From 8030c1292392562af9c9a8ce660635aeb965cc8b Mon Sep 17 00:00:00 2001
From: bzick <aco.best@gmail.com>
Date: Wed, 24 Jul 2013 16:16:20 +0400
Subject: [PATCH] =?UTF-8?q?Add=20{unset=20=E2=80=A6}=20(#29)?=
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---
 src/Fenom.php          |  4 ++++
 src/Fenom/Compiler.php | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/src/Fenom.php b/src/Fenom.php
index 4334b33..c0eb7bf 100644
--- a/src/Fenom.php
+++ b/src/Fenom.php
@@ -228,6 +228,10 @@ class Fenom {
             'type' => self::BLOCK_COMPILER,
             'open' => 'Fenom\Compiler::autoescapeOpen',
             'close' => 'Fenom\Compiler::autoescapeClose'
+        ),
+        'unset' => array(
+            'type' => self::INLINE_COMPILER,
+            'parser' => 'Fenom\Compiler::tagUnset'
         )
     );
 
diff --git a/src/Fenom/Compiler.php b/src/Fenom/Compiler.php
index d125856..30e390a 100644
--- a/src/Fenom/Compiler.php
+++ b/src/Fenom/Compiler.php
@@ -914,4 +914,23 @@ class Compiler {
     public static function autoescapeClose(Tokenizer $tokens, Scope $scope) {
         $scope->tpl->escape = $scope["escape"];
     }
+
+    /**
+     * Unset present variables
+     *
+     * @param Tokenizer $tokens
+     * @param Template $tpl
+     * @return string
+     * @throws InvalidUsageException
+     */
+    public static function tagUnset(Tokenizer $tokens, Template $tpl) {
+        $vars = array();
+        while($tokens->valid()) {
+            $vars[] = $tpl->parseVar($tokens);
+        }
+        if(!$vars) {
+            throw new InvalidUsageException("Unset must accept variable(s)");
+        }
+        return 'unset('.implode(', ', $vars).')';
+    }
 }