`sig
type 'a t = 'a Hash_set.Poly.t
type 'a elt = 'a
val create :
('a, unit -> 'a t) Hash_set_intf.create_options_without_hashable
val of_list :
('a, 'a elt list -> 'a t) Hash_set_intf.create_options_without_hashable
val length : 'a t -> int
val is_empty : 'a t -> bool
val iter : 'a t -> f:('a elt -> unit) -> unit
val fold : 'a t -> init:'accum -> f:('accum -> 'a elt -> 'accum) -> 'accum
val exists : 'a t -> f:('a elt -> bool) -> bool
val for_all : 'a t -> f:('a elt -> bool) -> bool
val count : 'a t -> f:('a elt -> bool) -> int
val sum :
(module Commutative_group.S with type t = 'sum) ->
'a t -> f:('a elt -> 'sum) -> 'sum
val find : 'a t -> f:('a elt -> bool) -> 'a elt option
val find_map : 'a t -> f:('a elt -> 'b option) -> 'b option
val to_list : 'a t -> 'a elt list
val to_array : 'a t -> 'a elt array
val min_elt : 'a t -> cmp:('a elt -> 'a elt -> int) -> 'a elt option
val max_elt : 'a t -> cmp:('a elt -> 'a elt -> int) -> 'a elt option
val mem : 'a t -> 'a -> bool
val copy : 'a t -> 'a t
val add : 'a t -> 'a -> unit
val strict_add : 'a t -> 'a -> unit Or_error.t
val strict_add_exn : 'a t -> 'a -> unit
val remove : 'a t -> 'a -> unit
val strict_remove : 'a t -> 'a -> unit Or_error.t
val strict_remove_exn : 'a t -> 'a -> unit
val clear : 'a t -> unit
val equal : 'a t -> 'a t -> bool
val filter : 'a t -> f:('a -> bool) -> 'a t
val diff : 'a t -> 'a t -> 'a t
val of_hashtbl_keys : ('a, 'b) Core_hashtbl.t -> 'a t
val filter_inplace : 'a t -> f:('a -> bool) -> unit
val t_of_sexp :
(Sexplib.Sexp.t -> 'a) -> Sexplib.Sexp.t -> 'a Hash_set.Poly.t
val sexp_of_t :
('a -> Sexplib.Sexp.t) -> 'a Hash_set.Poly.t -> Sexplib.Sexp.t
end`