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++98, c++03, c++11, c++14
10 // XFAIL: dylib-has-no-filesystem
11 
12 // <fstream>
13 
14 // template <class charT, class traits = char_traits<charT> >
15 // class basic_ifstream
16 
17 // explicit basic_ifstream(const filesystem::path& s,
18 //     ios_base::openmode mode = ios_base::in);
19 
20 #include <fstream>
21 #include <filesystem>
22 #include <cassert>
23 
24 #include "test_macros.h"
25 
26 namespace fs = std::filesystem;
27 
28 int main(int, char**) {
29   {
30     fs::path p;
31     static_assert(!std::is_convertible<fs::path, std::ifstream>::value,
32                   "ctor should be explicit");
33     static_assert(std::is_constructible<std::ifstream, fs::path const&,
34                                         std::ios_base::openmode>::value,
35                   "");
36   }
37   {
38     std::ifstream fs(fs::path("test.dat"));
39     double x = 0;
40     fs >> x;
41     assert(x == 3.25);
42   }
43   // std::ifstream(const fs::path&, std::ios_base::openmode) is tested in
44   // test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
45   // which creates writable files.
46   {
47     std::wifstream fs(fs::path("test.dat"));
48     double x = 0;
49     fs >> x;
50     assert(x == 3.25);
51   }
52   // std::wifstream(const fs::path&, std::ios_base::openmode) is tested in
53   // test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
54   // which creates writable files.
55 
56   return 0;
57 }
58