Library.Cval ident_start : (char, char, BatCharParser.position) BatParserCo.tval ident_letter : (char, char, BatCharParser.position) BatParserCo.tval op_start : (char, char, BatCharParser.position) BatParserCo.tval op_letter : (char, char, BatCharParser.position) BatParserCo.t