implicit conversion for this !

Victor NOEL schrieb:
> Is it possible to do something like this :

I think the language you are looking for is JavaScript, as the
object system of scala is based on classes and mixins instead of
prototypes and delegation, which seem to be what you are after.

- Florian

On Thu, Jan 15, 2009 at 05:03:57PM +0100, Florian Hars wrote:
> Victor NOEL schrieb:
> > Is it possible to do something like this :
>
> I think the language you are looking for is JavaScript, as the
> object system of scala is based on classes and mixins instead of
> prototypes and delegation, which seem to be what you are after.

That may be right !

I never saw it like that, but anyway, I can't go to javascript, it
will be java or scala, and for me, the later will always be better
than the former :)

But maybe there exists equivalent solution expressed in a
completely different way than what I wrote that take advantage of
classes and mixins !

(Or I can try to develop a scala plugin that introduce prototype
and delegation :)

Anyway, thanks you for your helps on my two problems, I will continue
investigate to do what I want without cloning prototyping and
delegation.

Victor

Hi Victor,

> Is it possible to do something like this :
> class B {
> def foo = "foo"
> }
>
> abstract class A(protected val b: B) {
> // Here I would like extending classes to get
> // access to b without knowing it is from b
> // nor write every delegation to every function available
> // in b
> implicit def this2B(thiz: this.type) : B = thiz.b
> }

Change this.type to A, ...

> class C(protected val b: B) extends A(b) {
> // Here I can use foo as if it was available in this, because
> // this was implicitly converted to B !
> def test = this.foo
> }

and remove the "protected val" from "b: B" and it sort of works. You can do
this.foo as you have written but not just plain foo.

-Mark