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