C++11 Mapping for Data Members in Local Types

Data members on local Slice types (classes, exceptions and structs) are mapped to C++ just like the data members of the corresponding non local Slice construct.

A local Slice type can have a data member of type local interface or class, which is mapped to a C++ data member of type std::shared_ptr<mapped C++ class>. A LocalObject data member is mapped to a C++ data member of the same name with type std::shared_ptr<void>.