A hash set that uses polymorphic comparison
include Creators_generic with type a t := a t with type 'a elt = 'a with type (key, z) create_options := (key, z) create_options_without_first_class_module
val create : ('a, unit ‑> 'a t) create_options
val of_list : ('a, 'a elt list ‑> 'a t) create_options
include Accessors with type a t := a t with type a elt := a elt
include Container.Generic
val length : _ t ‑> int
val is_empty : _ t ‑> bool
val fold_until : 'a t ‑> init:'accum ‑> f:('accum ‑> 'a elt ‑> ('accum, 'final) Base__.Container_intf.Continue_or_stop.t) ‑> finish:('accum ‑> 'final) ‑> 'final
val sum : (module Commutative_group.S with type t = 'sum) ‑> 'a t ‑> f:('a elt ‑> 'sum) ‑> 'sum
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 filter_inplace : 'a t ‑> f:('a ‑> bool) ‑> unit