Hi,

i'd like to build a heterogenous container based on the boost::variant datastructure. My code looks like this:
// forward-Deklarationen:
class fExport FB_Ordered;
class fExport FB_Dictionary;

// Typedefs
typedef boost::variant<int, std::string> keydicttype;
typedef boost::variant<
        int, std::string, date, ptime,
        boost::recursive_wrapper<FB_Dictionary>,
        boost::recursive_wrapper<FB_Ordered>> valuedicttype;
typedef boost::container::map<keydicttype, valuedicttype> basedict;

C:\dev\boost_1_52_0\boost/checked_delete.hpp(32) : error C2027: use of undefined Type "FB_Ordered"

what i want to do is to create a container fb_dictionary which can hold datatypes that are listed in the valuedicttype and which can accept keyvalues of int and string (see above). fb_ordered is another container defined in a diferent header file so i need the forward declarations. Could anybody please give me a hint in the right direction?  I am using vs2008.