Skeleton is ready

app/Kernel/Object/Enum.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Object;
+
+use BackedEnum;
+
+class Enum
+{
+    /**
+     * Extract values from an array of BackedEnum instances.
+     *
+     * @param array<int,BackedEnum> $enums
+     *
+     * @return array<int,int|string|float>
+     */
+    public static function values(array $enums): array
+    {
+        return array_map(fn (BackedEnum $enum) => static::value($enum), $enums);
+    }
+
+    public static function value(BackedEnum $enum): int|string|float
+    {
+        return $enum->value;
+    }
+}