Changeset 1162:404b98971e1f in lemon for lemon/core.h

Timestamp:

09/13/12 12:13:19 (12 years ago)

Author:

Alpar Juttner <alpar@…>

Branch:

default

Parents:

1155:b6347aae6575 (diff), 1160:00f8d9f9920d (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Phase:

public

Message:

Merge #449

File:

• lemon/core.h (modified) (1 diff)

lemon/core.h

@@ -447 +447 @@
 
   }
+
+  /// \brief Check whether a graph is undirected.
+  ///
+  /// This function returns \c true if the given graph is undirected.
+#ifdef DOXYGEN
+  template <typename GR>
+  bool undirected(const GR& g) { return false; }
+#else
+  template <typename GR>
+  typename enable_if<UndirectedTagIndicator<GR>, bool>::type
+  undirected(const GR&) {
+    return true;
+  }
+  template <typename GR>
+  typename disable_if<UndirectedTagIndicator<GR>, bool>::type
+  undirected(const GR&) {
+    return false;
+  }
+#endif
 
   /// \brief Class to copy a digraph.