[Rd] .Call ref card

Terry Therneau therneau at mayo.edu
Tue Mar 27 18:03:49 CEST 2012

On 03/23/2012 10:58 AM, Simon Urbanek wrote:
> This is my shot at a cheat sheet.
> comments are welcome.
> Simon
I was looking through the cheat sheet.  It's nice.  There are a few 
things in it that I can't find in the documentation though.  Where would 
one find a description?  (I can guess, but that may be dangerous).

R_Naint   (I don't see quite how this differs from using NA_INTEGER to 
set a result)
R_PreserveObject, R_ReleaseObject   (Advantages/disadvantages wrt PRESERVE?)

The last is the most interesting to me.

Terry T.

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