220 26488 <99925bbf-8c85-4274-8d30-2bc640ad3900@isocpp.org> article Path: news.gmane.org!not-for-mail From: Peter Koch Larsen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Naming base-classes Date: Wed, 29 Jun 2016 06:28:38 -0700 (PDT) Lines: 91 Approved: news@gmane.org Message-ID: <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: multipart/mixed; boundary="----=_Part_45_358253090.1467206918504" X-Trace: ger.gmane.org 1467206922 19218 80.91.229.3 (29 Jun 2016 13:28:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Jun 2016 13:28:42 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDRIBXXKZQERBB42Z65QKGQEHQ5UI6Q@isocpp.org Wed Jun 29 15:28:41 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pf0-f199.google.com ([209.85.192.199]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bIFXl-0004Jq-8C for gclcip-std-proposals@m.gmane.org; Wed, 29 Jun 2016 15:28:41 +0200 Original-Received: by mail-pf0-f199.google.com with SMTP id g62sf100991319pfb.3 for ; Wed, 29 Jun 2016 06:28:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id: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=Ch9hmCJBY/GpBZ14m4UQYKWCFxVJCf/A+l1urdF7dKo=; b=uNfS/5WSjRbmUkrFH875xXwA9BZxbQKbO87C0FEFrXtcx7sRGZ6Dx3s2EX3c+pLGxm RuI9ka1w84iJC9dK2z12CC9IQ/WaTUMLqXMvNlhkwRIIjuuB2aevlvdvcbI/kKA1zKBI n15hUUZnhRI/fnlZlH0TsMhGzrd22poBrnviM1Loz7d/VWpWstKBvcuFQh9Um8oAfGNj EEwl6nMXiVx3S2bQvlStsfMSvk+Rixumq+DcdufoZdAAOKsZ6i+/GW+Giegec87kuRf5 TCQ0DrmJn0OMt0Oa7QtW3WP0qApxcOPH9up36ssNHpGTcATSYlpKhKXlBKo/ViJmtPiR +hdA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id: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=Ch9hmCJBY/GpBZ14m4UQYKWCFxVJCf/A+l1urdF7dKo=; b=MmsqW4ogWF0NRs0PVhGqexHLoW0nSqjILWXIHPXJ9Gy9EIXTTot9gGHPeGjEBMzvSZ Uqbh10SiEREOZlnxbV61ot33yTCSsQ2Y+vtIEbgCYULXbVFg+vE36Q/x/98iEoeg9Q1h 85j27+/0Uhul1CuZIdSqXsmVj40D3Cruy4pKLasba0VLSPwle50Xr+LEtRfyH3Jt4nM5 1pjHIgwdn+lhsjXp8EJ9am7Jm1I4J8fOIOXWLGKNkMml9lKYv/y2XrtT19NUU8WA8j87 i7aPr0aPiT9vw+qsSNfidAz5DheYylEcWHsHwxiqXzVPWpzUAAcpnfLLOuzdvtN64zlH zMjQ== 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: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=Ch9hmCJBY/GpBZ14m4UQYKWCFxVJCf/A+l1urdF7dKo=; b=Mhgn5psv2QFK+SmJ24XShzJLuYRPY4nbUJZojhaR4AYALZlde42W/hB/H1zJRdpBdV x0v0loB7Ad0hPMywTqljUHFJ4D0UxBXa1F+ytght+mbSvfypE+0gx4cNgxlltHYeT2Vl tgr1ZT+NiLQB0P+nmq0RYYjOsUTqolaEsLVAP+oC3WzJJqzdUGpYPLQHCywujJu9+mvg QzlvHLFsMmmO5O9GPPUjSMFtM9OFXq/R9OjTcff/qBlIgKTt6KZRw7cRVWHOq4y1Kei3 wajSzSCj0UoVpf7nc16UwWJFU2LaQibwO0aSl9yQ0GeZy6HNAe6A0Luxi7xogI3Y0Dy0 Ge9g== X-Gm-Message-State: ALyK8tIAxR6TMWZR8AqGMRxhyj8JZ7xsRKBpxrNxhDbtNdnqT7qCi/v8wLL5+FXj9ts+fA== X-Received: by 10.157.1.79 with SMTP id 73mr7747006otu.47.1467206920162; Wed, 29 Jun 2016 06:28:40 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.58.214 with SMTP id h205ls3417628ioa.22.gmail; Wed, 29 Jun 2016 06:28:39 -0700 (PDT) X-Received: by 10.36.1.15 with SMTP id 15mr82199itk.6.1467206919356; Wed, 29 Jun 2016 06:28:39 -0700 (PDT) X-Original-Sender: peter.koch.larsen@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:26488 Archived-At: ------=_Part_45_358253090.1467206918504 Content-Type: multipart/alternative; boundary="----=_Part_46_2103583560.1467206918504" ------=_Part_46_2103583560.1467206918504 Content-Type: text/plain; charset=UTF-8 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? Best regards Peter -- 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/99925bbf-8c85-4274-8d30-2bc640ad3900%40isocpp.org. ------=_Part_46_2103583560.1467206918504 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I often need to access the base-class, and this class= is often templated. This causes minor annoyances and is a maintenance prob= lem.

template <class T>
struct B {= ....};

template<class T>
struct D: = B<T>
{
=C2=A0=C2=A0=C2=A0 using base =3D B<T&g= t;;
...

};

I of= ten encounter this problem when B and D are traits-classes, providing infor= mation about the actual type T (where B and D might
contain infor= mation about the GUI-representation of T or how to transfer T using a speci= fic protocol).

It would be nice if I could name th= e class e.g. like
template<class T>
struct D= : base =3D B<T>
{
//=C2=A0=C2=A0=C2=A0 using base= =3D B<T>;=C2=A0 Not needed anymore.
...

};

This solution looks nice to me syntax-wi= se, mimicking the using-directive, and should be rather easy to implement.<= /div>

Has there been any proposals in this direction?

Best regards
Peter

--
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