From 5ce0418131c99828ced3e16f64e627e167e4a181 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Mon, 14 Mar 2005 16:27:52 +0000
Subject: [PATCH] Added is_directed member function

[SVN r27651]
---
 src/python/basic_graph.cpp | 1 +
 src/python/basic_graph.hpp | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/python/basic_graph.cpp b/src/python/basic_graph.cpp
index 3f7fefc5..f0a97ed8 100644
--- a/src/python/basic_graph.cpp
+++ b/src/python/basic_graph.cpp
@@ -493,6 +493,7 @@ void export_basic_graph(const char* name)
       class_<basic_graph<DirectedS> >(name)
         // Constructors
         .def(init<std::string, graph_file_kind>())
+        .def("is_directed", &Graph::is_directed)
         // Vertex List Graph concept
         .def("num_vertices", &Graph::num_vertices)
         .add_property("vertices", range(&Graph::vertices_begin, 
diff --git a/src/python/basic_graph.hpp b/src/python/basic_graph.hpp
index 99ebf202..d1428757 100644
--- a/src/python/basic_graph.hpp
+++ b/src/python/basic_graph.hpp
@@ -209,7 +209,10 @@ class basic_graph
 
   basic_graph();
   basic_graph(const std::string& filename, graph_file_kind kind); 
-  
+
+  bool is_directed() const
+  { return is_convertible<directed_category, directed_tag>::value; }
+
   Vertex add_vertex();
   void clear_vertex(Vertex vertex);
   void remove_vertex(Vertex vertex);