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<?php |
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namespace mpyw\Co\Internal; |
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use mpyw\Co\CoInterface; |
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class GeneratorContainer |
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{ |
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/** |
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* Generator. |
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* @var \Generator |
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*/ |
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private $g; |
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/** |
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* Generator object hash. |
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* @var string |
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*/ |
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private $h; |
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/** |
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* Thrown exception. |
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* @var \RuntimeException |
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*/ |
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private $e; |
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/** |
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* Parent yield key. |
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* @var mixed |
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*/ |
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private $yieldKey; |
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/** |
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* Constructor. |
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* @param \Generator $g |
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*/ |
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public function __construct(\Generator $g, $yield_key = null) |
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{ |
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$this->g = $g; |
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$this->h = spl_object_hash($g); |
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$this->yieldKey = $yield_key; |
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$this->valid(); |
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} |
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/** |
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* Return parent yield key. |
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* @return mixed |
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*/ |
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public function getYieldKey() |
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{ |
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return $this->yieldKey; |
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} |
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/** |
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* Return generator hash. |
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* @return string |
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*/ |
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public function __toString() |
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{ |
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return $this->h; |
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} |
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/** |
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* Return whether generator is actually working. |
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* @return bool |
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*/ |
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public function valid() |
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{ |
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try { |
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$this->g->current(); |
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return $this->e === null && $this->g->valid() && $this->g->key() !== CoInterface::RETURN_WITH; |
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} catch (\RuntimeException $e) { |
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$this->e = $e; |
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return false; |
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} |
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} |
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/** |
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* Return current key. |
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* @return mixed |
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*/ |
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public function key() |
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{ |
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$this->validateValidity(); |
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return $this->g->key(); |
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} |
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/** |
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* Return current value. |
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* @return mixed |
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*/ |
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public function current() |
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{ |
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$this->validateValidity(); |
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return $this->g->current(); |
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} |
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/** |
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* Send value into generator. |
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* @param mixed $value |
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* @NOTE: This method returns nothing, |
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* while original generator returns something. |
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*/ |
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public function send($value) |
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{ |
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$this->validateValidity(); |
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try { |
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$this->g->send($value); |
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} catch (\RuntimeException $e) { |
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$this->e = $e; |
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} |
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} |
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/** |
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* Throw exception into generator. |
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* @param \RuntimeException $e |
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* @NOTE: This method returns nothing, |
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* while original generator returns something. |
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*/ |
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public function throw_(\RuntimeException $e) |
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{ |
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$this->validateValidity(); |
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try { |
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$this->g->throw($e); |
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} catch (\RuntimeException $e) { |
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$this->e = $e; |
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} |
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} |
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/** |
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* Return whether exception is thrown. |
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* @return bool |
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*/ |
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public function thrown() |
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{ |
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return $this->e !== null; |
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} |
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/** |
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* Return value that generator has returned or thrown. |
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* @return mixed |
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*/ |
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public function getReturnOrThrown() |
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{ |
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$this->validateInvalidity(); |
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if ($this->e === null && $this->g->valid() && !$this->valid()) { |
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return $this->g->current(); |
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} |
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if ($this->e) { |
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return $this->e; |
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} |
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return method_exists($this->g, 'getReturn') ? $this->g->getReturn() : null; |
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} |
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/** |
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* Validate that generator has finished running. |
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* @throws LogicException |
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*/ |
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private function validateValidity() |
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{ |
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if (!$this->valid()) { |
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throw new \BadMethodCallException('Unreachable here.'); |
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} |
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} |
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/** |
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* Validate that generator is still running. |
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* @throws LogicException |
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*/ |
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private function validateInvalidity() |
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{ |
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if ($this->valid()) { |
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throw new \BadMethodCallException('Unreachable here.'); |
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} |
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} |
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} |
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mpyw /
co
