Remove reliance on Mac OS X 10.5 features.

1 files changed, 11 insertions, 4 deletions

diff --git a/MLKEnvironment.m b/MLKEnvironment.m
index 7119bac..c557f79 100644
--- a/MLKEnvironment.m
+++ b/MLKEnvironment.m
@@ -58,12 +58,19 @@
   return _parent;
 }
 
+-(NSArray *) bindingArray
+{
+  NSMutableArray *array = [NSMutableArray arrayWithArray:[_bindings allKeys]];
+
+  if (_parent)
+    [array addObjectsFromArray:[_parent bindingArray]];
+
+  return array;
+}
+
 -(NSSet *) bindings
 {
-  NSSet *set = [NSSet setWithArray:[_bindings allKeys]];
-  return (_parent
-          ? (id)[set setByAddingObjectsFromSet:[_parent bindings]]
-          : (id)set);
+  return [NSSet setWithArray:[self bindingArray]];
 }
 
 -(void) setValue:(id)value forSymbol:(MLKSymbol *)symbol;