Re: Using % type functions

[boldt@xxxxxxxxxx]

Peter wrote:
>What you need to do is convert the subroutine to a procedure, i.e. replace
>the BEGSR/ENDSR with P-specs, add a prototype defintions (D-spec type
"PR")
>in the main part of the program and a matching procedure interface within
>the procedure. These define the parameters passed to the procedure. Then
you
>can use it as you described, but without the percent sign:
>
>> C           Eval   BSDPuR = MoveMDYToDate(CMDPuR)
>
>Another advantage of converting to a procedure is that the procedure can
>have local variables.
>
>For more details, they're all in the ILE RPG Reference manual. I'm pretty
>sure they were available for V3R7, but not totally sure...


V3R2/V3R6 actually.  In other words, no one has any excuse
not to use them.

Some advantages:
-- local variables
-- compile-time type checking of parameters
-- VALUE parameters
-- CONST parameters
-- passing expressions for VALUE and CONST parms
-- better modularization of apps
-- ability to call C runtime functions
-- return values from procedures
-- easier to share and reuse code

Why would anyone NOT want to use procedures?

Cheers!  Hans

Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com


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