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65 lines
2.1 KiB
65 lines
2.1 KiB
3 years ago
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/*=============================================================================
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Copyright (c) 2011 Eric Niebler
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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(BOOST_FUSION_FOLD_S_HPP_INCLUDED)
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#define BOOST_FUSION_FOLD_S_HPP_INCLUDED
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#include <boost/fusion/support/config.hpp>
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#include <boost/fusion/algorithm/iteration/fold_fwd.hpp>
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#include <boost/fusion/support/segmented_fold_until.hpp>
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#include <boost/mpl/bool.hpp>
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namespace boost { namespace fusion { namespace detail
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{
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template <typename Fun>
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struct segmented_fold_fun
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{
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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explicit segmented_fold_fun(Fun const& f)
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: fun(f)
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{}
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Fun const& fun;
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template <typename Sequence, typename State, typename Context>
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struct apply
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{
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typedef typename result_of::fold<Sequence, State, Fun>::type type;
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typedef mpl::true_ continue_type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type call(Sequence& seq, State const& state, Context const&, segmented_fold_fun const& fun)
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{
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return fusion::fold(seq, state, fun.fun);
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}
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};
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};
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// The default implementation of this lives in detail/fold.hpp
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template <typename Sequence, typename State, typename Fun, bool IsSequence, bool IsSegmented>
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struct result_of_fold;
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template <typename Sequence, typename State, typename Fun>
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struct result_of_fold<Sequence, State, Fun, true, true>
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{
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typedef
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typename result_of::segmented_fold_until<
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Sequence,
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State,
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segmented_fold_fun<Fun>
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>::type
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type;
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BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
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static type call(Sequence& seq, State& state, Fun& fun)
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{
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return fusion::segmented_fold_until(seq, state, segmented_fold_fun<Fun>(fun));
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}
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};
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}}}
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#endif
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