How to get compatible symbol names and runtime typeid names for templated classes?

[cc]

On Tuesday, 3 May 2022 at 09:42:45 UTC, cc wrote:
> Given a runtime typeid, how can I get the equivalent 
> fullyQualifiedName without attempting to mangle the string 
> myself manually?  e.g. something I can pass to `Object.factory`.

Actually, looking at this further, does Object.factory even 
support templates?  I'm getting null returned from any attempt to 
instantiate a templated classname.