added main empty_impl template forward decl

[SVN r73689]
2011-08-12 05:18:44 +00:00
parent acc306d783
commit faa5746f6d
1 changed files with 5 additions and 2 deletions
--- a/include/boost/fusion/adapted/mpl/detail/empty_impl.hpp
+++ b/include/boost/fusion/adapted/mpl/detail/empty_impl.hpp
@ -16,6 +16,9 @@ namespace boost { namespace fusion

    namespace extension
    {
+        template <typename Sequence>
+        struct empty_impl;
+
        template <>
        struct empty_impl<mpl_sequence_tag>
        {