[Boost-users] [parameter] Using named parameter types in return type

In BOOST_PARAMETER_FUNCTION, one argument to specify is the return type of the function. How do I refer to the types deduced for the named parameters in the return type? I am creating a factory function for a class template (similar to std::make_pair) and would like to use named parameters for it. I did not see any obvious way to do this in the documentation. Is there a way? A documented name for the ArgPack? I am using C++0x so it would be OK to have a solution that requires that. -- Jeremiah Willcock