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<?php
namespace Amp;
/**
* Deferred is a container for a promise that is resolved using the resolve() and fail() methods of this object.
* The contained promise may be accessed using the promise() method. This object should not be part of a public
* API, but used internally to create and resolve a promise.
*
* @template TValue
*/
final class Deferred
{
/** @var Promise<TValue> Has public resolve and fail methods. */
private $resolver;
/** @var Promise<TValue> Hides placeholder methods */
private $promise;
public function __construct()
{
$this->resolver = new class implements Promise {
use Internal\Placeholder {
resolve as public;
fail as public;
isResolved as public;
}
};
$this->promise = new Internal\PrivatePromise($this->resolver);
}
/**
* @return Promise<TValue>
*/
public function promise(): Promise
{
return $this->promise;
}
/**
* Fulfill the promise with the given value.
*
* @param mixed $value
*
* @psalm-param TValue|Promise<TValue> $value
*
* @return void
*/
public function resolve($value = null)
{
/** @psalm-suppress UndefinedInterfaceMethod */
$this->resolver->resolve($value);
}
/**
* Fails the promise the the given reason.
*
* @param \Throwable $reason
*
* @return void
*/
public function fail(\Throwable $reason)
{
/** @psalm-suppress UndefinedInterfaceMethod */
$this->resolver->fail($reason);
}
/**
* @return bool True if the promise has been resolved.
*/
public function isResolved(): bool
{
return $this->resolver->isResolved();
}
}
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