Wątek w klasie

class Client
{
private:
    std::string name;
    sf::TcpSocket me;
public:
    Client( const std::string & name );
    ~Client();
    void wysylanie( Client client );
    sf::Socket::Status connect( const sf::IpAddress & IP, unsigned short port );
    sf::Socket::Status send( PacketType type, const std::string & msg );
    sf::Socket::Status receive( std::string & msg );

void Client::wysylanie( Client client )
{
    while( 1 )
    {
        string s;
        getline( std::cin, s );
        client.send( GENERAL_MSG, s );
    }
}

Client client( name );
Thread thread( & Client::wysylanie, client );
thread.launch();

std::thread t( & Client::wysylanie, Client( name ) );