220 27295 <0c6cb819-86d9-403f-8316-b303743b1814@isocpp.org> article Path: news.gmane.org!not-for-mail From: FrankHB1989 Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Generalized "using" member aliases. Date: Tue, 26 Jul 2016 18:56:38 -0700 (PDT) Lines: 109 Approved: news@gmane.org Message-ID: <0c6cb819-86d9-403f-8316-b303743b1814@isocpp.org> References: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_1794_252960846.1469584598580" X-Trace: ger.gmane.org 1469584602 13487 80.91.229.3 (27 Jul 2016 01:56:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 27 Jul 2016 01:56:42 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBCTJVBPG3QIBBV5J4C6AKGQEXWODODA@isocpp.org Wed Jul 27 03:56:41 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-io0-f197.google.com ([209.85.223.197]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1bSE5R-00085G-2d for gclcip-std-proposals@m.gmane.org; Wed, 27 Jul 2016 03:56:41 +0200 Original-Received: by mail-io0-f197.google.com with SMTP id g14sf21661546ioj.3 for ; Tue, 26 Jul 2016 18:56:40 -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: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=PZJxPCEOtqFbe4w4nNPwynyfOUL2XUm7XaAj9Wsg2/M=; b=SopywYKvX9G5Zm0pURuEvCUj5SQQvmekSB0Kp1yri2olK0iblxI5b6igXaeQuB5xc/ sMR97MSc7WQii0VHreQ7U+1175eSEU+V5FrXSCXnPI4V40iGPqsh8r8uMXGyrAuwTZ6V fZlkEg37uXTOHqlubbhcXAj6XUNxC5qyeUMPG0zG0t2J44ZGkoUdd2gXR86TmSXOExrF hHTACwChLKyHztATlWvGaUKvUMhlDPCpJuyxQdNWfFXdR33hocx2A4RJf9oRWcc3mc4c HM+hGVO4CPvEIJRXUi1mUlvuIQNUVpJcZ8e86Klsd5AiblzaI8W5DzVjh8hkuLDIxotF DaGg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; 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=PZJxPCEOtqFbe4w4nNPwynyfOUL2XUm7XaAj9Wsg2/M=; b=yPchCz6KY4SxhjU9VMLgkufjecKyCmCWXu6zP40J1LauPtonkd64Y38GNQwHrzJerD vxPUfDkcgWG4YbSQKRsIvGA4BFuQVxMJW9ZglUoWNcm6QhfpgXwmAi9s2+3fmzXnr3VW JbxIcMhk28xDWwzOi3cjIN2uf3Wjnjn2LKRY+ULwLmJRil6P2j0oQUt7TG1LVBz3DWbJ UL60xiT+H3FBfIQpAgVsMI8s0IV1KNXeUXlZREDA3yHVqVhoidBklYdLBJSSp3qnZ/Tn 6h8Sc+GB7yHbiEjVwZkEFXakbj8TOJaIfE3MrIz1K/MUzVOLJcq5uO0HM+PulCWAzNsj /IZA== 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=PZJxPCEOtqFbe4w4nNPwynyfOUL2XUm7XaAj9Wsg2/M=; b=k/CXXyXdyl7OTQ1T7LBHa6xzIMtFaaeyABYNov1PCKulsRjBHwou4ZYSOljnV+WZmy 9J0nVfCB0mUsPwSZ0vDxIFaNf31uKS+0h9r0zoacCvW2Bl1c61ZCjqa9c8a3mfKVoC+y IbSLAXL76q4FYBWKlbUx1SjIKGIKJQEGslzB+XZXrj3FQ8cmAFqehw7/nxdGkxjTvc+T A9c8iWwdTx49T+epcMMdJ/z72NP8M7Bs9CJcbdTXb/bbnZ3Jr11IGH6iR46qvQZySuFW RjVdLv6Lk8HmcYUo/gI5EAn+T1QwppghyyxOOccbcO8NyOM6ZZItTHNGp2KI9dToGjHk /N5w== X-Gm-Message-State: AEkooutKgw3PE4ZzPNcyVwfE7ZArysinQOL2vtmQoZzcbgM6ReXzsbBmikUsAQ1fIw+ROQ== X-Received: by 10.157.41.240 with SMTP id g45mr23205308otd.30.1469584600025; Tue, 26 Jul 2016 18:56:40 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.20.1 with SMTP id h1ls374300oth.44.gmail; Tue, 26 Jul 2016 18:56:39 -0700 (PDT) X-Received: by 10.157.56.205 with SMTP id k13mr1454646ote.10.1469584599108; Tue, 26 Jul 2016 18:56:39 -0700 (PDT) In-Reply-To: X-Original-Sender: frankhb1989@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:27295 Archived-At: ------=_Part_1794_252960846.1469584598580 Content-Type: multipart/alternative; boundary="----=_Part_1795_1915210899.1469584598580" ------=_Part_1795_1915210899.1469584598580 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable =E5=9C=A8 2016=E5=B9=B47=E6=9C=8823=E6=97=A5=E6=98=9F=E6=9C=9F=E5=85=AD UTC= +8=E4=B8=8A=E5=8D=881:58:55=EF=BC=8CGreg Marr=E5=86=99=E9=81=93=EF=BC=9A > > On Thursday, July 21, 2016 at 10:23:07 PM UTC-4, Derek Ross wrote: >> >> It would be useful if "using" aliases could be expanded beyond namespace= s=20 >> and types. Why not provide aliases for class members? This would be usef= ul=20 >> if you wanted to derive a class from a standard type such as pair or tup= le,=20 >> but wanted more meaningful member names than the built-in .first, .secon= d,=20 >> etc, names. In effect, a way to easily "rename" a member. >> > > There was a discussion of this here back in December. > > > https://groups.google.com/a/isocpp.org/forum/#!topic/std-proposals/4PR7LU= ngZFw > > https://groups.google.com/a/isocpp.org/forum/#!topic/std-proposals/KMI1F_= 0k55s > > The discussion seemed to be inactive for a long time. I actually prefer the broader idea: to allow users specifying a name in *an= y=20 *scope bounds to some entity, rather than only in some class scope. This=20 also eliminates some need of macros. --=20 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 e= mail 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/0c6cb819-86d9-403f-8316-b303743b1814%40isocpp.or= g. ------=_Part_1795_1915210899.1469584598580 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


=E5=9C=A8 2016=E5=B9=B47=E6=9C=8823=E6=97=A5=E6=98= =9F=E6=9C=9F=E5=85=AD UTC+8=E4=B8=8A=E5=8D=881:58:55=EF=BC=8CGreg Marr=E5= =86=99=E9=81=93=EF=BC=9A
On Thursday, July 21, 2016 at 10:23:07 PM UTC-4, Derek Ross wrot= e:
It would be usef= ul if "using" aliases could be expanded beyond namespaces and typ= es. Why not provide aliases for class members? This would be useful if you = wanted to derive a class from a standard type such as pair or tuple, but wa= nted more meaningful member names than the built-in .first, .second, etc, n= ames. In effect, a way to easily "rename" a member.

There was a discussion of this here back in De= cember.


The d= iscussion seemed to be inactive for a long time.

I actually prefer t= he broader idea: to allow users specifying a name in any scope bound= s to some entity, rather than only in some class scope. This also eliminate= s some need of macros.


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