Re: FOR loop limit

Mark,

Do you mean literals assigned to vairables that are uesd for the "from" "to" "by" values, or actual literals in the construct?

i.e.

For x = 1 to 999 by 10;
...
endfor;

or (BTW, I was surprised the following compiled with my reckless field naming, but I digress :-)

from=1;
to=999;
by=10;

For x=from to to by by;
...
Endfor;

If the former, then yes, I can see that in that instance the compiler might possibly be able to know, although I'm not sure I really think it should have to...

Crispin.

----- Original Message ----- From: "Mark S. Waterbury" <mark.s.waterbury@xxxxxxx>
To: "RPG programming on the IBM i / System i" <rpg400-l@xxxxxxxxxxxx>
Sent: Thursday, January 29, 2009 4:23 PM
Subject: Re: FOR loop limit

Hi, Crispin:

No, I was not thinking of anything like that.

But the compiler should be able to detect if a FOR loop coded with
literal numbers specified for the "from" and "to" limits and "by" value
will exceed the size of the index variable, especially if it is a
"packed decimal" type. In other words, based on the size required to
store the "to" value, plus the "by" value, apparently, the way RPG IV
works... :-o

Cheers,

Mark

Crispin Bates wrote:
Mark,

Are you suggesting that the compiler should be able to follow program logic
to determine what the value of the limit is prior to the for loop? That
value could have been set anywhere in the program before the loop was hit.
Yes, in the simple example it was the statement before, but...

Maybe I missed your point :-)

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