added support for object instances as the second argument of the constant test (closes #1100)

CHANGELOG

@@ -1,5 +1,6 @@
 * 1.13.1 (2013-XX-XX)
 
+ * added support for object instances as the second argument of the constant test
  * fixed the include function when used in an assignment
 
 * 1.13.0 (2013-05-10)

doc/tests/constant.rst

@@ -1,6 +1,9 @@
 ``constant``
 ============
 
+.. versionadded: 1.13.1
+    constant now accepts object instances as the second argument.
+
 ``constant`` checks if a variable has the exact same value as a constant. You
 can use either global constants or class constants:
 
@@ -9,3 +12,11 @@ can use either global constants or class constants:
     {% if post.status is constant('Post::PUBLISHED') %}
         the status attribute is exactly the same as Post::PUBLISHED
     {% endif %}
+
+You can test constants from object instances as well:
+
+.. code-block:: jinja
+
+    {% if post.status is constant('PUBLISHED', post) %}
+        the status attribute is exactly the same as Post::PUBLISHED
+    {% endif %}

lib/Twig/Node/Expression/Test/Constant.php

@@ -28,6 +28,17 @@ class Twig_Node_Expression_Test_Constant extends Twig_Node_Expression_Test
             ->raw('(')
             ->subcompile($this->getNode('node'))
             ->raw(' === constant(')
+        ;
+
+        if ($this->getNode('arguments')->hasNode(1)) {
+            $compiler
+                ->raw('get_class(')
+                ->subcompile($this->getNode('arguments')->getNode(1))
+                ->raw(')."::".')
+            ;
+        }
+
+        $compiler
             ->subcompile($this->getNode('arguments')->getNode(0))
             ->raw('))')
         ;

test/Twig/Tests/Fixtures/tests/constant.test

@@ -4,9 +4,11 @@
 {{ 8 is constant('E_NOTICE') ? 'ok' : 'no' }}
 {{ 'bar' is constant('TwigTestFoo::BAR_NAME') ? 'ok' : 'no' }}
 {{ value is constant('TwigTestFoo::BAR_NAME') ? 'ok' : 'no' }}
+{{ 2 is constant('ARRAY_AS_PROPS', object) ? 'ok' : 'no' }}
 --DATA--
-return array('value' => 'bar');
+return array('value' => 'bar', 'object' => new ArrayObject(array('hi')));
 --EXPECT--
 ok
 ok
+ok
 ok