Unity3d IEnumerator, Coroutines and Partial Function Application

example.cs

// Learning from https://codeblog.jonskeet.uk/2012/01/30/currying-vs-partial-function-application/

public void DoThings()
{
	Func<Vector3, PlayerController, IEnumerator> orig = MoveToLocationAction;
	var t = ApplyPartial(orig, data.eventObjects[0].point);
	var t1 = ApplyPartial(t, player);
	
	var tt = ApplyPartial(orig, data.eventObjects[1].point);
	var tt1 = ApplyPartial(t, player);

	StartCoroutine(DoActionItems(t1(), tt1()));
}

IEnumerator DoActionItems(params IEnumerator[] list)
{
  foreach(var item in list)
  {
    yield return StartCoroutine(item);
  }

  yield break;
}

IEnumerator MoveToLocationAction(Vector3 point, PlayerController player)
{	
  bool notArrived = true;

  player.Run();
  player.SetDestination(point);

  System.Action<PlayerController> lambda = (x) => {
    Debug.Log("Callback! " + x.name);
    notArrived = false;
    };

  player.OnArrivedEvent += lambda;

  while(notArrived)
  {
    yield return null;
  }

  Debug.Log("Arrived!");
  player.OnArrivedEvent -= lambda;

}

static Func<T2, T3, TResult> ApplyPartial<T1, T2, T3, TResult>
    (Func<T1, T2, T3, TResult> function, T1 arg1)
{
    return (b, c) => function(arg1, b, c);
}

static Func<T2, TResult> ApplyPartial<T1, T2, TResult>
    (Func<T1, T2, TResult> function, T1 arg1)
{
    return arg2 => function(arg1, arg2);
}

static Func<TResult> ApplyPartial<T1, TResult>
    (Func<T1, TResult> function, T1 arg1)
{
    return () => function(arg1);
}