object.size() bug?

On 8/5/2005 8:39 AM, Roger D. Peng wrote:

Would it make sense for 'object.size()' to do the same thing for
external pointers as it does for environments?

I would think so.  For those who haven't looked, this returns the size
of the SEXP for the environment and its attributes, but does not attempt
to work out the size of the contents of the environment.  This makes
sense, because environments are references.  External pointers are also
references, so their object size should be the size of the pointer
(which is probably 28 bytes; R pointers carry a lot of baggage!), with
no attempt to say anything about the external thing they point to.

Duncan Murdoch

-roger

Martin Maechler wrote:

"Paul" == Paul Roebuck <roebuck at odin.mdacc.tmc.edu>
   on Thu, 4 Aug 2005 00:29:03 -0500 (CDT) writes:

    Paul> Can someone confirm the following as a problem:

Yes, I can.  No promiss for a fix in the very near future
though.

Martin Maechler, ETH Zurich

Can someone confirm the following as a problem:

R> setClass("Foo", representation(.handle = "externalptr"))
R> object.size(new("Foo"))
Error in object.size(new("Foo")) : object.size: unknown type 22
R> R.version.string
[1] "R version 2.1.1, 2005-06-20"

R-2.1.1/src/include/Rinternals.h
#define EXTPTRSXP   22    /* external pointer */

R-2.1.1/src/main/size.c:
objectsize(SEXP s) has no case for external pointers