Skip to content

Error when trying to infer type with Option::filter() into a function that requires (Closure(Tv): T) #27

@devnix

Description

@devnix

In relation to #25 and the conversation in #26, I have a strange case that I've been able to replicate in a unit test on this repository:

Parameter #2 $function of function Psl\Dict\map expects Closure(string): Psl\Option\Option<Tv&non-empty-string>, Closure(string): Psl\Option\Option<non-empty-string> given.
\Psl\Dict\map(
	\Psl\Type\dict(\Psl\Type\array_key(), \Psl\Type\string())
		->coerce($data),
	function (string $value): \Psl\Option\Option {
		return \Psl\Option\Option::some($value)
			->filter(\Psl\Type\non_empty_string()->matches(...));
	}
);

I've thought about doing an intersection of $originalType and $refinedType at https://github.com/php-standard-library/phpstan-extension/blob/2.0.x/src/Option/OptionFilterReturnTypeExtension.php#L66 but it worsens:

Parameter #2 $function of function Psl\Dict\map expects Closure(string): Psl\Option\Option<(string&Tv)&(Tv&non-empty-string)>, Closure(string): Psl\Option\Option<non-empty-string&string> given.

Also I've been diving into the different APIs but I've not been able to come up with a solution, and I'm not sure if I should dig more or if it's a current bug in the type system that I should assume it's not fixable on this plugin.

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions