/*============================================================================= Copyright (c) 2001-2011 Joel de Guzman 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(FUSION_IS_VIEW_03202006_0015) #define FUSION_IS_VIEW_03202006_0015 #include <boost/fusion/support/config.hpp> #include <boost/mpl/bool.hpp> #include <boost/fusion/support/detail/is_view.hpp> #include <boost/fusion/support/tag_of.hpp> namespace boost { namespace fusion { // Special tags: struct sequence_facade_tag; struct boost_tuple_tag; // boost::tuples::tuple tag struct boost_array_tag; // boost::array tag struct mpl_sequence_tag; // mpl sequence tag struct std_pair_tag; // std::pair tag namespace extension { template<typename Tag> struct is_view_impl { template <typename T> struct apply : detail::fusion_is_view<T> {}; }; template <> struct is_view_impl<sequence_facade_tag> { template <typename Sequence> struct apply : Sequence::is_view {}; }; template <> struct is_view_impl<boost_tuple_tag>; template <> struct is_view_impl<boost_array_tag>; template <> struct is_view_impl<mpl_sequence_tag>; template <> struct is_view_impl<std_pair_tag>; } namespace traits { template <typename T> struct is_view : mpl::bool_< (bool)extension::is_view_impl<typename fusion::detail::tag_of<T>::type>:: template apply<T>::type::value > {}; } }} #endif