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

[Enjoys Math via Digitalmars-d-learn]

module signals_and_slots;

import std.algorithm: remove;

struct Slots(DelegateType, ArgTypes...) {
	this() {

	}

	// How would you implement this?
	void call(ArgTypes args) {
		foreach (dg; delegates)
			dg(args);
	}

	void connect(DelegateType slot) {
		foreach (dg; delegates) {
			if (dg == slot)
				return;
		}
		delegates ~= slot;
	}

	void disconnect(DelegateType slot) {
		for (uint k=0; k < delegates.length; k++) {
			if (delegates[k] == slot)
				delegates = delegates.remove(k);
		}
	}

private:
	DelegateType[] delegates;
}

=============================================================

How do you implement this template called like:
void onColorChange(in Color) {
    // do something with color
}
auto slots = Slots!(void delegate(in Color), Color);
slots.connect(&onColorChange);
auto color = Color(0.0, 1.0, 1.0, 1.0);
slots.call(color);

?

Thank you!