Added boost header

test/external/boost/signals2/expired_slot.hpp

@@ -0,0 +1,31 @@
+// Boost.Signals2 library
+
+// Copyright Frank Mori Hess 2007-2010.
+// 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
+
+#ifndef BOOST_SIGNALS2_EXPIRED_SLOT_HPP
+#define BOOST_SIGNALS2_EXPIRED_SLOT_HPP
+
+#include <boost/smart_ptr/bad_weak_ptr.hpp>
+
+namespace boost
+{
+  namespace signals2
+  {
+    class expired_slot: public bad_weak_ptr
+    {
+    public:
+      virtual char const * what() const throw()
+      {
+        return "boost::signals2::expired_slot";
+      }
+    };
+  }
+} // end namespace boost
+
+#endif // BOOST_SIGNALS2_EXPIRED_SLOT_HPP