220 33687 <9f6c436a-852c-4665-bf9f-91415491cdec@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: galaxy.wars@gmx.at Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: string_view for fstream::open() Date: Tue, 8 Aug 2017 10:59:44 -0700 (PDT) Lines: 77 Approved: news@gmane.org Message-ID: <9f6c436a-852c-4665-bf9f-91415491cdec@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_2684_1761852047.1502215184920" X-Trace: blaine.gmane.org 1502215184 1186 195.159.176.226 (8 Aug 2017 17:59:44 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 8 Aug 2017 17:59:44 +0000 (UTC) Cc: bop@gmb.dk To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDC4D254TYORBEPYU7GAKGQEBFG4OGA@isocpp.org Tue Aug 08 19:59:40 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qt0-f199.google.com ([209.85.216.199]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1df8n6-0008VK-H0 for gclcip-std-proposals@m.gmane.org; Tue, 08 Aug 2017 19:59:40 +0200 Original-Received: by mail-qt0-f199.google.com with SMTP id d15sf18774348qta.11 for ; Tue, 08 Aug 2017 10:59:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:message-id:in-reply-to:references:subject :mime-version:x-original-sender:reply-to:precedence:mailing-list :list-id:list-post:list-help:list-archive:list-subscribe :list-unsubscribe; bh=KIDbezvvJB3siVlOR9BuidjWcQNM7peagA2repNFQj8=; b=NYUnJVhsZYh8SJlHWZGKjaiTz8VMFrJfVDagGZGDsFGaX7RX1vbXjT83V3TyWAIhpb CuuIHbgWqtjxtIhbcA3UBj8uLMZXZExiQgzk40N73RnWOAejvQO1bkSMbsguYMOfJY3u e9wu7skOoQ46NmbS1FatHEWFfW09IG+ZoX14ueh7stJn9yZR/TZQQUvyNTcJMdXc0Z8w sE8C6m/Ah79nsLuumuP7VkRmwNn5VwCTBxFPrYEPPr7LAZuuqwCHudy30OTmEsDQnzy5 0IaTLuvtlL3RYzHy4YD0xffZJR0vgEHG7pApF/HPlKQv9az/alU4/z489/IYPtIlwEym UmKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:message-id:in-reply-to :references:subject:mime-version:x-original-sender:reply-to :precedence:mailing-list:list-id:x-spam-checked-in-group:list-post :list-help:list-archive:list-subscribe:list-unsubscribe; bh=KIDbezvvJB3siVlOR9BuidjWcQNM7peagA2repNFQj8=; b=suerhOzoGKcNwbr3BaKcCWXY0RO5cXW4eNPckeyjScSUH3XB2hXwnbjaPUz/pg1eha MznodQXBuMvHmP7ip5olscrK2Hq/OR3rfCPcePh5kBd14k7SN84JStcgzqjns0X/tRMW K3o+M0J9OJuUzp9QhDLkadKGIhKakhSECdrvVaBa8w6t2jXY3SWys57KanjDfJnWogj9 qR3QN9vtVzpUYRJ5iffL/29yZcn1alvydaPAwwnyUwIsAKmdxkDdcNi44TS3Et75tTCZ isPDIQ/+4Gi72pRVxmXjeargMB7W/FK71uh7x/5W0ZZ628jYikszDS8YvUqZXxNzzYh7 N3pQ== X-Gm-Message-State: AHYfb5g2GKLJf7XvpKt7ss2xssc4VWvtVZEuvgfGde+6Xzaxs0Mga4BO 754vDefdLQJ9VPQq X-Received: by 10.200.53.215 with SMTP id l23mr3213352qtb.33.1502215186738; Tue, 08 Aug 2017 10:59:46 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.172.109 with SMTP id m45ls4258319iti.11.canary-gmail; Tue, 08 Aug 2017 10:59:45 -0700 (PDT) X-Received: by 10.31.157.209 with SMTP id g200mr27925vke.9.1502215185332; Tue, 08 Aug 2017 10:59:45 -0700 (PDT) In-Reply-To: X-Original-Sender: galaxy.wars@gmx.at 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:33687 Archived-At: ------=_Part_2684_1761852047.1502215184920 Content-Type: multipart/alternative; boundary="----=_Part_2685_380692044.1502215184920" ------=_Part_2685_380692044.1502215184920 Content-Type: text/plain; charset="UTF-8" Am Dienstag, 8. August 2017 19:52:02 UTC+2 schrieb Bo Persson: > One objection is that the file name is supposed to be a nul-terminated > string. The string_view is not required to be that. > > > Bo Persson > > > I realize that this is the current state, which is why I said that I'd have to create a temporary std::string from a std::string_view if I want to open a file-stream safely; otherwise I could just call the "const char* filename" overload from std::string_view::data(). Is there any technical reason why the filename would have to be nul-terminated? Otherwise one could simply make an implementation for open() that does not require a nul-terminated string but rather a (const char* filename, size_t size) pair. -- 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. 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Am Dienstag, 8. August 2017 19:52:02 UTC+2 schrieb Bo Pers= son:
=C2=A0
One o= bjection is that the file name is supposed to be a nul-terminated=20
string. The string_view is not required to be that.


=C2=A0 =C2=A0 =C2=A0Bo Persson



I realize that this is the current state, which i= s why I said that I'd have to create a temporary std::string from a std= ::string_view if I want to open a file-stream safely; otherwise I could jus= t call the "const char* filename" overload from std::string_view:= :data().

Is there any technical reason why the filename would have t= o be nul-terminated? Otherwise one could simply make an implementation for = open() that does not require a nul-terminated string but rather a (const ch= ar* filename, size_t size) pair.

--
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To view this discussion on the web visit https://groups.google.= com/a/isocpp.org/d/msgid/std-proposals/9f6c436a-852c-4665-bf9f-91415491cdec= %40isocpp.org.
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