Include bind in ndnboost.
diff --git a/ndnboost/visit_each.hpp b/ndnboost/visit_each.hpp
new file mode 100644
index 0000000..43dfa65
--- /dev/null
+++ b/ndnboost/visit_each.hpp
@@ -0,0 +1,29 @@
+// Boost.Signals library
+
+// Copyright Douglas Gregor 2001-2003. 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/signals
+
+#ifndef BOOST_VISIT_EACH_HPP
+#define BOOST_VISIT_EACH_HPP
+
+#include <ndnboost/config.hpp>
+
+namespace ndnboost {
+ template<typename Visitor, typename T>
+ inline void visit_each(Visitor& visitor, const T& t, long)
+ {
+ visitor(t);
+ }
+
+ template<typename Visitor, typename T>
+ inline void visit_each(Visitor& visitor, const T& t)
+ {
+ visit_each(visitor, t, 0);
+ }
+}
+
+#endif // BOOST_VISIT_EACH_HPP