Derived2
creates a comparator
function that constructs a comparator for the type
('a, 'b) t
given comparators for the type 'a
and 'b
.
M : sig ... end
val comparator : ('a, 'cmp_a) comparator ‑> ('b, 'cmp_b) comparator ‑> (('a, 'b) t, ('cmp_a, 'cmp_b) comparator_witness) comparator