Creates a promise that is resolved using a generator that yields values or
promises (somewhat similar to C#'s async keyword).
When called, the Coroutine::of method will start an instance of the generator
and returns a promise that is fulfilled with its final yielded value.
Control is returned back to the generator when the yielded promise settles.
This can lead to less verbose code when doing lots of sequential async calls
with minimal processing in between.
use GuzzleHttp\Promise;
function createPromise($value) {
return new Promise\FulfilledPromise($value);
}
$promise = Promise\Coroutine::of(function () {
$value = (yield createPromise('a'));
try {
$value = (yield createPromise($value . 'b'));
} catch (\Exception $e) {
// The promise was rejected.
}
yield $value . 'c';
});
// Outputs "abc"
$promise->then(function ($v) { echo $v; });
- param callable $generatorFn Generator function to wrap into a promise.
- return \Promise
- link https://github.
com/petkaantonov/bluebird/blob/master/API. inspirationmd#generators
CloneableFinalInstantiable
| Constants |
| Methods |
| public __construct(callable $generatorFn) |
public _handleFailure( $reason)
|
public _handleSuccess( $value)
|
| public cancel() |
| public getState() |
| public static of(callable $generatorFn) Create a new coroutine.
|
| public otherwise(callable $onRejected) |
| public reject( $reason) |
| public resolve( $value) |
| public then(?callable $onFulfilled = NULL, ?callable $onRejected = NULL) |
| public wait( $unwrap = true) |
| Properties |
private $currentPromise = NULL
|
private $generator = NULL
|
private $result = NULL
|
| Methods |
| private nextCoroutine( $yielded) |
| Methods |
| public static of(callable $generatorFn) Create a new coroutine.
|