Displaying 1 result from an estimated 1 matches for "unbound_value".
2013 Aug 18
1
How does R_UnboundValue and removing variables work?
...ver in variable lookup. viz. the section of R
Internals "Hash tables" says "items are not actually deleted but have their
value set to R_UnboundValue.", which seems to align with what I read in
envir.c.
So, I reasoned, if I have a function that returns R_UnboundValue,
like so:
unbound_value <- function() .Call("unbound_value")
SEXP unbound_value() {
return R_UnboundValue;
}
then calling
x <- unbound_value()
ought to make "x" unbound. [spare me from saying this is a bad idea--I'm
just trying to understand what's going on.]
But it seems to only w...