Module Persistent.Digraph

module Digraph: sig .. end

include Persistent.S

module ConcreteBidirectional: 
functor (V : Sig.COMPARABLE) -> Sig.P  with type V.t = V.t and type V.label = V.t and type E.t = V.t * V.t
          and type E.label = unit

module ConcreteBidirectionalLabeled: 
functor (V : Sig.COMPARABLE) -> 
functor (E : Sig.ORDERED_TYPE_DFT) -> Sig.P  with type V.t = V.t and type V.label = V.t
          and type E.t = V.t * E.t * V.t and type E.label = E.t