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()

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)

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

_subjects

dictionary should be typed differently.

Any help would be much appreciated

----
Full code extract below :

Events.cs2.39KB

C#•3y ago•

13 replies

Altef

Generic types and inheritance

subscribe()

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)

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

_subjects

dictionary should be typed differently.

Any help would be much appreciated

----
Full code extract below :

Events.cs2.39KB

Generic types and inheritance

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