Added Boost.Signals library

[SVN r13964]

include/boost/visit_each.hpp

@@ -0,0 +1,35 @@
+// Boost.Signals library
+//
+// Copyright (C) 2001 Doug Gregor (gregod@cs.rpi.edu)
+//
+// Permission to copy, use, sell and distribute this software is granted
+// provided this copyright notice appears in all copies.
+// Permission to modify the code and to distribute modified code is granted
+// provided this copyright notice appears in all copies, and a notice
+// that the code was modified is included with the copyright notice.
+//
+// This software is provided "as is" without express or implied warranty,
+// and with no claim as to its suitability for any purpose.
+ 
+// For more information, see http://www.boost.org
+
+#ifndef BOOST_VISIT_EACH_HPP
+#define BOOST_VISIT_EACH_HPP
+
+#include <boost/config.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