How a class can know the current reference of itself?

[Pippo via Digitalmars-d-learn]

On Friday, 4 August 2017 at 09:58:34 UTC, Mike Parker wrote:
>
> Your first error is actually this line:
>
> callToMyFunction(ref this);
>
> You can't use ref in a function call, only in function 
> declarations. But once that's fixed, you've got other errors in 
> the code you've posted -- you've declared main to return int, 
> but you return nothing; you're using writefln without importing 
> it.
>
> Also, class references are *already* references, so you don't 
> need to declare the function parameters as ref. Finally, 
> although this is not an error, @property has no effect on 
> member variables. It only applies to member functions. Also, 
> you never assign a value to myProperty, so even when the errors 
> are fixed nothing is printed.

Perfect. I've missed some details (return from main and import 
std.stdio for example) to expose my problem :D

My mistake was the inappropriate use of "ref".

Thank you! :)