Functor Datatype.Polymorphic.Make

module Make: 
functor (T : Datatype.S) -> Datatype.S with type t = T.t poly
Create a datatype for a monomorphic instance of the polymorphic type.
Parameters:
T : Datatype.S

include Datatype.S_no_copy
val copy : Datatype.t -> Datatype.t
Deep copy: no possible sharing between x and copy x.