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Dave wrote:
That's more interesting to me, so programs CAN be called recursively?
Oh, yes, of course they can.
In our own QuestView application: it's possible to create objects called
VIEW Programs, that launch QuestView with preset, locked parameters (as
opposed to the VIEWCPP program, the CPP for the VIEW command, which
launches it in ad-hoc mode). And it's possible for VIEW programs to
include calls to other VIEW programs (or to HLL programs written to our
exit spec, or for HLL programs to call VIEW programs). Bottom line: when
a VIEW program calls another VIEW program, what really happens is an
indirect recursive call from one instance of QuestView to a second
instance, and in a fairly complex QuestView application (e.g., the demo
suite we supply), you could easily have as many as four or five copies
of QuestView on the call stack.
Back in the days of CISC AS/400s, we even supplied a utility that would
re-encapsulate an OPM RPG program to make it recursive. We stopped
bundling the utility after it stopped working.
--
JHHL
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