PHP 8 compatibility.

Author: janbarasek

composer.json

@@ -21,18 +21,20 @@
 		}
 	],
 	"require": {
-		"php": ">=7.2",
+		"php": "^8.0",
 		"nette/utils": "^3.0",
 		"mathematicator-core/vizualizator": "^2.0"
 	},
 	"require-dev": {
-		"brainmaestro/composer-git-hooks": "dev-master",
-		"nette/bootstrap": "^3.0",
-		"nette/tester": "^2.3",
 		"phpstan/phpstan": "^0.12.74",
+		"tracy/tracy": "^2.8",
 		"phpstan/phpstan-nette": "^0.12.14",
 		"spaze/phpstan-disallowed-calls": "^1.1",
-		"roave/security-advisories": "dev-master"
+		"roave/security-advisories": "dev-master",
+		"jetbrains/phpstorm-attributes": "^1.0",
+		"brainmaestro/composer-git-hooks": "dev-master",
+		"nette/bootstrap": "^3.0",
+		"nette/tester": "^2.3"
 	},
 	"autoload": {
 		"psr-4": {

src/MandelbrotSet.php

@@ -14,15 +14,15 @@
  */
 final class MandelbrotSet
 {
-
-	/** @var string */
-	private $tempDir;
+	private string $tempDir;
 
 
 	public function __construct(string $tempDir)
 	{
 		ini_set('max_execution_time', '100000');
-		FileSystem::createDir($tempDir);
+		if (\is_dir($tempDir) === false) {
+			FileSystem::createDir($tempDir);
+		}
 		$this->tempDir = $tempDir;
 	}
 

src/MandelbrotSetRequest.php

@@ -5,56 +5,32 @@
 namespace Mathematicator\MandelbrotSet;
 
 
-use Nette\SmartObject;
-
 final class MandelbrotSetRequest
 {
-	use SmartObject;
-
-	/** @var int */
-	private $width;
+	private int $width;
 
-	/** @var int */
-	private $height;
+	private int $height;
 
-	/** @var int */
-	private $iterations;
+	private int $iterations;
 
-	/** @var float */
-	private $minX;
+	private float $minX;
 
-	/** @var float */
-	private $maxX;
+	private float $maxX;
 
-	/** @var float */
-	private $minY;
+	private float $minY;
 
-	/** @var float */
-	private $maxY;
+	private float $maxY;
 
-	/** @var int */
-	private $deltaA;
+	private int $deltaA;
 
-	/** @var int */
-	private $deltaB;
+	private int $deltaB;
 
 
-	/**
-	 * @param int $deltaA
-	 * @param int $deltaB
-	 * @param int $width
-	 * @param int $height
-	 * @param int $iterations
-	 * @param float $minX
-	 * @param float $maxX
-	 * @param float $minY
-	 * @param float $maxY
-	 */
 	public function __construct(
 		int $deltaA,
 		int $deltaB,
 		int $width = 300,
-		$height = 300,
+		int $height = 300,
 		int $iterations = 18,
 		float $minX = -2.0,
 		float $maxX = 1.0,