Pull in some dependencies of Boost.Range.

boost/visit_each.hpp

@@ -0,0 +1,27 @@
+// 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
+
+namespace boost {
+  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