More types

Author: clue

src/functions.php

@@ -94,11 +94,11 @@ function ($error) use (&$exception, &$rejected, &$wait) {
  * @param array<callable():PromiseInterface<mixed,Exception>> $tasks
  * @return PromiseInterface<array<mixed>,Exception>
  */
-function parallel(array $tasks)
+function parallel(array $tasks): PromiseInterface
 {
     $deferred = new Deferred();
-    $results = array();
-    $errors = array();
+    $results = [];
+    $errors = [];
 
     $done = function () use (&$results, &$errors, $deferred) {
         if (count($errors)) {
@@ -145,10 +145,10 @@ function parallel(array $tasks)
  * @param array<callable():PromiseInterface<mixed,Exception>> $tasks
  * @return PromiseInterface<array<mixed>,Exception>
  */
-function series(array $tasks)
+function series(array $tasks): PromiseInterface
 {
     $deferred = new Deferred();
-    $results = array();
+    $results = [];
 
     /** @var callable():void $next */
     $taskCallback = function ($result) use (&$results, &$next) {
@@ -178,7 +178,7 @@ function series(array $tasks)
  * @param array<callable(mixed=):PromiseInterface<mixed,Exception>> $tasks
  * @return PromiseInterface<mixed,Exception>
  */
-function waterfall(array $tasks)
+function waterfall(array $tasks): PromiseInterface
 {
     $deferred = new Deferred();