sig
type graph
type vertex
exception Edge_not_unique
val create : unit -> Pxp_dfa.Graph.graph
val new_vertex : Pxp_dfa.Graph.graph -> Pxp_dfa.Graph.vertex
val new_edge :
Pxp_dfa.Graph.vertex -> string -> Pxp_dfa.Graph.vertex -> unit
val union : Pxp_dfa.Graph.graph -> Pxp_dfa.Graph.graph -> unit
val outgoing_edges :
Pxp_dfa.Graph.vertex -> (string * Pxp_dfa.Graph.vertex) list
val follow_edge : Pxp_dfa.Graph.vertex -> string -> Pxp_dfa.Graph.vertex
val ingoing_edges :
Pxp_dfa.Graph.vertex -> (Pxp_dfa.Graph.vertex * string) list
end