`sig
type ('a, 'phantom) t
val length : ('a, 'b) t -> int
val is_empty : ('a, 'b) t -> bool
val iter : ('a, 'b) t -> f:('a -> unit) -> unit
val fold :
('a, 'b) t -> init:'accum -> f:('accum -> 'a -> 'accum) -> 'accum
val exists : ('a, 'b) t -> f:('a -> bool) -> bool
val for_all : ('a, 'b) t -> f:('a -> bool) -> bool
val count : ('a, 'b) t -> f:('a -> bool) -> int
val sum :
(module Commutative_group.S with type t = 'sum) ->
('a, 'b) t -> f:('a -> 'sum) -> 'sum
val find : ('a, 'b) t -> f:('a -> bool) -> 'a option
val find_map : ('a, 'c) t -> f:('a -> 'b option) -> 'b option
val to_list : ('a, 'b) t -> 'a list
val to_array : ('a, 'b) t -> 'a array
type ('a, 'cmp) tree
val invariants : ('a, 'b) t -> bool
val mem : ('a, 'b) t -> 'a -> bool
val add : ('a, 'cmp) t -> 'a -> ('a, 'cmp) t
val remove : ('a, 'cmp) t -> 'a -> ('a, 'cmp) t
val union : ('a, 'cmp) t -> ('a, 'cmp) t -> ('a, 'cmp) t
val inter : ('a, 'cmp) t -> ('a, 'cmp) t -> ('a, 'cmp) t
val diff : ('a, 'cmp) t -> ('a, 'cmp) t -> ('a, 'cmp) t
val symmetric_diff :
('a, 'cmp) t -> ('a, 'cmp) t -> ('a, 'a) Either.t Sequence.t
val compare_direct : ('a, 'cmp) t -> ('a, 'cmp) t -> int
val equal : ('a, 'cmp) t -> ('a, 'cmp) t -> bool
val subset : ('a, 'cmp) t -> ('a, 'cmp) t -> bool
val fold_until :
('a, 'c) t ->
init:'b -> f:('b -> 'a -> [ `Continue of 'b | `Stop of 'b ]) -> 'b
val fold_right : ('a, 'c) t -> init:'b -> f:('a -> 'b -> 'b) -> 'b
val iter2 :
('a, 'cmp) t ->
('a, 'cmp) t ->
f:([ `Both of 'a * 'a | `Left of 'a | `Right of 'a ] -> unit) -> unit
val filter : ('a, 'cmp) t -> f:('a -> bool) -> ('a, 'cmp) t
val partition_tf :
('a, 'cmp) t -> f:('a -> bool) -> ('a, 'cmp) t * ('a, 'cmp) t
val elements : ('a, 'b) t -> 'a list
val min_elt : ('a, 'b) t -> 'a option
val min_elt_exn : ('a, 'b) t -> 'a
val max_elt : ('a, 'b) t -> 'a option
val max_elt_exn : ('a, 'b) t -> 'a
val choose : ('a, 'b) t -> 'a option
val choose_exn : ('a, 'b) t -> 'a
val split : ('a, 'cmp) t -> 'a -> ('a, 'cmp) t * 'a option * ('a, 'cmp) t
val group_by :
('a, 'cmp) t -> equiv:('a -> 'a -> bool) -> ('a, 'cmp) t list
val find_exn : ('a, 'b) t -> f:('a -> bool) -> 'a
val find_index : ('a, 'b) t -> int -> 'a option
val remove_index : ('a, 'cmp) t -> int -> ('a, 'cmp) t
val to_tree : ('a, 'cmp) t -> ('a, 'cmp) Core_set_intf.Accessors2.tree
val to_sequence :
?order:[ `Decreasing | `Increasing ] ->
?greater_or_equal_to:'a ->
?less_or_equal_to:'a -> ('a, 'cmp) t -> 'a Sequence.t
val to_map : ('a, 'cmp) t -> f:('a -> 'b) -> ('a, 'b, 'cmp) Map.t
end`