81     boost::signals2::signal0<int, max_or_default<int>, std::string> s0;  in test_zero_args()  local
82     boost::signals2::connection c2 = s0.connect(i2);  in test_zero_args()
83     boost::signals2::connection c72 = s0.connect("72", i72);  in test_zero_args()
84     boost::signals2::connection c62 = s0.connect("6x", i62);  in test_zero_args()
85     boost::signals2::connection c42 = s0.connect(i42);  in test_zero_args()
86     boost::signals2::connection c37 = s0.connect(&get_37);  in test_zero_args()
88     BOOST_CHECK(s0() == 72);  in test_zero_args()
90     s0.disconnect("72");  in test_zero_args()
91     BOOST_CHECK(s0() == 62);  in test_zero_args()
94     BOOST_CHECK(s0() == 62);  in test_zero_args()
96     s0.disconnect("72"); // Triple-disconect should be safe  in test_zero_args()
97     BOOST_CHECK(s0() == 62);  in test_zero_args()
100     s0.connect("6x", i63);  in test_zero_args()
101     BOOST_CHECK(s0() == 63);  in test_zero_args()
104     s0.disconnect("6x");  in test_zero_args()
105     BOOST_CHECK(s0() == 42);  in test_zero_args()
108     BOOST_CHECK(s0() == 37);  in test_zero_args()
111     BOOST_CHECK(s0() == 2);  in test_zero_args()
114     BOOST_CHECK(s0() == 0);  in test_zero_args()
118     boost::signals2::signal0<int, max_or_default<int> > s0;  in test_zero_args()  local
119     boost::signals2::connection c2 = s0.connect(i2);  in test_zero_args()
120     boost::signals2::connection c72 = s0.connect(i72);  in test_zero_args()
121     boost::signals2::connection c62 = s0.connect(i62);  in test_zero_args()
122     boost::signals2::connection c42 = s0.connect(i42);  in test_zero_args()
124     const boost::signals2::signal0<int, max_or_default<int> >& cs0 = s0;  in test_zero_args()
132     boost::signals2::signal0<int, max_or_default<int> > s0;  in test_zero_args()  local
133     boost::signals2::connection c7 = s0.connect(i7);  in test_zero_args()
134     boost::signals2::connection c10 = s0.connect(i10);  in test_zero_args()
136     BOOST_CHECK(s0() == 10);  in test_zero_args()
137     BOOST_CHECK(s0() == 11);  in test_zero_args()