RE: Eval with two equals?

["Jeff L. Love" <jllove@xxxxxxxxxxx>]

Thanks! That is what I suspected it was doing but just didn't know for
sure.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Joel Fritz
Sent: Tuesday, April 05, 2005 3:56 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Eval with two equals?


It would have been clearer with parens. This is why some languages have
an assignment operator and an equality comparison operator e.g. "=" and
"==". It's easy to mistake this for multiple assignment, but it's not.
An equivalent way would be:

if detsty = '1';
   *inu1 = *on;
endif;

All comparisons evaluate to *on or *off ('1' or '0').  You can assign
the value returned by a comparison to another variable. 


> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff L. Love
> Sent: Tuesday, April 05, 2005 1:42 PM
> To: rpg400-l@xxxxxxxxxxxx
> Subject: Eval with two equals?
>
> I just encountered a line of code I have never seen before
> and can't figure out exactly what it is doing.
>
> 
>
> C                   EVAL      *INU1 = DETSTY = '1'
>
> 
>
> The field DETSTY is a 1 char field described in a DSPF. What
> is the purpose of an Eval statement like this?
>
> 
>
> Thanks,
>
> Jeff
>
> 
>
> 
>
> 
>
> --
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