| /*============================================================================= | |
| Copyright (c) 2001-2006 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 |