Add errorClasses parameter to HandleErrors so that HandleErrors middleware can be used on only some exceptions if wanted

src/Http/Middleware/HandleErrors.php

@@ -41,11 +41,17 @@ class HandleErrors implements Middleware
      */
     protected $reporters;
 
-    public function __construct(Registry $registry, HttpFormatter $formatter, iterable $reporters)
+    /**
+     * @var array
+     */
+    protected $errorClasses;
+
+    public function __construct(Registry $registry, HttpFormatter $formatter, iterable $reporters, $errorClasses = null)
     {
         $this->registry = $registry;
         $this->formatter = $formatter;
         $this->reporters = $reporters;
+        $this->errorClasses = $errorClasses;
     }
 
     /**
@@ -56,6 +62,25 @@ class HandleErrors implements Middleware
         try {
             return $handler->handle($request);
         } catch (Throwable $e) {
+            // If an array of allowlisted exception classes has been provided
+            // (such as when we only want to handle frontend errors), we check
+            // that the error inherits one of these classes. If not, we throw it
+            // to let other handlers up in the middleware pipe handle it.
+            if (is_array($this->errorClasses)) {
+                $handled = false;
+
+                foreach ($this->errorClasses as $errorClass) {
+                    if ($e instanceof $errorClass) {
+                        $handled = true;
+                        break;
+                    }
+                }
+
+                if (!$handled) {
+                    throw $e;
+                }
+
+            }
             $error = $this->registry->handle($e);
 
             if ($error->shouldBeReported()) {