Boolean sets

[Nicholas Crosbie]

I would like to set a a Bison project which processes
a an expresssion of the form

gate = r3 AND r5 NOT (r5 OR r7)

i.e. a Boolean expression of arbitrary
length/complexity, where r3, r5 etc. are
variables containing integer data (e.g. an array, or
stored as a set or list).
My prefered option would is to have Bison do the
parsing and call Objective
C or C++ code for set intersection, set union, set
minus.  Alternatively, I could
have Bison call C functions for set intersection etc. 


Does anyone have any experience with such a
task.....can point me to example
code?

Nick

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