Source File package.d is a package module which contains import statements to import other modules.

How would one import a package.d module when keyword "package" is preventing that?

Example:

import package;

Error:

datatypes.d(1): Error: identifier expected following `import`
datatypes.d(1): Error: `;` expected

Extensive run.dlang.io example

Expected correct result if package.d was possible to import:

waffles/program.d(6): Error: `num` matches conflicting symbols:
waffles/testing1.d(1):        variable `testing1.num`
waffles/testing2.d(1):        variable `testing2.num`

Edit incorrect link to example:

Correct link:
https://run.dlang.io/is/Zbrn75

On Thursday, 2 November 2023 at 10:53:12 UTC, Arafel wrote:

--- waffles/program.d
import waffles;

Weirdly enough it does not work on Windows operating system.

program.d(1): Error: unable to read module `waffles`
program.d(1):        Expected 'waffles.d' or 'waffles\package.d' in one of the following import paths:
import path[0] = .
import path[1] = C:\D\dmd2\windows\bin\..\..\src\phobos
import path[2] = C:\D\dmd2\windows\bin\..\..\src\druntime\import
Failed: ["C:\\D\\dmd2\\windows\\bin\\dmd.exe", "-v", "-o-", "program.d", "-I."]

C:\waffles>dmd -i -run program.d
program.d(1): Error: unable to read module `waffles`
program.d(1):        Expected 'waffles.d' or 'waffles\package.d' in one of the following import paths:
import path[0] = C:\D\dmd2\windows\bin64\..\..\src\phobos
import path[1] = C:\D\dmd2\windows\bin64\..\..\src\druntime\import

On Thursday, 2 November 2023 at 11:12:58 UTC, BoQsc wrote:

--- waffles/program.d
import waffles;

void main()
{
    import std;

    writeln(num);
}

--- waffles/package.d
module waffles;

public import waffles.testing1;
public import waffles.testing2;

--- waffles/testing1.d
int num = 5;

--- waffles/testing2.d
int num2 = 9;

On Thursday, 2 November 2023 at 11:32:40 UTC, Imperatorn wrote:

--- waffles/program.d
import waffles;

void main()
{
    import std;

    writeln(num);
}

--- waffles/package.d
module waffles;

public import waffles.testing1;
public import waffles.testing2;

--- waffles/testing1.d
int num = 5;

--- waffles/testing2.d
int num2 = 9;

num and num2 was never a problem.

The current major problem is that it does not work on Windows operating system with either rdmd or dmd. While it does work on run.dlang.io.

On Thursday, 2 November 2023 at 11:57:57 UTC, BoQsc wrote:

--- waffles/program.d
import waffles;

void main()
{
    import std;

    writeln(num);
}

--- waffles/package.d
module waffles;

public import waffles.testing1;
public import waffles.testing2;

--- waffles/testing1.d
int num = 5;

--- waffles/testing2.d
int num2 = 9;

That's not all I changed. It works for me on Windows.

On Thursday, 2 November 2023 at 11:12:58 UTC, BoQsc wrote:

program.d(1): Error: unable to read module `waffles`
program.d(1):        Expected 'waffles.d' or 'waffles\package.d' in one of the following import paths:
import path[0] = .
import path[1] = C:\D\dmd2\windows\bin\..\..\src\phobos
import path[2] = C:\D\dmd2\windows\bin\..\..\src\druntime\import
Failed: ["C:\\D\\dmd2\\windows\\bin\\dmd.exe", "-v", "-o-", "program.d", "-I."]

C:\waffles>dmd -i -run program.d
program.d(1): Error: unable to read module `waffles`
program.d(1):        Expected 'waffles.d' or 'waffles\package.d' in one of the following import paths:
import path[0] = C:\D\dmd2\windows\bin64\..\..\src\phobos
import path[1] = C:\D\dmd2\windows\bin64\..\..\src\druntime\import

The problem is the directory you're running the command from. You need to run dmd from the parent directory of waffles.

Well the whole thread is about importing package.d while being inside package to provide runnable working example which contains debug information of the package.

Sidenote:
This is essentially useful when distributing over many machines/platforms via dub package manager.

You would want to have a source file inside the project that imports package.d and is runnable with well tested example behaviour.

Therefore the need to import package.d is needed and I can't see a solution, which means
that D Language might have to introduce a way to import package.d from inside the package, if there is a need to further improve experience of having a self-testing packages in both dub and package modules.