> > Q2.
> > Any hope of getting the following replaced
> > with a better syntax? :-)
> > 
> >    Idle.add(async_function.callback);
> >    yield;
> > 
> > Why not simply:
> > 
> >    yield;
> > 
> > ?
> > 
> 
> Because 'yield' just stops the method until the callback resumes it. It
> does nothing else. You can for example wait for a signal this way.
> Resuming in an idle callback is just one of the possibilities.

Why not

yield Idle;

or even

yield until Idle;
                                          
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