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diff --git a/boost_ext/boost/typeof/encode_decode_params.hpp b/boost_ext/boost/typeof/encode_decode_params.hpp
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+++ b/boost_ext/boost/typeof/encode_decode_params.hpp
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+// Copyright (C) 2005 Arkadiy Vertleyb
+// 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)
+
+#ifndef BOOST_TYPEOF_ENCODE_DECODE_PARAMS_HPP_INCLUDED
+#define BOOST_TYPEOF_ENCODE_DECODE_PARAMS_HPP_INCLUDED
+
+#include <boost/preprocessor/cat.hpp>
+#include <boost/preprocessor/repetition/repeat.hpp>
+
+// Assumes iter0 contains initial iterator
+
+#define BOOST_TYPEOF_DECODE_PARAM(z, n, text)   \
+    typedef boost::type_of::decode_type<iter##n> decode##n;     \
+    typedef typename decode##n::type p##n;      \
+    typedef typename decode##n::iter BOOST_PP_CAT(iter, BOOST_PP_INC(n));
+
+#define BOOST_TYPEOF_DECODE_PARAMS(n)\
+    BOOST_PP_REPEAT(n, BOOST_TYPEOF_DECODE_PARAM, ~)
+
+// The P0, P1, ... PN are encoded and added to V 
+
+#define BOOST_TYPEOF_ENCODE_PARAMS_BEGIN(z, n, text)\
+    typename boost::type_of::encode_type<
+
+#define BOOST_TYPEOF_ENCODE_PARAMS_END(z, n, text)\
+    , BOOST_PP_CAT(P, n)>::type
+
+#define BOOST_TYPEOF_ENCODE_PARAMS(n, ID)                   \
+    BOOST_PP_REPEAT(n, BOOST_TYPEOF_ENCODE_PARAMS_BEGIN, ~) \
+    typename boost::type_of::push_back<V, boost::mpl::size_t<ID> >::type      \
+    BOOST_PP_REPEAT(n, BOOST_TYPEOF_ENCODE_PARAMS_END, ~)
+
+#endif//BOOST_TYPEOF_ENCODE_DECODE_PARAMS_HPP_INCLUDED