forked from boostorg/fusion
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2006 Joel de Guzman
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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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/type_traits/is_base_and_derived.hpp>
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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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namespace boost { namespace fusion
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{
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struct non_fusion_tag;
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struct 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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: is_base_and_derived<sequence_root, T>
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{
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template<typename Sequence>
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struct apply
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: is_base_and_derived<sequence_root, Sequence>
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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<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<typename detail::tag_of<T>::type>::
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template apply<T>
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{};
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}
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}}
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#endif
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