sarat poluri <sarat.pol...@gmail.com> wrote on 12/08/2009 05:31:02 PM:
> Hi,
>
> Could you please tell me the syntax to use templates in x10.
First off, which version of X10 are you using? The following is for
X10 2.0.
If by templates you mean generics, then here are some examples:
class C[T] { // generic class
private val x:T;
public def m(v:T):T { ... }
public static def g[U](v:U):U { ... } // generic method
}
The method g() above is static because we don't yet support generic
virtual methods.
Note that these aren't C++-style templates. In particular, you can't
access the type parameter in a static context, nor can you create an
instance of the type parameter, nor do you have structural resolution
of methods/fields/operators. Also, static methods live in the
non-generic incarnation of the class (thus, C.f(), not C[T].f()).
One can, however, constrain the type parameter to implement some
interface or extend some class, by adding a type constraint like
class C[T]{T <: I} { // generic class, T is constrained to
extend/implement I
...
}
Hope this helps,
Igor
--
Igor Peshansky (note the spelling change!)
IBM T.J. Watson Research Center
XJ: No More Pain for XML's Gain (http://www.research.ibm.com/xj/)
X10: Parallel Productivity and Performance (http://x10.sf.net/)
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