1 2 grammar t058rewriteAST64; 3 options {language=JavaScript;output=AST;} 4 tokens {BLOCK;} 5 a : ID -> ID? ; // match an ID to optional ID 6 b : ID ; 7 ID : 'a'..'z'+ ; 8 WS : (' '|'\n') {$channel=HIDDEN;} ;
