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<?php interface I { public function go(iterable $x): void; } final class Test implements I { public function go(iterable|Generator $x): void { echo 'It\'s work!'; } } (new Test())->go([]); echo "\n"; (new Test())->go((static fn() => yield 1)());
Output for git.master, git.master_jit, rfc.property-hooks
It's work! It's work!

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