36     std::deque deq(std::begin(arr), std::end(arr));  in main()  local
38     static_assert(std::is_same_v<decltype(deq), std::deque<int>>, "");  in main()
39     assert(std::equal(deq.begin(), deq.end(), std::begin(arr), std::end(arr)));  in main()
44     std::deque deq(std::begin(arr), std::end(arr), std::allocator<long>());  in main()
45     static_assert(std::is_same_v<decltype(deq)::value_type, long>, "");  in main()
46     assert(deq.size() == 4);  in main()
47     assert(deq[0] == INT_MAX);  in main()
48     assert(deq[1] == 1L);  in main()
49     assert(deq[2] == 2L);  in main()
60     std::deque deq(1, A{}); // deque (size_type, T)  in main()  local
61     static_assert(std::is_same_v<decltype(deq)::value_type, A>, "");  in main()
62     static_assert(std::is_same_v<decltype(deq)::allocator_type, std::allocator<A>>, "");  in main()
63     assert(deq.size() == 1);  in main()
67     std::deque deq(1, A{}, test_allocator<A>()); // deque (size_type, T, allocator)  in main()  local
68     static_assert(std::is_same_v<decltype(deq)::value_type, A>, "");  in main()
69     static_assert(std::is_same_v<decltype(deq)::allocator_type, test_allocator<A>>, "");  in main()
70     assert(deq.size() == 1);  in main()
74     std::deque deq{1U, 2U, 3U, 4U, 5U}; // deque(initializer-list)  in main()  local
75     static_assert(std::is_same_v<decltype(deq)::value_type, unsigned>, "");  in main()
76     assert(deq.size() == 5);  in main()
77     assert(deq[2] == 3U);  in main()
81 …std::deque deq({1.0, 2.0, 3.0, 4.0}, test_allocator<double>()); // deque(initializer-list, allocat…  in main()
82     static_assert(std::is_same_v<decltype(deq)::value_type, double>, "");  in main()
83     static_assert(std::is_same_v<decltype(deq)::allocator_type, test_allocator<double>>, "");  in main()
84     assert(deq.size() == 4);  in main()
85     assert(deq[3] == 4.0);  in main()
90     std::deque deq(source); // deque(deque &)  in main()  local
91     static_assert(std::is_same_v<decltype(deq)::value_type, long double>, "");  in main()
92     static_assert(std::is_same_v<decltype(deq)::allocator_type, std::allocator<long double>>, "");  in main()
93     assert(deq.size() == 0);  in main()
102         std::deque deq(source, Alloc(2));  in main()  local
103         static_assert(std::is_same_v<decltype(deq), decltype(source)>);  in main()
108         std::deque deq(source, ConvertibleToAlloc(2));  in main()  local
109         static_assert(std::is_same_v<decltype(deq), decltype(source)>);  in main()
114         std::deque deq(std::move(source), Alloc(2));  in main()  local
115         static_assert(std::is_same_v<decltype(deq), decltype(source)>);  in main()
120         std::deque deq(std::move(source), ConvertibleToAlloc(2));  in main()  local
121         static_assert(std::is_same_v<decltype(deq), decltype(source)>);  in main()