[PHP] Add ReservedObjectRector

config/level/php/php71.yml

@@ -1,2 +1,5 @@
 services:
     Rector\Php\Rector\BinaryOp\IsIterableRector: ~
+    Rector\Php\Rector\Name\ReservedObjectRector:
+        $reservedKeywordsToReplacements:
+            Object: 'BaseObject'

packages/Php/src/Rector/Name/ReservedObjectRector.php

@@ -0,0 +1,110 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Php\Rector\Name;
+
+use PhpParser\Node;
+use PhpParser\Node\Identifier;
+use PhpParser\Node\Name;
+use PhpParser\Node\Stmt\Namespace_;
+use Rector\NodeTypeResolver\Node\Attribute;
+use Rector\Rector\AbstractRector;
+use Rector\RectorDefinition\CodeSample;
+use Rector\RectorDefinition\RectorDefinition;
+
+/**
+ * @see https://wiki.php.net/rfc/object-typehint
+ *
+ * @see https://github.com/cebe/yii2/commit/9548a212ecf6e50fcdb0e5ba6daad88019cfc544
+ */
+final class ReservedObjectRector extends AbstractRector
+{
+    /**
+     * @var string[]
+     */
+    private $reservedKeywordsToReplacements = [];
+
+    /**
+     * @param string[] $reservedKeywordsToReplacements
+     */
+    public function __construct(array $reservedKeywordsToReplacements)
+    {
+        $this->reservedKeywordsToReplacements = $reservedKeywordsToReplacements;
+    }
+
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition(
+            'Changes reserved "Object" name to "<Smart>Object" where <Smart> can be configured',
+            [
+                new CodeSample(
+                    <<<'CODE_SAMPLE'
+class Object
+{
+}
+CODE_SAMPLE
+                    ,
+                    <<<'CODE_SAMPLE'
+class SmartObject
+{
+}
+CODE_SAMPLE
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getNodeTypes(): array
+    {
+        return [Identifier::class, Name::class];
+    }
+
+    /**
+     * @param Identifier|Name $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if ($node instanceof Identifier) {
+            return $this->processIdentifier($node);
+        }
+
+        if ($node instanceof Name) {
+            return $this->processName($node);
+        }
+
+        return $node;
+    }
+
+    private function processIdentifier(Identifier $identifierNode): Identifier
+    {
+        foreach ($this->reservedKeywordsToReplacements as $reservedKeyword => $replacement) {
+            if (strtolower($identifierNode->name) === strtolower($reservedKeyword)) {
+                $identifierNode->name = $replacement;
+            }
+        }
+
+        return $identifierNode;
+    }
+
+    private function processName(Name $nameNode): Name
+    {
+        // we look for "extends <Name>"
+        $parentNode = $nameNode->getAttribute(Attribute::PARENT_NODE);
+        // "Object" can part of namespace name
+        if ($parentNode instanceof Namespace_) {
+            return $nameNode;
+        }
+
+        // process lass part
+        foreach ($this->reservedKeywordsToReplacements as $reservedKeyword => $replacement) {
+            if (strtolower($nameNode->getLast()) === strtolower($reservedKeyword)) {
+                $nameNode->parts[count($nameNode->parts) - 1] = $replacement;
+                $nameNode->setAttribute(Attribute::ORIGINAL_NODE, null);
+            }
+        }
+
+        return $nameNode;
+    }
+}

packages/Php/tests/Rector/Name/ReservedObjectRector/Correct/correct.php.inc

@@ -0,0 +1,28 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong;
+
+class SmartObject
+{
+
+}
+
+class ChildObject extends \Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject
+{
+
+}
+
+$some = new ChildObject();
+if ($some instanceof \Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject) {
+    return;
+}
+
+is_subclass_of($some, \Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject::class);
+
+is_a($some, \Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject::class);
+
+function someFunction(\Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject $reservedObject): \Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject {
+    return $reservedObject;
+}
+
+$someObject = new \Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong\SmartObject;

packages/Php/tests/Rector/Name/ReservedObjectRector/ReservedObjectRectorTest.php

@@ -0,0 +1,31 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Php\Tests\Rector\Name\ReservedObjectRector;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+/**
+ * @covers \Rector\Php\Rector\Name\ReservedObjectRector
+ */
+final class ReservedObjectRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideWrongToFixedFiles()
+     */
+    public function test(string $wrong, string $fixed): void
+    {
+        $this->doTestFileMatchesExpectedContent($wrong, $fixed);
+    }
+
+    public function provideWrongToFixedFiles(): Iterator
+    {
+        // it needs to have different name, since in PHP 7.1 it already reserved
+        yield [__DIR__ . '/Wrong/ReservedObject.php', __DIR__ . '/Correct/correct.php.inc'];
+    }
+
+    protected function provideConfig(): string
+    {
+        return __DIR__ . '/config.yml';
+    }
+}

packages/Php/tests/Rector/Name/ReservedObjectRector/Wrong/ReservedObject.php

@@ -0,0 +1,28 @@
+<?php declare(strict_types=1);
+
+namespace Rector\Php\Tests\Rector\Name\ReservedObjectRector\Wrong;
+
+class ReservedObject
+{
+
+}
+
+class ChildObject extends ReservedObject
+{
+
+}
+
+$some = new ChildObject();
+if ($some instanceof ReservedObject) {
+    return;
+}
+
+is_subclass_of($some, ReservedObject::class);
+
+is_a($some, ReservedObject::class);
+
+function someFunction(ReservedObject $reservedObject): ReservedObject {
+    return $reservedObject;
+}
+
+$someObject = new ReservedObject;

packages/Php/tests/Rector/Name/ReservedObjectRector/config.yml

@@ -0,0 +1,5 @@
+services:
+    Rector\Php\Rector\Name\ReservedObjectRector:
+        # todo make work even without these explicit variables
+        $reservedKeywordsToReplacements:
+            'ReservedObject': 'SmartObject'