220 29089 article Path: news.gmane.org!.POSTED!not-for-mail From: Tony V E Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Removing trivial undefined behaviour Date: Wed, 26 Oct 2016 09:19:11 -0400 Lines: 99 Approved: news@gmane.org Message-ID: References: <35daf87a-bf1d-46de-b16c-c2965fbadc8f@isocpp.org> <9e242562-aba1-4f8d-8e0a-b2de34f6a10b@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=089e013d1d9c8bef1a053fc4788e X-Trace: blaine.gmane.org 1477487969 4880 195.159.176.226 (26 Oct 2016 13:19:29 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 26 Oct 2016 13:19:29 +0000 (UTC) To: Standard Proposals Original-X-From: std-proposals+bncBCUZ5QWKNQINDWWCYACRUBEMMD7OI@isocpp.org Wed Oct 26 15:19:24 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f70.google.com ([74.125.82.70]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bzO6p-0007Vd-TS for gclcip-std-proposals@m.gmane.org; Wed, 26 Oct 2016 15:19:11 +0200 Original-Received: by mail-wm0-f70.google.com with SMTP id q6sf14431659wmg.15 for ; Wed, 26 Oct 2016 06:19:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :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=HpyW1oDBMQCQrl7UqDgB3bSMoyRFm2p5SzdowlrEwuo=; b=kenUpce8Viw1HIZyY0TgnAl/h/Ixr9utgrGlWdhIA53VOKhvcyCk624L2taoaUyGXv HiXgC4f60K9tEKBmSKISnI83ulXY5mRHoswl3a+uycwOVFI3Os9NUE17L8MUVbr1L14+ NFRAR9uv3OnOEmurOvwmjlxX3uxtTvjXwC7xV06IR68P8xx/MaXBM78KkpP5dqmFpK1c Pmb+2h/hZCqH3lD2vI2snZPir3oeeVpcZmnxgcH9fIKDUj6RzPQIHesz3MgNdJ9Eh50a umyDIbqnACmwIZrTcwIiuEEdmsdmYCO5sxyaFWLzezFTdmQuUbRLKatt4RRy8Laj8Ehp p2ug== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to: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=HpyW1oDBMQCQrl7UqDgB3bSMoyRFm2p5SzdowlrEwuo=; b=eaLRSxpL37Z50fNrgRkU0FKigZuCa3AjdrjDQd6cMVbq0bCHKdrgc2IRGhmRRI+Vu1 u6PEEQDNxeBMJuz59D5crv1zhIuQ366g1fN0fL0A19punFiD1hwhs8+Ln3oUYtquR1WH SQbwwvVYmQ8+BKZuAwAwl9IBCaCFtTN7hxikxNhmsc5L1+KLRDXeUsolUMkWq2nH4VFe r7Efyb1gmMf3Ye3X5Wx7KJOkVSKCpFqgYYGhH21vPd3ACPAu8yiHoj41VsfrX+ugxCIj tUDGC5NuXQowIiPXlxw6wa/jMogie1pUsB3GhuVllildCWaTsJLtwc6J0XwEvb4TIt+V 7UqA== X-Gm-Message-State: ABUngveYzEuEEqAkUVLHCwc8MJG3BcWMmdjdBAf1ixYtWpEpp9n6kFlt/ZjhqmbNLdf/Yw== X-Received: by 10.28.31.129 with SMTP id f123mr228865wmf.17.1477487954526; Wed, 26 Oct 2016 06:19:14 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.25.37.147 with SMTP id l141ls120533lfl.19.gmail; Wed, 26 Oct 2016 06:19:13 -0700 (PDT) X-Received: by 10.25.217.210 with SMTP id s79mr1558690lfi.50.1477487952969; Wed, 26 Oct 2016 06:19:12 -0700 (PDT) Original-Received: from mail-wm0-x234.google.com (mail-wm0-x234.google.com. [2a00:1450:400c:c09::234]) by mx.google.com with ESMTPS id s7si1187155lja.28.2016.10.26.06.19.12 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Oct 2016 06:19:12 -0700 (PDT) Received-SPF: pass (google.com: domain of tvaneerd@gmail.com designates 2a00:1450:400c:c09::234 as permitted sender) client-ip=2a00:1450:400c:c09::234; Original-Received: by mail-wm0-x234.google.com with SMTP id d128so84976464wmf.1 for ; Wed, 26 Oct 2016 06:19:12 -0700 (PDT) X-Received: by 10.194.177.230 with SMTP id ct6mr2269596wjc.145.1477487952128; Wed, 26 Oct 2016 06:19:12 -0700 (PDT) Original-Received: by 10.28.105.156 with HTTP; Wed, 26 Oct 2016 06:19:11 -0700 (PDT) In-Reply-To: X-Original-Sender: tvaneerd@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of tvaneerd@gmail.com designates 2a00:1450:400c:c09::234 as permitted sender) smtp.mailfrom=tvaneerd@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:29089 Archived-At: --089e013d1d9c8bef1a053fc4788e Content-Type: text/plain; charset=UTF-8 On Wed, Oct 26, 2016 at 4:28 AM, T. C. wrote: > > > On Wednesday, October 26, 2016 at 3:20:55 AM UTC-4, Hans Guijt wrote: >> >> >> On Wednesday, October 26, 2016 at 9:11:26 AM UTC+2, T. C. wrote: >>> >>> >>> Because they are meant to be used as isdigit((unsigned char) c). >>> >> >> Great, in that case I'm sure there is no opposition to changing the >> signature to reflect this requirement? It's a much cleaner solution than >> requiring a cast in every invocation, after all. >> >> >> > The reason they take int is because they also accept EOF. That's C's > style, for better or worse. > > In any event, there's no way in hell C++ is going to change this. It's a > massive C compatibility break. > We could maybe overload the function: int isdigit(int c); bool isdigit(char c); No idea if that is a good idea. > > -- Be seeing you, Tony -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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On Wed, Oct 26, 2016 at 4:28 AM, T. C. <rs2740@gmail.com>= wrote:


On Wednesday, October 26, 2016 at 3:20:55 AM UTC-4, Hans Guijt wro= te:

On Wednesda= y, October 26, 2016 at 9:11:26 AM UTC+2, T. C. wrote:

Because they are mea= nt to be used as isdigit((unsigned char) c).
= =C2=A0
Great, in that case I'm sure there is no opposition to= changing the signature to reflect this requirement? It's a much cleane= r solution than requiring a cast in every invocation, after all.


The reason they take i= nt is because they also accept EOF. That's C's style, for better or= worse.

In any event, there's no way in hell C= ++ is going to change this. It's a massive C compatibility break.
=

We could maybe overload the function= :

int isdigit(int c);
bool isdigit(char c);=

No idea if that is a good idea.


--
Be seeing you,
=
Tony

--
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