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<?php class foo implements IteratorAggregate { public function getIterator(){ return new class implements IteratorAggregate{ public function getIterator(){ yield from [1, 2, 3]; } }; } } function iterator(Iterable $iterable): Iterator{ return $iterable instanceof Iterator ? $iterable : iterator($iterable->getIterator()); } $foo = new foo; $iterator = iterator($foo->getIterator()); foreach($iterator as $a) echo $a;
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: Return type of foo::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Xfhmj on line 5 Deprecated: Return type of IteratorAggregate@anonymous::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/Xfhmj on line 7 123

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