220 18137 article Path: news.gmane.org!not-for-mail From: Matthew Woehlke Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Parsing Numbers Date: Fri, 22 May 2015 10:05:48 -0400 Lines: 35 Approved: news@gmane.org Message-ID: References: <555CDDEF.8000002@gmx.net> <555ECB8E.9010606@gmx.net> 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 1432303572 32449 80.91.229.3 (22 May 2015 14:06:12 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 22 May 2015 14:06:12 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCO5FYHBU4ERBRPP7SVAKGQENQZUV7Y@isocpp.org Fri May 22 16:06:03 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-lb0-f200.google.com ([209.85.217.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1YvnaK-0000xc-2T for gclcip-std-proposals@m.gmane.org; Fri, 22 May 2015 16:06:00 +0200 Original-Received: by lbbqj7 with SMTP id qj7sf5367206lbb.1 for ; Fri, 22 May 2015 07:05:59 -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=g/+tt2S91qmQsLKWwJxeabpvC7JDyE+WQLJExlOBS9o=; b=OxNjF4khsPHyMIZMzBZtH26T+owL24+0SNlYO33SJfqXgjJMZAZIqyEVWfq4e6Gltq kyLgn089u9QQ4cNsFFRT//SP0Kwrf0FhSwZRTKjgOMl2sYi/nLp5UK58Bu4rVZR50mFC nBsYbM2Vcip82ESX0wd2Z0K3xL5QR6KVeasqmL5+mUzOWBG4m5kln4n3Ejc8nbBlvY1g 0UohvrrpCw98UZLdAorVYqFJwKIJsOdightoKpDEJs87xQMZf5XPB2aOcTGhio2qJmC1 5FJLouip/BHu6pBCGftKYZ5ay2COvyDxob2RLbn43Qi1b2OeTRMT4Oifnmw5UbBlcMEY DzWw== X-Gm-Message-State: ALoCoQn3yU4BpqOHUuZ7IeqDfSuD7AFnBpj2Yp2c3RjBp/7jkKKbmzACOq27jDDGDaQHf7fErbqE X-Received: by 10.112.219.200 with SMTP id pq8mr7981819lbc.7.1432303559668; Fri, 22 May 2015 07:05:59 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.37.105 with SMTP id x9ls514252laj.11.gmail; Fri, 22 May 2015 07:05:57 -0700 (PDT) X-Received: by 10.152.3.97 with SMTP id b1mr6653493lab.54.1432303557256; Fri, 22 May 2015 07:05:57 -0700 (PDT) Original-Received: from plane.gmane.org (plane.gmane.org. [80.91.229.3]) by mx.google.com with ESMTPS id sw10si1448947lbb.158.2015.05.22.07.05.56 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Fri, 22 May 2015 07:05:56 -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 1YvnaD-0000st-Ud for std-proposals@isocpp.org; Fri, 22 May 2015 16:05:54 +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 ; Fri, 22 May 2015 16:05:53 +0200 Original-Received: from mw_triad by tripoint.kitware.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 22 May 2015 16:05:53 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 26 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:18137 Archived-At: On 2015-05-22 04:25, Olaf van der Spek wrote: > 2015-05-22 8:24 GMT+02:00 Jens Maurer : >> My focus here is to make the low-level functions available to >> users. I'm not against providing some high-level functions, too. >> (The C++ standard currently does not offer low-level functions; >> strtoul is locale-dependent, which slows it down substantially. >> See also N4412.) > > Right, locales.. > Should a locale-aware variant be provided? > A locale-unaware one? > Both? > Should the locale be a parameter? IMHO, yes (both). Locale-aware because dealing with locales is hard, and we should not require the user to do this. ASCII-only because there will be cases where that is all that is needed (reading machine-written data) and because the performance is much, much faster. I would probably go with something like 'parse(...)' (ASCII-only) and 'parse_l(..., std::locale* = nullptr)' which uses the current locale if none is provided (and possibly falls back on the fast ASCII-only if the locale is 'C'). -- Matthew -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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