[Rd] S4 classes and C

Ross Boylan ross at biostat.ucsf.edu
Fri May 19 19:23:19 CEST 2006

On Fri, 2006-05-19 at 11:46 +0200, Martin Maechler wrote:
> >>>>> "Seth" == Seth Falcon <sfalcon at fhcrc.org>
> >>>>>     on Thu, 18 May 2006 12:22:36 -0700 writes:
>     Seth> Ross Boylan <ross at biostat.ucsf.edu> writes:
>     >> Is there any good source of information on how S4 classes (and methods)
>     >> work from C?
> Hmm, yes; there's nothing in the "Writing R Extensions" manual,
> and there's not so much in the ``The Green Book''
> (Chambers 1998), which is prominently cited by Doug Bates (and Saikat Debroy)
> in the paper given at DSC 2003 (mentioned earlier in this
> thread, http://www.ci.tuwien.ac.at/Conferences/DSC-2003/Drafts/BatesDebRoy.pdf )

Particularly relevant is Appendix A.6 of the Green book.  The index
isn't particularly helpful finding it.  Of course, Appendix A can't
answer the question of how the R implementation might differ.

For example, A.6 discusses GET_SLOT_OFFSET, which does not appear to be
available in R.

Thanks for the pointers.

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