how to typdef an enum of one namespace inside another and use ist c++ -

possible duplicate:
how import enum different namespace in c++?

how can following enum namespace problem been solved?

namespace {     typedef enum abar { a, b };      void foo( abar xx ) {} }  namespace b {     typedef enum a::abar bbar;          void foo( bbar xx ) { a::foo( xx ); }  }  int main() {     b::foo( b::a ); // 'a' : not member of 'b'                     // 'a' : undeclared identifier } 

while typedef type, don't import symbols defined in namespace. while can write:

int main() {     b::bbar enumvariable=a::a; } 

you cannot access b::a symbol not exist.

a partial walkaround and, in opinion, way make code more clean, although bit more longer write, pack every enum own struct, e.g.:

struct abar {     enum type {a, b}; };  typedef abar bbar;  int main() {     abar::type var=abar::a;     bbar::type var2=bbar::a; } 

you able to, if still need it, pack abar namespace , typedef in namespace too.