Include bind in ndnboost.
diff --git a/ndnboost/iterator/detail/enable_if.hpp b/ndnboost/iterator/detail/enable_if.hpp
new file mode 100644
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--- /dev/null
+++ b/ndnboost/iterator/detail/enable_if.hpp
@@ -0,0 +1,86 @@
+// (C) Copyright David Abrahams 2002.
+// (C) Copyright Jeremy Siek 2002.
+// (C) Copyright Thomas Witt 2002.
+// 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)
+#ifndef BOOST_ENABLE_IF_23022003THW_HPP
+#define BOOST_ENABLE_IF_23022003THW_HPP
+
+#include <ndnboost/detail/workaround.hpp>
+#include <ndnboost/mpl/identity.hpp>
+
+#include <ndnboost/iterator/detail/config_def.hpp>
+
+//
+// Boost iterators uses its own enable_if cause we need
+// special semantics for deficient compilers.
+// 23/02/03 thw
+//
+
+namespace ndnboost
+{
+
+ namespace iterators
+ {
+ //
+ // Base machinery for all kinds of enable if
+ //
+ template<bool>
+ struct enabled
+ {
+ template<typename T>
+ struct base
+ {
+ typedef T type;
+ };
+ };
+
+ //
+ // For compilers that don't support "Substitution Failure Is Not An Error"
+ // enable_if falls back to always enabled. See comments
+ // on operator implementation for consequences.
+ //
+ template<>
+ struct enabled<false>
+ {
+ template<typename T>
+ struct base
+ {
+#ifdef BOOST_NO_SFINAE
+
+ typedef T type;
+
+ // This way to do it would give a nice error message containing
+ // invalid overload, but has the big disadvantage that
+ // there is no reference to user code in the error message.
+ //
+ // struct invalid_overload;
+ // typedef invalid_overload type;
+ //
+#endif
+ };
+ };
+
+
+ template <class Cond,
+ class Return>
+ struct enable_if
+# if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_IS_CONVERTIBLE)
+ : enabled<(Cond::value)>::template base<Return>
+# else
+ : mpl::identity<Return>
+# endif
+ {
+# if BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+ typedef Return type;
+# endif
+ };
+
+ } // namespace iterators
+
+} // namespace ndnboost
+
+#include <ndnboost/iterator/detail/config_undef.hpp>
+
+#endif // BOOST_ENABLE_IF_23022003THW_HPP