Function from_exception

include/libremidi/system_error2.hpp:1807–1817

template <class E>
E from_exception(std::exception_ptr e) noexcept
{
  return detail::from_exception_impl<E>(
      std::move(e),
      disjunction<
          std::is_convertible<std::exception_ptr, E>,
          detail::is_convertible_from_exception_using_traits<E>,
          sentinel_type
          >{}
      );
}

template <class E>
std::exception_ptr to_exception(E&& e) noexcept