEqetHQZngaM3KKj2b+dDI+V YFYg== X-Gm-Message-State: ALoCoQkr383KVIulisbo9d8w6JYkzUTw++Dk2nbuNyRw+lWqlBkySxDIPYG4EPfUxMEvCMYfQroR X-Received: by 10.182.60.37 with SMTP id e5mr7321279obr.30.1390248850987; Mon, 20 Jan 2014 12:14:10 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.94.51 with SMTP id cz19ls650078qeb.57.gmail; Mon, 20 Jan 2014 12:14:10 -0800 (PST) X-Received: by 10.236.124.17 with SMTP id w17mr59549yhh.147.1390248850284; Mon, 20 Jan 2014 12:14:10 -0800 (PST) Original-Received: from mail-pa0-x22f.google.com (mail-pa0-x22f.google.com [2607:f8b0:400e:c03::22f]) by mx.google.com with ESMTPS id j50si2561925yhc.200.2014.01.20.12.14.10 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 20 Jan 2014 12:14:10 -0800 (PST) Received-SPF: pass (google.com: domain of mclow.lists@gmail.com designates 2607:f8b0:400e:c03::22f as permitted sender) client-ip=2607:f8b0:400e:c03::22f; Original-Received: by mail-pa0-f47.google.com with SMTP id kp14so7395956pab.6 for ; Mon, 20 Jan 2014 12:14:09 -0800 (PST) X-Received: by 10.68.198.68 with SMTP id ja4mr20592277pbc.24.1390248849228; Mon, 20 Jan 2014 12:14:09 -0800 (PST) Original-Received: from eyefive.qualcomm.com (EyeFive.qualcomm.com. [129.46.76.91]) by mx.google.com with ESMTPSA id jn12sm5631464pbd.37.2014.01.20.12.14.07 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 20 Jan 2014 12:14:08 -0800 (PST) In-Reply-To: <1006922a-7e3c-45d8-9a93-773c0df5d9f1@isocpp.org> X-Mailer: Apple Mail (2.1827) X-Original-Sender: mclow.lists@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of mclow.lists@gmail.com designates 2607:f8b0:400e:c03::22f as permitted sender) smtp.mail=mclow.lists@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:8745 Archived-At: --Apple-Mail=_A5434CFD-9E09-45B8-83F8-E7E2FBA5BA34 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 On Jan 20, 2014, at 9:18 AM, Paul Tessier wrote: > I would also argue against string_view( char* ) doing runtime null checks= and creating an empty view, as this only defends against ( P =3D=3D null )= and not P being in protected memory, of which null falls into.=20 I agree.=20 string_view(char *) should require that the char * point to a null terminat= ed string. =97 Marshall --=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/. --Apple-Mail=_A5434CFD-9E09-45B8-83F8-E7E2FBA5BA34 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 On Jan 20, 2014, at 9:= 18 AM, Paul Tessier <phernost@gmai= l.com> wrote:

I would also argue against string_view( char* ) doing runtime= null checks and creating an empty view, as this only defends against ( P = =3D=3D null ) and not P being in protected memory, of which null falls into= .. 

I agree. 
string_= view(char *) should require that the char * point to a null terminated stri= ng.

=97 Marshall


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