Re: [Vala] casting out parameters

[Jürg Billeter <j bitron ch>]

On Wed, 2010-05-26 at 15:41 +0200, pancake wrote:
> Would love to see this dynamic casting supported by the language..
> Should I open a bug?

As Nor Jaidi Tuah wrote, the declaration of the method `test` does not
guarantee that `foo` is set to an instance of `Bar`. The method could
also be implemented as follows:

void test(out Foo foo) {
    foo = new Foo ();
}

If the compiler accepted your `main` method, you'd have a variable of
type Bar pointing to an object of type Foo, and this should never
happen. The compile error you get is intentional and not a bug.

Jürg