Maybe your objects could be defined by a map containing functions and objects.
So exampleAndList = {:fn and, :coll [a b c]}
And then eval goes through your objects recursively, using
(def eval [o]
(apply (:fn o) (map eval (:coll o))))
- with a special case that if o is not a map but say a Boolean you just return
itself
> On 14 Aug 2020, at 02:24, Jack Park <[email protected]> wrote:
>
>
> The problem:
>
> In Java, I have an interface IInferrable which is basically boolean eval();
>
> Any Java object which extends IInferrable, no matter what it is, will answer
> to eval() and return a boolean.
> The idea lies at the heart of an inference engine.
>
> But, I also define a class AndList which implements IInferrable and extends
> java.util.ArrayList<Inferrable>
>
> So, AndList, and its sibling OrList behave just like a List object, but also
> will answer to eval() by running the collection and dealing with what each
> element returns when it, too, is eval()'d.
>
> I'd really love to discover how to pull that off in Clojure.
>
> Many thanks in advance. -Jack
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