|
midrange.com
Yes, but you missed the point in which I also pass this back to the program
which called me. For example I want to send back a message id USR0001, I
set that value. Now I need to call an API. Now I take the return back
from that API and update other subfields in my first error structure.
Or another example. I call an API to perform some function. The error
structure returns an error. I decide to handle this one using the message
handling API's, which have their own error structure. I don't want to have
to move everything out of one structure to a holding area just to say I am
only using one error structure. The qualified method is like using %found
versus %found(myfile). More than two lines of code past point of origin,
it still makes sense.
Rob Berendt
==================
Remember the Cole!
"Stone, Brad V
(TC)" To: "'RPG400-L@midrange.com'"
<RPG400-L@midrange.com>
<bvstone@taylorco cc:
rp.com> Subject: RE: Another V5R1
query... Qualified DSs
Sent by:
owner-rpg400-l@mi
drange.com
05/10/01 01:26 PM
Please respond to
RPG400-L
Couldn't you just use the same DS for calling different APIs? That's what
I
do. Check the error after the call, then you don't need it any more.
Brad
> -----Original Message-----
> From: rob@dekko.com [mailto:rob@dekko.com]
> Sent: Thursday, May 10, 2001 9:53 AM
> To: RPG400-L@midrange.com
> Subject: Re: Another V5R1 query... Qualified DSs
>
>
>
> And I have lot's of uses for the new qualified keyword. For
> example, I
> have programs I've designed to function like API's: output to a user
> space, pass back the error structure - that sort of rot. In
> these programs
> I'll have multiple copies of the error code data structure.
> One to return
> back to whom called my program and one or more to use when
> calling various
> API's. Now instead of having to redefine each subfield, or
> COPY/PASTE,
> COPY/PASTE, I can use the LIKEDS.
>
> With this, /free, and many other fine features of V5R1, I
> can't wait to get
> my production machines up to V5R1.
>
> Rob Berendt
>
> ==================
> Remember the Cole!
>
>
>
>
> Jon.Paris@hal.it
>
> Sent by: To:
> RPG400-L@midrange.com
> owner-rpg400-l@mi cc:
>
> drange.com Subject: Re:
> Another V5R1 query... Qualified DSs
>
>
>
>
> 05/09/01 03:07 PM
>
> Please respond to
>
> RPG400-L
>
>
>
>
>
>
>
>
>
>
> >> What's the difference between:
>
> >> 1. using the QUALIFED keyword on a DS
> >> 2. specifying PREFIX('dsname.')?
>
> >> Wouldn't they do exactly the same thing?
>
> No not really. In the first case the field name does not
> change - it can
> be identical in multiple DSs. It is referenced via qualification
> CurrentRec.PhoneNo and PreviousRec.PhoneNo.
>
> In the second case the field name is changed by sticking the prefix in
> front of it e.g. PhoneNo becomes CPhoneNo and PPhoneNo.
>
> Effectively it comes out to the same thing (effectiely two differently
> named fields) until you consider that with the qualified
> option you can now
> say that the PreviousRec DS is LIKEDS(CurrentRec) and all the
> fields and
> their sizes and names come along for the ride!
>
>
>
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