UnityEvent Dump Log

UnityEventExtensions.cs

using System.Runtime.CompilerServices;
using System.Text;
using UnityEngine;
using UnityEngine.Events;

namespace Giacomelli.Framework
{
    public static class UnityEventExtensions
    {
        [System.Diagnostics.Conditional("DEBUG")]
        public static void Dump<TArgument>(
            this UnityEvent<TArgument> instance,
            string eventName,
            [CallerFilePath] string filePath = null,
            [CallerLineNumber] int lineNumber = 0,
            [CallerMemberName] string memberName = null)
        {
            var listenersCount = instance.GetPersistentEventCount();
            var msg = new StringBuilder();

            msg.AppendFormat($"[UNITY EVENT DUMP]\n");
            msg.AppendFormat($"{filePath} ({lineNumber}): {memberName}\n");
            msg.AppendFormat($"\t- Listeners: {listenersCount}\n");

            for (int i = 0; i < listenersCount; i++)
            {
                msg.AppendFormat($"\t\t- Listener {i}: {instance.GetPersistentTarget(i)}.{instance.GetPersistentMethodName(i)}\n");
            }

            Debug.Log(msg.ToString());            
        }
    }
}

usage.cs

public UnityEvent<float> OnEnergyLost;

// ...

OnEnergyLost.Dump("OnEnergyLost");