Altef
Altef
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Created by Altef on 12/17/2023 in #help
Generic types and inheritance
Hello, I am trying to implement a basic event bus to have a single point for subscribing and publishing events and keeping clients anonymous from each others. However I am having trouble defining type genericity for my event objects. Attached file is the complete code extract. The issue is raised at line 53 in subscribe() method when I try to add the event handler to my collection. 
private void subscribe<TEvent, TEventHandler>()
    where TEvent : Event
    where TEventHandler : IEventHandler<TEvent>, new()
{
    if (!_subjects.ContainsKey(typeof(TEvent)))
    {
        _subjects.Add(typeof(TEvent), new List<IEventHandler<Event>>());
    }
    _subjects[typeof(TEvent)].Add(new TEventHandler());
}
private void subscribe<TEvent, TEventHandler>()
    where TEvent : Event
    where TEventHandler : IEventHandler<TEvent>, new()
{
    if (!_subjects.ContainsKey(typeof(TEvent)))
    {
        _subjects.Add(typeof(TEvent), new List<IEventHandler<Event>>());
    }
    _subjects[typeof(TEvent)].Add(new TEventHandler());
}
I am getting this error : Argument 1: cannot convert from 'TEventHandler' to 'Events.IEventHandler<Events.Event>' (CS1503) I don't know if I should look around improving the type constraints or if my _subjects dictionary should be typed differently. Any help would be much appreciated 🙂 ---- Full code extract below :
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