David,
On Jul 21, 2009, at 13:00 , David Scherrer wrote:
I'm wondering if there is a way to define a destructor function (to
free memory) for S4 class objects in analogy to C++?
The analogy doesn't work, because in C++ you have pass-by-reference
semantics, but in R you have pass-by-value. Hence in R there is no
"one" object that you could finalize - there may be dozens of copies
of your S4 object, so which one would you finalize? However, you can
register a finalizer for reference-semantics objects (if that's what
you really have), see ?reg.finalizer (and on C level
R_Register*Finalizer* functions).
Cheers,
Simon
rm() combined with gc() does not seem to be a good idea (Chambers,
2008).
So could it be done on the C/C++ level or is it even already
available in
the "internals"?
Many thanks,
David
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