From 4b0f2997a5ac0aac67beaa47e2bbd9210e70bb5d Mon Sep 17 00:00:00 2001
From: Alexandre Daubois <alex.daubois@gmail.com>
Date: Fri, 30 Apr 2021 17:29:27 +0200
Subject: [PATCH] [VarExporter] Add support of PHP enumerations

---
 src/Symfony/Component/VarExporter/Internal/Exporter.php   | 4 ++--
 .../Component/VarExporter/Tests/Fixtures/FooUnitEnum.php  | 8 ++++++++
 .../Component/VarExporter/Tests/Fixtures/unit-enum.php    | 5 +++++
 .../Component/VarExporter/Tests/VarExporterTest.php       | 5 +++++
 src/Symfony/Component/VarExporter/VarExporter.php         | 2 +-
 5 files changed, 21 insertions(+), 3 deletions(-)
 create mode 100644 src/Symfony/Component/VarExporter/Tests/Fixtures/FooUnitEnum.php
 create mode 100644 src/Symfony/Component/VarExporter/Tests/Fixtures/unit-enum.php

diff --git a/src/Symfony/Component/VarExporter/Internal/Exporter.php b/src/Symfony/Component/VarExporter/Internal/Exporter.php
index 74b81d5cf6948..d15126a155e4e 100644
--- a/src/Symfony/Component/VarExporter/Internal/Exporter.php
+++ b/src/Symfony/Component/VarExporter/Internal/Exporter.php
@@ -62,7 +62,7 @@ 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;
             }
 
@@ -190,7 +190,7 @@ public static function prepare($values, $objectsPool, &$refsPool, &$objectsCount
     public static function export($value, $indent = '')
     {
         switch (true) {
-            case \is_int($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';
diff --git a/src/Symfony/Component/VarExporter/Tests/Fixtures/FooUnitEnum.php b/src/Symfony/Component/VarExporter/Tests/Fixtures/FooUnitEnum.php
new file mode 100644
index 0000000000000..0f569de8328b2
--- /dev/null
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/FooUnitEnum.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace Symfony\Component\VarExporter\Tests\Fixtures;
+
+enum FooUnitEnum
+{
+    case Bar;
+}
diff --git a/src/Symfony/Component/VarExporter/Tests/Fixtures/unit-enum.php b/src/Symfony/Component/VarExporter/Tests/Fixtures/unit-enum.php
new file mode 100644
index 0000000000000..48ab51dd0141b
--- /dev/null
+++ b/src/Symfony/Component/VarExporter/Tests/Fixtures/unit-enum.php
@@ -0,0 +1,5 @@
+<?php
+
+return [
+    Symfony\Component\VarExporter\Tests\Fixtures\FooUnitEnum::Bar,
+];
diff --git a/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php b/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
index 305abd1b77293..bd21448d1a3e8 100644
--- a/src/Symfony/Component/VarExporter/Tests/VarExporterTest.php
+++ b/src/Symfony/Component/VarExporter/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];
+        }
     }
 }
 
diff --git a/src/Symfony/Component/VarExporter/VarExporter.php b/src/Symfony/Component/VarExporter/VarExporter.php
index f1260d152dd87..a5cacb087572f 100644
--- a/src/Symfony/Component/VarExporter/VarExporter.php
+++ b/src/Symfony/Component/VarExporter/VarExporter.php
@@ -43,7 +43,7 @@ public static function export($value, bool &$isStaticValue = null): string
     {
         $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);
         }
 

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