/**
* Value is recursively resolved, but we never wait it.
* This function must be called along with Co::wait().
* @param mixed $value
* @param mixed $throw
*/
public static function async($value, $throw = null)
{
if (!self::$self) {
throw new \BadMethodCallException('Co::async() must be called along with Co::wait(). ');
}
if ($throw !== null) {
$throw = filter_var($throw, FILTER_VALIDATE_BOOLEAN, ['flags' => FILTER_NULL_ON_FAILURE]);
if ($throw === null) {
throw new \InvalidArgumentException("\$throw must be null or boolean.");
}
}
self::$self->start($value, false, $throw);
}
