25         std::ostringstream ss;  in main()  local
26         swap(ss, ss0);  in main()
27         assert(ss.rdbuf() != 0);  in main()
28         assert(ss.good());  in main()
29         assert(ss.str() == " 123 456");  in main()
31         ss << i << ' ' << 567;  in main()
32         assert(ss.str() == "234 5676");  in main()
39         std::wostringstream ss;  in main()  local
40         swap(ss, ss0);  in main()
41         assert(ss.rdbuf() != 0);  in main()
42         assert(ss.good());  in main()
43         assert(ss.str() == L" 123 456");  in main()
45         ss << i << ' ' << 567;  in main()
46         assert(ss.str() == L"234 5676");  in main()