wip: Fix ParserNodeTypeToPHPStanType::resolve() so that it can resolve some of static/self/parent

[nsfisis]

TODO

Related: this issue was found while debugging #4079

[nsfisis]

\PHPStan\Type\ParserNodeTypeToPHPStanType::resolve() returns MixedType when an Identifier of static is passed as $type.

In contrast, \PHPStan\BetterReflection\Reflection\ReflectionClass hardcodes types for BackedEnum::from(), and it returns new Identifier('static'). BackedEnum::tryFrom() is the same except that it returns a nullable type.

https://github.com/ondrejmirtes/BetterReflection/blob/61b25baaca1ea904447f46d975a4ae7c99b722e6/src/Reflection/ReflectionClass.php#L695-L705

I couldn't determine which of the following approaches would be more appropriate:

• ParserNodeTypeToPHPStanType::resolve() should handle Identifiers of static in the same way it handles Names of static. (this pull request)
• ReflectionClass should change the return type of BackedEnum::from() from Identifier of static to Name of static.

[ondrejmirtes]

Hi, where you're encountering this problem? Without a test I don't know what you're trying to fix.

[nsfisis]

Hi, where you're encountering this problem? Without a test I don't know what you're trying to fix.

This pull request addresses a potential issue that we encountered while debugging #4079. However, the original pull request #4079 has changed its approach to fix the problem, so this pull request could become unnecessary.

I will keep this pull request as a draft until the root cause and fix for #4079 become clear.