1 2grammar t058rewriteAST13; 3options {language=JavaScript;output=AST;} 4tokens {DUH;} 5a : ID INT ID INT -> ^( DUH ID ^( DUH INT) )+ ; 6ID : 'a'..'z'+ ; 7INT : '0'..'9'+; 8WS : (' '|'\n') {$channel=HIDDEN;} ;