In version 2.21 a new C++ backend was added. To select this backend call the code generator with the new command line flag ’-l cppx’. It has two additional features:

1. •State machines are not limited to three hierarchy levels anymore but can have more levels of nesting (like cx) . This is an important feature if you want to model really complex things.
   

2. •It is now possible to inline all entry/exit/action code into the main state machine code. So no state classes are generated at all. The new keyword ’SeparateStateClasses = No’ enables this feature.