Can I create a package with friendly modules

[Salih Dincer]

On Monday, 13 June 2022 at 06:05:03 UTC, Tejas wrote:
>
> Directory structure:
> ```sh
>
> src
> |
> |--- main_file.d
> |
> |---parent
>       |
>       |--- driver.d
>       |
>       |--- package.d
>       |
>       |--- thing
>              |
>              |--- package.d
>              |
>              |--- first.d
>              |
>              |--- second.d
>              |
>              |--- third.d
> ```
>
> Code :
> `src/main_file.d`:
> ```d
> import parent;
>
> void main()
> {
> 	func();
> }
> ```
>
> `src/parent/package.d`:
> ```d
> module parent;
>
> public import
> 	driver;
> ```
>
> `src/parent/driver.d`:
> ```d
> module parent.driver;
>
> import thing;
>
> void func()
> {
> 	S s;			// from third.d
> 	auto t = first.a;	// from second.d
> 	auto l = second.dbl;	// from first.d
> }
> ```
>
> `src/parent/thing/package.d`:
> ```d
> module parent.thing;
>
> public import
> 	first,
> 	second,
> 	third;
> ```
>
> `src/parent/thing/first.d`:
> ```d
> module thing.first;
>
> import second;
>
> static this()
> {
> 	a = second.g; // can also access symbols within neighbouring 
> modules
> }
> package(parent):
> int a;
> int b;
> string c;
> ```
>
> `src/parent/thing/second.d`:
> ```d
> module thing.second;
>
> package(parent):
>
> int g;
> char p;
> double dbl;
> ```
>
> `src/parent/thing/third.d`:
> ```d
> module thing.third;
>
> package(parent):
>
> struct S
> {
> 	int a;
> 	char c;
> 	string s;
> }
>
> private S private_struct; // can't access via parent package, 
> since marked private
> ```
>
> You run it via:
> `dmd -i -I=./parent -I=./parent/thing main_file.d`
> (I'm pretty sure it'll look far prettier using `dub`)
>
> Here, all the symbols that are within package `thing` are 
> visible to package `parent` as well, but not visible to any 
> other package/module

Thanks, we all appreciate your efforts...

SDB at 79