[Downgrade PHP 7.0] Move Throwable out of type hints

It is only available on PHP 7.0+:
https://www.php.net/manual/en/class.throwable.php

config/set/downgrade-php70.php

@@ -12,6 +12,7 @@
 use Rector\DowngradePhp70\Rector\FuncCall\DowngradeDirnameLevelsRector;
 use Rector\DowngradePhp70\Rector\FuncCall\DowngradeSessionStartArrayOptionsRector;
 use Rector\DowngradePhp70\Rector\FunctionLike\DowngradeScalarTypeDeclarationRector;
+use Rector\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector;
 use Rector\DowngradePhp70\Rector\GroupUse\SplitGroupedUseImportsRector;
 use Rector\DowngradePhp70\Rector\MethodCall\DowngradeClosureCallRector;
 use Rector\DowngradePhp70\Rector\MethodCall\DowngradeMethodCallOnCloneRector;
@@ -26,6 +27,7 @@
 
     $services = $containerConfigurator->services();
     $services->set(DowngradeScalarTypeDeclarationRector::class);
+    $services->set(DowngradeThrowableTypeDeclarationRector::class);
     $services->set(DowngradeStrictTypeDeclarationRector::class);
     $services->set(DowngradeSelfTypeDeclarationRector::class);
     $services->set(DowngradeAnonymousClassRector::class);

packages/BetterPhpDocParser/PhpDocParser/PhpDocFromTypeDeclarationDecorator.php

@@ -182,6 +182,9 @@ private function isTypeMatch(ComplexType|Identifier|Name $typeNode, Type $requir
         if ($returnType instanceof UnionType) {
             $returnType = $this->typeUnwrapper->unwrapNullableType($returnType);
         }
+        if ($returnType instanceof ObjectType) {
+            return $returnType->equals($requireType);
+        }
 
         return $returnType::class === $requireType::class;
     }

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/DowngradeThrowableTypeDeclarationRectorTest.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector;
+
+use Iterator;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class DowngradeThrowableTypeDeclarationRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @requires PHP 8.0
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    /**
+     * @return Iterator<SmartFileInfo>
+     */
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    public function provideConfigFilePath(): string
+    {
+        return __DIR__ . '/config/configured_rule.php';
+    }
+}

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/arrow_function_param_throwable.php.inc

@@ -0,0 +1,27 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class ArrowFunctionParamThrowable
+{
+    public function run()
+    {
+        $value = fn (\Throwable $param): bool => true;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class ArrowFunctionParamThrowable
+{
+    public function run()
+    {
+        $value = fn ($param): bool => true;
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/arrow_function_return_throwable.php.inc

@@ -0,0 +1,27 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+final class ArrowFunctionReturnThrowable
+{
+    public function run()
+    {
+        $value = fn () : \Throwable => new \Exception('Yikes!');
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+final class ArrowFunctionReturnThrowable
+{
+    public function run()
+    {
+        $value = fn () => new \Exception('Yikes!');
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/docblock_exists.php.inc

@@ -0,0 +1,30 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class DocblockExists {
+    /**
+     * This property is the best one
+     */
+    public function someFunction(\Throwable $anything)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class DocblockExists {
+    /**
+     * This property is the best one
+     * @param \Throwable $anything
+     */
+    public function someFunction($anything)
+    {
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/docblock_tag_exists.php.inc

@@ -0,0 +1,31 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class DocblockTagExists {
+    /**
+     * This property is the best one
+     * @param \Throwable $anything
+     */
+    public function someFunction(\Throwable $anything)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class DocblockTagExists {
+    /**
+     * This property is the best one
+     * @param \Throwable $anything
+     */
+    public function someFunction($anything)
+    {
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/fixture.php.inc

@@ -0,0 +1,28 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class Fixture
+{
+    public function someFunction(\Throwable $anything)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class Fixture
+{
+    /**
+     * @param \Throwable $anything
+     */
+    public function someFunction($anything)
+    {
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/multiple_matching_params.php.inc

@@ -0,0 +1,29 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class MultipleMatchingParams
+{
+    public function someFunction(\Throwable $anything, string $someOtherVar, \Throwable $someOtherObject)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class MultipleMatchingParams
+{
+    /**
+     * @param \Throwable $anything
+     * @param \Throwable $someOtherObject
+     */
+    public function someFunction($anything, string $someOtherVar, $someOtherObject)
+    {
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/multiple_params.php.inc

@@ -0,0 +1,28 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class MultipleParams
+{
+    public function someFunction(\Throwable $anything, string $someOtherVar)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class MultipleParams
+{
+    /**
+     * @param \Throwable $anything
+     */
+    public function someFunction($anything, string $someOtherVar)
+    {
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/nullable.php.inc

@@ -0,0 +1,29 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class Fixture
+{
+    public function someFunction(?\Throwable $anything): ?\Throwable
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class Fixture
+{
+    /**
+     * @param \Throwable|null $anything
+     * @return \Throwable|null
+     */
+    public function someFunction($anything)
+    {
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/on_closure.php.inc

@@ -0,0 +1,37 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class OnClosure
+{
+    public function run()
+    {
+        $foo = array_filter(
+            $list,
+            function (\Throwable $fieldArgValue) {
+              return is_null($fieldArgValue);
+            }
+          );
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class OnClosure
+{
+    public function run()
+    {
+        $foo = array_filter(
+            $list,
+            function ($fieldArgValue) {
+              return is_null($fieldArgValue);
+            }
+          );
+    }
+}
+
+?>

rules-tests/DowngradePhp70/Rector/FunctionLike/DowngradeThrowableTypeDeclarationRector/Fixture/return_docblock_exists.php.inc

@@ -0,0 +1,32 @@
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class ReturnDocblockExists {
+    /**
+     * This property is the best one
+     */
+    public function getAnything(): \Throwable
+    {
+        return new \Exception('Yikes!');
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\DowngradePhp70\Rector\FunctionLike\DowngradeThrowableTypeDeclarationRector\Fixture;
+
+class ReturnDocblockExists {
+    /**
+     * This property is the best one
+     * @return \Throwable
+     */
+    public function getAnything()
+    {
+        return new \Exception('Yikes!');
+    }
+}
+
+?>