val compare : 'a -> 'a -> int
val ascending : 'a -> 'a -> int
ascending is identical to compare. descending x y = ascending y x. These are intended to be mnemonic when used like List.sort ~cmp:ascending and List.sort ~cmp:descending, since they cause the list to be sorted in ascending or descending order, respectively.
val descending : 'a -> 'a -> int
val (<) : 'a -> 'a -> bool
val (<=) : 'a -> 'a -> bool
val (>) : 'a -> 'a -> bool
val (>=) : 'a -> 'a -> bool
val (=) : 'a -> 'a -> bool
val (<>) : 'a -> 'a -> bool
val equal : 'a -> 'a -> bool
val min : 'a -> 'a -> 'a
val max : 'a -> 'a -> 'a