Dumper:: $customObjects can be handler

Author: dg

src/PhpGenerator/Dumper.php

@@ -22,7 +22,7 @@ final class Dumper
 	public int $maxDepth = 50;
 	public int $wrapLength = 120;
 	public string $indentation = "\t";
-	public bool $customObjects = true;
+	public bool|\Closure $customObjects = true;
 	public bool $ref = false;
 	private array $references;
 
@@ -191,6 +191,9 @@ private function dumpObject(object $var, array $parents, int $level, int $column
 
 			throw new Nette\InvalidStateException('Cannot dump object of type Closure.');
 
+		} elseif ($this->customObjects instanceof \Closure) {
+			return ($this->customObjects)($var, fn($v) => $this->dumpVar($v, $parents, $level + 1));
+
 		} elseif ($this->customObjects) {
 			return $this->dumpCustomObject($var, $parents, $level);
 

tests/PhpGenerator/Dumper.dump().phpt

@@ -208,3 +208,25 @@ Assert::exception(
 	Nette\InvalidStateException::class,
 	'Cannot dump object of type TestSer.',
 );
+
+
+// handler for custom objects
+$dumper = new Dumper;
+$dumper->customObjects = function (mixed $val, $dumper) {
+	Assert::type(TestSer::class, $val);
+	Assert::same('[1, 2]', $dumper([1, 2]));
+	return 'res';
+};
+Assert::same('res', $dumper->dump(new TestSer));
+
+
+// handler for custom objects: recursive dependency
+$dumper = new Dumper;
+$dumper->customObjects = function (mixed $val, $dumper) {
+	$dumper($val);
+};
+Assert::exception(
+	fn() => $dumper->dump(new TestSer),
+	Nette\InvalidStateException::class,
+	'Nesting level too deep or recursive dependency.',
+);