User first class callable syntax

[fabpot]

No description provided.

[GromNaN]

For the failing test, you can fix Twig\Parser::subparse() with something like this:

$tokenParser = match (true) {
    \is_array($test) => $test[0],
    $test instanceof \Closure => (new \ReflectionFunction($test))->getClosureThis(),
    default => null,
};
if ($tokenParser instanceof TokenParserInterface) {
    $e->appendMessage(\sprintf(' (expecting closing tag for the "%s" tag defined near line %s).', $tokenParser->getTag(), $lineno));
}

[fabpot]

For the failing test, you can fix Twig\Parser::subparse() with something like this:

$tokenParser = match (true) {
    \is_array($test) => $test[0],
    $test instanceof \Closure => (new \ReflectionFunction($test))->getClosureThis(),
    default => null,
};
if ($tokenParser instanceof TokenParserInterface) {
    $e->appendMessage(\sprintf(' (expecting closing tag for the "%s" tag defined near line %s).', $tokenParser->getTag(), $lineno));
}

I have added native support instead.