-- | Collect all terminal symbols from a set of rules.
--
-- TODO move to FormalGrammars library
--
-- TODO i guess, this collects multidim stuff for now!!!

collectTerminals :: S.Set Rule -> S.Set Symbol
collectTerminals = error "collectTerminals"
collectTerminals :: S.Set Rule -> S.Set Symbol
collectTerminals = error "collectTerminals"
collectTerminals = error "collectTerminals"