Re: [Vala] casting out parameters

[Nor Jaidi Tuah <norjaidi tuah ubd edu bn>]

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