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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