Module type Map.OrderedType
module type OrderedType =sig..end
Input signature of the functor Map.Make.
type
The type of the map keys.
val compare : t -> t -> intA total ordering function over the keys.
This is a two-argument function f such that
f e1 e2 is zero if the keys 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 compare.
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