template<typename flt_t>
template<typename gamma_t, typename gamma2_t, typename alpha_t, typename
         beta_t, typename tail_extrinsic_t, typename rec_tail_t>

void turbo_dec_1_15<flt_t>::compute_tail(gamma_t const&    gamma,
                                         gamma2_t const&   gamma2,
                                         alpha_t const&    alpha,
                                         beta_t const&     beta,
                                         tail_extrinsic_t& tail_extrinsic,
                                         rec_tail_t const& rec_tail)
{
}