public abstract class State<T> where T : IStateMachine<T>
{
	public T context;

	protected void TransitionTo(State<T> nextState)
	{
		context.TransitionTo(nextState);
	}

	public virtual void OnEnter()
	{
	}

	public virtual void OnExit()
	{
	}
}

public interface IStateMachine<T> where T : IStateMachine<T>
{
	void TransitionTo(State<T> nextState);
}