 typename result_of::next<It>::type                , boost::result_of<                      F(                          typename add_reference<typename State::type>::type,                          typename fusion::result_of::deref<It const>::type                      )                  >                , F              >          {};          template<typename It, typename State, typename F>          BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED          inline typename result_of_