`sig
type invalid_package_type =
Parameterized_types
| Constrained_types
| Private_types
| Not_with_type
| Neither_identifier_nor_with_type
type error =
Unclosed of Location.t * string * Location.t * string
| Expecting of Location.t * string
| Not_expecting of Location.t * string
| Applicative_path of Location.t
| Variable_in_scope of Location.t * string
| Other of Location.t
| Ill_formed_ast of Location.t * string
| Invalid_package_type of Location.t * Syntaxerr.invalid_package_type
| Removed_string_set of Location.t
exception Error of Syntaxerr.error
exception Escape_error
val location_of_error : Syntaxerr.error -> Location.t
val ill_formed_ast : Location.t -> string -> 'a
end`