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Error Identifier: enum.generic

Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.

Code example #

<?php declare(strict_types = 1);

/**
 * @template T
 */
enum Status
{
    case Active;
    case Inactive;
}

Why is it reported? #

PHP enums cannot be generic. Unlike classes and interfaces, enums do not support @template type parameters because enum cases are singleton values and cannot be parameterized with different types.

How to fix it #

Remove the @template tag from the enum. If you need generic behaviour, consider using an interface or a class instead:

 <?php declare(strict_types = 1);
 
-/**
- * @template T
- */
 enum Status
 {
     case Active;
     case Inactive;
 }

How to ignore this error #

You can use the identifier enum.generic to ignore this error using a comment:

// @phpstan-ignore enum.generic
codeThatProducesTheError();

You can also use only the identifier key to ignore all errors of the same type in your configuration file in the ignoreErrors parameter:

parameters:
	ignoreErrors:
		-
			identifier: enum.generic

Rules that report this error #

• PHPStan\Rules\Generics\EnumTemplateTypeRule [1]

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