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
10
11 // <filesystem>
12
13 // class path
14
15 // template <class charT, class traits>
16 // basic_ostream<charT, traits>&
17 // operator<<(basic_ostream<charT, traits>& os, const path& p);
18 //
19 // template <class charT, class traits>
20 // basic_istream<charT, traits>&
21 // operator>>(basic_istream<charT, traits>& is, path& p)
22 //
23
24 #include "filesystem_include.h"
25 #include <type_traits>
26 #include <sstream>
27 #include <cassert>
28 #include <iostream>
29
30 #include "test_macros.h"
31 #include "test_iterators.h"
32 #include "count_new.h"
33 #include "filesystem_test_helper.h"
34
35 MultiStringType InStr = MKSTR("abcdefg/\"hijklmnop\"/qrstuvwxyz/123456789");
36 MultiStringType OutStr = MKSTR("\"abcdefg/\\\"hijklmnop\\\"/qrstuvwxyz/123456789\"");
37
38
39
40 template <class CharT>
doIOTest()41 void doIOTest() {
42 using namespace fs;
43 using Ptr = const CharT*;
44 using StrStream = std::basic_stringstream<CharT>;
45 const Ptr E = OutStr;
46 const path p((const char*)InStr);
47 StrStream ss;
48 { // test output
49 auto& ret = (ss << p);
50 assert(ss.str() == E);
51 assert(&ret == &ss);
52 }
53 { // test input
54 path p_in;
55 auto& ret = ss >> p_in;
56 assert(p_in.native() == (const char*)InStr);
57 assert(&ret == &ss);
58 }
59 }
60
61 namespace impl {
62 using namespace fs;
63
64 template <class Stream, class Tp, class = decltype(std::declval<Stream&>() << std::declval<Tp&>())>
65 std::true_type is_ostreamable_imp(int);
66
67 template <class Stream, class Tp>
68 std::false_type is_ostreamable_imp(long);
69
70 template <class Stream, class Tp, class = decltype(std::declval<Stream&>() >> std::declval<Tp&>())>
71 std::true_type is_istreamable_imp(int);
72
73 template <class Stream, class Tp>
74 std::false_type is_istreamable_imp(long);
75
76
77 } // namespace impl
78
79 template <class Stream, class Tp>
80 struct is_ostreamable : decltype(impl::is_ostreamable_imp<Stream, Tp>(0)) {};
81 template <class Stream, class Tp>
82 struct is_istreamable : decltype(impl::is_istreamable_imp<Stream, Tp>(0)) {};
83
test_LWG2989()84 void test_LWG2989() {
85 static_assert(!is_ostreamable<decltype(std::cout), std::wstring>::value, "");
86 static_assert(!is_ostreamable<decltype(std::wcout), std::string>::value, "");
87 static_assert(!is_istreamable<decltype(std::cin), std::wstring>::value, "");
88 static_assert(!is_istreamable<decltype(std::wcin), std::string>::value, "");
89 }
90
main(int,char **)91 int main(int, char**) {
92 doIOTest<char>();
93 doIOTest<wchar_t>();
94 //doIOTest<char16_t>();
95 //doIOTest<char32_t>();
96 test_LWG2989();
97
98 return 0;
99 }
100