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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/config.hpp>
- #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
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