Re: PTF enhancements for RPG

On Jun 5, 2019, at 8:55 AM, Duane Scott <dscott@xxxxxxxxxxx> wrote:

Barbara (or other excellent explainer),

This is a great feature. Except it's not working as I imagined it and as Jon Paris "exampled" it in his article in The Four Hundred: Guru: 7.4 Brings New RPG Goodies.

I've tried to work this one in on my 7.3 and am having a difficult time adjusting it to work.

My example tries to redefine a record format where 18 sets of an 8 byte character followed by a 1 byte character:

dcl-f history1 usage(*input); // rcdfmt(hst1)
dcl-ds ds_hst1 likerec(hst1) ;
dcl-ds ar_hst1 extname('HISTORY1' : 'HST1') qualified;
diag1_set like(hdiag1) samepos(hdiag1);
dcl-ds set_diag dim(18) samepos(hdiag1);
hdiag like(hdiag1);
hdiagpoa like(hdiag1poa);
end-ds;
end-ds;

when compiling, I get:
RNF3523: External description SET_DIAG for data structure is not found; data structure is ignored.

My outline (RDi) shows that SET_DIAG has the correct elements.

I did get it to work as advertised on a single field array.

Any suggestions?


Duane Scott

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Barbara Morris
Sent: Wednesday, April 24, 2019 10:21 AM
To: rpg400-l@xxxxxxxxxxxxxxxxxx
Subject: Re: PTF enhancements for RPG

On 2019-04-23 6:06 PM, Jon Paris wrote:

The one thing this one can't do easily Joe is to create an array from non-contiguous fields - that you'll still have to use the DS/Overlay approach for.

If they were all the same distance apart, you could define a data structure array with all the repeated fields.

dcl-ds ds;
x char(5);
a1 packed(3);
b1 char(5);
a2 packed(5);
b2 char(5);
a3 char(5);
b3 char(5);
dcl-ds a_b_array dim(3) samepos(a1);
a like(a1);
b like(b1);
end-ds;
end-ds;

--
Barbara

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