Primo Committ

vendor/psy/psysh/src/CodeCleaner/InstanceOfPass.php

@@ -0,0 +1,67 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2022 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\Array_;
+use PhpParser\Node\Expr\BinaryOp;
+use PhpParser\Node\Expr\ClassConstFetch;
+use PhpParser\Node\Expr\ConstFetch;
+use PhpParser\Node\Expr\Instanceof_;
+use PhpParser\Node\Scalar;
+use PhpParser\Node\Scalar\Encapsed;
+use Psy\Exception\FatalErrorException;
+
+/**
+ * Validate that the instanceof statement does not receive a scalar value or a non-class constant.
+ *
+ * @author Martin Hasoň <martin.hason@gmail.com>
+ */
+class InstanceOfPass extends CodeCleanerPass
+{
+    const EXCEPTION_MSG = 'instanceof expects an object instance, constant given';
+
+    private $atLeastPhp73;
+
+    public function __construct()
+    {
+        $this->atLeastPhp73 = \version_compare(\PHP_VERSION, '7.3', '>=');
+    }
+
+    /**
+     * Validate that the instanceof statement does not receive a scalar value or a non-class constant.
+     *
+     * @throws FatalErrorException if a scalar or a non-class constant is given
+     *
+     * @param Node $node
+     */
+    public function enterNode(Node $node)
+    {
+        // Basically everything is allowed in PHP 7.3 :)
+        if ($this->atLeastPhp73) {
+            return;
+        }
+
+        if (!$node instanceof Instanceof_) {
+            return;
+        }
+
+        if (($node->expr instanceof Scalar && !$node->expr instanceof Encapsed) ||
+            $node->expr instanceof BinaryOp ||
+            $node->expr instanceof Array_ ||
+            $node->expr instanceof ConstFetch ||
+            $node->expr instanceof ClassConstFetch
+        ) {
+            throw new FatalErrorException(self::EXCEPTION_MSG, 0, \E_ERROR, null, $node->getLine());
+        }
+    }
+}