Here I have a file named: module.d

>import std.stdio   : writeln;
>
>void interestingFunction(){
>	writeln("Testing");
>}

There is no main() function since, I want to import this module, into another .d file.

( If I try to import and module.d does have main() function I get this error: )
> otherFile.d(13): Error: only one main, WinMain, or DllMain allowed. Previously found main at module.d(3)





I would like to launch function "interestingFunction()" directly using rdmd.
Is it possible to achieve that by any way?





I tried to launch the whole file, but it gave me some weird output:
>C:\Users\User\Desktop\Environment variables>rdmd module.d
>OPTLINK (R) for Win32  Release 8.00.17
>Copyright (C) Digital Mars 1989-2013  All rights reserved.
>http://www.digitalmars.com/ctg/optlink.html
>OPTLINK : Warning 134: No Start Address

On Thursday, 11 July 2019 at 09:43:55 UTC, BoQsc wrote:
> Here I have a file named: module.d
>
>>import std.stdio   : writeln;
>>
>>void interestingFunction(){
>>	writeln("Testing");
>>}
>
> There is no main() function since, I want to import this module, into another .d file.
>
> ( If I try to import and module.d does have main() function I get this error: )
>> otherFile.d(13): Error: only one main, WinMain, or DllMain allowed. Previously found main at module.d(3)
>
>
>
>
>
> I would like to launch function "interestingFunction()" directly using rdmd.
> Is it possible to achieve that by any way?
>
>
>
>
>
> I tried to launch the whole file, but it gave me some weird output:
>>C:\Users\User\Desktop\Environment variables>rdmd module.d
>>OPTLINK (R) for Win32  Release 8.00.17
>>Copyright (C) Digital Mars 1989-2013  All rights reserved.
>>http://www.digitalmars.com/ctg/optlink.html
>>OPTLINK : Warning 134: No Start Address

If you are trying to test a function separately from other functions, e.g. for testing, then you are approaching unit testing.
You could write a unit test block just under the function to test like
unittest
{
  interestingFunction;
}

and launch it via rdmd... don't know the syntax right now. But here is something:
https://stackoverflow.com/questions/10694994/rdmd-is-not-running-unit-tests

So, I assume something like
rdmd -unittest --main module.d

On Thursday, 11 July 2019 at 10:41:38 UTC, Alex wrote:
> On Thursday, 11 July 2019 at 09:43:55 UTC, BoQsc wrote:
>> Here I have a file named: module.d
>>
>>>[...]
>>
>> There is no main() function since, I want to import this module, into another .d file.
>>
>> ( If I try to import and module.d does have main() function I get this error: )
>>> [...]
>>
>>
>>
>>
>>
>> I would like to launch function "interestingFunction()" directly using rdmd.
>> Is it possible to achieve that by any way?
>>
>>
>>
>>
>>
>> I tried to launch the whole file, but it gave me some weird output:
>>>[...]
>
> If you are trying to test a function separately from other functions, e.g. for testing, then you are approaching unit testing.
> You could write a unit test block just under the function to test like
> unittest
> {
>   interestingFunction;
> }
>
> and launch it via rdmd... don't know the syntax right now. But here is something:
> https://stackoverflow.com/questions/10694994/rdmd-is-not-running-unit-tests
>
> So, I assume something like
> rdmd -unittest --main module.d

Hmm, maybe I'll just rename module.d to module_library.d and place it in a folder,
then create a new module_run.d file that would launch the functions of module_library.d

> module\module_library.d
> module\module_run.d
> README.md

Maybe even place a README.md file explaining how I come up with this idea.

And when in need of executing it, I'll just type:
> rdmd module\module_run.d