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 // <vector>
10 // UNSUPPORTED: c++03, c++11, c++14
11
12 // template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
13 // vector(InputIterator, InputIterator, Allocator = Allocator())
14 // -> vector<typename iterator_traits<InputIterator>::value_type, Allocator>;
15 //
16
17 #include <vector>
18 #include <cassert>
19 #include <cstddef>
20 #include <climits> // INT_MAX
21 #include <iterator>
22 #include <type_traits>
23
24 #include "deduction_guides_sfinae_checks.h"
25 #include "test_macros.h"
26 #include "test_iterators.h"
27 #include "test_allocator.h"
28
29 struct A {};
30
tests()31 TEST_CONSTEXPR_CXX20 bool tests() {
32
33 // Test the explicit deduction guides
34 {
35 const int arr[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
36 std::vector vec(std::begin(arr), std::end(arr));
37
38 static_assert(std::is_same_v<decltype(vec), std::vector<int>>, "");
39 assert(std::equal(vec.begin(), vec.end(), std::begin(arr), std::end(arr)));
40 }
41
42 {
43 const long arr[] = {INT_MAX, 1L, 2L, 3L };
44 std::vector vec(std::begin(arr), std::end(arr), std::allocator<long>());
45 static_assert(std::is_same_v<decltype(vec)::value_type, long>, "");
46 assert(vec.size() == 4);
47 assert(vec[0] == INT_MAX);
48 assert(vec[1] == 1L);
49 assert(vec[2] == 2L);
50 }
51
52 // Test the implicit deduction guides
53
54 {
55 // We don't expect this one to work.
56 // std::vector vec(std::allocator<int>()); // vector (allocator &)
57 }
58
59 {
60 std::vector vec(1, A{}); // vector (size_type, T)
61 static_assert(std::is_same_v<decltype(vec)::value_type, A>, "");
62 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<A>>, "");
63 assert(vec.size() == 1);
64 }
65
66 {
67 std::vector vec(1, A{}, test_allocator<A>()); // vector (size_type, T, allocator)
68 static_assert(std::is_same_v<decltype(vec)::value_type, A>, "");
69 static_assert(std::is_same_v<decltype(vec)::allocator_type, test_allocator<A>>, "");
70 assert(vec.size() == 1);
71 }
72
73 {
74 std::vector vec{1U, 2U, 3U, 4U, 5U}; // vector(initializer-list)
75 static_assert(std::is_same_v<decltype(vec)::value_type, unsigned>, "");
76 assert(vec.size() == 5);
77 assert(vec[2] == 3U);
78 }
79
80 {
81 std::vector vec({1.0, 2.0, 3.0, 4.0}, test_allocator<double>()); // vector(initializer-list, allocator)
82 static_assert(std::is_same_v<decltype(vec)::value_type, double>, "");
83 static_assert(std::is_same_v<decltype(vec)::allocator_type, test_allocator<double>>, "");
84 assert(vec.size() == 4);
85 assert(vec[3] == 4.0);
86 }
87
88 {
89 std::vector<long double> source;
90 std::vector vec(source); // vector(vector &)
91 static_assert(std::is_same_v<decltype(vec)::value_type, long double>, "");
92 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<long double>>, "");
93 assert(vec.size() == 0);
94 }
95
96
97 // A couple of vector<bool> tests, too!
98 {
99 std::vector vec(3, true); // vector(initializer-list)
100 static_assert(std::is_same_v<decltype(vec)::value_type, bool>, "");
101 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<bool>>, "");
102 assert(vec.size() == 3);
103 assert(vec[0] && vec[1] && vec[2]);
104 }
105
106 {
107 std::vector<bool> source;
108 std::vector vec(source); // vector(vector &)
109 static_assert(std::is_same_v<decltype(vec)::value_type, bool>, "");
110 static_assert(std::is_same_v<decltype(vec)::allocator_type, std::allocator<bool>>, "");
111 assert(vec.size() == 0);
112 }
113
114 {
115 typedef test_allocator<short> Alloc;
116 typedef test_allocator<int> ConvertibleToAlloc;
117
118 {
119 std::vector<short, Alloc> source;
120 std::vector vec(source, Alloc(2));
121 static_assert(std::is_same_v<decltype(vec), decltype(source)>);
122 }
123
124 {
125 std::vector<short, Alloc> source;
126 std::vector vec(source, ConvertibleToAlloc(2));
127 static_assert(std::is_same_v<decltype(vec), decltype(source)>);
128 }
129
130 {
131 std::vector<short, Alloc> source;
132 std::vector vec(std::move(source), Alloc(2));
133 static_assert(std::is_same_v<decltype(vec), decltype(source)>);
134 }
135
136 {
137 std::vector<short, Alloc> source;
138 std::vector vec(std::move(source), ConvertibleToAlloc(2));
139 static_assert(std::is_same_v<decltype(vec), decltype(source)>);
140 }
141 }
142
143 SequenceContainerDeductionGuidesSfinaeAway<std::vector, std::vector<int>>();
144
145 return true;
146 }
147
main(int,char **)148 int main(int, char**) {
149 tests();
150 #if TEST_STD_VER > 17
151 static_assert(tests());
152 #endif
153 return 0;
154 }
155