Psalm: DOMDocument::appendChild returns input value where Psalm thinks its always a DOMNode

[sanmai]

This makes Psalm think that it has neither setAttribute nor getAttribute methods, yet it has them.

• https://getpsalm.org/r/39265a1f04
• https://3v4l.org/chZ0Y

$doc = new DOMDocument("1.0");
$node = $doc->createElement("foo");
$newnode = $doc->appendChild($node);
$newnode->setAttribute("bar", "baz");
var_dump($newnode->getAttribute('bar'));
var_dump(method_exists($newnode, 'getAttribute'));

[muglug]

Ah, DOMNode really doesn't have those methods. But it looks like DomDocument::appendChild, contra the documentation, returns a DomElement

[muglug]

At least in some instances

[sanmai]

Well, it appears that createElement() always returns what is given.

[sanmai]

I'm closing this as a bogus because Psalm can't help it.

[muglug]

Yes it most certainly can :)