Update Twig to v2.15.4

system/libs/Twig/Twig/Function.php

@@ -1,76 +1,14 @@
 <?php
 
-/*
- * This file is part of Twig.
- *
- * (c) Fabien Potencier
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
+use Twig\TwigFunction;
 
-use Twig\Node\Node;
+class_exists('Twig\TwigFunction');
 
-@trigger_error('The Twig_Function class is deprecated since version 1.12 and will be removed in 2.0. Use \Twig\TwigFunction instead.', E_USER_DEPRECATED);
+@trigger_error('Using the "Twig_Function" class is deprecated since Twig version 2.7, use "Twig\TwigFunction" instead.', \E_USER_DEPRECATED);
 
-/**
- * Represents a template function.
- *
- * Use \Twig\TwigFunction instead.
- *
- * @author Fabien Potencier <fabien@symfony.com>
- *
- * @deprecated since 1.12 (to be removed in 2.0)
- */
-abstract class Twig_Function implements Twig_FunctionInterface, Twig_FunctionCallableInterface
-{
-    protected $options;
-    protected $arguments = [];
-
-    public function __construct(array $options = [])
+if (false) {
+    /** @deprecated since Twig 2.7, use "Twig\TwigFunction" instead */
+    class Twig_Function extends TwigFunction
     {
-        $this->options = array_merge([
-            'needs_environment' => false,
-            'needs_context' => false,
-            'callable' => null,
-        ], $options);
-    }
-
-    public function setArguments($arguments)
-    {
-        $this->arguments = $arguments;
-    }
-
-    public function getArguments()
-    {
-        return $this->arguments;
-    }
-
-    public function needsEnvironment()
-    {
-        return $this->options['needs_environment'];
-    }
-
-    public function needsContext()
-    {
-        return $this->options['needs_context'];
-    }
-
-    public function getSafe(Node $functionArgs)
-    {
-        if (isset($this->options['is_safe'])) {
-            return $this->options['is_safe'];
-        }
-
-        if (isset($this->options['is_safe_callback'])) {
-            return \call_user_func($this->options['is_safe_callback'], $functionArgs);
-        }
-
-        return [];
-    }
-
-    public function getCallable()
-    {
-        return $this->options['callable'];
     }
 }