Method ~basic_eventually

single_header/libfork.hpp:3567–3596

* @brief Destroy the eventually object and the contained object. */

   * @brief Destroy the eventually object and the contained object.
   */
  ~basic_eventually() noexcept {
    if constexpr (implicit_state) {
      if constexpr (Exception) {
        std::destroy_at(std::addressof(m_exception));
      } else {
        // T* is trivially destructible.
      }
    } else {
      switch (m_flag) {
        case state::empty:
          return;
        case state::value:
          if constexpr (!is_void) {
            std::destroy_at(std::addressof(m_value));
            return;
          } else {
            lf::impl::unreachable();
          }
        case state::exception:
          if constexpr (Exception) {
            std::destroy_at(std::addressof(m_exception));
            return;
          } else {
            lf::impl::unreachable();
          }
        default:
          lf::impl::unreachable();
      }
    }
  }
  // ----------------------- Check state ----------------------- //

  /**