I think you've just formatted your code incorrectly. Did you try something
like this?
(extend-type js/Packages.clojure.lang.IFn
IFn
(-invoke
([this] (.invoke this))
([this a] (.invoke this a)))
)
On Sat, Dec 29, 2012 at 8:22 PM, Stuart Campbell <stu...@harto.org> wrote:
> Hi all,
>
> I'm toying with a way to use Clojure objects from a Rhino-based
> ClojureScript environment (https://github.com/harto/rhino-bridge).
>
> I've been able to export a Clojure function into the ClojureScript
> environment without too much difficulty. Ideally, I'd like to be able to
> call that function as if it were a regular ClojureScript function.
>
> I was hoping I could do something like:
>
> (extend-type js/Packages.clojure.lang.IFn
> IFn
> (-invoke [this] (.invoke this))
> (-invoke [this a] (.invoke this a))
> ;; etc
> )
>
> However, this yields an error that I don't quite understand:
>
> java.lang.UnsupportedOperationException: nth not supported on this type:
> Symbol
> at clojure.lang.RT.nthFrom(RT.java:846)
> at clojure.lang.RT.nth(RT.java:796)
> at
> cljs.core$extend_type$assign_impls__7365$fn__7377$adapt_params__7380.invoke(core.clj:486)
> at clojure.core$map$fn__4087.invoke(core.clj:2434)
>
> In fact, I'm not sure this will work at all, since (type) doesn't appear
> to work with non-native JS objects.
>
> Is the extend-type method feasible?
>
> Cheers,
> Stuart
>
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