Even better, try this main instead the previous:
int main () {
IMixinInterface fooer = new NothingSpecialFooer();
fooer.foo();
fooer = new TheSpecialFooer();
fooer.foo();
return 0;
}
Here we use the interface as the type of the object to show
polymorphism with mixin happening.
It prints:
$ ./test
** Message: test.vala:5: fooed defaulty!
** Message: test.vala:13: dummy string
** Message: test.vala:22: fooed specially!
On Sun, Feb 28, 2016 at 7:24 PM, Felipe Lavratti <felipe...@gmail.com> wrote:
> Right, I see what u are asking now.
>
> Well, if you want to do Mixins in Vala, you'll have to do the "static"
> workaround, since it doesn't support by default:
> https://wiki.gnome.org/Projects/Vala/Tutorial#Mixins_and_Multiple_Inheritanae
>
> Now you want to do Mixing with Generics? Ok, add the generic argument to
> each Mixin method of your interface:
>
> public interface IMixinInterface : Object {
> public abstract void foo();
>
> public static T default_fooing<T>(T arg) {
> GLib.message("fooed defaulty!");
> return arg;
> }
> }
>
> public abstract class BaseFooer : Object, IMixinInterface {
> public virtual void foo() {
> var dummy_string = IMixinInterface.default_fooing<string>("dummy
> string");
> GLib.message(dummy_string);
> }
> }
>
> public class NothingSpecialFooer : BaseFooer {
> }
>
> public class TheSpecialFooer : BaseFooer {
> public override void foo() {
> GLib.message("fooed specially!");
> }
> }
>
> int main () {
>
> var fooer = new NothingSpecialFooer();
> fooer.foo();
>
> var fooer2 = new TheSpecialFooer();
> fooer2.foo();
>
> return 0;
> }
>
>
> This example doesn't cover BaseFooer taking a generic argument, if the
> example is not enough, please provide me more details about how is the
> generic argument used in BaseFooer.
>
> - Fanl
>
>
--
Skype: felipeanl
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