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
|
//===----------------------------------------------------------------------===//
//
// 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<ForwardIterator Iter, class T>
// requires OutputIterator<Iter, const T&>
// constexpr void // constexpr after C++17
// fill(Iter first, Iter last, const T& value);
#include <algorithm>
#include <array>
#include <cassert>
#include <cstddef>
#include <vector>
#include "sized_allocator.h"
#include "test_macros.h"
#include "test_iterators.h"
#include "type_algorithms.h"
template <class Iter, class Container>
TEST_CONSTEXPR_CXX20 void
test(Container in, size_t from, size_t to, typename Container::value_type value, Container expected) {
std::fill(Iter(in.data() + from), Iter(in.data() + to), value);
assert(in == expected);
}
template <class T>
struct Test {
template <class Iter>
TEST_CONSTEXPR_CXX20 void operator()() {
{
std::array<T, 4> in = {1, 2, 3, 4};
std::array<T, 4> expected = {5, 5, 5, 5};
test<Iter>(in, 0, 4, 5, expected);
}
{
std::array<T, 4> in = {1, 2, 3, 4};
std::array<T, 4> expected = {1, 5, 5, 4};
test<Iter>(in, 1, 3, 5, expected);
}
}
};
TEST_CONSTEXPR_CXX20 bool test_vector_bool(std::size_t N) {
{ // Test cases validating leading/trailing bits unfilled remain unchanged
{ // Leading bits are not filled
std::vector<bool> in(N, false);
std::vector<bool> expected(N, true);
expected[0] = expected[1] = false;
std::fill(in.begin() + 2, in.end(), true);
assert(in == expected);
}
{ // Trailing bits are not filled
std::vector<bool> in(N, false);
std::vector<bool> expected(N, true);
expected[N - 1] = expected[N - 2] = false;
std::fill(in.begin(), in.end() - 2, true);
assert(in == expected);
}
{ // Leading and trailing bits are not filled
std::vector<bool> in(N, false);
std::vector<bool> expected(N, true);
expected[0] = expected[1] = expected[N - 1] = expected[N - 2] = false;
std::fill(in.begin() + 2, in.end() - 2, true);
assert(in == expected);
}
}
{ // Test cases with full or partial bytes filled
{ // Full bytes filled
std::vector<bool> in(N, false);
std::vector<bool> expected(N, true);
std::fill(in.begin(), in.end(), true);
assert(in == expected);
}
{ // Partial bytes with offset filled
std::vector<bool> in(N, false);
std::vector<bool> expected(N, true);
std::fill(in.begin() + 4, in.end() - 4, true);
std::fill(expected.begin(), expected.begin() + 4, false);
std::fill(expected.end() - 4, expected.end(), false);
assert(in == expected);
}
}
return true;
}
TEST_CONSTEXPR_CXX20 bool test() {
types::for_each(types::forward_iterator_list<char*>(), Test<char>());
types::for_each(types::forward_iterator_list<int*>(), Test<int>());
{ // Test vector<bool>::iterator optimization
assert(test_vector_bool(8));
assert(test_vector_bool(19));
assert(test_vector_bool(32));
assert(test_vector_bool(49));
assert(test_vector_bool(64));
assert(test_vector_bool(199));
assert(test_vector_bool(256));
// Make sure std::fill behaves properly with std::vector<bool> iterators with custom size types.
// See https://github.com/llvm/llvm-project/pull/122410.
{
using Alloc = sized_allocator<bool, std::uint8_t, std::int8_t>;
std::vector<bool, Alloc> in(100, false, Alloc(1));
std::vector<bool, Alloc> expected(100, true, Alloc(1));
std::fill(in.begin(), in.end(), true);
assert(in == expected);
}
{
using Alloc = sized_allocator<bool, std::uint16_t, std::int16_t>;
std::vector<bool, Alloc> in(200, false, Alloc(1));
std::vector<bool, Alloc> expected(200, true, Alloc(1));
std::fill(in.begin(), in.end(), true);
assert(in == expected);
}
{
using Alloc = sized_allocator<bool, std::uint32_t, std::int32_t>;
std::vector<bool, Alloc> in(200, false, Alloc(1));
std::vector<bool, Alloc> expected(200, true, Alloc(1));
std::fill(in.begin(), in.end(), true);
assert(in == expected);
}
{
using Alloc = sized_allocator<bool, std::uint64_t, std::int64_t>;
std::vector<bool, Alloc> in(200, false, Alloc(1));
std::vector<bool, Alloc> expected(200, true, Alloc(1));
std::fill(in.begin(), in.end(), true);
assert(in == expected);
}
}
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 20
static_assert(test());
#endif
return 0;
}
|
