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