Hi,
Mohsen didn't forget the type bound (I can see his code).
Generic bounds such as "{T <: Reducible[S]}" do not work properly in the
compiler (there is already a JIRA opened for it, so no need to open another
one).
As a work around, I tried:
abstract class Adder[S] {
public abstract def getT() : Reducible[S];
...
}
but now I have a NPE:
Exception in thread "main" java.lang.NullPointerException
at x10.types.X10TypeEnv_c.typeEquals(X10TypeEnv_c.java:984)
I'm working to see if I can fix it quickly...
Thanks,
Yoav
On Tue, Jul 20, 2010 at 11:06 AM, Igor Peshansky <ig...@us.ibm.com> wrote:
> Mohsen Vakilian <reprogram...@gmail.com> wrote on 07/19/2010 06:41:20 PM:
>
> > I built the x10 compiler from trunk today (7/19) and used it to compile
> the
> > attached piece of code. The code implements a class that is
> parameterized by
> > a type that implements the Reducible interface. But, there are problems
> when
> > using the reducer in the finish statement. I've attached the error
> messages
> > that I get from the compiler. Could any one help me in fixing my
> program?
>
> Mohsen,
>
> You seem to be missing an attachment (Reducer.x10). The error indicates
> that
> you may have forgotten the type bound ({T <: Reducible[T]}) on a generic,
> but
> I would have to see the code to know for sure.
> Igor
> P.S. x10.lang.* is auto-imported, you don't need to import it explicitly.
> You do need to import x10.util.*.
>
> > [attachment "compile-error.txt" deleted by Igor Peshansky/Watson/IBM]
> --
> 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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