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
11// UNSUPPORTED: availability-filesystem-missing
12
13// FILE_DEPENDENCIES: test.dat
14
15// <fstream>
16
17// template <class charT, class traits = char_traits<charT> >
18// class basic_ifstream
19
20// void open(const filesystem::path& s, ios_base::openmode mode = ios_base::in);
21
22#include <fstream>
23#include <filesystem>
24#include <cassert>
25
26#include "test_macros.h"
27
28int main(int, char**) {
29 {
30 std::ifstream fs;
31 assert(!fs.is_open());
32 char c = 'a';
33 fs >> c;
34 assert(fs.fail());
35 assert(c == 'a');
36 fs.open(std::filesystem::path("test.dat"));
37 assert(fs.is_open());
38 fs >> c;
39 assert(c == 'r');
40 }
41#ifndef TEST_HAS_NO_WIDE_CHARACTERS
42 {
43 std::wifstream fs;
44 assert(!fs.is_open());
45 wchar_t c = L'a';
46 fs >> c;
47 assert(fs.fail());
48 assert(c == L'a');
49 fs.open(std::filesystem::path("test.dat"));
50 assert(fs.is_open());
51 fs >> c;
52 assert(c == L'r');
53 }
54#endif
55
56 return 0;
57}
58

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