47 !PPCStarCharSetPredicateNode methodsFor:'first follow next'!

    48 

    49 firstSets: aFirstDictionary into: aSet suchThat: aBlock

    50     "

    51         First and follow should be performed on the non-specialized tree, i.e. on a tree

    52         with star -> messageNode. Not on myself.

    53         

    54         The reason for that is, that:

    55         - I am terminal

    56         - I am nullable

    57         

    58         This means, I look like epsilon node for the first follow analysis. And epsilons 

    59         are ignored in sequences, thus sequence of StarMessagePredicate, Literal

    60         leads to { Literal } as firstSet and not expected { MessagePredicate, Literal }

    61     "

    62     ^ self error: 'Cannot perform first/follow analysis on myself, sorry for that :('

    63 ! !

    64