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