Merge pull request #232 from abreis/stablegraph-contains-edge
Implement contains_edge for StableGraph
diff --git a/src/graph_impl/stable_graph/mod.rs b/src/graph_impl/stable_graph/mod.rs
index 20582a5..8819631 100644
--- a/src/graph_impl/stable_graph/mod.rs
+++ b/src/graph_impl/stable_graph/mod.rs
@@ -535,6 +535,14 @@
}
}
+ /// Lookup if there is an edge from `a` to `b`.
+ ///
+ /// Computes in **O(e')** time, where **e'** is the number of edges
+ /// connected to `a` (and `b`, if the graph edges are undirected).
+ pub fn contains_edge(&self, a: NodeIndex<Ix>, b: NodeIndex<Ix>) -> bool {
+ self.find_edge(a, b).is_some()
+ }
+
/// Lookup an edge from `a` to `b`.
///
/// Computes in **O(e')** time, where **e'** is the number of edges
