Hi Mike,

What I did, which may or not be powerful enough for you, was to use classes.
I'm actually hoping that this thread comes up with something better for me to
use:


class type opaque_type =
object(s)
	... various methods required of all data items ...
end

type datavalue =
	| Int of int
	| Float of float
	| Opaque of opaque_type


So it is fairly easy to add a new type, or some kind of weird opaque reference.
I haven't really used it much, so I don't know of its limitations.

Kenn

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