220 2817 article Path: news.gmane.org!not-for-mail From: Tony V E Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: minimal enum class improvements Date: Tue, 12 Feb 2013 15:15:14 -0500 Lines: 61 Approved: news@gmane.org Message-ID: References: <511AA1A2.2080409@wanadoo.fr> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1360700122 28903 80.91.229.3 (12 Feb 2013 20:15:22 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 12 Feb 2013 20:15:22 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCUZ5QWKNQINHRPKRACRUBF3TWZ5W@isocpp.org Tue Feb 12 21:15:43 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ea0-f200.google.com ([209.85.215.200]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1U5MGO-00049a-0a for gclcip-std-proposals@m.gmane.org; Tue, 12 Feb 2013 21:15:36 +0100 Original-Received: by mail-ea0-f200.google.com with SMTP id d14sf521832eaa.7 for ; Tue, 12 Feb 2013 12:15:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:x-beenthere:x-received: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:content-transfer-encoding; bh=oRcifj1Co1GnXQ1o/KdSfDWirv4+P6nrUZ3zmR+AmT4=; b=AmOqaswfxz4wRQkAu8wmAaOxgFi2U907H6ZFRmwaDfqup1X+34Q6GWmowDT6c+BU+x VMt9mdaC2A8NO29/wqNGrrkDV3Sa8FNwvHbcD3gpS76CfurjHhg0VyObZ8y4OIYS4bnd ZTo2dEWH4PEX/cXzhh8SFXk9/NLp2+9qS5Ae7dVQcKqCYG0JHbOd6xihxGBHeFRsL4c+ 8karTbxJAtGkM+56WOy+xMEMUkephJd5OC0VwsZ0Y2/66gc6tKLjDBNnK5T0tsPJRSHL 72/Aey8eiggd30po4AP9Oxt X-Received: by 10.112.37.230 with SMTP id b6mr2120258lbk.13.1360700116264; Tue, 12 Feb 2013 12:15:16 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.108.110 with SMTP id hj14ls17696lab.64.gmail; Tue, 12 Feb 2013 12:15:15 -0800 (PST) X-Received: by 10.152.110.6 with SMTP id hw6mr6132071lab.43.1360700115239; Tue, 12 Feb 2013 12:15:15 -0800 (PST) X-Received: by 10.152.110.6 with SMTP id hw6mr6132068lab.43.1360700115222; Tue, 12 Feb 2013 12:15:15 -0800 (PST) Original-Received: from mail-lb0-f180.google.com (mail-lb0-f180.google.com [209.85.217.180]) by mx.google.com with ESMTPS id w7si19136497lba.168.2013.02.12.12.15.15 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 12 Feb 2013 12:15:15 -0800 (PST) Received-SPF: pass (google.com: domain of tvaneerd@gmail.com designates 209.85.217.180 as permitted sender) client-ip=209.85.217.180; Original-Received: by mail-lb0-f180.google.com with SMTP id q12so413171lbc.11 for ; Tue, 12 Feb 2013 12:15:15 -0800 (PST) X-Received: by 10.112.36.165 with SMTP id r5mr7816452lbj.112.1360700115004; Tue, 12 Feb 2013 12:15:15 -0800 (PST) Original-Received: by 10.112.14.75 with HTTP; Tue, 12 Feb 2013 12:15:14 -0800 (PST) In-Reply-To: <511AA1A2.2080409@wanadoo.fr> X-Original-Sender: tvaneerd@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of tvaneerd@gmail.com designates 209.85.217.180 as permitted sender) smtp.mail=tvaneerd@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:2817 Archived-At: On Tue, Feb 12, 2013 at 3:10 PM, Vicente J. Botet Escriba wrote: > Le 11/02/13 14:55, ricardofabianodeandrade@gmail.com a =E9crit : > > Hi all, > > > > Request for change: > > Inclusion of the following features in the C++ language support for enum: > > Obtain the number of enumerators of a given enum type. > Obtain the value of an enumerator of a given enumerator's index (or order= , > or position) and its enum type. > > > I would add to the minimal set of features this > * obtain the position relative of an enumeration value in the enum > type. > > This requires of course that all the enumerations have a distinct value. = The > compiler could not provide these meta-functions if the enum doesn't satis= fy > this condition. > In addition, the allowed values of an 'ordinal' enumeration type should > contain only the enumerations because otherwise the pos function could no= t > be defined. This is a breaking change or require adding a specific syntax > for 'ordinal' enumeration. Maybe using a new ordinal keyword instead of e= num > could be an option > > ordinal class AnEnum : int { a =3D -1, b =3D 1000, c =3D 0 }; > I happen to have code using the word 'ordinal', so I think I would prefer: enum ordinal AnEnum : int { a =3D -1, b =3D 1000, c =3D 0 }; Also, how about some real world scenarios/code that would make good use of these features? ie prove they are worth it. Tony --=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. .