Done #80

src/Fenom.php

@@ -282,6 +282,10 @@ class Fenom
             'type'  => self::BLOCK_COMPILER,
             'open'  => 'Fenom\Compiler::ignoreOpen',
             'close' => 'Fenom\Compiler::nope'
+        ),
+        'unset'  => array(
+            'type'   => self::INLINE_COMPILER,
+            'parser' => 'Fenom\Compiler::tagUnset'
         )
     );
 

src/Fenom/Compiler.php

@@ -1007,4 +1007,19 @@ class Compiler
     {
         $tag->tpl->ignore('ignore');
     }
+
+    /**
+     * Tag {unset ...}
+     * @param Tokenizer $tokens
+     * @param Tag $tag
+     * @return string
+     */
+    public static function tagUnset(Tokenizer $tokens, Tag $tag)
+    {
+        $unset = [];
+        while($tokens->valid()) {
+            $unset[] = $tag->tpl->parseVariable($tokens);
+        }
+        return 'unset('.implode(", ", $unset).')';
+    }
 }

tests/cases/Fenom/TemplateTest.php

@@ -596,6 +596,14 @@ class TemplateTest extends TestCase
         );
     }
 
+    public static function providerUnset() {
+        return array(
+            array('{var $a = 5} {unset $a} {if $a is not set}not set{/if}', 'not set'),
+            array('{var $a = ["b" => 5, "c" => 6]} {unset $a.b} {if $a.b is not set}not set{/if} but c is {$a.c}', 'not set but c is 6'),
+            array('{var $a = ["b" => 5, "c" => 6]} {unset $a.b $a.c} {if $a.b is not set}not set{/if} {if $a.c is not set}not set{/if}', 'not set not set'),
+        );
+    }
+
     public static function providerTernary()
     {
         $a = array(
@@ -1296,12 +1304,12 @@ class TemplateTest extends TestCase
     /**
      * @group sb
      */
-    public function testSandbox()
+    public function _testSandbox()
     {
         try {
             var_dump(
                 $this->fenom->compileCode(
-                    '{foreach $fff as $k}{/foreach}'
+                    '{unset $a $a.c $b}'
                 )->getBody()
             );
         } catch (\Exception $e) {
@@ -1455,6 +1463,15 @@ class TemplateTest extends TestCase
         $this->exec($code.'{if $arr === $vars}equal{/if}', $v, 'equal');
     }
 
+    /**
+     * @dataProvider providerUnset
+     * @group unset
+     */
+    public function testUnset($code, $result)
+    {
+        $this->exec($code, $this->getVars(), $result);
+    }
+
     /**
      * @dataProvider providerCreateVarInvalid
      */