1 grammar t057autoAST40; 2 options {language=JavaScript;output=AST;} 3 a returns [result]: x+=b x+=b { 4 t=$x[1] 5 $result = "2nd x="+t.toStringTree()+','; 6 }; 7 b : ID; 8 ID : 'a'..'z'+ ; 9 INT : '0'..'9'+; 10 WS : (' '|'\n') {$channel=HIDDEN;} ; 11
