In common.h, define func_lib for function objects. In configure.ac, define HAVE_STD_FUNCTION and HAVE_BOOST_FUNCTION. Include function headers in ndnboost.
diff --git a/ndnboost/function_types/detail/pp_arity_loop.hpp b/ndnboost/function_types/detail/pp_arity_loop.hpp
new file mode 100644
index 0000000..37989e9
--- /dev/null
+++ b/ndnboost/function_types/detail/pp_arity_loop.hpp
@@ -0,0 +1,149 @@
+
+// (C) Copyright Tobias Schwinger
+//
+// Use modification and distribution are subject to the boost Software License,
+// Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt).
+
+//------------------------------------------------------------------------------
+
+// no include guards, this file is intended for multiple inclusion
+
+#ifndef BOOST_FT_PREPROCESSING_MODE
+// input: BOOST_FT_mfp 0 or 1 <=> member function pointer?
+// input: BOOST_FT_type_name BOOST_FT_type --> "R (* ..._type_name)()" (pass2)
+#endif
+// input: BOOST_FT_syntax type macro to use
+// input: BOOST_FT_cc empty or cc specifier
+// input: BOOST_FT_ell empty or "..."
+// input: BOOST_FT_cv empty or cv qualifiers
+// input: BOOST_FT_flags single decimal integer encoding the flags
+// output: BOOST_FT_n number of component types (arity+1)
+// output: BOOST_FT_arity current arity
+// output: BOOST_FT_type macro that expands to the type
+// output: BOOST_FT_tplargs(p) template arguments with given prefix
+// output: BOOST_FT_params(p) parameters with given prefix
+
+#ifdef __WAVE__
+# pragma wave option(preserve: 0)
+#endif
+
+#ifndef BOOST_FT_ARITY_LOOP_IS_ITERATING
+
+# define BOOST_FT_AL_PREPROCESSED \
+ BOOST_FT_AL_FILE(BOOST_FT_al_path,BOOST_FT_FROM_ARITY,BOOST_FT_mfp)
+
+# define BOOST_FT_AL_FILE(base_path,max_arity,mfp) \
+ BOOST_FT_AL_FILE_I(base_path,max_arity,mfp)
+# define BOOST_FT_AL_FILE_I(base_path,max_arity,mfp) \
+ <base_path/arity ## max_arity ## _ ## mfp.hpp>
+
+# if !defined(BOOST_FT_PREPROCESSING_MODE)
+
+# if BOOST_FT_MAX_ARITY < 10
+# define BOOST_FT_FROM_ARITY 0
+# elif BOOST_FT_MAX_ARITY < 20
+# define BOOST_FT_FROM_ARITY 10
+# elif BOOST_FT_MAX_ARITY < 30
+# define BOOST_FT_FROM_ARITY 20
+# elif BOOST_FT_MAX_ARITY < 40
+# define BOOST_FT_FROM_ARITY 30
+# endif
+
+# if BOOST_FT_FROM_ARITY
+# include BOOST_FT_AL_PREPROCESSED
+# endif
+
+# elif !defined(BOOST_FT_FROM_ARITY) // single pass preprocessing
+# define BOOST_FT_FROM_ARITY 0
+
+# elif BOOST_FT_FROM_ARITY > 0 // arity20 includes arity10
+BOOST_PP_EXPAND(#) include BOOST_FT_AL_PREPROCESSED
+# endif
+
+# undef BOOST_FT_AL_PREPROCESSED
+
+# undef BOOST_FT_AL_FILE
+# undef BOOST_FT_AL_FILE_I
+
+# if BOOST_FT_MAX_ARITY > BOOST_FT_FROM_ARITY
+
+# ifndef BOOST_FT_DETAIL_ARITY_LOOP_HPP_INCLUDED
+# define BOOST_FT_DETAIL_ARITY_LOOP_HPP_INCLUDED
+# include <ndnboost/preprocessor/cat.hpp>
+# include <ndnboost/preprocessor/tuple/eat.hpp>
+# include <ndnboost/preprocessor/control/if.hpp>
+# include <ndnboost/preprocessor/arithmetic/inc.hpp>
+# include <ndnboost/preprocessor/facilities/empty.hpp>
+# include <ndnboost/preprocessor/facilities/expand.hpp>
+# include <ndnboost/preprocessor/iteration/iterate.hpp>
+# include <ndnboost/preprocessor/repetition/enum_params.hpp>
+# include <ndnboost/preprocessor/repetition/enum_shifted_params.hpp>
+# include <ndnboost/preprocessor/repetition/enum_trailing_params.hpp>
+# endif
+
+# define BOOST_FT_AL_INCLUDE_FILE <BOOST_FT_al_path/master.hpp>
+
+# define BOOST_FT_ARITY_LOOP_PREFIX 1
+# include BOOST_FT_AL_INCLUDE_FILE
+# undef BOOST_FT_ARITY_LOOP_PREFIX
+
+# if !BOOST_PP_IS_ITERATING
+# define BOOST_PP_FILENAME_1 BOOST_FT_AL_INCLUDE_FILE
+# elif BOOST_PP_ITERATION_DEPTH() == 1
+# define BOOST_PP_FILENAME_2 BOOST_FT_AL_INCLUDE_FILE
+# else
+# error "loops nested too deeply"
+# endif
+
+# define BOOST_FT_arity BOOST_PP_ITERATION()
+# define BOOST_FT_n BOOST_PP_INC(BOOST_FT_arity)
+
+# define BOOST_FT_type \
+ BOOST_FT_syntax(BOOST_FT_cc,BOOST_FT_type_name BOOST_PP_EMPTY)\
+ (BOOST_FT_params(BOOST_PP_EMPTY) BOOST_FT_ell) BOOST_FT_cv
+
+# define BOOST_FT_tplargs(prefx) \
+ prefx() R BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_FT_arity,prefx() T)
+
+# if !BOOST_FT_mfp
+
+# define BOOST_FT_params(prefx) \
+ BOOST_PP_IF(BOOST_FT_arity,BOOST_PP_ENUM_PARAMS, \
+ BOOST_FT_nullary_param BOOST_PP_TUPLE_EAT(2))( \
+ BOOST_FT_arity,prefx() T)
+# else
+
+# define BOOST_FT_params(prefx) \
+ BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_FT_arity,prefx() T)
+
+# endif
+
+# if !BOOST_FT_FROM_ARITY
+# define BOOST_PP_ITERATION_LIMITS (BOOST_FT_mfp, BOOST_FT_MAX_ARITY)
+# else
+# define BOOST_PP_ITERATION_LIMITS \
+ (BOOST_FT_FROM_ARITY+1, BOOST_FT_MAX_ARITY)
+# endif
+
+# define BOOST_FT_ARITY_LOOP_IS_ITERATING 1
+# include BOOST_PP_ITERATE()
+# undef BOOST_FT_ARITY_LOOP_IS_ITERATING
+
+# undef BOOST_FT_arity
+# undef BOOST_FT_params
+# undef BOOST_FT_tplargs
+# undef BOOST_FT_type
+
+# define BOOST_FT_ARITY_LOOP_SUFFIX 1
+# include BOOST_FT_AL_INCLUDE_FILE
+# undef BOOST_FT_ARITY_LOOP_SUFFIX
+
+# undef BOOST_FT_AL_INCLUDE_FILE
+# endif
+
+# undef BOOST_FT_FROM_ARITY
+
+#else
+# error "attempt to nest arity loops"
+#endif
+