Signals and Slots

[Tomas Lindquist Olsen]

Walter Bright wrote:
> http://www.digitalmars.com/d/std_signals.html
> 
> And that, hopefully, is that.

Is there any plans to support return values? This is much prettier 
compared to having an extra out parameter.

Consider a GUI. Sometimes you need to know when the event has been used 
and processing should stop...

Regarding the mixin issue I'm not sure what I think yet. A new 
'scope(instance) / scope(module)' keeps coming up in my head though.

All I want to mixin is the public interface, not the implementation!