add hasser support to getAttribute()

doc/templates.rst

@@ -110,6 +110,7 @@ is set, Twig will throw an error (see :ref:`environment options<environment_opti
       (even if ``bar`` is the constructor - use ``__construct()`` instead);
     * if not, and if ``foo`` is an object, check that ``getBar`` is a valid method;
     * if not, and if ``foo`` is an object, check that ``isBar`` is a valid method;
+    * if not, and if ``foo`` is an object, check that ``hasBar`` is a valid method;
     * if not, return a ``null`` value.
 
     ``foo['bar']`` on the other hand only works with PHP arrays:

ext/twig/twig.c

@@ -972,15 +972,18 @@ PHP_FUNCTION(twig_template_get_attributes)
 		char *method = NULL;
 		char *tmp_method_name_get;
 		char *tmp_method_name_is;
+		char *tmp_method_name_has;
 		zval *zmethod;
 		zval *tmp_methods;
 
 		lcItem_length = strlen(lcItem);
 		tmp_method_name_get = emalloc(4 + lcItem_length);
 		tmp_method_name_is  = emalloc(3 + lcItem_length);
+		tmp_method_name_has  = emalloc(4 + lcItem_length);
 
 		sprintf(tmp_method_name_get, "get%s", lcItem);
 		sprintf(tmp_method_name_is, "is%s", lcItem);
+		sprintf(tmp_method_name_has, "has%s", lcItem);
 
 		tmp_methods = TWIG_GET_ARRAY_ELEMENT(tmp_class, "methods", strlen("methods") TSRMLS_CC);
 
@@ -990,6 +993,8 @@ PHP_FUNCTION(twig_template_get_attributes)
 			method = tmp_method_name_get;
 		} else if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, tmp_method_name_is, lcItem_length + 2 TSRMLS_CC)) {
 			method = tmp_method_name_is;
+		} else if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, tmp_method_name_has, lcItem_length + 3 TSRMLS_CC)) {
+			method = tmp_method_name_has;
 		} else if (TWIG_GET_ARRAY_ELEMENT(tmp_methods, "__call", 6 TSRMLS_CC)) {
 			method = item;
 			call = 1;

lib/Twig/Template.php

@@ -539,6 +539,8 @@ abstract class Twig_Template
             $method = 'get'.$item;
         } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
             $method = 'is'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['has'.$lcItem])) {
+            $method = 'has'.$item;
         } elseif (isset(self::$cache[$class]['methods']['__call'])) {
             $method = (string) $item;
             $call = true;

test/Twig/Tests/TemplateTest.php

@@ -286,6 +286,7 @@ class Twig_Tests_TemplateTest extends PHPUnit_Framework_TestCase
             'null' => null,
             '1' => 1,
             'bar' => true,
+            'foo' => true,
             '09' => '09',
             '+4' => '+4',
         );
@@ -314,6 +315,7 @@ class Twig_Tests_TemplateTest extends PHPUnit_Framework_TestCase
             array(true,  1,         1.0),
             array(true,  null,      'null'),
             array(true,  true,      'bar'),
+            array(true,  true,      'foo'),
             array(true,  '09',      '09'),
             array(true,  '+4',      '+4'),
         );
@@ -483,6 +485,7 @@ class Twig_TemplateArrayAccessObject implements ArrayAccess
         'null' => null,
         '1' => 1,
         'bar' => true,
+        'foo' => true,
         '09' => '09',
         '+4' => '+4',
     );
@@ -515,6 +518,7 @@ class Twig_TemplateMagicPropertyObject
         'null' => null,
         '1' => 1,
         'bar' => true,
+        'foo' => true,
         '09' => '09',
         '+4' => '+4',
     );
@@ -546,6 +550,7 @@ class Twig_TemplatePropertyObject
     public $zero = 0;
     public $null = null;
     public $bar = true;
+    public $foo = true;
 
     protected $protected = 'protected';
 }
@@ -622,6 +627,11 @@ class Twig_TemplateMethodObject
         return true;
     }
 
+    public function hasFoo()
+    {
+        return true;
+    }
+
     protected function getProtected()
     {
         return 'protected';