Added boost header

test/external/boost/variant/bad_visit.hpp

@@ -0,0 +1,41 @@
+//-----------------------------------------------------------------------------
+// boost variant/bad_visit.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2002-2003
+// Eric Friedman
+//
+// 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_VARIANT_BAD_VISIT_HPP
+#define BOOST_VARIANT_BAD_VISIT_HPP
+
+#include <exception>
+
+namespace boost {
+
+//////////////////////////////////////////////////////////////////////////
+// class bad_visit
+//
+// Exception thrown when a visitation attempt via apply_visitor fails due
+// to invalid visited subtype or contents.
+//
+struct bad_visit
+    : std::exception
+{
+public: // std::exception interface
+
+    virtual const char * what() const throw()
+    {
+        return "boost::bad_visit: "
+               "failed visitation using boost::apply_visitor";
+    }
+
+};
+
+} // namespace boost
+
+#endif // BOOST_VARIANT_BAD_VISIT_HPP