/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2007 Tobias Schwinger
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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_SEQUENCE_BASE_04182005_0737)
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#define FUSION_SEQUENCE_BASE_04182005_0737
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#include <boost/config.hpp>
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#include <boost/fusion/support/config.hpp>
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#include <boost/mpl/begin_end_fwd.hpp>
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namespace boost { namespace fusion
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{
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namespace detail
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{
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struct from_sequence_convertible_type
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{};
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}
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template <typename Sequence>
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struct sequence_base
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{
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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Sequence const&
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derived() const BOOST_NOEXCEPT
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{
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return static_cast<Sequence const&>(*this);
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}
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BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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Sequence&
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derived() BOOST_NOEXCEPT
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{
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return static_cast<Sequence&>(*this);
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}
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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operator detail::from_sequence_convertible_type() const BOOST_NOEXCEPT
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{
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return detail::from_sequence_convertible_type();
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}
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};
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struct fusion_sequence_tag;
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}}
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namespace boost { namespace mpl
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{
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// Deliberately break mpl::begin, so it doesn't lie that a Fusion sequence
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// is not an MPL sequence by returning mpl::void_.
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// In other words: Fusion Sequences are always MPL Sequences, but they can
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// be incompletely defined.
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template<> struct begin_impl< boost::fusion::fusion_sequence_tag >;
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}}
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#endif
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