Index: iterator_facade.hpp
===================================================================
--- iterator_facade.hpp	(revision 45421)
+++ iterator_facade.hpp	(working copy)
@@ -352,6 +352,11 @@
           : m_iter(iter)
         {}
 
+        operator value_type() const
+        {
+            return value_type(*m_iter);
+        }
+         
         operator reference() const
         {
             return *m_iter;