It does occur to me that by simply adding an instruction that checked
to see if the "str" register was a NULL pointer or not would suffice
for your needs.
That's what I was thinking, perhaps an `exist' function? %{exist(foo)}
I think you mean %(exist{foo}), but yeah. I was thinking that we would
want a more generic function to check to see if str == NULL ... but thinking
more about it, that's really an artifact of the current implementation.
%(exist) (and %(notexist)) would be better for the long run.
--Ken
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