Thread overview
How to import & export modules
2 days ago
userTY
1 day ago
Mike Parker
2 days ago
Hi all,
I am practicing D by writting a win API gui wrapper. I want to use a single module import to use this Gui lib. Say i have 10 modules like--
"App.d, Form.d, Button.d, Label.d, TextBox.d, ComboBox.d, ListBox.d, CheckBox.d, Panel.d, DateTimePicker.d"
In Nim, i can import and export all these modules in a separate single module and then i only need to use that module. Say i have a special module named "GuiLib.nim" And inside that  if i write like this--
import
App
Form
Button
....

export
import
App
Form
Button
....

Then in my main file, i only need to import the "GuiLib". How is this possible in D ?
2 days ago
On Sunday, 10 November 2019 at 23:53:22 UTC, Vinod K Chandran wrote:
> Hi all,
> I am practicing D by writting a win API gui wrapper. I want to use a single module import to use this Gui lib. Say i have 10 modules like--
> "App.d, Form.d, Button.d, Label.d, TextBox.d, ComboBox.d, ListBox.d, CheckBox.d, Panel.d, DateTimePicker.d"
> In Nim, i can import and export all these modules in a separate single module and then i only need to use that module. Say i have a special module named "GuiLib.nim" And inside that  if i write like this--
> import
> App
> Form
> Button
> ....
>
> export
> import
> App
> Form
> Button
> ....
>
> Then in my main file, i only need to import the "GuiLib". How is this possible in D ?

You must use a module that has public imports.
Public imports are visible from the module that contain them but most importantly from the module that imports the module containing the public imports.

---
module all;

public import App, Form, Button;
---

---
module app;

import all; // can see App, Form and Button exported (public) symbols
---

See the specifications [1] for more comprehenssive details.

[1]: https://dlang.org/spec/module.html#public_imports
1 day ago
On Monday, 11 November 2019 at 01:28:54 UTC, userTY wrote:
> On Sunday, 10 November 2019 at 23:53:22 UTC, Vinod K Chandran wrote:
>> [...]
>
> You must use a module that has public imports.
> Public imports are visible from the module that contain them but most importantly from the module that imports the module containing the public imports.
>
> ---
> module all;
>
> public import App, Form, Button;
> ---
>
> ---
> module app;
>
> import all; // can see App, Form and Button exported (public) symbols
> ---
>
> See the specifications [1] for more comprehenssive details.
>
> [1]: https://dlang.org/spec/module.html#public_imports

Just a nitpick, prefer to use D style: https://dlang.org/dstyle.html

Modules are essentially files. So keeping them lower case makes it easier.
1 day ago
On Monday, 11 November 2019 at 01:28:54 UTC, userTY wrote:

>
> import all; // can see App, Form and Button exported (public) symbols
> ---

The approach of using an "all" module is an old hack that is no longer necessary. Today, the way to approach is to use a "package module".

https://dlang.org/spec/module.html#package-module

Given a package "mylib" containing multiple modules, create a file "mylib/package.d". Use the package name as the module name and follow it with your public imports:

module mylib;

public import mylib.foo, mylib.bar, mylib.baz;

Then users of the package can simply:

import mylib;