Combining the two approaches:
(defn bounded-queue [size]
(with-meta (clojure.lang.PersistentQueue/EMPTY) {:bounded-size
size}))
then look for (get (meta q) :bounded-size) in the protocol. Nice ...
Thanks!
On Feb 17, 11:04 am, Alexandre Patry <[email protected]>
wrote:
> On 11-02-17 10:33 AM, pba wrote:> Not quite, the queue size needs to be
> passed in at instantiation time
> > for example you may want to have a 10 or 100 element queue depending
> > on the element type. What I'm looking for is to somehow decorate the
> > queue (or some other object) with behavior constraints (a la C++
> > traits) when the object is created.
>
> > Thanks!
>
> You can define a record like :
>
> (defrecord BoundedQueue [queue size])
>
> where queue is the decorated queue and then consider the size of the
> queue in your protocole extension.
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