generics.deprecatedEnumDefault

This error is reported by phpstan/phpstan-deprecation-rules.

Code example

<?php declare(strict_types = 1);

/**
 * @deprecated Use NewStatus instead.
 */
enum OldStatus
{
    case Active;
}

/**
 * @template T = OldStatus
 */
class Container
{
}

Why is it reported?

A @template tag uses a deprecated enum as its default type. Since the enum is deprecated, code relying on this default will break when the enum is removed.

How to fix it

Replace the deprecated enum with its recommended replacement:

 <?php declare(strict_types = 1);

 /**
- * @template T = OldStatus
+ * @template T = NewStatus
  */
 class Container
 {
 }