How to Compare 2 objects of the same class

[Mark via Digitalmars-d-learn]

On Saturday, 3 June 2017 at 22:38:31 UTC, Mark wrote:
...
> Thanks.

Actually, I got another question,

how Can I obtain the actual memory address of a class?

I'll still need to solve the problem of taking ints/floats/reals 
etc., as well as structs and classes and sending them right/left 
in the BST. :/


Thanks again.