220 4095 article Path: news.gmane.org!not-for-mail From: Hariharan Subramanian Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Default values in middle parameters in a function Date: Tue, 30 Apr 2013 11:02:40 +0530 Lines: 66 Approved: news@gmane.org Message-ID: References: <25d51458-9a2e-4607-9b1a-9d2a7be8df4e@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary=089e0158c76c79501f04db8d54a7 X-Trace: ger.gmane.org 1367299964 13397 80.91.229.3 (30 Apr 2013 05:32:44 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 30 Apr 2013 05:32:44 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBCJZFFHTQQIBB6NO7WFQKGQETZSA5YY@isocpp.org Tue Apr 30 07:32:44 2013 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-bk0-f72.google.com ([209.85.214.72]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1UX3BC-0001iu-9H for gclcip-std-proposals@m.gmane.org; Tue, 30 Apr 2013 07:32:42 +0200 Original-Received: by mail-bk0-f72.google.com with SMTP id ik5sf160197bkc.7 for ; Mon, 29 Apr 2013 22:32:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:x-beenthere:x-received:received-spf:mime-version :x-received:in-reply-to:references:date:message-id:subject:from:to :x-original-sender:x-original-authentication-results:reply-to :precedence:mailing-list:list-id:x-google-group-id:list-post :list-help:list-archive:list-subscribe:list-unsubscribe:content-type; bh=aEBP2fubQnPJ/l7BFp3rgobZ83XX2hWRnaGGImV1JLE=; b=KceqjO96PKXH1c5iKI1vCG0zXX6cubvhefYk1n+YuhcNw9TDWvtdQWoexCXkk68XZQ 6cJv9Osl3hSbKQDf6+lXL8zzVTKLwj9MiGAwlRXj9un2CyhJRBCrUgVaVpumjVPI5V5Y vRFrjogiOadZhSwPJPH0c6Fo0zLQjw18n1tzhfvv7qvlj8q3wxExfl7zYS9b73hYOzGY spNw/PJ2urSJc8/O88Nbr0sof0xyaB1CwRcHiu/xZizAMd3X0hzo41wdZs0xYvKooND7 /AChmuAXLdBvga2bmifWi988fk79XcsgX8CpzGkK6aDQrYDJzGgjpyZdQM92sDAG28Me X-Received: by 10.112.155.102 with SMTP id vv6mr11421618lbb.20.1367299961965; Mon, 29 Apr 2013 22:32:41 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.152.6.34 with SMTP id x2ls5460lax.106.gmail; Mon, 29 Apr 2013 22:32:41 -0700 (PDT) X-Received: by 10.112.147.170 with SMTP id tl10mr27760434lbb.100.1367299961103; Mon, 29 Apr 2013 22:32:41 -0700 (PDT) Original-Received: from mail-lb0-f172.google.com (mail-lb0-f172.google.com [209.85.217.172]) by mx.google.com with ESMTPS id sp4si745687lbb.206.2013.04.29.22.32.41 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 29 Apr 2013 22:32:41 -0700 (PDT) Received-SPF: pass (google.com: domain of tohari@gmail.com designates 209.85.217.172 as permitted sender) client-ip=209.85.217.172; Original-Received: by mail-lb0-f172.google.com with SMTP id o10so188599lbi.3 for ; Mon, 29 Apr 2013 22:32:41 -0700 (PDT) X-Received: by 10.152.29.227 with SMTP id n3mr164730lah.42.1367299960949; Mon, 29 Apr 2013 22:32:40 -0700 (PDT) Original-Received: by 10.112.33.177 with HTTP; Mon, 29 Apr 2013 22:32:40 -0700 (PDT) In-Reply-To: X-Original-Sender: tohari@gmail.com X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of tohari@gmail.com designates 209.85.217.172 as permitted sender) smtp.mail=tohari@gmail.com; dkim=pass header.i=@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:4095 Archived-At: --089e0158c76c79501f04db8d54a7 Content-Type: text/plain; charset=ISO-8859-1 > Default parameters can vary between translation units, which is > not good for code clarity. They can also cause address-of-function > problems and binary compatibility problems. An overload set is a > significantly better approach to the problems that default parameters > solve. I would rather the user wrote function overloads to handle > the various cases. Mostly, you can do this in an API-compatible > manner. So, rather than extend a flawed feature, I would rather say > "do not do that". > Default parameters are a reality and used extensively. Instead of making a "flawed feature" difficult to work with it makes this "flawed feature" easier to work with. -- --- 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. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/?hl=en. --089e0158c76c79501f04db8d54a7 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

=
Default parameters can vary between translat= ion units, which is
not good for code clarity. =A0They can also cause address-of-function
problems and binary compatibility problems. =A0An overload set is a
significantly better approach to the problems that default parameters
solve. =A0I would rather the user wrote function overloads to handle
the various cases. =A0Mostly, you can do this in an API-compatible
manner. =A0So, rather than extend a flawed feature, I would rather say
"do not do that".

Defau= lt parameters are a reality and used extensively. Instead of making a "= ;flawed feature" difficult to work with it makes this "flawed fea= ture" easier to work with.=A0

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