diff --git a/ndnboost/unordered/detail/allocate.hpp b/ndnboost/unordered/detail/allocate.hpp
new file mode 100644
index 0000000..4ad6724
--- /dev/null
+++ b/ndnboost/unordered/detail/allocate.hpp
@@ -0,0 +1,1120 @@
+
+// Copyright 2005-2011 Daniel James.
+// Copyright 2009 Pablo Halpern.
+// 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/unordered for documentation
+
+#ifndef BOOST_UNORDERED_ALLOCATE_HPP
+#define BOOST_UNORDERED_ALLOCATE_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <ndnboost/unordered/detail/fwd.hpp>
+#include <ndnboost/move/move.hpp>
+#include <ndnboost/preprocessor/cat.hpp>
+#include <ndnboost/preprocessor/inc.hpp>
+#include <ndnboost/preprocessor/dec.hpp>
+#include <ndnboost/preprocessor/repetition/enum.hpp>
+#include <ndnboost/preprocessor/repetition/enum_params.hpp>
+#include <ndnboost/preprocessor/repetition/enum_binary_params.hpp>
+#include <ndnboost/preprocessor/repetition/repeat_from_to.hpp>
+#include <ndnboost/type_traits/is_class.hpp>
+#include <ndnboost/type_traits/add_lvalue_reference.hpp>
+#include <ndnboost/tuple/tuple.hpp>
+#include <ndnboost/utility/enable_if.hpp>
+#include <ndnboost/utility/addressof.hpp>
+#include <ndnboost/detail/select_type.hpp>
+#include <ndnboost/assert.hpp>
+#include <utility>
+
+#if !defined(BOOST_NO_CXX11_HDR_TUPLE)
+#include <tuple>
+#endif
+
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+#pragma warning(disable:4512) // assignment operator could not be generated.
+#pragma warning(disable:4345) // behavior change: an object of POD type
+                              // constructed with an initializer of the form ()
+                              // will be default-initialized.
+#endif
+
+#define BOOST_UNORDERED_EMPLACE_LIMIT 10
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Bits and pieces for implementing traits
+
+    template <typename T> typename ndnboost::add_lvalue_reference<T>::type make();
+    struct choice9 { typedef char (&type)[9]; };
+    struct choice8 : choice9 { typedef char (&type)[8]; };
+    struct choice7 : choice8 { typedef char (&type)[7]; };
+    struct choice6 : choice7 { typedef char (&type)[6]; };
+    struct choice5 : choice6 { typedef char (&type)[5]; };
+    struct choice4 : choice5 { typedef char (&type)[4]; };
+    struct choice3 : choice4 { typedef char (&type)[3]; };
+    struct choice2 : choice3 { typedef char (&type)[2]; };
+    struct choice1 : choice2 { typedef char (&type)[1]; };
+    choice1 choose();
+
+    typedef choice1::type yes_type;
+    typedef choice2::type no_type;
+
+    struct private_type
+    {
+       private_type const &operator,(int) const;
+    };
+
+    template <typename T>
+    no_type is_private_type(T const&);
+    yes_type is_private_type(private_type const&);
+
+    struct convert_from_anything {
+        template <typename T>
+        convert_from_anything(T const&);
+    };
+
+    ////////////////////////////////////////////////////////////////////////////
+    // emplace_args
+    //
+    // Either forwarding variadic arguments, or storing the arguments in
+    // emplace_args##n
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+#define BOOST_UNORDERED_EMPLACE_TEMPLATE typename... Args
+#define BOOST_UNORDERED_EMPLACE_ARGS BOOST_FWD_REF(Args)... args
+#define BOOST_UNORDERED_EMPLACE_FORWARD ndnboost::forward<Args>(args)...
+
+#define BOOST_UNORDERED_EMPLACE_ARGS1(a0) a0
+#define BOOST_UNORDERED_EMPLACE_ARGS2(a0, a1) a0, a1
+#define BOOST_UNORDERED_EMPLACE_ARGS3(a0, a1, a2) a0, a1, a2
+
+#else
+
+#define BOOST_UNORDERED_EMPLACE_TEMPLATE typename Args
+#define BOOST_UNORDERED_EMPLACE_ARGS Args const& args
+#define BOOST_UNORDERED_EMPLACE_FORWARD args
+
+#define BOOST_UNORDERED_FWD_PARAM(z, n, a) \
+    BOOST_FWD_REF(BOOST_PP_CAT(A, n)) BOOST_PP_CAT(a, n)
+
+#define BOOST_UNORDERED_CALL_FORWARD(z, i, a) \
+    ndnboost::forward<BOOST_PP_CAT(A,i)>(BOOST_PP_CAT(a,i))
+
+#define BOOST_UNORDERED_EARGS(z, n, _)                                      \
+    template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)>                     \
+    struct BOOST_PP_CAT(emplace_args, n)                                    \
+    {                                                                       \
+        BOOST_PP_REPEAT_##z(n, BOOST_UNORDERED_EARGS_MEMBER, _)             \
+        BOOST_PP_CAT(emplace_args, n) (                                     \
+            BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, Arg, b)                     \
+        ) : BOOST_PP_ENUM_##z(n, BOOST_UNORDERED_EARGS_INIT, _)             \
+        {}                                                                  \
+                                                                            \
+    };                                                                      \
+                                                                            \
+    template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)>                     \
+    inline BOOST_PP_CAT(emplace_args, n) <                                  \
+        BOOST_PP_ENUM_PARAMS_Z(z, n, A)                                     \
+    > create_emplace_args(                                                  \
+        BOOST_PP_ENUM_##z(n, BOOST_UNORDERED_FWD_PARAM, b)                  \
+    )                                                                       \
+    {                                                                       \
+        BOOST_PP_CAT(emplace_args, n) <                                     \
+            BOOST_PP_ENUM_PARAMS_Z(z, n, A)                                 \
+        > e(BOOST_PP_ENUM_PARAMS_Z(z, n, b));                               \
+        return e;                                                           \
+    }
+
+#define BOOST_UNORDERED_EMPLACE_ARGS1 create_emplace_args
+#define BOOST_UNORDERED_EMPLACE_ARGS2 create_emplace_args
+#define BOOST_UNORDERED_EMPLACE_ARGS3 create_emplace_args
+
+#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
+
+#define BOOST_UNORDERED_EARGS_MEMBER(z, n, _)                               \
+    typedef BOOST_FWD_REF(BOOST_PP_CAT(A, n)) BOOST_PP_CAT(Arg, n);         \
+    BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(a, n);
+
+#define BOOST_UNORDERED_EARGS_INIT(z, n, _)                                 \
+    BOOST_PP_CAT(a, n)(                                                     \
+        ndnboost::forward<BOOST_PP_CAT(A,n)>(BOOST_PP_CAT(b, n)))
+
+#else
+
+#define BOOST_UNORDERED_EARGS_MEMBER(z, n, _)                               \
+    typedef typename ndnboost::add_lvalue_reference<BOOST_PP_CAT(A, n)>::type  \
+        BOOST_PP_CAT(Arg, n);                                               \
+    BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(a, n);
+
+#define BOOST_UNORDERED_EARGS_INIT(z, n, _)                                 \
+    BOOST_PP_CAT(a, n)(BOOST_PP_CAT(b, n))
+
+#endif
+
+BOOST_PP_REPEAT_FROM_TO(1, BOOST_UNORDERED_EMPLACE_LIMIT, BOOST_UNORDERED_EARGS,
+    _)
+
+#undef BOOST_UNORDERED_DEFINE_EMPLACE_ARGS
+#undef BOOST_UNORDERED_EARGS_MEMBER
+#undef BOOST_UNORDERED_EARGS_INIT
+
+#endif
+
+}}}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Pick which version of allocator_traits to use
+//
+// 0 = Own partial implementation
+// 1 = std::allocator_traits
+// 2 = ndnboost::container::allocator_traits
+
+#if !defined(BOOST_UNORDERED_USE_ALLOCATOR_TRAITS)
+#   if defined(__GXX_EXPERIMENTAL_CXX0X__) && \
+            (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7))
+#       define BOOST_UNORDERED_USE_ALLOCATOR_TRAITS 0
+#   elif defined(BOOST_MSVC)
+#       if BOOST_MSVC < 1400
+            // Use container's allocator_traits for older versions of Visual
+            // C++ as I don't test with them.
+#           define BOOST_UNORDERED_USE_ALLOCATOR_TRAITS 2
+#       endif
+#   endif
+#endif
+
+#if !defined(BOOST_UNORDERED_USE_ALLOCATOR_TRAITS)
+#   define BOOST_UNORDERED_USE_ALLOCATOR_TRAITS 0
+#endif
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Some utilities for implementing allocator_traits, but useful elsewhere so
+// they're always defined.
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+#  include <type_traits>
+#endif
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Integral_constrant, true_type, false_type
+    //
+    // Uses the standard versions if available.
+
+#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
+
+    using std::integral_constant;
+    using std::true_type;
+    using std::false_type;
+
+#else
+
+    template <typename T, T Value>
+    struct integral_constant { enum { value = Value }; };
+
+    typedef ndnboost::unordered::detail::integral_constant<bool, true> true_type;
+    typedef ndnboost::unordered::detail::integral_constant<bool, false> false_type;
+
+#endif
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Explicitly call a destructor
+
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+#pragma warning(disable:4100) // unreferenced formal parameter
+#endif
+
+    template <class T>
+    inline void destroy(T* x) {
+        x->~T();
+    }
+
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Expression test mechanism
+    //
+    // When SFINAE expressions are available, define
+    // BOOST_UNORDERED_HAS_FUNCTION which can check if a function call is
+    // supported by a class, otherwise define BOOST_UNORDERED_HAS_MEMBER which
+    // can detect if a class has the specified member, but not that it has the
+    // correct type, this is good enough for a passable impression of
+    // allocator_traits.
+
+#if !defined(BOOST_NO_SFINAE_EXPR)
+
+    template <typename T, unsigned int> struct expr_test;
+    template <typename T> struct expr_test<T, sizeof(char)> : T {};
+    template <typename U> static char for_expr_test(U const&);
+
+#   define BOOST_UNORDERED_CHECK_EXPRESSION(count, result, expression)      \
+        template <typename U>                                               \
+        static typename ndnboost::unordered::detail::expr_test<                \
+            BOOST_PP_CAT(choice, result),                                   \
+            sizeof(ndnboost::unordered::detail::for_expr_test((                \
+                (expression),                                               \
+            0)))>::type test(                                               \
+            BOOST_PP_CAT(choice, count))
+
+#   define BOOST_UNORDERED_DEFAULT_EXPRESSION(count, result)                \
+        template <typename U>                                               \
+        static BOOST_PP_CAT(choice, result)::type test(                     \
+            BOOST_PP_CAT(choice, count))
+
+#   define BOOST_UNORDERED_HAS_FUNCTION(name, thing, args, _)               \
+    struct BOOST_PP_CAT(has_, name)                                         \
+    {                                                                       \
+        BOOST_UNORDERED_CHECK_EXPRESSION(1, 1,                              \
+            ndnboost::unordered::detail::make< thing >().name args);           \
+        BOOST_UNORDERED_DEFAULT_EXPRESSION(2, 2);                           \
+                                                                            \
+        enum { value = sizeof(test<T>(choose())) == sizeof(choice1::type) };\
+    }
+
+#else
+
+    template <typename T> struct identity { typedef T type; };
+
+#   define BOOST_UNORDERED_CHECK_MEMBER(count, result, name, member)        \
+                                                                            \
+    typedef typename ndnboost::unordered::detail::identity<member>::type       \
+        BOOST_PP_CAT(check, count);                                         \
+                                                                            \
+    template <BOOST_PP_CAT(check, count) e>                                 \
+    struct BOOST_PP_CAT(test, count) {                                      \
+        typedef BOOST_PP_CAT(choice, result) type;                          \
+    };                                                                      \
+                                                                            \
+    template <class U> static typename                                      \
+        BOOST_PP_CAT(test, count)<&U::name>::type                           \
+        test(BOOST_PP_CAT(choice, count))
+
+#   define BOOST_UNORDERED_DEFAULT_MEMBER(count, result)                    \
+    template <class U> static BOOST_PP_CAT(choice, result)::type            \
+        test(BOOST_PP_CAT(choice, count))
+
+#   define BOOST_UNORDERED_HAS_MEMBER(name)                                 \
+    struct BOOST_PP_CAT(has_, name)                                         \
+    {                                                                       \
+        struct impl {                                                       \
+            struct base_mixin { int name; };                                \
+            struct base : public T, public base_mixin {};                   \
+                                                                            \
+            BOOST_UNORDERED_CHECK_MEMBER(1, 1, name, int base_mixin::*);    \
+            BOOST_UNORDERED_DEFAULT_MEMBER(2, 2);                           \
+                                                                            \
+            enum { value = sizeof(choice2::type) ==                         \
+                sizeof(test<base>(choose()))                                \
+            };                                                              \
+        };                                                                  \
+                                                                            \
+        enum { value = impl::value };                                       \
+    }
+
+#endif
+
+}}}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Allocator traits
+//
+// First our implementation, then later light wrappers around the alternatives
+
+#if BOOST_UNORDERED_USE_ALLOCATOR_TRAITS == 0
+
+#   include <ndnboost/limits.hpp>
+#   include <ndnboost/utility/enable_if.hpp>
+#   include <ndnboost/pointer_to_other.hpp>
+#   if defined(BOOST_NO_SFINAE_EXPR)
+#       include <ndnboost/type_traits/is_same.hpp>
+#   endif
+
+#   if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
+        !defined(BOOST_NO_SFINAE_EXPR)
+#       define BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT 1
+#   else
+#       define BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT 0
+#   endif
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    // TODO: Does this match std::allocator_traits<Alloc>::rebind_alloc<T>?
+    template <typename Alloc, typename T>
+    struct rebind_wrap
+    {
+        typedef typename Alloc::BOOST_NESTED_TEMPLATE rebind<T>::other type;
+    };
+
+#   if defined(BOOST_MSVC) && BOOST_MSVC <= 1400
+
+#       define BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(tname)                    \
+    template <typename Tp, typename Default>                                \
+    struct default_type_ ## tname {                                         \
+                                                                            \
+        template <typename X>                                               \
+        static choice1::type test(choice1, typename X::tname* = 0);         \
+                                                                            \
+        template <typename X>                                               \
+        static choice2::type test(choice2, void* = 0);                      \
+                                                                            \
+        struct DefaultWrap { typedef Default tname; };                      \
+                                                                            \
+        enum { value = (1 == sizeof(test<Tp>(choose()))) };                 \
+                                                                            \
+        typedef typename ndnboost::detail::if_true<value>::                    \
+            BOOST_NESTED_TEMPLATE then<Tp, DefaultWrap>                     \
+            ::type::tname type;                                             \
+    }
+
+#   else
+
+    template <typename T, typename T2>
+    struct sfinae : T2 {};
+
+#       define BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(tname)                    \
+    template <typename Tp, typename Default>                                \
+    struct default_type_ ## tname {                                         \
+                                                                            \
+        template <typename X>                                               \
+        static typename ndnboost::unordered::detail::sfinae<                   \
+                typename X::tname, choice1>::type                           \
+            test(choice1);                                                  \
+                                                                            \
+        template <typename X>                                               \
+        static choice2::type test(choice2);                                 \
+                                                                            \
+        struct DefaultWrap { typedef Default tname; };                      \
+                                                                            \
+        enum { value = (1 == sizeof(test<Tp>(choose()))) };                 \
+                                                                            \
+        typedef typename ndnboost::detail::if_true<value>::                    \
+            BOOST_NESTED_TEMPLATE then<Tp, DefaultWrap>                     \
+            ::type::tname type;                                             \
+    }
+
+#   endif
+
+#   define BOOST_UNORDERED_DEFAULT_TYPE(T,tname, arg)                   \
+    typename default_type_ ## tname<T, arg>::type
+
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(pointer);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(const_pointer);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(void_pointer);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(const_void_pointer);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(difference_type);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(size_type);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(propagate_on_container_copy_assignment);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(propagate_on_container_move_assignment);
+    BOOST_UNORDERED_DEFAULT_TYPE_TMPLT(propagate_on_container_swap);
+
+#   if !defined(BOOST_NO_SFINAE_EXPR)
+
+    template <typename T>
+    BOOST_UNORDERED_HAS_FUNCTION(
+        select_on_container_copy_construction, U const, (), 0
+    );
+
+    template <typename T>
+    BOOST_UNORDERED_HAS_FUNCTION(
+        max_size, U const, (), 0
+    );
+
+#       if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+    template <typename T, typename ValueType, typename... Args>
+    BOOST_UNORDERED_HAS_FUNCTION(
+    construct, U, (
+        ndnboost::unordered::detail::make<ValueType*>(),
+        ndnboost::unordered::detail::make<Args const>()...), 2
+    );
+
+#       else
+
+    template <typename T, typename ValueType>
+    BOOST_UNORDERED_HAS_FUNCTION(
+    construct, U, (
+        ndnboost::unordered::detail::make<ValueType*>(),
+        ndnboost::unordered::detail::make<ValueType const>()), 2
+    );
+
+#       endif
+
+    template <typename T, typename ValueType>
+    BOOST_UNORDERED_HAS_FUNCTION(
+        destroy, U, (ndnboost::unordered::detail::make<ValueType*>()), 1
+    );
+
+#   else
+
+    template <typename T>
+    BOOST_UNORDERED_HAS_MEMBER(select_on_container_copy_construction);
+
+    template <typename T>
+    BOOST_UNORDERED_HAS_MEMBER(max_size);
+
+    template <typename T, typename ValueType>
+    BOOST_UNORDERED_HAS_MEMBER(construct);
+
+    template <typename T, typename ValueType>
+    BOOST_UNORDERED_HAS_MEMBER(destroy);
+
+#   endif
+
+    template <typename Alloc>
+    inline Alloc call_select_on_container_copy_construction(const Alloc& rhs,
+        typename ndnboost::enable_if_c<
+            ndnboost::unordered::detail::
+            has_select_on_container_copy_construction<Alloc>::value, void*
+        >::type = 0)
+    {
+        return rhs.select_on_container_copy_construction();
+    }
+
+    template <typename Alloc>
+    inline Alloc call_select_on_container_copy_construction(const Alloc& rhs,
+        typename ndnboost::disable_if_c<
+            ndnboost::unordered::detail::
+            has_select_on_container_copy_construction<Alloc>::value, void*
+        >::type = 0)
+    {
+        return rhs;
+    }
+
+    template <typename SizeType, typename Alloc>
+    inline SizeType call_max_size(const Alloc& a,
+        typename ndnboost::enable_if_c<
+            ndnboost::unordered::detail::has_max_size<Alloc>::value, void*
+        >::type = 0)
+    {
+        return a.max_size();
+    }
+
+    template <typename SizeType, typename Alloc>
+    inline SizeType call_max_size(const Alloc&, typename ndnboost::disable_if_c<
+            ndnboost::unordered::detail::has_max_size<Alloc>::value, void*
+        >::type = 0)
+    {
+        return (std::numeric_limits<SizeType>::max)();
+    }
+
+    template <typename Alloc>
+    struct allocator_traits
+    {
+        typedef Alloc allocator_type;
+        typedef typename Alloc::value_type value_type;
+
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(Alloc, pointer, value_type*)
+            pointer;
+
+        template <typename T>
+        struct pointer_to_other : ndnboost::pointer_to_other<pointer, T> {};
+
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(Alloc, const_pointer,
+            typename pointer_to_other<const value_type>::type)
+            const_pointer;
+
+        //typedef BOOST_UNORDERED_DEFAULT_TYPE(Alloc, void_pointer,
+        //    typename pointer_to_other<void>::type)
+        //    void_pointer;
+        //
+        //typedef BOOST_UNORDERED_DEFAULT_TYPE(Alloc, const_void_pointer,
+        //    typename pointer_to_other<const void>::type)
+        //    const_void_pointer;
+
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(Alloc, difference_type,
+            std::ptrdiff_t) difference_type;
+
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(Alloc, size_type, std::size_t)
+            size_type;
+
+        // TODO: rebind_alloc and rebind_traits
+
+        static pointer allocate(Alloc& a, size_type n)
+            { return a.allocate(n); }
+
+        // I never use this, so I'll just comment it out for now.
+        //
+        //static pointer allocate(Alloc& a, size_type n,
+        //        const_void_pointer hint)
+        //    { return DEFAULT_FUNC(allocate, pointer)(a, n, hint); }
+
+        static void deallocate(Alloc& a, pointer p, size_type n)
+            { a.deallocate(p, n); }
+
+    public:
+
+#   if BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT
+
+        template <typename T, typename... Args>
+        static typename ndnboost::enable_if_c<
+                ndnboost::unordered::detail::has_construct<Alloc, T, Args...>
+                ::value>::type
+            construct(Alloc& a, T* p, BOOST_FWD_REF(Args)... x)
+        {
+            a.construct(p, ndnboost::forward<Args>(x)...);
+        }
+
+        template <typename T, typename... Args>
+        static typename ndnboost::disable_if_c<
+                ndnboost::unordered::detail::has_construct<Alloc, T, Args...>
+                ::value>::type
+            construct(Alloc&, T* p, BOOST_FWD_REF(Args)... x)
+        {
+            new ((void*) p) T(ndnboost::forward<Args>(x)...);
+        }
+
+        template <typename T>
+        static typename ndnboost::enable_if_c<
+                ndnboost::unordered::detail::has_destroy<Alloc, T>::value>::type
+            destroy(Alloc& a, T* p)
+        {
+            a.destroy(p);
+        }
+
+        template <typename T>
+        static typename ndnboost::disable_if_c<
+                ndnboost::unordered::detail::has_destroy<Alloc, T>::value>::type
+            destroy(Alloc&, T* p)
+        {
+            ndnboost::unordered::detail::destroy(p);
+        }
+
+#   elif !defined(BOOST_NO_SFINAE_EXPR)
+
+        template <typename T>
+        static typename ndnboost::enable_if_c<
+                ndnboost::unordered::detail::has_construct<Alloc, T>::value>::type
+            construct(Alloc& a, T* p, T const& x)
+        {
+            a.construct(p, x);
+        }
+
+        template <typename T>
+        static typename ndnboost::disable_if_c<
+                ndnboost::unordered::detail::has_construct<Alloc, T>::value>::type
+            construct(Alloc&, T* p, T const& x)
+        {
+            new ((void*) p) T(x);
+        }
+
+        template <typename T>
+        static typename ndnboost::enable_if_c<
+                ndnboost::unordered::detail::has_destroy<Alloc, T>::value>::type
+            destroy(Alloc& a, T* p)
+        {
+            a.destroy(p);
+        }
+
+        template <typename T>
+        static typename ndnboost::disable_if_c<
+                ndnboost::unordered::detail::has_destroy<Alloc, T>::value>::type
+            destroy(Alloc&, T* p)
+        {
+            ndnboost::unordered::detail::destroy(p);
+        }
+
+#   else
+
+        // If we don't have SFINAE expressions, only call construct for the
+        // copy constructor for the allocator's value_type - as that's
+        // the only construct method that old fashioned allocators support.
+
+        template <typename T>
+        static void construct(Alloc& a, T* p, T const& x,
+            typename ndnboost::enable_if_c<
+                    ndnboost::unordered::detail::has_construct<Alloc, T>::value &&
+                    ndnboost::is_same<T, value_type>::value,
+                    void*>::type = 0)
+        {
+            a.construct(p, x);
+        }
+
+        template <typename T>
+        static void construct(Alloc&, T* p, T const& x,
+            typename ndnboost::disable_if_c<
+                ndnboost::unordered::detail::has_construct<Alloc, T>::value &&
+                ndnboost::is_same<T, value_type>::value,
+                void*>::type = 0)
+        {
+            new ((void*) p) T(x);
+        }
+
+        template <typename T>
+        static void destroy(Alloc& a, T* p,
+            typename ndnboost::enable_if_c<
+                ndnboost::unordered::detail::has_destroy<Alloc, T>::value &&
+                ndnboost::is_same<T, value_type>::value,
+                void*>::type = 0)
+        {
+            a.destroy(p);
+        }
+
+        template <typename T>
+        static void destroy(Alloc&, T* p,
+            typename ndnboost::disable_if_c<
+                ndnboost::unordered::detail::has_destroy<Alloc, T>::value &&
+                ndnboost::is_same<T, value_type>::value,
+                void*>::type = 0)
+        {
+            ndnboost::unordered::detail::destroy(p);
+        }
+
+#   endif
+
+        static size_type max_size(const Alloc& a)
+        {
+            return ndnboost::unordered::detail::call_max_size<size_type>(a);
+        }
+
+        // Allocator propagation on construction
+
+        static Alloc select_on_container_copy_construction(Alloc const& rhs)
+        {
+            return ndnboost::unordered::detail::
+                call_select_on_container_copy_construction(rhs);
+        }
+
+        // Allocator propagation on assignment and swap.
+        // Return true if lhs is modified.
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(
+            Alloc, propagate_on_container_copy_assignment, false_type)
+            propagate_on_container_copy_assignment;
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(
+            Alloc,propagate_on_container_move_assignment, false_type)
+            propagate_on_container_move_assignment;
+        typedef BOOST_UNORDERED_DEFAULT_TYPE(
+            Alloc,propagate_on_container_swap,false_type)
+            propagate_on_container_swap;
+    };
+}}}
+
+#   undef BOOST_UNORDERED_DEFAULT_TYPE_TMPLT
+#   undef BOOST_UNORDERED_DEFAULT_TYPE
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// std::allocator_traits
+
+#elif BOOST_UNORDERED_USE_ALLOCATOR_TRAITS == 1
+
+#   include <memory>
+
+#   define BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT 1
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    template <typename Alloc>
+    struct allocator_traits : std::allocator_traits<Alloc> {};
+
+    template <typename Alloc, typename T>
+    struct rebind_wrap
+    {
+        typedef typename std::allocator_traits<Alloc>::
+            template rebind_alloc<T> type;
+    };
+}}}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// ndnboost::container::allocator_traits
+
+#elif BOOST_UNORDERED_USE_ALLOCATOR_TRAITS == 2
+
+#   include <ndnboost/container/allocator_traits.hpp>
+
+#   define BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT 0
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    template <typename Alloc>
+    struct allocator_traits :
+        ndnboost::container::allocator_traits<Alloc> {};
+
+    template <typename Alloc, typename T>
+    struct rebind_wrap :
+        ndnboost::container::allocator_traits<Alloc>::
+            template portable_rebind_alloc<T>
+    {};
+
+}}}
+
+#else
+
+#error "Invalid BOOST_UNORDERED_USE_ALLOCATOR_TRAITS value."
+
+#endif
+
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    ////////////////////////////////////////////////////////////////////////////
+    // call_construct
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+#   if BOOST_UNORDERED_DETAIL_FULL_CONSTRUCT
+
+    template <typename Alloc, typename T, typename... Args>
+    inline void call_construct(Alloc& alloc, T* address,
+        BOOST_FWD_REF(Args)... args)
+    {
+        ndnboost::unordered::detail::allocator_traits<Alloc>::construct(alloc,
+            address, ndnboost::forward<Args>(args)...);
+    }
+
+    template <typename Alloc, typename T>
+    inline void destroy_value_impl(Alloc& alloc, T* x) {
+        ndnboost::unordered::detail::allocator_traits<Alloc>::destroy(alloc, x);
+    }
+
+
+#   else
+
+    template <typename Alloc, typename T, typename... Args>
+    inline void call_construct(Alloc&, T* address,
+        BOOST_FWD_REF(Args)... args)
+    {
+        new((void*) address) T(ndnboost::forward<Args>(args)...);
+    }
+
+    template <typename Alloc, typename T>
+    inline void destroy_value_impl(Alloc&, T* x) {
+        ndnboost::unordered::detail::destroy(x);
+    }
+
+
+#   endif
+
+#else
+
+    template <typename Alloc, typename T>
+    inline void destroy_value_impl(Alloc&, T* x) {
+        ndnboost::unordered::detail::destroy(x);
+    }
+
+#endif
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Construct from tuple
+    //
+    // Used for piecewise construction.
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+#   define BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE(n, namespace_)              \
+    template<typename Alloc, typename T>                                    \
+    void construct_from_tuple(Alloc& alloc, T* ptr, namespace_ tuple<>)     \
+    {                                                                       \
+        ndnboost::unordered::detail::call_construct(alloc, ptr);               \
+    }                                                                       \
+                                                                            \
+    BOOST_PP_REPEAT_FROM_TO(1, n,                                           \
+        BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL, namespace_)
+
+#   define BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL(z, n, namespace_)      \
+    template<typename Alloc, typename T,                                    \
+        BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)>                           \
+    void construct_from_tuple(Alloc& alloc, T* ptr,                         \
+            namespace_ tuple<BOOST_PP_ENUM_PARAMS_Z(z, n, A)> const& x)     \
+    {                                                                       \
+        ndnboost::unordered::detail::call_construct(alloc, ptr,                \
+            BOOST_PP_ENUM_##z(n, BOOST_UNORDERED_GET_TUPLE_ARG, namespace_) \
+        );                                                                  \
+    }
+
+#   define BOOST_UNORDERED_GET_TUPLE_ARG(z, n, namespace_)                  \
+    namespace_ get<n>(x)
+
+#elif !defined(__SUNPRO_CC)
+
+#   define BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE(n, namespace_)              \
+    template<typename Alloc, typename T>                                    \
+    void construct_from_tuple(Alloc&, T* ptr, namespace_ tuple<>)           \
+    {                                                                       \
+        new ((void*) ptr) T();                                              \
+    }                                                                       \
+                                                                            \
+    BOOST_PP_REPEAT_FROM_TO(1, n,                                           \
+        BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL, namespace_)
+
+#   define BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL(z, n, namespace_)      \
+    template<typename Alloc, typename T,                                    \
+        BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)>                           \
+    void construct_from_tuple(Alloc&, T* ptr,                               \
+            namespace_ tuple<BOOST_PP_ENUM_PARAMS_Z(z, n, A)> const& x)     \
+    {                                                                       \
+        new ((void*) ptr) T(                                                \
+            BOOST_PP_ENUM_##z(n, BOOST_UNORDERED_GET_TUPLE_ARG, namespace_) \
+        );                                                                  \
+    }
+
+#   define BOOST_UNORDERED_GET_TUPLE_ARG(z, n, namespace_)                  \
+    namespace_ get<n>(x)
+
+#else
+
+    template <int N> struct length {};
+
+#   define BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE(n, namespace_)              \
+    template<typename Alloc, typename T>                                    \
+    void construct_from_tuple_impl(                                         \
+            ndnboost::unordered::detail::length<0>, Alloc&, T* ptr,            \
+            namespace_ tuple<>)                                             \
+    {                                                                       \
+        new ((void*) ptr) T();                                              \
+    }                                                                       \
+                                                                            \
+    BOOST_PP_REPEAT_FROM_TO(1, n,                                           \
+        BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL, namespace_)
+
+#   define BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL(z, n, namespace_)      \
+    template<typename Alloc, typename T,                                    \
+        BOOST_PP_ENUM_PARAMS_Z(z, n, typename A)>                           \
+    void construct_from_tuple_impl(                                         \
+            ndnboost::unordered::detail::length<n>, Alloc&, T* ptr,            \
+            namespace_ tuple<BOOST_PP_ENUM_PARAMS_Z(z, n, A)> const& x)     \
+    {                                                                       \
+        new ((void*) ptr) T(                                                \
+            BOOST_PP_ENUM_##z(n, BOOST_UNORDERED_GET_TUPLE_ARG, namespace_) \
+        );                                                                  \
+    }
+
+#   define BOOST_UNORDERED_GET_TUPLE_ARG(z, n, namespace_)                  \
+    namespace_ get<n>(x)
+
+#endif
+
+BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE(10, ndnboost::)
+
+#if !defined(__SUNPRO_CC) && !defined(BOOST_NO_CXX11_HDR_TUPLE)
+   BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE(10, std::)
+#endif
+
+#undef BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE
+#undef BOOST_UNORDERED_CONSTRUCT_FROM_TUPLE_IMPL
+#undef BOOST_UNORDERED_GET_TUPLE_ARG
+
+#if defined(__SUNPRO_CC)
+
+    template <typename Alloc, typename T, typename Tuple>
+    void construct_from_tuple(Alloc& alloc, T* ptr, Tuple const& x)
+    {
+        construct_from_tuple_impl(
+            ndnboost::unordered::detail::length<
+                ndnboost::tuples::length<Tuple>::value>(),
+            alloc, ptr, x);
+    }
+
+#endif
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Trait to check for piecewise construction.
+
+    template <typename A0>
+    struct use_piecewise {
+        static choice1::type test(choice1,
+            ndnboost::unordered::piecewise_construct_t);
+
+        static choice2::type test(choice2, ...);
+
+        enum { value = sizeof(choice1::type) ==
+            sizeof(test(choose(), ndnboost::unordered::detail::make<A0>())) };
+    };
+
+#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
+
+    ////////////////////////////////////////////////////////////////////////////
+    // Construct from variadic parameters
+
+    // For the standard pair constructor.
+
+    template <typename Alloc, typename T, typename... Args>
+    inline void construct_value_impl(Alloc& alloc, T* address,
+        BOOST_FWD_REF(Args)... args)
+    {
+        ndnboost::unordered::detail::call_construct(alloc,
+            address, ndnboost::forward<Args>(args)...);
+    }
+
+    // Special case for piece_construct
+    //
+    // TODO: When possible, it might be better to use std::pair's
+    // constructor for std::piece_construct with std::tuple.
+
+    template <typename Alloc, typename A, typename B,
+        typename A0, typename A1, typename A2>
+    inline typename enable_if<use_piecewise<A0>, void>::type
+        construct_value_impl(Alloc& alloc, std::pair<A, B>* address,
+            BOOST_FWD_REF(A0), BOOST_FWD_REF(A1) a1, BOOST_FWD_REF(A2) a2)
+    {
+        ndnboost::unordered::detail::construct_from_tuple(alloc,
+            ndnboost::addressof(address->first), ndnboost::forward<A1>(a1));
+        ndnboost::unordered::detail::construct_from_tuple(alloc,
+            ndnboost::addressof(address->second), ndnboost::forward<A2>(a2));
+    }
+
+#else // BOOST_NO_CXX11_VARIADIC_TEMPLATES
+
+////////////////////////////////////////////////////////////////////////////////
+// Construct from emplace_args
+
+    // Explicitly write out first three overloads for the sake of sane
+    // error messages.
+
+    template <typename Alloc, typename T, typename A0>
+    inline void construct_value_impl(Alloc&, T* address,
+            emplace_args1<A0> const& args)
+    {
+        new((void*) address) T(ndnboost::forward<A0>(args.a0));
+    }
+
+    template <typename Alloc, typename T, typename A0, typename A1>
+    inline void construct_value_impl(Alloc&, T* address,
+            emplace_args2<A0, A1> const& args)
+    {
+        new((void*) address) T(
+            ndnboost::forward<A0>(args.a0),
+            ndnboost::forward<A1>(args.a1)
+        );
+    }
+
+    template <typename Alloc, typename T, typename A0, typename A1, typename A2>
+    inline void construct_value_impl(Alloc&, T* address,
+            emplace_args3<A0, A1, A2> const& args)
+    {
+        new((void*) address) T(
+            ndnboost::forward<A0>(args.a0),
+            ndnboost::forward<A1>(args.a1),
+            ndnboost::forward<A2>(args.a2)
+        );
+    }
+
+    // Use a macro for the rest.
+
+#define BOOST_UNORDERED_CONSTRUCT_IMPL(z, num_params, _)                    \
+    template <                                                              \
+        typename Alloc, typename T,                                         \
+        BOOST_PP_ENUM_PARAMS_Z(z, num_params, typename A)                   \
+    >                                                                       \
+    inline void construct_value_impl(Alloc&, T* address,                    \
+        ndnboost::unordered::detail::BOOST_PP_CAT(emplace_args,num_params) <   \
+            BOOST_PP_ENUM_PARAMS_Z(z, num_params, A)                        \
+        > const& args)                                                      \
+    {                                                                       \
+        new((void*) address) T(                                             \
+            BOOST_PP_ENUM_##z(num_params, BOOST_UNORDERED_CALL_FORWARD,     \
+                args.a));                                                   \
+    }
+
+    BOOST_PP_REPEAT_FROM_TO(4, BOOST_UNORDERED_EMPLACE_LIMIT,
+        BOOST_UNORDERED_CONSTRUCT_IMPL, _)
+
+#undef BOOST_UNORDERED_CONSTRUCT_IMPL
+
+    // Construct with piece_construct
+
+    template <typename Alloc, typename A, typename B,
+        typename A0, typename A1, typename A2>
+    inline void construct_value_impl(Alloc& alloc, std::pair<A, B>* address,
+            ndnboost::unordered::detail::emplace_args3<A0, A1, A2> const& args,
+            typename enable_if<use_piecewise<A0>, void*>::type = 0)
+    {
+        ndnboost::unordered::detail::construct_from_tuple(alloc,
+            ndnboost::addressof(address->first), args.a1);
+        ndnboost::unordered::detail::construct_from_tuple(alloc,
+            ndnboost::addressof(address->second), args.a2);
+    }
+
+#endif // BOOST_NO_CXX11_VARIADIC_TEMPLATES
+
+}}}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Some helper functions for allocating & constructing
+
+namespace ndnboost { namespace unordered { namespace detail {
+
+    ////////////////////////////////////////////////////////////////////////////
+    //
+    // array_constructor
+    //
+    // Allocate and construct an array in an exception safe manner, and
+    // clean up if an exception is thrown before the container takes charge
+    // of it.
+
+    template <typename Allocator>
+    struct array_constructor
+    {
+        typedef ndnboost::unordered::detail::allocator_traits<Allocator> traits;
+        typedef typename traits::pointer pointer;
+
+        Allocator& alloc_;
+        pointer ptr_;
+        pointer constructed_;
+        std::size_t length_;
+
+        array_constructor(Allocator& a)
+            : alloc_(a), ptr_(), constructed_(), length_(0)
+        {
+            constructed_ = pointer();
+            ptr_ = pointer();
+        }
+
+        ~array_constructor() {
+            if (ptr_) {
+                for(pointer p = ptr_; p != constructed_; ++p)
+                    traits::destroy(alloc_, ndnboost::addressof(*p));
+
+                traits::deallocate(alloc_, ptr_, length_);
+            }
+        }
+
+        template <typename V>
+        void construct(V const& v, std::size_t l)
+        {
+            BOOST_ASSERT(!ptr_);
+            length_ = l;
+            ptr_ = traits::allocate(alloc_, length_);
+            pointer end = ptr_ + static_cast<std::ptrdiff_t>(length_);
+            for(constructed_ = ptr_; constructed_ != end; ++constructed_)
+                traits::construct(alloc_, ndnboost::addressof(*constructed_), v);
+        }
+
+        pointer get() const
+        {
+            return ptr_;
+        }
+
+        pointer release()
+        {
+            pointer p(ptr_);
+            ptr_ = pointer();
+            return p;
+        }
+
+    private:
+
+        array_constructor(array_constructor const&);
+        array_constructor& operator=(array_constructor const&);
+    };
+}}}
+
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
+#endif