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