is private broken?

[jmh530]

On Tuesday, 10 October 2017 at 19:59:05 UTC, Jonathan M Davis 
wrote:
>
> There is - by putting them in a separate module. It was done 
> this way to avoid the extra complication of friend functions 
> that you get in C++, and the theory is that you're in control 
> of everything that's in your own module, [snip]

I hadn't realized this was the reason for it. Makes sense.