From 84f3f967b71fc39bf61be13e46c89158ad0a34a9 Mon Sep 17 00:00:00 2001
From: Bruce Wells <bruce.wells@simparel.com>
Date: Wed, 27 Nov 2019 11:39:51 -0500
Subject: Update README.md and more function support

---
 src/NXP/Classes/Token/TokenNotEqual.php | 53 +++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 src/NXP/Classes/Token/TokenNotEqual.php

(limited to 'src/NXP/Classes/Token/TokenNotEqual.php')

diff --git a/src/NXP/Classes/Token/TokenNotEqual.php b/src/NXP/Classes/Token/TokenNotEqual.php
new file mode 100644
index 0000000..21c9454
--- /dev/null
+++ b/src/NXP/Classes/Token/TokenNotEqual.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace NXP\Classes\Token;
+
+use NXP\Exception\IncorrectExpressionException;
+
+class TokenNotEqual extends AbstractOperator
+{
+    /**
+     * @return string
+     */
+    public static function getRegex()
+    {
+        return '\!\=';
+    }
+
+    /**
+     * @return int
+     */
+    public function getPriority()
+    {
+        return 140;
+    }
+
+    /**
+     * @return string
+     */
+    public function getAssociation()
+    {
+        return self::LEFT_ASSOC;
+    }
+
+    /**
+     * @param InterfaceToken[] $stack
+     *
+     * @return $this
+     *
+     * @throws \NXP\Exception\IncorrectExpressionException
+     */
+    public function execute(&$stack)
+    {
+        $op2 = array_pop($stack);
+        $op1 = array_pop($stack);
+
+        if ($op1 === null || $op2 === null) {
+            throw new IncorrectExpressionException("!= requires two operators");
+        }
+
+        $result = $op1->getValue() != $op2->getValue();
+
+        return new TokenNumber($result);
+    }
+}
-- 
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