I believe <if(rest(args))> will evaluate to true if args has more than one item.
Sam -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bill Andersen Sent: Wednesday, September 14, 2011 1:26 PM To: antlr-interest Subject: [antlr-interest] Need quick ANTLR/ST3 hack Folks I want to write a template containing a conditional expansion for a multi-valued attribute that does one thing if the attribute is singleton and another if there are more than 1 element For example, in an ANTLR grammar with ST output rule : FOO (bars+=bar)+ -> foo(args={$bars}) ; where the template looks like foo(args) ::= << <if(???)> something <else> something else <endif> >> I want some expression for ??? to test for args being singleton. Is this possible in ST3? Else I imagine I could write: rule : FOO (bars+=bar)+ -> foo(args={$bars},singleton={$bars.size() == 1}) ; and foo(args,singleton) ::= << <if(singleton)> something with args <else> something else with args <endif> >> ... but I would really rather not. List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address 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.
