Re: %XFoot a DS array -- RPG400-L

"array" is a group field Roger. By definition it is a character field whose length is calculated by the compiler and is derived from the sum of all the fields that OVERLAY it. It pre-dates DS arrays and in some cases (as in the OP's example) can still be used to do some things that a DS array cannot currently do.

Read this for more on the overall topic and related techniques: http://ibmsystemsmag.com/CMSTemplates/IBMSystemsMag/Print.aspx?path=/ibmi/developer/general/D-spec-Discoveries <http://ibmsystemsmag.com/CMSTemplates/IBMSystemsMag/Print.aspx?path=/ibmi/developer/general/D-spec-Discoveries>

Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Dec 8, 2017, at 12:04 AM, Roger Harman <roger.harman@xxxxxxxxxxx> wrote:

Maybe it's just the end of a long day, but this confuses me. I meant to try it before I left work today but didn't get to it.

What is "array"? There is no data type. How does "num" get translated to a 100 element array? It looks like a single int(5).

-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jon Paris
Sent: Thursday, December 07, 2017 9:34 AM
To: Rpg400 Rpg400-L
Subject: Re: %XFoot a DS array

Nope - but this works as it does at most any release.

Dcl-ds x;
array dim(100);
num int(5) overlay(array);
end-ds;

dcl-s tot int(10);

tot = %Xfoot(num);

Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Dec 7, 2017, at 11:18 AM, Jeff Crosby <jlcrosby@xxxxxxxxxxxxxxxx> wrote:

On 7.1.

I'm wanting to %XFoot a DS array. Compiler complains with:

RNF7591 An operand of a qualified name expression is not valid.
RNF0555 The parameter for %XFOOT is not valid; %XFOOT is ignored.

I found a thread from 2013 stating that one cannot %XFoot a DS array at 7.1.

I won't be at 7.3 for a month at least. Is %XFoot a DS array allowed at
7.3?

Thanks.

--

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