1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: gcc-10
// template<class I2, sentinel_for<I> S2>
// requires sentinel_for<S, I2>
// friend bool operator==(
// const common_iterator& x, const common_iterator<I2, S2>& y);
// template<class I2, sentinel_for<I> S2>
// requires sentinel_for<S, I2> && equality_comparable_with<I, I2>
// friend bool operator==(
// const common_iterator& x, const common_iterator<I2, S2>& y);
#include <iterator>
#include <cassert>
#include "test_macros.h"
#include "types.h"
void test() {
int buffer[8] = {1, 2, 3, 4, 5, 6, 7, 8};
{
auto iter1 = simple_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
const auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
const auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
assert(commonIter1 != commonSent1);
assert(commonIter2 != commonSent2);
assert(commonSent1 != commonIter1);
assert(commonSent2 != commonIter2);
for (auto i = 1; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
assert(commonSent1 == commonIter1);
}
{
auto iter1 = value_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
const auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
const auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
assert(commonIter1 != commonSent1);
assert(commonIter2 != commonSent2);
assert(commonSent1 != commonIter1);
assert(commonSent2 != commonIter2);
for (auto i = 1; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
assert(commonSent1 == commonIter1);
}
{
auto iter1 = simple_iterator<int*>(buffer);
auto iter2 = comparable_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
const auto commonIter2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(iter2);
const auto commonSent2 = std::common_iterator<decltype(iter2), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
assert(commonIter1 == commonIter2);
assert(commonSent1 != commonIter2);
assert(commonSent1 == commonSent2);
assert(commonSent2 == commonSent1);
assert(commonIter1 != commonSent1);
assert(commonIter2 != commonSent2);
assert(commonSent1 != commonIter1);
assert(commonSent2 != commonIter2);
assert(commonIter1 == commonIter2);
assert(commonIter2 == commonIter1);
for (auto i = 1; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
assert(commonSent1 == commonIter1);
// This check may *seem* incorrect (our iterators point to two completely different
// elements of buffer). However, this is actually what the Standard wants.
// See https://eel.is/c++draft/iterators.common#common.iter.cmp-2.
assert(commonIter1 == commonIter2);
}
{
auto iter1 = cpp17_input_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
const auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
const auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
assert(commonIter1 != commonSent1);
assert(commonIter2 != commonSent2);
assert(commonSent1 != commonIter1);
assert(commonSent2 != commonIter2);
for (auto i = 1; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
assert(commonSent1 == commonIter1);
}
{
auto iter1 = forward_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
const auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
const auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
assert(commonIter1 != commonSent1);
assert(commonIter2 != commonSent2);
assert(commonSent1 != commonIter1);
assert(commonSent2 != commonIter2);
for (auto i = 1; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
assert(commonSent1 == commonIter1);
}
{
auto iter1 = random_access_iterator<int*>(buffer);
auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
auto commonSent1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
const auto commonIter2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
const auto commonSent2 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(sentinel_type<int*>{buffer + 8});
assert(commonIter1 != commonSent1);
assert(commonIter2 != commonSent2);
assert(commonSent1 != commonIter1);
assert(commonSent2 != commonIter2);
assert(commonSent1 == commonSent2);
assert(commonSent2 == commonSent1);
for (auto i = 1; commonIter1 != commonSent1; ++i) {
assert(*(commonIter1++) == i);
}
assert(commonIter1 == commonSent1);
assert(commonSent1 == commonIter1);
}
}
int main(int, char**) {
test();
return 0;
}
|
