Joystick DPad axis to bool

Hello,

I want to have a class in the inspector to debug those variables.

I have problems on the get/set method in the declarisation section. Is there a way on how to set them at runtime without using in Update, just in the declarisation section?

 [System.Serializable]
 public class DPad {
     public bool left { get { return this; } set { Input.GetAxisRaw("DPAD_X") < 0; } }
     public bool right { get { return this; } set { Input.GetAxisRaw("DPAD_X") > 0; } }
     public bool up { get { return this; } set { Input.GetAxisRaw("DPAD_Y") > 0; } }
     public bool down { get { return this; } set { Input.GetAxisRaw("DPAD_Y") < 0; } }
 }
 [SerializeField]
 public DPad dpad;

 void Start() { ... }

This gives me an Only assignment, call, increment, decrement, and new object expressions can be used as a statement error.