why mkdir can't create tree of dirs?

[Wyatt via Digitalmars-d-learn]

On Tuesday, 9 February 2016 at 20:20:59 UTC, Suliman wrote:
> It's look like that I can only create one nesting level sub 
> folder, for example there is exists dir: D:\foo
> I can't create dir D:\foo\bar\baz I can only create D:\foo\bar

http://dlang.org/phobos/std_file.html#.mkdirRecurse

-Wyatt