Enum Interfaces cannot be found

[cseufert]

Here is an example of trying to unmarshal a value based on reflecting the type expected $class. Psalm complains that the InBackedNum interface cannot be found. Does this need to be stubbed?

I have had a read of the previous enum issues, and there's no mention of this type of use-case.

<?php
/** @var class-string $class */
$class = 'test';

if (is_a($class, \IntBackedEnum::class, true)) {
	return $class::from((int) $v->toString());
}

https://psalm.dev/r/8c09bf5115

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/8c09bf5115

<?php
/** @var class-string $class */
$class = 'test';

if (is_a($class, \IntBackedEnum::class, true)) {
	return $class::from((int) $v->toString());
}

Psalm output (using commit 16b24bd):

ERROR: UndefinedClass - 5:18 - Class, interface or enum named IntBackedEnum does not exist

INFO: MixedArgument - 5:18 - Argument 2 of is_a cannot be mixed, expecting class-string

ERROR: UndefinedClass - 6:9 - Class, interface or enum named IntBackedEnum does not exist

ERROR: UndefinedGlobalVariable - 6:28 - Cannot find referenced variable $v in global scope

INFO: MixedMethodCall - 6:32 - Cannot determine the type of $v when calling method toString

[cseufert]

You also cant type-hint via a class string \IntBackedEnum either.

https://psalm.dev/r/d0694ad217

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/d0694ad217

<?php
/** @var class-string<\IntBackedEnum> $class */
$enum = 'MyEnum';

$enum::cases();

Psalm output (using commit 16b24bd):

ERROR: UndefinedDocblockClass - 3:1 - Docblock-defined class, interface or enum named IntBackedEnum does not exist

ERROR: InvalidStringClass - 5:1 - String cannot be used as a class