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
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <algorithm>
// template<InputIterator Iter1, InputIterator Iter2>
// requires HasEqualTo<Iter1::value_type, Iter2::value_type>
// constexpr bool // constexpr after c++17
// equal(Iter1 first1, Iter1 last1, Iter2 first2);
//
// Introduced in C++14:
// template<InputIterator Iter1, InputIterator Iter2>
// constexpr bool // constexpr after c++17
// equal(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
#include <algorithm>
#include <cassert>
#include <functional>
#include "test_iterators.h"
#include "test_macros.h"
#include "type_algorithms.h"
template <class UnderlyingType, class Iter1>
struct Test {
template <class Iter2>
TEST_CONSTEXPR_CXX20 void operator()() {
UnderlyingType a[] = {0, 1, 2, 3, 4, 5};
const unsigned s = sizeof(a) / sizeof(a[0]);
UnderlyingType b[s] = {0, 1, 2, 5, 4, 5};
assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a)));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b)));
#if TEST_STD_VER >= 14
assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a), std::equal_to<>()));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b), std::equal_to<>()));
assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s)));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s - 1)));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b), Iter2(b + s)));
assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s), std::equal_to<>()));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s - 1), std::equal_to<>()));
assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b), Iter2(b + s), std::equal_to<>()));
#endif
}
};
struct TestNarrowingEqualTo {
template <class UnderlyingType>
TEST_CONSTEXPR_CXX20 void operator()() {
UnderlyingType a[] = {
UnderlyingType(0x1000),
UnderlyingType(0x1001),
UnderlyingType(0x1002),
UnderlyingType(0x1003),
UnderlyingType(0x1004)};
UnderlyingType b[] = {
UnderlyingType(0x1600),
UnderlyingType(0x1601),
UnderlyingType(0x1602),
UnderlyingType(0x1603),
UnderlyingType(0x1604)};
assert(std::equal(a, a + 5, b, std::equal_to<char>()));
#if TEST_STD_VER >= 14
assert(std::equal(a, a + 5, b, b + 5, std::equal_to<char>()));
#endif
}
};
template <class UnderlyingType, class TypeList>
struct TestIter2 {
template <class Iter1>
TEST_CONSTEXPR_CXX20 void operator()() {
types::for_each(TypeList(), Test<UnderlyingType, Iter1>());
}
};
struct AddressCompare {
int i = 0;
TEST_CONSTEXPR_CXX20 AddressCompare(int) {}
operator char() { return static_cast<char>(i); }
friend TEST_CONSTEXPR_CXX20 bool operator==(const AddressCompare& lhs, const AddressCompare& rhs) {
return &lhs == &rhs;
}
friend TEST_CONSTEXPR_CXX20 bool operator!=(const AddressCompare& lhs, const AddressCompare& rhs) {
return &lhs != &rhs;
}
};
#if TEST_STD_VER >= 20
class trivially_equality_comparable {
public:
constexpr trivially_equality_comparable(int i) : i_(i) {}
bool operator==(const trivially_equality_comparable&) const = default;
private:
int i_;
};
#endif
TEST_CONSTEXPR_CXX20 bool test() {
types::for_each(types::cpp17_input_iterator_list<int*>(), TestIter2<int, types::cpp17_input_iterator_list<int*> >());
types::for_each(
types::cpp17_input_iterator_list<char*>(), TestIter2<char, types::cpp17_input_iterator_list<char*> >());
types::for_each(types::cpp17_input_iterator_list<AddressCompare*>(),
TestIter2<AddressCompare, types::cpp17_input_iterator_list<AddressCompare*> >());
types::for_each(types::integral_types(), TestNarrowingEqualTo());
#if TEST_STD_VER >= 20
types::for_each(
types::cpp17_input_iterator_list<trivially_equality_comparable*>{},
TestIter2<trivially_equality_comparable, types::cpp17_input_iterator_list<trivially_equality_comparable*>>{});
#endif
return true;
}
struct Base {};
struct Derived : virtual Base {};
int main(int, char**) {
test();
#if TEST_STD_VER >= 20
static_assert(test());
#endif
types::for_each(types::as_pointers<types::cv_qualified_versions<int> >(),
TestIter2<int, types::as_pointers<types::cv_qualified_versions<int> > >());
types::for_each(types::as_pointers<types::cv_qualified_versions<char> >(),
TestIter2<char, types::as_pointers<types::cv_qualified_versions<char> > >());
{
Derived d;
Derived* a[] = {&d, nullptr};
Base* b[] = {&d, nullptr};
assert(std::equal(a, a + 2, b));
#if TEST_STD_VER >= 14
assert(std::equal(a, a + 2, b, b + 2));
#endif
}
return 0;
}
|
