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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 string& s, ios_base::openmode mode = ios_base::out);
15 
16 #include <fstream>
17 #include <cassert>
18 #include "test_macros.h"
19 #include "platform_support.h"
20 
main(int,char **)21 int main(int, char**)
22 {
23     std::string temp = get_temp_file_name();
24     {
25         std::ofstream fs;
26         assert(!fs.is_open());
27         char c = 'a';
28         fs << c;
29         assert(fs.fail());
30         fs.open(temp);
31         assert(fs.is_open());
32         fs << c;
33     }
34     {
35         std::ifstream fs(temp.c_str());
36         char c = 0;
37         fs >> c;
38         assert(c == 'a');
39     }
40     std::remove(temp.c_str());
41     {
42         std::wofstream fs;
43         assert(!fs.is_open());
44         wchar_t c = L'a';
45         fs << c;
46         assert(fs.fail());
47         fs.open(temp);
48         assert(fs.is_open());
49         fs << c;
50     }
51     {
52         std::wifstream fs(temp.c_str());
53         wchar_t c = 0;
54         fs >> c;
55         assert(c == L'a');
56     }
57     std::remove(temp.c_str());
58 
59   return 0;
60 }
61