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74 lines
2.1 KiB
74 lines
2.1 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Distributed under the Boost Software License, Version 1.0. (See accompanying |
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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==============================================================================*/ |
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#if !defined(FUSION_IS_SEQUENCE_05052005_1002) |
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#define FUSION_IS_SEQUENCE_05052005_1002 |
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#include <boost/fusion/support/sequence_base.hpp> |
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#include <boost/fusion/support/tag_of.hpp> |
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#include <boost/mpl/is_sequence.hpp> |
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#include <boost/mpl/or.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/type_traits/is_convertible.hpp> |
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#include <boost/type_traits/is_same.hpp> |
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namespace boost { namespace fusion |
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{ |
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// Special tags: |
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struct non_fusion_tag; |
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struct boost_tuple_tag; // boost::tuples::tuple tag |
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struct boost_array_tag; // boost::array tag |
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struct mpl_sequence_tag; // mpl sequence tag |
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struct std_pair_tag; // std::pair tag |
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namespace extension |
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{ |
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template <typename T> |
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struct is_sequence_impl |
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{ |
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template <typename Sequence> |
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struct apply |
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: is_convertible<Sequence, detail::from_sequence_convertible_type> |
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{}; |
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}; |
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template <> |
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struct is_sequence_impl<non_fusion_tag> |
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{ |
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template <typename T> |
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struct apply : mpl::false_ {}; |
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}; |
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template <> |
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struct is_sequence_impl<boost_tuple_tag>; |
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template <> |
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struct is_sequence_impl<boost_array_tag>; |
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template <> |
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struct is_sequence_impl<mpl_sequence_tag>; |
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template <> |
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struct is_sequence_impl<std_pair_tag>; |
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} |
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namespace traits |
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{ |
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template <typename T> |
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struct is_sequence |
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: extension::is_sequence_impl< |
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typename fusion::detail::tag_of<T>::type |
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>::template apply<T> |
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{}; |
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template <typename Sequence, typename Enable = void> |
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struct is_native_fusion_sequence |
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: is_convertible<Sequence, detail::from_sequence_convertible_type> |
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{}; |
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} |
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}} |
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#endif
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