When you try to create an iterator (in this case a vector) to a templatized 
container you will get a parse error, although I have no problem with creating 
a templatized container itself.  const_iterator has the same problem. The 
following demonstrates:

class<typename Tchar_type = char>
class Object
   {
   std::vector<Tchar_type> m_charvector; //this works
   std::vector<Tchar_type>::iterator m_iter; //this gives a parse error, but...
   std::vector<char>::iterator m_iter2; //this is OK
   };