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From: Aleksandar Donev <donev1@llnl.gov>
Organization: LLNL
To: "WG5, " <sc22wg5@open-std.org>
Subject: Re: (j3.2006) (SC22WG5.3767)   Response on the TR29113 draft N1761
Date: Mon, 8 Dec 2008 10:59:47 -0800
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On Monday 08 December 2008 10:55, Reinhold Bader wrote:
> =A0 =A0Could one not apply the same argument to C_LOC() itself? Why was
> =A0 =A0a polymorphic argument to C_LOC() disallowed?
Because, the way "handles" were envisioned is that you take a=20
non-interoperable object, do C_LOC to get a handle, and then do=20
C_F_POINTER later to get back to the object. You can allow a=20
polymorphic or an object with type-parameters, but then the handle is=20
incomplete (only has an address but no type info), and so it is not=20
possible to reconstruct the object from the handle later. So the=20
feature would be useless and only a source of bugs. If you can think of=20
a good use, do speak up :-)
Best,
Aleks

=2D-=20
Aleksandar Donev, Ph.D.
Lawrence Postdoctoral Fellow @ Lawrence Livermore National Laboratory
High Performance Computational Materials Science and Chemistry
E-mail: donev1@llnl.gov
Phone: (925) 424-6816  Fax: (925) 423-0785
Address: P.O.Box 808, L-367, Livermore, CA 94551-9900
Web: http://cherrypit.princeton.edu/donev