220 29137 article Path: news.gmane.org!.POSTED!not-for-mail From: Bo Persson Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Removing trivial undefined behaviour Date: Wed, 26 Oct 2016 22:01:44 +0200 Lines: 32 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: text/plain; charset=UTF-8; format=flowed X-Trace: blaine.gmane.org 1477512164 19456 195.159.176.226 (26 Oct 2016 20:02:44 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 26 Oct 2016 20:02:44 +0000 (UTC) User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCZ6RLW3UIKBBSMXYTAAKGQEXLWP22Q@isocpp.org Wed Oct 26 22:02:40 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f72.google.com ([74.125.82.72]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bzUOt-0001N1-HF for gclcip-std-proposals@m.gmane.org; Wed, 26 Oct 2016 22:02:15 +0200 Original-Received: by mail-wm0-f72.google.com with SMTP id b80sf18444912wme.5 for ; Wed, 26 Oct 2016 13:02:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=to:from:subject:date:lines:message-id:references:mime-version :user-agent:in-reply-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=GCFKe+vn0zpgPIu7W6/IeXThJSyHvul2e+FklwhPJnA=; b=b0wOER5hHxwn57ekD32mPwpQNIy05GY1mmavFJV9AxYp8dSHhJ8hcGrfl0ib0/epXJ 5CfZLd1vxh/eAJSrK1Lv0gNoO/WVQmUBCoRALfs7mTBuwJG0P6N6tTC3qt3PiFSXeA4a /xAaB7D6jGCc8/P2S3FsucxIwLWcD2lrEVzCnSUgFdr1tbbLSTySTNeYtxR8N6aX0neS DTPbXblRlmbzYHqQsTN/h/13wpNACnuuCFKe5JeY02AppaOIpM/XOIVvoD3yGyuecPUa aKSXt7kFTNJ0siwjsC2lpNYooh65wQYrKXqI2JUsEMjabLOPwmE4yK6r0UY1J/ixmmee jNVQ== 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:user-agent:in-reply-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=GCFKe+vn0zpgPIu7W6/IeXThJSyHvul2e+FklwhPJnA=; b=PRY/X51plOtL2gTBk6fQRxMXyR3KRBTNllNS6X/Y4vka/kVVD7ZBO5f9KLGgUohAQ8 J6IFcoJLfIaC1PzUgfGR7rSmf9fTaKU5YfYaq2huyc6d++Qi5JZMzwOZIpr70dV1zme3 Czzu3+ocEKgvA2wVpSHePP74B69y38Rm3Uco4KoO3NxJtFDvPgal/olvb4M4atMPrNf+ d7v98+pRrUFdxT5Wmsm5IHVowZ2hFoVjn+wPlaOziqK2fpForYgkITiSw+VmhTynG0wB sYJzv1aYASJWgezn/Jn/EoziAeU0+XfzIwhvVi21Km4MHWCX2D+6FDZrlpnVw/eb7YCk DS5w== X-Gm-Message-State: ABUngvfZR8HqJHKZNQlIJP6/i+913tJA1q6TlezwxEtKBnk5rGeOtwiTYvZHnajjXH/1jA== X-Received: by 10.194.82.170 with SMTP id j10mr364730wjy.14.1477512138234; Wed, 26 Oct 2016 13:02:18 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.25.135.4 with SMTP id j4ls201005lfd.51.gmail; Wed, 26 Oct 2016 13:02:16 -0700 (PDT) X-Received: by 10.25.37.78 with SMTP id l75mr3007694lfl.41.1477512136962; Wed, 26 Oct 2016 13:02:16 -0700 (PDT) Original-Received: from blaine.gmane.org ([195.159.176.226]) by mx.google.com with ESMTPS id s189si2553553lfs.319.2016.10.26.13.02.16 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 26 Oct 2016 13:02:16 -0700 (PDT) Received-SPF: neutral (google.com: 195.159.176.226 is neither permitted nor denied by best guess record for domain of gclcip-std-proposals@m.gmane.org) client-ip=195.159.176.226; Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1bzUOd-00089L-Ru for std-proposals@isocpp.org; Wed, 26 Oct 2016 22:01:59 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 25 Original-X-Complaints-To: usenet@blaine.gmane.org In-Reply-To: X-Original-Sender: gclcip-std-proposals@m.gmane.org X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 195.159.176.226 is neither permitted nor denied by best guess record for domain of gclcip-std-proposals@m.gmane.org) smtp.mailfrom=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:29137 Archived-At: On 2016-10-26 09:20, 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. > This goes all the way back to "implicit int" in K&R C, where a call f(c) to an undeclared function f was assumed to implicitly declare "int f(int)". If that wasn't fixable in the 1980's, because of expected code breakage, it is WAY too late to change that now. Bo Persson -- 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/nur234%24m5a%241%40blaine.gmane.org. .