Enum::from and Enum::tryFrom doesn't work with templates

[thomasvargiu]

Enum::from and Enum::tryFrom doesn't work with templates

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/37aa7581e8

<?php

enum EnumA: string {
    case FOO = 'foo';
    case BAR = 'bar';
}

/**
 * @template T of EnumA
 */
class A {
    /** @var value-of<T> */
    public $status;
    
    public function getStatus()
    {
        /** @psalm-trace $status */
        $status = $this->status;
        /** @psalm-trace $e1 */
        $e1 = EnumA::tryFrom($status);
    }
}

Psalm output (using commit 16b24bd):

INFO: Trace - 18:9 - $status: value-of<T:A as EnumA>

INFO: Trace - 20:9 - $e1: null

INFO: UnusedVariable - 20:9 - $e1 is never referenced or the value is not used

INFO: MissingReturnType - 15:21 - Method A::getStatus does not have a return type, expecting void

ERROR: MissingConstructor - 13:12 - A has an uninitialized property A::$status, but no constructor

https://psalm.dev/r/044762b144

<?php

enum EnumA: string {
    case FOO = 'foo';
    case BAR = 'bar';
}

/**
 * @template T of EnumA
 */
class A {
    /** @var value-of<T> */
    public $status;
    
    public function getStatus()
    {
        /** @var value-of<EnumA> $status */
        $status = $this->status;
        /** @psalm-trace $e1 */
        $e1 = EnumA::tryFrom($status);
    }
}

Psalm output (using commit 16b24bd):

INFO: Trace - 20:9 - $e1: enum(EnumA::BAR)|enum(EnumA::FOO)|null

INFO: UnusedVariable - 20:9 - $e1 is never referenced or the value is not used

INFO: MissingReturnType - 15:21 - Method A::getStatus does not have a return type, expecting void

ERROR: MissingConstructor - 13:12 - A has an uninitialized property A::$status, but no constructor