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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 // basic_filebuf<charT,traits>* open(const filesystem::path& p, ios_base::openmode mode);
15 
16 #include <fstream>
17 #include <filesystem>
18 #include <cassert>
19 #include "test_macros.h"
20 #include "platform_support.h"
21 
22 namespace fs = std::filesystem;
23 
main(int,char **)24 int main(int, char**) {
25 
26   fs::path p = get_temp_file_name();
27   {
28     std::filebuf f;
29     assert(f.open(p, std::ios_base::out) != 0);
30     assert(f.is_open());
31     assert(f.sputn("123", 3) == 3);
32   }
33   {
34     std::filebuf f;
35     assert(f.open(p, std::ios_base::in) != 0);
36     assert(f.is_open());
37     assert(f.sbumpc() == '1');
38     assert(f.sbumpc() == '2');
39     assert(f.sbumpc() == '3');
40   }
41   std::remove(p.c_str());
42   {
43     std::wfilebuf f;
44     assert(f.open(p, std::ios_base::out) != 0);
45     assert(f.is_open());
46     assert(f.sputn(L"123", 3) == 3);
47   }
48   {
49     std::wfilebuf f;
50     assert(f.open(p, std::ios_base::in) != 0);
51     assert(f.is_open());
52     assert(f.sbumpc() == L'1');
53     assert(f.sbumpc() == L'2');
54     assert(f.sbumpc() == L'3');
55   }
56   remove(p.c_str());
57 
58   return 0;
59 }
60