From 4f5b44bd3bd490309eb2ba7b44df4769816ba729 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20L=C5=93uillet?= <nicolas.loeuillet@gmail.com>
Date: Sat, 3 Aug 2013 19:26:54 +0200
Subject: twig implementation

---
 .../Symfony/Bridge/Twig/NodeVisitor/Scope.php      | 135 +++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 vendor/symfony/twig-bridge/Symfony/Bridge/Twig/NodeVisitor/Scope.php

(limited to 'vendor/symfony/twig-bridge/Symfony/Bridge/Twig/NodeVisitor/Scope.php')

diff --git a/vendor/symfony/twig-bridge/Symfony/Bridge/Twig/NodeVisitor/Scope.php b/vendor/symfony/twig-bridge/Symfony/Bridge/Twig/NodeVisitor/Scope.php
new file mode 100644
index 00000000..ce27b6a6
--- /dev/null
+++ b/vendor/symfony/twig-bridge/Symfony/Bridge/Twig/NodeVisitor/Scope.php
@@ -0,0 +1,135 @@
+<?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\Bridge\Twig\NodeVisitor;
+
+/**
+ * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
+ */
+class Scope
+{
+    /**
+     * @var Scope|null
+     */
+    private $parent;
+
+    /**
+     * @var Scope[]
+     */
+    private $children;
+
+    /**
+     * @var array
+     */
+    private $data;
+
+    /**
+     * @var boolean
+     */
+    private $left;
+
+    /**
+     * @param Scope $parent
+     */
+    public function __construct(Scope $parent = null)
+    {
+        $this->parent = $parent;
+        $this->left = false;
+        $this->data = array();
+    }
+
+    /**
+     * Opens a new child scope.
+     *
+     * @return Scope
+     */
+    public function enter()
+    {
+        $child = new self($this);
+        $this->children[] = $child;
+
+        return $child;
+    }
+
+    /**
+     * Closes current scope and returns parent one.
+     *
+     * @return Scope|null
+     */
+    public function leave()
+    {
+        $this->left = true;
+
+        return $this->parent;
+    }
+
+    /**
+     * Stores data into current scope.
+     *
+     * @param string $key
+     * @param mixed  $value
+     *
+     * @throws \LogicException
+     *
+     * @return Scope Current scope
+     */
+    public function set($key, $value)
+    {
+        if ($this->left) {
+            throw new \LogicException('Left scope is not mutable.');
+        }
+
+        $this->data[$key] = $value;
+
+        return $this;
+    }
+
+    /**
+     * Tests if a data is visible from current scope.
+     *
+     * @param string $key
+     *
+     * @return boolean
+     */
+    public function has($key)
+    {
+        if (array_key_exists($key, $this->data)) {
+            return true;
+        }
+
+        if (null === $this->parent) {
+            return false;
+        }
+
+        return $this->parent->has($key);
+    }
+
+    /**
+     * Returns data visible from current scope.
+     *
+     * @param string $key
+     * @param mixed  $default
+     *
+     * @return mixed
+     */
+    public function get($key, $default = null)
+    {
+        if (array_key_exists($key, $this->data)) {
+            return $this->data[$key];
+        }
+
+        if (null === $this->parent) {
+            return $default;
+        }
+
+        return $this->parent->get($key, $default);
+    }
+}
-- 
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