[REBOL] Re: Function Context Query
From: rotenca:telvia:it at: 4-Dec-2001 16:54
> surely it would be just as easy to test whether local words or refinements
are set, ie with the function Unset? as >opposed to none?.
Mine is only an idea, i'm not sure this is the true reason, but a none value
can be used directly in expression like:
if ref [...]
either ref 
An unset value would generate an error in these cases.
Unset? can't be used with an unset word (the evaluation of the word gives an
error), you must use:
unset? get/any lit-word
As you can see it is not the first thing one could try :-)