diff --git a/docs/en/tags/do.md b/docs/en/tags/do.md
new file mode 100644
index 0000000..c10f273
--- /dev/null
+++ b/docs/en/tags/do.md
@@ -0,0 +1,9 @@
+Tag {do}
+========
+
+Evaluates any expression and doesn't print anything
+
+```smarty
+{do $count++}
+{do $object->method()}
+```
\ No newline at end of file
diff --git a/docs/ru/tags/do.md b/docs/ru/tags/do.md
new file mode 100644
index 0000000..4e65853
--- /dev/null
+++ b/docs/ru/tags/do.md
@@ -0,0 +1,9 @@
+Тег {do}
+========
+
+Выполнить произвольноые выражение без вывода результата на экран
+
+```smarty
+{do $count++}
+{do $object->method()}
+```
\ No newline at end of file
diff --git a/sandbox/fenom.php b/sandbox/fenom.php
index 1fe4b8a..3f3c9fd 100644
--- a/sandbox/fenom.php
+++ b/sandbox/fenom.php
@@ -7,10 +7,7 @@ require_once __DIR__.'/../tests/tools.php';
 
 $fenom = Fenom::factory(__DIR__.'/templates', __DIR__.'/../tests/resources/compile');
 $fenom->setOptions(Fenom::AUTO_RELOAD);
-$fenom->addModifier('firstimg', function ($img) {
-    return $img;
-});
-var_dump($fenom->compileCode('{foreach $list as $k => $e last=$l first=$f index=$i} {if $f}first{/if} {$i}: {$k} => {$e}, {if $l}last{/if} {/foreach}')->getTemplateCode());
+var_dump($fenom->compileCode('{do $object->method()}')->getTemplateCode());
 //var_dump($fenom->compile("bug158/main.tpl", [])->getTemplateCode());
 //var_dump($fenom->display("bug158/main.tpl", []));
 // $fenom->getTemplate("problem.tpl");
\ No newline at end of file
diff --git a/src/Fenom.php b/src/Fenom.php
index f7e5862..f6b3432 100644
--- a/src/Fenom.php
+++ b/src/Fenom.php
@@ -272,6 +272,10 @@ class Fenom
             'open'  => 'Fenom\Compiler::setOpen',
             'close' => 'Fenom\Compiler::setClose'
         ),
+        'do'     => array( // {do ...}
+            'type'   => self::INLINE_COMPILER,
+            'parser' => 'Fenom\Compiler::tagDo'
+        ),
         'block'      => array( // {block ...} {parent} {/block}
             'type'       => self::BLOCK_COMPILER,
             'open'       => 'Fenom\Compiler::tagBlockOpen',
diff --git a/src/Fenom/Compiler.php b/src/Fenom/Compiler.php
index d057f68..a598122 100644
--- a/src/Fenom/Compiler.php
+++ b/src/Fenom/Compiler.php
@@ -813,6 +813,11 @@ class Compiler
         return $scope["name"] . '=' . $scope["value"] . ';';
     }
 
+    public static function tagDo($tokens, Tag $scope)
+    {
+        return $scope->tpl->parseExpr($tokens).';';
+    }
+
 
     /**
      * @param Tokenizer $tokens
diff --git a/src/Fenom/RangeIterator.php b/src/Fenom/RangeIterator.php
index 8ca0981..2d5cfb1 100644
--- a/src/Fenom/RangeIterator.php
+++ b/src/Fenom/RangeIterator.php
@@ -23,7 +23,8 @@ class RangeIterator implements \Iterator, \Countable
      * @param int $step
      * @return $this
      */
-    public function setStep($step) {
+    public function setStep($step)
+    {
         if($step > 0) {
             $this->current = min($this->min, $this->max);
         } elseif($step < 0) {
diff --git a/tests/cases/Fenom/TemplateTest.php b/tests/cases/Fenom/TemplateTest.php
index 7d3cef4..31247d3 100644
--- a/tests/cases/Fenom/TemplateTest.php
+++ b/tests/cases/Fenom/TemplateTest.php
@@ -111,6 +111,18 @@ class TemplateTest extends TestCase
         );
     }
 
+    public static function providerDo() {
+        $vars = array(
+            "c" => 4,
+            "world" => new Helper('world')
+        );
+        return array(
+            array('{do "nope"}', $vars, ""),
+            array('{do $c++} -> {$c}', $vars, "-> 5"),
+            array('{do $world->chunk(1)}', $vars, ""),
+        );
+    }
+
 
     public static function providerVarsInvalid()
     {
@@ -1154,6 +1166,15 @@ class TemplateTest extends TestCase
         $this->exec($code, $vars, $result);
     }
 
+    /**
+     * @dataProvider providerDo
+     */
+    public function testDo($code, $vars, $result)
+    {
+        $this->exec($code, $vars, $result);
+    }
+
+
     /**
      * @dataProvider providerVarsInvalid
      */
@@ -1587,6 +1608,8 @@ class TemplateTest extends TestCase
     {
         return array(
             array('{set $a=1..3}', "1,2,3,"),
+//            array('{set $a=0..0}', ""),
+//            array('{set $a=1..1}', ""),
 //            array('{set $a="a".."f"}', "a,b,c,d,e,f,"),
 //            array('{set $a=1.."f"}', "1,0,"),
 //            array('{set $a="a"..2}', "0,1,2,"),
@@ -1618,7 +1641,6 @@ class TemplateTest extends TestCase
     /**
      * @dataProvider providerRange
      * @group testRange
-     * @group dev
      * @param string $code
      * @param string $result
      */