minor symfony#14354 [Translation] DataCollectorTranslator clarifications (xabbuh)

This PR was merged into the 2.7 branch. Discussion ---------- [Translation] DataCollectorTranslator clarifications | Q | A | ------------- | --- | Bug fix? | no | New feature? | no | BC breaks? | no | Deprecations? | no | Tests pass? | yes | Fixed tickets | | License | MIT | Doc PR | Commits ------- d66d75d [Translation] DataCollectorTranslator clarifications

Author: fabpot

src/Symfony/Component/Translation/DataCollectorTranslator.php

@@ -21,7 +21,7 @@ class DataCollectorTranslator implements TranslatorInterface, TranslatorBagInter
  const MESSAGE_EQUALS_FALLBACK = 2;
 
  /**
- * @var TranslatorInterface
+ * @var TranslatorInterface|TranslatorBagInterface
  */
  private $translator;
 
@@ -31,11 +31,11 @@ class DataCollectorTranslator implements TranslatorInterface, TranslatorBagInter
  private $messages = array();
 
  /**
- * @param Translator $translator
+ * @param TranslatorInterface $translator The translator must implement TranslatorBagInterface
  */
  public function __construct(TranslatorInterface $translator)
  {
- if (!($translator instanceof TranslatorInterface && $translator instanceof TranslatorBagInterface)) {
+ if (!$translator instanceof TranslatorBagInterface) {
  throw new \InvalidArgumentException(sprintf('The Translator "%s" must implement TranslatorInterface and TranslatorBagInterface.', get_class($translator)));
  }