Module Contraction.G.E

module E: Sig.EDGE  with type vertex = vertex

type t

val compare : t -> t -> int

Edges are directed.

type vertex

val src : t -> vertex

Edge origin.

val dst : t -> vertex

Edge destination.

Edges are labeled.

type label

val create : vertex -> label -> vertex -> t

create v1 l v2 creates an edge from v1 to v2 with label l

val label : t -> label

Get the label of an edge.