allow map keys to be forward declared only

[SVN r84275]
2013-05-13 23:01:05 +00:00
parent 92ee36a556
commit e83960d3e9
2 changed files with 4 additions and 5 deletions
--- a/include/boost/fusion/container/map/map_iterator.hpp
+++ b/include/boost/fusion/container/map/map_iterator.hpp
@ -54,9 +54,8 @@ namespace boost { namespace fusion
        {
            typedef typename Iterator::sequence sequence;
            typedef typename Iterator::index index;
-            typedef
-                decltype(std::declval<sequence>().get_key(index()))
-            type;
+            typedef decltype(std::declval<sequence>().get_key(index())) key_identity_type;
+            typedef typename key_identity_type::type type;
        };

        template<typename Iterator>