Dumper: can dump static Closure

Author: dg

src/PhpGenerator/Dumper.php

@@ -127,6 +127,10 @@ private function dumpObject(&$var, array $parents, int $level): string
 			return '\\' . get_class($var) . '::' . $var->name;
 
 		} elseif ($var instanceof \Closure) {
+			$inner = Nette\Utils\Callback::unwrap($var);
+			if (Nette\Utils\Callback::isStatic($inner)) {
+				return '\Closure::fromCallable(' . $this->dump($inner) . ')';
+			}
 			throw new Nette\InvalidArgumentException('Cannot dump closure.');
 		}
 

tests/PhpGenerator/Dumper.dump().phpt

@@ -127,6 +127,16 @@ Assert::exception(function () {
 
 
 // closures
+Assert::same(
+	"\\Closure::fromCallable('strlen')",
+	$dumper->dump(Closure::fromCallable('strlen'))
+);
+
+Assert::same(
+	"\\Closure::fromCallable(['Nette\\PhpGenerator\\ClassType', 'from'])",
+	$dumper->dump(Closure::fromCallable([Nette\PhpGenerator\ClassType::class, 'from']))
+);
+
 Assert::exception(function () {
 	$dumper = new Dumper;
 	$dumper->dump(function () {});