How to return a function in C#?

Hi, I'm trying to build an ability system, where I come up with a structure that in my main script component, I have a function called "DoSkill()", and I have would have variable to store an enum SkillType "currentSkill".

The SkillType is an enum I defined in another script component called "SkillManager", My SkillManager have a function called FindSkill(SkillType currentSkill).

So I'm gonna call FindSkill(SkillType currentSkill) in my main script component's DoSkill(), and then in SkillManager's FindSkill(SkillType currentSkill), this would do a switch statement to find the correct skill function I pre-defined in SkillManager to return. And then in my main script component, I can use the function returned by FindSkill(SkillType currentSkill)

For example: I defined "Vector3 Dash(float currentTime)" in SkillManager, and I defined enum SkillType {Dash}. In my main script component, I want to

Code (csharp):

1.  
2. SkillType currentSkill = SkillManager.SkillType.Dash;
3. float currentTime = 0.5f;
4. DoSkill() {
5.    var theRightFunction = FindSkill(currentSkill);  // Where theRightFunction should be Dash(float currentTime)
6.  
7.    // And then I can do like this
8.    Vector3 answer = theRightFunction(currentTime);
9. }
10.  

I wonder if I'm able to do this. And how should I write my FindSkill. Thanks

 

You can do this with delegates.

Here is a super bare bones example of passing a function around using the C# default `Action` void delegate:

Code (CSharp):

1. public enum SkillTypes
2. {
3.     SpecialSkill,
4. }
5.  
6. private Dictionary<SkillTypes, Action> actions;
7.  
8. // function to be passed around
9. private void SpecialSkill()
10. {
11.     Debug.Log("SpecialSkill Used");
12. }
13.  
14. // example of assigning it into a dictionary
15. private void AddSkill()
16. {
17.     actions.Add(SkillTypes.SpecialSkill, SpecialSkill); // add the function to the dictionary
18. }
19.  
20. // looking it up and returning it
21. private Action FindSkill(SkillTypes type)
22. {
23.     return actions[type];
24. }
25.  
26. // using it
27. private void DoSkill(SkillTypes type)
28. {
29.     Action theSkill = FindSkill(type);
30.     theSkill();
31. }

 

You should use code tags to make your post a tad more readable. That said, you can use a lambda expression to achieve this. As well as what has been noted above with delegates. It depends on the complexity of your code.