Ticket #9072: allow_func_ref.patch

boost/range/iterator_range_core.hpp

@@ -24 +24 @@
 #include <boost/mpl/or.hpp>
 #include <boost/type_traits/is_abstract.hpp>
 #include <boost/type_traits/is_array.hpp>
+#include <boost/type_traits/is_function.hpp>
 #include <boost/type_traits/is_pointer.hpp>
 #include <boost/range/functions.hpp>
 #include <boost/range/iterator.hpp>
@@ -170 +171 @@
         private: // for return value of operator()()
             typedef BOOST_DEDUCED_TYPENAME
                 boost::mpl::if_< boost::mpl::or_< boost::is_abstract< value_type >, 
-                                                  boost::is_array< value_type > >,
+                                                  boost::is_array< value_type >,
+                                                  boost::is_function< value_type > >,
                                  reference, value_type >::type abstract_value_type;
 
         public: