Downgrade PHP7.1 features: nullable types and void return type (#4192)

composer.json

@@ -149,6 +149,7 @@
             "Rector\\NetteKdyby\\": "rules/nette-kdyby/src",
             "Rector\\NetteUtilsCodeQuality\\": "rules/nette-utils-code-quality/src",
             "Rector\\NetteCodeQuality\\": "rules/nette-code-quality/src",
+            "Rector\\DowngradePhp71\\": "rules/downgrade-php71/src",
             "Rector\\DowngradePhp72\\": "rules/downgrade-php72/src",
             "Rector\\DowngradePhp74\\": "rules/downgrade-php74/src",
             "Rector\\DowngradePhp80\\": "rules/downgrade-php80/src",
@@ -234,6 +235,7 @@
             "Rector\\NetteKdyby\\Tests\\": "rules/nette-kdyby/tests",
             "Rector\\NetteUtilsCodeQuality\\Tests\\": "rules/nette-utils-code-quality/tests",
             "Rector\\NetteCodeQuality\\Tests\\": "rules/nette-code-quality/tests",
+            "Rector\\DowngradePhp71\\Tests\\": "rules/downgrade-php71/tests",
             "Rector\\DowngradePhp72\\Tests\\": "rules/downgrade-php72/tests",
             "Rector\\DowngradePhp74\\Tests\\": "rules/downgrade-php74/tests",
             "Rector\\DowngradePhp80\\Tests\\": "rules/downgrade-php80/tests",

config/set/downgrade-php71.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\DowngradePhp71\Rector\FunctionLike\DowngradeNullableTypeParamDeclarationRector;
+use Rector\DowngradePhp71\Rector\FunctionLike\DowngradeNullableTypeReturnDeclarationRector;
+use Rector\DowngradePhp71\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+return static function (ContainerConfigurator $containerConfigurator): void {
+    $services = $containerConfigurator->services();
+    $services->set(DowngradeNullableTypeParamDeclarationRector::class);
+    $services->set(DowngradeNullableTypeReturnDeclarationRector::class);
+    $services->set(DowngradeVoidTypeReturnDeclarationRector::class);
+};

packages/set/src/ValueObject/SetList.php

@@ -171,6 +171,11 @@ final class SetList
      */
     public const DOCTRINE_SERVICES = __DIR__ . '/../../../../config/set/doctrine-services.php';
 
+    /**
+     * @var string
+     */
+    public const DOWNGRADE_PHP71 = __DIR__ . '/../../../../config/set/downgrade-php71.php';
+
     /**
      * @var string
      */

rules/downgrade-php71/src/Contract/Rector/DowngradeParamDeclarationRectorInterface.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Rector\DowngradePhp72\Contract\Rector;
+namespace Rector\DowngradePhp71\Contract\Rector;
 
 use PhpParser\Node\Param;
 

rules/downgrade-php71/src/Contract/Rector/DowngradeReturnDeclarationRectorInterface.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Rector\DowngradePhp72\Contract\Rector;
+namespace Rector\DowngradePhp71\Contract\Rector;
 
 use PhpParser\Node\FunctionLike;
 

rules/downgrade-php71/src/Rector/FunctionLike/AbstractDowngradeParamDeclarationRector.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Rector\DowngradePhp72\Rector\FunctionLike;
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
 
 use PhpParser\Node;
 use PhpParser\Node\FunctionLike;
@@ -10,7 +10,7 @@ use PhpParser\Node\Param;
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Function_;
 use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfo;
-use Rector\DowngradePhp72\Contract\Rector\DowngradeParamDeclarationRectorInterface;
+use Rector\DowngradePhp71\Contract\Rector\DowngradeParamDeclarationRectorInterface;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 
 abstract class AbstractDowngradeParamDeclarationRector extends AbstractDowngradeRector implements DowngradeParamDeclarationRectorInterface

rules/downgrade-php71/src/Rector/FunctionLike/AbstractDowngradeRector.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Rector\DowngradePhp72\Rector\FunctionLike;
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
 
 abstract class AbstractDowngradeRector extends AbstractMaybeAddDocBlockRector
 {

rules/downgrade-php71/src/Rector/FunctionLike/AbstractDowngradeReturnDeclarationRector.php

@@ -2,13 +2,13 @@
 
 declare(strict_types=1);
 
-namespace Rector\DowngradePhp72\Rector\FunctionLike;
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
 
 use PhpParser\Node;
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Function_;
 use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfo;
-use Rector\DowngradePhp72\Contract\Rector\DowngradeReturnDeclarationRectorInterface;
+use Rector\DowngradePhp71\Contract\Rector\DowngradeReturnDeclarationRectorInterface;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 
 abstract class AbstractDowngradeReturnDeclarationRector extends AbstractDowngradeRector implements DowngradeReturnDeclarationRectorInterface

rules/downgrade-php71/src/Rector/FunctionLike/AbstractMaybeAddDocBlockRector.php

@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Rector\DowngradePhp72\Rector\FunctionLike;
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
 
 use Rector\Core\Contract\Rector\ConfigurableRectorInterface;
 use Rector\Core\Rector\AbstractRector;

rules/downgrade-php71/src/Rector/FunctionLike/DowngradeNullableTypeParamDeclarationRector.php

@@ -0,0 +1,71 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
+
+use PhpParser\Node\NullableType;
+use PhpParser\Node\Param;
+use Rector\Core\RectorDefinition\ConfiguredCodeSample;
+use Rector\Core\RectorDefinition\RectorDefinition;
+
+/**
+ * @see \Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeParamDeclarationRector\DowngradeNullableTypeParamDeclarationRectorTest
+ */
+final class DowngradeNullableTypeParamDeclarationRector extends AbstractDowngradeParamDeclarationRector
+{
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition(
+            'Remove the nullable type params, add @param tags instead',
+            [
+                new ConfiguredCodeSample(
+                    <<<'PHP'
+<?php
+
+class SomeClass
+{
+    public function run(?string $input)
+    {
+        // do something
+    }
+}
+PHP
+                    ,
+                    <<<'PHP'
+<?php
+
+class SomeClass
+{
+    /**
+     * @param string|null $input
+     */
+    public function run($input)
+    {
+        // do something
+    }
+}
+PHP
+,
+                    [
+                        self::ADD_DOC_BLOCK => true,
+                    ]
+                ),
+            ]
+        );
+    }
+
+    public function shouldRemoveParamDeclaration(Param $param): bool
+    {
+        if ($param->variadic) {
+            return false;
+        }
+
+        if ($param->type === null) {
+            return false;
+        }
+
+        // Check it is the union type
+        return $param->type instanceof NullableType;
+    }
+}

rules/downgrade-php71/src/Rector/FunctionLike/DowngradeNullableTypeReturnDeclarationRector.php

@@ -0,0 +1,78 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
+
+use PhpParser\Node\FunctionLike;
+use PhpParser\Node\NullableType;
+use PhpParser\Node\Stmt\ClassMethod;
+use PhpParser\Node\Stmt\Function_;
+use Rector\Core\RectorDefinition\ConfiguredCodeSample;
+use Rector\Core\RectorDefinition\RectorDefinition;
+
+/**
+ * @see \Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeReturnDeclarationRector\DowngradeNullableTypeReturnDeclarationRectorTest
+ */
+final class DowngradeNullableTypeReturnDeclarationRector extends AbstractDowngradeReturnDeclarationRector
+{
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition(
+            'Remove returning nullable types, add a @return tag instead',
+            [
+                new ConfiguredCodeSample(
+                    <<<'PHP'
+<?php
+
+class SomeClass
+{
+    public function getResponseOrNothing(bool $flag): ?string
+    {
+        if ($flag) {
+            return 'Hello world';
+        }
+        return null;
+    }
+}
+PHP
+                    ,
+                    <<<'PHP'
+<?php
+
+class SomeClass
+{
+    /**
+     * @return string|null
+     */
+    public function getResponseOrNothing(bool $flag)
+    {
+        if ($flag) {
+            return 'Hello world';
+        }
+        return null;
+    }
+}
+PHP
+,
+                    [
+                        self::ADD_DOC_BLOCK => true,
+                    ]
+                ),
+            ]
+        );
+    }
+
+    /**
+     * @param ClassMethod|Function_ $functionLike
+     */
+    public function shouldRemoveReturnDeclaration(FunctionLike $functionLike): bool
+    {
+        if ($functionLike->returnType === null) {
+            return false;
+        }
+
+        // Check it is the union type
+        return $functionLike->returnType instanceof NullableType;
+    }
+}

rules/downgrade-php71/src/Rector/FunctionLike/DowngradeVoidTypeReturnDeclarationRector.php

@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp71\Rector\FunctionLike;
+
+use Rector\Core\RectorDefinition\ConfiguredCodeSample;
+use Rector\Core\RectorDefinition\RectorDefinition;
+use Rector\DowngradePhp72\Rector\FunctionLike\AbstractDowngradeReturnTypeDeclarationRector;
+
+/**
+ * @see \Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\DowngradeVoidTypeReturnDeclarationRectorTest
+ */
+final class DowngradeVoidTypeReturnDeclarationRector extends AbstractDowngradeReturnTypeDeclarationRector
+{
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition(
+            $this->getRectorDefinitionDescription(),
+            [
+                new ConfiguredCodeSample(
+                    <<<'PHP'
+<?php
+
+class SomeClass
+{
+    public function run(): void
+    {
+        // do something
+    }
+}
+PHP
+                    ,
+                    <<<'PHP'
+<?php
+
+class SomeClass
+{
+    /**
+     * @return void
+     */
+    public function run()
+    {
+        // do something
+    }
+}
+PHP
+,
+                    [
+                        self::ADD_DOC_BLOCK => true,
+                    ]
+                ),
+            ]
+        );
+    }
+
+    public function getTypeNameToRemove(): string
+    {
+        return 'void';
+    }
+}

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeNullableTypeParamDeclarationRector/DowngradeNullableTypeParamDeclarationRectorTest.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeParamDeclarationRector;
+
+use Iterator;
+use Rector\Core\Testing\PHPUnit\AbstractRectorTestCase;
+use Rector\Core\ValueObject\PhpVersionFeature;
+use Rector\DowngradePhp71\Rector\FunctionLike\DowngradeNullableTypeParamDeclarationRector;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class DowngradeNullableTypeParamDeclarationRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    protected function getRectorClass(): string
+    {
+        return DowngradeNullableTypeParamDeclarationRector::class;
+    }
+
+    protected function getPhpVersion(): string
+    {
+        return PhpVersionFeature::BEFORE_NULLABLE_TYPE;
+    }
+}

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeNullableTypeParamDeclarationRector/Fixture/fixture.php.inc

@@ -0,0 +1,28 @@
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeParamDeclarationRector\Fixture;
+
+class FunctionParam
+{
+    public function run(?string $value)
+    {
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeParamDeclarationRector\Fixture;
+
+class FunctionParam
+{
+    /**
+     * @param string|null $value
+     */
+    public function run($value)
+    {
+    }
+}
+
+?>

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeNullableTypeReturnDeclarationRector/DowngradeNullableTypeReturnDeclarationRectorTest.php

@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeReturnDeclarationRector;
+
+use Iterator;
+use Rector\Core\Testing\PHPUnit\AbstractRectorTestCase;
+use Rector\Core\ValueObject\PhpVersionFeature;
+use Rector\DowngradePhp71\Rector\FunctionLike\DowngradeNullableTypeReturnDeclarationRector;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class DowngradeNullableTypeReturnDeclarationRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    protected function getRectorClass(): string
+    {
+        return DowngradeNullableTypeReturnDeclarationRector::class;
+    }
+
+    protected function getPhpVersion(): string
+    {
+        return PhpVersionFeature::BEFORE_NULLABLE_TYPE;
+    }
+}

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeNullableTypeReturnDeclarationRector/Fixture/fixture.php.inc

@@ -0,0 +1,38 @@
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeReturnDeclarationRector\Fixture;
+
+class ClassMethod
+{
+    public function run(): ?string
+    {
+        if (mt_rand()) {
+            return null;
+        }
+
+        return 'value';
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeNullableTypeReturnDeclarationRector\Fixture;
+
+class ClassMethod
+{
+    /**
+     * @return string|null
+     */
+    public function run()
+    {
+        if (mt_rand()) {
+            return null;
+        }
+
+        return 'value';
+    }
+}
+
+?>

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeVoidTypeReturnDeclarationRector/DowngradeVoidTypeReturnDeclarationRectorTest.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector;
+
+use Iterator;
+use Rector\Core\Testing\PHPUnit\AbstractRectorTestCase;
+use Rector\Core\ValueObject\PhpVersionFeature;
+use Rector\DowngradePhp71\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector;
+use Symplify\SmartFileSystem\SmartFileInfo;
+
+final class DowngradeVoidTypeReturnDeclarationRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideData()
+     */
+    public function test(SmartFileInfo $fileInfo): void
+    {
+        $this->doTestFileInfo($fileInfo);
+    }
+
+    public function provideData(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    /**
+     * @return array<string, mixed[]>
+     */
+    protected function getRectorsWithConfiguration(): array
+    {
+        return [
+            DowngradeVoidTypeReturnDeclarationRector::class => [
+                DowngradeVoidTypeReturnDeclarationRector::ADD_DOC_BLOCK => true,
+            ],
+        ];
+    }
+
+    protected function getRectorClass(): string
+    {
+        return DowngradeVoidTypeReturnDeclarationRector::class;
+    }
+
+    protected function getPhpVersion(): string
+    {
+        return PhpVersionFeature::BEFORE_VOID_RETURN_TYPE;
+    }
+}

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeVoidTypeReturnDeclarationRector/Fixture/docblock_exists.php.inc

@@ -0,0 +1,32 @@
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\Fixture;
+
+class DocBlockExists {
+    /**
+     * This property is the best one
+     */
+    public function run(): void
+    {
+        // do something
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\Fixture;
+
+class DocBlockExists {
+    /**
+     * This property is the best one
+     * @return void
+     */
+    public function run()
+    {
+        // do something
+    }
+}
+
+?>

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeVoidTypeReturnDeclarationRector/Fixture/docblock_tag_exists.php.inc

@@ -0,0 +1,33 @@
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\Fixture;
+
+class DocBlockTagExists {
+    /**
+     * This property is the best one
+     * @return void
+     */
+    public function run(): void
+    {
+        // do something
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\Fixture;
+
+class DocBlockTagExists {
+    /**
+     * This property is the best one
+     * @return void
+     */
+    public function run()
+    {
+        // do something
+    }
+}
+
+?>

rules/downgrade-php71/tests/Rector/FunctionLike/DowngradeVoidTypeReturnDeclarationRector/Fixture/fixture.php.inc

@@ -0,0 +1,30 @@
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\Fixture;
+
+class SomeClass
+{
+    public function run(): void
+    {
+        // do something
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\DowngradePhp71\Tests\Rector\FunctionLike\DowngradeVoidTypeReturnDeclarationRector\Fixture;
+
+class SomeClass
+{
+    /**
+     * @return void
+     */
+    public function run()
+    {
+        // do something
+    }
+}
+
+?>

rules/downgrade-php72/src/Rector/FunctionLike/AbstractDowngradeParamTypeDeclarationRector.php

@@ -7,6 +7,7 @@ namespace Rector\DowngradePhp72\Rector\FunctionLike;
 use PhpParser\Node\Identifier;
 use PhpParser\Node\NullableType;
 use PhpParser\Node\Param;
+use Rector\DowngradePhp71\Rector\FunctionLike\AbstractDowngradeParamDeclarationRector;
 use Rector\DowngradePhp72\Contract\Rector\DowngradeTypeRectorInterface;
 
 abstract class AbstractDowngradeParamTypeDeclarationRector extends AbstractDowngradeParamDeclarationRector implements DowngradeTypeRectorInterface

rules/downgrade-php72/src/Rector/FunctionLike/AbstractDowngradeReturnTypeDeclarationRector.php

@@ -8,6 +8,7 @@ use PhpParser\Node\FunctionLike;
 use PhpParser\Node\NullableType;
 use PhpParser\Node\Stmt\ClassMethod;
 use PhpParser\Node\Stmt\Function_;
+use Rector\DowngradePhp71\Rector\FunctionLike\AbstractDowngradeReturnDeclarationRector;
 use Rector\DowngradePhp72\Contract\Rector\DowngradeTypeRectorInterface;
 
 abstract class AbstractDowngradeReturnTypeDeclarationRector extends AbstractDowngradeReturnDeclarationRector implements DowngradeTypeRectorInterface

rules/downgrade-php74/src/Rector/Property/AbstractDowngradeTypedPropertyRector.php

@@ -7,7 +7,7 @@ namespace Rector\DowngradePhp74\Rector\Property;
 use PhpParser\Node;
 use PhpParser\Node\Stmt\Property;
 use Rector\BetterPhpDocParser\PhpDocInfo\PhpDocInfo;
-use Rector\DowngradePhp72\Rector\FunctionLike\AbstractDowngradeRector;
+use Rector\DowngradePhp71\Rector\FunctionLike\AbstractDowngradeRector;
 use Rector\DowngradePhp74\Contract\Rector\DowngradeTypedPropertyRectorInterface;
 use Rector\NodeTypeResolver\Node\AttributeKey;
 

rules/downgrade-php80/src/Rector/FunctionLike/DowngradeUnionTypeParamDeclarationRector.php

@@ -8,7 +8,7 @@ use PhpParser\Node\Param;
 use PhpParser\Node\UnionType;
 use Rector\Core\RectorDefinition\ConfiguredCodeSample;
 use Rector\Core\RectorDefinition\RectorDefinition;
-use Rector\DowngradePhp72\Rector\FunctionLike\AbstractDowngradeParamDeclarationRector;
+use Rector\DowngradePhp71\Rector\FunctionLike\AbstractDowngradeParamDeclarationRector;
 
 /**
  * @see \Rector\DowngradePhp80\Tests\Rector\FunctionLike\DowngradeUnionTypeParamDeclarationRector\DowngradeUnionTypeParamDeclarationRectorTest

rules/downgrade-php80/src/Rector/FunctionLike/DowngradeUnionTypeReturnDeclarationRector.php

@@ -10,7 +10,7 @@ use PhpParser\Node\Stmt\Function_;
 use PhpParser\Node\UnionType;
 use Rector\Core\RectorDefinition\ConfiguredCodeSample;
 use Rector\Core\RectorDefinition\RectorDefinition;
-use Rector\DowngradePhp72\Rector\FunctionLike\AbstractDowngradeReturnDeclarationRector;
+use Rector\DowngradePhp71\Rector\FunctionLike\AbstractDowngradeReturnDeclarationRector;
 
 /**
  * @see \Rector\DowngradePhp80\Tests\Rector\FunctionLike\DowngradeUnionTypeReturnDeclarationRector\DowngradeUnionTypeReturnDeclarationRectorTest

src/ValueObject/PhpVersionFeature.php

@@ -161,6 +161,16 @@ final class PhpVersionFeature
      */
     public const BEFORE_OBJECT_TYPE = '7.1';
 
+    /**
+     * @var string
+     */
+    public const BEFORE_VOID_RETURN_TYPE = '7.0';
+
+    /**
+     * @var string
+     */
+    public const BEFORE_NULLABLE_TYPE = '7.0';
+
     /**
      * @see https://wiki.php.net/rfc/covariant-returns-and-contravariant-parameters
      * @var string