PROCEDURE and ENTRY statements
A procedure (subroutine or
function) can have one or more entry points. The primary entry point
to a procedure is established by the leftmost label of the procedure statement.
Secondary entry points to a procedure are established by additional
labels on the PROCEDURE statement and by the ENTRY statement. Each
entry point has an entry name. See INTERNAL and EXTERNAL attributes for
a discussion of the rules for the creation of an external name.
A PROCEDURE statement identifies the procedure as a main procedure,
a subroutine, or a function. Parameters expected by the procedure
and other characteristics are also specified on the PROCEDURE statement.
 .--------------.
V |
>>---entry-label:-+--PROCEDURE--+-------------------+----------->
| .-,---------. |
| V | |
'-(---parameter-+-)-'
>--+----------------+--+------------------+--+-----------+------>
'-returns-option-' '-OPTIONS(options)-' '-RECURSIVE-'
.------------------------.
V |
>--+-----------------+--;----+-statement----------+-+----------->
'-scope-attribute-' +-group--------------+
+-internal-procedure-+
'-begin-block--------'
>--END--+-------------+--;-------------------------------------><
'-entry-label-'
|
Abbreviations: PROC for PROCEDURE
- entry-label
- The entry point to the procedure. External entries are explicitly
declared in the invoking procedure. If multiple entry labels are
specified, the leftmost name is the primary entry point and is the
name returned by the PROCNAME and ONLOC built-in functions. For
more information on entry data, refer to Entry data.
- parameter
- Refer to Parameter attribute and Passing arguments to procedures.
- returns-option
- Applies only to function procedures. Refer to Functions and RETURNS option and attribute.
- OPTIONS option
- Refer to OPTIONS option and attribute.
- RECURSIVE
- Refer to Recursive procedures.
- scope-attribute
- Refer to Scope of declarations.
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