1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <algorithm>
11
12 // template<ForwardIterator Iter, class T>
13 // requires OutputIterator<Iter, RvalueOf<Iter::reference>::type>
14 // && HasEqualTo<Iter::value_type, T>
15 // constexpr Iter // constexpr after C++17
16 // remove(Iter first, Iter last, const T& value);
17
18 #include <algorithm>
19 #include <cassert>
20 #include <memory>
21
22 #include "test_macros.h"
23 #include "test_iterators.h"
24
25 #if TEST_STD_VER > 17
test_constexpr()26 TEST_CONSTEXPR bool test_constexpr() {
27 int ia[] = {1, 3, 5, 2, 5, 6};
28
29 auto it = std::remove(std::begin(ia), std::end(ia), 5);
30
31 return (std::begin(ia) + std::size(ia) - 2) == it // we removed two elements
32 && std::none_of(std::begin(ia), it, [](int a) {return a == 5; })
33 ;
34 }
35 #endif
36
37 template <class Iter>
38 void
test()39 test()
40 {
41 int ia[] = {0, 1, 2, 3, 4, 2, 3, 4, 2};
42 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
43 Iter r = std::remove(Iter(ia), Iter(ia+sa), 2);
44 assert(base(r) == ia + sa-3);
45 assert(ia[0] == 0);
46 assert(ia[1] == 1);
47 assert(ia[2] == 3);
48 assert(ia[3] == 4);
49 assert(ia[4] == 3);
50 assert(ia[5] == 4);
51 }
52
53 #if TEST_STD_VER >= 11
54 template <class Iter>
55 void
test1()56 test1()
57 {
58 const unsigned sa = 9;
59 std::unique_ptr<int> ia[sa];
60 ia[0].reset(new int(0));
61 ia[1].reset(new int(1));
62 ia[3].reset(new int(3));
63 ia[4].reset(new int(4));
64 ia[6].reset(new int(3));
65 ia[7].reset(new int(4));
66 Iter r = std::remove(Iter(ia), Iter(ia+sa), std::unique_ptr<int>());
67 assert(base(r) == ia + sa-3);
68 assert(*ia[0] == 0);
69 assert(*ia[1] == 1);
70 assert(*ia[2] == 3);
71 assert(*ia[3] == 4);
72 assert(*ia[4] == 3);
73 assert(*ia[5] == 4);
74 }
75 #endif // TEST_STD_VER >= 11
76
main()77 int main()
78 {
79 test<forward_iterator<int*> >();
80 test<bidirectional_iterator<int*> >();
81 test<random_access_iterator<int*> >();
82 test<int*>();
83
84 #if TEST_STD_VER >= 11
85 test1<forward_iterator<std::unique_ptr<int>*> >();
86 test1<bidirectional_iterator<std::unique_ptr<int>*> >();
87 test1<random_access_iterator<std::unique_ptr<int>*> >();
88 test1<std::unique_ptr<int>*>();
89 #endif // TEST_STD_VER >= 11
90
91 #if TEST_STD_VER > 17
92 static_assert(test_constexpr());
93 #endif
94 }
95