Are you sure?
user= (defprotocol A (foo [a b]))
A
user= (extend-protocol A (Class/forName [D) (foo [a b] [a b]))
nil
user= (pprint (foo (double-array [1 2 3]) 1))
[[1.0, 2.0, 3.0] 1]
user= (pprint (amap (float-array [1 2 3]) i ret (float (* 2 (aget ret
i)
[2.0, 4.0, 6.0]
My guess is you're not remembering to cast to the appropriate type in your
loop expression in amap.
For instance:
user= (amap (float-array [1 2 3]) i ret i)
IllegalArgumentException No matching method found: aset
clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:80)
Whereas you need:
user= (amap (float-array [1 2 3]) i ret (float i))
#float[] [F@6a636064
--Aaron
On Thu, Jun 13, 2013 at 12:57 PM, Jim - FooBar(); jimpil1...@gmail.comwrote:
more weirdness!
try this at your REPL:
-extend any protocol to some primitive array type - let's say 'doubles'
-while in the same namespace, try to use amap passing it an array of
floats and also type-hint it with ^floats
*
**IllegalArgumentException No matching method found: aset
clojure.lang.Reflector.invokeMatchingMethod (Reflector.java:80)*
the same would have happened if the protocol had been extended to floats
and tried to use amap with doubles. In fact any combination of primitive
types will fail. Only the type that has been extended will work. In the
above case that would be doubles. If we extended the protocol to longs then
only longs would work and so forth...
I'm almost certain that this is not intentional...any opinions?
Jim
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