Reverted errorHandler setter to a method.

VERSION

@@ -1 +1 @@
-0.2503.72020
+0.2503.72025

src/Http/Routing/Router.php

@@ -6,6 +6,7 @@
 namespace Index\Http\Routing;
 
 use Stringable;
+use InvalidArgumentException;
 use JsonSerializable;
 use Index\Bencode\{Bencode,BencodeSerializable};
 use Index\Http\{HttpRequest,HttpStream};
@@ -37,14 +38,14 @@ class Router implements RequestHandlerInterface {
 
     /**
      * @param string $charSet Default character set to specify when none is present.
-     * @param ErrorHandler|string $errorHandler Error handling to use for error responses with an empty body. 'html' for the default HTML implementation, 'plain' for the plaintext implementation.
+     * @param ErrorHandler|'html'|'plain' $errorHandler Error handling to use for error responses with an empty body. 'html' for the default HTML implementation, 'plain' for the plaintext implementation.
      */
     public function __construct(
         string $charSet = '',
         ErrorHandler|string $errorHandler = 'html'
     ) {
         $this->charSetValue = $charSet;
-        $this->errorHandler = $errorHandler;
+        $this->setErrorHandler($errorHandler);
     }
 
     /**
@@ -68,33 +69,37 @@ class Router implements RequestHandlerInterface {
 
     /**
      * Error handler instance.
-     *
-     * @var ErrorHandler
      */
-    public ErrorHandler $errorHandler {
-        get => $this->errorHandler;
-        set(ErrorHandler|string $handler) {
-            if($handler instanceof ErrorHandler)
-                $this->errorHandler = $handler;
-            elseif($handler === 'html')
-                $this->setHtmlErrorHandler();
-            else // plain
-                $this->setPlainErrorHandler();
-        }
+    public ErrorHandler $errorHandler;
+
+    /**
+     * Sets an error handler.
+     *
+     * @param ErrorHandler|'html'|'plain' $handler
+     */
+    public function setErrorHandler(ErrorHandler|string $handler): void {
+        if($handler instanceof ErrorHandler)
+            $this->errorHandler = $handler;
+        elseif($handler === 'html')
+            $this->errorHandler = new HtmlErrorHandler;
+        elseif($handler === 'plain')
+            $this->errorHandler = new PlainErrorHandler;
+        else
+            throw new InvalidArgumentException('$handler must be an instance of ErrorHandler or "html" or "plain"');
     }
 
     /**
      * Set the error handler to the basic HTML one.
      */
     public function setHtmlErrorHandler(): void {
-        $this->errorHandler = new HtmlErrorHandler;
+        $this->setErrorHandler('html');
     }
 
     /**
      * Set the error handler to the plain text one.
      */
     public function setPlainErrorHandler(): void {
-        $this->errorHandler = new PlainErrorHandler;
+        $this->setErrorHandler('plain');
     }
 
     /**