RE: Cancel & Condition Handlers (was: File update after abnormal program termination)

> From: bmorris@ca.ibm.com
>
> It can bedangerous to handle conditions with an ILE condition handler,
because
> it causes the failing procedure to continue at the next MI instruction
rather
> than the next HLL instruction.

I remember running into this when I was learning condition handlers.  What I
would REALLY like is an option to retry an operation, but again it would
have to be at the HLL level.  For example, a nice generic condition handler
would be to notice that you're missing a library in your library list (on
either a program call or a database file open).  In that case, the condition
handler could add the library and then tell the HLL to retry the operation.
This would allow some very elegant error handling.  However, it would
require some serious intrusion into the compiler - you'd have to be able to
"mark" HLL retry boundaries, and allow a completion method from the
condition handler to restart execution at that mark.  It's not impossible,
but it would definitely require some serious thought.

Joe