1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03 && !stdlib=libc++
10 // ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=2000000
11
12 // <algorithm>
13
14 // template<InputIterator InIter, typename OutIter>
15 // requires OutputIterator<OutIter, RvalueOf<InIter::reference>::type>
16 // OutIter
17 // move(InIter first, InIter last, OutIter result);
18
19 #include <algorithm>
20 #include <cassert>
21 #include <iterator>
22 #include <memory>
23
24 #include "MoveOnly.h"
25 #include "test_iterators.h"
26 #include "test_macros.h"
27
28 class PaddedBase {
29 public:
PaddedBase(std::int16_t a,std::int8_t b)30 TEST_CONSTEXPR PaddedBase(std::int16_t a, std::int8_t b) : a_(a), b_(b) {}
31
32 std::int16_t a_;
33 std::int8_t b_;
34 };
35
36 class Derived : public PaddedBase {
37 public:
Derived(std::int16_t a,std::int8_t b,std::int8_t c)38 TEST_CONSTEXPR Derived(std::int16_t a, std::int8_t b, std::int8_t c) : PaddedBase(a, b), c_(c) {}
39
40 std::int8_t c_;
41 };
42
43 template <class InIter>
44 struct Test {
45 template <class OutIter>
operator ()Test46 TEST_CONSTEXPR_CXX20 void operator()() {
47 const unsigned N = 1000;
48 int ia[N] = {};
49 for (unsigned i = 0; i < N; ++i)
50 ia[i] = i;
51 int ib[N] = {0};
52
53 OutIter r = std::move(InIter(ia), InIter(ia+N), OutIter(ib));
54 assert(base(r) == ib+N);
55 for (unsigned i = 0; i < N; ++i)
56 assert(ia[i] == ib[i]);
57 }
58 };
59
60 struct TestOutIters {
61 template <class InIter>
operator ()TestOutIters62 TEST_CONSTEXPR_CXX20 void operator()() {
63 types::for_each(
64 types::concatenate_t<types::cpp17_input_iterator_list<int*>, types::type_list<cpp17_output_iterator<int*> > >(),
65 Test<InIter>());
66 }
67 };
68
69 template <class InIter>
70 struct Test1 {
71 template <class OutIter>
operator ()Test172 TEST_CONSTEXPR_CXX23 void operator()() {
73 const unsigned N = 100;
74 std::unique_ptr<int> ia[N];
75 for (unsigned i = 0; i < N; ++i)
76 ia[i].reset(new int(i));
77 std::unique_ptr<int> ib[N];
78
79 OutIter r = std::move(InIter(ia), InIter(ia+N), OutIter(ib));
80 assert(base(r) == ib+N);
81 for (unsigned i = 0; i < N; ++i)
82 assert(*ib[i] == static_cast<int>(i));
83 }
84 };
85
86 struct Test1OutIters {
87 template <class InIter>
operator ()Test1OutIters88 TEST_CONSTEXPR_CXX23 void operator()() {
89 types::for_each(types::concatenate_t<types::cpp17_input_iterator_list<std::unique_ptr<int>*>,
90 types::type_list<cpp17_output_iterator<std::unique_ptr<int>*> > >(),
91 Test1<InIter>());
92 }
93 };
94
test()95 TEST_CONSTEXPR_CXX20 bool test() {
96 types::for_each(types::cpp17_input_iterator_list<int*>(), TestOutIters());
97 if (TEST_STD_AT_LEAST_23_OR_RUNTIME_EVALUATED)
98 types::for_each(types::cpp17_input_iterator_list<std::unique_ptr<int>*>(), Test1OutIters());
99
100 { // Make sure that padding bits aren't copied
101 Derived src(1, 2, 3);
102 Derived dst(4, 5, 6);
103 std::move(static_cast<PaddedBase*>(&src), static_cast<PaddedBase*>(&src) + 1, static_cast<PaddedBase*>(&dst));
104 assert(dst.a_ == 1);
105 assert(dst.b_ == 2);
106 assert(dst.c_ == 6);
107 }
108
109 { // Make sure that overlapping ranges can be copied
110 int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
111 std::move(a + 3, a + 10, a);
112 int expected[] = {4, 5, 6, 7, 8, 9, 10, 8, 9, 10};
113 assert(std::equal(a, a + 10, expected));
114 }
115
116 // Make sure that the algorithm works with move-only types
117 {
118 // When non-trivial
119 {
120 MoveOnly from[3] = {1, 2, 3};
121 MoveOnly to[3] = {};
122 std::move(std::begin(from), std::end(from), std::begin(to));
123 assert(to[0] == MoveOnly(1));
124 assert(to[1] == MoveOnly(2));
125 assert(to[2] == MoveOnly(3));
126 }
127 // When trivial
128 {
129 TrivialMoveOnly from[3] = {1, 2, 3};
130 TrivialMoveOnly to[3] = {};
131 std::move(std::begin(from), std::end(from), std::begin(to));
132 assert(to[0] == TrivialMoveOnly(1));
133 assert(to[1] == TrivialMoveOnly(2));
134 assert(to[2] == TrivialMoveOnly(3));
135 }
136 }
137
138 return true;
139 }
140
main(int,char **)141 int main(int, char**) {
142 test();
143 #if TEST_STD_VER >= 20
144 static_assert(test());
145 #endif
146
147 return 0;
148 }
149