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Hello internals!
Currently, iterator_count has the following signature:
iterator_count(Traversable|array $iterator): int
If we try to use iterable type and pass it to iterator_count function, we'd
get following static analysis error:
Argument 1 of iterator_count expects Traversable|array<array-key, mixed>,
but iterable<int, list<string>> provided (see https://psalm.dev/004)
$start(iterator_count($chunks));
From what I know, iterable is just built-in compile time type alias
for array|Traversable
(https://www.php.net/manual/en/language.types.iterable.php)
I think it would make sense to change the signature of iterator_count to
accept iterable rather than array|Traversable so that static analysis tools
would pick it up better