[REBOL] Words with no value error
From: the::optimizer::tiscali::it at: 8-Jan-2004 18:03
Hi all,
I have menaged to read all the over 400 messages from this list sent
during last month... :P
I have a question about the " Script Error: xxx has no value" problem.
I have seen that there's no way to trap such an error, which is not a
syntax one.
'value? does not work, nor does 'error?.
But why 'try and 'throw-on-error do not as well? Aren't they thought to
trap this kind of dynamic errors?
It appears to be more a bug than a wanted feature.
Notice that a word can come as a parameter of a function and 'get can be
used on it. But there's no way to catch such an error, halting the script
execution. So using the features Rebol provides (such as data = code) can
result in a lethal error and cannot be used when the input has not been
previously checked (if such a check is ever possible).
Hope this is going to be fixed soon.
Mauro<
