220 26489 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Naming base-classes Date: Wed, 29 Jun 2016 16:58:35 +0300 Lines: 49 Approved: news@gmane.org Message-ID: References: <99925bbf-8c85-4274-8d30-2bc640ad3900@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Trace: ger.gmane.org 1467208732 17283 80.91.229.3 (29 Jun 2016 13:58:52 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Jun 2016 13:58:52 +0000 (UTC) To: "ISO C++ Standard - Future Proposals" Original-X-From: std-proposals+bncBC5JHI7A7ALRBDFIZ65QKGQEF3QJDMI@isocpp.org Wed Jun 29 15:58:38 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f199.google.com ([209.85.214.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bIG0k-0007Mj-6c for gclcip-std-proposals@m.gmane.org; Wed, 29 Jun 2016 15:58:38 +0200 Original-Received: by mail-ob0-f199.google.com with SMTP id fq2sf104354084obb.2 for ; Wed, 29 Jun 2016 06:58:37 -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=3EfTKelrBml41g/ema+MvDS6/lPSTh8Kboc33+T36t8=; b=KbaarT1+hS9ie1VDaE7GuJpLXaPHtwC7k72Gwl+SIUzrYik1BQ2jHrrhRmMKgRJc7s 7mQVI3Fu41qDwm58lV8+8wlbX/bb2XNPVaAZcIQ7y5vSL6MVWPk6/rEsbEv8/n58XwEW xk/d2VL1Ym1gA+8HO45r2nf1Xn54Onz8Egp/G8fRVQifIG2j2YK6/1u8TbAgcwrZhy2h qk3rvWEvJV4Y0EkgSYMI0D3tA3iK306+8nD76ZqxE2b3YJQAmIiLj/q9/EotDNTdIcao J3nFTrBePUrUVsr0FwtzpaH2KcM5bo2dOrgvV6+CHhN7N/7MDUBOC2Nf4K4aNOCvL+2w y9tQ== 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=3EfTKelrBml41g/ema+MvDS6/lPSTh8Kboc33+T36t8=; b=ZcCJ6dSpvoQoATOxMZlzKg9qMDlIF5ByP/qSEE5h3VpZdM54VYFn76dQkiKqANZ/wj NJqKUE34zdcXVWLudKbnzf+I8rBZLIB+tEK8evrkq6w/rsDIMhKT28iEWRuyXOK0HsEf PH/vpRsLZ3UN7rqtKugQQh0AWAaPKZbl532fYutdLJIIG5JeSGsWpJR31lbS9Yd/Prfn 26qXBouv5VP0GIgN/IHwXDwRiFh/nO7UuOTgStyGOMTHw+fjUJcEamiAsNp0Ue+0MsZN IgYqzfa8Z6NW0lw8wEpkFXvyhFGd0dYgAzLKbHCpW4MD5jCgSXHtHXGh17CpqCMqoLak EklA== X-Gm-Message-State: ALyK8tJOy2VAV9InhruPvx0dgKSjjx58tHZTtGMfILVCISbf0LRqy2ziMPvd7elwRCEwUA== X-Received: by 10.107.198.204 with SMTP id w195mr8111951iof.4.1467208717284; Wed, 29 Jun 2016 06:58:37 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.40.14 with SMTP id m14ls11501698otb.50.gmail; Wed, 29 Jun 2016 06:58:36 -0700 (PDT) X-Received: by 10.176.65.36 with SMTP id j33mr3594434uad.2.1467208716394; Wed, 29 Jun 2016 06:58:36 -0700 (PDT) Original-Received: from mail-vk0-x229.google.com (mail-vk0-x229.google.com. [2607:f8b0:400c:c05::229]) by mx.google.com with ESMTPS id d13si1253683vke.244.2016.06.29.06.58.36 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 29 Jun 2016 06:58:36 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c05::229 as permitted sender) client-ip=2607:f8b0:400c:c05::229; Original-Received: by mail-vk0-x229.google.com with SMTP id m127so7348257vkb.3 for ; Wed, 29 Jun 2016 06:58:36 -0700 (PDT) X-Received: by 10.31.224.132 with SMTP id x126mr3269304vkg.39.1467208716112; Wed, 29 Jun 2016 06:58:36 -0700 (PDT) Original-Received: by 10.103.86.81 with HTTP; Wed, 29 Jun 2016 06:58:35 -0700 (PDT) In-Reply-To: <99925bbf-8c85-4274-8d30-2bc640ad3900@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400c:c05::229 as permitted sender) smtp.mailfrom=ville.voutilainen@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-Spam-Checked-In-Group: std-proposals@isocpp.org 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:26489 Archived-At: On 29 June 2016 at 16:28, Peter Koch Larsen wrote: > I often need to access the base-class, and this class is often templated. > This causes minor annoyances and is a maintenance problem. > > template > struct B {...}; > > template > struct D: B > { > using base = B; > ... > > }; > > I often encounter this problem when B and D are traits-classes, providing > information about the actual type T (where B and D might > contain information about the GUI-representation of T or how to transfer T > using a specific protocol). > > It would be nice if I could name the class e.g. like > template > struct D: base = B > { > // using base = B; Not needed anymore. > ... > > }; > > This solution looks nice to me syntax-wise, mimicking the using-directive, > and should be rather easy to implement. > > Has there been any proposals in this direction? See https://groups.google.com/a/isocpp.org/d/msg/std-proposals/zNvQQTKvoLQ/-5qMiIqvOP4J and https://groups.google.com/a/isocpp.org/d/msg/std-proposals/5MFmBEicqXY/ihmAgTCf7NYJ and http://open-std.org/JTC1/SC22/WG21/docs/papers/2014/n4225.html (the last of which is also https://cplusplus.github.io/EWG/ewg-closed.html#157) -- 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/CAFk2RUZVPLH_LCPG-nCqKh_Pmgcq1pO8YR_a4Pjv0joEY%3Df4tQ%40mail.gmail.com. .