Yes, it is in a fresh environment.
I find that the problematic example *does* work in the user namespace, but
it doesn't work in my segmented namespace (ns mister-rogers.wrappers, to be
really specific).
On Mon, Jul 30, 2018 at 3:34 AM, Nicola Mometto <brobro...@gmail.com> wrote:
> No, I just tested this on 1.9.0 and 1.8.0 and I get no reflection, as I'd
> expect.
>
> Are you testing this in a fresh environment?
>
>
> On 30 Jul 2018, at 11:31, Mark Engelberg <mark.engelb...@gmail.com> wrote:
>
> I'm using 1.9.0. Is this a behavior that recently changed?
>
> On Mon, Jul 30, 2018 at 3:28 AM, Nicola Mometto <brobro...@gmail.com>
> wrote:
>
>> Which version of clojure? This works fine in 1.10
>>
>> Clojure 1.10.0-master-SNAPSHOT
>> user=> (set! *warn-on-reflection* true)
>> true
>> user=> (definterface Interface (test []))
>> user.Interface
>> user=> (def p (proxy [Object Interface] [] (test [] 1)))
>> #'user/p
>> user=> (defn get-test [o] (.test ^Interface o))
>> #'user/get-test
>> user=> (get-test p)
>> 1
>>
>>
>> On 30 Jul 2018, at 11:26, Mark Engelberg <mark.engelb...@gmail.com>
>> wrote:
>>
>> Those fishy things were errors I made when simplifying and transcribing
>> the proxy to post, but I have it correct in my own code.
>>
>> Here's a more precise, tested minimal example:
>>
>> (definterface Interface (test []))
>> (def p (proxy [Object Interface] [] (test [] 1)))
>> (defn get-test [o] (.test ^Interface o))
>>
>> => (get-test p)
>> This throws an error that it can't cast the proxy to Interface.
>>
>> If you remove the ^Interface type hint, then get-test will work but will
>> trigger reflection.
>>
>> Thanks for looking at this. It seems like it should work, but it doesn't.
>>
>>
>> On Mon, Jul 30, 2018 at 3:06 AM, Nicola Mometto <brobro...@gmail.com>
>> wrote:
>>
>>> That's exactly what you should do and it does work, e.g.:
>>>
>>> user=> (set! *warn-on-reflection* true)
>>> true
>>> user=> (.meta ^clojure.lang.IMeta (proxy [clojure.lang.IMeta] [] (meta
>>> [] {:a 1})))
>>> {:a 1}
>>>
>>> In your small example you have two errors that might be fishy: a missing
>>> arg vector to pass to the super ctor and an extra `this` parameter in the
>>> method impl (proxy, unlike reify, is anaphoric and binds `this` for you)
>>>
>>>
>>> On 30 Jul 2018, at 10:56, Mark Engelberg <mark.engelb...@gmail.com>
>>> wrote:
>>>
>>> Let's say I have a proxy object:
>>>
>>> (def p (proxy [MyClass MyInterface] (interfaceMethod [this] ...)))
>>>
>>> Now, I want to call (.interfaceMethod p). How do I do this without
>>> reflection?
>>> I would have thought that (.interfaceMethod ^MyInterface p) would work,
>>> but this results in an error message that this proxy object cannot be cast
>>> to MyInterface.
>>>
>>>
>>>
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