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