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: no-filesystem
11 
12 // Filesystem is supported on Apple platforms starting with macosx10.15.
13 // UNSUPPORTED: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14}}
14 
15 // <fstream>
16 
17 // plate <class charT, class traits = char_traits<charT> >
18 // class basic_ofstream
19 
20 // void open(const filesystem::path& s, ios_base::openmode mode = ios_base::out);
21 
22 #include <fstream>
23 #include <filesystem>
24 #include <cassert>
25 #include "test_macros.h"
26 #include "platform_support.h"
27 
28 namespace fs = std::filesystem;
29 
main(int,char **)30 int main(int, char**) {
31   fs::path p = get_temp_file_name();
32   {
33     std::ofstream fs;
34     assert(!fs.is_open());
35     char c = 'a';
36     fs << c;
37     assert(fs.fail());
38     fs.open(p);
39     assert(fs.is_open());
40     fs << c;
41   }
42   {
43     std::ifstream fs(p.c_str());
44     char c = 0;
45     fs >> c;
46     assert(c == 'a');
47   }
48   std::remove(p.string().c_str());
49 
50 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
51   {
52     std::wofstream fs;
53     assert(!fs.is_open());
54     wchar_t c = L'a';
55     fs << c;
56     assert(fs.fail());
57     fs.open(p);
58     assert(fs.is_open());
59     fs << c;
60   }
61   {
62     std::wifstream fs(p.c_str());
63     wchar_t c = 0;
64     fs >> c;
65     assert(c == L'a');
66   }
67   std::remove(p.string().c_str());
68 #endif
69 
70   return 0;
71 }
72