| /*============================================================================= |
| Copyright (c) 2001-2006 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/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 : |
| extension::is_view_impl<typename fusion::detail::tag_of<T>::type>:: |
| template apply<T>::type |
| {}; |
| } |
| }} |
| |
| #endif |