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 // XFAIL: availability-filesystem-missing
10
11 // Make sure the various containers' iterators are not broken by the use of `std::rel_ops`.
12
13 #include <utility> // for std::rel_ops
14
15 #include <array>
16 #include <deque>
17 #include <filesystem>
18 #include <forward_list>
19 #include <list>
20 #include <map>
21 #include <set>
22 #include <string>
23 #include <unordered_map>
24 #include <unordered_set>
25 #include <vector>
26
27 #include "test_macros.h"
28
29 #if TEST_STD_VER >= 17
30 #include <string_view>
31 #endif
32
33 #if TEST_STD_VER >= 20
34 #include <span>
35 #endif
36
37 using namespace std::rel_ops;
38
39 template<class It, class ConstIt>
test_eq(It it,ConstIt cit)40 void test_eq(It it, ConstIt cit) {
41 (void)(it == it);
42 (void)(it != it);
43 (void)(it == cit);
44 (void)(it != cit);
45 (void)(cit == it);
46 (void)(cit != it);
47 (void)(cit == cit);
48 (void)(cit != cit);
49 }
50
51 template<class It, class ConstIt>
test_lt(It it,ConstIt cit)52 void test_lt(It it, ConstIt cit) {
53 (void)(it < it);
54 (void)(it <= it);
55 (void)(it > it);
56 (void)(it >= it);
57 (void)(it < cit);
58 (void)(it <= cit);
59 (void)(it > cit);
60 (void)(it >= cit);
61 (void)(cit < it);
62 (void)(cit <= it);
63 (void)(cit > it);
64 (void)(cit >= it);
65 (void)(cit < cit);
66 (void)(cit <= cit);
67 (void)(cit > cit);
68 (void)(cit >= cit);
69
70 // Test subtraction too, even though std::rel_ops shouldn't affect it.
71
72 (void)(it - it);
73 (void)(it - cit);
74 (void)(cit - it);
75 (void)(cit - cit);
76 }
77
78 template<class Container>
test_forward()79 void test_forward() {
80 // There is no need to distinguish "forward" from "bidirectional."
81 // libc++ already can't handle `c.rbegin() >= c.rbegin()` in the
82 // presence of std::rel_ops, and neither can Microsoft nor libstdc++.
83
84 Container c;
85 typename Container::iterator it = c.begin();
86 typename Container::const_iterator cit = c.begin();
87 test_eq(it, cit);
88 }
89
90 template<class Container>
test_random_access()91 void test_random_access() {
92 Container c;
93 typename Container::iterator it = c.begin();
94 typename Container::const_iterator cit = c.begin();
95 test_eq(it, cit);
96 test_lt(it, cit);
97 }
98
99 template void test_random_access<std::array<int, 10> >();
100 template void test_random_access<std::deque<int> >();
101 template void test_forward<std::forward_list<int> >();
102 template void test_forward<std::list<int> >();
103 template void test_forward<std::map<int, int> >();
104 template void test_forward<std::multimap<int, int> >();
105 template void test_forward<std::multiset<int> >();
106 template void test_forward<std::set<int> >();
107 template void test_random_access<std::string>();
108 template void test_forward<std::unordered_map<int, int> >();
109 template void test_forward<std::unordered_multimap<int, int> >();
110 template void test_forward<std::unordered_multiset<int> >();
111 template void test_forward<std::unordered_set<int> >();
112 template void test_random_access<std::vector<int> >();
113
114 #if TEST_STD_VER >= 17
test_directory_iterators()115 void test_directory_iterators() {
116 #ifndef TEST_HAS_NO_FILESYSTEM
117 std::filesystem::directory_iterator it;
118 test_eq(it, it);
119
120 std::filesystem::recursive_directory_iterator rdit;
121 test_eq(rdit, rdit);
122 #endif
123 }
124
125 template void test_forward<std::filesystem::path>();
126 #endif
127
128 #if TEST_STD_VER >= 17
129 template void test_random_access<std::string_view>();
130 #endif
131
132 #if TEST_STD_VER >= 20
test_span()133 void test_span() {
134 std::span<int> c;
135 std::span<int>::iterator it = c.begin(); // span has no const_iterator
136 test_eq(it, it);
137 test_lt(it, it);
138 }
139 #endif
140