Get superclasses at compile time

[Straivers via Digitalmars-d-learn]

Hello,

I'm working on an event system, and I want to be able to check if 
an event is a subclass of another event. How might I go about 
this? In essence, I'm looking to compress this:

static if (E == UserInputEvent || E == MouseEvent || E == 
MouseButtonEvent || E == MouseReleasedEvent)
{
    //MouseEvent => MouseButtonEvent => MouseReleasedEvent
    mreListeners[mrePtr] = listener;
    mrePtr++;
}

into something like this:

static if (isSuperclassOf!(MouseReleasedEvent, E))
{
    mreListeners[mrePtr] = listener;
    mrePtr++;
}

Thank you for your time.

-S