Module type GenVars.CVAR


module type CVAR = functor (Obs : OBSERVER) -> VAR 
  with type obs = Obs.t
Parameters:
Obs : OBSERVER

include GenVars.VAR_WITHOUT_IMG
type img 
The image
val add_img : img -> t -> unit
extends the image of the mapping from type variables to types
val get_img : t -> img option
returns the image