Re: CL subroutines -- MIDRANGE-L


On 23/05/2006, at 10:45 PM, rob@xxxxxxxxx wrote:

The basic gist of it is that subroutines have to be before the ENDPGM.

Sort of makes sense. ENDPGM marks the end of the source. Note that PGMand ENDPGM are not required by the OPM compiler. It flags their absenceas a warning but will compile. You can even compile an empty sourcemember using the CL compiler. No that's a NOP program! I presume theILE compiler does the same.

If you screw up and put them after ENDPGM then the compiler ignoresthem. Ihaven't tested it but I bet you could type the 23rd Psalm after ENDPGMin
an otherwise valid CL program and it would be ignored.


Hmm, I wonder ...

pgm
endpgm
Yea, though I walk through the valley of the shadow of death,
I shall fear no evil:
For I am the meanest son-of-a-bitch in the valley!

What do you know? It compiles. Interestingly the compiler output showsthe source as:


                                      Control Language Source

SEQNBR *...+... 1 ...+... 2 ...+... 3 ...+... 4 ...+... 5 ...+... 6...+... 7 ...+

    100- pgm
    200- endpgm
* CPD0729 10  No executable commands found in source file.

* * * * * E N D O F S O U R C E* * * * *

That's only part of the problem. The other part is that instead ofsimply
flagging it as missing the subroutine the compiler goes off into La-La
land.  IBM has now recognized this and will fix it.


That's good to know.

I guess the testing involved only correctly written programs.  And not
programs written by someone who simply went to GO CMDSUBR as their sole
source for learning about subroutines in CL.
I've learned to use a simple RETURN before my subroutines to give me a
warm fuzzy about the end of the mainline before the start of the
subroutines.

I tend to always put a RETURN after the body of my CL. My generic errorhandler goes after the RETURN and before the ENDPGM.


Regards,
Simon Coulter.
--------------------------------------------------------------------
   FlyByNight Software         AS/400 Technical Specialists

   http://www.flybynight.com.au/
   Phone: +61 3 9419 0175   Mobile: +61 0411 091 400        /"\
   Fax:   +61 3 9419 0175                                   \ /
                                                             X
                 ASCII Ribbon campaign against HTML E-Mail  / \
--------------------------------------------------------------------