Merge branch '4.4' into 5.2

* 4.4:
  [Config][DependencyInjection] Uniformize trailing slash handling
  [PropertyInfo] Make ReflectionExtractor correctly extract nullability
  [PropertyInfo] fix attribute namespace with recursive traits
  Check redis extension version
  [Security] Update Russian translations
  [VarExporter] Add support of PHP enumerations
  [Security] Added missing Japanese translations
  [Security] Added missing Polish translations
  [Security] Add missing Italian translations #41051
  [Security] Missing translations pt_BR
  getProtocolVersion may return null
  [Translation] Set default locale for IdentityTranslatorTest

Author: nicolas-grekas

Internal/Exporter.php

@@ -60,7 +60,7 @@ public static function prepare($values, $objectsPool, &$refsPool, &$objectsCount
                     $value = self::prepare($value, $objectsPool, $refsPool, $objectsCount, $valueIsStatic);
                 }
                 goto handle_value;
-            } elseif (!\is_object($value) && !$value instanceof \__PHP_Incomplete_Class) {
+            } elseif (!\is_object($value) && !$value instanceof \__PHP_Incomplete_Class || $value instanceof \UnitEnum) {
                 goto handle_value;
             }
 
@@ -188,7 +188,7 @@ public static function prepare($values, $objectsPool, &$refsPool, &$objectsCount
     public static function export($value, string $indent = '')
     {
         switch (true) {
-            case \is_int($value) || \is_float($value): return var_export($value, true);
+            case \is_int($value) || \is_float($value) || $value instanceof \UnitEnum: return var_export($value, true);
             case [] === $value: return '[]';
             case false === $value: return 'false';
             case true === $value: return 'true';

Tests/Fixtures/FooUnitEnum.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace Symfony\Component\VarExporter\Tests\Fixtures;
+
+enum FooUnitEnum
+{
+    case Bar;
+}

Tests/Fixtures/unit-enum.php

@@ -0,0 +1,5 @@
+<?php
+
+return [
+    Symfony\Component\VarExporter\Tests\Fixtures\FooUnitEnum::Bar,
+];

Tests/VarExporterTest.php

@@ -16,6 +16,7 @@
 use Symfony\Component\VarExporter\Exception\ClassNotFoundException;
 use Symfony\Component\VarExporter\Exception\NotInstantiableTypeException;
 use Symfony\Component\VarExporter\Internal\Registry;
+use Symfony\Component\VarExporter\Tests\Fixtures\FooUnitEnum;
 use Symfony\Component\VarExporter\VarExporter;
 
 class VarExporterTest extends TestCase
@@ -209,6 +210,10 @@ public function provideExport()
         yield ['private-constructor', PrivateConstructor::create('bar')];
 
         yield ['php74-serializable', new Php74Serializable()];
+
+        if (\PHP_VERSION_ID >= 80100) {
+            yield ['unit-enum', [FooUnitEnum::Bar], true];
+        }
     }
 }
 

VarExporter.php

@@ -44,7 +44,7 @@ public static function export($value, bool &$isStaticValue = null, array &$found
     {
         $isStaticValue = true;
 
-        if (!\is_object($value) && !(\is_array($value) && $value) && !$value instanceof \__PHP_Incomplete_Class && !\is_resource($value)) {
+        if (!\is_object($value) && !(\is_array($value) && $value) && !$value instanceof \__PHP_Incomplete_Class && !\is_resource($value) || $value instanceof \UnitEnum) {
             return Exporter::export($value);
         }