Dear list,

Is there a (clean) way to define simultaneously a class and a type that
are mutually recursive ?
Something like this :
class element (c : content) =
object
  ...
end and type content =
  | Data of string
  | Elements of element list;;

This is of course not a valid OCaml definition, but is there a way to
express it ?

Many thanks in advance for your help,
Sébastien.