Re: CallP Versus Program 'CALL'

Putting a CALLP, just to be clear, is like putting an EVAL on a free
format line. My boss (a .Net programmer) in days gone by could understand
a = B + C, but EVAL would have thrown him for a loop.

Sort of reminds me (now I'm showing my age) when in RPG II we could code
C ADD A B
Instead if
C B ADD A B

Which is clearer?

Jerry C. Adams
IBM i Programmer/Analyst
In a democracy the majority of the citizens is capable of exercising the
most cruel oppressions upon the minority. -Edmund Burke
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-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Brian Parkins
Sent: Saturday, February 09, 2013 6:33 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: CallP Versus Program 'CALL'

Having said that, you should not be doing either one. CALL, CALLB
and CALLP are all obsolete. What you should be doing is prototyping

the program calls.

Alan, maybe I have misunderstood one of the points you are making. Taking
you own example:

D CreateBFile...
D Pr ExtPgm('ABCPGM')
D PR_CustomerNumber...
D 8a Const
D PR_Amount...
D 7p 2 Const
/Free

CreateBFile('A0001':12.50);

CallP CreateBFile('A0001':12.50);

/End-Free

There is _no_ difference between the two lines of code which invoke the
CREATEBFILE routine – both are calling an external program. As Joe Pluta
indicated, the CALLP operation can be omitted in the same way that EVAL can
be omitted in free-format calculations. CALLP is far from obsolete.

I agree program calls should be prototyped. However, the omission of the
CALLP, (from program and procedure calls) is just a matter of syntax and
style. (Personally, I prefer the CALLP to be explicitly coded so as to
avoid any possible confusion with function usage, array references, etc.)

Brian Parkins.
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