type t = Ocaml_common.Location.errorval createf :
loc:Location.t ->
('a, Caml.Format.formatter, Base.Unit.t, t) Pervasives.format4 ->
'aval message : t -> Base.String.tval set_message : t -> Base.String.t -> tval register_error_of_exn : (Base.Exn.t -> t Base.Option.t) -> Base.Unit.tRegister an exception handler. Exception registered this way will be properly displayed by report_exception.
val of_exn : Base.Exn.t -> t Base.Option.tval to_extension :
t ->
string Location.loc * Migrate_parsetree.Ast_404.Parsetree.payloadConvert an error to an extension point. The compiler recognizes this and displays the error properly.