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6.2.4.3 BY CONTENT Phrase

 



   If the BY CONTENT phrase is specified or implied for a parameter, the
   called program cannot change the value of this parameter as referenced in
   the CALL statement's USING phrase, though the called program can change
   the value of the data item referenced by the corresponding data-name in
   the called program's Procedure Division header.  Changes to the parameter
   in the called program do not affect the corresponding argument in the
   calling program.
identifier-3

X Can be a data item of any level in the Data Division. Identifier-3 cannot be a function identifier.
Note: If defined in the Linkage Section or File Section, you must have already provided addressability for identifier-3 prior to invocation of the CALL statement. You can do this by coding either one of the following: SET ADDRESS OF identifier-3 TO pointer or PROCEDURE/ENTRY USING.

X literal-2

X Can be:
  • X A nonnumeric literal
  • X A figurative constant (except ALL literal or NULL/NULLS)
  • X A DBCS literal

X LENGTH OF Special Register

X For information on the LENGTH OF special register, see "LENGTH OF" in
X topic 1.1.3.3.

X ADDRESS OF Special Register

X For information on the ADDRESS OF special register, see "ADDRESS OF"
X in topic 1.1.3.1.

X OMITTED

X Indicates that no argument is passed.

X For nonnumeric literals, the called subprogram should describe the
X parameter as PIC X(n) USAGE DISPLAY, where "n" is the number of characters
X in the literal.

X For DBCS literals, the called subprogram should describe the parameter as
X PIC G(n) USAGE DISPLAY-1, or PIC N(n) with implicit or explicit USAGE
X DISPLAY-1, where "n" is the length of the literal.

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