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Simple answer - Yes - but it has always worked - nothing to do with free-format.

Longer answer. Because of RPG's "one name one memory location" idea, the compiler decides where in memory a field's storage should be relatively late in the compile process (unlike for example COBOL which simply maps the record to the input buffer). As a result if you name fields from a file in a DS then the compiler will use the location you have specified. In fact you don't even need to define the field's characteristics. Just the name is enough.

I've used this for many years to handle situations where there is (say) a history record with 12 months of sales, and it is convenient to process them as an array.

So as long as you define the fields consecutively this works just fine to achieve this:

Dcl-ds myDS;
JanSales;
FebSales;
....
DecSales;

monthlySales Like(JanSales) Dim(12) SamePos(JanSales);
End-ds;



On Jun 9, 2020, at 10:53 AM, Thomas Burrows <thomas.burrows.1957@xxxxxxxxx> wrote:

In RPGIV - maybe this is true in free format - if a Data Structure is
defined with the exact names and sizes of the fields in a file when the
file is read is the data structure automatically loaded?

Personally I have never seen this before.

Thomas
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