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James,
What is happening is, since the DS will only be used as a template for
other DS's using LikeDS(), basing the DS on an implicitly defined (null)
pointer just keeps the storage for that DS from being allocated. Since
that template DS will never actually be used, there is no reason to waste
the memory to allocate storage for it.
Hope that clarifies,
Brian May
Project Lead
Management Information Systems
Garan, Incorporated
Starkville, Mississippi
"James H. H. Lampert" <jamesl@xxxxxxxxxxxxxxxxx>
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
11/23/2010 07:51 PM
Please respond to
RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>
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Subject
Re: What is "BASED(StructureTemplate)"
Rory Hewitt wrote:
If a pointer is specified in a BASED keyword and it's not explicitly
defined
elsewhere, the RPG compiler implicitly defines it.
Given the name, my guess is that whoever wrote this code probably has a
number of structures etc. defined as Based(StructureTemplate) -
basically,
it's a placeholder, that's never used.
Now that you mention it, I think I have seen implicitly defined basing
pointers here and there.
The strangest part is that I see it referenced in LIKE and LIKEDS
clauses, but the structures being cloned from it aren't themselves
defined as BASED.
--
JHHL
midrange.com
