RE: Overloading RPG Subprocedures

Brad,

What about passing both DS's to the procedure. The return code can tell you which was populated.

rc = getData('10' : thisInvoiceDS : thisPurchaseOrderDS);
rc = -1 - fail
rc = 1 - Invoice
rc = 2 - PO

Roger Harman
COMMON Certified Application Developer - ILE RPG on IBM i on Power




-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Brad Stone
Sent: Monday, January 15, 2024 5:02 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Overloading RPG Subprocedures

That's what I was thinking too, Scott (as mentioned in my last email).

I just have a couple very similar subprocedures where the only real
difference is the path of the call to a web API and one output parameter...
What I really would like in actuality is the ability to return a different
DS depending on what is passed in.

Just playing around during these cold slow days. :)

On Sun, Jan 14, 2024 at 10:56 PM Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>
wrote:

Brad,

This seems like an unusual use case, why would you want a routine where
the caller doesn't need to distinguish between a PO and an invoice?

That said, the code you provided should work. Are you having problems?

-SK

On 1/14/2024 4:11 PM, Brad Stone wrote:

So, I decided to start digging into this. It looks pretty cool. Thanks

for

the examples online (Scott!)

I have yet to find any examples with more than one parameter, so here is

my

question....

Can you overload with multiple parameters where one or two are different?
Like this to retrieve an invoice or PO:

dcl-pr getInvoice int(10);
In_ID char(128) const;
Out_Invoice likeds(invoiceDS) options(*exact);
end-pr;

dcl-pr getPO int(10);
In_ID char(128) const;
Out_PO likeds(poDS) options(*exact);
end-pr;

dcl-pr getData int(10) Overload(getInvoice:getPO);

So you could do something like:

dcl-ds thisInvoiceDS like(invoiceDS) end-ds;
dcl-ds thisPODS like(poDS) end-ds;
dcl-s rc int(10);

rc = getData('10':thisInvoiceDS);
rc = getData('10':thisPurchaseOrderDS);

From what I'm reading this should work.

Blizzards are fun. Downtime = exploring time. :)


Bradley V. Stone
www.bvstools.com
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