C#•5mo ago

should state machine have ability to add/remove

are state machines meant to be dynamic? lets say i got deez:

c#
public class State<TArgs> 
{
  public event EventHandler<TArgs> OnEnter;

  public void Enter(object sender, TArgs e) 
  {
    OnEnter?.Invoke(sender, e);
  }

  public event EventHandler<TArgs> OnExit;

  public void Exit(object sender, TArgs e)
  {
    OnExit?.Invoke(sender, e);
  }
}

public class StateMachine<TArgs>
{
    private State<TArgs> _currentState;

    public State<TArgs> CurrentState
    {
        get
        {
            return _currentState;
        }
        set
        {

            if (_currentState != value)
            {
                if (_currentState is not null)
                {
                    _currentState.Exit(this, StateArguments);
                }
                
                value.Enter(this, StateArguments);

                _currentState = value;
            }

        }
    }

  //adding/removing omitted for brevity :trolol:
}

c#
public class State<TArgs> 
{
  public event EventHandler<TArgs> OnEnter;

  public void Enter(object sender, TArgs e) 
  {
    OnEnter?.Invoke(sender, e);
  }

  public event EventHandler<TArgs> OnExit;

  public void Exit(object sender, TArgs e)
  {
    OnExit?.Invoke(sender, e);
  }
}

public class StateMachine<TArgs>
{
    private State<TArgs> _currentState;

    public State<TArgs> CurrentState
    {
        get
        {
            return _currentState;
        }
        set
        {

            if (_currentState != value)
            {
                if (_currentState is not null)
                {
                    _currentState.Exit(this, StateArguments);
                }
                
                value.Enter(this, StateArguments);

                _currentState = value;
            }

        }
    }

  //adding/removing omitted for brevity :trolol:
}

2 Replies

Omnissiah•5mo ago

do you mean add/remove in the sense of chaining methods, or something else

LasseVK•5mo ago

It depends entirely on your definition of what "a state machine" is. On one hand, it could be a static "machine" that specifies exactly what happens if you do X in state Y. On the other hand, it could be a framework that allows you to create state machines, where you can specify what happens if you do X in state Y. In the first case, being able to modify it after the fact is probably not a feature. In the second case, probably it is.

Gaming

Programming

should state machine have ability to add/remove