How would you implement this in D? (signals & slots)

[Gerald via Digitalmars-d-learn]

On Tuesday, 2 February 2016 at 15:59:06 UTC, Atila Neves wrote:
> Slots are named: the methods are slots. Signals can be named if 
> you use only one struct as the parameter, as above. The signals 
> would be String1 and String2, the slots watch1 and watch2.

What I meant is that the connect call didn't seem to tie you to a 
specific slot, it looked like it determined the slot based on the 
types which is potentially error prone. Kagamin showed an example 
of explicitly connecting to a named slot so I'm happy with that, 
I'm looking forward to re-writing my event handlers using this 
technique.

Always nice to learn something new.