feature #20047 [Form] Change FormTypeGuesserChain to accept Traversab…

…le (enumag)

This PR was merged into the 3.2-dev branch.

Discussion
----------

[Form] Change FormTypeGuesserChain to accept Traversable

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

I'm using symfony/form without the rest of the framework and this will make things a bit easier for me.

Commits
-------

5e4f4d4 [Form] Change FormTypeGuesserChain to accept Traversable

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');