class Key
{
    private:
        int state;
    public:
        bool up();
        bool down();
        bool dead();
}

class EventObject
{
    private:
        SDL_Event event;
        int type; //Event type, keyboard, mouse, joystick/gamepad
        int eventKey; //Which key the event is from
    public:
        bool poll(); //Poll for an event
        int getKey(); //Return which key the event took place at
        KeyObject key; //An updated key object
};

EventObject::poll()
{
    SDL_PollEvent(event);
    
    //[sudo code]
    if event is a keyevent
    {
        update type;
        update eventKey; //Which key the event came from
        
        update the key; //update the key itself

    }

    if an event took place
    {
        return true;
    }
    
    return false;
    //[/sudo code]
}

inputEngine.Update(EventObject &event)
{
    if (event.type == KEY_EVENT)
    {
        Keyboard.Keys[event.getKey()] = event.key; //Just the single key is updated
    }
}