boost exception

[SVN r43485]

include/boost/exception/cloning.hpp

@@ -0,0 +1,58 @@
+//Copyright (c) 2006-2008 Emil Dotchevski and Reverge Studios, Inc.
+
+//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 UUID_FA5836A2CADA11DC8CD47C8555D89593
+#define UUID_FA5836A2CADA11DC8CD47C8555D89593
+
+#include <boost/exception/enable_exception_cloning.hpp>
+#include <boost/exception/exception.hpp>
+#include <boost/exception/detail/cloning_base.hpp>
+
+namespace
+boost
+	{
+	class
+	unknown_exception:
+		public exception,
+		public std::exception
+		{
+		public:
+
+		explicit
+		unknown_exception()
+			{
+			}
+
+		explicit
+		unknown_exception( boost::exception const & x ):
+			boost::exception(x)
+			{
+			}
+		};
+
+	typedef intrusive_ptr<exception_detail::clone_base const> exception_ptr;
+
+	template <class T>
+	exception_ptr
+	clone_exception( T const & e )
+		{
+		if( boost::exception_detail::cloning_base const * cb = dynamic_cast<boost::exception_detail::cloning_base const *>(&e) )
+			if( exception_detail::clone_base const * c = cb->clone() )
+				return exception_ptr(c);
+		if( boost::exception const * be = dynamic_cast<boost::exception const *>(&e) )
+			return exception_ptr(exception_detail::make_clone(unknown_exception(*be)));
+		else
+			return exception_ptr(exception_detail::make_clone(unknown_exception()));
+		}
+
+	inline
+	void
+	rethrow_exception( exception_ptr const & p )
+		{
+		p->rethrow();
+		}
+	}
+
+#endif