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 // UNSUPPORTED: c++98, c++03, c++11, c++14
10 
11 // <fstream>
12 
13 // plate <class charT, class traits = char_traits<charT> >
14 // class basic_fstream
15 
16 // explicit basic_fstream(const filesystem::path& s,
17 //     ios_base::openmode mode = ios_base::in|ios_base::out);
18 
19 #include <fstream>
20 #include <filesystem>
21 #include <cassert>
22 #include "platform_support.h"
23 
24 namespace fs = std::filesystem;
25 
26 int main(int, char**) {
27   fs::path p = get_temp_file_name();
28   {
29     std::fstream fs(p, std::ios_base::in | std::ios_base::out |
30                            std::ios_base::trunc);
31     double x = 0;
32     fs << 3.25;
33     fs.seekg(0);
34     fs >> x;
35     assert(x == 3.25);
36   }
37   std::remove(p.c_str());
38   {
39     std::wfstream fs(p, std::ios_base::in | std::ios_base::out |
40                             std::ios_base::trunc);
41     double x = 0;
42     fs << 3.25;
43     fs.seekg(0);
44     fs >> x;
45     assert(x == 3.25);
46   }
47   std::remove(p.c_str());
48 
49   return 0;
50 }
51