Issue #3363197: Combined refactoring and attributes interface

src/Attribute/Alter.php

@@ -9,7 +9,7 @@ namespace Drupal\hux\Attribute;
  */
 #[\Attribute(\Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
 // @codingStandardsIgnoreLine
-class Alter {
+class Alter extends HookAttributeBase {
 
   /**
    * Constructs a new Alter.
@@ -18,10 +18,10 @@ class Alter {
    *   The alter name, without the 'hook_' or '_alter' components.
    */
   public function __construct(
-    public string $alter,
+    private readonly string $alter,
   ) {
-    assert(!str_starts_with($alter, 'hook_'));
-    assert(!str_ends_with($alter, '_alter'));
+    assert(!str_starts_with($alter, 'hook_'), "Expected alter name without 'hook_', found $alter.");
+    assert(!str_ends_with($alter, '_alter'), "Expected alter name without '_alter', found $alter.");
     if (in_array($alter, [
       // This hook is invoked by \Drupal\Core\Extension\ModuleHandler::alter.
       'module_implements_alter',
@@ -33,4 +33,11 @@ class Alter {
     }
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getHookNames(): array {
+    return [$this->alter . '_alter'];
+  }
+
 }