Use the same code as both a Function and a Filter

[pgorod]

Suppose I have a bit of code to use in Twig as a custom Extension, and I have it defined twice, once as a Function, the other as a Filter.

So inside Twig I can use both of these

arg1|myExt(arg2)

myExt(arg1, arg2)

What is the proper way of creating these Extensions without duplicating the code that implements myExt?
I know I probably still need to have two classes, and register both separately in Twig, but I'd like to avoid duplicating the code of the run function that actually does the work.

In other words, how can I call my custom Function from inside my custom Filter, or vice-versa?

Thanks in advance for any guidance.

[stof]

A Twig extension can totally reuse the same PHP callable to implement a Twig filter and a Twig function:

<?php

// use statements omitted for brevity

class MyExtension extends AbstractExtension
{
    public function getFilters(): array
    {
        return [new TwigFilter('myExt', $this->myExt(...)];
    }

    public function getFunctions(): array
    {
        return [new TwigFunction('myExt', $this->myExt(...)];
    }

    public function myExt($arg1, $arg2)
    {
        // TODO implement the logic
    }
}

[pgorod]

Nice and clean! Thanks.