Method stream

3rd/asio-1.24.0/include/asio/ssl/stream.hpp:105–109

   */
  template <typename Arg>
  stream(Arg&& arg, context& ctx)
    : next_layer_(ASIO_MOVE_CAST(Arg)(arg)),
      core_(ctx.native_handle(), next_layer_.lowest_layer().get_executor())
  {
  }

  /// Construct a stream from an existing native implementation.
  /**