Trying to call callable, debugger says function doesn't exist.

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,
1

Godot Version

4.2.2

Question

Hey all. Have recently been messing around with Godot and decided to try and create an “Action Queue” using Callables.

However I’ve been a bit stumped with an error I’ve gotten when I try to call “AddTest()” from the struct list.
I’m not very familiar with C# but I think it’s something to do with scope.

Code:

public struct ActionNode{
	public Callable Action {set;get;}
	
	public ActionNode(Callable action){
		this.Action = action;
	}
	
	public void AddParameter(Variant parameter){
		Callable temp = this.Action;
		this.Action = Callable.From(() => temp.Call(parameter));
	}
};

public partial class QueueHandler : Node
{
	private List<ActionNode> actionQueue = new List<ActionNode>();
	private int testNumber = 0;
	
	public override void _Ready(){
		actionQueue.Add(new ActionNode(false, "Add 1", new Callable(this, "AddTest")));
		actionQueue[0].AddParameter(1);
	}
	
	public void StepQueue(){
		actionQueue[0].Action.Call();
		actionQueue.RemoveAt(0);
	}
	
	private void AddTest(int toAdd){ testNumber += toAdd; }
}

The function works fine when called in _Ready(), but throws the debug error listed below when called from StepQueue(), which is connected to a Button signal.

GD.cs:366 @ void Godot.GD.PushError(string): Invalid call. Nonexistent callable 'Node(QueueHandler.cs)::AddTest'.
2

unless there is a reason for doing so, i would just use c# queues instead

using Godot;
using System.Collections.Generic;
[GlobalClass]
public partial class MyCsharp:Node {

	// a queue

	Queue<System.Action<int>> m_queue = new Queue<System.Action<int>>();


	// functions
	void MagicNumber1(int a_number) => GD.Print("called from MagicNumber1:", a_number);
	void MagicNumber2(int a_number) => GD.Print("called from MagicNumber2:", a_number);

	public MyCsharp() {


		// populate queue

		m_queue.Enqueue(MagicNumber1);
		m_queue.Enqueue(MagicNumber1);
		m_queue.Enqueue(MagicNumber2);
		m_queue.Enqueue((int a_number) => GD.Print("called from inline function:", a_number));
		m_queue.Enqueue(MagicNumber1);
		m_queue.Enqueue(MagicNumber2);
		m_queue.Enqueue(MagicNumber2);
		m_queue.Enqueue((int a_number) => GD.Print("called from inline function:", a_number));

		while(m_queue.Count > 0) {


			// remove from queue
			System.Action<int> v_action = m_queue.Dequeue();

			// invoke and pass int
			v_action(m_queue.Count);
		}
	}
}