Std.PathPath between two nodes.
path is a walk without repetitions
type 'e t = 'e pathrepresentation type
val start : 'e t -> 'estart p the starting edge of a path p
val finish : 'e t -> 'efinish p the last edge of a path p
val edges : 'e t -> 'e Regular.Std.seqedges p a sequence of edges from start to finish
val edges_rev : 'e t -> 'e Regular.Std.seqedges_rev p a reversed sequence from finish to start
val weight : 'e t -> intweight p total weight of a path
val length : 'e t -> intamount of edges in a path
val pp : 'a Regular.Std.printer -> 'a t Regular.Std.printerpp pp_elt constructs a pretty based on element printer pp_elt