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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 // UNSUPPORTED: c++03, c++11, c++14
10 // UNSUPPORTED: c++filesystem-disabled
11 
12 // <fstream>
13 
14 // plate <class charT, class traits = char_traits<charT> >
15 // class basic_fstream
16 
17 // void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in|ios_base::out);
18 
19 #include <fstream>
20 #include <filesystem>
21 #include <cassert>
22 #include "test_macros.h"
23 #include "platform_support.h"
24 
main(int,char **)25 int main(int, char**) {
26   std::filesystem::path p = get_temp_file_name();
27   {
28     std::fstream stream;
29     assert(!stream.is_open());
30     stream.open(p,
31                 std::ios_base::in | std::ios_base::out | std::ios_base::trunc);
32     assert(stream.is_open());
33     double x = 0;
34     stream << 3.25;
35     stream.seekg(0);
36     stream >> x;
37     assert(x == 3.25);
38   }
39   std::remove(p.c_str());
40   {
41     std::wfstream stream;
42     assert(!stream.is_open());
43     stream.open(p,
44                 std::ios_base::in | std::ios_base::out | std::ios_base::trunc);
45     assert(stream.is_open());
46     double x = 0;
47     stream << 3.25;
48     stream.seekg(0);
49     stream >> x;
50     assert(x == 3.25);
51   }
52   std::remove(p.c_str());
53 
54   return 0;
55 }
56