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 && !stdlib=libc++
18
19#include <utility>
20#include <memory>
21#include <type_traits>
22#include <cassert>
23
24#include "test_macros.h"
25
26int main(int, char**)
27{
28 {
29#if TEST_STD_VER >= 11
30 typedef std::pair<std::unique_ptr<int>, short> P;
31 const P p(std::unique_ptr<int>(new int(3)), static_cast<short>(4));
32 static_assert(std::is_same<const std::unique_ptr<int>&&, decltype(std::get<0>(std::move(p)))>::value, "");
33 static_assert(noexcept(std::get<0>(std::move(p))), "");
34 const std::unique_ptr<int>&& ptr = std::get<0>(std::move(p));
35 assert(*ptr == 3);
36#endif
37 }
38
39 {
40 int x = 42;
41 int const y = 43;
42 std::pair<int&, int const&> const p(x, y);
43 static_assert(std::is_same<int&, decltype(std::get<0>(std::move(p)))>::value, "");
44 static_assert(std::is_same<int const&, decltype(std::get<1>(std::move(p)))>::value, "");
45#if TEST_STD_VER >= 11
46 static_assert(noexcept(std::get<0>(std::move(p))), "");
47 static_assert(noexcept(std::get<1>(std::move(p))), "");
48#endif
49 }
50
51 {
52#if TEST_STD_VER >= 11
53 int x = 42;
54 int const y = 43;
55 std::pair<int&&, int const&&> const p(std::move(x), std::move(y));
56 static_assert(std::is_same<int&&, decltype(std::get<0>(std::move(p)))>::value, "");
57 static_assert(noexcept(std::get<0>(std::move(p))), "");
58 static_assert(std::is_same<int const&&, decltype(std::get<1>(std::move(p)))>::value, "");
59 static_assert(noexcept(std::get<1>(std::move(p))), "");
60#endif
61 }
62
63#if TEST_STD_VER > 11
64 {
65 typedef std::pair<int, short> P;
66 constexpr const P p1(3, static_cast<short>(4));
67 static_assert(std::get<0>(std::move(p1)) == 3, "");
68 static_assert(std::get<1>(std::move(p1)) == 4, "");
69 }
70#endif
71
72 return 0;
73}
74

source code of libcxx/test/std/utilities/utility/pairs/pair.astuple/get_const_rv.pass.cpp