# Module type Pqueue.OrderedType

    module type OrderedType = sig .. end

Input signature of the functors `Pqueue.MakeMin` and `Pqueue.MakeMax`.

    type t

The type of elements.

    val compare : t -> t -> int

A 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
e2` is strictly positive if `e1` is greater than `e2`.

The generic structural comparison function `compare` is a suitable ordering function for element types such as `int` or `string`.