/**
* @param \Generator $generator
*/
public function __construct(Generator $generator)
{
$this->generator = $generator;
parent::__construct(function (callable $resolve, callable $reject) {
/**
* @param mixed $value The value to send to the generator.
* @param \Throwable|null $exception Exception object to be thrown into the generator if not null.
*/
$this->worker = function ($value = null, Throwable $exception = null) use($resolve, $reject) {
if ($this->paused) {
// If paused, mark coroutine as ready to resume.
$this->ready = true;
return;
}
try {
if ($this->initial) {
// Get result of first yield statement.
$this->initial = false;
$this->current = $this->generator->current();
} elseif (null !== $exception) {
// Throw exception at current execution point.
$this->current = $this->generator->throw($exception);
} else {
// Send the new value and execute to next yield statement.
$this->current = $this->generator->send($value);
}
if (!$this->generator->valid()) {
$resolve($this->generator->getReturn());
$this->close();
return;
}
if ($this->current instanceof Generator) {
$this->current = new self($this->current);
}
if ($this->current instanceof PromiseInterface) {
$this->current->done($this->worker, $this->capture);
} else {
Loop\queue($this->worker, $this->current);
}
} catch (Throwable $exception) {
$reject($exception);
$this->close();
}
};
/**
* @param \Throwable $exception Exception to be thrown into the generator.
*/
$this->capture = function (Throwable $exception) {
if (null !== $this->worker) {
// Coroutine may have been closed.
($this->worker)(null, $exception);
}
};
Loop\queue($this->worker);
return function (Throwable $exception) {
try {
$current = $this->generator->current();
// Get last yielded value.
while ($this->generator->valid()) {
if ($current instanceof PromiseInterface) {
$current->cancel($exception);
}
$current = $this->generator->throw($exception);
}
} finally {
$this->close();
}
};
});
}
/**
* @param \Generator $generator
*/
public function __construct(Generator $generator)
{
$this->generator = $generator;
parent::__construct(function (callable $resolve, callable $reject) {
$yielded = $this->generator->current();
if (!$this->generator->valid()) {
$resolve($this->generator->getReturn());
$this->close();
return;
}
/**
* @param mixed $value The value to send to the generator.
*/
$this->send = function ($value = null) use($resolve, $reject) {
if ($this->paused) {
// If paused, save callable and value for resuming.
$this->next = [$this->send, $value];
return;
}
try {
// Send the new value and execute to next yield statement.
$yielded = $this->generator->send($value);
if (!$this->generator->valid()) {
$resolve($this->generator->getReturn());
$this->close();
return;
}
$this->next($yielded);
} catch (Throwable $exception) {
$reject($exception);
$this->close();
}
};
/**
* @param \Throwable $exception Exception to be thrown into the generator.
*/
$this->capture = function (Throwable $exception) use($resolve, $reject) {
if ($this->paused) {
// If paused, save callable and exception for resuming.
$this->next = [$this->capture, $exception];
return;
}
try {
// Throw exception at current execution point.
$yielded = $this->generator->throw($exception);
if (!$this->generator->valid()) {
$resolve($this->generator->getReturn());
$this->close();
return;
}
$this->next($yielded);
} catch (Throwable $exception) {
$reject($exception);
$this->close();
}
};
$this->next($yielded);
return function (Throwable $exception) {
try {
$current = $this->generator->current();
// Get last yielded value.
if ($current instanceof PromiseInterface) {
$current->cancel($exception);
}
} finally {
$this->close();
}
};
});
}
