HHVM compatibility: array sometimes can be Traversable

All checks on instance of Traversable prepended with is_object check.

See facebook/hiphop-php#1034 for details.

diff --git a/lib/Twig/Extension/Core.php b/lib/Twig/Extension/Core.php
index 7eb7f9b..60fe193 100644 (file)
--- a/lib/Twig/Extension/Core.php
+++ b/lib/Twig/Extension/Core.php
@@ -348,7 +348,7 @@ function twig_random(Twig_Environment $env, $values = null)
         return $values < 0 ? mt_rand($values, 0) : mt_rand(0, $values);
     }
 
-    if ($values instanceof Traversable) {
+    if (is_object($values) && $values instanceof Traversable) {
         $values = iterator_to_array($values);
     } elseif (is_string($values)) {
         if ('' === $values) {
@@ -620,7 +620,7 @@ function twig_array_merge($arr1, $arr2)
  */
 function twig_slice(Twig_Environment $env, $item, $start, $length = null, $preserveKeys = false)
 {
-    if ($item instanceof Traversable) {
+    if (is_object($item) && $item instanceof Traversable) {
         $item = iterator_to_array($item, false);
     }
 
@@ -687,7 +687,7 @@ function twig_last(Twig_Environment $env, $item)
  */
 function twig_join_filter($value, $glue = '')
 {
-    if ($value instanceof Traversable) {
+    if (is_object($value) && $value instanceof Traversable) {
         $value = iterator_to_array($value, false);
     }
 
@@ -829,7 +829,7 @@ function twig_in_filter($value, $compare)
         }
 
         return false !== strpos($compare, (string) $value);
-    } elseif ($compare instanceof Traversable) {
+    } elseif (is_object($compare) && $compare instanceof Traversable) {
         return in_array($value, iterator_to_array($compare, false), is_object($value));
     }
 
@@ -1335,7 +1335,7 @@ function twig_constant($constant, $object = null)
  */
 function twig_array_batch($items, $size, $fill = null)
 {
-    if ($items instanceof Traversable) {
+    if (is_object($items) && $items instanceof Traversable) {
         $items = iterator_to_array($items, false);
     }