Singleton with Enum

How can i instantiate a enum for a machine state using singleton ?

This is my code:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GameSystem : MonoBehaviour {
5.  
6. private static GameSystem instance;
7.  
8. private GameSystem() { }
9.  
10.    public static GameSystem GetInstance
11.    {
12.       get
13.       {
14.          if (instance == null)
15.          {
16.              instance = new GameSystem();
17.          }
18.          return instance;
19.       }
20.    }
21.  
22.    public enum move
23.    {
24.        move_on,
25.        move_off
26.    }
27. }
28.  

and i can not instantiate the enum

 

Hello,

I'm not sure about your issue, you don't need to instantiate the enum class. You may need an object to store the enum value. Like

Code (csharp):

1.  
2. public move currentMove;
3. // so u can do a
4. currentMove = GameSystem.move.move_off;
5.  

 

That's also not a state machine. The whole point of a state machine implementation is to avoid the use of enums (well, one of the points anyway...)

 

More the enum does not fit for manipule a state machine ?

 

Generally, the goal is to avoid huge if-else or switch statements. They're impossible to read and maintain and it makes it very difficult to add new states or variations of states. In managed languages (like C#) it makes sense to have each state be its own class (unmanaged languages will sometimes have each state be a singleton so that the programmer doesn't have to worry about disposal - with the downside being that the owner of the state has to carry around some statefulness on its own).