Hi everyone,
Once i have saw a expression in ABAP program. as follows.
DATA:drag_object TYPE REF TO lcl_dragdrop_dataobject.
CATCH SYSTEM-EXCEPRIONS move_cast_error = 1.
drag_object ?= dragdrop_object->object.
ENDCATCH.
IF sy-subrc = 1.
CALL METHOD dragdrop_object->abort.
EXIT.
ENDIF.
I don't know what is "?=" .
Please help me.
Thanks Advanced !