Include bind in ndnboost.
diff --git a/ndnboost/range/detail/extract_optional_type.hpp b/ndnboost/range/detail/extract_optional_type.hpp
new file mode 100644
index 0000000..e77f37c
--- /dev/null
+++ b/ndnboost/range/detail/extract_optional_type.hpp
@@ -0,0 +1,52 @@
+// Boost.Range library
+//
+// Copyright Arno Schoedl & Neil Groves 2009.
+// Use, modification and distribution is subject to 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)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+#ifndef BOOST_RANGE_DETAIL_EXTRACT_OPTIONAL_TYPE_HPP_INCLUDED
+#define BOOST_RANGE_DETAIL_EXTRACT_OPTIONAL_TYPE_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif
+
+#include <ndnboost/config.hpp>
+
+#ifdef BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS
+
+#define BOOST_RANGE_EXTRACT_OPTIONAL_TYPE( a_typedef ) \
+ template< typename C > \
+ struct extract_ ## a_typedef \
+ { \
+ typedef BOOST_DEDUCED_TYPENAME C::a_typedef type; \
+ };
+
+#else
+
+namespace ndnboost {
+ namespace range_detail {
+ template< typename T > struct exists { typedef void type; };
+ }
+}
+
+// Defines extract_some_typedef<T> which exposes T::some_typedef as
+// extract_some_typedef<T>::type if T::some_typedef exists. Otherwise
+// extract_some_typedef<T> is empty.
+#define BOOST_RANGE_EXTRACT_OPTIONAL_TYPE( a_typedef ) \
+ template< typename C, typename Enable=void > \
+ struct extract_ ## a_typedef \
+ {}; \
+ template< typename C > \
+ struct extract_ ## a_typedef< C \
+ , BOOST_DEDUCED_TYPENAME ndnboost::range_detail::exists< BOOST_DEDUCED_TYPENAME C::a_typedef >::type \
+ > { \
+ typedef BOOST_DEDUCED_TYPENAME C::a_typedef type; \
+ };
+
+#endif
+
+#endif // include guard