1.1 --- a/lemon/traits.h	Mon Nov 14 18:35:20 2005 +0000
     1.2 +++ b/lemon/traits.h	Mon Nov 14 18:36:45 2005 +0000
     1.3 @@ -100,8 +100,8 @@
     1.4      typedef typename Map::Key Key;
     1.5      typedef typename Map::Value Value;
     1.6  
     1.7 -    typedef Value ConstReturnValue;
     1.8 -    typedef Value& ReturnValue;
     1.9 +    typedef const Value ConstReturnValue;
    1.10 +    typedef const Value ReturnValue;
    1.11    };
    1.12  
    1.13    template <typename Map>