On Thu, Nov 8, 2012 at 11:44 PM, <Georg.Kellerer@lfu.bayern.de> wrote:

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;

What's fExport?

// 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.

A full, expected-to-compile example is always helpful. But the errors I'm getting with the above typedefs seem more related to the lack of this fExport keyword you're using. If I remove the fExport stuff then all the typedefs compile fine, and I don't get the undefined type error until I try to instantiate basedict (obviously; FB_Ordered and FB_Dictionary need to be defined by then). - Jeff

AMDG On 11/08/2012 11:44 PM, Georg.Kellerer@lfu.bayern.de wrote:

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.

FP_Ordered has to be complete at the point where the destructor of variant is instantiated. The same thing goes for FB_Dictionary. In Christ, Steven Watanabe