util.canFreeze removed, replaced with util.freeze()

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;

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;
 }

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;
 }