[R] Only referenc copy when calling C routine?

[Duncan Murdoch]

On Sun, 11 Apr 2004 21:43:58 -0400, you wrote:

>For me it's just a matter of getting my hands dirty, I guess.  For whatever
>reason I seem to have a mental block about the PROTECT/UNPROTECT business...

Just protect every SEXP until you don't care if it goes away.  It
might be possible to skip some PROTECT calls, but PROTECT is fairly
cheap, and debugging a missing PROTECT is not!  

Duncan Murdoch