type t
The type of the elements in the set.
The chosen t
must be infinite.
val compare : t -> t -> int
A total ordering function over the set 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
.