220 18656 <2622848.PbezMDS0We@tjmaciei-mobl4> article Path: news.gmane.org!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Parsing Numbers Date: Wed, 17 Jun 2015 23:42:40 -0700 Lines: 55 Approved: news@gmane.org Message-ID: <2622848.PbezMDS0We@tjmaciei-mobl4> References: <9761565.z80J1WOjpt@tjmaciei-mobl4> <5582666F.8040501@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 1434609784 20042 80.91.229.3 (18 Jun 2015 06:43:04 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 18 Jun 2015 06:43:04 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBZGQRGWAKGQE2KZNCAY@isocpp.org Thu Jun 18 08:42:57 2015 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-la0-f69.google.com ([209.85.215.69]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Z5TXB-0005R7-DY for gclcip-std-proposals@m.gmane.org; Thu, 18 Jun 2015 08:42:45 +0200 Original-Received: by labsp1 with SMTP id sp1sf18773860lab.3 for ; Wed, 17 Jun 2015 23:42:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:subject:date:message-id:user-agent :in-reply-to:references:mime-version:content-type:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=T3TrxXh81fD1JgJV6+QaJ79M43MbyRspIgmJE2z+ifs=; b=E+NZPc2F3zvixGzles4mfUhTkdNJ0Lk2RkeOCM41E5XU8rk1hnfXMe0wNe+m39bgwo TiX9vQe8vZNKrTpJZXMmpQlOAbtpdBoFAJbehvABTeuczpb7vydR2NACkFUw1+ES2j12 PdMdCefQxMYUNp/6JYZy+UCxF+2i7Ovn3yK2j0YasXkp8jIS0aiqqyCFAl+pLM4eVX+w CY/PNa81hpAzVa2ZzSWIJh3whWt+Cl5zSPP2mGqppeksKDkvkWy8NZC6qjAmfrqsAMvY pEJEKaqruG0mICWLgzCWwW0oYlSV4P/TJM0v+o8P8AOGrntyv2bw9DkGgN7KqTbhbRuJ Z7dA= X-Gm-Message-State: ALoCoQm7AMbSUpRaJDMYNaiAjsNWZbbh+yLFSmcxheZzSbBoC5LuZc9uT6dipCyydmI1MZcgz38T X-Received: by 10.152.219.166 with SMTP id pp6mr8994083lac.1.1434609764986; Wed, 17 Jun 2015 23:42:44 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.180.100.227 with SMTP id fb3ls996212wib.23.canary; Wed, 17 Jun 2015 23:42:44 -0700 (PDT) X-Received: by 10.180.205.168 with SMTP id lh8mr23916195wic.95.1434609764060; Wed, 17 Jun 2015 23:42:44 -0700 (PDT) Original-Received: from gondolin.macieira.info (gondolin.macieira.info. [78.47.120.188]) by mx.google.com with ESMTP id ui9si12334106wjc.132.2015.06.17.23.42.43 for ; Wed, 17 Jun 2015 23:42:43 -0700 (PDT) Received-SPF: pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) client-ip=78.47.120.188; Original-Received: from tjmaciei-mobl4.localnet (unknown [IPv6:2601:1c0:5803:81c9:3135:c9b3:48ac:eab5]) by gondolin.macieira.info (Postfix) with ESMTPSA id 21D4411B366 for ; Wed, 17 Jun 2015 23:42:43 -0700 (PDT) User-Agent: KMail/4.14.8 (Linux/4.0.4-1-desktop; KDE/4.14.8; x86_64; ; ) In-Reply-To: <5582666F.8040501@gmx.net> X-Original-Sender: thiago@macieira.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of thiago@macieira.org designates 78.47.120.188 as permitted sender) smtp.mail=thiago@macieira.org Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org 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:18656 Archived-At: On Thursday 18 June 2015 08:34:23 Jens Maurer wrote: > So, that means 0 and 1. Right. So no "yes" or "Yes" or "true" or localised names. > > > I imagine that the front-end template interface would be something like: > > > > > > // skip bikeshedding about input, output and error > > extern std::expected > > parse_internal(const char *begin, const char *end, > > uint64_t zero, uint64_t max, int base); > > extern std::expected > > parse_internal(const char *begin, const char *end, > > int64_t min, int64_t max, int base); > > > > > > > > template > > typename std::enable_if::value, > > std::expected>::type > > parse_number(std::string_view str, int base) > > { > > typedef typename > > std::conditional::value, > > uint64_t, int64_t>::type Int64; > > Int64 min = std::numeric_limits::min(); > > Int64 max = std::numeric_limits::max(); > > return parse_internal(str.begin(), str.end(), min, max, > > base); } > > Signed vs. unsigned parsing is probably different enough > (minus sign) that those two shouldn't be handled by the > same function. They aren't. The typedef causes the selection of a different overload based on whether it's signed or unsigned. Of course, that's internal detail: what matters is whether parse_number is documented/specified to handle the minus sign or not for a given T. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center PGP/GPG: 0x6EF45358; fingerprint: E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 -- --- 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/. .