220 5931 article Path: news.gmane.org!not-for-mail From: Ville Voutilainen Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Proposal: Mixins for C++ Date: Wed, 28 Aug 2013 15:12:53 +0300 Lines: 76 Approved: news@gmane.org Message-ID: References: <787081f7-fb40-4507-907d-259318ef2000@isocpp.org> <1c80b902-4e65-4f4b-a5d7-8953dbf6df05@isocpp.org> <7035c144-8350-40d4-bf23-03ab7aa7fe53@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=001a11c3d73cb24d7f04e500e8c9 X-Trace: ger.gmane.org 1377691976 8929 80.91.229.3 (28 Aug 2013 12:12:56 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 28 Aug 2013 12:12:56 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBC5JHI7A7ALRBROS66IAKGQES7HEZJY@isocpp.org Wed Aug 28 14:12:59 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-qa0-f72.google.com ([209.85.216.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1VEecJ-0000A4-0F for gclcip-std-proposals@m.gmane.org; Wed, 28 Aug 2013 14:12:55 +0200 Original-Received: by mail-qa0-f72.google.com with SMTP id i13sf3655930qae.11 for ; Wed, 28 Aug 2013 05:12:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:list-post:list-help:list-archive :list-subscribe:list-unsubscribe:content-type; bh=LFtXbmol6w3u1GiI24SC1K3txM7yxiqjSRteEESyLTQ=; b=vySC2hOulO4zW0m/8u+bWf0JcNcY6pXRJCzaPLCF/N+IGthA2P34LROodyGkyY3EY0 sAyuovrj9zKj+YWnJFtJy15jKKZsdPym4L7/WQVcKdXPUKeaz/9ZL+V0WwjBlGirZYri LHLMNZyzfF9tsamVIhabgyFCagZDeSy0Ug6B3LwBpFQhTJOqnEAJL+KHyD3/YI1j3k5D +WIvE39Wal4Lwn1w+UYCxdO0K6nOMg3KL+nuYGhBFSSnLX4F+CsWBIi8XVB+0bgMvhqs tq1zOMqQaYHDP+94szmkp0mUYkr/awSzjmoEho2BGX2Titw3V9agq/SFclKojxWXNxiK 2tfg== X-Received: by 10.58.151.4 with SMTP id um4mr1911704veb.18.1377691974129; Wed, 28 Aug 2013 05:12:54 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.49.0.41 with SMTP id 9ls312662qeb.15.gmail; Wed, 28 Aug 2013 05:12:53 -0700 (PDT) X-Received: by 10.224.166.74 with SMTP id l10mr592009qay.114.1377691973709; Wed, 28 Aug 2013 05:12:53 -0700 (PDT) Original-Received: from mail-qe0-x235.google.com (mail-qe0-x235.google.com [2607:f8b0:400d:c02::235]) by mx.google.com with ESMTPS id x4si7560390qar.125.1969.12.31.16.00.00 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 28 Aug 2013 05:12:53 -0700 (PDT) Received-SPF: pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c02::235 as permitted sender) client-ip=2607:f8b0:400d:c02::235; Original-Received: by mail-qe0-f53.google.com with SMTP id 1so3376762qee.12 for ; Wed, 28 Aug 2013 05:12:53 -0700 (PDT) X-Received: by 10.224.67.134 with SMTP id r6mr29221892qai.24.1377691973600; Wed, 28 Aug 2013 05:12:53 -0700 (PDT) Original-Received: by 10.224.195.8 with HTTP; Wed, 28 Aug 2013 05:12:53 -0700 (PDT) In-Reply-To: <7035c144-8350-40d4-bf23-03ab7aa7fe53@isocpp.org> X-Original-Sender: ville.voutilainen@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of ville.voutilainen@gmail.com designates 2607:f8b0:400d:c02::235 as permitted sender) smtp.mail=ville.voutilainen@gmail.com; dkim=pass header.i=@gmail.com; dmarc=pass (p=NONE dis=NONE) d=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: 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:5931 Archived-At: --001a11c3d73cb24d7f04e500e8c9 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 28 August 2013 15:02, R=F3bert D=E1vid wrote: > It's a pack of code. > >> >> > Soooo.. a macro? What's *wrong* with macros, besides the awkward > "generally good idea not to use them" argument? How about this macro-base= d > solution to the problem: > > Seriously? What's really wrong with macros is that they don't obey scopes, and error reporting when you make a mistake in a macro definition is rather dismal. Debugging macro-heavy code can also be rather frustratingly hard. The "generally good idea not to use them" is not just a random statement, it's based on the downsides of macros, and it's not just grandstanding from the top of a high horse. --=20 ---=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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposa= ls/. --001a11c3d73cb24d7f04e500e8c9 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable



On 28 August 2013 15:02, R=F3bert D=E1vid <lrdxgm@gmail.com>= wrote:
It's a pack of code.


Soooo.. a macro? What's wrong= with macros, besides the awkward "generally good idea not to use them= " argument? How about this macro-based solution to the problem:


Seriously? What's real= ly wrong with macros is that they don't obey scopes, and error reportin= g when you make a mistake
in a macro definition is rather dismal. Debugg= ing macro-heavy code can also be rather frustratingly hard. The
"generally good idea not to use them" is not just a ra= ndom statement, it's based on the downsides of macros,
and it's = not just grandstanding from the top of a high horse.

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