Thanks, I forwarded this stuff over to Rich. We appreciate people trying it
and reporting stuff!
On Wednesday, July 29, 2015 at 8:23:16 PM UTC-5, Mikera wrote:
>
> Hi Alex,
>
> 1.8.0-alpha3 is breaking core.matrix at the moment.
>
> Root cause appears to be related to how protocols are being handled when
> used with Java arrays:
>
> e.g. for the protocol implementation:
> (extend-protocol mp/PImplementation
> (Class/forName "[Ljava.lang.Object;")
> (implementation-key [m] :object-array)
> (meta-info [m]
> {:doc "Clojure.core.matrix implementation for Java Object arrays"})
> (new-vector [m length] (construct-object-vector (long length)))
> (new-matrix [m rows columns]
> (let [columns (long columns)
> m (object-array rows)]
> (dotimes [i rows]
> (aset m i (construct-object-vector columns)))
> m))
> (new-matrix-nd [m shape]
> (construct-nd shape))
> (construct-matrix [m data]
> (construct-object-array data))
> (supports-dimensionality? [m dims]
> (>= dims 1)))
>
> When called as:
> (clojure.core.matrix.protocols/construct-matrix (object-array 1) [1])
>
> Gives exception:
> VerifyError (class: clojure/core/matrix$eval10586, method: invokeStatic
> signature: ()Ljava/lang/Object;) Incompatible object argument for function
> call java.lang.Class.getDeclaredConstructors0 (:-2)
>
> On Thursday, 30 July 2015 06:51:18 UTC+8, Alex Miller wrote:
>>
>> Clojure 1.8.0-alpha3 is now available.
>>
>> Try it via
>> - Download:
>> https://repo1.maven.org/maven2/org/clojure/clojure/1.8.0-alpha3
>> - Leiningen: [org.clojure/clojure "1.8.0-alpha3"]
>>
>> Tuples have been disabled after further analysis of performance impacts.
>>
>> This alpha has initial support for direct linking which you can enable
>> with -Dclojure.compiler.direct-linking=true
>>
>> Direct linking allows functions compiled with direct linking on to make
>> direct static method calls to most other functions, instead of going
>> through the var and the Fn object. This can enable further optimization by
>> the jit, at a cost in dynamism. In particular, directly-linked calls will
>> not see redefinitions.
>>
>> In alpha3, clojure.core is compiled with direct linking by default and
>> therefore other namespaces cannot redefine core fns and have those
>> redefinitions seen by core code.
>>
>> Functions declared as dynamic will never be linked to directly.
>>
>> As with all alphas, this represents ongoing work-in-progress that is
>> subject to change.
>>
>
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