converted the range filter to a function

CHANGELOG

@@ -3,6 +3,7 @@
 Backward incompatibilities:
 
  * the items filter, which has been deprecated for quite a long time now, has been removed
+ * the range filter has been converted to a function: 0|range(10) -> range(0, 10)
 
 Changes:
 

doc/templates.rst

@@ -511,11 +511,12 @@ The ``..`` operator can take any expression at both sides:
       * {{ letter }}
     {% endfor %}
 
-If you need a step different from 1, you can use the ``range`` filter instead:
+If you need a step different from 1, you can use the ``range`` function
+instead:
 
 .. code-block:: jinja
 
-    {% for i in 0|range(10, 2) %}
+    {% for i in range(0, 10, 2) %}
       * {{ i }}
     {% endfor %}
 
@@ -1247,41 +1248,6 @@ the length of a string.
 
 The ``sort`` filter sorts an array.
 
-``range`` (new in Twig 0.9.5)
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-Returns a list containing a sequence of numbers. The left side of the filter
-represents the low value. The first argument of the filter is mandatory and
-represents the high value. The second argument is optional and represents the
-step (which defaults to ``1``).
-
-If you do need to iterate over a sequence of numbers:
-
-.. code-block:: jinja
-
-    {% for i in 0|range(10) %}
-      * {{ i }}
-    {% endfor %}
-
-.. tip::
-
-    The ``range`` filter works as the native PHP ``range`` function.
-
-The ``..`` operator (see above) is a syntactic sugar for the ``range`` filter
-(with a step of 1):
-
-.. code-block:: jinja
-
-    {% for i in 0|range(10) %}
-      * {{ i }}
-    {% endfor %}
-
-    {# is equivalent to #}
-
-    {% for i in 0..10 %}
-      * {{ i }}
-    {% endfor %}
-
 ``default``
 ~~~~~~~~~~~
 
@@ -1452,6 +1418,44 @@ useful if you use the ``strict_variables`` option:
         ...
     {% endif %}
 
+List of Global Functions
+------------------------
+
+The following functions are available in the global scope by default:
+
+``range``
+~~~~~~~~~
+
+Returns a list containing an arithmetic progression of integers. When step is
+given, it specifies the increment (or decrement):
+
+.. code-block:: jinja
+
+    {% for i in range(0, 3) %}
+        {{ i }},
+    {% endfor %}
+
+    {# returns 0, 1, 2, 3 #}
+
+    {% for i in range(0, 6, 2) %}
+        {{ i }},
+    {% endfor %}
+
+    {# returns 0, 2, 4, 6 #}
+
+.. tip::
+
+    The ``range`` function works as the native PHP ``range`` function.
+
+The ``..`` operator is a syntactic sugar for the ``range`` function (with a
+step of 1):
+
+.. code-block:: jinja
+
+    {% for i in 0..10 %}
+        {{ i }},
+    {% endfor %}
+
 Extensions
 ----------
 

lib/Twig/Extension/Core.php

@@ -64,7 +64,6 @@ class Twig_Extension_Core extends Twig_Extension
             'reverse' => new Twig_Filter_Function('twig_reverse_filter'),
             'length'  => new Twig_Filter_Function('twig_length_filter', array('needs_environment' => true)),
             'sort'    => new Twig_Filter_Function('twig_sort_filter'),
-            'range'   => new Twig_Filter_Function('twig_range_filter'),
             'cycle'   => new Twig_Filter_Function('twig_cycle_filter'),
             'merge'   => new Twig_Filter_Function('twig_array_merge'),
 
@@ -85,6 +84,23 @@ class Twig_Extension_Core extends Twig_Extension
         return $filters;
     }
 
+    /**
+     * Returns a list of global functions to add to the existing list.
+     *
+     * @return array An array of global functions
+     */
+    public function getGlobals()
+    {
+        return array(
+            'fn_range' => new Twig_Function($this, 'getRange'),
+        );
+    }
+
+    public function getRange($start, $end, $step = 1)
+    {
+        return range($start, $end, $step);
+    }
+
     /**
      * Returns a list of filters to add to the existing list.
      *
@@ -254,11 +270,6 @@ function twig_in_filter($value, $compare)
     return false;
 }
 
-function twig_range_filter($start, $end, $step = 1)
-{
-    return range($start, $end, $step);
-}
-
 function twig_cycle_filter($values, $i)
 {
     if (!is_array($values) && !$values instanceof ArrayAccess) {

lib/Twig/Node/Expression/Binary/Range.php

@@ -18,7 +18,7 @@ class Twig_Node_Expression_Binary_Range extends Twig_Node_Expression_Binary
     public function compile($compiler)
     {
         $compiler
-            ->raw('twig_range_filter(')
+            ->raw('range(')
             ->subcompile($this->getNode('left'))
             ->raw(', ')
             ->subcompile($this->getNode('right'))

test/Twig/Tests/Fixtures/tags/include/only.test

@@ -10,7 +10,7 @@
 --DATA--
 return array('foo' => 'bar')
 --EXPECT--
-foo,_parent,
-_parent,
-foo,foo1,_parent,
-foo1,_parent,
+fn_range,foo,_parent,
+fn_range,_parent,
+fn_range,foo,foo1,_parent,
+fn_range,foo1,_parent,