+ Added cache, which speeds up the repetitive calculations

+ Returned variables, because they need for cached expressions

1 files changed, 25 insertions, 0 deletions

diff --git a/src/NXP/Classes/Token/TokenVariable.php b/src/NXP/Classes/Token/TokenVariable.php
new file mode 100644
index 0000000..ccd7c83
--- /dev/null
+++ b/src/NXP/Classes/Token/TokenVariable.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * This file is part of the MathExecutor package
+ *
+ * (c) Alexander Kiryukhin
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code
+ */
+
+namespace NXP\Classes\Token;
+
+/**
+ * @author Alexander Kiryukhin <alexander@symdev.org>
+ */
+class TokenVariable extends AbstractContainerToken
+{
+    /**
+     * @return string
+     */
+    public static function getRegex()
+    {
+        return '\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*';
+    }
+}