Problems with mpl::push_back

#include <boost/mpl/list.hpp> #include <boost/mpl/push_back.hpp> int main() { typedef boost::mpl::list<> type0; typedef boost::mpl::push_back<type0,int>::type type1; typedef boost::mpl::push_back<type1,char>::type type2; return 0; } This fails in MSVC 6.5 and gcc 3.2. The error seems to indicate that push_back does not provide a type named 'type'. If I replace push_back with push_front, eveything works wonderfully. Am I doing any gross error, is the documentation wrong, ideas, clues? Thanx in advance. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo