Module type Sig.Graph

module type Graph = sig .. end

include Sig.GraphAlgo

val create : ?n:int -> ?m:int -> unit -> t

type node 

val vertex : t -> node -> vertex

val node : t -> vertex -> node

val add_node : t -> node -> unit

val add_edge : t -> node -> node -> unit

val iter_edges : (node -> node -> unit) -> t -> unit