220 33706 <8bff939d-098b-4797-85fc-bf286ab4423f@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: olafvdspek@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: string_view for fstream::open() Date: Wed, 9 Aug 2017 02:35:12 -0700 (PDT) Lines: 105 Approved: news@gmane.org Message-ID: <8bff939d-098b-4797-85fc-bf286ab4423f@isocpp.org> References: <9f6c436a-852c-4665-bf9f-91415491cdec@isocpp.org> <9fedbad3-c6f6-4dbe-a215-814666c52c6b@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_5202_848359589.1502271312100" X-Trace: blaine.gmane.org 1502271313 17883 195.159.176.226 (9 Aug 2017 09:35:13 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 9 Aug 2017 09:35:13 +0000 (UTC) Cc: bop@gmb.dk To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBC5NB45SSABBBUFOVPGAKGQEAT6FB7Y@isocpp.org Wed Aug 09 11:35:08 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-io0-f197.google.com ([209.85.223.197]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dfNOO-0004PW-4b for gclcip-std-proposals@m.gmane.org; Wed, 09 Aug 2017 11:35:08 +0200 Original-Received: by mail-io0-f197.google.com with SMTP id j32sf47868771iod.15 for ; Wed, 09 Aug 2017 02:35:14 -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=aUcWYIPATMhRyKpWpCIcM8A63ptYNEkw2LxKmGXPBvA=; b=ouCD8/3e7KNTL5vCsL9dIj2FJu9Bz6U/vcUnCpdbs4jKOdoRzM97/Vs+fsY//4zpmt bs4UHsglvcMafXHzQICZnTl+21MBFj8iw3t0APhcCj89/nIgUWeTAHFM6WVI8CmouSFr JUqvYfbIdC5TZ1b+xcpbhB5FFdhDY2EqmEJLhzbMre7xEfLAnBcwEP0Y7UfqkB4IinLY v3OpXh4/CvDagIs5Aa7e0mjO6pUs3YSTX4O0djJIhF2r+au7MBarhg0lP03OwbpBqCW7 CVUE+O+VAVogtveJDeefyM5cVEE8nmT+5kCBT7TtF0060a2VT5kcj0GnFt8ZqErwAe1N lIdQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; 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=aUcWYIPATMhRyKpWpCIcM8A63ptYNEkw2LxKmGXPBvA=; b=F/wsH3wN+dvvO7a9CbOnmqzZf7mIN04HeqrWZyr3NUJLR8LAZ+Eq4DGDfSLDxCl6ap BMaFC0fUd+gatU2D9crsZcdic7oGotPzWizLeoRTV2QoyFMxwE30JHb5ga1Fr79Cvhsp qR34m5nrOton1fV9R9Ni4BbumVDGY0fqcM6IJfQRn3xEzIDMnvzN8u6pllCHqsSY0LiV qZfqnKdO43x6gDW86WzE57S70sWUiYnZTK6zPbYAV/ikKGuW4lF/R3ADrPGvAY/Fx4YY +zOuXr7ANDv1836UKx83r1hSrOuHa9Sxq9/x39wHZwfsFNmqR7MuctoZ86InIpzjygSH b8Aw== 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=aUcWYIPATMhRyKpWpCIcM8A63ptYNEkw2LxKmGXPBvA=; b=nYrV6QzQz/bBy6IU3unTGXhouiOQFCD5kR6pjZkwnib2yvS/fcRVE9+ztxq66o14+r BudH9yvvGhR/DLVfYr8Bx9/xPDiMAr4K/2Mnycnn8RNP4wX2nur5R/74ypCnxk76urrP 1tjH+fudW1UETzP+YPeC4rMPIZGMIqrTCxmraXFS5lAJWBh9utw/X0RYwcHYjEYz25Aj hNFSNbaAIWtPiG1lK4/xJO5A5GUQEoaXNYxFk7GdvvjP4xsIFlxIBanIN/wBSgILDrcH 2mUyu616xVfLbkat1JL1IhevhVegNTM87a/0+AfX/2b56lJapRGBN8BpaKTSA/l4pED6 C6kg== X-Gm-Message-State: AIVw113FdG3oXDVapOEpJRdW5pLPF4ikVFoMbO/lRJL5RN+xB0MhSE9x vZC+Ctvgn3HeAF9R X-Received: by 10.107.32.11 with SMTP id g11mr4288390iog.76.1502271314032; Wed, 09 Aug 2017 02:35:14 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.36.25.69 with SMTP id b66ls5099875itb.19.canary-gmail; Wed, 09 Aug 2017 02:35:12 -0700 (PDT) X-Received: by 10.31.5.203 with SMTP id 194mr45319vkf.29.1502271312707; Wed, 09 Aug 2017 02:35:12 -0700 (PDT) In-Reply-To: X-Original-Sender: olafvdspek@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:33706 Archived-At: ------=_Part_5202_848359589.1502271312100 Content-Type: multipart/alternative; boundary="----=_Part_5203_1411174733.1502271312100" ------=_Part_5203_1411174733.1502271312100 Content-Type: text/plain; charset="UTF-8" Op dinsdag 8 augustus 2017 20:54:53 UTC+2 schreef Nicol Bolas: > > On Tuesday, August 8, 2017 at 2:16:24 PM UTC-4, Julian Watzinger wrote: >> >> Ah, I see. I definately agree on the notion that in this case, its better >> that I create a copy myself. >> >> Is there any chance that low-level APIs will be moving away from >> nul-terminated strings in the future? >> > > I rather doubt it. It's hardly high on most people's priority lists. > > Having a lot of low-level functions require a nul-terminated string kind >> of dampends the overall usefulness of string_view IMHO. >> > > Which is why I wrote my own `zstring_view` class, which explicitly > represents a view of a NUL-terminated string (it treats the NUL-terminator > the same way `std::string` does; you can look at it, but it's not > explicitly part of the `begin/end` range). It has some of the operations of > `string_view` (thanks to inheritance), but it removes or alters the ones > that subdivide from the end. For obvious reasons. > > At least from what I can tell after a few days worth of porting to >> string_view - at first I though it would be a direct replacement for most >> places where "const std::string&" was being used, but now it seems there's >> a lot more consideration to be done, not to end up with more >> temporaries/allocations than before. >> > > You have exactly expressed why I wrote `zstring_view`. > Any plans to propose it for standardization? -- 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. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/8bff939d-098b-4797-85fc-bf286ab4423f%40isocpp.org. ------=_Part_5203_1411174733.1502271312100 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable


Op dinsdag 8 augustus 2017 20:54:53 UTC+2 schreef = Nicol Bolas:
O= n Tuesday, August 8, 2017 at 2:16:24 PM UTC-4, Julian Watzinger wrote:
Ah, I see. I definately= agree on the notion that in this case, its better that I create a copy mys= elf.

Is there any chance that low-level APIs will be moving away fr= om nul-terminated strings in the future?

I rathe= r doubt it. It's hardly high on most people's priority lists.
Having a l= ot of low-level functions require a nul-terminated string kind of dampends = the overall usefulness of string_view IMHO.

= Which is why I wrote my own `zstring_view` class, which explicitly represen= ts a view of a NUL-terminated string (it treats the NUL-terminator the same= way `std::string` does; you can look at it, but it's not explicitly pa= rt of the `begin/end` range). It has some of the operations of `string_view= ` (thanks to inheritance), but it removes or alters the ones that subdivide= from the end. For obvious reasons.

At least from what I can tell after a few da= ys worth of porting to string_view - at first I though it would be a direct= replacement for most places where "const std::string&" was b= eing used, but now it seems there's a lot more consideration to be done= , not to end up with more temporaries/allocations than before.

You have exactly expressed why I wrote `zstring_view`.

Any plans to propose it for stan= dardization?=C2=A0

--
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To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
To post to this group, send email to std-proposals@isocpp.org.
To view this discussion on the web visit https://groups.google.= com/a/isocpp.org/d/msgid/std-proposals/8bff939d-098b-4797-85fc-bf286ab4423f= %40isocpp.org.
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