Re: Report API and Catalog

["Aaron Bartell" <aaronbartell@xxxxxxxxx>]

> I'd really like to see an article or other info on those OO techniques.

Ditto on that one for me.  I have my own ways of making things "OO" in RPG,
but would love to hear somebody else digress into the subject, especially as
it relates to separation of concern.

Aaron Bartell



On Tue, Jun 3, 2008 at 2:05 PM, Roger Harman <RHarman@xxxxxxxxxx> wrote:

> I'd really like to see an article or other info on those OO techniques.
>
> > > > nandelin@xxxxxxxxx 06/03/2008 11:34:06 AM >>>
> > From: Aaron Bartel
> > Does RPG make a good "plumbing" or "framework base" type language?
>
> Service programs make good toolkits.  And after you've written a dozen
> or so service programs you're beginning to have a good "framework".
>
> Barbara Morris of the Toronto compiler team also showed me a technique
> for implementing object oriented concepts using RPG, which I've used a
> lot.
>
> For example, I use a generic service program to support combo boxes.
> The cboNew() procedure returns a pointer to a new instance of a combo
> box.  The cboAddItem() procedure adds new items to a combo box.  The
> cboToHTML() procedure renders a combo box as an HTML stream.  And so
> forth.
>
> While object instantiation is more common in object oriented languages,
> it's pretty easy to do in RPG, using data structures with basing
> pointers and %alloc(), where data structure subfields are used to store
> object properties.
>
> Nathan.
>
>
>
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