Actualización

vendor/symfony/expression-language/Expression.php

@@ -0,0 +1,40 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ExpressionLanguage;
+
+/**
+ * Represents an expression.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Expression
+{
+    protected $expression;
+
+    /**
+     * @param string $expression An expression
+     */
+    public function __construct($expression)
+    {
+        $this->expression = (string) $expression;
+    }
+
+    /**
+     * Gets the expression.
+     *
+     * @return string The expression
+     */
+    public function __toString()
+    {
+        return $this->expression;
+    }
+}