23         std::ostringstream ss(" 123 456");  in main()  local
24         assert(ss.rdbuf() != 0);  in main()
25         assert(ss.good());  in main()
26         assert(ss.str() == " 123 456");  in main()
28         ss << i;  in main()
29         assert(ss.str() == "0123 456");  in main()
30         ss << 456;  in main()
31         assert(ss.str() == "0456 456");  in main()
32         ss.str(" 789");  in main()
33         assert(ss.str() == " 789");  in main()
34         ss << "abc";  in main()
35         assert(ss.str() == "abc9");  in main()
38         std::wostringstream ss(L" 123 456");  in main()  local
39         assert(ss.rdbuf() != 0);  in main()
40         assert(ss.good());  in main()
41         assert(ss.str() == L" 123 456");  in main()
43         ss << i;  in main()
44         assert(ss.str() == L"0123 456");  in main()
45         ss << 456;  in main()
46         assert(ss.str() == L"0456 456");  in main()
47         ss.str(L" 789");  in main()
48         assert(ss.str() == L" 789");  in main()
49         ss << L"abc";  in main()
50         assert(ss.str() == L"abc9");  in main()