Re: OVERLAY with nested data structure

To trick the compiler into calculating an array size as shown here.
dcl-c T1Cnt %div(%size(T1.TtlSiz):%size(CD_t));


___________________________________
Darren Strong
Dekko





From: Jon Paris <jon.paris@xxxxxxxxxxxxxx>
To: Rpg400 Rpg400-L <rpg400-l@xxxxxxxxxxxx>
Date: 06/16/2017 03:41 PM
Subject: Re: OVERLAY with nested data structure
Sent by: "RPG400-L" <rpg400-l-bounces@xxxxxxxxxxxx>



Not directly related to your problem Darren - but why on earth are you
overlaying TtlSiz to begin with?

Why not just:

dcl-ds T1 qualified;
dcl-ds FullName;
Col like(CurCol_t) INZ;
Wid like(ColWid_t) inz(46);
Hdg1 like(ColHdr_t) inz('');
Hdg2 like(ColHdr_t) inz('Employee');
end-ds;
arr likeds(CD_t) dim(T1Cnt) pos(1);
end-ds;

For that matter the POS doesn't seem to make sense either. Doesn't this
achieve the same thing?

dcl-ds FullName dim(T1Cnt);
Col like(CurCol_t) INZ;
Wid like(ColWid_t) inz(46);
Hdg1 like(ColHdr_t) inz('');
Hdg2 like(ColHdr_t) inz('Employee');
end-ds;

What am I missing. It also seems at first glance (although I haven't
checked in detail) that T1Cnt will always be 1.

Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Jun 16, 2017, at 11:27 AM, Darren Strong <darren@xxxxxxxxx> wrote:

I'm trying out the new i7.3 TR2 stuff. I have a data structure like the

following that I'm trying to convert to nested, but I'm not allowed to

use

the overlay in a datastructure definition. I've pasted the error message

in the "Desired State" section below. Is there a way around this? This
example only shows one nested element, but my production program has
several. They were removed to simplify the example.


Current state:
dcl-ds CD_t qualified template;
Col like(CurCol_t);
Wid like(ColWid_t);
Hdg1 like(ColHdr_t);
Hdg2 like(ColHdr_t);
end-ds;

dcl-ds FullName1CD_t qualified template;
Col like(CurCol_t) INZ;
Wid like(ColWid_t) inz(46);
Hdg1 like(ColHdr_t) inz('');
Hdg2 like(ColHdr_t) inz('Employee');
end-ds;

dcl-ds T1 qualified;
TtlSiz;
FullName likeds(FullName1CD_t) inz(*likeds) overlay(TtlSiz);

arr likeds(CD_t) dim(T1Cnt) pos(1);
end-ds;

dcl-c T1Cnt %div(%size(T1.TtlSiz):%size(CD_t));


Desired State that gives the error:
dcl-ds CD_t qualified template;
Col like(CurCol_t);
Wid like(ColWid_t);
Hdg1 like(ColHdr_t);
Hdg2 like(ColHdr_t);
end-ds;

dcl-ds T1 qualified;
TtlSiz;
dcl-ds FullName qualified overlay(TtlSiz);
RNF0202: KEYWORD NOT ALLOWED FOR A NESTED DATA STRUCTURE SUBFIELD
Col like(CurCol_t) INZ;
Wid like(ColWid_t) inz(46);
Hdg1 like(ColHdr_t) inz('');
Hdg2 like(ColHdr_t) inz('Employee');
end-ds;
arr likeds(CD_t) dim(T1Cnt) pos(1);
end-ds;

dcl-c T1Cnt %div(%size(T1.TtlSiz):%size(CD_t));
--
This is the RPG programming on the IBM i (AS/400 and iSeries) (RPG400-L)

mailing list

To post a message email: RPG400-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.

Please contact support@xxxxxxxxxxxx for any subscription related

questions.

Help support midrange.com by shopping at amazon.com with our affiliate

link: http://amzn.to/2dEadiD