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<?php declare(strict_types=1); /** * @template TKey * @template TValue * @implements IteratorAggregate<TKey, TValue> */ final class RewindableGenerator implements IteratorAggregate { /** * @param callable(): Generator<TKey, TValue> $generatorFunction */ public function __construct(private $generatorFunction) {} public function getIterator(): Traversable { return ($this->generatorFunction)(); } } /** * @return Generator<int, int> */ function thousand(): Generator { for ($i = 0; $i < 1000; ++$i) { yield $i; } } $thousand = new RewindableGenerator(thousand(...)); foreach ($thousand as $i); foreach ($thousand as $i); foreach ($thousand as $i);
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