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_fstream
13 
14 // void open(const wchar_t* s, ios_base::openmode mode = ios_base::in|ios_base::out);
15 
16 // This extension is only provided on Windows.
17 // REQUIRES: windows
18 // UNSUPPORTED: no-wide-characters
19 
20 // TODO: This should not be necessary
21 // ADDITIONAL_COMPILE_FLAGS:-D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT
22 
23 #include <fstream>
24 #include <cassert>
25 #include "test_macros.h"
26 #include "wide_temp_file.h"
27 
main(int,char **)28 int main(int, char**) {
29     std::wstring temp = get_wide_temp_file_name();
30     {
31         std::fstream fs;
32         assert(!fs.is_open());
33         fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out
34                                         | std::ios_base::trunc);
35         assert(fs.is_open());
36         double x = 0;
37         fs << 3.25;
38         fs.seekg(0);
39         fs >> x;
40         assert(x == 3.25);
41     }
42     _wremove(temp.c_str());
43     {
44         std::wfstream fs;
45         assert(!fs.is_open());
46         fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out
47                                         | std::ios_base::trunc);
48         assert(fs.is_open());
49         double x = 0;
50         fs << 3.25;
51         fs.seekg(0);
52         fs >> x;
53         assert(x == 3.25);
54     }
55     _wremove(temp.c_str());
56 
57     return 0;
58 }
59