Namespaces like C++

[Mike Parker via Digitalmars-d-learn]

On Monday, 16 January 2017 at 18:02:09 UTC, Andrey wrote:
> Hello, can I using namespaces like in C++, for example: 
> ui::Widget or ui::Manager? I created ui/widget.d and 
> ui/manager.d for implementation classes Widget and Manager, bun 
> I can't import their correctly for using ui.Manager uiManager;

It should be:

ui.manager.Manager uiManager;

D namespaces generally follow the format [package 
names].moduleName.Type. So to have ui.Manager, then either the 
module, not the package, needs to be named 'ui', or you need to 
do the following:

// file ui/package.d
module ui;
public import ui.manager;

// file ui/manager.d
module ui.manager;
class Manager {}

Then you should be able to use ui.Manager and bypass the module 
name. The alternatives of static and named imports also work, but 
they need to be repeated in every module in which you want to use 
them.