RE: RPGV?

But the fact remains that if you introduce namespaces it opens > up the doors to OO in RPG.

To: rpg400-l@xxxxxxxxxxxx
Subject: RE: RPGV?
From: BMartin@xxxxxxxxxxxx
Date: Tue, 12 Jan 2010 11:50:22 -0500

You are right, javascript is fully OO without classes.... but it still has
namespacing. You can implement OO as classes/inheritance or
prototype/clonging, both are in practice today with classes being FAR more
prevelant. But the fact remains that if you introduce namespaces it opens
up the doors to OO in RPG. That is my point and no matter how pedantic
you get on language semantics it doesn't change the fact.


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777



john e <jacobus1968@xxxxxxxxxxx>
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RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>


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Subject
RE: RPGV?

Granted, actual "classes" won't exist in the language, and you won't get

inheritance.

Also, "classes" and "inheritance" also have nothing (well ok, someting ut
not essential) to do with OO.
Just concepts implemented in many OO languages.

Javascript i.e. is fully OO, but has no classes and (therefore) no
inheritance.

Yes, i'm in a pedantic mood today

To: rpg400-l@xxxxxxxxxxxx
CC: rpg400-l@xxxxxxxxxxxx; rpg400-l-bounces@xxxxxxxxxxxx
Subject: RE: RPGV?
From: BMartin@xxxxxxxxxxxx
Date: Tue, 12 Jan 2010 09:51:35 -0500

But Namespaces are indeed an OO concept. That is what you encapsulate
your Classes in. In java this is known as a Package. By introducing
namespaces you begin to flirt with the idea of offering more and more OO

features into the language. You can simulate a class using a data
structures and procedures. Offer overloading of procedure names and

this

really starts to take some shape.

Granted, actual "classes" won't exist in the language, and you won't get

inheritance. But if you offered Interfaces as someone else suggested

its

just another piece of the OO pie.


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777



john e <jacobus1968@xxxxxxxxxxx>
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RE: RPGV?







Namespaces / overloading has nothing to do with OO.
OO is all about encapsulation.
You don't encapsulate anything with namespaces/overloading.

OORPG... please

First try to make the current version of RPG a bit more sane...

And why bother, i never encountered an RPG programmer who even heard

about

terms like "encapsulation" or even "variable scoping", let alone use it.

To: rpg400-l@xxxxxxxxxxxx
Subject: Re: RPGV?
From: BMartin@xxxxxxxxxxxx
Date: Tue, 12 Jan 2010 08:40:59 -0500

So you want RPG to go OO?

This is essentially what you'll get if you allow procedure overloading

and

namespaces. At least you'll have almost all the language construct

to

make it happen. Coming from C/C++ in all my time in highschool and
college and then learning Java as well I'm quite fond of OO and really

miss it, so it wouldn't be so bad for me :D

I'm just wondering how the RPG lifers feel about this. Without a
background in an OO language I would think many RPGers would be a bit

lost

with Namespaces and Procedure overloading... just as most have bucked

the

idea of Modules/Service Progams. I'm not saying it shouldn't be done.

I

very much support it, but I just hope everyone realizes that it'll be
another one of those 30% adoption situations again (or whatever the

case

is for service programs).


Thanks
Bryce Martin
Programmer/Analyst I
570-546-4777



Larry Ducie <larry_ducie@xxxxxxxxxxx>
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01/12/2010 06:34 AM
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Subject
Re: RPGV?







Hi Hans,

My two cents on this:

The DCL keyword: This would make my RPG look like CL. That alone would

kill it for me.
Comma vs Colon: Only a proctologist would really care.
Calc Spec V: Already free so we just lose the /free and /end-free and

make

it compulsory.

At this point in time I really don't think I would want my $100 spent

on

freeing RPG. It is functionality I want, not lipstick.

I would spend my money on:

1) Overloading sub-procedures ($75)
This is an obvious need and is well overdue.

2) Namespaces for Service Programs and Modules ($20)
I would like to have a NAMESPACE keyword (H-spec) for a SRVPGM or

MODULE

and then qualify a procedure with that namespace. This would allow me

to

reference two service programs that export a similarly named

subprocedure

and not have conflicts.

For example, two SRVPGMS export a getName procedure. This conflict is
solved with the following two lines:
NAMESPACE(MYSRVPGM1 : 'Contact')
NAMESPACE(MYSRVPGM2 : 'Customer')

I could then have:

contactName = Contact::GetName(parm);
customerName = Customer::GetName(parm);


We REALLY need this. We use so many SRVPGMS and it just gets harder

and

harder to keep procedure names unique across our SRVPGMs. We simply
shouldn't have to.

3) Ability to put a Binding Directory into another Binding Directory

($5)

We have lots of Service Programs, and we generate quite complex
inter-dependencies. For our prototype copybooks we can copy our

prototypes

into other copybooks to form new (more complex) copybooks.

Unfortunately,

we can't do the same with our Binding Directories. This is a real

pain.

Example:
A Person 'object' is implemented in three SRVPGMS. Each has its own
copybook and Binding Direcory. To include the Person objects in a

program

we use a /include of the PERSON copybook (which includes a /include of

the

three SRVPGM copybooks). We also reference the PERSON Binding

Directory.

This doesn't reference the theee original Binding Directories (because

it

can't) so it has to list the three SRVPGM objects again. If we split

one

of the original SRVPGMS into two we would have issues. The copybook is

easy because we reference the two new copybooks in the original and

all

copybooks built on it would get the new values. However, ALL of the
Binding Directories that list the original SRVPGM have to be found and

amended. This could be solved by simply amending the original Binding
Directory to include a refenrece to the two new Binding Directories

and

letting all references filter through. Just want to keep it

consistent.

Hope that all makes sense, and Happy New Year!

Cheers

Larry Ducie



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