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 // <utility>
10
11 // template <class T1, class T2> struct pair
12
13 // template<size_t I, class T1, class T2>
14 // const typename tuple_element<I, std::pair<T1, T2> >::type&&
15 // get(const pair<T1, T2>&&);
16
17 // UNSUPPORTED: c++03
18
19 #include <utility>
20 #include <memory>
21 #include <type_traits>
22 #include <cassert>
23
24 #include "test_macros.h"
25
main(int,char **)26 int main(int, char**)
27 {
28 {
29 typedef std::pair<std::unique_ptr<int>, short> P;
30 const P p(std::unique_ptr<int>(new int(3)), static_cast<short>(4));
31 static_assert(std::is_same<const std::unique_ptr<int>&&, decltype(std::get<0>(std::move(p)))>::value, "");
32 static_assert(noexcept(std::get<0>(std::move(p))), "");
33 const std::unique_ptr<int>&& ptr = std::get<0>(std::move(p));
34 assert(*ptr == 3);
35 }
36
37 {
38 int x = 42;
39 int const y = 43;
40 std::pair<int&, int const&> const p(x, y);
41 static_assert(std::is_same<int&, decltype(std::get<0>(std::move(p)))>::value, "");
42 static_assert(noexcept(std::get<0>(std::move(p))), "");
43 static_assert(std::is_same<int const&, decltype(std::get<1>(std::move(p)))>::value, "");
44 static_assert(noexcept(std::get<1>(std::move(p))), "");
45 }
46
47 {
48 int x = 42;
49 int const y = 43;
50 std::pair<int&&, int const&&> const p(std::move(x), std::move(y));
51 static_assert(std::is_same<int&&, decltype(std::get<0>(std::move(p)))>::value, "");
52 static_assert(noexcept(std::get<0>(std::move(p))), "");
53 static_assert(std::is_same<int const&&, decltype(std::get<1>(std::move(p)))>::value, "");
54 static_assert(noexcept(std::get<1>(std::move(p))), "");
55 }
56
57 #if TEST_STD_VER > 11
58 {
59 typedef std::pair<int, short> P;
60 constexpr const P p1(3, static_cast<short>(4));
61 static_assert(std::get<0>(std::move(p1)) == 3, "");
62 static_assert(std::get<1>(std::move(p1)) == 4, "");
63 }
64 #endif
65
66 return 0;
67 }
68