[Question] How to get Template Name using a TwigFunction

[WebDesignWorx]

I am in the process of upgrading Twig from v1 to v3.

I had a SimpleFunction for debug purposes and one of the things the function showed was the name of the template,

For Twig 1, the code looked like this:

$oTwig->addFunction(new Twig_SimpleFunction("debug_dump", 
   function ($mVar = '', $sCaption = '', $bVarDump = false) use ($oTwig) {
       return debug_dump($mVar, $sCaption, $bVarDump, $oTwig->getCompiler()->getFilename());
   }
)); 

For Twig 3, the code looks like this:

$oTwig->addFunction(new \Twig\TwigFunction("debug_dump", 
   function ($mVar = '', $sCaption = '', $bVarDump = false) use ($oTwig) {
       return debug_dump($mVar, $sCaption, $bVarDump /*, $oTwig->getCompiler()->getFilename() */ );
   }
)); 

I had to comment the 4th parameter because it breaks the execution of the script.
Is there a good replacement for this call I could use in its stead?

TIA

[WebDesignWorx]

I am really struggling with it because I want to implement this feature but I am not that good with complex OOP.

What I can do from within my above function is to access the Twig\Environment Object

When I print_r this object I get the content of the entire object.
What I would like to access directly are the following things:

    [name:Twig\Source:private] => list.twig
    [path:Twig\Source:private] => D:\Xampp_PHP8.2\htdocs\WBCE_CMS\wbce\modules\droplets\templates\list.twig

and

                    [45] => Twig\Token Object
                        (
                            [value:Twig\Token:private] => debug_dump
                            [type:Twig\Token:private] => 5
                            [lineno:Twig\Token:private] => 11
                        )

particularly "lineo" where "value" = debug_dump

Can anyone please help me to access these from the object?
Thanks in advance.

[stof]

With simple functions, there is no way to access this information.
If you want your debug_dump function to automatically receive the location of the dump, you will need to use a special node_class for your function to customize the way the function call is compiled (but be careful as it might be easy to break support for some Twig features that way if you are not careful).

[ericmorand]

I know I'm late, but isn't it as simple as declaring that your function requires the template to be passed as argument to it?

$oTwig->addFunction(new \Twig\TwigFunction("debug_dump", 
   function ($template, $mVar = '', $sCaption = '', $bVarDump = false) use ($oTwig) {
       return debug_dump($mVar, $sCaption, $bVarDump, $template->getTemplateName());
   }
), [
    'needs_template' => true
]); 

[stof]

There is no needs_template option.

[ericmorand]

Oh, true! Wasn't there one at some point? I'm sure remembering about it...

EDIT: Forget about it. I'm starting to confuse TwigPHP and Twing. 😅