From b3c4b757e74a63d89cba00417366556029279419 Mon Sep 17 00:00:00 2001
From: Mike Gerwitz <mike@mikegerwitz.com>
Date: Wed, 1 Dec 2010 20:41:54 -0500
Subject: [PATCH] util.canFreeze removed, replaced with util.freeze()

---
 lib/class.js     |  8 ++------
 lib/interface.js |  9 +++------
 lib/util.js      | 20 +++++++++++++-------
 3 files changed, 18 insertions(+), 19 deletions(-)

diff --git a/lib/class.js b/lib/class.js
index c49c000..5cb9c96 100644
--- a/lib/class.js
+++ b/lib/class.js
@@ -22,8 +22,7 @@
  * @package core
  */
 
-var util       = require( './util' ),
-    can_freeze = require( './util' ).canFreeze();
+var util = require( './util' );
 
 
 /**
@@ -132,10 +131,7 @@ var extend = ( function( extending )
 
         // lock down the new class (if supported) to ensure that we can't add
         // members at runtime
-        if ( can_freeze )
-        {
-            Object.freeze( new_class );
-        }
+        util.freeze( new_class );
 
         // we're done with the extension process
         extending = false;
diff --git a/lib/interface.js b/lib/interface.js
index 0119dbc..762cb50 100644
--- a/lib/interface.js
+++ b/lib/interface.js
@@ -22,7 +22,7 @@
  * @package core
  */
 
-var can_freeze = require( './util' ).canFreeze();
+var util = require( './util' );
 
 
 /**
@@ -53,11 +53,8 @@ function extend()
 
     var new_interface = {};
 
-    // freeze the interface (preventing additions) if supported
-    if ( can_freeze )
-    {
-        Object.freeze( new_interface );
-    }
+    // freeze the interface (preventing additions), if supported
+    util.freeze( new_interface );
 
     return new_interface;
 }
diff --git a/lib/util.js b/lib/util.js
index 18eefd1..6008de9 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -34,16 +34,22 @@ var getset = ( Object.prototype.__defineGetter__ === undefined )
 
 
 /**
- * Whether the Object.freeze() method is available
+ * Freezes an object if freezing is supported
  *
- * @return  {boolean}
+ * @param  {Object}  obj  object to freeze
+ *
+ * @return  {Object}  object passed to function
  */
-exports.canFreeze = function()
+exports.freeze = function( obj )
 {
-    return ( Object.seal === undefined )
-        ? false
-        : true
-    ;
+    // if freezing is not supported (ES5), do nothing
+    if ( Object.freeze === undefined )
+    {
+        return;
+    }
+
+    Object.freeze( obj );
+    return obj;
 }