diff --git a/ndnboost/mpl/aux_/template_arity.hpp b/ndnboost/mpl/aux_/template_arity.hpp
new file mode 100644
index 0000000..47a8398
--- /dev/null
+++ b/ndnboost/mpl/aux_/template_arity.hpp
@@ -0,0 +1,189 @@
+
+#if !defined(BOOST_PP_IS_ITERATING)
+
+///// header body
+
+#ifndef BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED
+#define BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED
+
+// Copyright Aleksey Gurtovoy 2001-2004
+//
+// 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)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Id: template_arity.hpp 61584 2010-04-26 18:48:26Z agurtovoy $
+// $Date: 2010-04-26 11:48:26 -0700 (Mon, 26 Apr 2010) $
+// $Revision: 61584 $
+
+#include <ndnboost/mpl/aux_/config/ttp.hpp>
+#include <ndnboost/mpl/aux_/config/lambda.hpp>
+
+#if !defined(BOOST_MPL_PREPROCESSING_MODE)
+#   include <ndnboost/mpl/aux_/template_arity_fwd.hpp>
+#   include <ndnboost/mpl/int.hpp>
+#   if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)
+#   if defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)
+#       include <ndnboost/mpl/aux_/type_wrapper.hpp>
+#   endif
+#   else
+#       include <ndnboost/mpl/aux_/has_rebind.hpp>
+#   endif
+#endif
+
+#include <ndnboost/mpl/aux_/config/static_constant.hpp>
+#include <ndnboost/mpl/aux_/config/use_preprocessed.hpp>
+
+#if !defined(BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS) \
+    && !defined(BOOST_MPL_PREPROCESSING_MODE)
+
+#   define BOOST_MPL_PREPROCESSED_HEADER template_arity.hpp
+#   include <ndnboost/mpl/aux_/include_preprocessed.hpp>
+
+#else
+
+#   if !defined(BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT)
+#   if defined(BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING)
+
+#   include <ndnboost/mpl/limits/arity.hpp>
+#   include <ndnboost/mpl/aux_/preprocessor/range.hpp>
+#   include <ndnboost/mpl/aux_/preprocessor/repeat.hpp>
+#   include <ndnboost/mpl/aux_/preprocessor/params.hpp>
+#   include <ndnboost/mpl/aux_/nttp_decl.hpp>
+
+#   include <ndnboost/preprocessor/seq/fold_left.hpp>
+#   include <ndnboost/preprocessor/comma_if.hpp>
+#   include <ndnboost/preprocessor/iterate.hpp>
+#   include <ndnboost/preprocessor/inc.hpp>
+#   include <ndnboost/preprocessor/cat.hpp>
+
+#   define AUX778076_ARITY BOOST_PP_INC(BOOST_MPL_LIMIT_METAFUNCTION_ARITY)
+
+namespace ndnboost { namespace mpl { namespace aux {
+
+template< BOOST_MPL_AUX_NTTP_DECL(int, N) > struct arity_tag
+{
+    typedef char (&type)[N + 1];
+};
+
+#   define AUX778076_MAX_ARITY_OP(unused, state, i_) \
+    ( BOOST_PP_CAT(C,i_) > 0 ? BOOST_PP_CAT(C,i_) : state ) \
+/**/
+
+template<
+      BOOST_MPL_PP_PARAMS(AUX778076_ARITY, BOOST_MPL_AUX_NTTP_DECL(int, C))
+    >
+struct max_arity
+{
+    BOOST_STATIC_CONSTANT(int, value = 
+          BOOST_PP_SEQ_FOLD_LEFT(
+              AUX778076_MAX_ARITY_OP
+            , -1
+            , BOOST_MPL_PP_RANGE(1, AUX778076_ARITY)
+            )
+        );
+};
+
+#   undef AUX778076_MAX_ARITY_OP
+
+arity_tag<0>::type arity_helper(...);
+
+#   define BOOST_PP_ITERATION_LIMITS (1, AUX778076_ARITY)
+#   define BOOST_PP_FILENAME_1 <ndnboost/mpl/aux_/template_arity.hpp>
+#   include BOOST_PP_ITERATE()
+
+template< typename F, BOOST_MPL_AUX_NTTP_DECL(int, N) >
+struct template_arity_impl
+{
+    BOOST_STATIC_CONSTANT(int, value = 
+          sizeof(::ndnboost::mpl::aux::arity_helper(type_wrapper<F>(),arity_tag<N>())) - 1
+        );
+};
+
+#   define AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION(unused, i_, F) \
+    BOOST_PP_COMMA_IF(i_) template_arity_impl<F,BOOST_PP_INC(i_)>::value \
+/**/
+
+template< typename F >
+struct template_arity
+{
+    BOOST_STATIC_CONSTANT(int, value = (
+          max_arity< BOOST_MPL_PP_REPEAT(
+              AUX778076_ARITY
+            , AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION
+            , F
+            ) >::value
+        ));
+        
+    typedef mpl::int_<value> type;
+};
+
+#   undef AUX778076_TEMPLATE_ARITY_IMPL_INVOCATION
+
+#   undef AUX778076_ARITY
+
+}}}
+
+#   endif // BOOST_MPL_CFG_EXTENDED_TEMPLATE_PARAMETERS_MATCHING
+#   else // BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT
+
+#   include <ndnboost/mpl/aux_/config/eti.hpp>
+
+namespace ndnboost { namespace mpl { namespace aux {
+
+template< bool >
+struct template_arity_impl
+{
+    template< typename F > struct result_
+        : mpl::int_<-1>
+    {
+    };
+};
+
+template<>
+struct template_arity_impl<true>
+{
+    template< typename F > struct result_
+        : F::arity
+    {
+    };
+};
+
+template< typename F >
+struct template_arity
+    : template_arity_impl< ::ndnboost::mpl::aux::has_rebind<F>::value >
+        ::template result_<F>
+{
+};
+
+#if defined(BOOST_MPL_CFG_MSVC_ETI_BUG)
+template<>
+struct template_arity<int>
+    : mpl::int_<-1>
+{
+};
+#endif
+
+}}}
+
+#   endif // BOOST_MPL_CFG_NO_FULL_LAMBDA_SUPPORT
+
+#endif // BOOST_MPL_CFG_NO_PREPROCESSED_HEADERS
+#endif // BOOST_MPL_AUX_TEMPLATE_ARITY_HPP_INCLUDED
+
+///// iteration
+
+#else
+#define i_ BOOST_PP_FRAME_ITERATION(1)
+
+template<
+      template< BOOST_MPL_PP_PARAMS(i_, typename P) > class F
+    , BOOST_MPL_PP_PARAMS(i_, typename T)
+    >
+typename arity_tag<i_>::type
+arity_helper(type_wrapper< F<BOOST_MPL_PP_PARAMS(i_, T)> >, arity_tag<i_>);
+
+#undef i_
+#endif // BOOST_PP_IS_ITERATING