Inheriting from an external class

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Use the CG::Class::UseAsExternal property to inherit from a class that is not part of the model.

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To inherit from a class that is external to the model:
  1. Set the CG::Class::UseAsExternal property for the class to Checked. Use this setting to prevent code from being generated for the superclass.
  2. To generate an #include of the class header file in the subclass, do one of the following:
  • Add the external element to the scope of some component.
  • Map the external element to a file in the component.
  • Set the CG::Class::FileName property for the class to the name of its specification file (for example, super.h). That file is included in the source files for classes that have relations to it. If the FileName property is not set, no #include is generated.

If you need a class to import an entire package instead of a specific class, add a dependency (see Dependencies) with a stereotype of «Usage» to the external package.