Jim, thanks. To generalize then - tree grammars should 'track' the terminal/non-terminal structure (of interest) but exclude any cardinality specifiers.
On 05/03/2011 18:34, Jim Idle wrote: > You write expressions like that in the following way: > > expression > : ^(OR expression expression) > | term > ; > > term > : X > | Y > | Z > ; > > Then do not create the UPSILON as it will just mislead you. if you feel > you need it then add it to term, which although allowing ^(OR EPSILION > EPSILON) won't happen because you won't produce that tree. However, don't > generally make a token for something that isn't there. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
