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diff --git a/boost/fusion/view/flatten_view/flatten_view.hpp b/boost/fusion/view/flatten_view/flatten_view.hpp
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+/*//////////////////////////////////////////////////////////////////////////////
+    Copyright (c) 2013 Jamboree
+
+    Distributed under the Boost Software License, Version 1.0. (See accompanying
+    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//////////////////////////////////////////////////////////////////////////////*/
+#ifndef BOOST_FUSION_FLATTEN_VIEW_HPP_INCLUDED
+#define BOOST_FUSION_FLATTEN_VIEW_HPP_INCLUDED
+
+
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/single_view.hpp>
+#include <boost/fusion/support/detail/access.hpp>
+#include <boost/fusion/support/is_view.hpp>
+#include <boost/fusion/support/category_of.hpp>
+#include <boost/fusion/support/sequence_base.hpp>
+#include <boost/fusion/sequence/intrinsic/begin.hpp>
+#include <boost/fusion/sequence/intrinsic/end.hpp>
+#include <boost/fusion/view/flatten_view/flatten_view_iterator.hpp>
+
+
+namespace boost { namespace fusion
+{
+    struct forward_traversal_tag;
+    struct flatten_view_tag;
+    
+    template <typename Sequence>
+    struct flatten_view
+      : sequence_base<flatten_view<Sequence> >
+    {
+        typedef flatten_view_tag fusion_tag;
+        typedef fusion_sequence_tag tag; // this gets picked up by MPL
+        typedef mpl::true_ is_view;
+        typedef forward_traversal_tag category;
+        
+        typedef Sequence sequence_type;
+        typedef typename result_of::begin<Sequence>::type first_type;
+        typedef typename result_of::end<Sequence>::type last_type;
+        
+        explicit flatten_view(Sequence& seq)
+          : seq(seq)
+        {}
+        
+        first_type first() const { return fusion::begin(seq); }
+        last_type last() const { return fusion::end(seq); }
+        
+        typename mpl::if_<traits::is_view<Sequence>, Sequence, Sequence&>::type seq;
+    };
+}}
+
+namespace boost { namespace fusion { namespace extension
+{
+    template<>
+    struct begin_impl<flatten_view_tag>
+    {
+        template<typename Sequence>
+        struct apply
+        {
+            typedef typename Sequence::first_type first_type;
+            
+            typedef typename
+                    result_of::begin<
+                        mpl::single_view<
+                            typename Sequence::sequence_type> >::type
+            root_iterator;
+            
+            typedef
+                detail::seek_descent<root_iterator, first_type>
+            seek_descent;
+            
+            typedef typename seek_descent::type type;
+
+            static inline
+            type call(Sequence& seq)
+            {
+                return seek_descent::apply(root_iterator(), seq.first());
+            }
+        };
+    };
+    
+    template<>
+    struct end_impl<flatten_view_tag>
+    {
+        template<typename Sequence>
+        struct apply
+        {
+            typedef typename Sequence::last_type last_type;
+            
+            typedef typename
+                    result_of::end<
+                        mpl::single_view<
+                            typename Sequence::sequence_type> >::type
+            type;
+
+            static inline
+            type call(Sequence&)
+            {
+                return type();
+            }
+        };
+    };
+
+    template<>
+    struct size_impl<flatten_view_tag>
+    {
+        template <typename Sequence>
+        struct apply
+          : result_of::distance
+            <
+                typename result_of::begin<Sequence>::type
+              , typename result_of::end<Sequence>::type
+            >
+        {};
+    };
+
+    template<>
+    struct empty_impl<flatten_view_tag>
+    {
+        template <typename Sequence>
+        struct apply
+          : result_of::empty<typename Sequence::sequence_type>
+        {};
+    };
+}}}
+
+
+#endif