--- /dev/null
+<?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\FuncCall as FunctionCall;
+use PhpParser\Node\Expr\MethodCall;
+use PhpParser\Node\Expr\StaticCall;
+use Psy\Exception\FatalErrorException;
+
+/**
+ * Validate that the user did not use the call-time pass-by-reference that causes a fatal error.
+ *
+ * As of PHP 5.4.0, call-time pass-by-reference was removed, so using it will raise a fatal error.
+ *
+ * @author Martin HasoĊ <martin.hason@gmail.com>
+ */
+class CallTimePassByReferencePass extends CodeCleanerPass
+{
+ /**
+ * Validate of use call-time pass-by-reference.
+ *
+ * @throws RuntimeException if the user used call-time pass-by-reference in PHP >= 5.4.0
+ *
+ * @param Node $node
+ */
+ public function enterNode(Node $node)
+ {
+ if (version_compare(PHP_VERSION, '5.4', '<')) {
+ return;
+ }
+
+ if (!$node instanceof FunctionCall && !$node instanceof MethodCall && !$node instanceof StaticCall) {
+ return;
+ }
+
+ foreach ($node->args as $arg) {
+ if ($arg->byRef) {
+ throw new FatalErrorException('Call-time pass-by-reference has been removed');
+ }
+ }
+ }
+}