Re: JESS: Can't use funcalls in backchained patterns?

That's correct.

Furthermore, I want to generate (time) facts only if they are used in
the LHS of a rule, not in other uses of (k) patterns. That was the point
of using back-chain.
Another issue is that rules are added at runtime. I may have some rules
of the form

   (k (when ?w)
   (time (when =(+ ?w ...)))
   => ...

but also some other rules of the form

   (k (when ?w)
   => ...

Doing the
    &:(progn (schedule-time-alert (+ ?w 3000)) TRUE)
thing in all rules of the former type is just more troublesome.

But if that's the only solution, maybe I'll stick to it.

Thanks.

Henrique



Ernest Friedman-Hill wrote:
> It would, but then you'd need a second rule to actually act on the
> alert. I think Henrique was looking for a way to do it in one rule,
> imagining that there would be many triggers like this.
>
>
> On Jul 21, 2010, at 10:05 AM, Wolfgang Laun wrote:
>
>> Why wouldn't a simple
>>
>> (defrule r
>>   (k (when ?w))
>> =>
>>   (schedule-timer-alert (+ ?w 3000))
>> )
>>
>> be sufficient?
>>
>> -W
>>
>
> ---------------------------------------------------------
> Ernest Friedman-Hill
> Informatics & Decision Sciences, Sandia National Laboratories
> PO Box 969, MS 9012, Livermore, CA 94550
> http://www.jessrules.com
>
>
>
>
>
>
>
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Henrique Lopes Cardoso
DEI/FEUP
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PORTUGAL
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