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
23struct S {
24 std::pair<int, int> a;
25 int k;
26 constexpr S() : a{1,2}, k(std::get<0>(a)) {}
27 };
28
29constexpr std::pair<int, int> getP () { return { 3, 4 }; }
30#endif
31
32int 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

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