used is_iterable

Author: dg

src/Forms/Container.php

@@ -136,8 +136,8 @@ public function validate(array $controls = NULL): void
 			}
 		}
 		if ($this->onValidate !== NULL) {
-			if (!is_array($this->onValidate) && !$this->onValidate instanceof \Traversable) {
-				throw new Nette\UnexpectedValueException('Property Form::$onValidate must be array or Traversable, ' . gettype($this->onValidate) . ' given.');
+			if (!is_iterable($this->onValidate)) {
+				throw new Nette\UnexpectedValueException('Property Form::$onValidate must be iterable, ' . gettype($this->onValidate) . ' given.');
 			}
 			foreach ($this->onValidate as $handler) {
 				$params = Nette\Utils\Callback::toReflection($handler)->getParameters();

src/Forms/ControlGroup.php

@@ -45,7 +45,7 @@ public function add(...$items)
 				foreach ($item->getComponents() as $component) {
 					$this->add($component);
 				}
-			} elseif ($item instanceof \Traversable || is_array($item)) {
+			} elseif (is_iterable($item)) {
 				$this->add(...$item);
 
 			} else {

src/Forms/Form.php

@@ -407,8 +407,8 @@ public function fireEvents(): void
 			$this->onError($this);
 
 		} elseif ($this->onSuccess !== NULL) {
-			if (!is_array($this->onSuccess) && !$this->onSuccess instanceof \Traversable) {
-				throw new Nette\UnexpectedValueException('Property Form::$onSuccess must be array or Traversable, ' . gettype($this->onSuccess) . ' given.');
+			if (!is_iterable($this->onSuccess)) {
+				throw new Nette\UnexpectedValueException('Property Form::$onSuccess must be iterable, ' . gettype($this->onSuccess) . ' given.');
 			}
 			foreach ($this->onSuccess as $handler) {
 				$params = Nette\Utils\Callback::toReflection($handler)->getParameters();

tests/Forms/Container.validate().phpt

@@ -40,4 +40,4 @@ Assert::exception(function () {
 	$form = new Form;
 	$form->onValidate = TRUE;
 	$form->validate();
-}, Nette\UnexpectedValueException::class, 'Property Form::$onValidate must be array or Traversable, boolean given.');
+}, Nette\UnexpectedValueException::class, 'Property Form::$onValidate must be iterable, boolean given.');

tests/Forms/Forms.onSuccess.phpt

@@ -61,4 +61,4 @@ Assert::exception(function () {
 	$form = new Form;
 	$form->onSuccess = TRUE;
 	$form->fireEvents();
-}, Nette\UnexpectedValueException::class, 'Property Form::$onSuccess must be array or Traversable, boolean given.');
+}, Nette\UnexpectedValueException::class, 'Property Form::$onSuccess must be iterable, boolean given.');