1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <fstream>
11 
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_fstream
14 
15 // explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out);
16 
17 #include <fstream>
18 #include <cassert>
19 #include "platform_support.h"
20 
main()21 int main()
22 {
23     std::string temp = get_temp_file_name();
24     {
25         std::fstream fs(temp,
26                         std::ios_base::in | std::ios_base::out
27                                           | std::ios_base::trunc);
28         double x = 0;
29         fs << 3.25;
30         fs.seekg(0);
31         fs >> x;
32         assert(x == 3.25);
33     }
34     std::remove(temp.c_str());
35     {
36         std::wfstream fs(temp,
37                          std::ios_base::in | std::ios_base::out
38                                            | std::ios_base::trunc);
39         double x = 0;
40         fs << 3.25;
41         fs.seekg(0);
42         fs >> x;
43         assert(x == 3.25);
44     }
45     std::remove(temp.c_str());
46 }
47