220 33447 <2570492.NpxuI0RVu0@tjmaciei-mobl1> article Path: news.gmane.org!.POSTED!not-for-mail From: Thiago Macieira Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Proposal: underlying_cast Date: Sun, 30 Jul 2017 09:20:17 -0700 Lines: 29 Approved: news@gmane.org Message-ID: <2570492.NpxuI0RVu0@tjmaciei-mobl1> References: <6a2c32ed-99b5-4cc5-86a5-ee3cc07567a3@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" X-Trace: blaine.gmane.org 1501431628 19654 195.159.176.226 (30 Jul 2017 16:20:28 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 30 Jul 2017 16:20:28 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCB4TK757YBRBRMO7DFQKGQEB7R5WSA@isocpp.org Sun Jul 30 18:20:21 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pf0-f200.google.com ([209.85.192.200]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dbqx0-0004WW-28 for gclcip-std-proposals@m.gmane.org; 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[78.47.120.188]) by mx.google.com with ESMTP id s16si10291211ita.101.2017.07.30.09.20.21 for ; Sun, 30 Jul 2017 09:20:21 -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-mobl1.localnet (unknown [IPv6:2601:1c0:4501:5f9f:fd1e:b479:f06b:403]) by gondolin.macieira.info (Postfix) with ESMTPSA id C2B2F11B58A for ; Sun, 30 Jul 2017 09:20:19 -0700 (PDT) In-Reply-To: <6a2c32ed-99b5-4cc5-86a5-ee3cc07567a3@isocpp.org> 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.mailfrom=thiago@macieira.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:33447 Archived-At: On Sunday, 30 July 2017 04:50:41 PDT james.a.cooper@gmail.com wrote: > C++ allows enums to have an underlying type specified. When serialising > enum values it's important to use the correct type. > This proposal is to add a utility function that casts an enum type to its > underlying value. This would make it easier to handle > enum types in function overloads for serialisation. For example: > > template > std::ostream& write(std::ostream& os, const T& v) > { > os << std::underlying_cast(v); > return os; > } Yes on the convenience, but "underlying_cast" is the wrong name because this does not look like a regular cast. Something like "std::underlying_value" might be better. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Software Architect - Intel Open Source Technology Center -- 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/2570492.NpxuI0RVu0%40tjmaciei-mobl1. .