TwigNodeCheckDeprecations.php

<?php

namespace Drupal\Core\Template;

use Twig\Compiler;
use Twig\Node\Expression\ArrayExpression;
use Twig\Node\Expression\ConstantExpression;
use Twig\Node\Node;

/**
 * A node that checks deprecated variable usage.
 *
 * @see \Drupal\Core\Template\TwigNodeVisitorCheckDeprecations
 * @see \Drupal\Core\Template\TwigExtension::checkDeprecations()
 */
class TwigNodeCheckDeprecations extends Node {
    
    /**
     * The named variables used in the template.
     */
    protected array $usedNames = [];
    
    /**
     * {@inheritdoc}
     */
    public function __construct(array $usedNames) {
        $this->usedNames = $usedNames;
        parent::__construct();
    }
    
    /**
     * {@inheritdoc}
     */
    public function compile(Compiler $compiler) {
        $usedNamesNode = new ArrayExpression([], $this->getTemplateLine());
        foreach ($this->usedNames as $name) {
            $usedNamesNode->addElement(new ConstantExpression($name, $this->getTemplateLine()));
        }
        $compiler->write("\$this->env->getExtension('\\Drupal\\Core\\Template\\TwigExtension')\n");
        $compiler->indent();
        $compiler->write("->checkDeprecations(\$context, ");
        $compiler->subcompile($usedNamesNode);
        $compiler->raw(");");
        $compiler->outdent();
    }

}