1*16467b97STreehugger Robotgrammar t057autoAST40; 2*16467b97STreehugger Robotoptions {language=JavaScript;output=AST;} 3*16467b97STreehugger Robota returns [result]: x+=b x+=b { 4*16467b97STreehugger Robott=$x[1] 5*16467b97STreehugger Robot$result = "2nd x="+t.toStringTree()+','; 6*16467b97STreehugger Robot}; 7*16467b97STreehugger Robotb : ID; 8*16467b97STreehugger RobotID : 'a'..'z'+ ; 9*16467b97STreehugger RobotINT : '0'..'9'+; 10*16467b97STreehugger RobotWS : (' '|'\n') {$channel=HIDDEN;} ; 11