[Pyublas] Calling norm_2 on numpy_strided_vector

[Neal Becker]

template<typename out_t, typename in_t>
inline out_t norm_2 (in_t const& in) {
  return ublas::norm_2 (in);
}

[with out_t = double,
 in_t = pyublas::numpy_strided_vector<std::complex<double> >]

Gives:
/usr/local/src/boost.hg/boost/numeric/ublas/vector_expression.hpp:1447: error: 
no matching function for call to 
'boost::numeric::ublas::vector_scalar_unary<boost::numeric::ublas::vector_slice<pyublas::numpy_vector<std::complex<double> 
> >, 
boost::numeric::ublas::vector_norm_2<boost::numeric::ublas::vector_slice<pyublas::numpy_vector<std::complex<double> 
> > > >::evaluate(std::random_access_iterator_tag) const'
/usr/local/src/boost.hg/boost/numeric/ublas/vector_expression.hpp:1453: note: 
candidates are: typename F::result_type 
boost::numeric::ublas::vector_scalar_unary<E, 
F>::evaluate(boost::numeric::ublas::dense_random_access_iterator_tag) const 
[with E = 
boost::numeric::ublas::vector_slice<pyublas::numpy_vector<std::complex<double> 
> >, F = 
boost::numeric::ublas::vector_norm_2<boost::numeric::ublas::vector_slice<pyublas::numpy_vector<std::complex<double> 
> > >]
.... more candidates....

Any ideas?  Can't I use pyublas::numpy_strided_vector<T> anywhere 
ublas::vector could be used?  (I'm assuming the answer is the same if it was 
pyublas::numpy_vector<T>)