Ticket #1519: lvalue_function.patch

transform_iterator.hpp

@@ -80 +80 @@
             transform_iterator<UnaryFunc, Iterator, Reference, Value>
           , Iterator
           , cv_value_type
-          , use_default    // Leave the traversal category alone
+          , typename pure_traversal_tag<typename iterator_traversal<Iterator>::type>::type
           , reference
         > type;
     };