1*16467b97STreehugger Robotgrammar t057autoAST42; 2*16467b97STreehugger Robotoptions {language=JavaScript;output=AST;} 3*16467b97STreehugger Robota returns [result] : x+=b! x+=b { 4*16467b97STreehugger Robot$result = "1st x="+$x[0].toStringTree()+','; 5*16467b97STreehugger Robot} ; 6*16467b97STreehugger Robotb : ID; 7*16467b97STreehugger RobotID : 'a'..'z'+ ; 8*16467b97STreehugger RobotINT : '0'..'9'+; 9*16467b97STreehugger RobotWS : (' '|'\n') {$channel=HIDDEN;} ; 10