More nullable and void typehints

src/pocketmine/scheduler/AsyncTask.php

@@ -196,7 +196,7 @@ abstract class AsyncTask extends \Threaded{
 	 *
 	 * @param mixed $progress A value that can be safely serialize()'ed.
 	 */
-	public function publishProgress($progress){
+	public function publishProgress($progress) : void{
 		$this->progressUpdates[] = serialize($progress);
 	}
 

src/pocketmine/scheduler/AsyncWorker.php

@@ -45,7 +45,7 @@ class AsyncWorker extends Worker{
 		$this->memoryLimit = $memoryLimit;
 	}
 
-	public function run(){
+	public function run() : void{
 		error_reporting(-1);
 
 		$this->registerClassLoader();
@@ -73,7 +73,7 @@ class AsyncWorker extends Worker{
 		return $this->logger;
 	}
 
-	public function handleException(\Throwable $e){
+	public function handleException(\Throwable $e) : void{
 		$this->logger->logException($e);
 	}
 

src/pocketmine/scheduler/ClosureTask.php

@@ -53,7 +53,7 @@ class ClosureTask extends Task{
 		return Utils::getNiceClosureName($this->closure);
 	}
 
-	public function onRun(int $currentTick){
+	public function onRun(int $currentTick) : void{
 		($this->closure)($currentTick);
 	}
 }

src/pocketmine/scheduler/Task.php

@@ -55,7 +55,7 @@ abstract class Task{
 	/**
 	 * @param TaskHandler|null $taskHandler
 	 */
-	final public function setHandler(?TaskHandler $taskHandler){
+	final public function setHandler(?TaskHandler $taskHandler) : void{
 		if($this->taskHandler === null or $taskHandler === null){
 			$this->taskHandler = $taskHandler;
 		}

src/pocketmine/scheduler/TaskHandler.php

@@ -89,7 +89,7 @@ class TaskHandler{
 	/**
 	 * @param int $ticks
 	 */
-	public function setNextRun(int $ticks){
+	public function setNextRun(int $ticks) : void{
 		$this->nextRun = $ticks;
 	}
 
@@ -135,7 +135,7 @@ class TaskHandler{
 		return $this->period;
 	}
 
-	public function cancel(){
+	public function cancel() : void{
 		try{
 			if(!$this->isCancelled()){
 				$this->task->onCancel();
@@ -145,7 +145,7 @@ class TaskHandler{
 		}
 	}
 
-	public function remove(){
+	public function remove() : void{
 		$this->cancelled = true;
 		$this->task->setHandler(null);
 	}
@@ -153,7 +153,7 @@ class TaskHandler{
 	/**
 	 * @param int $currentTick
 	 */
-	public function run(int $currentTick){
+	public function run(int $currentTick) : void{
 		$this->timings->startTiming();
 		try{
 			$this->task->onRun($currentTick);

src/pocketmine/scheduler/TaskScheduler.php

@@ -65,7 +65,7 @@ class TaskScheduler{
 	 *
 	 * @return TaskHandler
 	 */
-	public function scheduleTask(Task $task){
+	public function scheduleTask(Task $task) : TaskHandler{
 		return $this->addTask($task, -1, -1);
 	}
 
@@ -75,7 +75,7 @@ class TaskScheduler{
 	 *
 	 * @return TaskHandler
 	 */
-	public function scheduleDelayedTask(Task $task, int $delay){
+	public function scheduleDelayedTask(Task $task, int $delay) : TaskHandler{
 		return $this->addTask($task, $delay, -1);
 	}
 
@@ -85,7 +85,7 @@ class TaskScheduler{
 	 *
 	 * @return TaskHandler
 	 */
-	public function scheduleRepeatingTask(Task $task, int $period){
+	public function scheduleRepeatingTask(Task $task, int $period) : TaskHandler{
 		return $this->addTask($task, -1, $period);
 	}
 
@@ -96,14 +96,14 @@ class TaskScheduler{
 	 *
 	 * @return TaskHandler
 	 */
-	public function scheduleDelayedRepeatingTask(Task $task, int $delay, int $period){
+	public function scheduleDelayedRepeatingTask(Task $task, int $delay, int $period) : TaskHandler{
 		return $this->addTask($task, $delay, $period);
 	}
 
 	/**
 	 * @param int $taskId
 	 */
-	public function cancelTask(int $taskId){
+	public function cancelTask(int $taskId) : void{
 		if(isset($this->tasks[$taskId])){
 			try{
 				$this->tasks[$taskId]->cancel();
@@ -113,7 +113,7 @@ class TaskScheduler{
 		}
 	}
 
-	public function cancelAllTasks(){
+	public function cancelAllTasks() : void{
 		foreach($this->tasks as $id => $task){
 			$this->cancelTask($id);
 		}
@@ -142,7 +142,7 @@ class TaskScheduler{
 	 *
 	 * @throws \InvalidStateException
 	 */
-	private function addTask(Task $task, int $delay, int $period){
+	private function addTask(Task $task, int $delay, int $period) : TaskHandler{
 		if(!$this->enabled){
 			throw new \InvalidStateException("Tried to schedule task to disabled scheduler");
 		}
@@ -186,7 +186,7 @@ class TaskScheduler{
 	/**
 	 * @param int $currentTick
 	 */
-	public function mainThreadHeartbeat(int $currentTick){
+	public function mainThreadHeartbeat(int $currentTick) : void{
 		$this->currentTick = $currentTick;
 		while($this->isReady($this->currentTick)){
 			/** @var TaskHandler $task */