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 // UNSUPPORTED: c++98, c++03, c++11, c++14
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 "platform_support.h"
20
21 namespace fs = std::filesystem;
22
main()23 int main() {
24
25 fs::path p = get_temp_file_name();
26 {
27 std::filebuf f;
28 assert(f.open(p, std::ios_base::out) != 0);
29 assert(f.is_open());
30 assert(f.sputn("123", 3) == 3);
31 }
32 {
33 std::filebuf f;
34 assert(f.open(p, std::ios_base::in) != 0);
35 assert(f.is_open());
36 assert(f.sbumpc() == '1');
37 assert(f.sbumpc() == '2');
38 assert(f.sbumpc() == '3');
39 }
40 std::remove(p.c_str());
41 {
42 std::wfilebuf f;
43 assert(f.open(p, std::ios_base::out) != 0);
44 assert(f.is_open());
45 assert(f.sputn(L"123", 3) == 3);
46 }
47 {
48 std::wfilebuf f;
49 assert(f.open(p, std::ios_base::in) != 0);
50 assert(f.is_open());
51 assert(f.sbumpc() == L'1');
52 assert(f.sbumpc() == L'2');
53 assert(f.sbumpc() == L'3');
54 }
55 remove(p.c_str());
56 }
57