New With Struct and Getting Class Object Pointers

[Nicholas Wilson]

On Sunday, 30 September 2018 at 09:30:38 UTC, Vijay Nayar wrote:
> Is there a way to either have a constant reference to a class 
> that can be set to a new value, or is there a way to convert 
> the class variable to a class pointer?

Alex has mentioned Rebindable, which is the answer to your first 
question.
To answer your second question, no

class A {}

A a:

`a` is always a (possibly null) reference to a class instance. 
You can have pointers to class references (which is what `&a` 
gives you) but that has two indirections between the variable and 
the data, which if you want high perf is probably not what you 
are looking for.