25         std::ofstream fs;  in main()  local
26         assert(!fs.is_open());  in main()
28         fs << c;  in main()
29         assert(fs.fail());  in main()
30         fs.open(temp);  in main()
31         assert(fs.is_open());  in main()
32         fs << c;  in main()
35         std::ifstream fs(temp.c_str());  in main()  local
37         fs >> c;  in main()
44         std::wofstream fs;  in main()  local
45         assert(!fs.is_open());  in main()
47         fs << c;  in main()
48         assert(fs.fail());  in main()
49         fs.open(temp);  in main()
50         assert(fs.is_open());  in main()
51         fs << c;  in main()
54         std::wifstream fs(temp.c_str());  in main()  local
56         fs >> c;  in main()