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 | // typename tuple_element<I, std::pair<T1, T2> >::type& |
15 | // get(pair<T1, T2>&); |
16 | |
17 | #include <utility> |
18 | #include <cassert> |
19 | |
20 | #include "test_macros.h" |
21 | |
22 | #if TEST_STD_VER > 11 |
23 | struct S { |
24 | std::pair<int, int> a; |
25 | int k; |
26 | constexpr S() : a{1,2}, k(std::get<0>(a)) {} |
27 | }; |
28 | |
29 | constexpr std::pair<int, int> getP () { return { 3, 4 }; } |
30 | #endif |
31 | |
32 | int main(int, char**) |
33 | { |
34 | { |
35 | typedef std::pair<int, short> P; |
36 | P p(3, static_cast<short>(4)); |
37 | assert(std::get<0>(p) == 3); |
38 | assert(std::get<1>(p) == 4); |
39 | std::get<0>(in&: p) = 5; |
40 | std::get<1>(in&: p) = 6; |
41 | assert(std::get<0>(p) == 5); |
42 | assert(std::get<1>(p) == 6); |
43 | } |
44 | |
45 | #if TEST_STD_VER > 11 |
46 | { |
47 | static_assert(S().k == 1, "" ); |
48 | static_assert(std::get<1>(getP()) == 4, "" ); |
49 | } |
50 | #endif |
51 | |
52 | |
53 | return 0; |
54 | } |
55 | |