`sig val comment_delimiters : (string * string) option val line_comment_start : string option val nested_comments : bool val ident_start : (char, char, BatCharParser.position) BatParserCo.t val ident_letter : (char, char, BatCharParser.position) BatParserCo.t val op_start : (char, char, BatCharParser.position) BatParserCo.t val op_letter : (char, char, BatCharParser.position) BatParserCo.t val reserved_names : string list val case_sensitive : bool end`