The input signature of the functor
The type of the hashtable keys.
val equal :
t -> t -> bool
The equality predicate used to compare keys.
val hash :
int -> t -> int
A seeded hashing function on keys. The first argument is
the seed. It must be the case that if
equal x y is true,
hash seed x = hash seed y for any value of
A suitable choice for
hash is the function