diff vendor/psy/psysh/src/Psy/CodeCleaner/LeavePsyshAlonePass.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/psy/psysh/src/Psy/CodeCleaner/LeavePsyshAlonePass.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\CodeCleaner;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\Variable;
+use Psy\Exception\RuntimeException;
+
+/**
+ * Validate that the user input does not reference the `$__psysh__` variable.
+ */
+class LeavePsyshAlonePass extends CodeCleanerPass
+{
+    /**
+     * Validate that the user input does not reference the `$__psysh__` variable.
+     *
+     * @throws RuntimeException if the user is messing with $__psysh__
+     *
+     * @param Node $node
+     */
+    public function enterNode(Node $node)
+    {
+        if ($node instanceof Variable && $node->name === '__psysh__') {
+            throw new RuntimeException('Don\'t mess with $__psysh__. Bad things will happen.');
+        }
+    }
+}