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Conflicting Priorities in occam
SKIP guards and special hiding
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I wonder whether this is the way to specify SKIP guards: at first sight
it
seems to work for ALT:-
( (skip --> P) [] (skip -->Q) )\{skip} = P |~| Q
If you are more comfortable with occam, try something like
CHAN OF skip:
PAR
skip ! 1
ALT ALT
SKIP skip ? any
P = P
SKIP skip ? any
Q Q
------------------------------------------------------------------------
With the brand new version of hiding, this does not work for PRI ALT,
*but*
if I resurrect my old version of hiding -- call it "partial hiding",
perhaps -- then
( (skip --> P) [<] (skip -->Q) )\\{skip} = P
where \\ is "partial hiding"?
Just thinking out loud. Haven't checked any of this. Should be on the
road.
Adrian
--
Dr A E Lawrence (from home)