Allow the Batch and Chain onQueue method to accept Backed Enums (#53359)

Author: onlime

src/Illuminate/Bus/PendingBatch.php

@@ -12,6 +12,8 @@
 use Laravel\SerializableClosure\SerializableClosure;
 use Throwable;
 
+use function Illuminate\Support\enum_value;
+
 class PendingBatch
 {
     use Conditionable;
@@ -261,12 +263,12 @@ public function connection()
     /**
      * Specify the queue that the batched jobs should run on.
      *
-     * @param  string  $queue
+     * @param  \BackedEnum|string|null  $queue
      * @return $this
      */
-    public function onQueue(string $queue)
+    public function onQueue($queue)
     {
-        $this->options['queue'] = $queue;
+        $this->options['queue'] = enum_value($queue);
 
         return $this;
     }

src/Illuminate/Events/QueuedClosure.php

@@ -5,6 +5,8 @@
 use Closure;
 use Laravel\SerializableClosure\SerializableClosure;
 
+use function Illuminate\Support\enum_value;
+
 class QueuedClosure
 {
     /**
@@ -69,12 +71,12 @@ public function onConnection($connection)
     /**
      * Set the desired queue for the job.
      *
-     * @param  string|null  $queue
+     * @param  \BackedEnum|string|null  $queue
      * @return $this
      */
     public function onQueue($queue)
     {
-        $this->queue = $queue;
+        $this->queue = enum_value($queue);
 
         return $this;
     }

src/Illuminate/Foundation/Bus/PendingChain.php

@@ -8,6 +8,8 @@
 use Illuminate\Support\Traits\Conditionable;
 use Laravel\SerializableClosure\SerializableClosure;
 
+use function Illuminate\Support\enum_value;
+
 class PendingChain
 {
     use Conditionable;
@@ -83,12 +85,12 @@ public function onConnection($connection)
     /**
      * Set the desired queue for the job.
      *
-     * @param  string|null  $queue
+     * @param  \BackedEnum|string|null  $queue
      * @return $this
      */
     public function onQueue($queue)
     {
-        $this->queue = $queue;
+        $this->queue = enum_value($queue);
 
         return $this;
     }

src/Illuminate/Mail/Mailer.php

@@ -465,7 +465,7 @@ protected function setGlobalToAndRemoveCcAndBcc($message)
      * Queue a new mail message for sending.
      *
      * @param  \Illuminate\Contracts\Mail\Mailable|string|array  $view
-     * @param  string|null  $queue
+     * @param  \BackedEnum|string|null  $queue
      * @return mixed
      *
      * @throws \InvalidArgumentException
@@ -486,7 +486,7 @@ public function queue($view, $queue = null)
     /**
      * Queue a new mail message for sending on the given queue.
      *
-     * @param  string  $queue
+     * @param  \BackedEnum|string|null  $queue
      * @param  \Illuminate\Contracts\Mail\Mailable  $view
      * @return mixed
      */