Events in D

[Vadim Lopatin via Digitalmars-d]

On Tuesday, 29 August 2017 at 05:10:25 UTC, bitwise wrote:
> I needed some C# style events, so I rolled my own. Long story 
> short, the result was unsatisfactory.
>
> Library based events are inadequate for basically the same 
> reasons as library based properties (often suggested/attempted 
> in C++). The problem is that the properties/events don't have 
> access to the fields or methods of the containing object, and 
> as such, incur the cost of an extra pointer per event/property, 
> or worse, a delegate if custom behavior per event is needed, in 
> order to provide that access. One obvious example would be 
> synchronized properties/events.
>
> Anyways, I threw together some code while thinking about what 
> an event may look like in D:

DlangUI includes signal/slot event implementation.

https://github.com/buggins/dlangui/blob/master/src/dlangui/core/signals.d