log_exp - IS ASSIGNED
... <fs> IS [NOT] ASSIGNED ...
The logical expression checks whether a memory area is assigned to a field symbol
. The expression is true if the field symbol points to a memory area. For
<fs>, a field symbol specified with
FIELD-SYMBOLS must be declared .
With the addition
NOT, the expression is true if no memory area is assigned to the field symbol.
Assignment of a data object to a field symbol if no memory area has been assigned yet.
FIELD-SYMBOLS <fs> TYPE c. ... IF <fs> IS NOT ASSIGNED. ASSIGN 'Standard Text' TO <fs>. ENDIF. ...