220 4435 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Fixing Standard Library relational operators (was: Re: optional Rev.4 (N3672): What was the rationale to remove !=, >=, ...) Date: Wed, 15 May 2013 18:03:22 +0300 Lines: 89 Approved: news@gmane.org Message-ID: References: <5f236e41-0f5f-4288-a80f-9eadb5168c38@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a11c329320adb1104dcc30d54 X-Trace: ger.gmane.org 1368630206 13850 80.91.229.3 (15 May 2013 15:03:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 15 May 2013 15:03:26 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRBOWHZ2GAKGQEK5PR64I@isocpp.org Wed May 15 17:03:26 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ie0-f197.google.com ([209.85.223.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1UcdEi-0002Y3-8v for gclcip-std-proposals@m.gmane.org; Wed, 15 May 2013 17:03:24 +0200 Original-Received: by mail-ie0-f197.google.com with SMTP id 16sf6916620iea.8 for ; Wed, 15 May 2013 08:03:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:x-beenthere:x-received:received-spf:mime-version :x-received:in-reply-to:references:date:message-id:subject:from:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-google-group-id:list-post :list-help:list-archive:list-subscribe:list-unsubscribe:content-type; bh=Nif0nmTXqg5RzZRUmb+en5kjstVL8CLykqMR1hUzL18=; b=Vnouc/5RjAM1HzjPU7YhHXSF3Z3nBAXv0iXn0nAwZD3voP0jCopOl+T8uhEVrIxpX3 /PunwWF9esT3p080N2RvKpsth3AhezR4xcdVvNxCGBaHmC+025ygizP9GvIMQyzD+gZV g0PLi7OCkGPPL+6rsm3OGMlDSyDoaf23Fns22oZfg5tifufqC6AV3wtHIx0Y8QBYfkm+ Br0Btf24olkZ86prv2IiQF44+RaxzCNDrSi+/waQz+BFr1HIC5LJE1MjAjkip1Iq4pdb /NbCbQEwbxYWHmu82/yGlI1OopIvcGlAI6QHwgwchP4/F+mG0mcMkXGrvKY7Fg2tp6iG X-Received: by 10.182.104.73 with SMTP id gc9mr10956827obb.35.1368630203363; Wed, 15 May 2013 08:03:23 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.182.144.163 with SMTP id sn3ls121452obb.56.gmail; Wed, 15 May 2013 08:03:22 -0700 (PDT) X-Received: by 10.60.42.104 with SMTP id n8mr19735309oel.94.1368630202535; Wed, 15 May 2013 08:03:22 -0700 (PDT) Original-Received: from mail-oa0-f46.google.com (mail-oa0-f46.google.com [209.85.219.46]) by mx.google.com with ESMTPS id r7si1968631oej.14.2013.05.15.08.03.22 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 15 May 2013 08:03:22 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 209.85.219.46 as permitted sender) client-ip=209.85.219.46; Original-Received: by mail-oa0-f46.google.com with SMTP id h2so2313160oag.33 for ; Wed, 15 May 2013 08:03:22 -0700 (PDT) X-Received: by 10.182.92.133 with SMTP id cm5mr17700658obb.73.1368630202389; Wed, 15 May 2013 08:03:22 -0700 (PDT) Original-Received: by 10.76.10.130 with HTTP; Wed, 15 May 2013 08:03:22 -0700 (PDT) In-Reply-To: X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 209.85.219.46 as permitted sender) smtp.mail=ville.voutilainen@gmail.com; dkim=pass header.i=@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:4435 Archived-At: --001a11c329320adb1104dcc30d54 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 15 May 2013 17:56, Andrzej Krzemie=C5=84ski wrote: > > Indeed. And failing to achieve consensus means we'll get the current >> lovely situation, where >> we can't even do opt1 !=3D opt2 because people are so concerned about >> double NaNs, apparently. >> Not for optional, not for optional, not for the gazillion >> types for which it would be useful, >> because of the holy NaN. Pardon me for the sardonic overtone, but the >> current situation has been >> designed by people who have completely lost their marbles. >> > > More: you cannot even write: if (op !=3D nullopt) > > > > I consider that a much smaller problem than not being able to not-equal compare two optionals. --=20 ---=20 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 e= mail 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-proposa= ls/?hl=3Den. --001a11c329320adb1104dcc30d54 Content-Type: text/html; charset=ISO-8859-2 Content-Transfer-Encoding: quoted-printable



On 15 May 2013 17:56, Andrzej Krzemie=F1ski <<= a href=3D"mailto:akrzemi1@gmail.com" target=3D"_blank">akrzemi1@gmail.com> wrote:

Indeed. And failing t= o achieve consensus means we'll get the current lovely situation, where=
we can't even do opt1 !=3D opt2 because people are so concerned abo= ut double NaNs, apparently.
Not for optional<int>, not for optional<string>, no= t for the gazillion types for which it would be useful,
because of the h= oly NaN. Pardon me for the sardonic overtone, but the current situation has= been
designed by people who have completely lost their marbles.

More: you cannot even write: if (op != =3D nullopt)




I consider that a much= smaller problem than not being able to not-equal compare two optionals.

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