Module Datalog.Univ

module Univ: sig .. end
This module is present to allow the user to extend explanations with her own types.

This is largely inspired by this thread
type t 
The universal type
type 'a embedding 
Conversion between the universal type and 'a
val embed : unit -> 'a embedding
Create a new embedding. Values packed by a given embedding can only be unpacked by the same embedding.
val pack : 'a embedding -> 'a -> t
val unpack : 'a embedding -> t -> 'a option
val compatible : 'a embedding -> t -> bool