How to dispatch a class function for an object accessed by handle?

[wjoe]

On Friday, 6 March 2020 at 15:19:39 UTC, Adam D. Ruppe wrote:
> On Friday, 6 March 2020 at 15:05:56 UTC, wjoe wrote:
>> But didn't like the string part and that's when I introduced 
>> the alias fn because I figured maybe it's possible to do 
>> something like:
>>   factory.dispatch!(Bitmap.load)(handle, path);
>> and get the Bitmap part from that alias and hence save the 
>> duplicate Bitmap type in factory.dispatch!(Bitmap, 
>> Bitmap.load)(...);
>
> ooh you can do that. on the alias, use __traits(identifier) to 
> get thef ucntion name and __traits(parent) to get the class 
> name! then it reduces to what we already wrote.

Awesome! I read the docs up and down but I couldn't figure it 
out. Thank you!