21 class G  class
28     G() : alive_(1) {++n_alive;}  in G()  function in G
29     G(const G& g) : alive_(g.alive_) {++n_alive;}  in G()  function in G
30     ~G() {alive_ = 0; --n_alive;}  in ~G()
49 int G::n_alive = 0;
50 bool G::op_run = false;
56         assert(G::n_alive == 0);  in main()
57         assert(!G::op_run);  in main()
58         std::thread t0(G(), 5, 5.5);  in main()
64         assert(G::n_alive == 0);  in main()
65         assert(G::op_run);  in main()