1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <fstream>
10 
11 // template <class charT, class traits = char_traits<charT> >
12 // class basic_ofstream
13 
14 // void open(const char* s, ios_base::openmode mode = ios_base::out);
15 
16 #include <fstream>
17 #include <cassert>
18 #include "platform_support.h"
19 
20 int main(int, char**)
21 {
22     std::string temp = get_temp_file_name();
23     {
24         std::ofstream fs;
25         assert(!fs.is_open());
26         char c = 'a';
27         fs << c;
28         assert(fs.fail());
29         fs.open(temp.c_str());
30         assert(fs.is_open());
31         fs << c;
32     }
33     {
34         std::ifstream fs(temp.c_str());
35         char c = 0;
36         fs >> c;
37         assert(c == 'a');
38     }
39     std::remove(temp.c_str());
40     {
41         std::wofstream fs;
42         assert(!fs.is_open());
43         wchar_t c = L'a';
44         fs << c;
45         assert(fs.fail());
46         fs.open(temp.c_str());
47         assert(fs.is_open());
48         fs << c;
49     }
50     {
51         std::wifstream fs(temp.c_str());
52         wchar_t c = 0;
53         fs >> c;
54         assert(c == L'a');
55     }
56     std::remove(temp.c_str());
57 
58   return 0;
59 }
60