[Validator] Deprecate Constraint::$errorNames in favor of Constraint::ERROR_NAMES

Author: nicolas-grekas

Extension/Validator/Constraints/Form.php

@@ -21,11 +21,16 @@ class Form extends Constraint
     public const NOT_SYNCHRONIZED_ERROR = '1dafa156-89e1-4736-b832-419c2e501fca';
     public const NO_SUCH_FIELD_ERROR = '6e5212ed-a197-4339-99aa-5654798a4854';
 
-    protected static $errorNames = [
+    protected const ERROR_NAMES = [
         self::NOT_SYNCHRONIZED_ERROR => 'NOT_SYNCHRONIZED_ERROR',
         self::NO_SUCH_FIELD_ERROR => 'NO_SUCH_FIELD_ERROR',
     ];
 
+    /**
+     * @deprecated since Symfony 6.1, use const ERROR_NAMES instead
+     */
+    protected static $errorNames = self::ERROR_NAMES;
+
     /**
      * {@inheritdoc}
      */