module type OrderedType =sig..end
Input signature of the functors Pqueue.MakeMin and Pqueue.MakeMax.
type
The type of elements.
val compare : t -> t -> intA total ordering function to compare elements.
This is a two-argument function f such that f e1 e2 is
zero if the elements e1 and e2 are equal, f e1 e2 is
strictly negative if e1 is smaller than e2, and f e1 is strictly positive if
e2e1 is greater than e2.
The generic structural comparison function compare
is a suitable ordering function for element types such as
int or string.