Boost Exception

In other libraries, watch for compile error referring to throw_exception_assert_compatibility in boost::throw_exception. Resolve by throwing an exception that derives from std::exception. This is not a new requirement but it is being enforced now.

[SVN r46818]

example/cloning_2.cpp

@@ -0,0 +1,39 @@
+//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)
+
+//This example shows how to transport cloning-enabled boost::exceptions between threads.
+
+#include <boost/exception_ptr.hpp>
+#include <boost/thread.hpp>
+#include <boost/bind.hpp>
+
+void do_work(); //throws cloning-enabled boost::exceptions
+
+void
+worker_thread( boost::exception_ptr & error )
+    {
+    try
+        {
+        do_work();
+        error = boost::exception_ptr();
+        }
+    catch(
+    ... )
+        {
+        error = boost::current_exception();
+        }
+    }
+
+// ...continued
+
+void
+work()
+    {
+    boost::exception_ptr error;
+    boost::thread t( boost::bind(worker_thread,boost::ref(error)) );
+    t.join();
+    if( error )
+        boost::rethrow_exception(error);
+    }