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
|
//===----------------------------------------------------------------------===//
//
// 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, RvalueOf<Iter::reference>::type>
// && HasEqualTo<Iter::value_type, T>
// constexpr Iter // constexpr after C++17
// remove(Iter first, Iter last, const T& value);
#include <algorithm>
#include <cassert>
#include <memory>
#include "test_macros.h"
#include "test_iterators.h"
#if TEST_STD_VER > 17
TEST_CONSTEXPR bool test_constexpr() {
int ia[] = {1, 3, 5, 2, 5, 6};
auto it = std::remove(std::begin(ia), std::end(ia), 5);
return (std::begin(ia) + std::size(ia) - 2) == it // we removed two elements
&& std::none_of(std::begin(ia), it, [](int a) {return a == 5; })
;
}
#endif
template <class Iter>
void
test()
{
int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2};
const unsigned sa = sizeof(ia)/sizeof(ia[0]);
Iter r = std::remove(Iter(ia), Iter(ia+sa), 2);
assert(base(r) == ia + sa-3);
assert(ia[0] == 0);
assert(ia[1] == 1);
assert(ia[2] == 3);
assert(ia[3] == 4);
assert(ia[4] == 3);
assert(ia[5] == 4);
}
#if TEST_STD_VER >= 11
template <class Iter>
void
test1()
{
const unsigned sa = 9;
std::unique_ptr<int> ia[sa];
ia[0].reset(new int(0));
ia[1].reset(new int(1));
ia[3].reset(new int(3));
ia[4].reset(new int(4));
ia[6].reset(new int(3));
ia[7].reset(new int(4));
Iter r = std::remove(Iter(ia), Iter(ia+sa), std::unique_ptr<int>());
assert(base(r) == ia + sa-3);
assert(*ia[0] == 0);
assert(*ia[1] == 1);
assert(*ia[2] == 3);
assert(*ia[3] == 4);
assert(*ia[4] == 3);
assert(*ia[5] == 4);
}
#endif // TEST_STD_VER >= 11
int main(int, char**)
{
test<forward_iterator<int*> >();
test<bidirectional_iterator<int*> >();
test<random_access_iterator<int*> >();
test<int*>();
#if TEST_STD_VER >= 11
test1<forward_iterator<std::unique_ptr<int>*> >();
test1<bidirectional_iterator<std::unique_ptr<int>*> >();
test1<random_access_iterator<std::unique_ptr<int>*> >();
test1<std::unique_ptr<int>*>();
#endif // TEST_STD_VER >= 11
#if TEST_STD_VER > 17
static_assert(test_constexpr());
#endif
return 0;
}
|
