REPORT  Z17_017 .

CLASS C1 DEFINITION.
PUBLIC SECTION.
   METHODS constructor IMPORting p1 type any.
ENDCLASS.

CLASS C2 DEFINITION INHERITING FROM C1.
PUBLIC SECTION.
  METHODS constructor IMPORTING p2 type any.
ENDCLASS.

CLASS C1 IMPLEMENTATION.
  METHOD constructor.
     WRITE / p1.
  ENDMETHOD.

ENDCLASS.

CLASS C2 IMPLEMENTATION.
  METHOD constructor.
     call method super->constructor( p2 ).
  ENDMETHOD.
ENDCLASS.


START-OF-SELECTION.

data : cref1 type ref to c1,
       cref2 type ref to c2.


create object cref2 EXPORTING p2 = 'Constructor Test'.