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  3. February 2004

Re: Bindable APIs Vs Non-Bindable APIs


On Thursday, February 19, 2004, at 09:51 AM, Barbara Morris wrote:

Thanks, that's good to know. I prompted on the PARM part of the CALLPRC
command, and didn't see *OMIT there. Now I see that the help does
mention *OMIT.

That made me curious. I would have expected *OMIT to be a special value but I discovered the SPCVAL keyword is not allowed with parameter type *X (unrestricted). So *OMIT must be handled by the CL compiler as a special case because the CPP for CALLPROC is a dummy program like DO, IF, ENDDO, and other program-only commands.

Then I thought what if I want to pass the character string '*OMIT' to the called procedure? That might be an odd case but is reasonable. I enclosed it in apostrophes. Nope. Don't work. It is still interpreted as the *OMIT special value. With normal commands you can force the character value to bypass special value processing by enclosing it in apostrophes and including an extra space ('*OMIT ') but that doesn't work on CALLPRC.

Hmm? Trap for young players ... probably not a big deal.

Regards,
Simon Coulter.
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