220 24888 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: Wed, 2 Mar 2016 16:50:51 -0800 (PST) Lines: 80 Approved: news@gmane.org Message-ID: References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_138_1660235006.1456966251605" X-Trace: ger.gmane.org 1456966263 12806 80.91.229.3 (3 Mar 2016 00:51:03 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 3 Mar 2016 00:51:03 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDFLZXWOVYIBB3EU323AKGQEJMGFHTQ@isocpp.org Thu Mar 03 01:50:56 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ob0-f198.google.com ([209.85.214.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1abHTi-0006GZ-GQ for gclcip-std-proposals@m.gmane.org; Thu, 03 Mar 2016 01:50:54 +0100 Original-Received: by mail-ob0-f198.google.com with SMTP id rt7sf6824417obb.0 for ; Wed, 02 Mar 2016 16:50:54 -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 :list-subscribe:list-unsubscribe; bh=7lFnISRg4pHTlnooI60ZZ1XK0bCKzn1XMt7MOOUV/wM=; b=Ww9UgduAgcxxBTwLeSxsrurJDKpEQKprmRsjFt3kERbus0+vqixOBmPHc65fAikwK4 wfvPjHBuwpudsUvK7bPCKzDmC6prdp3jb+rHsQoY+o8HPt2jdm+knsbtdcCgLj0RnPRv jdd/pklRe6P4ayqUhT3aK22VXWuiVRYZB5BeCNYYHnRXrWppQxpDmuVNp+7ixPnhqciB 7rlWNP1F0awayJYBInHvtexiX1OKcOZi3MgWtTeWI4xhzvxjBH3XxYxUI4yF2xfitxjW easbFZdGzTL0ptYrBdWie6aYG1CbppHgwgWltw6uU2CV2pp4kn2Jy8skdIL59IUTNpl9 3c+Q== 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:list-subscribe:list-unsubscribe; bh=7lFnISRg4pHTlnooI60ZZ1XK0bCKzn1XMt7MOOUV/wM=; b=IDDuNGlMXRMqZTJERZTj+oQnYkP0Q+AcdzqbYGpbKlu0zCmNo+BF5TDG0ERknzwusw nLZ7xMgjCR18ge7SLOFVlyFbwy7Fc05sN6rD8era1LuNehMqExQxi8KijKJMjeCdLYwl wtOHgNALKGvXjkGpMT1Ikgs07ns6z4z+ba64IPV2uetz+CHw1dDyMhyLQEwzb7hpxH2A erqskHVqWPPruV1oFnx0FhJkVt/ZuQ6qM2CXOcXyguAAOXfAL4vn6+0sn4bNV4Dxsw1h JZIAnt1MLqPXLdgiCEnhZkTY6/8PHRfaSMSYykVf+wK8IMMJGNDCF2NzXczo/Qr8Riv8 zPCg== X-Gm-Message-State: AD7BkJJGvoGRtrYGMUPa+RC0ohE3Is0P+rcgN7MuI4B9qv2nevaP0/LZxTDdR0NQXfcIIQ== X-Received: by 10.107.6.163 with SMTP id f35mr207872ioi.25.1456966253462; Wed, 02 Mar 2016 16:50:53 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.162.211 with SMTP id l202ls1144266ioe.73.gmail; Wed, 02 Mar 2016 16:50:52 -0800 (PST) X-Received: by 10.50.110.41 with SMTP id hx9mr5730igb.2.1456966252550; Wed, 02 Mar 2016 16:50:52 -0800 (PST) In-Reply-To: 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: List-Subscribe: , List-Unsubscribe: , X-Original-From: Walt Karas Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:24888 Archived-At: ------=_Part_138_1660235006.1456966251605 Content-Type: multipart/alternative; boundary="----=_Part_139_1230542507.1456966251605" ------=_Part_139_1230542507.1456966251605 Content-Type: text/plain; charset=UTF-8 On second thought, Components should be an implicitly defined (public) member class template of every class. This makes more sense, since it needs member access to the class. template < template class Op, typename Param> struct Components { bool operator () (Param ¶m) { ... } }; Default operator == changes to: template bool operator == (const Target &op1, const Target &op2) { Equality_param param(op1, op2); typename Target::template Components::template Op, Equality_param > c; return(c(param)); } -- 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/fccab40e-bfe8-49e0-ad12-2a2ac28b28a6%40isocpp.org. ------=_Part_139_1230542507.1456966251605 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
On second thought, Components should be an implicitly defi= ned (public) member class template of every class.=C2=A0 This makes more se= nse, since it needs member access to the class.

template <
=C2= =A0 template <typename Member_type, Member_type A::*mptr> class Op,=C2=A0 typename Param>
struct Components
=C2=A0 {
=C2=A0=C2= =A0=C2=A0 bool operator () (Param &param)
=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 {
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ...
=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 }
=C2=A0 };

Default operator =3D=3D changes to:

tem= plate <class Target>
bool operator =3D=3D (const Target &op1, = const Target &op2)
=C2=A0 {
=C2=A0=C2=A0=C2=A0 Equality_param<= Target> param(op1, op2);

=C2=A0=C2=A0=C2=A0 typename Target::temp= late
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Components<Equality_op<Target&= gt;::template Op, Equality_param<Target> > c;

=C2=A0=C2=A0= =C2=A0 return(c(param));
=C2=A0 }

--
You received this message because you are subscribed to the Google Groups &= quot;ISO C++ Standard - Future Proposals" group.
To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+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/fccab40e-bfe8-49e0-ad12-2a2ac28b28a6= %40isocpp.org.
------=_Part_139_1230542507.1456966251605-- ------=_Part_138_1660235006.1456966251605-- .