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<?php
namespace Illuminate\Container;
use Countable;
use IteratorAggregate;
class RewindableGenerator implements Countable, IteratorAggregate
{
/**
* The generator callback.
*
* @var callable
*/
protected $generator;
/**
* The number of tagged services.
*
* @var callable|int
*/
protected $count;
/**
* Create a new generator instance.
*
* @param callable $generator
* @param callable|int $count
* @return void
*/
public function __construct(callable $generator, $count)
{
$this->count = $count;
$this->generator = $generator;
}
/**
* Get an iterator from the generator.
*
* @return mixed
*/
public function getIterator()
{
return ($this->generator)();
}
/**
* Get the total number of tagged services.
*
* @return int
*/
public function count()
{
if (is_callable($count = $this->count)) {
$this->count = $count();
}
return $this->count;
}
}