Re: [Vala] returning async func from a callback

[Evan Nemerson <evan coeus-group com>]

On Tue, 2015-01-27 at 04:10 +0800, MohanR wrote:
> On Mon, 2015-01-26 at 11:43 -0800, Mario Daniel Ruiz Saavedra wrote:
> > What about setting the Cancellable as a default null parameter?
> > Something like:
> >
> > public async book init(string[] args, Cancellable? cancellable = null)
>
> yes, cancellable will work perfectly as long as the caller catches the
> error. I'm trying to find out any way to make sure the caller get
> notified even if the caller don't pass a cancellable object and not
> catching the errors.

Why not just have the init function throw an exception?  A
GLib.IOError.CANCELLED would make sense…  If the consumer is written in
Vala they'll get a warning at compile time about forgetting to catch an
error, and an error at runtime if it gets thrown.


-Evan