Reader Feedback and Insights: We Want More RPG
November 6, 2002 Timothy Prickett Morgan
Hey, Ted:
It was good to see some RPG stuff in Midrange Guru. It’s been absent lately. from my experience, there’s still more old code out there than new.
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I’ve done much to modernize our old code. It’s native now. I’ve written programs to change programs–for instance, moving user messages from compile-time arrays to message subfiles–but there are still lots of indicators! Even though my files are externally defined, the old code refers to them internally. Changing that would be overwhelming.
The one nice thing, though, is that in native mode, I can increase the record length of a file without changing all the F specs. The system doesn’t care that this 500-byte file is described as 450 in a program, so long as that program doesn’t use the locations above 450. I think this is better than programs using the external descriptions, which have to be recompiled. Funny, isn’t it?
I write plenty of ILE RPG with subprocedures and service programs, to name a few, every chance I get, and I’ve converted plenty of old S/36 stuff to ILE as well, but from where I stand, the legacy code is here to stay.
— John
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