diff options
Diffstat (limited to 'MLKEnvironment.m')
| -rw-r--r-- | MLKEnvironment.m | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/MLKEnvironment.m b/MLKEnvironment.m index 8488dd2..b2a3a81 100644 --- a/MLKEnvironment.m +++ b/MLKEnvironment.m @@ -69,6 +69,7 @@ static id UNBOUND; -(void) setBinding:(MLKSymbol *)symbol to:(id)value inEnvironment:(MLKEnvironment *)env { + value = value ? value : (id) [NSNull null]; if ([_bindings objectForKey:symbol]) [_bindings setObject:value forKey:symbol]; else @@ -117,6 +118,7 @@ static id UNBOUND; -(void) addValue:(id)value forBinding:(MLKSymbol *)symbol; { + value = value ? value : (id) [NSNull null]; [_bindings setObject:value forKey:symbol]; } |