module type S = sig .. end
include Map.S
val keys : 'a t -> key list
Get a list of all keys in a map.
val union : 'a t -> 'a t -> 'a t
union m1 m2 keeps the values from m1
val inter : 'a t -> 'a t -> 'a t
inter m1 m2 keeps the values from m1
val minus : 'a t -> 'a t -> 'a t
minus m1 m2 returns m1 minus all the elements that are also in m2,
that is, m1 \ (m1 ∩ m2)
val xor : 'a t -> 'a t -> 'a t
xor m1 m2 is (m1 ∪ m2) \ (m1 ∩ m2)
val to_list : 'a t -> (key * 'a) list
to_list translates the map to a list.
val find_opt : key -> 'a t -> 'a option
same as Map.find but returns a 'a option