On Dec 7, 12:37 pm, Bob Hutchison <hutch-li...@recursive.ca> wrote:
> On 7-Dec-09, at 12:17 PM, Laurent PETIT wrote:
>
>
>
>
>
> > 2009/12/6 Bob Hutchison <hutch-li...@recursive.ca>
>
> >> On 6-Dec-09, at 3:46 PM, Meikel Brandmeyer wrote:
>
> >>> Hi,
>
> >>> Am 06.12.2009 um 21:29 schrieb Bob Hutchison:
>
> >>>> It turns out that dispatching on play.foo.Foo is the only way that
> >>>> works. I was hoping ::f/Foo or f/Foo would work too (maybe my alias
> >>>> is
> >>>> wrong??). Especially since, with aliasing in the user namespace, I
> >>>> can
> >>>> create a play.foo.Foo using f/Foo
>
> >>> Does the following work?
>
> >>> (ns play.foo)
> >>> (deftype Foo [])
> >>> (defmulti my-print type)
> >>> (defmethod my-print ::Foo [x] (println "Got a foo"))
>
> >>> (in-ns 'user)
> >>> ; Note: normally written as (require [play.foo :as f])
> >>> (alias 'f 'play.foo)
> >>> (def x (f/Foo))
> >>> (f/my-print x)
>
> >> Yes! Thanks! The dispatch on type rather than class is the trick. I
> >> actually ended up writing a macro, this is *much* better.
>
> > Please note that in clojure, it's the dispatch on the class that's the
> > "trick", not on the type ;-)
>
> Sorry, I don't understand what you mean. Could you expand on that a bit?
>
> Thanks,
> Bob
>
>
>
>
>
>
>
> >> Cheers,
> >> Bob
>
> >>> Sincerely
> >>> Meikel
>
> >> ----
> >> Bob Hutchison
> >> Recursive Design Inc.
> >>http://www.recursive.ca/
> >> weblog:http://www.recursive.ca/hutch
>
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> ----
> Bob Hutchison
> Recursive Design Inc.http://www.recursive.ca/
> weblog:http://www.recursive.ca/hutch

I think Laurent means that type should be the preferred/standard
mechanism, and class reserved for sneaking over to java-land.

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