diff --git a/ndnboost/functional.hpp b/ndnboost/functional.hpp
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+++ b/ndnboost/functional.hpp
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+// ------------------------------------------------------------------------------
+// Copyright (c) 2000 Cadenza New Zealand Ltd
+// Distributed under the Boost Software License, Version 1.0. (See accompany-
+// ing file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+// ------------------------------------------------------------------------------
+// Boost functional.hpp header file
+// See http://www.boost.org/libs/functional for documentation.
+// ------------------------------------------------------------------------------
+// $Id: functional.hpp 36246 2006-12-02 14:17:26Z andreas_huber69 $
+// ------------------------------------------------------------------------------
+
+#ifndef BOOST_FUNCTIONAL_HPP
+#define BOOST_FUNCTIONAL_HPP
+
+#include <ndnboost/config.hpp>
+#include <ndnboost/call_traits.hpp>
+#include <functional>
+
+namespace ndnboost
+{
+#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+    // --------------------------------------------------------------------------
+    // The following traits classes allow us to avoid the need for ptr_fun
+    // because the types of arguments and the result of a function can be 
+    // deduced.
+    //
+    // In addition to the standard types defined in unary_function and 
+    // binary_function, we add
+    //
+    // - function_type, the type of the function or function object itself.
+    //
+    // - param_type, the type that should be used for passing the function or
+    //   function object as an argument.
+    // --------------------------------------------------------------------------
+    namespace detail
+    {
+        template <class Operation>
+        struct unary_traits_imp;
+        
+        template <class Operation>
+        struct unary_traits_imp<Operation*>
+        {
+            typedef Operation                         function_type;
+            typedef const function_type &             param_type;
+            typedef typename Operation::result_type   result_type;
+            typedef typename Operation::argument_type argument_type;
+        };
+
+        template <class R, class A>
+        struct unary_traits_imp<R(*)(A)>
+        {
+            typedef R (*function_type)(A);
+            typedef R (*param_type)(A);
+            typedef R result_type;
+            typedef A argument_type;
+        };
+
+        template <class Operation>
+        struct binary_traits_imp;
+
+        template <class Operation>
+        struct binary_traits_imp<Operation*>
+        {
+            typedef Operation                                function_type;
+            typedef const function_type &                    param_type;
+            typedef typename Operation::result_type          result_type;
+            typedef typename Operation::first_argument_type  first_argument_type;
+            typedef typename Operation::second_argument_type second_argument_type;
+        };
+        
+        template <class R, class A1, class A2>
+        struct binary_traits_imp<R(*)(A1,A2)>
+        {
+            typedef R (*function_type)(A1,A2);
+            typedef R (*param_type)(A1,A2);
+            typedef R result_type;
+            typedef A1 first_argument_type;
+            typedef A2 second_argument_type;
+        };
+    } // namespace detail
+    
+    template <class Operation>
+    struct unary_traits
+    {
+        typedef typename detail::unary_traits_imp<Operation*>::function_type function_type;
+        typedef typename detail::unary_traits_imp<Operation*>::param_type    param_type;
+        typedef typename detail::unary_traits_imp<Operation*>::result_type   result_type;
+        typedef typename detail::unary_traits_imp<Operation*>::argument_type argument_type;
+    }; 
+
+    template <class R, class A>
+    struct unary_traits<R(*)(A)>
+    {
+        typedef R (*function_type)(A);
+        typedef R (*param_type)(A);
+        typedef R result_type;
+        typedef A argument_type;
+    };
+
+    template <class Operation>
+    struct binary_traits
+    {
+        typedef typename detail::binary_traits_imp<Operation*>::function_type        function_type;
+        typedef typename detail::binary_traits_imp<Operation*>::param_type           param_type;
+        typedef typename detail::binary_traits_imp<Operation*>::result_type          result_type;
+        typedef typename detail::binary_traits_imp<Operation*>::first_argument_type  first_argument_type;
+        typedef typename detail::binary_traits_imp<Operation*>::second_argument_type second_argument_type;
+    };
+    
+    template <class R, class A1, class A2>
+    struct binary_traits<R(*)(A1,A2)>
+    {
+        typedef R (*function_type)(A1,A2);
+        typedef R (*param_type)(A1,A2);
+        typedef R result_type;
+        typedef A1 first_argument_type;
+        typedef A2 second_argument_type;
+    };
+#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+    // --------------------------------------------------------------------------
+    // If we have no partial specialisation available, decay to a situation
+    // that is no worse than in the Standard, i.e., ptr_fun will be required.
+    // --------------------------------------------------------------------------
+
+    template <class Operation>
+    struct unary_traits
+    {
+        typedef Operation                         function_type;
+        typedef const Operation&                  param_type;
+        typedef typename Operation::result_type   result_type;
+        typedef typename Operation::argument_type argument_type;
+    }; 
+    
+    template <class Operation>
+    struct binary_traits
+    {
+        typedef Operation                                function_type;
+        typedef const Operation &                        param_type;
+        typedef typename Operation::result_type          result_type;
+        typedef typename Operation::first_argument_type  first_argument_type;
+        typedef typename Operation::second_argument_type second_argument_type;
+    };    
+#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
+    
+    // --------------------------------------------------------------------------
+    // unary_negate, not1
+    // --------------------------------------------------------------------------
+    template <class Predicate>
+    class unary_negate
+        : public std::unary_function<typename unary_traits<Predicate>::argument_type,bool>
+    {
+      public:
+        explicit unary_negate(typename unary_traits<Predicate>::param_type x)
+            :
+            pred(x)
+        {}
+        bool operator()(typename call_traits<typename unary_traits<Predicate>::argument_type>::param_type x) const
+        {
+            return !pred(x);
+        }
+      private:
+        typename unary_traits<Predicate>::function_type pred;
+    };
+
+    template <class Predicate>
+    unary_negate<Predicate> not1(const Predicate &pred)
+    {
+        // The cast is to placate Borland C++Builder in certain circumstances.
+        // I don't think it should be necessary.
+        return unary_negate<Predicate>((typename unary_traits<Predicate>::param_type)pred);
+    }
+
+    template <class Predicate>
+    unary_negate<Predicate> not1(Predicate &pred)
+    {
+        return unary_negate<Predicate>(pred);
+    }
+
+    // --------------------------------------------------------------------------
+    // binary_negate, not2
+    // --------------------------------------------------------------------------
+    template <class Predicate>
+    class binary_negate
+        : public std::binary_function<typename binary_traits<Predicate>::first_argument_type,
+                                      typename binary_traits<Predicate>::second_argument_type,
+                                      bool>
+    {
+      public:
+        explicit binary_negate(typename binary_traits<Predicate>::param_type x)
+            :
+            pred(x)
+        {}
+        bool operator()(typename call_traits<typename binary_traits<Predicate>::first_argument_type>::param_type x,
+                        typename call_traits<typename binary_traits<Predicate>::second_argument_type>::param_type y) const
+        {
+            return !pred(x,y);
+        }
+      private:
+        typename binary_traits<Predicate>::function_type pred;
+    };
+
+    template <class Predicate>
+    binary_negate<Predicate> not2(const Predicate &pred)
+    {
+        // The cast is to placate Borland C++Builder in certain circumstances.
+        // I don't think it should be necessary.
+        return binary_negate<Predicate>((typename binary_traits<Predicate>::param_type)pred);
+    }
+
+    template <class Predicate>
+    binary_negate<Predicate> not2(Predicate &pred)
+    {
+        return binary_negate<Predicate>(pred);
+    }
+        
+    // --------------------------------------------------------------------------
+    // binder1st, bind1st
+    // --------------------------------------------------------------------------
+    template <class Operation>
+    class binder1st
+        : public std::unary_function<typename binary_traits<Operation>::second_argument_type,
+                                     typename binary_traits<Operation>::result_type>
+    {       
+      public:
+        binder1st(typename binary_traits<Operation>::param_type x,
+                  typename call_traits<typename binary_traits<Operation>::first_argument_type>::param_type y)
+            :
+            op(x), value(y)
+        {}
+        
+        typename binary_traits<Operation>::result_type
+        operator()(typename call_traits<typename binary_traits<Operation>::second_argument_type>::param_type x) const
+        {
+            return op(value, x);
+        }
+        
+      protected:
+        typename binary_traits<Operation>::function_type op;
+        typename binary_traits<Operation>::first_argument_type value;
+    };
+
+    template <class Operation>
+    inline binder1st<Operation> bind1st(const Operation &op,
+                                        typename call_traits<
+                                                    typename binary_traits<Operation>::first_argument_type
+                                        >::param_type x)
+    {
+        // The cast is to placate Borland C++Builder in certain circumstances.
+        // I don't think it should be necessary.
+        return binder1st<Operation>((typename binary_traits<Operation>::param_type)op, x);
+    }
+
+    template <class Operation>
+    inline binder1st<Operation> bind1st(Operation &op,
+                                        typename call_traits<
+                                                    typename binary_traits<Operation>::first_argument_type
+                                        >::param_type x)
+    {
+        return binder1st<Operation>(op, x);
+    }
+
+    // --------------------------------------------------------------------------
+    // binder2nd, bind2nd
+    // --------------------------------------------------------------------------
+    template <class Operation>
+    class binder2nd
+        : public std::unary_function<typename binary_traits<Operation>::first_argument_type,
+                                     typename binary_traits<Operation>::result_type>
+    {
+      public:
+        binder2nd(typename binary_traits<Operation>::param_type x,
+                  typename call_traits<typename binary_traits<Operation>::second_argument_type>::param_type y)
+            :
+            op(x), value(y)
+        {}
+        
+        typename binary_traits<Operation>::result_type
+        operator()(typename call_traits<typename binary_traits<Operation>::first_argument_type>::param_type x) const
+        {
+            return op(x, value);
+        }               
+        
+      protected:
+        typename binary_traits<Operation>::function_type op;
+        typename binary_traits<Operation>::second_argument_type value;
+    };
+
+    template <class Operation>
+    inline binder2nd<Operation> bind2nd(const Operation &op,
+                                        typename call_traits<
+                                                    typename binary_traits<Operation>::second_argument_type
+                                        >::param_type x)
+    {
+        // The cast is to placate Borland C++Builder in certain circumstances.
+        // I don't think it should be necessary.
+        return binder2nd<Operation>((typename binary_traits<Operation>::param_type)op, x);
+    }
+
+    template <class Operation>
+    inline binder2nd<Operation> bind2nd(Operation &op,
+                                        typename call_traits<
+                                                    typename binary_traits<Operation>::second_argument_type
+                                        >::param_type x)
+    {
+        return binder2nd<Operation>(op, x);
+    }
+
+    // --------------------------------------------------------------------------
+    // mem_fun, etc
+    // --------------------------------------------------------------------------
+    template <class S, class T>
+    class mem_fun_t : public std::unary_function<T*, S>
+    {
+      public:
+        explicit mem_fun_t(S (T::*p)())
+            :
+            ptr(p)
+        {}
+        S operator()(T* p) const
+        {
+            return (p->*ptr)();
+        }
+      private:
+        S (T::*ptr)();
+    };
+
+    template <class S, class T, class A>
+    class mem_fun1_t : public std::binary_function<T*, A, S>
+    {
+      public:   
+        explicit mem_fun1_t(S (T::*p)(A))
+            :
+            ptr(p)
+        {}
+        S operator()(T* p, typename call_traits<A>::param_type x) const
+        {
+            return (p->*ptr)(x);
+        }
+      private:
+        S (T::*ptr)(A);
+    };
+
+    template <class S, class T>
+    class const_mem_fun_t : public std::unary_function<const T*, S>
+    {
+      public:
+        explicit const_mem_fun_t(S (T::*p)() const)
+            :
+            ptr(p)
+        {}
+        S operator()(const T* p) const
+        {
+            return (p->*ptr)();
+        }
+      private:
+        S (T::*ptr)() const;        
+    };
+
+    template <class S, class T, class A>
+    class const_mem_fun1_t : public std::binary_function<const T*, A, S>
+    {
+      public:
+        explicit const_mem_fun1_t(S (T::*p)(A) const)
+            :
+            ptr(p)
+        {}
+        S operator()(const T* p, typename call_traits<A>::param_type x) const
+        {
+            return (p->*ptr)(x);
+        }
+      private:
+        S (T::*ptr)(A) const;
+    };
+    
+    template<class S, class T>
+    inline mem_fun_t<S,T> mem_fun(S (T::*f)())
+    {
+        return mem_fun_t<S,T>(f);
+    }
+    
+    template<class S, class T, class A>
+    inline mem_fun1_t<S,T,A> mem_fun(S (T::*f)(A))
+    {
+        return mem_fun1_t<S,T,A>(f);
+    }
+
+#ifndef BOOST_NO_POINTER_TO_MEMBER_CONST
+    template<class S, class T>
+    inline const_mem_fun_t<S,T> mem_fun(S (T::*f)() const)
+    {
+        return const_mem_fun_t<S,T>(f);
+    }
+    
+    template<class S, class T, class A>
+    inline const_mem_fun1_t<S,T,A> mem_fun(S (T::*f)(A) const)
+    {
+        return const_mem_fun1_t<S,T,A>(f);
+    }
+#endif // BOOST_NO_POINTER_TO_MEMBER_CONST
+
+    // --------------------------------------------------------------------------
+    // mem_fun_ref, etc
+    // --------------------------------------------------------------------------
+    template <class S, class T>
+    class mem_fun_ref_t : public std::unary_function<T&, S>
+    {
+      public:
+        explicit mem_fun_ref_t(S (T::*p)())
+            :
+            ptr(p)
+        {}
+        S operator()(T& p) const
+        {
+            return (p.*ptr)();
+        }
+      private:
+        S (T::*ptr)();
+    };
+
+    template <class S, class T, class A>
+    class mem_fun1_ref_t : public std::binary_function<T&, A, S>
+    {
+      public:
+        explicit mem_fun1_ref_t(S (T::*p)(A))
+            :
+            ptr(p)
+        {}
+        S operator()(T& p, typename call_traits<A>::param_type x) const
+        {
+            return (p.*ptr)(x);
+        }
+      private:
+        S (T::*ptr)(A);
+    };
+    
+    template <class S, class T>
+    class const_mem_fun_ref_t : public std::unary_function<const T&, S>
+    {
+      public:
+        explicit const_mem_fun_ref_t(S (T::*p)() const)
+            :
+            ptr(p)
+        {}
+        
+        S operator()(const T &p) const
+        {
+            return (p.*ptr)();
+        }
+      private:
+        S (T::*ptr)() const;
+    };
+
+    template <class S, class T, class A>
+    class const_mem_fun1_ref_t : public std::binary_function<const T&, A, S>
+    {
+      public:
+        explicit const_mem_fun1_ref_t(S (T::*p)(A) const)
+            :
+            ptr(p)
+        {}
+
+        S operator()(const T& p, typename call_traits<A>::param_type x) const
+        {
+            return (p.*ptr)(x);
+        }
+      private:
+        S (T::*ptr)(A) const;
+    };
+    
+    template<class S, class T>
+    inline mem_fun_ref_t<S,T> mem_fun_ref(S (T::*f)())
+    {
+        return mem_fun_ref_t<S,T>(f);
+    }
+
+    template<class S, class T, class A>
+    inline mem_fun1_ref_t<S,T,A> mem_fun_ref(S (T::*f)(A))
+    {
+        return mem_fun1_ref_t<S,T,A>(f);
+    }
+
+#ifndef BOOST_NO_POINTER_TO_MEMBER_CONST
+    template<class S, class T>
+    inline const_mem_fun_ref_t<S,T> mem_fun_ref(S (T::*f)() const)
+    {
+        return const_mem_fun_ref_t<S,T>(f);
+    }
+
+    template<class S, class T, class A>
+    inline const_mem_fun1_ref_t<S,T,A> mem_fun_ref(S (T::*f)(A) const)
+    {
+        return const_mem_fun1_ref_t<S,T,A>(f);
+    }   
+#endif // BOOST_NO_POINTER_TO_MEMBER_CONST
+
+    // --------------------------------------------------------------------------
+    // ptr_fun
+    // --------------------------------------------------------------------------
+    template <class Arg, class Result>
+    class pointer_to_unary_function : public std::unary_function<Arg,Result>
+    {
+      public:
+        explicit pointer_to_unary_function(Result (*f)(Arg))
+            :
+            func(f)
+        {}
+
+        Result operator()(typename call_traits<Arg>::param_type x) const
+        {
+            return func(x);
+        }
+        
+      private:
+        Result (*func)(Arg);
+    };
+
+    template <class Arg, class Result>
+    inline pointer_to_unary_function<Arg,Result> ptr_fun(Result (*f)(Arg))
+    {
+        return pointer_to_unary_function<Arg,Result>(f);
+    }
+
+    template <class Arg1, class Arg2, class Result>
+    class pointer_to_binary_function : public std::binary_function<Arg1,Arg2,Result>
+    {
+      public:
+        explicit pointer_to_binary_function(Result (*f)(Arg1, Arg2))
+            :
+            func(f)
+        {}
+        
+        Result operator()(typename call_traits<Arg1>::param_type x, typename call_traits<Arg2>::param_type y) const
+        {
+            return func(x,y);
+        }
+        
+      private:
+        Result (*func)(Arg1, Arg2);
+    };
+
+    template <class Arg1, class Arg2, class Result>
+    inline pointer_to_binary_function<Arg1,Arg2,Result> ptr_fun(Result (*f)(Arg1, Arg2))
+    {
+        return pointer_to_binary_function<Arg1,Arg2,Result>(f);
+    }
+} // namespace ndnboost
+
+#endif