Parameter Base.Set_intf.Check_creators.6-M

type ('a, 'cmp) t
type ('a, 'cmp) set
type ('a, 'cmp) tree
type 'a elt
type ('a, 'cmp, 'z) options
type 'cmp cmp
val empty : ('a'cmp, ('a'cmptoptions
val singleton : ('a'cmp'a elt ‑> ('a'cmptoptions
val union_list : ('a'cmp, ('a'cmpt list ‑> ('a'cmptoptions
val of_list : ('a'cmp'a elt list ‑> ('a'cmptoptions
val of_array : ('a'cmp'a elt array ‑> ('a'cmptoptions
val of_sorted_array : ('a'cmp'a elt array ‑> ('a'cmpt Or_error.toptions
val of_sorted_array_unchecked : ('a'cmp'a elt array ‑> ('a'cmptoptions
val of_increasing_iterator_unchecked : ('a'cmp, len:int ‑> f:(int ‑> 'a elt) ‑> ('a'cmptoptions
val stable_dedup_list : ('a_'a elt list ‑> 'a elt list) options
val map : ('b'cmp, ('a_set ‑> f:('a ‑> 'b elt) ‑> ('b'cmptoptions

The types of map and filter_map are subtle. The input set, ('a, _) set, reflects the fact that these functions take a set of *any* type, with any comparator, while the output set, ('b, 'cmp) t, reflects that the output set has the particular 'cmp of the creation function. The comparator can come in one of three ways, depending on which set module is used

val filter_map : ('b'cmp, ('a_set ‑> f:('a ‑> 'b elt option) ‑> ('b'cmptoptions
val of_tree : ('a'cmp, ('a elt'cmptree ‑> ('a'cmptoptions