Re: [Vala] casting out parameters

[pancake <pancake youterm com>]

Would love to see this dynamic casting supported by the language.. Should I open a bug?

----- Original message -----
> On Tue, 2010-05-25 at 11:12 +0200, pancake wrote:
> > How can I cast an out parameter?
> >
> > public class Foo {}
> > public class Bar : Foo {}
> >
> > void test(out Foo foo) {
> >       foo = new Bar ();
> > }
> >
> > void main() {
> >       Bar bar;
> >       test (out bar);
> > }
> >
> > a.vala:10.9-10.15: error: Argument 1: Cannot convert from `Foo' to `Bar?'
>
> More verbose error message: test(out Foo foo), considered
> as a black box, may assign to foo any descendant of Foo,
> not necessarily Bar.
>
> Try:
>       Foo x;
>       test (out x);
>       Bar bar = x as Bar;
>
> hand
> Nor Jaidi Tuah