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digitalmars.D.learn - Namespaces like C++

reply Andrey <andrey kabylin.ru> writes:
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;
If it is impossible, then what is the best way to using 
namespaces in D? Should I naming my classes with prefix e.g. 
UIManager and UIWidget?
Jan 16
next sibling parent rjframe <dlang ryanjframe.com> writes:
On Mon, 16 Jan 2017 18:02:09 +0000, 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;
 If it is impossible, then what is the best way to using namespaces in D?
 Should I naming my classes with prefix e.g. UIManager and UIWidget?
You can do either a static import or renamed import. The static import requires using the fully-qualified name; renamed imports let you set a local name for the module. static import ui.widget; ui.widget.SomeWidget w; import mymanager = ui.manager; mymanager.uiManager m; For more information on modules see http://dlang.org/spec/module.html --Ryan
Jan 16
prev sibling parent reply Mike Parker <aldacron gmail.com> writes:
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.
Jan 16
parent Andrey <andrey kabylin.ru> writes:
On Monday, 16 January 2017 at 19:17:57 UTC, Mike Parker wrote:
 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.
Thanks! That did the trick!
Jan 16