increase phpstan level to 8

phpstan.neon

@@ -1,5 +1,5 @@
 parameters:
-	level: 6
+	level: 8
 	checkMissingIterableValueType: false
 
 	paths:

src/Schema/Message.php

@@ -95,6 +95,6 @@ public function toString(): string
 		return preg_replace_callback('~( ?)%(\w+)%~', function ($m) use ($vars) {
 			[, $space, $key] = $m;
 			return $vars[$key] === null ? '' : $space . $vars[$key];
-		}, $this->message);
+		}, $this->message) ?? throw new Nette\InvalidStateException(preg_last_error_msg());
 	}
 }

src/Schema/Processor.php

@@ -20,7 +20,7 @@ final class Processor
 	use Nette\SmartObject;
 
 	public array $onNewContext = [];
-	private ?Context $context;
+	private Context $context;
 	private bool $skipDefaults = false;
 
 
@@ -36,7 +36,7 @@ public function skipDefaults(bool $value = true): void
 	 */
 	public function process(Schema $schema, mixed $data): mixed
 	{
-		$this->createContext();
+		$this->context = $this->createContext();
 		$data = $schema->normalize($data, $this->context);
 		$this->throwsErrors();
 		$data = $schema->complete($data, $this->context);
@@ -51,7 +51,7 @@ public function process(Schema $schema, mixed $data): mixed
 	 */
 	public function processMultiple(Schema $schema, array $dataset): mixed
 	{
-		$this->createContext();
+		$this->context = $this->createContext();
 		$flatten = null;
 		$first = true;
 		foreach ($dataset as $data) {
@@ -89,10 +89,11 @@ private function throwsErrors(): void
 	}
 
 
-	private function createContext(): void
+	private function createContext(): Context
 	{
-		$this->context = new Context;
-		$this->context->skipDefaults = $this->skipDefaults;
-		Nette\Utils\Arrays::invoke($this->onNewContext, $this->context);
+		$context = new Context;
+		$context->skipDefaults = $this->skipDefaults;
+		Nette\Utils\Arrays::invoke($this->onNewContext, $context);
+		return $context;
 	}
 }