RE: Overloading in RPG.

["Bartell, Aaron L. (TC)" <ALBartell@xxxxxxxxxxxxxx>]

>I still don't see any benefit to overloading. It seems like an opportunity
>for confusion.
Making programs modular gives opportunity for confusion.  A lot of things
could give opportunity for confusion if used incorrectly.  GOTO's anybody?


>I don't see how you have simplified maintenance any. You still have 4
>subprograms to maintain. 
These four programs each perform separate but related tasks.  If you find
that you are constantly updating all four programs in the same way you have
probably missed the concept of overloading.

>In addition, I don't see how there would be any guarantee that these
>routines would do the same thing, just because they have the same name. As
I
>understand it, they are entirely different.
Exactly!  Basically they are entirely different but they all have the same
name.  Maybe the examples given here are bad examples but there is
definitely a place for overloading in RPG.  Lets say I want to look up a
customer information record. Sometimes I only have the last name of the
customer, and sometimes I have the actual customer number, but I could call
#GetCustInfo with either the Last name or the customer number.  i.e.
#GetCustInfo(LastName) or #GetCustInfo(CustNo).  Do you see the advantage?

>I would prefer to have one procedure and do any necessary conversion in the
>program. 
I don't get what your example is trying to do???


>For example:
>       DDaysDur          PR             5I 0
>            D CharDate1                      8A
>            D CharDate2                      8A
>
>       C                   Eval      Cdate1 = Ndate1
>       C                   Eval      Days = DaysDur(Cdate1: Cdate2)
>
>
>Albert York    


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