From 5e4f4d4a371fab6b267da5631c946f74c6feb816 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A1chym=20Tou=C5=A1ek?= <enumag@gmail.com>
Date: Sat, 24 Sep 2016 17:53:07 +0200
Subject: [PATCH] [Form] Change FormTypeGuesserChain to accept Traversable

---
 src/Symfony/Component/Form/FormTypeGuesserChain.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Symfony/Component/Form/FormTypeGuesserChain.php b/src/Symfony/Component/Form/FormTypeGuesserChain.php
index 7c4f65b43579..988c5ebc3bbb 100644
--- a/src/Symfony/Component/Form/FormTypeGuesserChain.php
+++ b/src/Symfony/Component/Form/FormTypeGuesserChain.php
@@ -25,8 +25,12 @@ class FormTypeGuesserChain implements FormTypeGuesserInterface
      *
      * @throws UnexpectedTypeException if any guesser does not implement FormTypeGuesserInterface
      */
-    public function __construct(array $guessers)
+    public function __construct($guessers)
     {
+        if (!is_array($guessers) && !$guessers instanceof \Traversable) {
+            throw new UnexpectedTypeException($guessers, 'array or Traversable');
+        }
+
         foreach ($guessers as $guesser) {
             if (!$guesser instanceof FormTypeGuesserInterface) {
                 throw new UnexpectedTypeException($guesser, 'Symfony\Component\Form\FormTypeGuesserInterface');