Fix #2529: explicit protection package #3651

[Kagamin via Digitalmars-d-announce]

On Wednesday, 20 August 2014 at 14:40:34 UTC, Dicebot wrote:
> On Wednesday, 20 August 2014 at 14:36:59 UTC, Kagamin wrote:
>> As I see on the realistic example of datetime, which is BIG, 
>> we only need to split it into a flat set of files without an 
>> overly deep package hierarchy.
>
> We _may_ split it into flat set files (solving only part of the 
> problem) but it is desirable to have a deeper package 
> hierarchy. Package hierarchy is not just an encapsulation tool, 
> it is also a great way to simplify navigation and finding 
> needed modules - something that Phobos is current terrible at 
> exactly because of flat hierarchies.

And with an excessively deep folder structure it will be much 
more tedious to walk the whole thing. It's deep nesting, which 
will make things hard to find.