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

[Enjoys Math via Digitalmars-d-learn]

On Monday, 1 February 2016 at 21:40:45 UTC, Enjoys Math wrote:
> module signals_and_slots;
>
> import std.algorithm: remove;
>
> [...]


D's signals & slots:

https://dlang.org/phobos/std_signals.html