Hiding types

[Philippe Sigaud via Digitalmars-d-learn]

On Friday, 30 May 2014 at 19:54:00 UTC, safety0ff wrote:
> On Friday, 30 May 2014 at 19:50:43 UTC, Philippe Sigaud wrote:
>> Am I misunderstanding something or is that a bug?
>
> Try: auto foo() { return Hidden();}

I'm not seeing any difference? I'm still able to create a value 
of type Hidden in an external module.