REPORT Z17_020 .
* Interfaces
INTERFACE object_status.
METHODS write_status.
ENDINTERFACE.
* Class Declarations
CLASS vehicle DEFINITION.
PUBLIC SECTION.
INTERFACES object_status.
ALIASES write_status FOR object_status~write_status.
METHODS accelerate.
PROTECTED SECTION.
DATA speed TYPE i.
ENDCLASS.
* Class Implementations
CLASS vehicle IMPLEMENTATION.
METHOD accelerate.
speed = speed + 1.
ENDMETHOD.
METHOD object_status~write_status.
WRITE: / 'Speed:', speed.
ENDMETHOD.
ENDCLASS.
* Global Data
DATA: vehicle_ref TYPE REF TO vehicle.
* Classical Processing Blocks
START-OF-SELECTION.
CREATE OBJECT vehicle_ref.
CALL METHOD: vehicle_ref->accelerate,
vehicle_ref->write_status.
* Interfaces
INTERFACE object_status.
METHODS write_status.
ENDINTERFACE.
* Class Declarations
CLASS vehicle DEFINITION.
PUBLIC SECTION.
INTERFACES object_status.
ALIASES write_status FOR object_status~write_status.
METHODS accelerate.
PROTECTED SECTION.
DATA speed TYPE i.
ENDCLASS.
* Class Implementations
CLASS vehicle IMPLEMENTATION.
METHOD accelerate.
speed = speed + 1.
ENDMETHOD.
METHOD object_status~write_status.
WRITE: / 'Speed:', speed.
ENDMETHOD.
ENDCLASS.
* Global Data
DATA: vehicle_ref TYPE REF TO vehicle.
* Classical Processing Blocks
START-OF-SELECTION.
CREATE OBJECT vehicle_ref.
CALL METHOD: vehicle_ref->accelerate,
vehicle_ref->write_status.
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