What is best way to get see function from separate file

[Jonathan Villa via Digitalmars-d-learn]

On Sunday, 10 April 2016 at 18:26:57 UTC, Suliman wrote:
> Sorry for wrong posting!
>
> I have got logger instance in App.d
>
> void main()
> {
> ...
>  FileLogger fLogger = new FileLogger("ErrorLog.txt");
>  foo();
> }
>
> utils.d:
> foo()
> {
> // I need logging here
> }
>
> Also I have file utils.d that include stand-alone functions 
> that is not in classes. In one of them I need to implement 
> logging.
>
> What is the best way to do it. I see only two way -- create new 
> Loggining instance. And second -- to import App.d as module, 
> because without importing I would not able to see Logger 
> instance.
>
> But both of this way is look ugly. Is there any best solution?

You could pass an argument of type FileLogger (probably better a 
pointer?)
foo ( FileLogger log )
{ }

Other whay is to leave FileLogger instance in a separated module:
logger.d
public static FileLogger fLogger;

App.d
import logger; //the module
void main()
{
     // generate instance
     logger = new FileLogger("ErrorLog.txt");
}

utils.d
import logger; // the module

foo ()
{
     fLogger...
}

I cannot think in other ways.

JV