Can i remove a specific delegate instance without a reference?

Unity Engine
1

So i’m new to delegates and i need to remove a specific item based on wether it returns true or false.
I am using the pub sub pattern.
I’m not even sure if i can call it an instance, i’m that new to it.

using UnityEngine;

public class Publisher : MonoBehaviour
{
    private delegate bool Delegate();
    Delegate del;

    public void AddSubscriber(Subscriber new_sub)
    {
        del += new_sub.Trigger;
    }

    public void RemoveSubscriber(Subscriber sub)
    {
        del -= sub.Trigger;
    }

    public void Publish()
    {
        del.Invoke();
    }
}

using UnityEngine;

public class Subscriber : MonoBehaviour
{
    protected int days;

    public bool Trigger()
    {
        if (days > 0)
        {
            days--;
            return false;
        }
        else
        {
            return true;
        }
    }
}

So if Trigger returns false it would have to get removed out of the del delegate.

Thanks in advance.

2

I think something like this?

    public void Publish()
    {
        foreach (Delegate individual in del.GetInvocationList()) {
          bool result = individual();
          if (!result) {
            del -= individual;
          }
        }
    }
3

You’re a bloody genius, thanks