From owner-sc22wg5@open-std.org Fri Jul 30 17:58:39 2010 Return-Path: X-Original-To: sc22wg5-dom8 Delivered-To: sc22wg5-dom8@www2.open-std.org Received: by www2.open-std.org (Postfix, from userid 521) id 5846FC3BA11; Fri, 30 Jul 2010 17:58:39 +0200 (CEST) X-Original-To: sc22wg5@open-std.org Delivered-To: sc22wg5@open-std.org X-Greylist: delayed 1173 seconds by postgrey-1.18 at www2.open-std.org; Fri, 30 Jul 2010 17:58:38 CEST Received: from smtp.cims.nyu.edu (SMTP.CIMS.NYU.EDU [128.122.80.9]) by www2.open-std.org (Postfix) with ESMTP id 81B94C3BA0E for ; Fri, 30 Jul 2010 17:58:38 +0200 (CEST) Received: from [192.168.0.100] (cpe-69-76-186-24.kc.res.rr.com [69.76.186.24] (may be forged)) (authenticated bits=0) by smtp.cims.nyu.edu (8.14.3/8.13.8) with ESMTP id o6UFd12x019076 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 30 Jul 2010 11:39:02 -0400 (EDT) Message-ID: <4C52F218.6010706@courant.nyu.edu> Date: Fri, 30 Jul 2010 08:39:04 -0700 From: Aleksandar Donev User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: J3 , SC22WG5 Subject: Re: (j3.2006) (SC22WG5.4305) Executing a type-bound procedure on a coindexed object References: <20100729154103.E2BD3C3BA01@www2.open-std.org> <4C51AC7D.2000805@lrz.de> In-Reply-To: <4C51AC7D.2000805@lrz.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-sc22wg5@open-std.org Precedence: bulk Reinhold Bader wrote: > This does not seem to make sense. The case you mention can also happen > in a non-polymorphic scenario, but there are no restrictions there. Which is a hint that the size of the allocatable components is not the issue. There are restrictions to ensure that the sizes match so that remote reallocation never happens. The issue, as I recall, was that there could be other components of unknown types, shapes, etc. In a heterogeneous environment, copying such things may be harder than just getting an integer size of an allocatable array. In general, it is likely it is all implementable even without some of the restrictions, but someone asked to add a restriction to facilitate implementation, and we listened unless it took away what was seen as a critical functionality. Polymorphic coarrays were not in general seen as "critical" :-) Best, Aleks -- Aleksandar Donev Assistant Professor of Mathematics Courant Institute of Mathematical Sciences, New York University E-mail: donev@courant.nyu.edu Phone: (510) 910-0891 Address: 251 Mercer St, New York, NY 10012 Web: http://cims.nyu.edu/~donev/