iteration/detail/segmented_for_each.hpp

0001 /*=============================================================================
0002     Copyright (c) 2011 Eric Niebler
0003
0004     Distributed under the Boost Software License, Version 1.0. (See accompanying
0005     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 ==============================================================================*/
0007 #if !defined(BOOST_FUSION_SEGMENTED_FOR_EACH_HPP_INCLUDED)
0008 #define BOOST_FUSION_SEGMENTED_FOR_EACH_HPP_INCLUDED
0009
0010 #include <boost/fusion/support/config.hpp>
0011 #include <boost/mpl/bool.hpp>
0012 #include <boost/fusion/support/void.hpp>
0013 #include <boost/fusion/algorithm/iteration/for_each_fwd.hpp>
0014 #include <boost/fusion/support/segmented_fold_until.hpp>
0015
0016 #ifdef _MSC_VER
0017 #  pragma warning(push)
0018 #  pragma warning(disable: 4512) // assignment operator could not be generated.
0019 #endif
0020
0021 namespace boost { namespace fusion { namespace detail
0022 {
0023     template <typename Fun>
0024     struct segmented_for_each_fun
0025     {
0026         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0027         explicit segmented_for_each_fun(Fun& f)
0028           : fun(f)
0029         {}
0030
0031         Fun& fun;
0032
0033         template <typename Sequence, typename State, typename Context>
0034         struct apply
0035         {
0036             typedef void_ type;
0037             typedef mpl::true_ continue_type;
0038
0039             BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0040             static type call(Sequence& seq, State const&, Context const&, segmented_for_each_fun const& fun)
0041             {
0042                 fusion::for_each(seq, fun.fun);
0043                 return void_();
0044             }
0045         };
0046     };
0047
0048     template <typename Sequence, typename F>
0049     BOOST_CXX14_CONSTEXPR BOOST_FUSION_GPU_ENABLED
0050     inline void
0051     for_each(Sequence& seq, F& f, mpl::true_) // segmented implementation
0052     {
0053         fusion::segmented_fold_until(seq, void_(), segmented_for_each_fun<F>(f));
0054     }
0055 }}}
0056
0057 #ifdef _MSC_VER
0058 #  pragma warning(pop)
0059 #endif
0060
0061 #endif