public override void DiscoverRule(RuleAST rule, GrammarAST ID, IList<GrammarAST> modifiers, ActionAST arg, ActionAST returns, GrammarAST thrws, GrammarAST options, ActionAST locals, IList<GrammarAST> actions, GrammarAST block) { // TODO: chk that all or no alts have "# label" CheckInvalidRuleDef(ID.Token); }