[feature/twig] WIP extension/lexer/some tokenparsers/nodes

PHPBB3-11598

phpBB/includes/template/twig/lexer.php

@@ -0,0 +1,42 @@
+<?php
+/**
+*
+* @package phpBB3
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+class phpbb_template_twig_lexer extends Twig_Lexer
+{
+	protected function lexExpression()
+	{
+		/**
+		* This is some compatibility code to continue supporting expressions such as:
+		* <!-- IF .blah -->
+		* 
+		* This does not seem very efficient, but I have not been able to find a better 
+		* 	method which works properly (maybe lexData can do it better, @todo test this)
+		*/
+		$last_element = end($this->tokens);
+		if ($last_element->getValue() === '.')
+		{
+			$last_element2 = prev($this->tokens);
+
+			if ($last_element2->getValue() === 'IF')
+			{
+				array_pop($this->tokens);
+			}
+		}
+        
+		parent::lexExpression();
+	}
+}