OpenEuphoria

RE: exception handler

• Posted by Robert Craig <rds at RapidEuphoria.com> Aug 26, 2004
• 403 views

For the global exception handler, I really
don't want to support the resumption of the program
from the point where the error occured.

I have numerous optimizations in the Translator,
and a couple in the interpreter, that would be ruined 
by this. It would mean the normal program control flow 
could be broken at any moment. The Translator
could not make the very basic assumption that a 
statement will be executed after the preceding statement,
without the possibility that all kinds of stuff 
will suddenly change due to an exception, 
e.g. global variable values.
I can handle jumping into a crash routine, but not
returning to the point of the exception and 
continuing. It would be too unreliable. 

Even with all optimizations turned off, I suspect
the program would have difficulty in most cases
trying to continue, e.g. if there was an uninitialized
variable, a subscript out of bounds, etc. In most cases
it doesn't seem likely that your handler would be able 
to come up with a good variable value that would let your 
program continue safely and productively.

Regards,
   Rob Craig
   Rapid Deployment Software
   http://www.RapidEuphoria.com