Re: [Vala] Deriving classes from GLib.Thread

[Tal Hadad <tal_hd hotmail com>]

Yes, it's invalid because you inherit from compact class.

However, you pointing up an issue!
Shell ValaC give a "normal" error on inheritance?
e.g.:
"MThread.vala:1.1-3.18: error: class `MThread<T>' can't inherit from class `GLib.Thread',
since it's compact.
class MThread<T> : GLib.Thread<T>
                                        ^^^^^^^^^^^"
- Tal


> Date: Tue, 30 Apr 2013 10:44:49 -0400
> From: andrew benton675 gmail com
> To: richard wiedenhoeft gmail com
> CC: vala-list gnome org
> Subject: Re: [Vala] Deriving classes from GLib.Thread
>
> I believe that the problem that you are having is due to the fact that 
> GLib.Thread<T> is a compact class.  When classes are compact, it means 
> that you cannot inherit from them.
>
> For information on compact classes, look here: 
> https://live.gnome.org/Vala/ReferenceHandling#Memory_management_for_compact_classes_without_reference_counting
>  
>
>
> On 4/30/2013 6:43 AM, Richard Wiedenhöft wrote:
> > Hi,
> >
> > I am trying to add some functionality (e.g. an is_alive-method) to the
> > GLib.Thread class, but with the following code:
> >
> > class MThread<T> : GLib.Thread<T> {
> >          public MThread(string? name, ThreadFunc<T> func) {
> >                  base(name, func);
> >          }
> >
> >          public MThread.try(string? name, ThreadFunc<T> func) throws Error {
> >                  base.try(name, func);
> >          }
> > }
> >
> > I get the following error:
> >
> > MThread.vala:3.3-3.18: error: chain up to `GLib.Thread' not supported
> >          base(name, func);
> >          ^^^^^^^^^^^^^^^^
> > MThread.vala:7.3-7.10: error: The name `try' does not exist in the
> > context of `GLib.Thread<T>'
> >          base.try(name, func);
> >          ^^^^^^^^
> > MThread.vala:6.2-6.19: error: unable to chain up to private base constructor
> >      public MThread.try(string? name, ThreadFunc<T> func) throws Error {
> >      ^^^^^^^^^^^^^^^^^^
> > Compilation failed: 3 error(s), 0 warning(s)
> >
> > I found a similar issue in
> > https://mail.gnome.org/archives/vala-list/2009-October/msg00000.html but
> > it is not helping me very much. It just gives me
> > the idea, that my problem is something that is not as easily solved as
> > it sounds...
> >
> > Thanks for any help in advance
> >
> >
> >
> >
> > _______________________________________________
> > vala-list mailing list
> > vala-list gnome org
> > https://mail.gnome.org/mailman/listinfo/vala-list
>
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