Astlib.Locationtype t = Ocaml_common.Location.t = {loc_start : Lexing.position;loc_end : Lexing.position;loc_ghost : bool;}module Error : sig ... endval set_input_lexbuf : Lexing.lexbuf option -> unitval none : tval register_error_of_exn : (exn -> Error.t option) -> unitexception Error of Error.tval raise_errorf : ?loc:t -> ('a, Format.formatter, unit, 'b) format4 -> 'aval report_exception : Format.formatter -> exn -> unit