490 

   490 

   491 

   491 

   492 

   492 

   493 

   493 

   494 // a problem with the parser 

   494 // a problem with the parser 

   495 val text = "(((((1)))))"

   496 val text = "(((((1)))))"

   496 val tokens = tokenizer(text)

   497 val tokens = tokenizer(text)

   497 println(tokens)

   498 println(tokens)

   498 val ast = Prog.parse_single(tokens)

   499 val ast = Prog.parse_single(tokens)

   499 println(ast)

   500 println(ast)

   504 

   505 

   505 val text = "((((1))))"

   506 val text = "((((1))))"

   506 val tokens = tokenizer(text)

   507 val tokens = tokenizer(text)

   507 println(tokens)

   508 println(tokens)

   508 Exp.parse(tokens)

   509 Exp.parse(tokens)