Preparing for the New DIP Process

[FairEnough]

On Saturday, 27 January 2024 at 02:12:25 UTC, FairEnough wrote:
>
> ..
> Any answer to this question has to take into account the other 
> code in the module.

Of course, I can answer this question.

The code below demonstrates how D made it possible for me to make 
a mistake when I first used D (i.e. I had the unittest in the 
same module as the class).

Of course now I know, silly me, just put the unittest in its own 
file god-damitt!

But here is how that mistake could have been avoided without 
having to put that unittest in its very own module:

module someClass;

class C
{
     void increment() {++x;}
     private(this) int x;
}

unittest
{
     auto c = new C;
     c.x++; // it seems to me, that this is not what that 'type' 
expects.
     c.increment(); // Thanks private(this) for helping me not 
make that mistake.
}