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+++ b/3rdParty/Boost/src/boost/proto/transform/detail/preprocessed/fold_impl.hpp
@@ -0,0 +1,387 @@
+    ///////////////////////////////////////////////////////////////////////////////
+    /// \file fold_impl.hpp
+    /// Contains definition of fold_impl<> and reverse_fold_impl<> templates.
+    //
+    //  Copyright 2008 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)
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 1>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1;
+        typedef state1 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d );
+            return s1;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 1>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state1;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state1 s1 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 2>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2;
+        typedef state2 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d );
+            return s2;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 2>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state2;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state2 s2 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 3>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3;
+        typedef state3 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d );
+            return s3;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 3>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state3;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state3 s3 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 4>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4;
+        typedef state4 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d );
+            return s4;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 4>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state4;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state4 s4 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 5>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >::result_type state5;
+        typedef state5 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >()( proto::child_c< 4>(e) , s4 , d );
+            return s5;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 5>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state5;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state5 s5 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >()( proto::child_c<4>(e) , s5 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 6>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >::result_type state6;
+        typedef state6 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >()( proto::child_c< 4>(e) , s4 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >()( proto::child_c< 5>(e) , s5 , d );
+            return s6;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 6>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state6;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state6 s6 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >()( proto::child_c<5>(e) , s6 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >()( proto::child_c<4>(e) , s5 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 7>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >::result_type state7;
+        typedef state7 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >()( proto::child_c< 4>(e) , s4 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >()( proto::child_c< 5>(e) , s5 , d ); state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >()( proto::child_c< 6>(e) , s6 , d );
+            return s7;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 7>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state7;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state7 s7 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >()( proto::child_c<6>(e) , s7 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >()( proto::child_c<5>(e) , s6 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >()( proto::child_c<4>(e) , s5 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 8>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >::result_type state7; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 7>::type , state7 , Data >::result_type state8;
+        typedef state8 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >()( proto::child_c< 4>(e) , s4 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >()( proto::child_c< 5>(e) , s5 , d ); state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >()( proto::child_c< 6>(e) , s6 , d ); state8 s8 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 7>::type , state7 , Data >()( proto::child_c< 7>(e) , s7 , d );
+            return s8;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 8>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state8;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 7 >::type , state8 , Data >::result_type state7; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state8 s8 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 7 >::type , state8 , Data >()( proto::child_c<7>(e) , s8 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >()( proto::child_c<6>(e) , s7 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >()( proto::child_c<5>(e) , s6 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >()( proto::child_c<4>(e) , s5 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 9>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >::result_type state7; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 7>::type , state7 , Data >::result_type state8; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 8>::type , state8 , Data >::result_type state9;
+        typedef state9 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >()( proto::child_c< 4>(e) , s4 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >()( proto::child_c< 5>(e) , s5 , d ); state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >()( proto::child_c< 6>(e) , s6 , d ); state8 s8 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 7>::type , state7 , Data >()( proto::child_c< 7>(e) , s7 , d ); state9 s9 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 8>::type , state8 , Data >()( proto::child_c< 8>(e) , s8 , d );
+            return s9;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 9>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state9;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 8 >::type , state9 , Data >::result_type state8; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 7 >::type , state8 , Data >::result_type state7; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state9 s9 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state8 s8 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 8 >::type , state9 , Data >()( proto::child_c<8>(e) , s9 , d ); state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 7 >::type , state8 , Data >()( proto::child_c<7>(e) , s8 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >()( proto::child_c<6>(e) , s7 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >()( proto::child_c<5>(e) , s6 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >()( proto::child_c<4>(e) , s5 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct fold_impl<State0, Fun, Expr, State, Data, 10>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state0;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >::result_type state7; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 7>::type , state7 , Data >::result_type state8; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 8>::type , state8 , Data >::result_type state9; typedef typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 9>::type , state9 , Data >::result_type state10;
+        typedef state10 result_type;
+        result_type operator ()(
+            typename fold_impl::expr_param e
+          , typename fold_impl::state_param s
+          , typename fold_impl::data_param d
+        ) const
+        {
+            state0 s0 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 0>::type , state0 , Data >()( proto::child_c< 0>(e) , s0 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 1>::type , state1 , Data >()( proto::child_c< 1>(e) , s1 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 2>::type , state2 , Data >()( proto::child_c< 2>(e) , s2 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 3>::type , state3 , Data >()( proto::child_c< 3>(e) , s3 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 4>::type , state4 , Data >()( proto::child_c< 4>(e) , s4 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 5>::type , state5 , Data >()( proto::child_c< 5>(e) , s5 , d ); state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 6>::type , state6 , Data >()( proto::child_c< 6>(e) , s6 , d ); state8 s8 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 7>::type , state7 , Data >()( proto::child_c< 7>(e) , s7 , d ); state9 s9 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 8>::type , state8 , Data >()( proto::child_c< 8>(e) , s8 , d ); state10 s10 = typename when<_, Fun>::template impl< typename result_of::child_c<Expr, 9>::type , state9 , Data >()( proto::child_c< 9>(e) , s9 , d );
+            return s10;
+        }
+    };
+    template<typename State0, typename Fun, typename Expr, typename State, typename Data>
+    struct reverse_fold_impl<State0, Fun, Expr, State, Data, 10>
+      : transform_impl<Expr, State, Data>
+    {
+        typedef typename when<_, State0>::template impl<Expr, State, Data>::result_type state10;
+        typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 9 >::type , state10 , Data >::result_type state9; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 8 >::type , state9 , Data >::result_type state8; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 7 >::type , state8 , Data >::result_type state7; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >::result_type state6; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >::result_type state5; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >::result_type state4; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >::result_type state3; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >::result_type state2; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >::result_type state1; typedef typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >::result_type state0;
+        typedef state0 result_type;
+        result_type operator ()(
+            typename reverse_fold_impl::expr_param e
+          , typename reverse_fold_impl::state_param s
+          , typename reverse_fold_impl::data_param d
+        ) const
+        {
+            state10 s10 =
+                typename when<_, State0>::template impl<Expr, State, Data>()(e, s, d);
+            state9 s9 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 9 >::type , state10 , Data >()( proto::child_c<9>(e) , s10 , d ); state8 s8 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 8 >::type , state9 , Data >()( proto::child_c<8>(e) , s9 , d ); state7 s7 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 7 >::type , state8 , Data >()( proto::child_c<7>(e) , s8 , d ); state6 s6 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 6 >::type , state7 , Data >()( proto::child_c<6>(e) , s7 , d ); state5 s5 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 5 >::type , state6 , Data >()( proto::child_c<5>(e) , s6 , d ); state4 s4 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 4 >::type , state5 , Data >()( proto::child_c<4>(e) , s5 , d ); state3 s3 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 3 >::type , state4 , Data >()( proto::child_c<3>(e) , s4 , d ); state2 s2 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 2 >::type , state3 , Data >()( proto::child_c<2>(e) , s3 , d ); state1 s1 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 1 >::type , state2 , Data >()( proto::child_c<1>(e) , s2 , d ); state0 s0 = typename when<_, Fun>::template impl< typename result_of::child_c< Expr , 0 >::type , state1 , Data >()( proto::child_c<0>(e) , s1 , d );
+            return s0;
+        }
+    };