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// <fstream>
10
11// template <class charT, class traits = char_traits<charT> >
12// class basic_ofstream
13
14// void open(const string& s, ios_base::openmode mode = ios_base::out);
15
16#include <fstream>
17#include <cassert>
18#include "test_macros.h"
19#include "platform_support.h"
20
21int main(int, char**)
22{
23 std::string temp = get_temp_file_name();
24 {
25 std::ofstream fs;
26 assert(!fs.is_open());
27 char c = 'a';
28 fs << c;
29 assert(fs.fail());
30 fs.open(s: temp);
31 assert(fs.is_open());
32 fs << c;
33 }
34 {
35 std::ifstream fs(temp.c_str());
36 char c = 0;
37 fs >> c;
38 assert(c == 'a');
39 }
40 std::remove(filename: temp.c_str());
41
42#ifndef TEST_HAS_NO_WIDE_CHARACTERS
43 {
44 std::wofstream fs;
45 assert(!fs.is_open());
46 wchar_t c = L'a';
47 fs << c;
48 assert(fs.fail());
49 fs.open(s: temp);
50 assert(fs.is_open());
51 fs << c;
52 }
53 {
54 std::wifstream fs(temp.c_str());
55 wchar_t c = 0;
56 fs >> c;
57 assert(c == L'a');
58 }
59 std::remove(filename: temp.c_str());
60#endif
61
62 return 0;
63}
64

source code of libcxx/test/std/input.output/file.streams/fstreams/ofstream.members/open_string.pass.cpp