220 25062 article Path: news.gmane.org!not-for-mail From: "'Walt Karas' via ISO C++ Standard - Future Proposals" Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: "Components" template with implicitly defined partial specializations for all classes Date: Tue, 8 Mar 2016 09:40:22 -0800 (PST) Lines: 88 Approved: news@gmane.org Message-ID: References: <56D9E17F.2070202@wanadoo.fr> <2b0bcca0-0939-49f7-939b-4d688f8dfe34@isocpp.org> <324dbff9-84da-46f2-b2f3-3d9fe0cc2082@isocpp.org> <56DA88DF.90000@wanadoo.fr> <7e46c46d-2e18-4cec-92c1-4f4d7fbc786b@isocpp.org> <39bbeb02-62b8-497b-8d65-5780a6baca97@isocpp.org> <05ac78e7-3d30-4a99-ad0f-a3d29497e2ff@isocpp.org> <2c7cb187-ad83-4ceb-af8b-1e61d4fb4d0d@isocpp.org> <56DD28C8.7020708@wanadoo.fr> <840b1f9a-be05-4454-b20d-99e2ccb3c1f1@isocpp.org> <390f2de7-6ab3-47cc-b76c-a7454dec5fc5@isocpp.org> <741522c6-22f7-441d-81ab-e1ca44e085dc@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_4968_55014460.1457458822262" X-Trace: ger.gmane.org 1457458837 27152 80.91.229.3 (8 Mar 2016 17:40:37 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 8 Mar 2016 17:40:37 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDFLZXWOVYIBBB457S3AKGQEA26BABQ@isocpp.org Tue Mar 08 18:40:26 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qk0-f198.google.com ([209.85.220.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1adLcO-0000uK-WE for gclcip-std-proposals@m.gmane.org; Tue, 08 Mar 2016 18:40:25 +0100 Original-Received: by mail-qk0-f198.google.com with SMTP id u128sf30648706qkh.0 for ; Tue, 08 Mar 2016 09:40:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:in-reply-to:references:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive:sender :list-subscribe:list-unsubscribe; bh=0mHbywNpKw4SR9ODsBTfMXvbzgqLkpVk1CpT/WEVstI=; b=QPuxAX3VikNdcoPIrloniaBqSrVdOfHckS04k0jE2xSsoShGDpS/WWY9z1jcrG9X6L 97/OINDlSGqgL7VIwSVT//oTqswpc30/bG3f+pNk0Y7XfYU3hWBBlqBDuo94XICT3/xt 64Qhina6iwTJlO1ehpomEsAJUkwvrwQa3ij/ZdYxWzGVhnLD9NmrewLGAMDnyAkqmWmu wWTYEyiDh+juwcmGQXD+5XzeEBnb3XLY4+QayEaCxfAWnJik8aMPx1r3EUulBqgyKkzO sY7zfF/GfGxux9BuWvVwZ0KUK1mvV7FGp5juG5J4DzyH+pq+XtqBAtNnk91BTUWf+QfI JqPA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:in-reply-to:references :subject:mime-version:x-original-sender:reply-to:precedence :mailing-list:list-id:x-spam-checked-in-group:list-post:list-help :list-archive:sender:list-subscribe:list-unsubscribe; bh=0mHbywNpKw4SR9ODsBTfMXvbzgqLkpVk1CpT/WEVstI=; b=YryUJYUfMR+XGO+uOLt20f2GKeAPgNSiupkpS4YclmdToqy+vgFeyorKRmdUu+ewVf XCJNFseOM3in1gPBltWm21CeOwcRE0I3maWbVdt5d+E64ZlnC7aCMuSOfOQAVMXTWu6f Gyx9ExlZcT/9hri7XL70j3+muvg9fk1egsK3+y1RU8/6RD6UgN9hETwIaCIIJ4Buopr5 OU8TWselCE41enGhXpjX23v8Mx+EKrZTa+r7E8wwJFduJPWFJ2javE8tq8/QPuNyWWoR FZyBN6IL6BWuPjHiwt5I/yFZS8mYb0fXYNV8PgCQORrcoTZvFUr3j25zd6T2Q2+HKiQP MOaQ== X-Gm-Message-State: AD7BkJK1n9MqyX3HjlpBxEEIZGPHkX7y8HPe8hbCb82t7YJ9G2049xY4pA3ZUixzwLd/sw== X-Received: by 10.129.108.3 with SMTP id h3mr456500ywc.31.1457458824240; Tue, 08 Mar 2016 09:40:24 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.27.211 with SMTP id b202ls291434iob.102.gmail; Tue, 08 Mar 2016 09:40:23 -0800 (PST) X-Received: by 10.50.142.39 with SMTP id rt7mr359682igb.8.1457458823234; Tue, 08 Mar 2016 09:40:23 -0800 (PST) In-Reply-To: <741522c6-22f7-441d-81ab-e1ca44e085dc@isocpp.org> X-Original-Sender: wkaras@yahoo.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: Original-Sender: std-proposals@isocpp.org List-Subscribe: , List-Unsubscribe: , X-Original-From: Walt Karas Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:25062 Archived-At: ------=_Part_4968_55014460.1457458822262 Content-Type: multipart/alternative; boundary="----=_Part_4969_1608318564.1457458822263" ------=_Part_4969_1608318564.1457458822263 Content-Type: text/plain; charset=UTF-8 On Tuesday, March 8, 2016 at 11:31:07 AM UTC-5, Cleiton Santoia wrote > > > >> Since you mention an is_base predicate, I assume that means you have some >> sort of member pointer to a base class, but I see no explicit discussion of >> that. >> > > Sorry, I did not get this, why you need a member pointer to a base class ? > > struct X{ > }; > > struct Y : X { > X* base; > }; > > you mean this ??? > I meant that, if reflection were to be used to provide general default comparison operators, it would have to be able to "reflect upon" base classes as well as (other) data members. -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. 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On Tuesday, March 8, 2016 at 11:31:07 AM UTC-5, Cl= eiton Santoia wrote
=C2=A0=
Since y= ou mention an is_base predicate, I assume that means you have some sort of = member pointer to a base class, but I see no explicit discussion of that. <= br>

Sorry, I did not get this, = why you need a member pointer to a base class ?=C2=A0

<= div>
stru= ct X{
};

st= ruct Y = : X {
=C2=A0 =C2=A0X* base;
};

you mean this ???

I meant that, if reflection were to be used to provide gene= ral default comparison operators, it would have to be able to "reflect= upon" base classes as well as (other) data members.

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