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Status Future consideration
Workspace IBM i
Categories Languages - RPG
Created by Guest
Created on Mar 6, 2024

RELATED IDEAS

Merged idea

This idea has been merged into another idea. To comment or vote on this idea, please visit IBMI-I-3521 Allow the CONST keyword for a standalone field or data structure.

Read only datastructures with the use of the keyword const. Merged

If we have datastructure with overlapping fields, like in this example:
(See the added CONST keyword after the qualified keyword).

       dcl-ds ProductionStatus qualified CONST;
        ALL           char(18) inz('01020510152099WOCO');
        NEW           char( 2) overlay(ALL:1);
        REALLOCATE    char( 2) overlay(ALL:*next);
        ALLOCATION    char( 2) overlay(ALL:*next);
        MANUAL        char( 2) overlay(ALL:*next);
        ALLOCATED     char( 2) overlay(ALL:*next);
        COMPLETE      char( 2) overlay(ALL:*next);
        ARCHIVED      char( 2) overlay(ALL:*next);
        WAREHOUSE     char( 2) overlay(ALL:*next);
        CUSTOMERORDER char( 2) overlay(ALL:*next);
      end-ds;

 

We can then use the subfields qualified to the datastructure name like this.

if someProductionStatusField = ProductionStatus.COMPLETE;
  doSomething( );
endif;

 

It would be great if the datastructure would be considered a read-only datastructure to avoid changing it's values  with code,

and it makes the code much more readable.

Idea priority Medium

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