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 // <array>
10 
11 // template <size_t I, class T, size_t N> const T&& get(const array<T, N>&& a);
12 
13 // UNSUPPORTED: c++03
14 
15 #include <array>
16 #include <memory>
17 #include <type_traits>
18 #include <utility>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
23 int main(int, char**)
24 {
25 
26     {
27         typedef std::unique_ptr<double> T;
28         typedef std::array<T, 1> C;
29         const C c = {std::unique_ptr<double>(new double(3.5))};
30         static_assert(std::is_same<const T&&, decltype(std::get<0>(std::move(c)))>::value, "");
31         static_assert(noexcept(std::get<0>(std::move(c))), "");
32         const T&& t = std::get<0>(std::move(c));
33         assert(*t == 3.5);
34     }
35 
36 #if TEST_STD_VER >= 14
37     {
38         typedef double T;
39         typedef std::array<T, 3> C;
40         constexpr const C c = {1, 2, 3.5};
41         static_assert(std::get<0>(std::move(c)) == 1, "");
42         static_assert(std::get<1>(std::move(c)) == 2, "");
43         static_assert(std::get<2>(std::move(c)) == 3.5, "");
44     }
45 #endif
46 
47     return 0;
48 }
49