--- /dev/null
+<?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\Node;
+
+use Symfony\Component\ExpressionLanguage\Compiler;
+
+/**
+ * Represents a node in the AST.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Node
+{
+ public $nodes = array();
+ public $attributes = array();
+
+ /**
+ * Constructor.
+ *
+ * @param array $nodes An array of nodes
+ * @param array $attributes An array of attributes
+ */
+ public function __construct(array $nodes = array(), array $attributes = array())
+ {
+ $this->nodes = $nodes;
+ $this->attributes = $attributes;
+ }
+
+ public function __toString()
+ {
+ $attributes = array();
+ foreach ($this->attributes as $name => $value) {
+ $attributes[] = sprintf('%s: %s', $name, str_replace("\n", '', var_export($value, true)));
+ }
+
+ $repr = array(str_replace('Symfony\Component\ExpressionLanguage\Node\\', '', get_class($this)).'('.implode(', ', $attributes));
+
+ if (count($this->nodes)) {
+ foreach ($this->nodes as $node) {
+ foreach (explode("\n", (string) $node) as $line) {
+ $repr[] = ' '.$line;
+ }
+ }
+
+ $repr[] = ')';
+ } else {
+ $repr[0] .= ')';
+ }
+
+ return implode("\n", $repr);
+ }
+
+ public function compile(Compiler $compiler)
+ {
+ foreach ($this->nodes as $node) {
+ $node->compile($compiler);
+ }
+ }
+
+ public function evaluate($functions, $values)
+ {
+ $results = array();
+ foreach ($this->nodes as $node) {
+ $results[] = $node->evaluate($functions, $values);
+ }
+
+ return $results;
+ }
+}