220 8249 <52bdaac0.272dec0a.41c7.ffffb45d@mx.google.com> article Path: news.gmane.org!not-for-mail From: "=?utf-8?B?YmlsbHkub25lYWxAZ21haWwuY29t?=" Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: string_view::is_null() Date: Fri, 27 Dec 2013 08:28:47 -0800 Lines: 91 Approved: news@gmane.org Message-ID: <52bdaac0.272dec0a.41c7.ffffb45d@mx.google.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_0_1388161727454" X-Trace: ger.gmane.org 1388161727 31241 80.91.229.3 (27 Dec 2013 16:28:47 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 27 Dec 2013 16:28:47 +0000 (UTC) To: "=?utf-8?B?c3RkLXByb3Bvc2Fscw==?=" Original-X-From: std-proposals+bncBDKLBLVE6ADBBQOV62KQKGQE2FGNA3I@isocpp.org Fri Dec 27 17:28:52 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f200.google.com ([209.85.214.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VwaHK-0002zL-Oq for gclcip-std-proposals@m.gmane.org; Fri, 27 Dec 2013 17:28:51 +0100 Original-Received: by mail-ob0-f200.google.com with SMTP id wm4sf42137926obc.11 for ; Fri, 27 Dec 2013 08:28:49 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:to:from:subject:date:mime-version :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=s7Kfj23DJLKnJ1k3NetKwmNj0j+aqBAWTa3WscRAyj0=; b=aTpZ2fGL6uCWnOkcazxodbu/AUZMQwOg4c97RH8I9be2A0X0w+8tF28CJVyxSrED7A V9W5rNIyN9jvUWw6rmxOuTHpBld0VSIpkKSLwwac6QBtRPR+UHfQjjpTfPz1p8camAn3 Trx497SpTPcFrRzOTGda5Usj//4vy32W+nlO0pEXc7Sqy0sw780N5UD4XSf/MFm4pVD3 sT0zbJk2sXYNiSymctMNP38pxSouJTrYXQw7E21RGGyZwUaJQXdDTpETVY6818hzVtEV P8sDIwBNf1viXZT3WcpxiH5HvxepG5/L1FQ/s4xq5DCs+gzbg11zuKn75MlfJa1fmLK7 7spg== X-Gm-Message-State: ALoCoQkpnOj407nU7fK5unnQckSVRrFJc1HPj5zhMNLNMe0wugLQqvOXtoMhXqHq9fXitJzy6oxC X-Received: by 10.50.41.101 with SMTP id e5mr20889799igl.0.1388161729625; Fri, 27 Dec 2013 08:28:49 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.36.229 with SMTP id t5ls2696870qej.61.gmail; Fri, 27 Dec 2013 08:28:49 -0800 (PST) X-Received: by 10.49.110.72 with SMTP id hy8mr56343101qeb.67.1388161729018; Fri, 27 Dec 2013 08:28:49 -0800 (PST) Original-Received: from mail-gg0-x230.google.com (mail-gg0-x230.google.com [2607:f8b0:4002:c02::230]) by mx.google.com with ESMTPS id b6si12727976qca.85.2013.12.27.08.28.48 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 27 Dec 2013 08:28:49 -0800 (PST) Received-SPF: pass (google.com: domain of billy.oneal@gmail.com designates 2607:f8b0:4002:c02::230 as permitted sender) client-ip=2607:f8b0:4002:c02::230; Original-Received: by mail-gg0-f176.google.com with SMTP id l12so1910600gge.21 for ; Fri, 27 Dec 2013 08:28:48 -0800 (PST) X-Received: by 10.236.174.37 with SMTP id w25mr33651214yhl.36.1388161728769; Fri, 27 Dec 2013 08:28:48 -0800 (PST) Original-Received: from [2601:8:9780:880:55df:aec9:bc48:dfef] ([2601:8:9780:880:55df:aec9:bc48:dfef]) by mx.google.com with ESMTPSA id o27sm47250067yhb.19.2013.12.27.08.28.47 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 27 Dec 2013 08:28:48 -0800 (PST) X-Original-Sender: billy.oneal@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of billy.oneal@gmail.com designates 2607:f8b0:4002:c02::230 as permitted sender) smtp.mail=billy.oneal@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:8249 Archived-At: ------=_Part_0_1388161727454 Content-Type: text/plain; charset=ISO-8859-1 Content-Disposition: inline Because it is designed to approximate a "std::string const&" which isn't nullable either. Sent from a touchscreen. Please excuse the brevity and tpyos. ----- Reply message ----- From: abolz.lists@gmail.com To: Subject: [std-proposals] string_view::is_null() Date: Fri, Dec 27, 2013 4:52 AM Is there a reason why string_view is not nullable?Nullable here means default constructed or constructed from a nullptr (and a zero length). Then adding a is_null() (or null()) member function which can then be used to distinguish the string_view from an empty string. This should not affect data() which returns a non-null pointer. -- --- 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/. -- --- 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/. ------=_Part_0_1388161727454 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Becau= se it is designed to approximate a "std::string const&" which isn't nul= lable either.

Sent from a touchscreen. Please excu= se the brevity and tpyos.

----- Reply messa= ge -----
From: abolz.lists@gmail.com
To: <std-proposals@isocpp.org= >
Subject: [std-proposals] string_view::is_null()
Date: Fri, Dec 2= 7, 2013 4:52 AM

Is there a reason why st= ring_view is not nullable?

Nullable here means default constru= cted or constructed from a nullptr
(and a zero length). Then addi= ng a is_null() (or null()) member
function which can then be used= to distinguish the string_view from an
empty string.
<= br>

This should not affect data() which returns a non-null pointer.=

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