True value semantics for class or struct?

[js.mdnq]

Simple values are ones that act atomically and use the standard 
mathematical operations.

Suppose I would like to wrap an int with additional functionality:

struct SmartInt{
     privatedata
     int Value;
     methods
}

The idea is that SmartInt semantics are treated identical to 
SmartInt.Value

So SmartInt = 3; is identical to SmartInt.Value = 3;

But since it is a smart int we can do

SmartInt.SomeMethod()

Also, when a the struct is copied I might not want to copy 
privatedata as it might change the functionality(maybe instead of 
copying I want it to be set to 0, through a constructor, or 
method).

The main purpose though, is to treat SmartInt and SmartInt as one 
and the same semantically. As far as I'm concerned, SmartInt is 
an int... I just "wrapped" it up with some nice functions.

Is anything like this possible in D?