Re: abstract static methods (again)
On Mon, 19 Oct 2009, Tomas Mikula wrote:
On Mon, 19 Oct 2009 21:05:05 +0100, Tom Anderson wrote:
http://urchin.earth.li/~twic/Code/MutuallyRecursiveGenerics/Vector.java
The VectorKind should also have two type parameters to get rid of
compiler warnings and to map Vectors to VectorKinds one-to-one:
abstract class
VectorKind<V extends Vector<V,K>, K extends VectorKind<V,K>>
It compiled without warnings for me - but then i'm on 1.5.
Anyway, this is not of any help for me, because you are obtaining the
VectorKind instance from an instance of Vector. If there is always an
instance of Vector at hand, I can obtain the zero directly from that
instance (just move the abstract zero() method you declared in
VectorKind to Vector). The problem is that there is not always an
instance at hand and it is cumbersome to artificially pass one.
What are you planning to do with this zero if you don't have any Vector
instances? I don't really buy your scenario.
tom
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