Run-time reflection for class inheritance

[Michael Green]

On Sunday, 1 December 2019 at 14:42:46 UTC, Adam D. Ruppe wrote:
> You can get the type at runtime by simply casting it...
>
> if(auto c = cast(EventSocket) event) {
>    // is an event socket
> }

Thanks.

I guess you need to be careful about which order you do those 
tests so as not to cast to more general types before testing for 
specific ones.

I also came up with

```
     if (typeid(event) == typeid(EventTimer)) {
         // do something
     }
```

The reason I was leaning toward the first one is that it could be 
put in a switch as it's just string compares.

I guess having it cast as part of the check is useful.