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+/*=============================================================================
+ Copyright (c) 2001-2011 Joel de Guzman
+ Copyright (c) 2005-2006 Dan Marsden
+
+ 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)
+==============================================================================*/
+#if !defined(BOOST_FUSION_CATEGORY_OF_IMPL_20060217_2141)
+#define BOOST_FUSION_CATEGORY_OF_IMPL_20060217_2141
+
+#include <boost/fusion/support/detail/mpl_iterator_category.hpp>
+#include <boost/mpl/begin_end.hpp>
+#include <boost/mpl/is_sequence.hpp>
+#include <boost/static_assert.hpp>
+
+namespace boost { namespace fusion {
+
+ namespace detail
+ {
+ template <typename T>
+ struct mpl_sequence_category_of
+ {
+ // assumes T is an mpl sequence
+ // there should be no way this will ever be
+ // called where T is an mpl iterator
+
+ BOOST_STATIC_ASSERT(mpl::is_sequence<T>::value);
+ typedef typename
+ mpl_iterator_category<
+ typename mpl::begin<T>::type::category
+ >::type
+ type;
+ };
+ }
+
+ struct mpl_sequence_tag;
+
+ namespace extension
+ {
+ template<typename Tag>
+ struct category_of_impl;
+
+ template<>
+ struct category_of_impl<mpl_sequence_tag>
+ {
+ template<typename T>
+ struct apply
+ : detail::mpl_sequence_category_of<T>
+ {};
+ };
+ }
+}}
+
+#endif