/home/users/nchaimov/hpx/hpx-inst/include/hpx/util/unwrapped.hpp:408:13: error: ‘typename boost::disable_if_c<((hpx::traits::is_future<typename hpx::util::decay<T>::type>::value || hpx::traits::is_future_range<typename hpx::util::decay<T>::type>::value) || hpx::traits::is_future_tuple<typename hpx::util::decay<T>::type>::value), hpx::util::detail::unwrapped_impl<typename hpx::util::decay<T>::type> >::type hpx::util::unwrapped(F&&) [with F = hpx::parallel::v1::detail::transform_reduce<T>::parallel(const ExPolicy&, FwdIter, FwdIter, T_&&, Reduce&&, Convert&&) [with ExPolicy = hpx::parallel::v1::parallel_task_execution_policy; FwdIter = boost::counting_iterator<int>; T_ = std::plus<double>; Reduce = ComputeDotProduct_async(local_int_t, const Vector&, const Vector&, double&)::__lambda11; Convert = double; T = std::plus<double>; typename hpx::parallel::v1::detail::algorithm_result<ExPolicy, T>::type = hpx::lcos::future<std::plus<double> >]::__lambda6; typename boost::disable_if_c<((hpx::traits::is_future<typename hpx::util::decay<T>::type>::value || hpx::traits::is_future_range<typename hpx::util::decay<T>::type>::value) || hpx::traits::is_future_tuple<typename hpx::util::decay<T>::type>::value), hpx::util::detail::unwrapped_impl<typename hpx::util::decay<T>::type> >::type = hpx::util::detail::unwrapped_impl<hpx::parallel::v1::detail::transform_reduce<T>::parallel(const ExPolicy&, FwdIter, FwdIter, T_&&, Reduce&&, Convert&&) [with ExPolicy = hpx::parallel::v1::parallel_task_execution_policy; FwdIter = boost::counting_iterator<int>; T_ = std::plus<double>; Reduce = ComputeDotProduct_async(local_int_t, const Vector&, const Vector&, double&)::__lambda11; Convert = double; T = std::plus<double>; typename hpx::parallel::v1::detail::algorithm_result<ExPolicy, T>::type = hpx::lcos::future<std::plus<double> >]::__lambda6>]’, declared using local type ‘hpx::parallel::v1::detail::transform_reduce<T>::parallel(const ExPolicy&, FwdIter, FwdIter, T_&&, Reduce&&, Convert&&) [with ExPolicy = hpx::parallel::v1::parallel_task_execution_policy; FwdIter = boost::counting_iterator<int>; T_ = std::plus<double>; Reduce = ComputeDotProduct_async(local_int_t, const Vector&, const Vector&, double&)::__lambda11; Convert = double; T = std::plus<double>; typename hpx::parallel::v1::detail::algorithm_result<ExPolicy, T>::type = hpx::lcos::future<std::plus<double> >]::__lambda6’, is used but never defined [-fpermissive]
>::type unwrapped(F && f)