[Boost-users] mpl and mpl::vector_c

I'm having a hard time trying to understand meta-programming. I have a template class template<class CDB> struct MyClass { template typedef MyClass > > Or; template friend Or myOperation(MyClass<CDB0> &_r0, MyClass<CDB1> &_r1); }; The template argument will be of type mpl::vector_c All the vectors will be of equal length. Now the function myOperation is supposed to iterate over both the vectors at the same time and do different operations depending on the value of both vectors at this position. I could generate a mpl::vector, ..> but I really don't know how. Any help would be appreciated. Peter