When migrating a redefined record, the migration tool does the
following:
- Migrates the redefined record (RecordA) to a basicRecord.
- Includes a VAGen Info comment in RecordA indicating it redefined
RecordB.
- Issues an informational message that RecordA redefines RecordB.
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When migrating a redefined record, the migration tool does the same thing
mentioned in the Migrating with the associated part column.
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When migrating a program, if RecordA is available, the migration tool does
the following:
- If RecordA is treated as a redefinition of RecordB in VisualAge Generator,
the migration tool includes the redefines property in the declaration for
RecordA.
- If RecordA is not treated as a redefinition of RecordB in VisualAge
Generator, the migration tool does not include the redefines property in the
declaration for RecordA.
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When migrating a program, if RecordA is not available, the migration tool
does not know that RecordA is a redefined record. The migration tool
does not include the redefines property in the declaration for
RecordA.
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Considerations for new use: A problem only arises if you
need to use RecordA and RecordB in a new program. You must remember to
include the redefines property for RecordA whenever you want RecordA to be
treated as a redefinition of RecordB.
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Potential Problem 1: A problem arises if the VAGen program
uses RecordA as a redefinition. Immediately after migration, the
program will not be a valid EGL program because the definition for RecordA and
the import statement will be missing. There will be an error on the
Tasks list. If you migrate RecordA and add the import statement to the
program, this will convert the program into a valid EGL program.
However, there will be two data areas -- one for RecordA and one for
RecordB. EGL will not detect this change during validation or
preprocessing. The program will not run the same as in VisualAge
Generator.
Solution: If you migrate additional records or add import
statements to a program, review the record definitions for a VAGen Info
comment. If there is a VAGen Info comment specifying that that RecordA
is a redefinition for RecordB, update the program to include the
redefines property for the declaration of RecordA.
Considerations: The same considerations for new use listed
under the Migrating with the associated part column can also
occur.
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