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 // FILE_DEPENDENCIES: test.dat
12
13 // <fstream>
14
15 // template <class charT, class traits = char_traits<charT> >
16 // class basic_ifstream
17
18 // explicit basic_ifstream(const filesystem::path& s,
19 // ios_base::openmode mode = ios_base::in);
20
21 #include <fstream>
22 #include <filesystem>
23 #include <cassert>
24
25 #include "test_macros.h"
26
27 namespace fs = std::filesystem;
28
main(int,char **)29 int main(int, char**) {
30 {
31 fs::path p;
32 static_assert(!std::is_convertible<fs::path, std::ifstream>::value,
33 "ctor should be explicit");
34 static_assert(std::is_constructible<std::ifstream, fs::path const&,
35 std::ios_base::openmode>::value,
36 "");
37 }
38 {
39 std::ifstream fs(fs::path("test.dat"));
40 double x = 0;
41 fs >> x;
42 assert(x == 3.25);
43 }
44 // std::ifstream(const fs::path&, std::ios_base::openmode) is tested in
45 // test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
46 // which creates writable files.
47 {
48 std::wifstream fs(fs::path("test.dat"));
49 double x = 0;
50 fs >> x;
51 assert(x == 3.25);
52 }
53 // std::wifstream(const fs::path&, std::ios_base::openmode) is tested in
54 // test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
55 // which creates writable files.
56
57 return 0;
58 }
59