Christoph Pospiech <christoph.pospi...@de.ibm.com> wrote on 06/03/2010
01:50:13 AM:
> On Wednesday 02 June 2010 11:41:04 pm Yoav Zibin wrote:
> > The definition of reduce is:
> > def reduce(op:(T,T)=>T, unit:T):T
> >
> > You pass it a function with a guard:
> > ArrayD_add(s1:Array[Double],
> > s2:Array[Double])
> > *{s1.region() == s2.region(), s1.rail(), s2.rail()}*:
Array[Double]
> >
> > remove the guard, and it should fit.
> >
>
> Is there a type cast for function types ? Something along the lines
> ArrayD_add as op:(T,T)=>T ?
>
> Otherwise, I have to find a guard-free implementation for ArrayD_add...
You can always wrap it in a closure that casts appropriately, namely:
(x:Array[Double],y:Array[Double])=>ArrayD_add(x as Array[Double]{rail}, y
as Array[Double]{rail&®ion==x.region})
HTH,
Igor
--
Igor Peshansky (note the spelling change!)
IBM T.J. Watson Research Center
X10: Parallel Productivity and Performance (http://x10-lang.org/)
XJ: No More Pain for XML's Gain (http://www.research.ibm.com/xj/)
"I hear and I forget. I see and I remember. I do and I understand" --
Confucius
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