add Twig & refactor poche

inc/Twig/Extensions/Grammar/Constant.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of Twig.
+ *
+ * (c) 2010 Fabien Potencier
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+class Twig_Extensions_Grammar_Constant extends Twig_Extensions_Grammar
+{
+    protected $type;
+
+    public function __construct($name, $type = null)
+    {
+        $this->name = $name;
+        $this->type = null === $type ? Twig_Token::NAME_TYPE : $type;
+    }
+
+    public function __toString()
+    {
+        return $this->name;
+    }
+
+    public function parse(Twig_Token $token)
+    {
+        $this->parser->getStream()->expect($this->type, $this->name);
+
+        return $this->name;
+    }
+
+    public function getType()
+    {
+        return $this->type;
+    }
+}