multivector.h

template < class T, int n > struct mvector_tool{
  typedef vector< typename mvector_tool<T,n-1>::type > type;
  static type gen_vector( std::array<unsigned int, n> index, T initvalue ){
    std::array<unsigned int,n-1> index_next;
    std::copy_n( index.begin()+1, n-1, index_next.begin() );
    return type( index.front(), mvector_tool<T,n-1>::gen_vector( index_next, initvalue ));
  }
};

template < class T > struct mvector_tool<T,0>{
  typedef T type;
  static type gen_vector( std::array<unsigned int,0> index, T &initvalue ){
    return initvalue;
  }
};

template <class T, int n> using mvec = typename mvector_tool<T,n>::type;

struct mvector_tool_g {
  template < class T > static void PrintVector( T v ){
    std::cout<< v << std::endl;;
  }
  template < class T > static void PrintVector( vector<T> &v ){
    for ( auto i : v ) { PrintVector( i );}
  }
};

void test_multivector(){
    mvec<int, 5> mv1 = mvector_tool<int, 5>::gen_vector( {2, 3, 4, 5, 6}, 1 );
    mvector_tool_g::PrintVector( mv1 );
}