:octocat: mark nullable types explicitly (https://github.com/chillerlan/php-qrcode/issues/276)

src/Decoder/BitMatrix.php

@@ -251,7 +251,7 @@ final class BitMatrix extends QRMatrix{
 	/**
 	 * Returns information about the format it specifies, or null if it doesn't seem to match any known pattern
 	 */
-	private function doDecodeFormatInformation(int $maskedFormatInfo1, int $maskedFormatInfo2):?int{
+	private function doDecodeFormatInformation(int $maskedFormatInfo1, int $maskedFormatInfo2):int|null{
 		$bestDifference = PHP_INT_MAX;
 		$bestFormatInfo = 0;
 
@@ -347,7 +347,7 @@ final class BitMatrix extends QRMatrix{
 	/**
 	 * Decodes the version information from the given bit sequence, returns null if no valid match is found.
 	 */
-	private function decodeVersionInformation(int $versionBits):?Version{
+	private function decodeVersionInformation(int $versionBits):Version|null{
 		$bestDifference = PHP_INT_MAX;
 		$bestVersion    = 0;
 
@@ -414,7 +414,7 @@ final class BitMatrix extends QRMatrix{
 	 * @codeCoverageIgnore
 	 * @throws \chillerlan\QRCode\Data\QRCodeDataException
 	 */
-	public function setQuietZone(int $quietZoneSize = null):static{
+	public function setQuietZone(int|null $quietZoneSize = null):static{
 		throw new QRCodeDataException('not supported');
 	}
 
@@ -422,7 +422,7 @@ final class BitMatrix extends QRMatrix{
 	 * @codeCoverageIgnore
 	 * @throws \chillerlan\QRCode\Data\QRCodeDataException
 	 */
-	public function setLogoSpace(int $width, int $height = null, int $startX = null, int $startY = null):static{
+	public function setLogoSpace(int $width, int|null $height = null, int|null $startX = null, int|null $startY = null):static{
 		throw new QRCodeDataException('not supported');
 	}
 

src/Decoder/Decoder.php

@@ -31,9 +31,9 @@ final class Decoder{
 	 * @var \chillerlan\QRCode\QROptions|\chillerlan\Settings\SettingsContainerInterface
 	 */
 	private SettingsContainerInterface|QROptions   $options;
-	private ?Version                               $version     = null;
-	private ?EccLevel                              $eccLevel    = null;
-	private ?MaskPattern                           $maskPattern = null;
+	private Version|null                           $version     = null;
+	private EccLevel|null                          $eccLevel    = null;
+	private MaskPattern|null                       $maskPattern = null;
 	private BitBuffer                              $bitBuffer;
 
 	public function __construct(SettingsContainerInterface|QROptions $options = new QROptions){

src/Decoder/DecoderResult.php

@@ -41,7 +41,7 @@ final class DecoderResult{
 	/**
 	 * DecoderResult constructor.
 	 */
-	public function __construct(iterable $properties = null){
+	public function __construct(iterable|null $properties = null){
 
 		if(!empty($properties)){