Re: Can I create a package with friendly modules

[Salih Dincer via Digitalmars-d-learn]

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@79