Boost C++ Libraries

SocketStream should meet the Stream requirements. Additionally, it should have a lowest_layer_type member type, and a lowest_layer member function, returning a lowest_layer_type&, following Asio's layered stream model. Additionally, lowest_layer_type should inherit from an instantiation of boost::asio::basic_stream_socket.

The types boost::asio::basic_stream_socket<Protocol, Executor> and boost::asio::ssl::stream<boost::asio::basic_stream_socket<Protocol, Executor>> meet these requirements.