module String.IString:uses icompare as ordering functionExtlib.Interfaces.OrderedTypewith type t = t
type t
val compare : Data.OrderedType.t -> Data.OrderedType.t -> intf such that
f e1 e2 is zero if the values 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.
Example: a suitable ordering function is the generic structural
comparison function Standard.compare.