Hmap.Key
Keys.
val create : unit -> 'a key
create () is a new key.
create ()
Exisential keys allows to compare keys. This can be useful for functions like filter.
filter
type t
The type for existential keys.
val hide_type : 'a key -> t
hide_type k is an existential key for k.
hide_type k
k
val equal : t -> t -> bool
equal k k' is true iff k and k' are the same key.
equal k k'
true
k'
val compare : t -> t -> int
compare k k' is a total order on keys compatible with equal.
compare k k'
equal