diff -r fb261e3a9a0f -r 405ccc3105e1 src/work/marci/bipartite_graphs.h
--- a/src/work/marci/bipartite_graphs.h	Thu May 06 13:21:24 2004 +0000
+++ b/src/work/marci/bipartite_graphs.h	Thu May 06 13:44:48 2004 +0000
@@ -35,5 +35,26 @@
     }
     return true;
   }
+
+  /// experimental topsort, 
+  /// I think the final version will work as an iterator
+  template<typename Graph> 
+  void topSort(Graph& g, std::list<typename Graph::Node>& l) {
+    l.clear();
+    typedef typename Graph::template NodeMap<bool> ReachedMap;
+    ReachedMap reached(g/*, false*/);
+    DfsIterator<Graph, ReachedMap> dfs(g, reached);
+    FOR_EACH_LOC(typename Graph::NodeIt, n, g) {
+      if (!reached[n]) {
+	dfs.pushAndSetReached(n);
+	while (!bfs.finished()) {
+	  if (bfs.isANodeExamined()) {
+	    l.push_back(bfs.aNode());
+	  }
+	  ++bfs;
+	}
+      }
+    }
+  }
 }
 #endif //HUGO_BIPARTITE_GRAPHS_H